WO2022117809A1 - Paper pulp and uses thereof - Google Patents
Paper pulp and uses thereof Download PDFInfo
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- WO2022117809A1 WO2022117809A1 PCT/EP2021/084154 EP2021084154W WO2022117809A1 WO 2022117809 A1 WO2022117809 A1 WO 2022117809A1 EP 2021084154 W EP2021084154 W EP 2021084154W WO 2022117809 A1 WO2022117809 A1 WO 2022117809A1
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- WO
- WIPO (PCT)
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- advantageously
- weight
- paper pulp
- content
- paper
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- 229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 177
- 150000004676 glycans Chemical class 0.000 claims abstract description 89
- 229920001282 polysaccharide Polymers 0.000 claims abstract description 89
- 239000005017 polysaccharide Substances 0.000 claims abstract description 89
- 238000000034 method Methods 0.000 claims abstract description 33
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 239000000123 paper Substances 0.000 claims description 72
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- 239000002689 soil Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 description 1
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 1
- 235000012141 vanillin Nutrition 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H99/00—Subject matter not provided for in other groups of this subclass, e.g. flours, kernels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/04—Alginic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L99/00—Compositions of natural macromolecular compounds or of derivatives thereof not provided for in groups C08L89/00 - C08L97/00
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
Definitions
- the present invention relates to a paper pulp obtained from brown algae, as well as its method of preparation.
- the present invention also relates to a paper composition, a process for manufacturing paper from the paper composition and its uses in the manufacture of paper and/or cardboard.
- wood for the manufacture of paper pulp has many disadvantages.
- the use of wood can contribute to deforestation and forestry has environmental impacts on soil diversity or quality. It is also positioned in a context of increasing occupation of terrestrial spaces by human activity.
- the bleaching agents used such as chlorine, are very polluting and toxic substances for nature and their new alternatives always present a significant environmental impact.
- to extract the cellulose from the wood fibres, and during the bleaching steps it is necessary to use very large quantities of water.
- producing a sheet of paper from wood requires about 17 watt hours.
- the manufacture of paper from wood is very polluting, water and energy consuming and can contribute to deforestation and changes in land allocation.
- the document EP488486 describes a process for the production of paper pulp, which uses, as an ingredient of the paper pulp, an algae belonging to the genus Closterium or genus Pleurotaenium, containing cellulose as a component of its cell wall, which has a long algal body, and whose ratio of body length to body width is 10 to 200.
- an algae belonging to the genus Closterium or genus Pleurotaenium containing cellulose as a component of its cell wall, which has a long algal body, and whose ratio of body length to body width is 10 to 200.
- bleaching agents such as chlorine or ozone is necessary.
- the Applicant of the present invention therefore proposes a new paper pulp, rich in mineral matter and in non-cellulosic polysaccharides.
- the present invention relates to a paper pulp comprising:
- This new paper pulp makes it possible to obtain a paper with advantageous physico-chemical characteristics, while reducing production costs and being environmentally friendly.
- the present invention provides a simple, effective and economical solution, which makes it possible to manufacture a paper having a relatively high content of mineral matter derived from algae and does not require the addition of mineral fillers of mining or chemical origin to provide opacity, softness and elasticity to paper.
- the present invention shows no or no significant dark marks or inclusions.
- paper pulp means a pulp intended to be used for the preparation of paper.
- the term “mineral material” means a material chosen from the group comprising chlorides, sulphates, carbonates, and the counterions of these compounds and ionic polysaccharides, such as sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), iodine (I), copper (Cu), zinc (Zn) and selenium (Se) and a mixture thereof.
- the term “content” means the quantity or the concentration of a compound remaining after drying of the paper pulp according to the invention.
- the mineral matter content of the paper pulp according to the invention is at least 30% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the mineral matter content of the paper pulp according to the invention is at least 31% by weight, advantageously at least 32% by weight, advantageously at least 33% by weight, advantageously at least 34% by weight, advantageously at least 35% by weight, advantageously at least 36% by weight, advantageously at least 37% by weight, advantageously at least 38% by weight, advantageously at least 39% by weight, advantageously at least 40% by weight, advantageously at least least least 41% by weight, advantageously at least 42% by weight, advantageously at least 43% by weight, advantageously at least 44% by weight, advantageously at least 45% by weight, advantageously at least 46% by weight, advantageously at least 47 % by weight, advantageously at least 48% by weight, advantageously at least 49% by weight, advantageously at least 50% by weight, advantageously at least 51% by weight, advantageously at least 52% by weight, advantageously at least 53% by weight,
- the mineral matter content of the paper pulp according to the invention is between 30% and 70% by total weight of the dry matter contained in the paper pulp.
- the content of mineral matter in the paper pulp according to the invention is between 30% and 65% by weight, advantageously between 30% and 60% by weight, advantageously between 30% and 55% by weight, advantageously between 30 % and 50% by weight, advantageously between 30% and 45% by weight, advantageously between 30% and 40% by weight by weight relative to the total weight of the dry matter contained in the paper pulp.
- the term “monosaccharides” means an aldose. It may be in particular arabinose, xylose, mannose, rhamnose, glucose, galactose, arabinose, fructose.
- the monosaccharides according to the invention can be in a D or L form.
- uronic acids means an aldose in which an alcohol group has been oxidized. It may be in particular iduronic acid, galacturonic acid, glucuronic acid, mannuronic acid and guluronic acid.
- the uronic acids according to the invention can be in a D or L form.
- polyols means monosaccharides whose aldehyde function has been reduced. This is most particularly mannitol in the context of the present invention.
- polysaccharides means any polymer consisting of several monosaccharides having the general formula: -[Cx(H 2 0)y)]n- (where y is generally x - 1) and bonded between them by O-osidic bonds.
- Polysaccharides can also consist of several uronic acids, having the general formula: -[Cx(H 2 )yOz)]n- (where y is generally x - 1 and z is generally x+1) and linked together by O-osidic bonds.
- Polysaccharides can be linear or branched in structure.
- the polysaccharides comprise in particular subunits comprising between 5 and 6 carbon atoms, such as subunits chosen from a group consisting of arabinose, xylose, mannose, rhamnose, glucose, galactose, fructose, iduronic acid, galacturonic acid, glucuronic acid, mannuronic acid and l guluronic acid, and mannitol. These polysaccharides can also be substituted, in particular by sulphate groups.
- Polysaccharides have a molecular weight between 5 kDa and 2000 kDa. In a particular embodiment, the polysaccharides have a molecular weight between about 10 kDa and about 800 kDa.
- the polysaccharides according to the invention can be cellulosic polysaccharides and/or non-cellulosic polysaccharides.
- non-cellulose polysaccharides means polysaccharides which are not mainly constituted by glucose units linked in the beta-(1,4) position (“cellulose”).
- alginates means polysaccharides consisting of guluronic acid and mannuronic acid.
- fucoidans means complex polysaccharides rich in fucose and comprising in particular, as complementary monomers, mannose, glucose, xylose, arabinose, rhamnose, and glucuronic acid. These polysaccharides are also decorated with a wide variety of substituents and may in particular be sulphated, methylated or acetylated. Fucoidan can include fucoidan fragments generated by the breakdown (eg, hydrolysis) of larger fucoidan molecules. Degradation can be achieved by any of the techniques known to those skilled in the art, including treating fucoidan with acid, base, heat or enzymes to yield degraded fucoidan.
- Fucoidans can also be chemically modified and may have modifications including, but not limited to, sulfation, polysulfation, acetylation, esterification, and methylation as well as desulfation, deacetylation, or saponification .
- laminarin is understood to mean a polysaccharide mainly composed of glucose units linked at alpha-(1,4), and which may have a mannitol fraction.
- the content of non-cellulosic polysaccharides in the paper pulp according to the invention is at least 10% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the content of non-cellulosic polysaccharides in the paper pulp according to the invention is at least 10.5% by weight, advantageously at least 11.0% by weight, advantageously at least 11.5% by weight, advantageously at least 12.0% by weight, preferably at least 12.5% by weight, preferably at least 13% by weight, preferably at least 13.5% by weight, preferably at least 14.0% by weight, preferably at least 14.5% by weight, advantageously at least 15% by weight, advantageously at least 15.5% by weight, advantageously at least 16% by weight, advantageously at least 16.5% by weight, advantageously at least 17% by weight , advantageously at least 17.5% by weight, advantageously at least 18% by weight, advantageously at least 18.5% by weight, advantageously at least 19% by weight, advantageously at least 19.5% by weight, advantageously at least 20% by weight, advantageously at least 20.5% by weight, advantageously at least 21% by weight, advantageously at least ns 21.5% by weight, advantageously at least 22% by weight, advantageously at least 22.5% by weight,
- the content of non-cellulosic polysaccharides in the paper pulp according to the invention is between 10% and 30% by total weight of the dry matter contained in the paper pulp.
- the content of non-cellulosic polysaccharides in the paper pulp according to the invention is between 10% and 25% by weight, advantageously between 11% and 24% by weight, advantageously between 12% and 23% by weight, advantageously between 13% and 22% by weight, advantageously between 14% and 21% by weight, advantageously between 15% and 20% by weight, advantageously between 16% and 19% by weight relative to the total weight of the dry matter contained in the pulp.
- the content of non-cellulosic polysaccharides of the paper pulp according to the invention is between 16% and 18.9% by weight relative to the total weight of the dry matter contained in paper pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is 16% by weight relative to the total weight of the dry matter contained in the paper pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is 19.8% by weight relative to the total weight of the dry matter contained in the paper pulp. .
- the paper pulp according to the invention Due to its content of non-cellulosic polysaccharides, the paper pulp according to the invention has good mechanical properties of strength and pliability. In addition, non-cellulosic polysaccharides play an important role in paper opacity and occlusion.
- the non-cellulosic polysaccharide may be chosen from the group comprising alginates, fucoidans, laminarin or a mixture thereof.
- the non-cellulosic polysaccharide can therefore consist of a single non-cellulosic polysaccharide or of a mixture of non-cellulosic polysaccharides.
- the non-cellulosic polysaccharides of the paper pulp of the invention comprise fucoidan and alginates, the respective contents of which are at least 7.0% fucoidan and at least 3.0 % of alginate by weight relative to the total weight of the dry matter contained in the paper pulp.
- the fucoidan content contained in the paper pulp is at least 7% by weight and the alginate content contained in the paper pulp is at least 3% by weight relative to the weight total dry matter contained in the pulp.
- the fucoidan content is at least 7% by weight, advantageously at least 7.1% by weight, advantageously at least 7.2% by weight, advantageously at least 7.3% by weight, advantageously at least 7 4% by weight, advantageously at least 7.5% by weight, advantageously at least 7.6% by weight, advantageously at least 7.7% by weight, advantageously at least 7.8% by weight, advantageously at least 7 9% by weight, advantageously at least 8.0% by weight, advantageously at least 8.1% by weight, advantageously at least 8.2% by weight, advantageously at least 8.3% by weight, advantageously at least 8 4% by weight, advantageously at least 8.5% by weight, advantageously at least 8.6% by weight, advantageously at least 8.7% by weight, advantageously at least 8.8% by weight, advantageously at least 8 9% by weight, advantageously at least 9.0% by weight
- the fucoidan content is between 7% and 20% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the fucoidan content is between 7.5% and 19.5% by weight, advantageously between 7.5% and 19.0% by weight, advantageously between 7.5% and 18.5% by weight, advantageously between 7.5% and 18.0% by weight, advantageously between 7.5% and 17.5% by weight, advantageously between 7.5% and 17.0% by weight, advantageously between 7.5% and 16, 5% by weight, advantageously between 7.5% and 16.0% by weight, advantageously between 7.5% and 15.5% by weight, advantageously between 7.5% and 15.0% by weight, advantageously between 7 .5% and 14.5% by weight, advantageously between 7.5% and 14.0% by weight, advantageously between 7.5% and 13.5% by weight, advantageously between 7.5% and 13.0% by weight, advantageously between 7.5% and 12.5% by weight, advantageously between 7.6% and 12.4% by weight, advantageously between 7.7% and 12.3% by weight, advantageously between 7.8 % and 12.2% by weight, advantageously between 7.9% and 12.
- the alginate content is at least 3% by weight, advantageously at least 3.1% by weight, advantageously at least 3.2% by weight, advantageously at least 3.3% by weight, advantageously at least 3 4% by weight, advantageously at least 3.5% by weight, advantageously at least 3.6% by weight, advantageously at least 3.7% by weight, advantageously at least 3.8% by weight, advantageously at least 3 9% by weight, advantageously at least 4.0% by weight, advantageously at least 4.1% by weight, advantageously at least 4.2% by weight, advantageously at least 4.3% by weight, advantageously at least 4 4% by weight, advantageously at least 4.5% by weight, advantageously at least 4.6% by weight, advantageously at least 4.7% by weight, advantageously at least 4.8% by weight, advantageously at least 4 9% by weight, advantageously at least 5.0% by weight, advantageously at least 5.1% by weight, advantageously at least 5.2% by weight, advantageously at least 5.3% by weight, advantageously nt at least 5.4% by weight, advantageously at least 5.5% by weight, advantageously at least 5.6% by weight,
- the alginate content is between 3% and 10% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the alginate content is between 3.5% and 9.5% by weight, advantageously between 4.0% and 9.0% by weight, advantageously between 4.5 and 8.5% by weight, advantageously between 5.0% and 8.0% by weight, advantageously between 5.5% and 7.5% by weight, advantageously between 6.0% and 7.5% by weight, advantageously between 6.5% and 7.5 % by weight, advantageously between 6.1% and 7.5% by weight, advantageously between 6.2% and 7.5% by weight, advantageously between 6.3% and 7.5% by weight, advantageously between 6, 4% and 7.5% by weight, advantageously between 6.5% and 7.5% by weight, advantageously between 6.6% and 7.5% by weight, advantageously between 6.7% and 7.5% by weight, advantageously between 6.8% and 7.5% by weight, advantageously between 6.9% and 7.5% by weight, advantageously between 7.0% and 7.5% by weight, advantageously between 7.0% and 7.4% by weight, advantageously between 7.0% and 7.3% by weight,
- the alginate content is between 7.0% and 7.2% by weight relative to the total weight of the dry matter contained in the paper pulp. In a particularly advantageous embodiment of the invention, the alginate content is 7.1% by weight relative to the total weight of the dry matter contained in the paper pulp. According to another embodiment of the invention, the alginate content is less than 3% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the alginate content is less than 2.9% by weight, advantageously less than 2.8%, advantageously less than 2.7%, advantageously less than 2.6%, advantageously less than 2.5%, advantageously less to 2.4%, advantageously less than 2.3%, advantageously less than 2.2%, advantageously less than 2.1%, advantageously less than 2.0%, advantageously less than 1.9%, advantageously less than 1 8%, advantageously less than 1.7%, advantageously less than 1.6%, advantageously less than 1.5%, advantageously less than 1.4%, advantageously less than 1.3%, advantageously less than 1.2 %, advantageously less than 1.1%, advantageously less than 1.0%, advantageously less than 0.9%, advantageously less than 0.8%, advantageously less than 0.7%, advantageously less than 0.6%, advantageously less than 0.5%, advantageously less than 0.4%, advantageously less than 0.3%, advantageously less less than 0.2%, advantageously less than 0.1% relative to the total weight of the dry matter contained in the paper pulp.
- the paper pulp is devoid of alginates.
- the non-cellulosic polysaccharides of the paper pulp of the invention comprise a mixture of fucoidan and alginates.
- non-cellulosic polysaccharides of the paper pulp of the invention comprise:
- non-cellulosic polysaccharides of the paper pulp of the invention comprise:
- non-cellulosic polysaccharides of the paper pulp of the invention comprise:
- alginates between 5% and 10.0% by weight of alginates, advantageously between 6.0% and 7.5% by weight of alginates, advantageously 7.1% by weight, each percentage being expressed by weight relative to the weight total dry matter contained in the pulp.
- non-cellulosic polysaccharides of the paper pulp of the invention contain:
- non-cellulosic polysaccharides of the paper pulp of the invention contain:
- non-cellulosic polysaccharides of the paper pulp of the invention contain:
- non-cellulosic polysaccharides of the paper pulp of the invention comprise only fucoidan.
- the distribution of monosaccharides comprises:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention comprises:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention comprises:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention comprises:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- the paper pulp is devoid of mannitol.
- free of mannitol means that the paper pulp of the invention does not contain mannitol or that it is present in a negligible quantity.
- the mannitol content is less than 1.0% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the mannitol content is less than or equal to 1.0% by weight, advantageously less than or equal to 0.9% by weight, advantageously less than or equal to 0.8% by weight, advantageously less than or equal to 0.7 % by weight, advantageously less than or equal to 0.6% by weight, advantageously less than or equal to 0.5% by weight, advantageously less than or equal to 0.4% by weight, advantageously less than or equal to 0.3% by weight, advantageously less than or equal to 0.2% by weight, advantageously less than or equal to 0.1% by weight relative to the total weight of the dry matter contained in the paper pulp.
- cellulosic polysaccharide means any polysaccharide having in its structure sequences of glucose residues united by alpha-1,4 bonds.
- the cellulosic polysaccharides of the invention can be chosen from unsubstituted celluloses, including in a microcrystalline form, and cellulose ethers. Among these cellulosic polysaccharides, cellulose ethers, cellulose esters and cellulose ether esters are distinguished.
- cellulose esters there are inorganic cellulose esters (nitrates, sulphates or phosphates of cellulose, etc.), organic cellulose esters (monoacetates, triacetates, aminopropionates, acetatebutyrates, acetatepropionates or acetatetrimellitates of cellulose, etc.) and mixed organic/inorganic cellulose esters such as cellulose acetatebutyratesulphates and cellulose acetatepropionatesulphates.
- cellulose ether esters mention may be made of hydroxypropylmethylcellulose phthalates and ethylcellulose sulphates.
- the cellulosic polysaccharide content of the paper pulp according to the invention is at least 8% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the cellulosic polysaccharide content of the paper pulp according to the invention is at least 8.5% by weight, advantageously at least 9.0% by weight, advantageously at least 9.5% by weight, advantageously at least 10.0% by weight, advantageously at least 10.5% by weight, advantageously at least 11.0% by weight, advantageously at least 11.5% by weight, advantageously at least 12.0% by weight, advantageously at least 12.5% by weight, advantageously at least 13% by weight, advantageously at least 13.5% by weight, advantageously at least 14.0% by weight, advantageously at least 14.5% by weight, advantageously at least 15 % by weight, advantageously at least 15.5% by weight, advantageously at least 16% by weight, advantageously at least 16.5% by weight, advantageously at least 17% by weight, advantageously at least 17.5% by weight, advantageously at least 18% by weight, advantageously at least 18.
- the content of cellulosic polysaccharides in the paper pulp according to the invention is between 8.0% and 30.0% by total weight of the dry matter contained in the paper pulp.
- the content of non-cellulosic polysaccharides of the paper pulp according to the invention is between 8.0% and 25.0% by weight, advantageously between 8.0% and 20.0% by weight, advantageously between 8. 0% and 15.0% by weight, advantageously between 8.0% and 12.0% by weight, advantageously between 8.5% and 11.5% by weight, advantageously between 9.0% and 11.0% by weight relative to the total weight of the dry matter contained in the pulp.
- the content of non-cellulosic polysaccharides of the paper pulp according to the invention is between 9.5% and 10.5% by weight relative to the total weight of the dry matter. contained in the paper pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is 10% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the paper pulp according to the invention is obtained from brown algae, advantageously brown algae of the genus Sargassum.
- the brown algae of the genus Sargassum is chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species.
- the paper pulp according to the invention is obtained from only brown algae of the species Sargassum fluitans.
- the paper pulp according to the invention is obtained from only brown algae of the species Sargassum natans.
- the paper pulp according to the invention is obtained from a mixture of brown algae of the species Sargassum fluitans and of the species Sargassum natans.
- the ratio between the Sargassum natans species and Sargassum fluitans in the mixture is 1:99, advantageously 2:98, advantageously 3:97, advantageously 4:96, advantageously 5:95, advantageously 6:94, advantageously 7:93, advantageously 8:92, advantageously 9: 91, advantageously 10:90, advantageously 11:89, advantageously 12:88, advantageously 13:87, advantageously 14:86, advantageously 15:85, advantageously 16:84, advantageously 17:83, advantageously 18:82, advantageously 19: 81, advantageously 20:80, advantageously 21:79, advantageously 22:78, advantageously 23:77, advantageously 24:76, advantageously 25:75, advantageously 26:74, advantageously 27:73, advantageously 28:72, advantageously 29: 71, advantageously 30:70, advantageously ent 31:69
- the ratio Sargassum natans: Sargassum fluitans in the mixture is chosen from: 1:99, 2:98, 3:97, 4:96, 5:95 , 6:94, 7:93, 8:92, 9:91, 10:90, 11:89, 12:88, 13:87, 14:86, 15:85, 16:84, 17:83, 18 :82, 19:81, 20:80, 21:79, 22:78, 23:77, 24:76, 25:75, 26:74, 27:73, 28:72, 29:71, 30:70 , 31:69, 32:68, 33:67, 34:66, 35:65, 36:64, 37:63, 38:62, 39:61, 40:60, 41:59, 42:58,
- the paper pulp comprises:
- the paper pulp further comprises a monosaccharide content is between 7.0% and 14.0% by weight, advantageously between 7.0% and 13.5% by weight, advantageously between 7.0% and 13.0% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the paper pulp comprises:
- the paper pulp comprises:
- the paper pulp comprises:
- the paper pulp contains:
- the paper pulp contains:
- the paper pulp also contains a monosaccharide content is between 7.0% and 14.0% by weight, advantageously between 7.0% and 13.5% by weight, advantageously between 7.0% and 13.0% by weight relative to the total weight of the dry matter contained in the paper pulp.
- the paper pulp contains:
- the paper pulp contains:
- the paper pulp contains a mineral matter content of 55% by weight
- the paper pulp according to the invention may also comprise cellulose fibers derived from wood and/or plants.
- plants that can be used include: hemp, Indian hemp, jute, kenaf, barrel creeper, flax, nettles, papyrus, ramie, esparto, linden, abaca, pineapple, henequen, mother-in-law's tongue, phormium, sisal, yucca, milkweed, coir, cotton, kapok, loofah, bamboo, straw wheat, rice straw, reed, bagasse, eelgrass, the list not being exhaustive.
- the addition of cellulose fibers to the paper pulp according to the invention makes it possible to reinforce the network of fibers of the paper pulp and thus these mechanical properties.
- the content of cellulose fibers derived from wood and/or plants is less than or equal to 15% by weight relative to the total weight of the paper pulp.
