Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L89/00—Compositions of proteins; Compositions of derivatives thereof
  • C08L89/005—Casein
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/18—Manufacture of films or sheets
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0016—Plasticisers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/05—Alcohols; Metal alcoholates
  • C08K5/053—Polyhydroxylic alcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/10—Esters; Ether-esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2300/00—Characterised by the use of unspecified polymers
  • C08J2300/16—Biodegradable polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2300/00—Characterised by the use of unspecified polymers
  • C08J2300/22—Thermoplastic resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2389/00—Characterised by the use of proteins; Derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2201/00—Properties
  • C08L2201/06—Biodegradable
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2203/00—Applications
  • C08L2203/16—Applications used for films
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
  • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation

Definitions

• thermoplastic, biodegradable and biobased materials more specifically that of casein-based thermoplastics and / or caseinate.
• thermoplastic material biodegradable, comprising
• casein and / or caseinate preferably between 55 and 70%
• the subject of the invention is also the thermoplastic material, which is biodegradable in various different forms, in particular in the form of granules constituting a raw material for its transformation into various objects, such as films, wires or molded articles.
• the invention also relates to a packaging film obtained from this thermoplastic material, and more specifically, a packaging of hygroscopic products, such as detergent tablets, made from this film.
• biodegradable materials are developed. These new materials can be made from polymers of natural origin or synthetic polymers. For example, vegetable proteins, such as corn and soy protein, or animal proteins can be used to make packaging. Among animal proteins, casein is particularly interesting. Indeed, this protein derived from milk is available in large quantities and the casein-based films have good transparency and good biodegradability.
• thermoplastic granules based on casein and / or caseinate and their manufacturing process. These granules can be used to make thermoplastic films.
• these thermoplastic films are not easily exploitable industrially. For example, the film is sometimes sticky, so it is difficult, if not impossible, to unwind film reels using industrial equipment because the different layers stick together.
• these films are used to pack detergent tablets and these tablets are stored under conditions of low relative humidity (for example 30%), they can sometimes become brittle and tear, so as not to play then their role of packaging.
• the present invention aims to satisfy at least one of the following objectives.
• thermoplastic material biodegradable, based on casein and / or caseinate which can be used industrially, that is to say, in particular transformable semi-finished product or product , simple or complex form, by techniques such as injection, extrusion, extrusion-inflation, the solvent path (in English "solvent cast”), thermoforming or machining.
• Another essential object of the invention is the provision of a film of thermoplastic material, biodegradable, based on casein and / or caseinate which can be reeled and which is unrollable.
• thermoplastic material film biodegradable, based on casein and / or caseinate, which can be used, in particular, for packaging hygroscopic products, such as detergent tablets.
• casein and / or caseinate preferably between 52 and 75%, and more preferably between 55 and 70%;
• a hydrophobic agent preferably between 0.5 and 6%, and more preferably between 1 and 4%;
• thermoplastic material as described above is exploitable industrially. Indeed, this material makes it possible to obtain a film that can be reeled and then unrolled easily.
• This industrial winding / unwinding ability is a key parameter of the film made from the thermoplastic casein material and according to the invention.
• this film can be used to package various products such as hygroscopic products, such as detergent tablets, because even when the tablets are stored under conditions of low relative humidity, the film retains its integrity.
• the produced film is edible. It can therefore be used for various applications such as the packaging of products, ingredients or food additives, edible packaging, single-dose food ingredients to dissolve, single-dose food additives. It can also be used as a separator sheet.
• FIGS. 1A and 1B are photographs of a non-unrollable film reel according to Comparative Example 1.
• FIGS. 2A, 2B and 2C are photographs of an unwinding film reel according to example 4.
• Figs. 3A and 3B are photos of detergent tablets wrapped in a film according to Comparative Example 1 after a 5 day conditioning test.
• Figure 4 is a photograph of a detergent tablet wrapped in a film according to Example 4 after a 5-day conditioning test.
• Photos 5A and 5B are photos of detergent tablets wrapped with a printed film according to Example 5 after a 5-day conditioning test.
• Figure 6 is a photograph of the unwind test facility used for evaluation of films made from casein thermoplastic materials in the examples.
• the photos 7A and 7B are photos of the parts obtained by injection, from biodegradable thermoplastic granules according to Example 4.
• thermoplastic is meant, for example, a material that becomes malleable and pliable above a given temperature, the glass transition temperature Tg, but below this Tg becomes hard, these transformations being reversible.