- the content of cellulose fibers from wood and/or plants is less than or equal to 14% by weight, advantageously less than or equal to 13% by weight, advantageously less than or equal to 12% by weight, advantageously less than or equal to 11% weight, advantageously less than or equal to 10% weight, advantageously less than or equal to 9% weight, advantageously less than or equal to 8% weight, advantageously less than or equal to 7% weight, advantageously less than or equal to 6% weight, advantageously less than or equal to 5% by weight, advantageously less than or equal to 4% by weight, advantageously less than or equal to 3% by weight, advantageously less than or equal to 2% by weight, advantageously less than or equal to 1% by weight relative to the total weight of the dough paper.
- the process for manufacturing a paper pulp from brown algae comprises the following steps: a) harvesting the brown algae, b) treating the brown algae with an alkaline agent, c) heating the mixture from step b) at a temperature and for a predefined time, d) mixing the mixture resulting from step c), in order to obtain an algae paste, e) filtering and recovering the algae paste.
- the brown algae are brown algae of the Sargassum genus.
- the brown algae of the genus Sargassum is chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species.
- the brown algae from step a) are harvested on the beach, by the sea or directly from the sea.
- the brown algae are harvested directly from the sea, which avoids rinse to remove any sand they may contain.
- step b) relates to the treatment of the brown algae harvested beforehand with an alkaline agent.
- the alkaline agent is chosen from sodium hydroxide, sodium hydroxide solution, potassium hydroxide, sodium carbonate, potassium carbonate, the list not being exhaustive.
- the alkaline agent can be dissolved in fresh water or in sea water, prior to its use.
- the treatment of the brown algae is carried out using a predefined concentration of alkaline agent and for a predefined duration.
- the concentration of alkaline agent is at least 15.00 grams per liter of water, advantageously at least 15.25 grams per liter of water, advantageously at least 15.50 grams per liter of water, advantageously at least 15.75 grams per liter of water, advantageously at least 16.00 grams per liter of water, advantageously at least 16.25 grams per liter of water, advantageously at least 16.50 grams per liter of water, advantageously at least 16.75 grams per liter of water, advantageously at least 17.00 grams per liter of water, advantageously at least 17.25 grams per liter of water, advantageously at least 17.50 grams per liter of water, advantageously at least 17.75 grams per liter of water, advantageously at least 18.00 grams per liter of water, advantageously at least 18.25 grams per liter of water, advantageously at least 18.50 grams per liter of water, advantageously at least 18.75 grams per liter of water, advantageously at least 19.00 grams per liter of water, preferably at least 19.25 grams per liter of water, preferably at least 19.50 grams per liter of water, advantageous
- the duration of the treatment with the alkaline agent is at least 30 minutes, advantageously at least 45 minutes, advantageously at least 60 minutes, advantageously at least 75 minutes, advantageously at least 90 minutes, advantageously at least 105 minutes, advantageously at least 120 minutes, advantageously at least 135 minutes, advantageously at least 150 minutes, advantageously at least 165 minutes, advantageously at least 180 minutes, advantageously at least 195 minutes, advantageously at least 210 minutes, advantageously at least 225 minutes, advantageously at least 240 minutes.
- the duration of the treatment with the alkaline agent is 120 minutes.
- step c) relates to the heating of the mixture from step b) to a temperature and for a predefined duration.
- the mixture of step b) is heated to a temperature of at least
- the heating temperature is less than 100°C.
- the mixture obtained in step b) is placed at a temperature of between 40°C and 80°C, advantageously at a temperature of between 40°C and 60°C, advantageously at a temperature of 40°C.
- the mixture obtained in step b) is placed at a temperature of between 40° C. and 80° C. for 10 minutes to 3 hours, advantageously for 15 minutes to 2 hours, advantageously for 30 minutes to 2 hours, advantageously for 1 at 2 o'clock.
- the step of heating the mixture (step b)) is carried out at a temperature of 40° C. for 2 hours.
- step c) the mixture is mixed, in order to obtain an algae paste.
- step d) is carried out using a grinder.
- the crusher can be chosen from a knife crusher, a pin crusher, a hammer crusher, a disc crusher, a grinding wheel crusher, the list not being exhaustive.
- step d) is carried out using a shredder or even using a refiner.
- the seaweed paste from step d) is then filtered (step e), in order to remove the water contained in said seaweed paste, then the seaweed paste is recovered.
- the filtration step (step e)) is carried out by manual pressing using a dry cloth. This step eliminates the water contained in the seaweed and concentrates the cellulose fibers in the seaweed paste.
- the filtration step can be carried out using a sieve or a filter cloth.
- the filtration step can be carried out by pressing using a screw press (of the twin-screw type for example) or a filter press. The pressing can be carried out at room temperature or at higher temperature. Chemical treatment is possible during or before pressing.
- the seaweed paste obtained in step e) is then rinsed with fresh water or sea water, advantageously with sea water, then resting for at least 15 minutes, advantageously at least 30 minutes, advantageously at least 45
- This step eliminates the excess alkaline compound from the cooking step and rinses some of the soluble minerals and metabolites that have remained trapped in the dough. It also helps to reduce the coloring of the dough. Finally, it reduces the alkalinity of the pulp and improves its conservation and that of the mechanical properties of the paper.
- the process for manufacturing the paper pulp may also comprise a step of bleaching or total discoloration of the paper pulp, advantageously at the end of step e).
- the stage of bleaching or total discoloration of the paper pulp obtained according to the method of the invention is carried out by adding to the seaweed pulp a bleaching product, said bleaching product being chosen from sodium hypochlorite , hydrogen peroxide, sodium hydroxide, chelating agents, citric acid or ozone, or by treating it enzymatically with chlorophyllases or carotenases, the list not being exhaustive , or by cooking in a basic medium.
- a solution of sodium hypochlorite can be added to the pulp at the rate of 1% active chlorine based on the dry weight of the pulp.
- the whitening of the paper pulp can be obtained by heating it (cooking) in the presence of sodium hydroxide, at a temperature of between 60 and 90°C, advantageously between 70 and 80°C.
- the paper pulp can also be placed in the presence of sodium hydroxide, chelating agents (for example EDTA) and citric acid under normal temperature conditions.
- the bleaching of paper pulp can be obtained by adding three components to the pulp: an acid, an enzyme and a dispersing agent such as a surfactant.
- the acid and the enzyme serve to destroy the natural dyes of the algae and the dispersing agent prevents the sedimentation of these dyes.
- the process for manufacturing the paper pulp may further comprise a step of treating the paper pulp with a view to removing or masking its odor, for example by adding particles porous absorbing this odor or odorous molecules, such as synthetic vanilla (eg vanillin). It is in fact preferable to remove or mask the natural iodized odor of the algae which could persist in the paper, because this odor can be particularly unpleasant, in particular when a large quantity of paper simultaneously releases effluvia, for example during its unpacking by a printer, or during the printing of the paper.
- a view to removing or masking its odor for example by adding particles porous absorbing this odor or odorous molecules, such as synthetic vanilla (eg vanillin). It is in fact preferable to remove or mask the natural iodized odor of the algae which could persist in the paper, because this odor can be particularly unpleasant, in particular when a large quantity of paper simultaneously releases effluvia, for example during its unpacking by a printer, or during the printing of the paper.
- the porous particles can be particles of activated carbon, porous silica, diatomaceous earth, allophane, zeolite or any other particles with high specific surface areas, which are mixed with the paper pulp, for example at a rate of 0.01 at 5% by weight relative to the dry weight of the seaweed paste. These porous particles preferably have a relatively large specific surface.
- the particles of activated carbon, porous silica, diatomaceous earth, allophane or zeolite can also be added to the seaweed paste during a preliminary stage, then removed by sieving. This makes it possible not to find these particles in the final paper.
- the process for manufacturing the paper pulp may further comprise, after step e), a step consisting in adding cellulose fibers from wood and/or plants to the pulp to paper according to the invention.
- Another aspect of the invention relates to a process for the manufacture of paper from a paste of seaweed prepared according to the process described above, characterized in that it comprises the steps consisting in: a) mixing the paste with paper to water, in order to obtain a diluted paper pulp, b) spread the diluted paper pulp on a sieve, c) drain the diluted paper pulp, and d) allow the diluted paper pulp to dry, and recover the sheet of paper thus formed.
- step a) of the process for manufacturing paper from an algae pulp consists in mixing the paper pulp with water, in order to obtain a diluted paper pulp.
- the water used is fresh water or sea water or a mixture of the two.
- the water used is sea water.
- the water used is fresh water.
- the water used is a mixture of sea water and fresh water.
- step a) of the process uses a mixture of seawater and freshwater
- the ratio between seawater sea and fresh water in the mixture is 1:99, advantageously 2:98, advantageously 3:97, advantageously 4:96, advantageously 5:95, advantageously 6:94, advantageously 7:93, advantageously 8:92, advantageously 9:91, advantageously 10:90, advantageously 11:89, advantageously 12:88, advantageously 13:87, advantageously 14:86, advantageously 15:85, advantageously 16:84, advantageously 17:83, advantageously 18:82, advantageously 19:81, advantageously 20:80, advantageously 21:79, advantageously 22:78, advantageously 23:77, advantageously 24:76, advantageously 25:75, advantageously 26:74, advantageously 27:73, advantageously 28:72, advantageously 29:71, advantageously 30:70, advantageously 31:69, advantageously 32:68, advantageously 33:67, advantageously 34:66, advantageously 35:65, advantageously 36:64, advantageously 37:63, advantageously
- the ratio of sea water: fresh water in the mixture is chosen from : 1:99, 2:98, 3:97, 4:96, 5:95, 6:94, 7:93, 8:92, 9:91, 10:90, 11:89, 12:88, 13:87, 14:86, 15:85, 16:84, 17:83, 18:82, 19:81, 20: 80, 21:79, 22:78, 23:77, 24:76, 25:75, 26:74, 27:73, 28:72, 29:71, 30:70, 31:69, 32:68, 33:67, 34:66, 35:65, 36:64, 37:63, 38:62, 39:61, 40:60, 41:59, 42:58, 43:57, 44:56, 45: 55, 46:54, 47:53,
- the dilution is carried out using a pulp:water ratio of at least 1:1 (vol/vol), advantageously 1:2, advantageously 1:3, advantageously 1 :4, advantageously 1:5, advantageously 1:6, advantageously 1:7, advantageously 1:8, advantageously 1:9, advantageously 1:10 (vol/vol).
- step b) of the process for manufacturing paper from an algae pulp consists in distributing the diluted paper pulp on a sieve.
- the shape and the size of the sieve are chosen according to the shape and the dimension of the sheet of paper which one wishes to obtain.
- step c) of the process for manufacturing paper from an algae pulp consists in draining the diluted paper pulp.
- step c) is carried out for a period of at least 5 minutes, advantageously at least 6 minutes, advantageously at least 7 minutes, advantageously at least 8 minutes, advantageously at least 9 minutes, advantageously at least 10 minutes, in order to enable the water contained in the diluted paper pulp to be eliminated.
- this draining step can be carried out by a press, by suction, advantageously using a vacuum pump, or by gravity.
- a person skilled in the art will know how to adapt the press pressure according to the material to be drained.
- a person skilled in the art will know how to adapt the suction system, advantageously the vacuum pump, according to the material to be drained.
- step d) of the process for manufacturing paper from an algae paste consists in allowing the diluted paper paste to dry, and recovering the sheet of paper thus formed.
- this drying step can be carried out by drying in the open air or in an oven or by using drying on one or more drying cylinders or even by using a low-temperature oven.
- a person skilled in the art will know how to adapt the temperature of the oven or of the oven or of the drying cylinder(s) according to the material to be dried.
- the drying is carried out by drying in the open air, advantageously between 20° C. and 30° C., for at least 1 day, advantageously at least 2 days, advantageously for 3 days.
- Another aspect of the invention relates to the paper obtained by the method of manufacturing paper from a paste of seaweed according to the invention.
- the paper obtained by the process for manufacturing paper from an algae paste according to the invention comprises a mineral content of at least 20.0% by weight and an alginate content of less than 1 0.0% by weight, the percentages being expressed relative to the total weight of the dry matter of the paper.
- the paper is obtained from a paste of brown algae of the Sargassum genus, advantageously from brown algae of the Sargassum genus chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species.
- the paper obtained according to the process of the invention comprises:
- the content of non-cellulosic polysaccharides comprises a fucoidan content of at least 15.0% by weight and an alginate content is less than 1.0% by weight, the percentages being expressed relative to the total dry matter weight of the paper.
- the paper obtained according to the process of the invention comprises:
- the fucoidan content of the paper obtained according to the process of the invention is between 15.0% and 25.0% by weight, advantageously between 16.0% and 22.0%, advantageously between 16.2% and 21.7% by weight relative to the total weight of the dry matter of the paper.
- the monosaccharide content of the paper obtained according to the process of the invention is between 15.0% and 25.0% by weight, advantageously between 16.0% and 22.0%, advantageously between 18.0% and 21.0% by weight, advantageously 20.7% by weight relative to the total weight of the dry matter of the paper.
- the paper obtained according to the method of the invention comprises:
- the paper obtained according to the process of the invention contains: - a mineral matter content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 29.0% by weight,
- the paper obtained according to the method of the invention comprises:
- the paper obtained according to the process of the invention contains:
- the paper according to the invention can be a thin paper having a bulk greater than or equal to 1 cm 3 /g.
- the paper according to the invention can have a basis weight greater than 80 g/m 2 and an opacity greater than or equal to 95%.
- the paper according to the invention can have a basis weight greater than 90 g/m 2 , advantageously greater than 100 g/m 2 , advantageously greater than 110g/m 2 , advantageously greater than 120g/m 2 , advantageously greater than 130g/m 2 , advantageously greater than 140g/m 2 , advantageously greater than 150g/m 2 , advantageously greater than 160g/m 2 , advantageously greater than 170g/m 2 , advantageously greater than 180g/m 2 , advantageously greater than 190g/m 2 , advantageously greater than 200g/m 2 , advantageously greater than 210g/m 2 , advantageously greater than 220g/m 2 , advantageously greater than 230g/m m 2 , advantageously greater than 240g/m 2 , advantageously greater than 250g/m 2 , advantageously greater than 260g/m 2 , advantageously greater than 270g/m 2 , advantageously greater than 280g/m 2 , advantageously greater than 290g/m
- This paper can be used for printing, writing, brochure or packaging.
- Another aspect of the invention relates to the use of the paper pulp according to the invention for the preparation of a sheet of paper and/or cardboard.
- the paper pulp can be used for the preparation of papers for graphic use, such as newsprint, printing-writing papers such as for example notebooks, exercise books, books, magazines, copy paper, envelopes, tickets, cards, mail order catalogs, advertising materials, decorative papers, uncoated paper and coated paper, the list not being not limiting.
- printing-writing papers such as for example notebooks, exercise books, books, magazines, copy paper, envelopes, tickets, cards, mail order catalogs, advertising materials, decorative papers, uncoated paper and coated paper, the list not being not limiting.
- the paper pulp can be used for the preparation of paper and cardboard packaging, such as boxes, cases, bags, flexible packaging, displays, pastry boxes , cases for perfume, boxes for cigarettes, tubes or barrels for weight products, blisters, displays for distribution, food containers, non-food containers, the list not being exhaustive.
- Another aspect of the invention relates to the use of the paper pulp according to the invention for the preparation of all types of three-dimensional objects, in particular objects obtained by thermoforming, by molding, by stamping, the list not being exhaustive.
- Another aspect of the invention relates to the use of the paper pulp according to the invention for the preparation of all types of three-dimensional cellulose objects, in particular objects obtained by thermoforming, by molding, by stamping, the list no not being limiting.
- Brown algae of the genus Sargassum in particular of the species Sargassum natans and Sargassum fluitans are harvested directly from the sea.
- the algae are then treated with one and a half doses of soda crystals for 10 doses of water, then the mixture is cooked for 2 hours at a temperature of 60°C. Once the cooking is finished, the mixture is left to cool and then mix very finely. The mixture is then filtered through a cloth to collect the waterless seaweed paste. The seaweed paste is then rinsed twice with seawater, then left to rest for one hour.
- composition of monosaccharides and uronic acids was analyzed by HPLC after a controlled methanolysis step.
- the monosaccharide/uronic acid contents are given with a relative uncertainty of ⁇ 20% taking into account the reproducibility and repeatability of the analysis.
- the polysaccharide composition analysis results are then interpreted in order to trace the polysaccharide composition of the matrix and an estimate of the alginate (mannuronic + guluronic acid) and fucoidan contents.
- Table 1 Comparison of samples of dried algae and paper pulp according to the invention expressed on the dry matter LoD: detection limit ⁇ 0.1
- Example 2 Characterization of the paper according to the invention
- the paper pulp is mixed with water, in order to obtain a homogeneous diluted paper pulp.
- the diluted pulp is then spread over a sieve and then drained for 10 minutes to remove the water.
- the paste is then transferred to a felt cloth, then left to dry in the open air for 3 days and then gently removed from the sieve.
- composition of monosaccharides and uronic acids was analyzed by HPLC after a controlled methanolysis step.
- the monosaccharide/uronic acid contents are given with a relative uncertainty of ⁇ 20% taking into account the reproducibility and repeatability of the analysis.
- the polysaccharide composition analysis results are then interpreted in order to trace the polysaccharide composition of the matrix and an estimate of the alginate (mannuronic + guluronic acid) and fucoidan contents.
- the protein content was determined using the Kjeldahl method which makes it possible to determine the total nitrogen content in a sample.
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Abstract
The present invention relates to a paper pulp comprising: - a mineral material content of at least 30% by weight; - a non-cellulosic polysaccharide content of at least 10% by weight; and - a cellulosic polysaccharide content of at least 8% by weight; each percentage being expressed by weight with respect to the total weight of dry matter contained in the paper pulp. The present invention also relates to the method for manufacturing paper from this paper pulp and the uses thereof, in particular for manufacturing any type of three-dimensional object made of moulded cellulose.
Description
TITRE : PATE A PAPIER ET SES UTILISATIONS TITLE: PULP AND ITS USES
Domaine technique Technical area
La présente invention concerne une pâte à papier obtenue à partir d'algues brunes, ainsi que son procédé de préparation. La présente invention concerne également une composition papetière, un procédé de fabrication de papier à partir de la composition papetière et ses utilisations dans la fabrication du papier et/ou du carton. The present invention relates to a paper pulp obtained from brown algae, as well as its method of preparation. The present invention also relates to a paper composition, a process for manufacturing paper from the paper composition and its uses in the manufacture of paper and/or cardboard.
Art antérieur Prior art
La majeure partie du papier est produite par la transformation du bois en pâte. Pour sa part, le bois est constitué pour moitié environ de fibres de cellulose ; il est transformé en pâte par des procédés chimiques ou mécaniques : Most paper is produced by turning wood into pulp. For its part, wood is made up approximately half of cellulose fibers; it is transformed into paste by chemical or mechanical processes:
- la pâte chimique est obtenue en cuisant du bois en présence de sulfate ou de bisulfite; elle donnera des papiers à la fois les plus solides et les plus aptes au recyclage - chemical pulp is obtained by cooking wood in the presence of sulphate or bisulphite; it will give papers that are both the strongest and the most suitable for recycling
- pour ce qui est du traitement mécanique, il consiste à laminer le bois en fibres, donnant une pâte de moins bonne qualité. - as regards the mechanical treatment, it consists of laminating the wood into fibres, giving a pulp of lower quality.
Toutefois, l'utilisation de bois pour la fabrication de pâte à papier présente de nombreux inconvénients. En particulier, l'utilisation de bois peut contribuer à la déforestation et la sylviculture présente des impacts environnementaux sur la diversité ou la qualité des sols. Elle se positionne aussi dans un contexte d'occupation croissante des espaces terrestres par l'activité humaine. De plus, les agents de blanchiment utilisés, tels que le chlore, sont des substances très polluantes et toxiques pour la nature et leurs nouvelles alternatives présentent toujours un impact environnemental non négligeable. Par ailleurs, pour extraire la cellulose des fibres de bois, et lors des étapes de blanchiment, il est nécessaire d'utiliser des quantités très importantes d'eau. Pour finir, la production d'une feuille de papier à partir du bois nécessite environ 17 watts heures. Ainsi, la fabrication de papier à partir du bois est très polluante, consommatrice d'eau et d'énergie et peut contribuer à la déforestation et aux changements d'allocation des sols. However, the use of wood for the manufacture of paper pulp has many disadvantages. In particular, the use of wood can contribute to deforestation and forestry has environmental impacts on soil diversity or quality. It is also positioned in a context of increasing occupation of terrestrial spaces by human activity. In addition, the bleaching agents used, such as chlorine, are very polluting and toxic substances for nature and their new alternatives always present a significant environmental impact. Furthermore, to extract the cellulose from the wood fibres, and during the bleaching steps, it is necessary to use very large quantities of water. Finally, producing a sheet of paper from wood requires about 17 watt hours. Thus, the manufacture of paper from wood is very polluting, water and energy consuming and can contribute to deforestation and changes in land allocation.
Le document EP488486 décrit un procédé de production de pâte à papier, qui utilise, comme ingrédient de la pâte à papier, une algue appartenant au genre
Closterium ou au genre Pleurotaenium, contenant de la cellulose comme composant de sa paroi cellulaire, qui présente un long corps d'algue, et dont le rapport de la longueur du corps à la largeur du corps est de 10 à 200. Toutefois, pour obtenir la pâte à papier à partir de ces algues, l'utilisation d'agents de blanchiment tels que le chlore ou l'ozone est nécessaire. The document EP488486 describes a process for the production of paper pulp, which uses, as an ingredient of the paper pulp, an algae belonging to the genus Closterium or genus Pleurotaenium, containing cellulose as a component of its cell wall, which has a long algal body, and whose ratio of body length to body width is 10 to 200. However, to obtain pulp from these algae, the use of bleaching agents such as chlorine or ozone is necessary.
Par conséquent, il apparait nécessaire de disposer d'un matériau permettant de fabriquer du papier de manière simple, efficace, économique, tout en étant respectueux de l'environnement et dont l'emprise sur les espaces terrestres est limitée. Consequently, it appears necessary to have a material which makes it possible to manufacture paper in a simple, efficient and economical manner, while being respectful of the environment and whose influence on terrestrial spaces is limited.
Description détaillée de l'invention Detailed description of the invention
La Demanderesse de la présente invention propose donc une nouvelle pâte à papier, riche en matière minérale et en polysaccharides non cellulosiques. The Applicant of the present invention therefore proposes a new paper pulp, rich in mineral matter and in non-cellulosic polysaccharides.
Ainsi, la présente invention concerne une pâte à papier comprenant : Thus, the present invention relates to a paper pulp comprising:
- une teneur en matière minérale d'au moins 30% en poids, - a mineral content of at least 30% by weight,
- une teneur en polysaccharides non cellulosiques d'au moins 10% en poids, et- a content of non-cellulosic polysaccharides of at least 10% by weight, and
- une teneur en polysaccharide cellulosique d'au moins 8% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of at least 8% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Cette nouvelle pâte à papier permet d'obtenir un papier présentant des caractéristiques physico-chimiques avantageuses, tout en réduisant les coûts de production et en étant respectueux de l'environnement. This new paper pulp makes it possible to obtain a paper with advantageous physico-chemical characteristics, while reducing production costs and being environmentally friendly.
La présente invention fournit une solution simple, efficace et économique, qui permet de fabriquer un papier ayant une teneur en matière minérale issue d'algues relativement importante et ne requiert pas d'ajout des charges minérales d'origine minière ou chimique pour apporter opacité, moelleux et élasticité au papier. La présente invention ne présente pas ou pas significativement de marques ou inclusions foncées. The present invention provides a simple, effective and economical solution, which makes it possible to manufacture a paper having a relatively high content of mineral matter derived from algae and does not require the addition of mineral fillers of mining or chemical origin to provide opacity, softness and elasticity to paper. The present invention shows no or no significant dark marks or inclusions.
Au sens de la présente invention, on entend par « pâte à papier », une pâte destinée à être utilisée pour la préparation du papier. Within the meaning of the present invention, the term "paper pulp" means a pulp intended to be used for the preparation of paper.
Au sens de la présente invention, on entend par « matière minérale », une matière choisie parmi le groupe comprenant les chlorures, les sulfates, les
carbonates, et les contre-ions de ces composés et des polysaccharides ioniques, tels que le sodium (Na), le potassium (K), le calcium (Ca), le magnésium (Mg), le fer (Fe), l'iode (I), le cuivre (Cu), le zinc (Zn) et le sélénium (Se) et un mélange de celles-ci. Within the meaning of the present invention, the term "mineral material" means a material chosen from the group comprising chlorides, sulphates, carbonates, and the counterions of these compounds and ionic polysaccharides, such as sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), iodine (I), copper (Cu), zinc (Zn) and selenium (Se) and a mixture thereof.
Au sens de la présente invention, on entend par « teneur », la quantité ou la concentration d'un composé restant après séchage de la pâte à papier selon l'invention. Within the meaning of the present invention, the term “content” means the quantity or the concentration of a compound remaining after drying of the paper pulp according to the invention.
Avantageusement, la teneur en matière minérale de la pâte à papier selon l'invention est d'au moins 30% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en matière minérale de la pâte à papier selon l'invention est d'au moins 31% en poids, avantageusement au moins 32% en poids, avantageusement au moins 33% en poids, avantageusement au moins 34% en poids, avantageusement au moins 35% en poids, avantageusement au moins 36% en poids, avantageusement au moins 37% en poids, avantageusement au moins 38% en poids, avantageusement au moins 39% en poids, avantageusement au moins 40% en poids, avantageusement au moins 41% en poids, avantageusement au moins 42% en poids, avantageusement au moins 43% en poids, avantageusement au moins 44% en poids, avantageusement au moins 45% en poids, avantageusement au moins 46% en poids, avantageusement au moins 47% en poids, avantageusement au moins 48% en poids, avantageusement au moins 49% en poids, avantageusement au moins 50% en poids, avantageusement au moins 51% en poids, avantageusement au moins 52% en poids, avantageusement au moins 53% en poids, avantageusement au moins 54% en poids, avantageusement au moins 55% en poids, avantageusement au moins 56% en poids, avantageusement au moins 57% en poids, avantageusement au moins 58% en poids, avantageusement au moins 59% en poids, avantageusement au moins 60% en poids, avantageusement au moins 61% en poids, avantageusement au moins 62% en poids, avantageusement au moins 63% en poids, avantageusement au moins 64% en poids, avantageusement au moins 65% en poids, avantageusement au moins 66% en poids, avantageusement au moins 67% en poids, avantageusement au moins 68% en poids, avantageusement au moins 69% en poids, avantageusement au moins
70% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Advantageously, the mineral matter content of the paper pulp according to the invention is at least 30% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the mineral matter content of the paper pulp according to the invention is at least 31% by weight, advantageously at least 32% by weight, advantageously at least 33% by weight, advantageously at least 34% by weight, advantageously at least 35% by weight, advantageously at least 36% by weight, advantageously at least 37% by weight, advantageously at least 38% by weight, advantageously at least 39% by weight, advantageously at least 40% by weight, advantageously at least least 41% by weight, advantageously at least 42% by weight, advantageously at least 43% by weight, advantageously at least 44% by weight, advantageously at least 45% by weight, advantageously at least 46% by weight, advantageously at least 47 % by weight, advantageously at least 48% by weight, advantageously at least 49% by weight, advantageously at least 50% by weight, advantageously at least 51% by weight, advantageously at least 52% by weight, advantageously at least 53% by weight, advantageously at least 54% by weight, advantageously at least 55% by weight, advantageously at least 56% by weight, advantageously at least 57% by weight, advantageously at least 58% by weight, advantageously at least 59% by weight, advantageously at least 60% by weight , advantageously at least 61% by weight, advantageously at least 62% by weight, advantageously at least 63% by weight, advantageously at least 64% by weight, advantageously at least 65% by weight, advantageously at least 66% by weight, advantageously at least 67% by weight, advantageously at least 68% by weight, advantageously at least 69% by weight, advantageously at least 70% by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation de l'invention, la teneur en matière minérale de la pâte à papier selon l'invention est comprise entre 30% et 70% en poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en matière minérale de la pâte à papier selon l'invention est comprise entre 30% et 65% en poids, avantageusement entre 30% et 60% en poids, avantageusement entre 30% et 55% en poids, avantageusement entre 30% et 50% en poids, avantageusement entre 30% et 45% en poids, avantageusement entre 30% et 40% en poids en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. According to one embodiment of the invention, the mineral matter content of the paper pulp according to the invention is between 30% and 70% by total weight of the dry matter contained in the paper pulp. Advantageously, the content of mineral matter in the paper pulp according to the invention is between 30% and 65% by weight, advantageously between 30% and 60% by weight, advantageously between 30% and 55% by weight, advantageously between 30 % and 50% by weight, advantageously between 30% and 45% by weight, advantageously between 30% and 40% by weight by weight relative to the total weight of the dry matter contained in the paper pulp.
Au sens de la présente invention, on entend par « monosaccharides », un aldose. Il peut s'agir notamment de l'arabinose, du xylose, du mannose, du rhamnose, du glucose, du galactose, de l'arabinose, du fructose. Les monosaccharides selon l'invention peuvent être sous une forme D ou L. Within the meaning of the present invention, the term “monosaccharides” means an aldose. It may be in particular arabinose, xylose, mannose, rhamnose, glucose, galactose, arabinose, fructose. The monosaccharides according to the invention can be in a D or L form.
Au sens de la présente invention, on entend par « acides uroniques », un aldose dont un groupement alcool a été oxydé, Il peut s'agir notamment de l'acide iduronique, de l'acide galacturonique, de l'acide glucuronique, de l'acide mannuronique et de l'acide guluronique. Les acides uroniques selon l'invention peuvent être sous une forme D ou L. Within the meaning of the present invention, the term "uronic acids" means an aldose in which an alcohol group has been oxidized. It may be in particular iduronic acid, galacturonic acid, glucuronic acid, mannuronic acid and guluronic acid. The uronic acids according to the invention can be in a D or L form.
Au sens de la présente invention, on entend par « polyols », des monosaccharides dont la fonction aldéhyde a été réduite. Il s'agit tout particulièrement du mannitol dans le cadre de la présente invention. Within the meaning of the present invention, the term “polyols” means monosaccharides whose aldehyde function has been reduced. This is most particularly mannitol in the context of the present invention.
Au sens de la présente invention, on entend par « polysaccharides », tout polymère constitué de plusieurs monosaccharides ayant pour formule générale : -[Cx(H20)y)]n- (où y est généralement x - 1 ) et liés entre eux par des liaisons O-osidiques. Les polysaccharides peuvent également être constitués de plusieurs acides uroniques, ayant pour formule générale : -[Cx(H2)yOz)]n- (où y est généralement x - 1 et z est généralement x+1) et liés entre eux par des liaisons O-osidiques. Les polysaccharides peuvent être de structure linéaire ou ramifiée. Les polysaccharides comprennent notamment des sous-unités comprenant entre 5 et 6 atomes de carbone, tels que des sous-unités choisies dans un groupe
constitué de l'arabinose, du xylose, du mannose, du rhamnose, du glucose, du galactose, du fructose, de l'acide iduronique, de l'acide galacturonique, de l'acide glucuronique, de l'acide mannuronique et de l'acide guluronique, et du mannitol. Ces polysaccharides peuvent par ailleurs être substitués, notamment par des groupements sulfates. Les polysaccharides ont un poids moléculaire compris entre 5 kDa et 2000 kDa. Dans un mode de réalisation particulier, les polysaccharides ont un poids moléculaire compris environ 10 kDa et environ 800 kDa. Avantageusement, les polysaccharides selon l'invention peuvent être des polysaccharides cellulosiques et/ou des polysaccharides non cellulosiques. Within the meaning of the present invention, the term "polysaccharides" means any polymer consisting of several monosaccharides having the general formula: -[Cx(H 2 0)y)]n- (where y is generally x - 1) and bonded between them by O-osidic bonds. Polysaccharides can also consist of several uronic acids, having the general formula: -[Cx(H 2 )yOz)]n- (where y is generally x - 1 and z is generally x+1) and linked together by O-osidic bonds. Polysaccharides can be linear or branched in structure. The polysaccharides comprise in particular subunits comprising between 5 and 6 carbon atoms, such as subunits chosen from a group consisting of arabinose, xylose, mannose, rhamnose, glucose, galactose, fructose, iduronic acid, galacturonic acid, glucuronic acid, mannuronic acid and l guluronic acid, and mannitol. These polysaccharides can also be substituted, in particular by sulphate groups. Polysaccharides have a molecular weight between 5 kDa and 2000 kDa. In a particular embodiment, the polysaccharides have a molecular weight between about 10 kDa and about 800 kDa. Advantageously, the polysaccharides according to the invention can be cellulosic polysaccharides and/or non-cellulosic polysaccharides.
Au sens de la présente invention, on entend par « polysaccharides non cellulosiques», les polysaccharides qui ne sont pas majoritairement constitués d'unités glucose liées en position beta-(l,4) (« cellulose »). Within the meaning of the present invention, the term “non-cellulose polysaccharides” means polysaccharides which are not mainly constituted by glucose units linked in the beta-(1,4) position (“cellulose”).
Au sens de la présente invention, on entend par «alginates», les polysaccharides constitués d'acide guluronique et d'acide mannuronique. Within the meaning of the present invention, the term “alginates” means polysaccharides consisting of guluronic acid and mannuronic acid.
Au sens de la présente invention, on entend par «fucoïdanes», les polysaccharides complexes riches en fucose et comportant notamment comme monomères complémentaires, le mannose, le glucose, le xylose, l'arabinose, le rhamnose, et l'acide glucuronique. Ces polysaccharides sont aussi décorés par une grande diversité de substituants et peuvent notamment être sulfatés, méthylés, ou acétylés. Le fucoïdane peut inclure des fragments de fucoïdane générés par la dégradation (par exemple, l'hydrolyse) de molécules de fucoïdane plus grosses. La dégradation peut être obtenue par l'une quelconque des techniques connues de l'homme du métier, y compris le traitement du fucoïdane avec un acide, une base, la chaleur ou des enzymes pour donner du fucoïdane dégradé. Les fucoïdanes peuvent également être modifiés chimiquement et peuvent avoir des modifications, y compris, mais sans s'y limiter, la sulfatation, la polysulfatation, l'acétylation, l'estérification et la méthylation ainsi que la désulfatation, la désacétylation, ou la saponification. Within the meaning of the present invention, the term “fucoidans” means complex polysaccharides rich in fucose and comprising in particular, as complementary monomers, mannose, glucose, xylose, arabinose, rhamnose, and glucuronic acid. These polysaccharides are also decorated with a wide variety of substituents and may in particular be sulphated, methylated or acetylated. Fucoidan can include fucoidan fragments generated by the breakdown (eg, hydrolysis) of larger fucoidan molecules. Degradation can be achieved by any of the techniques known to those skilled in the art, including treating fucoidan with acid, base, heat or enzymes to yield degraded fucoidan. Fucoidans can also be chemically modified and may have modifications including, but not limited to, sulfation, polysulfation, acetylation, esterification, and methylation as well as desulfation, deacetylation, or saponification .
Au sens de la présente invention, on entend par « laminarine » un polysaccharide majoritairement composé d'unités glucose liées en alpha-(l,4), et pouvant présenter une fraction de mannitol.
Avantageusement, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est d'au moins 10% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est d'au moins 10,5% en poids, avantageusement au moins 11,0% en poids, avantageusement au moins 11,5% en poids, avantageusement au moins 12,0% en poids, avantageusement au moins 12,5% en poids, avantageusement au moins 13% en poids, avantageusement au moins 13,5% en poids, avantageusement au moins 14,0% en poids, avantageusement au moins 14,5% en poids, avantageusement au moins 15% en poids, avantageusement au moins 15,5% en poids, avantageusement au moins 16% en poids, avantageusement au moins 16,5% en poids, avantageusement au moins 17% en poids, avantageusement au moins 17,5% en poids, avantageusement au moins 18% en poids, avantageusement au moins 18,5% en poids, avantageusement au moins 19% en poids, avantageusement au moins 19,5% en poids, avantageusement au moins 20% en poids, avantageusement au moins 20,5% en poids, avantageusement au moins 21% en poids, avantageusement au moins 21,5% en poids, avantageusement au moins 22% en poids, avantageusement au moins 22,5% en poids, avantageusement au moins 23% en poids, avantageusement au moins 23,5% en poids, avantageusement au moins 24% en poids, avantageusement au moins 24,5% en poids, avantageusement au moins 25% en poids, avantageusement au moins 25,5% en poids, avantageusement au moins 26% en poids, avantageusement au moins 26,5 % en poids, avantageusement au moins 27% en poids, avantageusement au moins 27,5% en poids, avantageusement au moins 28% en poids, avantageusement au moins 28,5% en poids, avantageusement au moins 29% en poids, avantageusement au moins 29,5% en poids, avantageusement au moins 30% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Within the meaning of the present invention, the term “laminarin” is understood to mean a polysaccharide mainly composed of glucose units linked at alpha-(1,4), and which may have a mannitol fraction. Advantageously, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is at least 10% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is at least 10.5% by weight, advantageously at least 11.0% by weight, advantageously at least 11.5% by weight, advantageously at least 12.0% by weight, preferably at least 12.5% by weight, preferably at least 13% by weight, preferably at least 13.5% by weight, preferably at least 14.0% by weight, preferably at least 14.5% by weight, advantageously at least 15% by weight, advantageously at least 15.5% by weight, advantageously at least 16% by weight, advantageously at least 16.5% by weight, advantageously at least 17% by weight , advantageously at least 17.5% by weight, advantageously at least 18% by weight, advantageously at least 18.5% by weight, advantageously at least 19% by weight, advantageously at least 19.5% by weight, advantageously at least 20% by weight, advantageously at least 20.5% by weight, advantageously at least 21% by weight, advantageously at least ns 21.5% by weight, advantageously at least 22% by weight, advantageously at least 22.5% by weight, advantageously at least 23% by weight, advantageously at least 23.5% by weight, advantageously at least 24% by weight, advantageously at least 24.5% by weight, advantageously at least 25% by weight, advantageously at least 25.5% by weight, advantageously at least 26% by weight, advantageously at least 26.5% by weight, advantageously at least 27% by weight, advantageously at least 27.5% by weight, advantageously at least 28% by weight, advantageously at least 28.5% by weight, advantageously at least 29% by weight, advantageously at least 29.5% by weight, advantageously at least 30% by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation de l'invention, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est comprise entre 10% et 30% en poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est comprise entre 10% et 25% en poids, avantageusement entre 11% et 24% en poids, avantageusement entre 12% et
23% en poids, avantageusement entre 13% et 22% en poids, avantageusement entre 14% et 21% en poids, avantageusement entre 15% et 20% en poids, avantageusement entre 16% et 19% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Selon un mode de réalisation particulièrement avantageux de l'invention, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est comprise entre 16% et 18,9% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Selon un mode de réalisation particulièrement avantageux de l'invention, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est de 16% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Selon un mode de réalisation particulièrement avantageux de l'invention, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est de 19,8% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. According to one embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is between 10% and 30% by total weight of the dry matter contained in the paper pulp. Advantageously, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is between 10% and 25% by weight, advantageously between 11% and 24% by weight, advantageously between 12% and 23% by weight, advantageously between 13% and 22% by weight, advantageously between 14% and 21% by weight, advantageously between 15% and 20% by weight, advantageously between 16% and 19% by weight relative to the total weight of the dry matter contained in the pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides of the paper pulp according to the invention is between 16% and 18.9% by weight relative to the total weight of the dry matter contained in paper pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is 16% by weight relative to the total weight of the dry matter contained in the paper pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is 19.8% by weight relative to the total weight of the dry matter contained in the paper pulp. .
De par sa teneur en polysaccharides non cellulosiques, la pâte à papier selon l'invention présente de bonnes propriétés mécaniques de résistance et de pliabilité. De plus, les polysaccharides non cellulosiques jouent un rôle important dans l'opacité et l'occlusion du papier. Due to its content of non-cellulosic polysaccharides, the paper pulp according to the invention has good mechanical properties of strength and pliability. In addition, non-cellulosic polysaccharides play an important role in paper opacity and occlusion.
Dans un mode de réalisation particulier de l'invention, le polysaccharide non cellulosique peut-être choisi parmi le groupe comprenant, les alginates, les fucoïdanes, la laminarine ou un mélange de ceux-ci. Avantageusement, le polysaccharide non cellulosique peut donc être constitué d'un seul polysaccharide non cellulosique ou d'un mélange de polysaccharides non cellulosique. In a particular embodiment of the invention, the non-cellulosic polysaccharide may be chosen from the group comprising alginates, fucoidans, laminarin or a mixture thereof. Advantageously, the non-cellulosic polysaccharide can therefore consist of a single non-cellulosic polysaccharide or of a mixture of non-cellulosic polysaccharides.
Selon un mode de réalisation particulier, les polysaccharides non cellulosiques de la pâte à papier de l'invention comprennent du fucoïdane et des alginates, dont les teneurs respectives sont d'au moins 7,0% de fucoïdane et d'au moins 3,0% d'alginate en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. According to a particular embodiment, the non-cellulosic polysaccharides of the paper pulp of the invention comprise fucoidan and alginates, the respective contents of which are at least 7.0% fucoidan and at least 3.0 % of alginate by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulier, la teneur en fucoïdane contenue dans la pâte à papier est d'au moins 7% en poids et la teneur en alginates contenue dans la pâte à papier est d'au moins 3% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier.