• biodegradable is meant, for example, a material that can be decomposed under the action of microorganisms (bacteria, fungi, algae ). The result of this decomposition is the formation of water, CO 2 and / or methane and possibly by-products (residues, new biomass) that are not toxic to the environment.
• biodegradable material according to the European standard EN NF 13432.
• between x and y is meant, for example, that the bounds x and y are included in the interval [x, y].
• water-soluble is meant, for example, that which dissolves in water.
• the water solubility of a film can be measured in the following way: a piece of film (5 cm x 5 cm, cut with a punch) is fixed on a slide holder then is immersed in a beaker of 1000 ml of capacity , containing 600 ml of distilled water at 20 ° C with stirring, with a magnetic bar, at 300 rpm. The time the film takes to break through is measured. The disintegration of the film causes the formation of film particles. The test lasts 5 minutes after which the particles are passed through a 0.5 mm sieve to check the particle size. When there are no particles in the sieve, the film is considered water soluble.
• plasticizer is meant, for example, a substance for lowering the glass transition temperature Tg of the material.
• detergent is meant, for example, a composition which has cleaning properties.
• the detergents there may be mentioned products in the form of powder or compacted powder for dishwashers and detergents.
• hydrophobic is meant, for example, a compound having little affinity with water and having a tendency not to dissolve therein. Typically, it is a predominantly apolar compound.
• hydrophilic is meant, for example, a compound having an affinity for water and having a tendency to dissolve therein. Typically, it is a compound having polar groups capable of forming hydrogen bonds.
• surfactant is meant, for example, an amphiphilic molecule, that is to say a molecule having both hydrophilic and hydrophobic properties.
• HLB hydrophilic-lipophilic balance (in English: hydrophiliclipophilia balance).
• sequestering agent is meant, for example, ligands which form chemical complexes with metal ions such as copper, iron, nickel, calcium and magnesium.
• fatty acid is meant, for example, an aliphatic mono carboxylic acid.
• the proportions of the various constituents a), b), c), d) e), and optionally f) and g), are expressed in% by weight relative to the total mass of the thermoplastic material at room temperature.
• the biodegradable thermoplastic material may be water soluble.
• the biodegradable thermoplastic material can be printable and / or printed.
• the thermoplastic material comprises a) between 50 and 80%, preferably between 52 and 75%, and more preferably between 55 and 70%, or more preferably between 60 and 65%, of casein and / or caseinate.
• Casein is a protein derived from milk that is poorly soluble in water. It is mainly obtained by precipitation by adding acid (acid casein) or rennet (rennet casein) to the milk. Casein consists of a mixture of casein A, casein b and casein k having molar masses of between 19000 and 25000g / mol. Caseinate means, for example, a casein salt whose contranion is chosen from group consisting of - preferably composed of - calcium, potassium, ammonium, sodium and magnesium.
• thermoplastic material a) comprises at least one casein.
• thermoplastic material comprises at least one caseinate, for example a sodium caseinate, or a mixture of caseinates.
• thermoplastic material comprises a mixture of casein and at least one caseinate.
• the mass ratio between the casein and the caseinate (s) can be between 5/95 and 95/5, 20/80 and 80/20 or 40/60 and 60/40.
• the thermoplastic material comprises b) between 4 and 13% water, preferably between 4.5 and 12%, and more preferably between 5 and 11%, or more preferably between 7 and 10.5%, of water.
• the water acts as a plasticizer which must be distinguished from the plasticizer c) used in the composition of the thermoplastic material according to the invention.
• the latter in fact comprises c) between 10 and 35%, preferably between 12 and 32%, and more preferably still between 15 and 28%, or better still between 20 and 25%, of at least one plasticizer. different from b).
• This plasticizer c) may be chosen from polyols, glycerol acetates, glycerol propionates and mixtures thereof.
• polyols there may be mentioned glycerol, hexanetriol, glycols, including ethylene glycol, and sugars and their derivatives.
• sugars examples include disaccharides, such as maltose, lactose, sucrose and monosaccharides such as fructose.
• the derivatives of sugars mention may be made of their hydrogenated derivatives such as sorbitol, maltitol, mannitol, and xylitol, or else the products of transformation of these hydrogenated derivatives such as sorbitan.
• the plasticizer c) is chosen from glycerol, sorbitol, mannitol, ethylene glycol and mixtures thereof.
• the plasticizer c) is glycerol.
• the plasticizer c) may contain residual water.
• the plasticizer c) makes it possible to lower the viscosity of the product by increasing the mobility of the molecular chains.
• the plasticizer c) is a hydrophilic plasticizer.