Avantageusement, la teneur en fucoïdane est d'au moins 7% en poids, avantageusement au moins 7,1% en poids, avantageusement au moins 7,2% en poids, avantageusement au moins 7,3% en poids, avantageusement au moins 7,4% en poids, avantageusement au moins 7,5% en poids, avantageusement au moins 7,6% en poids, avantageusement au moins 7,7% en poids, avantageusement au moins 7,8% en poids, avantageusement au moins 7,9% en poids, avantageusement au moins 8,0% en poids, avantageusement au moins 8,1% en poids, avantageusement au moins 8,2% en poids, avantageusement au moins 8,3% en poids, avantageusement au moins 8,4% en poids, avantageusement au moins 8,5% en poids, avantageusement au moins 8,6% en poids, avantageusement au moins 8,7% en poids, avantageusement au moins 8,8% en poids, avantageusement au moins 8,9% en poids, avantageusement au moins 9,0% en poids, avantageusement au moins 9,1% en poids, avantageusement au moins 9,2% en poids, avantageusement au moins 9,3% en poids, avantageusement au moins 9,4% en poids, avantageusement au moins 9,5% en poids, avantageusement au moins 9,6% en poids, avantageusement au moins 9,7% en poids, avantageusement au moins 9,8% en poids, avantageusement au moins 9,9% en poids, avantageusement au moins 10,0% en poids, avantageusement au moins 10,1% en poids, avantageusement au moins 10,2% en poids, avantageusement au moins 10,3% en poids, avantageusement au moins 10,4% en poids, avantageusement au moins 10,5% en poids, avantageusement au moins 10,6% en poids, avantageusement au moins 10,7% en poids, avantageusement au moins 10,8% en poids, avantageusement au moins 10,9% en poids, avantageusement au moins 11,0% en poids, avantageusement au moins 11,1% en poids, avantageusement au moins 11,2% en poids, avantageusement au moins 11,3% en poids, avantageusement au moins 11,4% en poids, avantageusement au moins 11,5% en poids, avantageusement au moins 11,6% en poids, avantageusement au moins 11,7% en poids, avantageusement au moins 11,8% en poids, avantageusement au moins 11,9% en poids, avantageusement au moins 12,0% en poids, avantageusement au moins 12,1% en poids, avantageusement au moins 12,2% en poids, avantageusement au moins 12,3% en poids, avantageusement au moins 12,4% en poids, avantageusement au moins 12,5% en poids, avantageusement au moins 12,6% en poids, avantageusement au moins 12,7% en poids, avantageusement au moins 12,8% en poids,
avantageusement au moins 12,9% en poids, avantageusement au moins 13,0% en poids, avantageusement au moins 13,1% en poids, avantageusement au moins 13,2% en poids, avantageusement au moins 13,3% en poids, avantageusement au moins 13,4% en poids, avantageusement au moins 13,5% en poids, avantageusement au moins 13,6% en poids, avantageusement au moins 13,7% en poids, avantageusement au moins 13,8% en poids, avantageusement au moins 13,9% en poids, avantageusement au moins 14,0% en poids, avantageusement au moins 14,1% en poids, avantageusement au moins 14,2% en poids, avantageusement au moins 14,3% en poids, avantageusement au moins 14,4% en poids, avantageusement au moins 14,5% en poids, avantageusement au moins 14,6% en poids, avantageusement au moins 14,7% en poids, avantageusement au moins 14,8% en poids, avantageusement au moins 14,9% en poids, avantageusement au moins 15,0% en poids, avantageusement au moins 15,1% en poids, avantageusement au moins 15,2% en poids, avantageusement au moins 15,3% en poids, avantageusement au moins 15,4% en poids, avantageusement au moins 15,5% en poids, avantageusement au moins 15,6% en poids, avantageusement au moins 15,7% en poids, avantageusement au moins 15,8% en poids, avantageusement au moins 15,9% en poids, avantageusement au moins 16,0% en poids, avantageusement au moins 16,1% en poids, avantageusement au moins 16,2% en poids, avantageusement au moins 16,3% en poids, avantageusement au moins 16,4% en poids, avantageusement au moins 16,5% en poids, avantageusement au moins 16,6% en poids, avantageusement au moins 16,7% en poids, avantageusement au moins 16,8% en poids, avantageusement au moins 16,9% en poids, avantageusement au moins 17,0% en poids, avantageusement au moins 17,1% en poids, avantageusement au moins 17,2% en poids, avantageusement au moins 17,3% en poids, avantageusement au moins 17,4% en poids, avantageusement au moins 17,5% en poids, avantageusement au moins 17,6% en poids, avantageusement au moins 17,7% en poids, avantageusement au moins 17,8% en poids, avantageusement au moins 17,9% en poids, avantageusement au moins 18,0% en poids, avantageusement au moins 18,1% en poids, avantageusement au moins 18,2% en poids, avantageusement au moins 18,3% en poids, avantageusement au moins 18,4% en poids, avantageusement au moins 18,5% en poids, avantageusement au moins 18,6% en poids, avantageusement au
moins 18,7% en poids, avantageusement au moins 18,8% en poids, avantageusement au moins 18,9% en poids, avantageusement au moins 19,0% en poids, avantageusement au moins 19,1% en poids, avantageusement au moins 19,2% en poids, avantageusement au moins 19,3% en poids, avantageusement au moins 19,4% en poids, avantageusement au moins 19,5% en poids, avantageusement au moins 19,6% en poids, avantageusement au moins 19,7% en poids, avantageusement au moins 19,8% en poids, avantageusement au moins 19,9% en poids, avantageusement au moins 20,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. According to a particular embodiment, the fucoidan content contained in the paper pulp is at least 7% by weight and the alginate content contained in the paper pulp is at least 3% by weight relative to the weight total dry matter contained in the pulp. Advantageously, the fucoidan content is at least 7% by weight, advantageously at least 7.1% by weight, advantageously at least 7.2% by weight, advantageously at least 7.3% by weight, advantageously at least 7 4% by weight, advantageously at least 7.5% by weight, advantageously at least 7.6% by weight, advantageously at least 7.7% by weight, advantageously at least 7.8% by weight, advantageously at least 7 9% by weight, advantageously at least 8.0% by weight, advantageously at least 8.1% by weight, advantageously at least 8.2% by weight, advantageously at least 8.3% by weight, advantageously at least 8 4% by weight, advantageously at least 8.5% by weight, advantageously at least 8.6% by weight, advantageously at least 8.7% by weight, advantageously at least 8.8% by weight, advantageously at least 8 9% by weight, advantageously at least 9.0% by weight, advantageously at least 9.1% by weight, advantageously at least 9.2% by weight, advantageously at least 9.3% by weight, advantageously ent at least 9.4% by weight, advantageously at least 9.5% by weight, advantageously at least 9.6% by weight, advantageously at least 9.7% by weight, advantageously at least 9.8% by weight, advantageously at least 9.9% by weight, advantageously at least 10.0% by weight, advantageously at least 10.1% by weight, advantageously at least 10.2% by weight, advantageously at least 10.3% by weight, advantageously at least 10.4% by weight, advantageously at least 10.5% by weight, advantageously at least 10.6% by weight, advantageously at least 10.7% by weight, advantageously at least 10.8% by weight, advantageously at least 10.9% by weight, advantageously at least 11.0% by weight, advantageously at least 11.1% by weight, advantageously at least 11.2% by weight, advantageously at least 11.3% by weight, advantageously at least 11.4% by weight, advantageously at least 11.5% by weight, advantageously at least 11.6% by weight, advantageously at least 11.7% by weight, advantageously at least 11.8% by weight, advantageously at least 11.9% by weight, advantageously at least 12.0% by weight, advantageously at least 12.1% by weight, advantageously at least 12.2% by weight, advantageously at least 12.3% by weight, advantageously at least 12.4% by weight, advantageously at least 12.5% by weight, advantageously at least 12.6% by weight, advantageously at least 12.7% by weight, advantageously at least 12.8% by weight, advantageously at least 12.9% by weight, advantageously at least 13.0% by weight, advantageously at least 13.1% by weight, advantageously at least 13.2% by weight, advantageously at least 13.3% by weight, advantageously at least 13.4% by weight, advantageously at least 13.5% by weight, advantageously at least 13.6% by weight, advantageously at least 13.7% by weight, advantageously at least 13.8% by weight, advantageously at least 13.9% by weight, advantageously at least 14.0% by weight, advantageously at least 14.1% by weight, advantageously at least 14.2% by weight, advantageously at least 14.3% by weight, advantageously at least 14.4% by weight, advantageously at least 14.5% by weight, advantageously at least 14.6% by weight, advantageously at least 14.7% by weight, advantageously at least 14.8% by weight, advantageously at least 14.9% by weight, advantageously at least 15.0% by weight, advantageously at least 15.1% by weight, advantageously at least 15.2% by weight, advantageously at least 15.3% by weight, advantageously at least 15.4% by weight, advantageously at least 15.5% by weight, advantageously at least 15.6% by weight, advantageously at least 15.7% by weight, advantageously at least 15.8% by weight, advantageously at least 15.9% by weight, advantageously at least 16.0% by weight, advantageously at least 16.1% by weight, advantageously at least 16.2% by weight, advantageously at least 16.3% by weight, advantageously at least 16.4% by weight, advantageously at least 16.5% by weight, advantageously at least 16.6% by weight, advantageously at least 16.7% by weight, advantageously at least 16.8% by weight, advantageously at least 16.9% by weight, advantageously at least 17.0% by weight, advantageously at least 17.1% by weight, advantageously at least 17.2% by weight, advantageously at least 17.3% by weight, advantageously at least 17.4% by weight, advantageously at least 17.5% by weight, advantageously at least 17.6% by weight, advantageously at least 17.7% e n weight, preferably at least 17.8% by weight, preferably at least 17.9% by weight, preferably at least 18.0% by weight, preferably at least 18.1% by weight, preferably at least 18.2% by weight, advantageously at least 18.3% by weight, advantageously at least 18.4% by weight, advantageously at least 18.5% by weight, advantageously at least 18.6% by weight, advantageously at least least 18.7% by weight, advantageously at least 18.8% by weight, advantageously at least 18.9% by weight, advantageously at least 19.0% by weight, advantageously at least 19.1% by weight, advantageously at least least 19.2% by weight, advantageously at least 19.3% by weight, advantageously at least 19.4% by weight, advantageously at least 19.5% by weight, advantageously at least 19.6% by weight, advantageously at least least 19.7% by weight, advantageously at least 19.8% by weight, advantageously at least 19.9% by weight, advantageously at least 20.0% by weight relative to the total weight of the dry matter contained in the dough to paper.
Selon un mode de réalisation de l'invention, la teneur en fucoïdane est comprise entre 7% et 20% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en fucoïdane est comprise entre 7,5% et 19,5% en poids, avantageusement entre 7 ,5% et 19,0% en poids, avantageusement entre 7,5% et 18,5% en poids, avantageusement entre 7 ,5% et 18,0% en poids, avantageusement entre 7,5% et 17,5% en poids, avantageusement entre 7 ,5% et 17,0% en poids, avantageusement entre 7,5% et 16,5% en poids, avantageusement entre 7 ,5% et 16,0% en poids, avantageusement entre 7,5% et 15,5% en poids, avantageusement entre 7 ,5% et 15,0% en poids, avantageusement entre 7,5% et 14,5% en poids, avantageusement entre 7 ,5% et 14,0% en poids, avantageusement entre 7,5% et 13,5% en poids, avantageusement entre 7 ,5% et 13,0% en poids, avantageusement entre 7,5% et 12,5% en poids, avantageusement entre 7 ,6% et 12,4% en poids, avantageusement entre 7,7% et 12,3% en poids, avantageusement entre 7 ,8% et 12,2% en poids, avantageusement entre 7,9% et 12,1% en poids, avantageusement entre 7 ,9% et 12,0% en poids, avantageusement entre 8,0% et 11,9% en poids, avantageusement entre 8,1% et 11,9% en poids, avantageusement entre 8,2% et 11,9% en poids, avantageusement entre 8,3% et 11,9% en poids, avantageusement entre 8,4% et 11,9% en poids, avantageusement entre 8,5% et 11,9% en poids, avantageusement entre 8,6% et 11,9% en poids, avantageusement entre 8,7% et 11,9% en poids, avantageusement entre 8,8% et 11,9% en poids, avantageusement entre 8,9% et 11,8% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Dans un mode
de réalisation particulièrement avantageux de l'invention, la teneur en fucoïdane est comprise entre 8,9% et 11,8% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. According to one embodiment of the invention, the fucoidan content is between 7% and 20% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the fucoidan content is between 7.5% and 19.5% by weight, advantageously between 7.5% and 19.0% by weight, advantageously between 7.5% and 18.5% by weight, advantageously between 7.5% and 18.0% by weight, advantageously between 7.5% and 17.5% by weight, advantageously between 7.5% and 17.0% by weight, advantageously between 7.5% and 16, 5% by weight, advantageously between 7.5% and 16.0% by weight, advantageously between 7.5% and 15.5% by weight, advantageously between 7.5% and 15.0% by weight, advantageously between 7 .5% and 14.5% by weight, advantageously between 7.5% and 14.0% by weight, advantageously between 7.5% and 13.5% by weight, advantageously between 7.5% and 13.0% by weight, advantageously between 7.5% and 12.5% by weight, advantageously between 7.6% and 12.4% by weight, advantageously between 7.7% and 12.3% by weight, advantageously between 7.8 % and 12.2% by weight, advantageously between 7.9% and 12.1% by weight, advantageously between 7.9% and 12.0% by weight, advantageously between 8.0% and 11, 9% by weight, advantageously between 8.1% and 11.9% by weight, advantageously between 8.2% and 11.9% by weight, advantageously between 8.3% and 11.9% by weight, advantageously between 8 4% and 11.9% by weight, advantageously between 8.5% and 11.9% by weight, advantageously between 8.6% and 11.9% by weight, advantageously between 8.7% and 11.9% by weight, advantageously between 8.8% and 11.9% by weight, advantageously between 8.9% and 11.8% by weight relative to the total weight of the dry matter contained in the paper pulp. In a mode particularly advantageous embodiment of the invention, the fucoidan content is between 8.9% and 11.8% by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la teneur en alginate est d'au moins 3% en poids, avantageusement au moins 3,1% en poids, avantageusement au moins 3,2% en poids, avantageusement au moins 3,3% en poids, avantageusement au moins 3,4% en poids, avantageusement au moins 3,5% en poids, avantageusement au moins 3,6% en poids, avantageusement au moins 3,7% en poids, avantageusement au moins 3,8% en poids, avantageusement au moins 3,9% en poids, avantageusement au moins 4,0% en poids, avantageusement au moins 4,1% en poids, avantageusement au moins 4,2% en poids, avantageusement au moins 4,3% en poids, avantageusement au moins 4,4% en poids, avantageusement au moins 4,5% en poids, avantageusement au moins 4,6% en poids, avantageusement au moins 4,7% en poids, avantageusement au moins 4,8% en poids, avantageusement au moins 4,9% en poids, avantageusement au moins 5,0% en poids, avantageusement au moins 5,1% en poids, avantageusement au moins 5,2% en poids, avantageusement au moins 5,3% en poids, avantageusement au moins 5,4% en poids, avantageusement au moins 5,5% en poids, avantageusement au moins 5,6% en poids, avantageusement au moins 5,7% en poids, avantageusement au moins 5,8% en poids, avantageusement au moins 5,9% en poids, avantageusement au moins 6,0% en poids, avantageusement au moins 6,1% en poids, avantageusement au moins 6,2% en poids, avantageusement au moins 6,3% en poids, avantageusement au moins 6,4% en poids, avantageusement au moins 6,5% en poids, avantageusement au moins 6,6% en poids, avantageusement au moins 6,7% en poids, avantageusement au moins 6,8% en poids, avantageusement au moins 6,9% en poids, avantageusement au moins 7,0% en poids, avantageusement au moins 7,1% en poids, avantageusement au moins 7,2% en poids, avantageusement au moins 7,3% en poids, avantageusement au moins 7,4% en poids, avantageusement au moins 7,5% en poids, avantageusement au moins 7,6% en poids, avantageusement au moins 7,7% en poids, avantageusement au moins 7,8% en poids, avantageusement au moins 7,9% en poids, avantageusement au moins 8,0% en poids, avantageusement au moins 8,1% en poids, avantageusement au moins 8,2% en poids, avantageusement au moins
8,3% en poids, avantageusement au moins 8,4% en poids, avantageusement au moins 8,5% en poids, avantageusement au moins 8,6% en poids, avantageusement au moins 8,7% en poids, avantageusement au moins 8,8% en poids, avantageusement au moins 8,9% en poids, avantageusement au moins 9,0% en poids, avantageusement au moins 9,1% en poids, avantageusement au moins 9,2% en poids, avantageusement au moins 9,3% en poids, avantageusement au moins 9,4% en poids, avantageusement au moins 9,5% en poids, avantageusement au moins 9,6% en poids, avantageusement au moins 9,7% en poids, avantageusement au moins 9,8% en poids, avantageusement au moins 9,9% en poids, avantageusement au moins 10,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Advantageously, the alginate content is at least 3% by weight, advantageously at least 3.1% by weight, advantageously at least 3.2% by weight, advantageously at least 3.3% by weight, advantageously at least 3 4% by weight, advantageously at least 3.5% by weight, advantageously at least 3.6% by weight, advantageously at least 3.7% by weight, advantageously at least 3.8% by weight, advantageously at least 3 9% by weight, advantageously at least 4.0% by weight, advantageously at least 4.1% by weight, advantageously at least 4.2% by weight, advantageously at least 4.3% by weight, advantageously at least 4 4% by weight, advantageously at least 4.5% by weight, advantageously at least 4.6% by weight, advantageously at least 4.7% by weight, advantageously at least 4.8% by weight, advantageously at least 4 9% by weight, advantageously at least 5.0% by weight, advantageously at least 5.1% by weight, advantageously at least 5.2% by weight, advantageously at least 5.3% by weight, advantageously nt at least 5.4% by weight, advantageously at least 5.5% by weight, advantageously at least 5.6% by weight, advantageously at least 5.7% by weight, advantageously at least 5.8% by weight, advantageously at least 5.9% by weight, advantageously at least 6.0% by weight, advantageously at least 6.1% by weight, advantageously at least 6.2% by weight, advantageously at least 6.3% by weight, advantageously at least 6.4% by weight, advantageously at least 6.5% by weight, advantageously at least 6.6% by weight, advantageously at least 6.7% by weight, advantageously at least 6.8% by weight, advantageously at least 6.9% by weight, advantageously at least 7.0% by weight, advantageously at least 7.1% by weight, advantageously at least 7.2% by weight, advantageously at least 7.3% by weight, advantageously at least 7.4% by weight, advantageously at least 7.5% by weight, advantageously at least 7.6% by weight, advantageously at least 7.7% by weight, advantageously at least 7.8% by weight, advantageously nt at least 7.9% by weight, advantageously at least 8.0% by weight, advantageously at least 8.1% by weight, advantageously at least 8.2% by weight, advantageously at least 8.3% by weight, advantageously at least 8.4% by weight, advantageously at least 8.5% by weight, advantageously at least 8.6% by weight, advantageously at least 8.7% by weight, advantageously at least 8.8% by weight, advantageously at least 8.9% by weight, advantageously at least 9.0% by weight, advantageously at least 9.1% by weight, advantageously at least 9.2% by weight, advantageously at least 9.3% by weight, advantageously at least 9.4% by weight, advantageously at least 9.5% by weight, advantageously at least 9.6% by weight, advantageously at least 9.7% by weight, advantageously at least 9.8% by weight, advantageously at least 9.9% by weight, advantageously at least 10.0% by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation de l'invention, la teneur en alginate est comprise entre 3% et 10% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en alginate est comprise entre 3,5% et 9,5% en poids, avantageusement entre 4,0% et 9,0% en poids, avantageusement entre 4,5 et 8,5% en poids, avantageusement entre 5,0% et 8,0% en poids, avantageusement entre 5,5% et 7,5% en poids, avantageusement entre 6,0% et 7,5% en poids, avantageusement entre 6,5% et 7,5% en poids, avantageusement entre 6 ,1% et 7,5% en poids, avantageusement entre 6,2% et 7,5% en poids, avantageusement entre 6 ,3% et 7,5% en poids, avantageusement entre 6,4% et 7,5% en poids, avantageusement entre 6 ,5% et 7,5% en poids, avantageusement entre 6,6% et 7,5% en poids, avantageusement entre 6 ,7% et 7,5% en poids, avantageusement entre 6,8% et 7,5% en poids, avantageusement entre 6 ,9% et 7,5% en poids, avantageusement entre 7,0% et 7,5% en poids, avantageusement entre 7 ,0% et 7,4% en poids, avantageusement entre 7,0% et 7,3% en poids, avantageusement entre 7,0% et 7,2% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Dans un mode de réalisation particulièrement avantageux de l'invention, la teneur en alginate est comprise entre 7,0% et 7,2% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Dans un mode de réalisation particulièrement avantageux de l'invention, la teneur en alginate est de 7,1% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier.
Selon un autre mode de réalisation de l'invention, la teneur en alginate est inférieure à 3% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en alginate est inférieure à 2,9% en poids, avantageusement inférieure à 2,8%, avantageusement inférieure à 2,7%, avantageusement inférieure à 2,6%, avantageusement inférieure à 2,5%, avantageusement inférieure à 2,4%, avantageusement inférieure à 2,3%, avantageusement inférieure à 2,2%, avantageusement inférieure à 2,1%, avantageusement inférieure à 2,0%, avantageusement inférieure a 1,9%, avantageusement inférieure à 1,8%, avantageusement inférieure à 1,7%, avantageusement inférieure à 1,6%, avantageusement inférieure à 1,5%, avantageusement inférieure à 1,4%, avantageusement inférieure à 1,3%, avantageusement inférieure à 1,2%, avantageusement inférieure à 1,1%, avantageusement inférieure à 1,0%, avantageusement inférieure à 0,9%, avantageusement inférieure à 0,8%, avantageusement inférieure à 0,7%, avantageusement inférieure à 0,6%, avantageusement inférieure à 0,5%, avantageusement inférieure à 0,4%, avantageusement inférieure à 0,3%, avantageusement inférieure à 0,2%, avantageusement inférieure à 0,1% par rapport au poids total de la matière sèche contenue dans la pâte à papier. Selon un mode de réalisation particulier, la pâte à papier est dépourvue d'alginates. Avantageusement, la teneur en alginates dans la pâte à papier est nulle. According to one embodiment of the invention, the alginate content is between 3% and 10% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the alginate content is between 3.5% and 9.5% by weight, advantageously between 4.0% and 9.0% by weight, advantageously between 4.5 and 8.5% by weight, advantageously between 5.0% and 8.0% by weight, advantageously between 5.5% and 7.5% by weight, advantageously between 6.0% and 7.5% by weight, advantageously between 6.5% and 7.5 % by weight, advantageously between 6.1% and 7.5% by weight, advantageously between 6.2% and 7.5% by weight, advantageously between 6.3% and 7.5% by weight, advantageously between 6, 4% and 7.5% by weight, advantageously between 6.5% and 7.5% by weight, advantageously between 6.6% and 7.5% by weight, advantageously between 6.7% and 7.5% by weight, advantageously between 6.8% and 7.5% by weight, advantageously between 6.9% and 7.5% by weight, advantageously between 7.0% and 7.5% by weight, advantageously between 7.0% and 7.4% by weight, advantageously between 7.0% and 7.3% by weight, advantageously between 7.0% and 7.2% by weight relative to the total weight of the dry matter contained in paper pulp. In a particularly advantageous embodiment of the invention, the alginate content is between 7.0% and 7.2% by weight relative to the total weight of the dry matter contained in the paper pulp. In a particularly advantageous embodiment of the invention, the alginate content is 7.1% by weight relative to the total weight of the dry matter contained in the paper pulp. According to another embodiment of the invention, the alginate content is less than 3% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the alginate content is less than 2.9% by weight, advantageously less than 2.8%, advantageously less than 2.7%, advantageously less than 2.6%, advantageously less than 2.5%, advantageously less to 2.4%, advantageously less than 2.3%, advantageously less than 2.2%, advantageously less than 2.1%, advantageously less than 2.0%, advantageously less than 1.9%, advantageously less than 1 8%, advantageously less than 1.7%, advantageously less than 1.6%, advantageously less than 1.5%, advantageously less than 1.4%, advantageously less than 1.3%, advantageously less than 1.2 %, advantageously less than 1.1%, advantageously less than 1.0%, advantageously less than 0.9%, advantageously less than 0.8%, advantageously less than 0.7%, advantageously less than 0.6%, advantageously less than 0.5%, advantageously less than 0.4%, advantageously less than 0.3%, advantageously less less than 0.2%, advantageously less than 0.1% relative to the total weight of the dry matter contained in the paper pulp. According to a particular embodiment, the paper pulp is devoid of alginates. Advantageously, the alginate content in the paper pulp is zero.
Selon un mode de réalisation particulier, les polysaccharides non cellulosiques de la pâte à papier de l'invention comprennent un mélange de fucoïdane et d'alginates. According to a particular embodiment, the non-cellulosic polysaccharides of the paper pulp of the invention comprise a mixture of fucoidan and alginates.
Selon un mode de réalisation particulier, les polysaccharides non cellulosiques de la pâte à papier de l'invention comprennent : According to a particular embodiment, the non-cellulosic polysaccharides of the paper pulp of the invention comprise:
- au moins 7,0% en poids de fucoïdane, et - at least 7.0% by weight of fucoidan, and
- au moins 3,0% en poids d'alginates, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 3.0% by weight of alginates, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, les polysaccharides non cellulosiques de la pâte à papier de l'invention comprennent : Advantageously, the non-cellulosic polysaccharides of the paper pulp of the invention comprise:
- au moins 8,0% en poids de fucoïdane, et - at least 8.0% by weight of fucoidan, and
- au moins 7,0% en poids d'alginates,
chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 7.0% by weight of alginates, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement , les polysaccharides non cellulosiques de la pâte à papier de l'invention comprennent : Advantageously, the non-cellulosic polysaccharides of the paper pulp of the invention comprise:
- entre 7,0% et 15,0% en poids de fucoïdane, avantageusement entre 8,0% et 12,0% en poids de fucoïdane, avantageusement entre 8,9% et 11,8% en poids, et - between 7.0% and 15.0% by weight of fucoidan, advantageously between 8.0% and 12.0% by weight of fucoidan, advantageously between 8.9% and 11.8% by weight, and
- entre 5% et 10,0% en poids d'alginates, avantageusement entre 6,0% et 7,5% en poids d'alginates, avantageusement 7,1% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - between 5% and 10.0% by weight of alginates, advantageously between 6.0% and 7.5% by weight of alginates, advantageously 7.1% by weight, each percentage being expressed by weight relative to the weight total dry matter contained in the pulp.
Selon un mode de réalisation particulier, les polysaccharides non cellulosiques de la pâte à papier de l'invention contiennent : According to a particular embodiment, the non-cellulosic polysaccharides of the paper pulp of the invention contain:
- au moins 7,0% en poids de fucoïdane, et - at least 7.0% by weight of fucoidan, and
- au moins 3,0% en poids d'alginates, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 3.0% by weight of alginates, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, les polysaccharides non cellulosiques de la pâte à papier de l'invention contiennent : Advantageously, the non-cellulosic polysaccharides of the paper pulp of the invention contain:
- au moins 8,0% en poids de fucoïdane, et - at least 8.0% by weight of fucoidan, and
- au moins 7,0% en poids d'alginates, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 7.0% by weight of alginates, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement , les polysaccharides non cellulosiques de la pâte à papier de l'invention contiennent : Advantageously, the non-cellulosic polysaccharides of the paper pulp of the invention contain:
- entre 7,0% et 15,0% en poids de fucoïdane, avantageusement entre 8,0% et 12,0% en poids de fucoïdane, avantageusement entre 8,9% et 11,8% en poids, et - between 7.0% and 15.0% by weight of fucoidan, advantageously between 8.0% and 12.0% by weight of fucoidan, advantageously between 8.9% and 11.8% by weight, and
- entre 5% et 10,0% en poids d'alginates, avantageusement entre 6,0% et 7,5% en poids d'alginates, avantageusement 7,1% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier.
Selon un autre mode de réalisation particulier, les polysaccharides non cellulosiques de la pâte à papier de l'invention comprennent uniquement du fucoïdane. - between 5% and 10.0% by weight of alginates, advantageously between 6.0% and 7.5% by weight of alginates, advantageously 7.1% by weight, each percentage being expressed by weight relative to the weight total dry matter contained in the pulp. According to another particular embodiment, the non-cellulosic polysaccharides of the paper pulp of the invention comprise only fucoidan.
Selon un mode de réalisation particulier, les inventeurs ont observé qu'après méthanolyse de la pâte à papier selon l'invention, la répartition des monosaccharides comprend : According to a particular embodiment, the inventors have observed that after methanolysis of the paper pulp according to the invention, the distribution of monosaccharides comprises:
- au moins 0,1% en poids de galactose, - at least 0.1% by weight of galactose,
- au moins 0,5% en poids de glucose, - at least 0.5% by weight of glucose,
- au moins 0,5% en poids de xylose, - at least 0.5% by weight of xylose,
- au moins 0,1% en poids de mannose, - at least 0.1% by weight of mannose,
- au moins 5,0 % en poids de fucose et - at least 5.0% by weight of fucose and
- au moins 0,8% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 0.8% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention comprend : Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention comprises:
- au moins 0,5% en poids de galactose, - at least 0.5% by weight of galactose,
- au moins 1,0% en poids de glucose, - at least 1.0% by weight of glucose,
- au moins 0,8% en poids de xylose, - at least 0.8% by weight of xylose,
- au moins 0,8% en poids de mannose, - at least 0.8% by weight of mannose,
- au moins 5,9% en poids de fucose et - at least 5.9% by weight of fucose and
- au moins 1,3% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 1.3% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement , la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention comprend: Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention comprises:
- entre 0,1% et 1,0% en poids de galactose, - between 0.1% and 1.0% by weight of galactose,
- entre 0,5% et 1,5% en poids de glucose, - between 0.5% and 1.5% by weight of glucose,
- entre 0,5% et 1,0% en poids de xylose, - between 0.5% and 1.0% by weight of xylose,
- entre 0,1% et 1,0% en poids de mannose, - between 0.1% and 1.0% by weight of mannose,
- entre 5,0% et 7,0% en poids de fucose, et - between 5.0% and 7.0% by weight of fucose, and
- entre 0,8% et 1,5% en poids d'acide glucuronique,
chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - between 0.8% and 1.5% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention comprend : Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention comprises:
- 0,5% en poids de galactose, - 0.5% by weight of galactose,
- 1,0% en poids de glucose, - 1.0% by weight of glucose,
- 0,8% en poids de xylose, - 0.8% by weight of xylose,
- 0,8% en poids de mannose, - 0.8% by weight of mannose,
- 5,9% en poids de fucose, et - 5.9% by weight of fucose, and
- 1,3% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - 1.3% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention contient : Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- au moins 0,2% en poids de galactose, - at least 0.2% by weight of galactose,
- au moins 0,5% en poids de glucose, - at least 0.5% by weight of glucose,
- au moins 0,5% en poids de xylose, - at least 0.5% by weight of xylose,
- au moins 0,5% en poids de mannose, - at least 0.5% by weight of mannose,
- au moins 5,0 % en poids de fucose et - at least 5.0% by weight of fucose and
- au moins 1,0% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - at least 1.0% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention contient : Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- au moins 0,5% en poids de galactose, - at least 0.5% by weight of galactose,
- au moins 1,0% en poids de glucose, - at least 1.0% by weight of glucose,
- au moins 0,8% en poids de xylose, - at least 0.8% by weight of xylose,
- au moins 0,8% en poids de mannose, - at least 0.8% by weight of mannose,
- au moins 5,9% en poids de fucose et - at least 5.9% by weight of fucose and
- au moins 1,3% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier.
Avantageusement, la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention contient : - at least 1.3% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- entre 0,1% et 1,0% en poids de galactose, - between 0.1% and 1.0% by weight of galactose,
- entre 0,5% et 1,5% en poids de glucose, - between 0.5% and 1.5% by weight of glucose,
- entre 0,5% et 1,0% en poids de xylose, - between 0.5% and 1.0% by weight of xylose,
- entre 0,1% et 1,0% en poids de mannose, - between 0.1% and 1.0% by weight of mannose,
- entre 5,0% et 7,0% en poids de fucose, et - between 5.0% and 7.0% by weight of fucose, and
- entre 0,8% et 1,5% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - between 0.8% and 1.5% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la répartition des monosaccharides après méthanolyse de la pâte à papier de l'invention contient : Advantageously, the distribution of monosaccharides after methanolysis of the paper pulp of the invention contains:
- 0,5% en poids de galactose, - 0.5% by weight of galactose,
- 1,0% en poids de glucose, - 1.0% by weight of glucose,
- 0,8% en poids de xylose, - 0.8% by weight of xylose,
- 0,8% en poids de mannose, - 0.8% by weight of mannose,
- 5,9% en poids de fucose, et - 5.9% by weight of fucose, and
- 1,3% en poids d'acide glucuronique, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - 1.3% by weight of glucuronic acid, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulier de l'invention, la pâte à papier est dépourvue de mannitol. Le terme « dépourvue de mannitol » signifie que la pâte à papier de l'invention ne contient pas de mannitol ou qu'il est présent en une quantité négligeable. Avantageusement, la teneur en mannitol est inférieure à 1,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en mannitol est inférieure ou égale à 1,0% en poids, avantageusement inférieure ou égale à 0,9% en poids, avantageusement inférieure ou égale à 0,8% en poids, avantageusement inférieure ou égale à 0,7% en poids, avantageusement inférieure ou égale à 0,6% en poids, avantageusement inférieure ou égale à 0,5% en poids, avantageusement inférieure ou égale à 0,4% en poids, avantageusement inférieure ou égale à 0,3% en poids, avantageusement inférieure ou égale à 0,2% en poids, avantageusement inférieure ou égale à 0,1% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier.
Au sens de la présente invention, on entend par « polysaccharide cellulosique », tout polysaccharide possédant dans sa structure des enchaînements de résidus glucose unis par des liaisons alpha-1,4. Ainsi, les polysaccharides cellulosiques de l'invention peuvent être choisis parmi les celluloses non substituées y compris sous une forme microcristalline et les éthers de cellulose. Parmi ces polysaccharides cellulosiques, on distingue les éthers de celluloses, les esters de celluloses et les esters éthers de celluloses. Parmi les esters de celluloses, on trouve les esters inorganiques de cellulose (nitrates, sulfates ou phosphates de cellulose..), les esters organiques de cellulose (monoacétates, triacétates, am idopropionates, acétatebutyrates, acétatepropionates ou acétatetrimellitates de cellulose..) et les esters mixtes organique/inorganique de cellulose tels que les acétatebutyratesulfates et les acétatepropionatesulfates de cellulose. Parmi les esters éthers de cellulose, on peut citer les phtalates d'hydroxypropylméthylcellulose et les sulftates d'éthylcellulose. According to a particular embodiment of the invention, the paper pulp is devoid of mannitol. The term "free of mannitol" means that the paper pulp of the invention does not contain mannitol or that it is present in a negligible quantity. Advantageously, the mannitol content is less than 1.0% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the mannitol content is less than or equal to 1.0% by weight, advantageously less than or equal to 0.9% by weight, advantageously less than or equal to 0.8% by weight, advantageously less than or equal to 0.7 % by weight, advantageously less than or equal to 0.6% by weight, advantageously less than or equal to 0.5% by weight, advantageously less than or equal to 0.4% by weight, advantageously less than or equal to 0.3% by weight, advantageously less than or equal to 0.2% by weight, advantageously less than or equal to 0.1% by weight relative to the total weight of the dry matter contained in the paper pulp. Within the meaning of the present invention, the term "cellulosic polysaccharide" means any polysaccharide having in its structure sequences of glucose residues united by alpha-1,4 bonds. Thus, the cellulosic polysaccharides of the invention can be chosen from unsubstituted celluloses, including in a microcrystalline form, and cellulose ethers. Among these cellulosic polysaccharides, cellulose ethers, cellulose esters and cellulose ether esters are distinguished. Among the cellulose esters, there are inorganic cellulose esters (nitrates, sulphates or phosphates of cellulose, etc.), organic cellulose esters (monoacetates, triacetates, aminopropionates, acetatebutyrates, acetatepropionates or acetatetrimellitates of cellulose, etc.) and mixed organic/inorganic cellulose esters such as cellulose acetatebutyratesulphates and cellulose acetatepropionatesulphates. Among the cellulose ether esters, mention may be made of hydroxypropylmethylcellulose phthalates and ethylcellulose sulphates.
Avantageusement, la teneur en polysaccharides cellulosiques de la pâte à papier selon l'invention est d'au moins 8% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en polysaccharides cellulosiques de la pâte à papier selon l'invention est d'au moins 8,5% en poids, avantageusement au moins 9,0% en poids, avantageusement au moins 9,5% en poids, avantageusement au moins 10,0% en poids, avantageusement au moins 10,5% en poids, avantageusement au moins 11,0% en poids, avantageusement au moins 11,5% en poids, avantageusement au moins 12,0% en poids, avantageusement au moins 12,5% en poids, avantageusement au moins 13% en poids, avantageusement au moins 13,5% en poids, avantageusement au moins 14,0% en poids, avantageusement au moins 14,5% en poids, avantageusement au moins 15% en poids, avantageusement au moins 15,5% en poids, avantageusement au moins 16% en poids, avantageusement au moins 16,5% en poids, avantageusement au moins 17% en poids, avantageusement au moins 17,5% en poids, avantageusement au moins 18% en poids, avantageusement au moins 18,5% en poids, avantageusement au moins 19% en poids, avantageusement au moins 19,5% en poids, avantageusement au moins 20% en poids, avantageusement au moins 20,5% en poids, avantageusement au moins 21% en poids, avantageusement au moins 21,5% en poids, avantageusement au moins 22% en poids, avantageusement au
moins 22,5% en poids, avantageusement au moins 23% en poids, avantageusement au moins 23,5% en poids, avantageusement au moins 24% en poids, avantageusement au moins 24,5% en poids, avantageusement au moins 25% en poids, avantageusement au moins 25,5% en poids, avantageusement au moins 26% en poids, avantageusement au moins 26,5 % en poids, avantageusement au moins 27% en poids, avantageusement au moins 27,5% en poids, avantageusement au moins 28% en poids, avantageusement au moins 28,5% en poids, avantageusement au moins 29% en poids, avantageusement au moins 29,5% en poids, avantageusement au moins 30% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Advantageously, the cellulosic polysaccharide content of the paper pulp according to the invention is at least 8% by weight relative to the total weight of the dry matter contained in the paper pulp. Advantageously, the cellulosic polysaccharide content of the paper pulp according to the invention is at least 8.5% by weight, advantageously at least 9.0% by weight, advantageously at least 9.5% by weight, advantageously at least least 10.0% by weight, advantageously at least 10.5% by weight, advantageously at least 11.0% by weight, advantageously at least 11.5% by weight, advantageously at least 12.0% by weight, advantageously at least least 12.5% by weight, advantageously at least 13% by weight, advantageously at least 13.5% by weight, advantageously at least 14.0% by weight, advantageously at least 14.5% by weight, advantageously at least 15 % by weight, advantageously at least 15.5% by weight, advantageously at least 16% by weight, advantageously at least 16.5% by weight, advantageously at least 17% by weight, advantageously at least 17.5% by weight, advantageously at least 18% by weight, advantageously at least 18.5% by weight, advantageously at least 19% by weight, advantageously at least 19.5% by weight, advantageously at least 20% by weight, advantageously at least 20.5% by weight, advantageously at least 21% by weight, advantageously at least 21.5% by weight, advantageously at least 22% by weight , advantageously to least 22.5% by weight, advantageously at least 23% by weight, advantageously at least 23.5% by weight, advantageously at least 24% by weight, advantageously at least 24.5% by weight, advantageously at least 25% by weight, advantageously at least 25.5% by weight, advantageously at least 26% by weight, advantageously at least 26.5% by weight, advantageously at least 27% by weight, advantageously at least 27.5% by weight, advantageously at least least 28% by weight, advantageously at least 28.5% by weight, advantageously at least 29% by weight, advantageously at least 29.5% by weight, advantageously at least 30% by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation de l'invention, la teneur en polysaccharides cellulosiques de la pâte à papier selon l'invention est comprise entre 8,0% et 30,0% en poids total de la matière sèche contenue dans la pâte à papier. Avantageusement, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est comprise entre 8,0% et 25,0% en poids, avantageusement entre 8,0% et 20,0% en poids, avantageusement entre 8,0% et 15,0% en poids, avantageusement entre 8,0% et 12,0% en poids, avantageusement entre 8,5% et 11,5% en poids, avantageusement entre 9,0% et 11,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Selon un mode de réalisation particulièrement avantageux de l'invention, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est comprise entre 9,5% et 10,5% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Selon un mode de réalisation particulièrement avantageux de l'invention, la teneur en polysaccharides non cellulosiques de la pâte à papier selon l'invention est de 10% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. According to one embodiment of the invention, the content of cellulosic polysaccharides in the paper pulp according to the invention is between 8.0% and 30.0% by total weight of the dry matter contained in the paper pulp. Advantageously, the content of non-cellulosic polysaccharides of the paper pulp according to the invention is between 8.0% and 25.0% by weight, advantageously between 8.0% and 20.0% by weight, advantageously between 8. 0% and 15.0% by weight, advantageously between 8.0% and 12.0% by weight, advantageously between 8.5% and 11.5% by weight, advantageously between 9.0% and 11.0% by weight relative to the total weight of the dry matter contained in the pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides of the paper pulp according to the invention is between 9.5% and 10.5% by weight relative to the total weight of the dry matter. contained in the paper pulp. According to a particularly advantageous embodiment of the invention, the content of non-cellulosic polysaccharides in the paper pulp according to the invention is 10% by weight relative to the total weight of the dry matter contained in the paper pulp.
Dans un mode de réalisation de l'invention, la pâte à papier selon l'invention est obtenue à partir d'algues brunes, avantageusement d'algues brunes du genre Sargassum. Selon un mode de réalisation particulier de l'invention, les algues brunes du genre Sargassum est choisi parmi les espèces Sargassum fluitans, Sargassum natans ou un mélange de ces deux espèces. Selon un mode de réalisation particulier, la pâte à papier selon l'invention est obtenue à partir uniquement d'algues brunes de l'espèce Sargassum fluitans. Selon un autre
mode de réalisation particulier, la pâte à papier selon l'invention est obtenue à partir uniquement d'algues brunes de l'espèce Sargassum natans. Selon un autre mode de réalisation particulier, la pâte à papier selon l'invention est obtenue à partir d'un mélange d'algues brunes de l'espèce Sargassum fluitans et de l'espèce Sargassum natans. In one embodiment of the invention, the paper pulp according to the invention is obtained from brown algae, advantageously brown algae of the genus Sargassum. According to a particular embodiment of the invention, the brown algae of the genus Sargassum is chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species. According to a particular embodiment, the paper pulp according to the invention is obtained from only brown algae of the species Sargassum fluitans. According to another particular embodiment, the paper pulp according to the invention is obtained from only brown algae of the species Sargassum natans. According to another particular embodiment, the paper pulp according to the invention is obtained from a mixture of brown algae of the species Sargassum fluitans and of the species Sargassum natans.
Selon un autre mode de réalisation particulier, lorsque la pâte à papier selon l'invention est obtenue à partir d'un mélange d'algues brunes de l'espèce Sargassum fluitans et de l'espèce Sargassum natans, le ratio entre les espèces Sargassum natans et Sargassum fluitans dans le mélange est de 1 :99, avantageusement 2 :98, avantageusement 3 :97, avantageusement 4 :96, avantageusement 5 :95, avantageusement 6 :94, avantageusement 7 :93, avantageusement 8 :92, avantageusement 9 :91, avantageusement 10 :90, avantageusement 11 :89, avantageusement 12 :88, avantageusement 13 :87, avantageusement 14 :86, avantageusement 15 :85, avantageusement 16 :84, avantageusement 17 :83, avantageusement 18 :82, avantageusement 19 :81, avantageusement 20:80, avantageusement 21 :79, avantageusement 22 :78, avantageusement 23 :77, avantageusement 24 :76, avantageusement 25 :75, avantageusement 26 :74, avantageusement 27 :73, avantageusement 28 :72, avantageusement 29 :71, avantageusement 30 :70, avantageusement 31 :69, avantageusement 32 :68, avantageusement 33 :67, avantageusement 34 :66, avantageusement 35 :65, avantageusement 36 :64, avantageusement 37 :63, avantageusement 38 :62, avantageusement 39 :61, avantageusement 40:60, avantageusement 41 :59, avantageusement 42 :58, avantageusement 43 :57, avantageusement 44 :56, avantageusement 45 :55, avantageusement 46 :54, avantageusement 47 :53, avantageusement 48 :52, avantageusement 49 :51, avantageusement 50 :50, avantageusement 51 :49, avantageusement 52 :48, avantageusement 53 :47, avantageusement 54 :46, avantageusement 55 :45, avantageusement 56 :44, avantageusement 57 :43, avantageusement 58 :42, avantageusement 59 :41, avantageusement 60:40, avantageusement 61 :39, avantageusement 62 :38, avantageusement 63 :37, avantageusement 44 :36, avantageusement 65 :35, avantageusement 66 :34, avantageusement 67 :33, avantageusement 68 :32, avantageusement 69 :31, avantageusement 70:30, avantageusement 71 :29, avantageusement 72 :28, avantageusement 73 :27, avantageusement 74 :26, avantageusement 75 :25, avantageusement 76 :24,
avantageusement 77 :23, avantageusement 78 :22, avantageusement 79 :21, avantageusement 80:20, avantageusement 81 : 19, avantageusement 82 : 18, avantageusement 83 : 17, avantageusement 84 : 16, avantageusement 85 : 15, avantageusement 86 : 14, avantageusement 87 : 13, avantageusement 88 : 12, avantageusement 89 : 11, avantageusement 90: 10, avantageusement 91 :9, avantageusement 92 :8, avantageusement 93 :7, avantageusement 94 :6, avantageusement 95 :5, avantageusement 96 :4, avantageusement 97 :3, avantageusement 98 :2, avantageusement 99 : 1. Avantageusement, le ratio Sargassum natans : Sargassum fluitans dans le mélange est choisi parmi : 1 :99, 2 :98, 3 :97, 4 :96, 5 :95, 6 :94, 7 :93, 8 :92, 9 :91, 10 :90, 11 :89, 12 :88, 13 :87, 14 :86, 15 :85, 16 :84, 17 :83, 18 :82, 19 :81, 20:80, 21 :79, 22 :78, 23 :77, 24 :76, 25 :75, 26 :74, 27 :73, 28 :72, 29 :71, 30 :70, 31 :69, 32 :68, 33 :67, 34 :66, 35 :65, 36 :64, 37 :63, 38 :62, 39 :61, 40:60, 41 :59, 42 :58,According to another particular embodiment, when the paper pulp according to the invention is obtained from a mixture of brown algae of the Sargassum fluitans species and of the Sargassum natans species, the ratio between the Sargassum natans species and Sargassum fluitans in the mixture is 1:99, advantageously 2:98, advantageously 3:97, advantageously 4:96, advantageously 5:95, advantageously 6:94, advantageously 7:93, advantageously 8:92, advantageously 9: 91, advantageously 10:90, advantageously 11:89, advantageously 12:88, advantageously 13:87, advantageously 14:86, advantageously 15:85, advantageously 16:84, advantageously 17:83, advantageously 18:82, advantageously 19: 81, advantageously 20:80, advantageously 21:79, advantageously 22:78, advantageously 23:77, advantageously 24:76, advantageously 25:75, advantageously 26:74, advantageously 27:73, advantageously 28:72, advantageously 29: 71, advantageously 30:70, advantageously ent 31:69, advantageously 32:68, advantageously 33:67, advantageously 34:66, advantageously 35:65, advantageously 36:64, advantageously 37:63, advantageously 38:62, advantageously 39:61, advantageously 40:60, advantageously 41:59, advantageously 42:58, advantageously 43:57, advantageously 44:56, advantageously 45:55, advantageously 46:54, advantageously 47:53, advantageously 48:52, advantageously 49:51, advantageously 50:50, advantageously 51:49, advantageously 52:48, advantageously 53:47, advantageously 54:46, advantageously 55:45, advantageously 56:44, advantageously 57:43, advantageously 58:42, advantageously 59:41, advantageously 60:40, advantageously 61:39, advantageously 62:38, advantageously 63:37, advantageously 44:36, advantageously 65:35, advantageously 66:34, advantageously 67:33, advantageously 68:32, advantageously 69:31, advantageously 70:30, advantageously 71:29, advantageously 72:28, advantage preferably 73:27, preferably 74:26, preferably 75:25, preferably 76:24, advantageously 77:23, advantageously 78:22, advantageously 79:21, advantageously 80:20, advantageously 81:19, advantageously 82:18, advantageously 83:17, advantageously 84:16, advantageously 85:15, advantageously 86:14, advantageously 87:13, advantageously 88:12, advantageously 89:11, advantageously 90:10, advantageously 91:9, advantageously 92:8, advantageously 93:7, advantageously 94:6, advantageously 95:5, advantageously 96:4, advantageously 97:3, advantageously 98:2, advantageously 99:1. Advantageously, the ratio Sargassum natans: Sargassum fluitans in the mixture is chosen from: 1:99, 2:98, 3:97, 4:96, 5:95 , 6:94, 7:93, 8:92, 9:91, 10:90, 11:89, 12:88, 13:87, 14:86, 15:85, 16:84, 17:83, 18 :82, 19:81, 20:80, 21:79, 22:78, 23:77, 24:76, 25:75, 26:74, 27:73, 28:72, 29:71, 30:70 , 31:69, 32:68, 33:67, 34:66, 35:65, 36:64, 37:63, 38:62, 39:61, 40:60, 41:59, 42:58,
43 :57, 44 :56, 45 :55, 46 :54, 47 :53, 48 :52, 49 :51, 50 :50, 51 :49, 52 :48,43:57, 44:56, 45:55, 46:54, 47:53, 48:52, 49:51, 50:50, 51:49, 52:48,
53 :47, 54 :46, 55 :45, 56 :44, 57 :43, 58 :42, 59 :41, 60:40, 61 :39, 62 :38,53:47, 54:46, 55:45, 56:44, 57:43, 58:42, 59:41, 60:40, 61:39, 62:38,
63 :37, 44 :36, 65 :35, 66 :34, 67 :33, 68 :32, 69 :31, 70:30, 71 :29, 72 :28,63:37, 44:36, 65:35, 66:34, 67:33, 68:32, 69:31, 70:30, 71:29, 72:28,
73 :27, 74 :26, 75 :25, 76 :24, 77 :23, 78 :22, 79 :21, 80:20, 81 : 19, 82 : 18,73:27, 74:26, 75:25, 76:24, 77:23, 78:22, 79:21, 80:20, 81:19, 82:18,
83 : 17, 84 : 16, 85 : 15, 86 : 14, 87 : 13, 88 : 12, 89 : 11, 90: 10, 91 :9, 92 :8, 93 :7, 94 :6, 95 :5, 96 :4, 97 :3, 98 :2, et 99 : 1. 83:17, 84:16, 85:15, 86:14, 87:13, 88:12, 89:11, 90:10, 91:9, 92:8, 93:7, 94:6, 95: 5, 96:4, 97:3, 98:2, and 99:1.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier comprend : According to a particularly advantageous embodiment of the invention, the paper pulp comprises:
- une teneur en matière minérale comprise entre 30% et 60% en poids, - a mineral content of between 30% and 60% by weight,
- une teneur en polysaccharides non cellulosiques comprise entre 10% et 20% en poids, et - a content of non-cellulosic polysaccharides of between 10% and 20% by weight, and
- une teneur en polysaccharides cellulosiques comprise entre 8% et 15% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of between 8% and 15% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la pâte à papier comprend en outre une teneur en monosaccharides est comprise entre 7,0% et 14,0% en poids, avantageusement comprise entre 7,0% et 13,5% en poids, avantageusement comprise entre 7,0% et 13,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier comprend : Advantageously, the paper pulp further comprises a monosaccharide content is between 7.0% and 14.0% by weight, advantageously between 7.0% and 13.5% by weight, advantageously between 7.0% and 13.0% by weight relative to the total weight of the dry matter contained in the paper pulp. According to a particularly advantageous embodiment of the invention, the paper pulp comprises:
- une teneur en matière minérale comprise entre 30% et 40% en poids, - a mineral content of between 30% and 40% by weight,
- une teneur en polysaccharides non cellulosiques comprise entre 15% et 20% en poids, - a content of non-cellulosic polysaccharides of between 15% and 20% by weight,
- une teneur en polysaccharides cellulosiques comprise entre 8% et 12% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of between 8% and 12% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier comprend : According to a particularly advantageous embodiment of the invention, the paper pulp comprises:
- une teneur en matière minérale de 55% en poids, - a mineral content of 55% by weight,
- une teneur en polysaccharides non cellulosiques de 16% en poids, - a content of non-cellulosic polysaccharides of 16% by weight,
- une teneur en polysaccharides cellulosiques de 10% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of 10% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier comprend : According to a particularly advantageous embodiment of the invention, the paper pulp comprises:
- une teneur en matière minérale de 55% en poids, - a mineral content of 55% by weight,
- une teneur en polysaccharides non cellulosiques de 18,9% en poids, et - a content of non-cellulosic polysaccharides of 18.9% by weight, and
- une teneur en polysaccharides cellulosiques de 10% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of 10% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier contient : According to a particularly advantageous embodiment of the invention, the paper pulp contains:
- une teneur en matière minérale d'au moins 30% en poids, - a mineral content of at least 30% by weight,
- une teneur en polysaccharides non cellulosiques d'au moins 10% en poids, et- a content of non-cellulosic polysaccharides of at least 10% by weight, and
- une teneur en polysaccharide cellulosique d'au moins 8% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of at least 8% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier contient : According to a particularly advantageous embodiment of the invention, the paper pulp contains:
- une teneur en matière minérale comprise entre 30% et 40% en poids,
- une teneur en polysaccharides non cellulosiques comprise entre 10% et 20% en poids, et - a mineral content of between 30% and 40% by weight, - a content of non-cellulosic polysaccharides of between 10% and 20% by weight, and
- une teneur en polysaccharides cellulosiques comprise entre 8% et 15% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of between 8% and 15% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Avantageusement, la pâte à papier contient en outre une teneur en monosaccharides est comprise entre 7,0% et 14,0% en poids, avantageusement comprise entre 7,0% et 13,5% en poids, avantageusement comprise entre 7,0% et 13,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Advantageously, the paper pulp also contains a monosaccharide content is between 7.0% and 14.0% by weight, advantageously between 7.0% and 13.5% by weight, advantageously between 7.0% and 13.0% by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier contient : According to a particularly advantageous embodiment of the invention, the paper pulp contains:
- une teneur en matière minérale comprise entre 30% et 40% en poids, - a mineral content of between 30% and 40% by weight,
- une teneur en polysaccharides non cellulosiques comprise entre 15% et 20% en poids, - a content of non-cellulosic polysaccharides of between 15% and 20% by weight,
- une teneur en polysaccharides cellulosiques comprise entre 8% et 12% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of between 8% and 12% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier contient : According to a particularly advantageous embodiment of the invention, the paper pulp contains:
- une teneur en matière minérale de 55% en poids, - a mineral content of 55% by weight,
- une teneur en polysaccharides non cellulosiques de 16% en poids, - a content of non-cellulosic polysaccharides of 16% by weight,
- une teneur en polysaccharides cellulosiques de 10% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. - a cellulosic polysaccharide content of 10% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier contient une teneur en matière minérale de 55% en poids, According to a particularly advantageous embodiment of the invention, the paper pulp contains a mineral matter content of 55% by weight,
- une teneur en polysaccharides non cellulosiques de 18,9% en poids, - a content of non-cellulosic polysaccharides of 18.9% by weight,
- une teneur en polysaccharides cellulosiques de 10% en poids.