• the thermoplastic material comprises d) between 0.1 and 8%, preferably between 0.5 and 6%, and more preferably between 1 and 4%, or more preferably between 1 and 3%, of a hydrophobic agent. d).
• the hydrophobic agent d) can be chosen from
• the C3-C33 carboxylic acids preferably the C4-C28 fatty acids, and even more preferably the unsaturated C6-C28 fatty acids and mixtures thereof.
• the polycarboxylic acid esters may be derived from at least one polycarboxylic acid and at least one alcohol, preferably a C1-Cl 8 alcohol.
• carboxylic polyacids preferentially selected in the context of the invention, mention may be made of citric acid, citric hydroxy acid, tartaric acid, malic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid.
• C 2 -C 6 alkols for example ethanol, propanol, propanol, t-butanol and tert-butanol.
• the hydrophobic agent d) is chosen from triethyl citrate, tributyl O-acetyl citrate, tributyl citrate and mixtures thereof.
• the hydrophobic agent d) is a C3-C33 carboxylic acid, preferably a C4-C28 fatty acid, and even more preferably a C6-C28 unsaturated fatty acid.
• caprylic acid Among the C4-C28 fatty acids retained in the context of the invention, there may be mentioned caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and their mixtures.
• C6-C28 fatty acids that may be mentioned are palmitoleic acid, oleic acid, linoleic acid, and mixtures thereof.
• the thermoplastic material comprises e) between 0.5 and 6%, preferably between 1 and 5%, and more preferably between 1.5 and 4.5%, or more preferably between 2 and 4%, from less a surfactant.
• the surfactant e) is chosen from zwitterionic surfactants whose HLB is between 2 and 8.
• the preferred surfactants include lecithin and / or its analogs such as diacetylenic phosphonates.
• the ratio of the amounts of e) to d) is greater than or equal to 1.
• this ratio can be between 1.3 and 3; preferably between 1.5 and 2.5.
• said material comprises between 1 and 5% of an additive f) chosen from sequestering agents.
• sequestering agents mention may be made of diammonium citrate, EDTA, phosphates, citric acid, pyrophosphates, and mixtures thereof.
• thermoplastic material said material also comprises an additive g) chosen from dyes, protein coagulants, anti-caking agents, slip agents and mixtures thereof.
• coagulants mention may be made of citric acid and acetic acid.
• anti-caking agents mention may be made of colloidal silica.
• slip agents mention may be made of polyethylene glycols and fatty-chain compounds, preferably of C 12 -C 28, having an amide terminus.
• release agents mention may be made of polyvinyl alcohol.
• the biodegradable thermoplastic material may comprise between 0.1% and 5% of g).
• said material comprises
• casein and / or caseinate preferably between 52 and 75%, and more preferably between 55 and 70%, or more preferably between 60 and 65%;
• glycerol preferably between 12 and 32%, and more preferably still between 15 and 28%, or better still between 20 and 25%;
• the biodegradable thermoplastic material consists solely of components that can be used in the food industry, that is to say components included in the codex alimentarius.
• the biodegradable thermoplastic material is edible, that is to say that it can be eaten without risk to humans.
• the biodegradable thermoplastic material is constituted
• thermoplastic material is edible.
• the biodegradable thermoplastic material is in the form of granules or in the form of a film.
• the invention therefore also relates to the granules of the thermoplastic material as described above.
• the invention also relates to granules comprising:
• casein and / or caseinate preferably between 52 and 75%, and more preferably between 55 and 70%, or more preferably between 60 and 65%;
• a hydrophobic agent preferably between 0.5 and 6%, and more preferably between 1 and 4%, or between 1 and 3%; e) between 0.5 and 6% of at least one surfactant, preferably between 1 and 5%, and more preferably between 1.5 and 4.5%, or more preferably between 2 and 4%.
• said granule comprises
• casein and / or caseinate preferably between 52 and 75%, and more preferably between 55 and 70%, or more preferably between 60 and 65%;
• water preferably between 4 and 13% water, preferably between 4.5 and 12%, and more preferably between 5 and 11%, or more preferably between 7 and 10.5%;
• glycerol preferably between 12 and 32%, and more preferably still between 15 and 28%, or better still between 20 and 25%;
• lecithin between 0.5 and 6% of lecithin, preferably between 1 and 5%, and more preferably between 1.5 and 4.5%, or more preferably between 2 and 4%.
• the granule is water soluble.
• the granule can be edible.
• the invention also relates to an object that can be obtained after transformation by cast extrusion (in French “extrusion flat die”), extrusion blow molding, extrusion inflation, solvent route (in English “solvent cast”), calendering, injection, thermoforming or spinning the thermoplastic material as described above.