Selon un mode de réalisation particulièrement avantageux de l'invention, la pâte à papier selon l'invention peut en outre comprendre des fibres de cellulose issues de bois et/ou de plantes. - a cellulosic polysaccharide content of 10% by weight. According to a particularly advantageous embodiment of the invention, the paper pulp according to the invention may also comprise cellulose fibers derived from wood and/or plants.
A titre d'exemples de plantes pouvant être utilisée, on peut notamment citer : le chanvre, le chanvre indien, le jute, le kénaf, la liane à barriques, le lin, les orties, le papyrus, la ramie, la sparte, le tilleul, l'abaca, l'ananas, l'henequen, la langue de belle-mère, le phormium, le sisal, la yucca, les asclépiades, le coir, le coton, le kapok, le luffa, la bambou, la paille de blé, la paille de riz, le roseau, la bagasse, la zostère, la liste n'étant pas limitative. Examples of plants that can be used include: hemp, Indian hemp, jute, kenaf, barrel creeper, flax, nettles, papyrus, ramie, esparto, linden, abaca, pineapple, henequen, mother-in-law's tongue, phormium, sisal, yucca, milkweed, coir, cotton, kapok, loofah, bamboo, straw wheat, rice straw, reed, bagasse, eelgrass, the list not being exhaustive.
A titre d'exemples de bois pouvant être utilisée, on peut notamment citer le bois tendre obtenu à partir de n'importe quel bois issu d'arbres gymnospermes ou le bois dur obtenu à partir de n'importe quel bois issu d'arbres angiospermes. As examples of wood that can be used, mention may in particular be made of soft wood obtained from any wood obtained from gymnosperm trees or hard wood obtained from any wood obtained from angiosperm trees. .
Avantageusement, l'ajout de fibres de cellulose à la pâte à papier selon l'invention permet de renforcer le réseau de fibres de la pâte à papier et ainsi ces propriétés mécaniques. Advantageously, the addition of cellulose fibers to the paper pulp according to the invention makes it possible to reinforce the network of fibers of the paper pulp and thus these mechanical properties.
Selon un mode de réalisation particulier de l'invention, la teneur en fibres de cellulose issues de bois et/ou de plantes est inférieure ou égale à 15% poids par rapport au poids total de la pâte à papier. Avantageusement, la teneur en fibres de cellulose issues de bois et/ou de plantes est inférieure ou égale à 14% poids, avantageusement inférieure ou égale à 13% poids, avantageusement inférieure ou égale à 12% poids, avantageusement inférieure ou égale à 11% poids, avantageusement inférieure ou égale à 10% poids, avantageusement inférieure ou égale à 9% poids, avantageusement inférieure ou égale à 8% poids, avantageusement inférieure ou égale à 7% poids, avantageusement inférieure ou égale à 6% poids, avantageusement inférieure ou égale à 5% poids, avantageusement inférieure ou égale à 4% poids, avantageusement inférieure ou égale à 3% poids, avantageusement inférieure ou égale à 2% poids, avantageusement inférieure ou égale à 1% poids par rapport au poids total de la pâte à papier. According to a particular embodiment of the invention, the content of cellulose fibers derived from wood and/or plants is less than or equal to 15% by weight relative to the total weight of the paper pulp. Advantageously, the content of cellulose fibers from wood and/or plants is less than or equal to 14% by weight, advantageously less than or equal to 13% by weight, advantageously less than or equal to 12% by weight, advantageously less than or equal to 11% weight, advantageously less than or equal to 10% weight, advantageously less than or equal to 9% weight, advantageously less than or equal to 8% weight, advantageously less than or equal to 7% weight, advantageously less than or equal to 6% weight, advantageously less than or equal to 5% by weight, advantageously less than or equal to 4% by weight, advantageously less than or equal to 3% by weight, advantageously less than or equal to 2% by weight, advantageously less than or equal to 1% by weight relative to the total weight of the dough paper.
Un autre aspect de l'invention concerne un procédé de fabrication d'une pâte à papier à partir d'algues brunes.
Avantageusement, le procédé de fabrication d'une pâte à papier à partir d'algues brunes selon l'invention comprend les étapes suivantes : a) récolter les algues brunes, b) traiter les algues brunes avec un agent alcalin, c) chauffer le mélange de l'étape b) à une température et pendant une durée prédéfinie, d) mixer le mélange issu de l'étape c), afin d'obtenir une pâte d'algues, e) filtrer et récupérer la pâte d'algues. Another aspect of the invention relates to a process for producing a paper pulp from brown algae. Advantageously, the process for manufacturing a paper pulp from brown algae according to the invention comprises the following steps: a) harvesting the brown algae, b) treating the brown algae with an alkaline agent, c) heating the mixture from step b) at a temperature and for a predefined time, d) mixing the mixture resulting from step c), in order to obtain an algae paste, e) filtering and recovering the algae paste.
Avantageusement, les algues brunes sont d'algues brunes du genre Sargassum. Selon un mode de réalisation particulier de l'invention, les algues brunes du genre Sargassum est choisi parmi les espèces Sargassum fluitans, Sargassum natans ou un mélange de ces deux espèces. Advantageously, the brown algae are brown algae of the Sargassum genus. According to a particular embodiment of the invention, the brown algae of the genus Sargassum is chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species.
Avantageusement, les algues brunes de l'étape a) sont récoltées sur la plage, en bord de mer ou directement dans la mer. Selon un mode de réalisation particulièrement avantageux, les algues brunes sont directement récoltées dans la mer, ce qui évite de les rincer afin d'éliminer le sable qu'elles peuvent contenir. Advantageously, the brown algae from step a) are harvested on the beach, by the sea or directly from the sea. According to a particularly advantageous embodiment, the brown algae are harvested directly from the sea, which avoids rinse to remove any sand they may contain.
Avantageusement, l'étape b) concerne le traitement des algues brunes préalablement récoltées avec un agent alcalin. Selon un mode de réalisation particulier, l'agent alcalin est choisi parmi la soude, la lessive de soude, la potasse, le carbonate de sodium, le carbonate de potassium, la liste n'étant pas limitative. Avantageusement, l'agent alcalin peut être dissout dans de l'eau douce ou dans de l'eau de mer, préalablement à son utilisation. Selon un mode de réalisation particulier, le traitement des algues brunes est réalisé en utilisant une concentration prédéfinie en agent alcalin et pendant une durée prédéfinie. Avantageusement, la concentration en agent alcalin est d'au moins 15,00 grammes par litre d'eau, avantageusement au moins 15,25 grammes par litre d'eau, avantageusement au moins 15,50 grammes par litre d'eau, avantageusement au moins 15,75 grammes par litre d'eau, avantageusement au moins 16,00 grammes par litre d'eau, avantageusement au moins 16,25 grammes par litre d'eau, avantageusement au moins 16,50 grammes par litre d'eau, avantageusement au moins 16,75 grammes par litre d'eau, avantageusement au moins 17,00 grammes par litre d'eau, avantageusement au
moins 17,25 grammes par litre d'eau, avantageusement au moins 17,50 grammes par litre d'eau, avantageusement au moins 17,75 grammes par litre d'eau, avantageusement au moins 18,00 grammes par litre d'eau, avantageusement au moins 18,25 grammes par litre d'eau, avantageusement au moins 18,50 grammes par litre d'eau, avantageusement au moins 18,75 grammes par litre d'eau, avantageusement au moins 19,00 grammes par litre d'eau, avantageusement au moins 19,25 grammes par litre d'eau, avantageusement au moins 19,50 grammes par litre d'eau, avantageusement au moins 19,75 grammes par litre d'eau, avantageusement au moins 20,00 grammes par litre d'eau. Avantageusement, l'eau peut être de l'eau de mer ou de l'eau douce. Avantageusement, la quantité d'agent alcalin dissout dans de l'eau douce ou dans de l'eau de mer est de 150g pour 8 kg d'eau douce ou d'eau de mer, Advantageously, step b) relates to the treatment of the brown algae harvested beforehand with an alkaline agent. According to a particular embodiment, the alkaline agent is chosen from sodium hydroxide, sodium hydroxide solution, potassium hydroxide, sodium carbonate, potassium carbonate, the list not being exhaustive. Advantageously, the alkaline agent can be dissolved in fresh water or in sea water, prior to its use. According to a particular embodiment, the treatment of the brown algae is carried out using a predefined concentration of alkaline agent and for a predefined duration. Advantageously, the concentration of alkaline agent is at least 15.00 grams per liter of water, advantageously at least 15.25 grams per liter of water, advantageously at least 15.50 grams per liter of water, advantageously at least least 15.75 grams per liter of water, advantageously at least 16.00 grams per liter of water, advantageously at least 16.25 grams per liter of water, advantageously at least 16.50 grams per liter of water, advantageously at least 16.75 grams per liter of water, advantageously at least 17.00 grams per liter of water, advantageously at least 17.25 grams per liter of water, advantageously at least 17.50 grams per liter of water, advantageously at least 17.75 grams per liter of water, advantageously at least 18.00 grams per liter of water, advantageously at least 18.25 grams per liter of water, advantageously at least 18.50 grams per liter of water, advantageously at least 18.75 grams per liter of water, advantageously at least 19.00 grams per liter of water, preferably at least 19.25 grams per liter of water, preferably at least 19.50 grams per liter of water, preferably at least 19.75 grams per liter of water, preferably at least 20.00 grams per liter of water. Advantageously, the water can be sea water or fresh water. Advantageously, the quantity of alkaline agent dissolved in fresh water or in sea water is 150 g per 8 kg of fresh water or sea water,
Avantageusement, la durée du traitement avec l'agent alcalin est d'au moins 30 minutes, avantageusement au moins 45 minutes, avantageusement au moins 60 minutes, avantageusement au moins 75 minutes, avantageusement au moins 90 minutes, avantageusement au moins 105 minutes, avantageusement au moins 120 minutes, avantageusement au moins 135 minutes, avantageusement au moins 150 minutes, avantageusement au moins 165 minutes, avantageusement au moins 180 minutes, avantageusement au moins 195 minutes, avantageusement au moins 210 minutes, avantageusement au moins 225 minutes, avantageusement au moins 240 minutes. De manière particulièrement avantageuse, la durée du traitement avec l'agent alcalin est de 120 minutes.Advantageously, the duration of the treatment with the alkaline agent is at least 30 minutes, advantageously at least 45 minutes, advantageously at least 60 minutes, advantageously at least 75 minutes, advantageously at least 90 minutes, advantageously at least 105 minutes, advantageously at least 120 minutes, advantageously at least 135 minutes, advantageously at least 150 minutes, advantageously at least 165 minutes, advantageously at least 180 minutes, advantageously at least 195 minutes, advantageously at least 210 minutes, advantageously at least 225 minutes, advantageously at least 240 minutes. In a particularly advantageous manner, the duration of the treatment with the alkaline agent is 120 minutes.
Avantageusement, l'étape c) concerne le chauffage du mélange de l'étape b) à une température et pendant une durée prédéfinie. Selon un mode de réalisation particulier, le mélange de l'étape b) est chauffé à une température d'au moinsAdvantageously, step c) relates to the heating of the mixture from step b) to a temperature and for a predefined duration. According to a particular embodiment, the mixture of step b) is heated to a temperature of at least
30°C, avantageusement d'au moins 35°C, avantageusement d'au moins 40°C, avantageusement d'au moins 45°C, avantageusement d'au moins 50°C, avantageusement d'au moins 55°C, avantageusement d'au moins 60°C, avantageusement d'au moins 65°C, avantageusement d'au moins 70°C, avantageusement d'au moins 75°C, avantageusement d'au moins 80°C, avantageusement d'au moins 85°C, avantageusement d'au moins 90°C, avantageusement d'au moins 95°C. Dans un mode de réalisation particulier de l'invention, la température de chauffage est inférieure à 100°C.
Avantageusement, le mélange obtenu à l'étape b) est placé à une température comprise entre 40°C et 80°C, avantageusement à une température comprise entre 40°C et 60°C, avantageusement à une température de 40°C. Avantageusement, mélange obtenu à l'étape b) est placé à une température comprise entre 40°C et 80°C pendant 10 minutes à 3 heures, avantageusement pendant 15 minutes à 2 heures, avantageusement pendant 30 minutes à 2 heures, avantageusement pendant 1 à 2 heures. Avantageusement, l'homme du métier saura adapter la température et la durée du chauffage afin de ne pas dégrader les propriétés physicochimiques du papier. Avantageusement, l'étape de chauffage du mélange (étape b)) est réalisée à une température de 40°C pendant 2 heures. 30°C, advantageously at least 35°C, advantageously at least 40°C, advantageously at least 45°C, advantageously at least 50°C, advantageously at least 55°C, advantageously of at least 60°C, advantageously of at least 65°C, advantageously of at least 70°C, advantageously of at least 75°C, advantageously of at least 80°C, advantageously of at least 85 °C, advantageously at least 90°C, advantageously at least 95°C. In a particular embodiment of the invention, the heating temperature is less than 100°C. Advantageously, the mixture obtained in step b) is placed at a temperature of between 40°C and 80°C, advantageously at a temperature of between 40°C and 60°C, advantageously at a temperature of 40°C. Advantageously, the mixture obtained in step b) is placed at a temperature of between 40° C. and 80° C. for 10 minutes to 3 hours, advantageously for 15 minutes to 2 hours, advantageously for 30 minutes to 2 hours, advantageously for 1 at 2 o'clock. Advantageously, those skilled in the art will know how to adapt the temperature and the duration of the heating so as not to degrade the physicochemical properties of the paper. Advantageously, the step of heating the mixture (step b)) is carried out at a temperature of 40° C. for 2 hours.
Avantageusement, à l'issue de l'étape c), le mélange est mixé, afin d'obtenir une pâte d'algues. Cette étape permet d'obtenir un mélange homogène. Avantageusement, l'étape d) est réalisée à l'aide d'un broyeur. Dans un mode de réalisation particulier de l'invention, le broyeur peut être choisi parmi un broyeur à couteaux, un broyeur à broches, un broyeur à marteaux, un broyeur à disques, un broyeur à meules, la liste n'étant pas limitative. Avantageusement, l'étape d) est réalisée à l'aide d'un défibreur ou encore à l'aide d'un raffineur. Advantageously, at the end of step c), the mixture is mixed, in order to obtain an algae paste. This step makes it possible to obtain a homogeneous mixture. Advantageously, step d) is carried out using a grinder. In a particular embodiment of the invention, the crusher can be chosen from a knife crusher, a pin crusher, a hammer crusher, a disc crusher, a grinding wheel crusher, the list not being exhaustive. Advantageously, step d) is carried out using a shredder or even using a refiner.
Avantageusement, la pâte d'algues issue de l'étape d) est ensuite filtrée (étape e), afin d'éliminer l'eau contenue dans ladite pâte d'algue, puis la pâte d'algues est récupérée. Selon un mode de réalisation particulier de l'invention, l'étape de filtration (étape e)) est réalisée par pressage manuel en utilisant un tissus sec. Cette étape permet d'éliminer l'eau contenue dans les algues et de concentrer les fibres de cellulose dans la pâte d'algue. Selon un autre mode de réalisation, l'étape de filtration peut être réalisée en utilisant un tamis ou une toile filtrante. Selon un autre mode de réalisation, l'étape de filtration peut être réalisée par pressage au moyen d'une presse à vis (de type bi-vis par exemple) ou un filtre presse. Le pressage peut être réalisé à température ambiante ou à plus haute température. Un traitement chimique est possible pendant ou avant le pressage.Advantageously, the seaweed paste from step d) is then filtered (step e), in order to remove the water contained in said seaweed paste, then the seaweed paste is recovered. According to a particular embodiment of the invention, the filtration step (step e)) is carried out by manual pressing using a dry cloth. This step eliminates the water contained in the seaweed and concentrates the cellulose fibers in the seaweed paste. According to another embodiment, the filtration step can be carried out using a sieve or a filter cloth. According to another embodiment, the filtration step can be carried out by pressing using a screw press (of the twin-screw type for example) or a filter press. The pressing can be carried out at room temperature or at higher temperature. Chemical treatment is possible during or before pressing.
Selon un mode de réalisation particulier de l'invention, la pâte d'algue obtenue à l'étape e) est ensuite rincer avec de l'eau douce ou de l'eau de mer, avantageusement avec de l'eau de mer, puis mise au repos pendant au moins 15 minutes, avantageusement au moins 30 minutes, avantageusement au moins 45 According to a particular embodiment of the invention, the seaweed paste obtained in step e) is then rinsed with fresh water or sea water, advantageously with sea water, then resting for at least 15 minutes, advantageously at least 30 minutes, advantageously at least 45
Tl
minutes, avantageusement au moins 1 heure, avantageusement au moins 2 heures, afin de permettre l'obtention de la pâte à papier selon l'invention. Cette étape permet d'éliminer l'excès de composé alcalin issu de l'étape de cuisson et de rincer une partie des minéraux et métabolites solubles restés piégés dans la pâte. Elle contribue aussi à réduire la coloration de la pâte. Enfin, elle permet de réduire l'alcalinité de la pâte et d'améliorer sa conservation et celle des propriétés mécaniques du papier. tl minutes, advantageously at least 1 hour, advantageously at least 2 hours, in order to allow the paper pulp according to the invention to be obtained. This step eliminates the excess alkaline compound from the cooking step and rinses some of the soluble minerals and metabolites that have remained trapped in the dough. It also helps to reduce the coloring of the dough. Finally, it reduces the alkalinity of the pulp and improves its conservation and that of the mechanical properties of the paper.
Selon un mode de réalisation particulier de l'invention, le procédé de fabrication de la pâte à papier peut comprendre en outre une étape de blanchissement ou de décoloration totale de la pâte à papier, avantageusement à l'issue de l'étape e). Avantageusement, l'étape de blanchissement ou de décoloration totale de la pâte à papier obtenue selon le procédé de l'invention, est réalisée en ajoutant à la pâte d'algues un produit blanchissant, ledit produit blanchissant étant choisi parmi l'hypochlorite de sodium, du peroxyde d'hydrogène, de l'hydroxyde de sodium, des agents chélatants, de l'acide citrique ou de l'ozone, ou en la traitant par voie enzymatique avec des chlorophyllases ou des caroténases, la liste n'étant pas limitative, ou par cuisson en milieu basique. Une solution d'hypochlorite de sodium peut être ajoutée à la pâte à papier à raison de 1% de chlore actif par rapport au poids sec de la pâte à papier. Le blanchiment de la pâte à papier peut être obtenu en la chauffant (cuisson) en présence d'hydroxyde de sodium, à une température comprise entre 60 et 90°C, avantageusement entre 70 et 80°C. La pâte à papier peut être également mise en présence d'hydroxyde de sodium, d'agents chélatants (par exemple l'EDTA) et d'acide citrique dans des conditions normales de température. Le blanchiment de la pâte à papier peut être obtenu par l'addition de trois composants dans la pâte : un acide, une enzyme et un agent dispersant tel qu'un tensioactif. L'acide et l'enzyme servent à détruire les colorants naturels des algues et l'agent dispersant évite la sédimentation de ces colorants. According to a particular embodiment of the invention, the process for manufacturing the paper pulp may also comprise a step of bleaching or total discoloration of the paper pulp, advantageously at the end of step e). Advantageously, the stage of bleaching or total discoloration of the paper pulp obtained according to the method of the invention is carried out by adding to the seaweed pulp a bleaching product, said bleaching product being chosen from sodium hypochlorite , hydrogen peroxide, sodium hydroxide, chelating agents, citric acid or ozone, or by treating it enzymatically with chlorophyllases or carotenases, the list not being exhaustive , or by cooking in a basic medium. A solution of sodium hypochlorite can be added to the pulp at the rate of 1% active chlorine based on the dry weight of the pulp. The whitening of the paper pulp can be obtained by heating it (cooking) in the presence of sodium hydroxide, at a temperature of between 60 and 90°C, advantageously between 70 and 80°C. The paper pulp can also be placed in the presence of sodium hydroxide, chelating agents (for example EDTA) and citric acid under normal temperature conditions. The bleaching of paper pulp can be obtained by adding three components to the pulp: an acid, an enzyme and a dispersing agent such as a surfactant. The acid and the enzyme serve to destroy the natural dyes of the algae and the dispersing agent prevents the sedimentation of these dyes.
Selon un mode de réalisation particulier de l'invention, le procédé de fabrication de la pâte à papier peut comprendre en outre une étape de traitement de la pâte à papier en vue de supprimer ou de masquer son odeur, par exemple en y ajoutant des particules poreuses absorbant cette odeur ou des molécules odorantes, telles que de la vanille synthétique (par exemple de la vanilline). I I est en effet préférable de supprimer ou masquer l'odeur naturelle iodée des
algues qui pourrait persister dans le papier, car cette odeur peut être particulièrement désagréable en particulier lorsqu'une grande quantité de papiers libèrent simultanément des effluves, par exemple lors de leur désemballage par un imprimeur, ou lors de l'impression du papier. Les particules poreuses peuvent être des particules de charbon actif, de silice poreuse, de diatomée, d'allophane, de zéolithe ou toutes autres particules à fortes surfaces spécifiques, qui sont mélangées à la pâte à papier, par exemple à raison de 0,01 à 5% en poids par rapport au poids sec de la pâte d'algues. Ces particules poreuses ont de préférence une surface spécifique relativement importante. Les particules de charbon actif, de silice poreuse, de diatomée, d'allophane ou de zéolithe peuvent être également ajoutées à la pâte d'algues lors d'une étape préalable, puis enlevées par tamisage. Ceci permet de ne pas retrouver ces particules dans le papier final. According to a particular embodiment of the invention, the process for manufacturing the paper pulp may further comprise a step of treating the paper pulp with a view to removing or masking its odor, for example by adding particles porous absorbing this odor or odorous molecules, such as synthetic vanilla (eg vanillin). It is in fact preferable to remove or mask the natural iodized odor of the algae which could persist in the paper, because this odor can be particularly unpleasant, in particular when a large quantity of paper simultaneously releases effluvia, for example during its unpacking by a printer, or during the printing of the paper. The porous particles can be particles of activated carbon, porous silica, diatomaceous earth, allophane, zeolite or any other particles with high specific surface areas, which are mixed with the paper pulp, for example at a rate of 0.01 at 5% by weight relative to the dry weight of the seaweed paste. These porous particles preferably have a relatively large specific surface. The particles of activated carbon, porous silica, diatomaceous earth, allophane or zeolite can also be added to the seaweed paste during a preliminary stage, then removed by sieving. This makes it possible not to find these particles in the final paper.
Selon un mode de réalisation particulier de l'invention, le procédé de fabrication de la pâte à papier peut comprendre en outre après l'étape e) une étape consistant à ajouter des fibres de cellulose issues de bois et/ou de plantes à la pâte à papier selon l'invention. According to a particular embodiment of the invention, the process for manufacturing the paper pulp may further comprise, after step e), a step consisting in adding cellulose fibers from wood and/or plants to the pulp to paper according to the invention.
Un autre aspect de l'invention concerne un procédé de fabrication de papier à partir d'une pâte d'algues préparée selon le procédé décrit ci-dessus, caractérisé en ce qu'il comprend les étapes consistant à : a) mélanger la pâte à papier à de l'eau, afin d'obtenir une pâte à papier diluée, b) répartir la pâte à papier diluée sur un tamis, c) égoutter la pâte à papier diluée, et d) laisser sécher la pâte à papier diluée, et récupérer la feuille de papier ainsi formée. Another aspect of the invention relates to a process for the manufacture of paper from a paste of seaweed prepared according to the process described above, characterized in that it comprises the steps consisting in: a) mixing the paste with paper to water, in order to obtain a diluted paper pulp, b) spread the diluted paper pulp on a sieve, c) drain the diluted paper pulp, and d) allow the diluted paper pulp to dry, and recover the sheet of paper thus formed.
Avantageusement, l'étape a) du procédé de fabrication de papier à partir d'une pâte d'algues consiste à mélanger la pâte à papier à de l'eau, afin d'obtenir une pâte à papier diluée. Avantageusement, l'eau utilisée est de l'eau douce ou de l'eau de mer ou un mélange des deux. Selon un mode de réalisation particulier l'eau utilisée est de l'eau de mer. Selon un autre mode de réalisation particulier l'eau utilisée est de l'eau douce. Selon un mode de réalisation particulier l'eau utilisée est un mélange d'eau de mer et d'eau douce. Lorsque l'étape a) du procédé utilise un mélange d'eau de mer et d'eau douce, le ratio entre d'eau de
mer et d'eau douce dans le mélange est de 1 :99, avantageusement 2 :98, avantageusement 3 :97, avantageusement 4 :96, avantageusement 5 :95, avantageusement 6 :94, avantageusement 7 :93, avantageusement 8 :92, avantageusement 9 :91, avantageusement 10 :90, avantageusement 11 :89, avantageusement 12 :88, avantageusement 13 :87, avantageusement 14 :86, avantageusement 15 :85, avantageusement 16 :84, avantageusement 17 :83, avantageusement 18 :82, avantageusement 19 :81, avantageusement 20:80, avantageusement 21 :79, avantageusement 22 :78, avantageusement 23 :77, avantageusement 24 :76, avantageusement 25 :75, avantageusement 26 :74, avantageusement 27 :73, avantageusement 28 :72, avantageusement 29 :71, avantageusement 30 :70, avantageusement 31 :69, avantageusement 32 :68, avantageusement 33 :67, avantageusement 34 :66, avantageusement 35 :65, avantageusement 36 :64, avantageusement 37 :63, avantageusement 38 :62, avantageusement 39 :61, avantageusement 40:60, avantageusement 41 :59, avantageusement 42 :58, avantageusement 43 :57, avantageusement 44 :56, avantageusement 45 :55, avantageusement 46 :54, avantageusement 47 :53, avantageusement 48 :52, avantageusement 49 :751, avantageusement 50 :50, avantageusement 51 :49, avantageusement 52 :48, avantageusement 53 :47, avantageusement 54 :46, avantageusement 55 :45, avantageusement 56 :44, avantageusement 57 :43, avantageusement 58 :42, avantageusement 59 :41, avantageusement 60:40, avantageusement 61 :39, avantageusement 62 :38, avantageusement 63 :37, avantageusement 44 :36, avantageusement 65 :35, avantageusement 66 :34, avantageusement 67 :33, avantageusement 68 :32, avantageusement 69 :31, avantageusement 70:30, avantageusement 71 :29, avantageusement 72 :28, avantageusement 73 :27, avantageusement 74 :26, avantageusement 75 :25, avantageusement 76 :24, avantageusement 77 :23, avantageusement 78 :22, avantageusement 79 :21, avantageusement 80:20, avantageusement 81 : 19, avantageusement 82 : 18, avantageusement 83 : 17, avantageusement 84 : 16, avantageusement 85 : 15, avantageusement 86 : 14, avantageusement 87 : 13, avantageusement 88 : 12, avantageusement 89 : 11, avantageusement 90: 10, avantageusement 91 :9, avantageusement 92 :8, avantageusement 93 :7, avantageusement 94 :6, avantageusement 95 :5, avantageusement 96 :4, avantageusement 97 :3, avantageusement 98 :2, avantageusement 99 : 1. Avantageusement, le ratio eau de mer : eau douce dans le mélange est choisi parmi : 1 :99, 2 :98, 3 :97, 4 :96, 5 :95, 6 :94, 7 :93,
8 :92, 9 :91, 10 :90, 11 :89, 12 :88, 13 :87, 14 :86, 15 :85, 16 :84, 17 :83, 18 :82, 19 :81, 20:80, 21 :79, 22 :78, 23 :77, 24 :76, 25 :75, 26 :74, 27 :73, 28 :72, 29 :71, 30 :70, 31 :69, 32 :68, 33 :67, 34 :66, 35 :65, 36 :64, 37 :63, 38 :62, 39 :61, 40:60, 41 :59, 42 :58, 43 :57, 44 :56, 45 :55, 46 :54, 47 :53,Advantageously, step a) of the process for manufacturing paper from an algae pulp consists in mixing the paper pulp with water, in order to obtain a diluted paper pulp. Advantageously, the water used is fresh water or sea water or a mixture of the two. According to a particular embodiment, the water used is sea water. According to another particular embodiment, the water used is fresh water. According to a particular embodiment, the water used is a mixture of sea water and fresh water. When step a) of the process uses a mixture of seawater and freshwater, the ratio between seawater sea and fresh water in the mixture is 1:99, advantageously 2:98, advantageously 3:97, advantageously 4:96, advantageously 5:95, advantageously 6:94, advantageously 7:93, advantageously 8:92, advantageously 9:91, advantageously 10:90, advantageously 11:89, advantageously 12:88, advantageously 13:87, advantageously 14:86, advantageously 15:85, advantageously 16:84, advantageously 17:83, advantageously 18:82, advantageously 19:81, advantageously 20:80, advantageously 21:79, advantageously 22:78, advantageously 23:77, advantageously 24:76, advantageously 25:75, advantageously 26:74, advantageously 27:73, advantageously 28:72, advantageously 29:71, advantageously 30:70, advantageously 31:69, advantageously 32:68, advantageously 33:67, advantageously 34:66, advantageously 35:65, advantageously 36:64, advantageously 37:63, advantageously 38:62, advantageously 39:61, advantageously 40:60, advantageously 41:59, a advantageously 42:58, advantageously 43:57, advantageously 44:56, advantageously 45:55, advantageously 46:54, advantageously 47:53, advantageously 48:52, advantageously 49:751, advantageously 50:50, advantageously 51:49, advantageously 52:48, advantageously 53:47, advantageously 54:46, advantageously 55:45, advantageously 56:44, advantageously 57:43, advantageously 58:42, advantageously 59:41, advantageously 60:40, advantageously 61:39, advantageously 62:38, advantageously 63:37, advantageously 44:36, advantageously 65:35, advantageously 66:34, advantageously 67:33, advantageously 68:32, advantageously 69:31, advantageously 70:30, advantageously 71:29, advantageously 72:28, advantageously 73:27, advantageously 74:26, advantageously 75:25, advantageously 76:24, advantageously 77:23, advantageously 78:22, advantageously 79:21, advantageously 80:20, advantageously 81:19, preferably 82:18, preferably 8 3:17, preferably 84:16, preferably 85:15, preferably 86:14, preferably 87:13, preferably 88:12, preferably 89:11, preferably 90:10, preferably 91:9, preferably 92:8, preferably 93:7, advantageously 94:6, advantageously 95:5, advantageously 96:4, advantageously 97:3, advantageously 98:2, advantageously 99:1. Advantageously, the ratio of sea water: fresh water in the mixture is chosen from : 1:99, 2:98, 3:97, 4:96, 5:95, 6:94, 7:93, 8:92, 9:91, 10:90, 11:89, 12:88, 13:87, 14:86, 15:85, 16:84, 17:83, 18:82, 19:81, 20: 80, 21:79, 22:78, 23:77, 24:76, 25:75, 26:74, 27:73, 28:72, 29:71, 30:70, 31:69, 32:68, 33:67, 34:66, 35:65, 36:64, 37:63, 38:62, 39:61, 40:60, 41:59, 42:58, 43:57, 44:56, 45: 55, 46:54, 47:53,
48 :52, 49 :51, 50 :50, 51 :49, 52 :48, 53 :47, 54 :46, 55 :45, 56 :44, 57 :43,48:52, 49:51, 50:50, 51:49, 52:48, 53:47, 54:46, 55:45, 56:44, 57:43,
58 :42, 59 :41, 60:40, 61 :39, 62 :38, 63 :37, 44 :36, 65 :35, 66 :34, 67 :33,58:42, 59:41, 60:40, 61:39, 62:38, 63:37, 44:36, 65:35, 66:34, 67:33,
68 :32, 69 :31, 70:30, 71 :29, 72 :28, 73 :27, 74 :26, 75 :25, 76 :24, 77 :23,68:32, 69:31, 70:30, 71:29, 72:28, 73:27, 74:26, 75:25, 76:24, 77:23,
78 :22, 79 :21, 80:20, 81 : 19, 82 : 18, 83 : 17, 84 : 16, 85 : 15, 86 : 14, 87 : 13,78:22, 79:21, 80:20, 81:19, 82:18, 83:17, 84:16, 85:15, 86:14, 87:13,
88 : 12, 89 : 11, 90: 10, 91 :9, 92 :8, 93 :7, 94 :6, 95 :5, 96 :4, 97 :3, 98 :2, et 99 : 1. 88:12, 89:11, 90:10, 91:9, 92:8, 93:7, 94:6, 95:5, 96:4, 97:3, 98:2, and 99:1.
Selon un mode de réalisation particulier de l'invention, la dilution est réalisée en utilisant un ratio pâte à papier : eau est d'au moins 1 : 1 (vol/vol), avantageusement 1 :2, avantageusement 1 :3, avantageusement 1 :4, avantageusement 1 :5, avantageusement 1 :6, avantageusement 1 :7, avantageusement 1 :8, avantageusement 1 :9, avantageusement 1 : 10 (vol/vol).According to a particular embodiment of the invention, the dilution is carried out using a pulp:water ratio of at least 1:1 (vol/vol), advantageously 1:2, advantageously 1:3, advantageously 1 :4, advantageously 1:5, advantageously 1:6, advantageously 1:7, advantageously 1:8, advantageously 1:9, advantageously 1:10 (vol/vol).
Avantageusement, l'étape b) du procédé de fabrication de papier à partir d'une pâte d'algues consiste à répartir la pâte à papier diluée sur un tamis. La forme et la taille du tamis sont choisies en fonction de la forme et la dimension de la feuille de papier que l'on souhaite obtenir. Advantageously, step b) of the process for manufacturing paper from an algae pulp consists in distributing the diluted paper pulp on a sieve. The shape and the size of the sieve are chosen according to the shape and the dimension of the sheet of paper which one wishes to obtain.
Avantageusement, l'étape c) du procédé de fabrication de papier à partir d'une pâte d'algues consiste à égoutter la pâte à papier diluée. Avantageusement, l'étape c) est réalisée pendant une durée d'au moins 5 minutes, avantageusement au moins 6 minutes, avantageusement au moins 7 minutes, avantageusement au moins 8 minutes, avantageusement au moins 9 minutes, avantageusement au moins 10 minutes, afin de permettre d'éliminer l'eau contenue dans la pâte à papier diluée. Avantageusement, cette étape d'égouttage peut être réalisée par une presse, par aspiration, avantageusement en utilisation une pompe à vide, ou par gravité. L'homme du métier saura adapter la pression de presse en fonction du matériau à égoutter. L'homme du métier saura adapter le système d'aspiration, avantageusement la pompe à vide en fonction du matériau à égoutter.
Avantageusement, l'étape d) du procédé de fabrication de papier à partir d'une pâte d'algues consiste à laisser sécher la pâte à papier diluée, et récupérer la feuille de papier ainsi formée. Advantageously, step c) of the process for manufacturing paper from an algae pulp consists in draining the diluted paper pulp. Advantageously, step c) is carried out for a period of at least 5 minutes, advantageously at least 6 minutes, advantageously at least 7 minutes, advantageously at least 8 minutes, advantageously at least 9 minutes, advantageously at least 10 minutes, in order to enable the water contained in the diluted paper pulp to be eliminated. Advantageously, this draining step can be carried out by a press, by suction, advantageously using a vacuum pump, or by gravity. A person skilled in the art will know how to adapt the press pressure according to the material to be drained. A person skilled in the art will know how to adapt the suction system, advantageously the vacuum pump, according to the material to be drained. Advantageously, step d) of the process for manufacturing paper from an algae paste consists in allowing the diluted paper paste to dry, and recovering the sheet of paper thus formed.
Avantageusement, cette étape de séchage peut être réalisée par séchage à l'air libre ou dans une étuve ou en utilisant le séchage sur un ou plusieurs cylindres sécheurs ou encore en utilisant un four à basse température. L'homme du métier saura adapter la température de l'étuve ou du four ou du ou des cylindres sécheurs en fonction du matériau à sécher. Avantageusement, le séchage est réalisé par séchage à l'air libre, avantageusement entre 20°C et 30°C, pendant au moins 1 jour, avantageusement au moins 2 jours, avantageusement pendant 3 jours. Advantageously, this drying step can be carried out by drying in the open air or in an oven or by using drying on one or more drying cylinders or even by using a low-temperature oven. A person skilled in the art will know how to adapt the temperature of the oven or of the oven or of the drying cylinder(s) according to the material to be dried. Advantageously, the drying is carried out by drying in the open air, advantageously between 20° C. and 30° C., for at least 1 day, advantageously at least 2 days, advantageously for 3 days.
Un autre aspect de l'invention concerne le papier obtenu par le procédé de fabrication de papier à partir d'une pâte d'algues selon l'invention. Another aspect of the invention relates to the paper obtained by the method of manufacturing paper from a paste of seaweed according to the invention.
Avantageusement, le papier obtenu par le procédé de fabrication de papier à partir d'une pâte d'algues selon l'invention comprend une teneur en matière minérale d'au moins 20,0% en poids et une teneur en alginate est inférieure à 1,0% en poids, les pourcentages étant exprimé par rapport au poids total de la matière sèche du papier. Avantageusement, le papier est obtenu à partir d'une pâte d'algues brunes du genre Sargassum, avantageusement à partir d'algues brunes du genre Sargassum choisies parmi les espèces Sargassum fluitans, Sargassum natans ou un mélange de ces deux espèces. Advantageously, the paper obtained by the process for manufacturing paper from an algae paste according to the invention comprises a mineral content of at least 20.0% by weight and an alginate content of less than 1 0.0% by weight, the percentages being expressed relative to the total weight of the dry matter of the paper. Advantageously, the paper is obtained from a paste of brown algae of the Sargassum genus, advantageously from brown algae of the Sargassum genus chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species.
Avantageusement, le papier obtenu selon le procédé de l'invention comprend :Advantageously, the paper obtained according to the process of the invention comprises:
- une teneur en matière minérale d'au moins 20,0% en poids, - a mineral content of at least 20.0% by weight,
- une teneur en polysaccharides non cellulosiques d'au moins 15,0% en poids, et- a content of non-cellulosic polysaccharides of at least 15.0% by weight, and
- une teneur en polysaccharides cellulosiques d'au moins 20,0% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche du papier. - a cellulosic polysaccharide content of at least 20.0% by weight, each percentage being expressed by weight relative to the total weight of the dry matter of the paper.
Selon un mode de réalisation particulier, la teneur en polysaccharides non cellulosiques comprend une teneur en fucoïdane d'au moins 15,0% en poids et une teneur en alginate est inférieure à 1,0% en poids, les pourcentages étant exprimé par rapport au poids total de la matière sèche du papier.
Avantageusement, le papier obtenu selon le procédé de l'invention comprend :According to a particular embodiment, the content of non-cellulosic polysaccharides comprises a fucoidan content of at least 15.0% by weight and an alginate content is less than 1.0% by weight, the percentages being expressed relative to the total dry matter weight of the paper. Advantageously, the paper obtained according to the process of the invention comprises:
- une teneur en matière minérale d'au moins 20,0% en poids, avantageusement au moins 25,0% en poids, avantageusement au moins 29,0% en poids, - a mineral matter content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 29.0% by weight,
- une teneur en fucoïdane d'au moins 15,0% en poids, et - a fucoidan content of at least 15.0% by weight, and
- une teneur en polysaccharides cellulosiques d'au moins 20,0% en poids, avantageusement au moins 25,0% en poids, avantageusement au moins 26,0% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche du papier. - a cellulosic polysaccharide content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 26.0% by weight, each percentage being expressed by weight relative to the total weight of the paper dry matter.