• thermoplastic material As described above, there may be mentioned films that can be obtained from the thermoplastic material as described above.
• the invention also relates to a film obtained from the thermoplastic material as described above.
• the film can be obtained, for example, by extrusion inflating granules of the thermoplastic material as described above.
• the film is a biodegradable thermoplastic film.
• the film can be printed. Typically, the film has a thickness of between 15 and 100 microns, preferably between 30 and 80 microns and more preferably between 40 and 70 microns.
• the film can be printed directly before winding or in a second step of unwinding, cutting and rewinding by a conventional method of printing in plastics such as flexography.
• the invention also relates to a film comprising
• casein and / or caseinate preferably between 52 and 75%, and more preferably between 55 and 70%, or more preferably between 60 and 65%;
• a hydrophobic agent preferably between 0.5 and 6%, and more preferably between 1 and 4%, or between 1 and 3%; e) between 0.5 and 6% of at least one surfactant, preferably between 1 and 5%, and more preferably between 1.5 and 4.5%, or more preferably between 2 and 4%.
• said film comprises
• casein and / or caseinate preferably between 52 and 75%, and more preferably between 55 and 70%, or more preferably between 60 and 65%;
• glycerol preferably between 12 and 32%, and more preferably still between 15 and 28%, or better still between 20 and 25%;
• lecithin between 0.5 and 6% of lecithin, preferably between 1 and 5%, and more preferably between 1.5 and 4.5%, or more preferably between 2 and 4%.
• the film is water soluble.
• the film can be edible.
• the film can be heat shrinkable.
• the subject of the invention is also the use of a thermoplastic material, for example a film, as described above for packaging various products (pharmaceuticals, foodstuffs, chemicals, cosmetics, etc.), in particular hygroscopic products. , and more precisely still detergents.
• a thermoplastic material for example a film
• the product may be in solid or liquid form.
• the invention also relates to a product packaged with a thermoplastic material as described above, for example by a film as described above.
• the packaged product can be chosen from pharmaceutical, food, chemical and cosmetic products.
• the packaged product is a food product, such as for example meat, fish, vegetables, fruits, pastries, pastries, food additives, ingredients, dry preparations, food powders.
• the thermoplastic material used to package the food product is an edible film.
• the packaged product is a tablet of detergent.
• the packaged product is a liquid product, for example liquid shampoo or liquid laundry.
• the invention also relates to a detergent packaged with a thermoplastic material as described above, for example by a film as described above.
• the detergents can be in the form of liquid or powder, compact or not.
• it may be a tablet of detergent.
• Detergent tablets include dishwashing product tablets and laundry tablets.
• the invention relates to a method of manufacturing the thermoplastic material as described above.
• This method preferably comprises the following steps:
• step E1 consists of operating the extruder with the following parameters: rotational speed of between 100 and 150 rpm and at a temperature of between 70 and 120 ° C.
• Step E2 preferably consists of introducing, at the same time or successively, preferably successively,
• the compounds in solid form are compounds a) e); while the compounds in liquid form are the compounds b) c) & d).
• the invention relates to a method of packaging a product using a heat-shrinkable film as described above.
• the heat shrink can be performed by heat shrink techniques known to those skilled in the art.
• the product to be wrapped is wrapped in a piece of film, which is then heat sealed.
• the product to be packaged may be a tablet of compacted powder, such as a tablet of detergent.
• the film is heat-shrunk by passing an air stream at a temperature of between 80 ° C. and 200 ° C., preferably between 100 ° C. and 170 ° C., and even more preferably between 130 ° and 160 ° C. for a period of time. between 0.05 seconds and 60 seconds, preferably between 1 and 30 seconds, and more preferably between 2 and 10 seconds.
• the film then marries the shape of the packaged product.
• the film before heat-shrinking, is moistened with water or an equivalent liquid by means of a mist and / or a humidifier and / or a vaporizer for a duration ranging from 0.01 seconds to 60 minutes. seconds, on at least one of the two faces and / or around the tablet.
• Heat shrinkage can also be performed by placing the film in an oven whose relative humidity can be controlled.
• the relative humidity level may, for example, be between 10 and 80%, between 10 and 40%, or between 20 and 40%, or be greater than or equal to 30%.
• the method comprises the following steps:
• the extruder used to make the following examples is a Clextral® BC 21 co-rotating twin screw extruder, 25 mm in diameter, 21 mm spacing and 900 mm in length. This extruder has at least 4 zones:
• the rotational speed of the twin-screws is 125 rpm and the temperatures of the different zones are between 70 and 120 ° C.