Selon un mode de réalisation particulier, la teneur en fucoïdane du papier obtenu selon le procédé de l'invention est comprise entre 15,0% et 25,0% en poids, avantageusement entre 16,0% et 22,0%, avantageusement entre 16,2% et 21,7% en poids par rapport au poids total de la matière sèche du papier. According to a particular embodiment, the fucoidan content of the paper obtained according to the process of the invention is between 15.0% and 25.0% by weight, advantageously between 16.0% and 22.0%, advantageously between 16.2% and 21.7% by weight relative to the total weight of the dry matter of the paper.
Selon un mode de réalisation particulier, la teneur en monosaccharides du papier obtenu selon le procédé de l'invention est comprise entre 15,0% et 25,0% en poids, avantageusement entre 16,0% et 22,0%, avantageusement entre 18,0% et 21,0% en poids, avantageusement de 20,7% en poids par rapport au poids total de la matière sèche du papier. According to a particular embodiment, the monosaccharide content of the paper obtained according to the process of the invention is between 15.0% and 25.0% by weight, advantageously between 16.0% and 22.0%, advantageously between 18.0% and 21.0% by weight, advantageously 20.7% by weight relative to the total weight of the dry matter of the paper.
Selon un mode de réalisation particulier, le papier obtenu selon le procédé de l'invention comprend : According to a particular embodiment, the paper obtained according to the method of the invention comprises:
- une teneur en matière minérale d'au moins 20,0% en poids, avantageusement au moins 25,0% en poids, avantageusement au moins 29,0% en poids, - a mineral matter content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 29.0% by weight,
- une teneur en en fucoïdane comprise entre 15,0% et 25,0% en poids, avantageusement entre 16,0% et 22,0%, avantageusement entre 16,2% et 21,7% en poids, - a fucoidan content of between 15.0% and 25.0% by weight, advantageously between 16.0% and 22.0%, advantageously between 16.2% and 21.7% by weight,
- une teneur en alginate inférieure à 1,0% en poids, - an alginate content of less than 1.0% by weight,
- une teneur en polysaccharides cellulosiques d'au moins 20,0% en poids, avantageusement au moins 25,0% en poids, avantageusement au moins 26,0% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche du papier. - a cellulosic polysaccharide content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 26.0% by weight, each percentage being expressed by weight relative to the total weight of the paper dry matter.
Selon un mode de réalisation particulier, le papier obtenu selon le procédé de l'invention contient :
- une teneur en matière minérale d'au moins 20,0% en poids, avantageusement au moins 25,0% en poids, avantageusement au moins 29,0% en poids, According to a particular embodiment, the paper obtained according to the process of the invention contains: - a mineral matter content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 29.0% by weight,
- une teneur en en fucoïdane comprise entre 15,0% et 25,0% en poids, avantageusement entre 16,0% et 22,0%, avantageusement entre 16,2% et 21,7% en poids, - a fucoidan content of between 15.0% and 25.0% by weight, advantageously between 16.0% and 22.0%, advantageously between 16.2% and 21.7% by weight,
- une teneur en alginate inférieure à 1,0% en poids, et - an alginate content of less than 1.0% by weight, and
- une teneur en polysaccharides cellulosiques d'au moins 20,0% en poids, avantageusement au moins 25,0% en poids, avantageusement au moins 26,0% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche du papier. - a cellulosic polysaccharide content of at least 20.0% by weight, advantageously at least 25.0% by weight, advantageously at least 26.0% by weight, each percentage being expressed by weight relative to the total weight of the paper dry matter.
Selon un mode de réalisation particulier, le papier obtenu selon le procédé de l'invention comprend : According to a particular embodiment, the paper obtained according to the method of the invention comprises:
- une teneur en matière minérale de 29,9% en poids, - a mineral content of 29.9% by weight,
- une teneur en en fucoïdane comprise entre 16,2% et 21,7% en poids, - a fucoidan content of between 16.2% and 21.7% by weight,
- une teneur en alginate inférieure à 1,0% en poids, et - an alginate content of less than 1.0% by weight, and
- une teneur en polysaccharides cellulosiques de 26,8% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche du papier. - a cellulosic polysaccharide content of 26.8% by weight, each percentage being expressed by weight relative to the total weight of the dry matter of the paper.
Selon un mode de réalisation particulier, le papier obtenu selon le procédé de l'invention contient : According to a particular embodiment, the paper obtained according to the process of the invention contains:
- une teneur en matière minérale de 29,9% en poids, - a mineral content of 29.9% by weight,
- une teneur en en fucoïdane comprise entre 16,2% et 21,7% en poids, - a fucoidan content of between 16.2% and 21.7% by weight,
- une teneur en alginate inférieure à 1,0% en poids, et - an alginate content of less than 1.0% by weight, and
- une teneur en polysaccharides cellulosiques de 26,8% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche du papier. - a cellulosic polysaccharide content of 26.8% by weight, each percentage being expressed by weight relative to the total weight of the dry matter of the paper.
Avantageusement, le papier selon l'invention peut être un papier fin ayant une main supérieure ou égale à lcm3/g. Avantageusement, le papier selon l'invention peut avoir un grammage supérieur à 80g/m2 et une opacité supérieure ou égale à 95%. Avantageusement, le papier selon l'invention peut avoir un grammage supérieur à 90 g/m2, avantageusement supérieur à 100g/m2, avantageusement
supérieur à 110g/m2, avantageusement supérieur à 120g/m2, avantageusement supérieur à 130g/m2, avantageusement supérieur à 140g/m2, avantageusement supérieur à 150g/m2, avantageusement supérieur à 160g/m2, avantageusement supérieur à 170g/m2, avantageusement supérieur à 180g/m2, avantageusement supérieur à 190g/m2, avantageusement supérieur à 200g/m2, avantageusement supérieur à 210g/m2, avantageusement supérieur à 220g/m2, avantageusement supérieur à 230g/m2, avantageusement supérieur à 240g/m2, avantageusement supérieur à 250g/m2, avantageusement supérieur à 260g/m2, avantageusement supérieur à 270g/m2, avantageusement supérieur à 280g/m2, avantageusement supérieur à 290g/m2, avantageusement supérieur à 300g/m2. Avantageusement, le papier selon l'invention peut avoir un grammage compris entre 80g/m2 et 300 g/m2. Advantageously, the paper according to the invention can be a thin paper having a bulk greater than or equal to 1 cm 3 /g. Advantageously, the paper according to the invention can have a basis weight greater than 80 g/m 2 and an opacity greater than or equal to 95%. Advantageously, the paper according to the invention can have a basis weight greater than 90 g/m 2 , advantageously greater than 100 g/m 2 , advantageously greater than 110g/m 2 , advantageously greater than 120g/m 2 , advantageously greater than 130g/m 2 , advantageously greater than 140g/m 2 , advantageously greater than 150g/m 2 , advantageously greater than 160g/m 2 , advantageously greater than 170g/m 2 , advantageously greater than 180g/m 2 , advantageously greater than 190g/m 2 , advantageously greater than 200g/m 2 , advantageously greater than 210g/m 2 , advantageously greater than 220g/m 2 , advantageously greater than 230g/m m 2 , advantageously greater than 240g/m 2 , advantageously greater than 250g/m 2 , advantageously greater than 260g/m 2 , advantageously greater than 270g/m 2 , advantageously greater than 280g/m 2 , advantageously greater than 290g/m 2 , advantageously greater than 300 g/m 2 . Advantageously, the paper according to the invention can have a weight of between 80 g/m 2 and 300 g/m 2 .
Ce papier peut être utilisé pour l'impression, l'écriture, la brochure ou l'emballage. This paper can be used for printing, writing, brochure or packaging.
Un autre aspect de l'invention concerne l'utilisation de la pâte à papier selon l'invention pour la préparation d'une feuille de papier et/ou de carton. Another aspect of the invention relates to the use of the paper pulp according to the invention for the preparation of a sheet of paper and/or cardboard.
Selon un mode de réalisation avantageux de l'invention, la pâte à papier peut être utilisée pour la préparation de papiers à usage graphique, tels que le papier journal, les papiers d'impression-écriture comme par exemple les carnets, les cahiers, les livres, les magazines, le papier de photocopie, les enveloppes, les billets, les cartes, les catalogues de ventes par correspondance, les documents publicitaires, les papiers pour la décoration, le papier non couché et le papier couché, la liste n'étant pas limitative. According to an advantageous embodiment of the invention, the paper pulp can be used for the preparation of papers for graphic use, such as newsprint, printing-writing papers such as for example notebooks, exercise books, books, magazines, copy paper, envelopes, tickets, cards, mail order catalogs, advertising materials, decorative papers, uncoated paper and coated paper, the list not being not limiting.
Selon un mode de réalisation avantageux de l'invention, la pâte à papier peut être utilisée pour la préparation d'emballages en papiers et cartons, tels que des boites, des étuis, des sacs, des emballages souples, des présentoirs, des boîtes pâtissières, des étuis pour parfum, des boîtes pour cigarettes, des tubes ou fûts pour produits pondéraux, des blisters, des présentoirs pour la distribution, des récipients alimentaires, des récipients non alimentaire, la liste n'étant pas limitative. According to an advantageous embodiment of the invention, the paper pulp can be used for the preparation of paper and cardboard packaging, such as boxes, cases, bags, flexible packaging, displays, pastry boxes , cases for perfume, boxes for cigarettes, tubes or barrels for weight products, blisters, displays for distribution, food containers, non-food containers, the list not being exhaustive.
Un autre aspect de l'invention concerne l'utilisation de la pâte à papier selon l'invention pour la préparation de tous types d'objets tridimensionnels,
notamment des objets obtenus par thermoformage, par moulage, par emboutissage, la liste n'étant pas limitative. Another aspect of the invention relates to the use of the paper pulp according to the invention for the preparation of all types of three-dimensional objects, in particular objects obtained by thermoforming, by molding, by stamping, the list not being exhaustive.
Un autre aspect de l'invention concerne l'utilisation de la pâte à papier selon l'invention pour la préparation de tous types d'objets tridimensionnels en cellulose, notamment des objets obtenus par thermoformage, par moulage, par emboutissage, la liste n'étant pas limitative. Another aspect of the invention relates to the use of the paper pulp according to the invention for the preparation of all types of three-dimensional cellulose objects, in particular objects obtained by thermoforming, by molding, by stamping, the list no not being limiting.
EXEMPLES EXAMPLES
1 : Caractérisation de la Date à DaDier selon l'invention1: Characterization of the DaDier Date according to the invention
Les algues brunes du genre Sargassum, en particulier des espèces Sargassum natans et Sargassum fluitans sont récoltées directement dans la mer. Brown algae of the genus Sargassum, in particular of the species Sargassum natans and Sargassum fluitans are harvested directly from the sea.
Les algues sont ensuite traitées avec une dose et demi de cristaux de soude pour 10 doses d'eau, puis le mélange est mis à cuire pendant 2 heures à une température de 60°C. Une fois la cuisson terminée, le mélange est mis à refroidir puis mixer très finement. La mixture est ensuite filtrée au travers d'un tissu, afin de recueillir la pâte d'algues dépourvue d'eau. La pâte d'algues est ensuite rincée deux fois avec de l'eau de mer, puis placée au repos pendant une heure. The algae are then treated with one and a half doses of soda crystals for 10 doses of water, then the mixture is cooked for 2 hours at a temperature of 60°C. Once the cooking is finished, the mixture is left to cool and then mix very finely. The mixture is then filtered through a cloth to collect the waterless seaweed paste. The seaweed paste is then rinsed twice with seawater, then left to rest for one hour.
La composition en monosaccharides et acides uroniques a été analysée par HPLC après une étape de méthanolyse contrôlée. The composition of monosaccharides and uronic acids was analyzed by HPLC after a controlled methanolysis step.
Les teneurs en monosacchariques/acides uroniques sont données avec une incertitude relative de ± 20% tenant compte de la reproductibilité et de la répétabilité de l'analyse. Les résultats d'analyse de la composition en polysaccharides sont ensuite interprétés afin de remonter à la composition en polysaccharides de la matrice et à une estimation des teneurs en alginates (acides mannuronique + guluronique) et en fucoïdanes. The monosaccharide/uronic acid contents are given with a relative uncertainty of ± 20% taking into account the reproducibility and repeatability of the analysis. The polysaccharide composition analysis results are then interpreted in order to trace the polysaccharide composition of the matrix and an estimate of the alginate (mannuronic + guluronic acid) and fucoidan contents.
En parallèle une seconde analyse a été réalisée par HPLC après hydrolyse chimique. Cette méthode permet de doser successivement les glucanes facilement hydrolysables et le glucose total après une hydrolyse poussée, incluant la cellulose.
Par ailleurs, la teneur en protéine a été déterminée via la méthode de Kjeldahl qui permet de déterminer la teneur en azote totale dans un échantillon. In parallel, a second analysis was carried out by HPLC after chemical hydrolysis. This method makes it possible to successively measure easily hydrolyzable glucans and total glucose after extensive hydrolysis, including cellulose. In addition, the protein content was determined using the Kjeldahl method which makes it possible to determine the total nitrogen content in a sample.
Tableau 1 : Comparaison des échantillons d'algues séchée et de pâte à papier selon l'invention exprimée sur la matière sèche
L.D : limite de détection <0,1
Exemple 2 : Caractérisation du papier selon l'invention Table 1: Comparison of samples of dried algae and paper pulp according to the invention expressed on the dry matter LoD: detection limit <0.1 Example 2: Characterization of the paper according to the invention
A partir de la pâte à papier obtenu à l'exemple 1, on mélange la pâte à papier à de l'eau, afin d'obtenir une pâte à papier diluée homogène. La pâte à papier diluée est ensuite répartie sur un tamis, puis égouttée pendant 10 minutes pour éliminer l'eau. La pâte est ensuite transférée sur une toile de feutre, puis mise à sécher à l'air libre pendant 3 jours et ensuite, délicatement décollée du tamis.From the paper pulp obtained in Example 1, the paper pulp is mixed with water, in order to obtain a homogeneous diluted paper pulp. The diluted pulp is then spread over a sieve and then drained for 10 minutes to remove the water. The paste is then transferred to a felt cloth, then left to dry in the open air for 3 days and then gently removed from the sieve.
La composition en monosaccharides et acides uroniques a été analysée par HPLC après une étape de méthanolyse contrôlée. The composition of monosaccharides and uronic acids was analyzed by HPLC after a controlled methanolysis step.
Les teneurs en monosacchariques/acides uroniques sont données avec une incertitude relative de ± 20% tenant compte de la reproductibilité et de la répétabilité de l'analyse. Les résultats d'analyse de la composition en polysaccharides sont ensuite interprétés afin de remonter à la composition en polysaccharides de la matrice et à une estimation des teneurs en alginates (acides mannuronique + guluronique) et en fucoïdanes. The monosaccharide/uronic acid contents are given with a relative uncertainty of ± 20% taking into account the reproducibility and repeatability of the analysis. The polysaccharide composition analysis results are then interpreted in order to trace the polysaccharide composition of the matrix and an estimate of the alginate (mannuronic + guluronic acid) and fucoidan contents.
En parallèle une seconde analyse a été réalisée par HPLC après hydrolyse chimique. Cette méthode permet de doser successivement les glucanes facilement hydrolysables et le glucose total après une hydrolyse poussée, incluant la cellulose. In parallel, a second analysis was carried out by HPLC after chemical hydrolysis. This method makes it possible to successively measure easily hydrolyzable glucans and total glucose after extensive hydrolysis, including cellulose.
Par ailleurs, la teneur en protéine a été déterminée via la méthode de Kjeldahl qui permet de déterminer la teneur en azote totale dans un échantillon. In addition, the protein content was determined using the Kjeldahl method which makes it possible to determine the total nitrogen content in a sample.
Tableau 2 : Comparaison des échantillons de pâte à papier selon l'invention et de feuille de papier selon l'invention exprimée sur la matière sèche
Table 2: Comparison of samples of paper pulp according to the invention and of sheet of paper according to the invention expressed on the dry matter
L.D : limite de détection <0,1
L.D: detection limit <0.1
Claims
REVENDICATIONS
1. Pâte à papier comprenant : 1. Pulp including:
- une teneur en matière minérale d'au moins 30% en poids, - a mineral content of at least 30% by weight,
- une teneur en polysaccharides non cellulosiques d'au moins 10% en poids, et - a content of non-cellulosic polysaccharides of at least 10% by weight, and
- une teneur en polysaccharides cellulosiques d'au moins 8% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier, caractérisée en ce que les polysaccharides non cellulosiques comprennent du fucoïdane et des alginates et en ce que la pâte à papier est obtenue à partir d'une algue brune du genre Sargassum. - a cellulosic polysaccharide content of at least 8% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp, characterized in that the non-cellulosic polysaccharides comprise fucoidan and alginates and in that the pulp is obtained from a brown seaweed of the genus Sargassum.
2. Pâte à papier selon la revendication 1, dans laquelle la teneur en fucoïdane est d'au moins 7,0% en poids et la teneur en alginate est d'au moins 3,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. 2. Pulp according to claim 1, wherein the fucoidan content is at least 7.0% by weight and the alginate content is at least 3.0% by weight based on the total weight of the pulp. dry matter contained in the pulp.
3. Pâte à papier selon l'une des revendications 1 à 2, dans laquelle la teneur en mannitol est inférieure à 1,0% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. 3. Paper pulp according to one of claims 1 to 2, in which the mannitol content is less than 1.0% by weight relative to the total weight of the dry matter contained in the paper pulp.
4. Pâte à papier selon la revendication 3, dans laquelle la teneur en mannitol est inférieure à 0,1% en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. 4. Paper pulp according to claim 3, in which the mannitol content is less than 0.1% by weight relative to the total weight of the dry matter contained in the paper pulp.
5. Pâte à papier selon la revendication 1, caractérisée en ce que l'algue brune du genre Sargassum est choisi parmi les espèces Sargassum fluitans, Sargassum natans ou un mélange de ces deux espèces. 5. Pulp according to claim 1, characterized in that the brown alga of the genus Sargassum is chosen from the species Sargassum fluitans, Sargassum natans or a mixture of these two species.
6. Pâte à papier selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle comprend : 6. Paper pulp according to any one of claims 1 to 5, characterized in that it comprises:
- une teneur en matière minérale comprise entre 40% et 60% en poids,- a mineral content of between 40% and 60% by weight,
- une teneur en polysaccharides non cellulosiques comprise entre 10% et 20% en poids, et
- une teneur en polysaccharide cellulosique comprise entre 8% et 15% en poids, chaque pourcentage étant exprimé en poids par rapport au poids total de la matière sèche contenue dans la pâte à papier. Pâte à papier selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comprend en outre des fibres de cellulose issues de bois et/ou de plantes. Pâte à papier selon la revendication 7, dans laquelle la teneur en fibres de cellulose issues de bois et/ou de plantes est inférieure ou égale à 15% poids par rapport au poids total de la pâte à papier. Procédé de fabrication d'une pâte à papier à partir d'algues brunes selon l'une des revendications 1 à 8, caractérisé en ce qu'il comprend les étapes consistant à : a) récolter les algues brunes, b) traiter les algues brunes avec un agent alcalin, c) chauffer le mélange de l'étape b) à une température et pendant une durée prédéfinie, d) mixer le mélange issu de l'étape c), afin d'obtenir une pâte d'algues, e) filtrer et récupérer la pâte d'algues. Procédé de fabrication d'un papier, obtenu à partir d'une pâte à papier préparée selon le procédé de la revendication 9, caractérisé en ce qu'il comprend les étapes consistant à : a) mélanger la pâte à papier à de l'eau, afin d'obtenir une pâte à papier diluée, b) répartir la pâte à papier diluée sur un tamis, c) égoutter la pâte à papier diluée, et d) laisser sécher la pâte à papier diluée, et récupérer la feuille de papier ainsi formée. Papier obtenu selon le procédé de la revendication 10, caractérisé en ce qu'il comprend une teneur en matière minérale d'au moins 20,0% en poids
et en ce que la teneur en alginate est inférieure à 1,0% en poids, les pourcentages étant exprimé par rapport au poids total de la matière sèche du papier. 12. Utilisation de la pâte à papier selon l'une quelconque des revendications 1 à 8, pour la préparation d'une feuille de papier et/ou de carton. - a content of non-cellulosic polysaccharides of between 10% and 20% by weight, and - a cellulosic polysaccharide content of between 8% and 15% by weight, each percentage being expressed by weight relative to the total weight of the dry matter contained in the paper pulp. Paper pulp according to any one of Claims 1 to 6, characterized in that it also comprises cellulose fibers derived from wood and/or plants. Paper pulp according to Claim 7, in which the content of cellulose fibers derived from wood and/or plants is less than or equal to 15% by weight relative to the total weight of the paper pulp. Process for the manufacture of a paper pulp from brown algae according to one of Claims 1 to 8, characterized in that it comprises the steps consisting in: a) harvesting the brown algae, b) treating the brown algae with an alkaline agent, c) heating the mixture from step b) to a predefined temperature and for a predefined time, d) mixing the mixture resulting from step c), in order to obtain an algae paste, e) filter and recover the seaweed paste. Process for the manufacture of a paper, obtained from a paper pulp prepared according to the process of claim 9, characterized in that it comprises the steps consisting in: a) mixing the paper pulp with water , in order to obtain a diluted paper pulp, b) spreading the diluted paper pulp on a sieve, c) draining the diluted paper pulp, and d) allowing the diluted paper pulp to dry, and recovering the sheet of paper as well formed. Paper obtained according to the process of claim 10, characterized in that it comprises a mineral matter content of at least 20.0% by weight and in that the alginate content is less than 1.0% by weight, the percentages being expressed relative to the total weight of the dry matter of the paper. 12. Use of the paper pulp according to any one of claims 1 to 8, for the preparation of a sheet of paper and / or cardboard.
13. Utilisation de la pâte à papier selon l'une quelconque des revendications 1 à 8, pour la préparation de tous types d'objets tridimensionnels.
13. Use of the paper pulp according to any one of claims 1 to 8, for the preparation of all types of three-dimensional objects.
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| Application Number | Priority Date | Filing Date | Title |
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| FR2012717 | 2020-12-04 | ||
| FR2012717A FR3117135B1 (en) | 2020-12-04 | 2020-12-04 | Pulp and its uses |
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| WO2022117809A1 true WO2022117809A1 (en) | 2022-06-09 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0488486A1 (en) | 1990-11-29 | 1992-06-03 | Mitsubishi Jukogyo Kabushiki Kaisha | Method of producing pulp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0488486A1 (en) | 1990-11-29 | 1992-06-03 | Mitsubishi Jukogyo Kabushiki Kaisha | Method of producing pulp |
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