• the first zone of the extruder is a zone of introduction of the powders: caseinate and lecithin.
• the liquids (plasticizers) are introduced into the second zone.
• the extruder further comprises a free-air degassing zone and a final zone consisting of a cylindrical rod die with a diameter of 4 mm.
• the screw profile is as follows:
• the rod is dried and introduced into a granulator to give granules of 2 to 3 mm in diameter.
• the granules are then transformed into an extrusion-inflation film.
• the extruder used is brand Diani®, it has a diameter of 30 mm and is equipped with an annular die 80 mm in diameter.
• the film produced is about 30 cm wide and 50 microns thick.
• the film obtained 1200 meters long is then rolled to form a coil. This film reel is then used to package detergent tablets.
• a piece of film of 107 mm x 70 mm is used to wrap a tablet of 37 mm x 27 mm x 15 mm.
• the film is then heat-sealed at its ends, longitudinally and transversely. Different film formulations have been tested to package tablets.
• FIG. 6 The installation used in this test is shown in FIG. 6. It comprises a coil (1) of film (2) to be tested (partially shown in FIG. 6). This film (2) passes over a cylinder (3) for returning, before being wound on a motor cylinder (4) having a diameter of 10 cm and a length of 30 cm, equipped with a force sensor (5) 50 newtons the ASA-RT brand.
• the force sensor (5) is used to measure the tension at the winder of the film during uncoiling.
• the driving cylinder (4) is rotated at a speed of 5 rpm, in order to unwind the film spool (1) (2).
• the force sensor (5) makes it possible to quantify the notion of "stickiness", which is an obstacle to industrial operation.
• the packaged detergent tablets are stored for 5 days at 30 ° C and 30% relative humidity. After that, each packaged tablet is grabbed with latex gloves, shaken three times by holding one end with dry gloved fingers and put in the palm of the gloved hand dry then the gloved dry fingers are closed on the tablet three times for the wrinkle. If the movie opens or breaks during this test, it is called 'brittle'.
• the film used for packaging the tablets shown in Figs. 5A and 5B (according to Example 5) is printed directly prior to the flexographic winding.
• Table 1 Tested formulations and results of the uncoiling and conditioning tests. Examples 1 to 3 are comparative examples, these films are not exploitable industrially, because they do not pass the unwinding test and / or the conditioning test.
• FIGs. 1A and 1B are pictures of a non-unrollable film reel according to Example 1.
• Examples 4 and 5 are examples according to the invention, these films pass the conditioning and unwinding tests, they can therefore be used industrially and be used to pack detergent tablets.
• FIGS. 2A, 2B and 2C are photographs of an unwinding film reel according to example 4.
• Figs. 3A and 3B are photos of detergent tablets wrapped with a film according to Example 1 after a 5-day conditioning test.
• Figure 4 is a photograph of a detergent tablet wrapped in a film according to Example 4 after a 5-day conditioning test.
• the packaging film is intact. It has no cracks.
• Photos 5A and 5B are photos of detergent tablets wrapped with a printed film according to Example 5 after a 5-day conditioning test.
• a piece of 5 cm x 5 cm film according to Example 5 is heat-shrunk in an oven, whose relative humidity can be controlled at 100 ° C for 30 seconds. The retraction rate in the longitudinal and transverse direction is then measured. The results are shown in Table 2.
• Biodegradable thermoplastic granules produced according to Example 4 above were used to manufacture injected parts.
• the cylinder and nozzle temperatures are set between 95 and 115 ° C.
• the temperature of the mold is 15 ° C and the injection speed: 20 mm / s.
• Photos 7A and 7B are pictures of the parts obtained by injection. These results show that it is possible to manufacture objects by injection from thermoplastic granules according to the invention.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Wrappers (AREA)
• Biological Depolymerization Polymers (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)

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Cited By (1)

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• 2017
  • 2017-12-19 FR FR1762549A patent/FR3075215B1/fr active Active
• 2018
  • 2018-12-19 KR KR1020207020778A patent/KR20200096646A/ko not_active Application Discontinuation
  • 2018-12-19 EP EP18842781.9A patent/EP3728477A1/de active Pending
  • 2018-12-19 CN CN201880082005.XA patent/CN111868174A/zh active Pending
  • 2018-12-19 JP JP2020554944A patent/JP7078746B2/ja active Active
  • 2018-12-19 US US16/956,364 patent/US20210079223A1/en active Pending
  • 2018-12-19 WO PCT/FR2018/053423 patent/WO2019122726A1/fr unknown

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