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WO2001032987A1 - Produits moules a base de fibres comprenant de l'amidon transforme et procede de fabrication correspondant - Google Patents

Produits moules a base de fibres comprenant de l'amidon transforme et procede de fabrication correspondant Download PDF

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Publication number
WO2001032987A1
WO2001032987A1 PCT/NL2000/000788 NL0000788W WO0132987A1 WO 2001032987 A1 WO2001032987 A1 WO 2001032987A1 NL 0000788 W NL0000788 W NL 0000788W WO 0132987 A1 WO0132987 A1 WO 0132987A1
Authority
WO
WIPO (PCT)
Prior art keywords
starch
additive
polymer
degradation product
moulded fibre
Prior art date
Application number
PCT/NL2000/000788
Other languages
English (en)
Inventor
Harald John Kuiper
Benno Alexander Koopmans
Original Assignee
Leopack B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leopack B.V. filed Critical Leopack B.V.
Priority to AU17393/01A priority Critical patent/AU1739301A/en
Publication of WO2001032987A1 publication Critical patent/WO2001032987A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch

Definitions

  • the present invention relates to moulded fibre products and their manufacture. More specifically, the invention relates to additives that can be incorporated into moulded fibre products during their manufacture and that provide advantages with respect to both the manufacturing process as well as the final articles obtained.
  • European patent 0 228 637 in the name of Chemische Fabrik Stockhausen discloses water soluble, kationic polyelectrolytes consisting of copolymers of acrylamide and dimethylaminopropylamide, that can be used as flocculants, in particular for sewage sludges resulting from waste water treatment.
  • the copolymers are powdery products, in which the dimethylaminopropylamide has been neutralised or quaternized with mineral acids, in which the quotient of the intrinsic viscosity of the copolymers divided by the molar ratio of acrylamide to dimethylaminopropylacrylamide is at least 200 ml/g, and in which the proportion of kationic monomers in the copolymer is between 4 and 80 mol. %.
  • these copolymers are preferably used in the form of an aqueous solution containing 0.1 to 0.3 % dissolved powdery polymer.
  • EP 0 228 637 further relates to a process for the preparation of such water-soluble kationic polyelectrolytes, in which the dimethylaminopropylacrylamide monomers are first neutralized or quaternized with a mineral acid, after which the acrylamide monomers are added and the resulting monomeric mixture is copolymerized.
  • the kationic polymer is a homopolymer or co-polymer containing at least 20% by weight of polymerised dialkylaminoalkyl(meth)acrylamide-units.
  • the starch or starch derivative is preferably an anionic starch or starch derivative.
  • the non-prepublished German application DE 198 32 241.0 also describes the preparation of these kationic polymer-modified starches.
  • moulded fibre products are formed from a pulp mass, for instance a pulp mass obtained by milling a fibre-containing material into individual fibres in water or an aqueous medium using a pulper or beater, usually at elevated temperatures of about 30 - 70 °C.
  • the fibre containing starting material can be fibrous wood or similar materials, but is usually sorted or even unsorted recycled fibre material such as waste paper, cardboard, etc. (sometimes referred to as "secondary fibre").
  • the pulp mass thus obtained may then be treated to remove both coarse and fine particulate matter (such as solid wastes, plastics, etc.) and may also be treated to remove contaminants such as ink, adhesives, etc.
  • the pulp may also be bleached, grinded/milled, subjected to de-inking, etc., and/or additives known per se may be added, such as couloring agents, paraffin, dewatering agents, retention agents, sizing agents, etc..
  • the fibrous slurry thus obtained is then formed into the final product article, i.e.
  • a vacuum forming process in which a suction mould (or in case of a two-part suction mould one half thereof) is submersed into the pulp mass, upon which a suitable amount of pulp is sucked onto the mould by application of a vacuum (usually through perforations in the mould).
  • pre-form the semi-formed article
  • pre-form the semi-formed article
  • the dried moulded fibre article thus obtained may then be used as such (for instance in the case of egg trays) or optionally be subjected to further processing steps such as cutting, coating, colouring, printing etc.
  • This process can be used to manufacture a moulded fibre product of any desired shape or size, including egg trays, egg cartons, food trays and food containers, plant pots, as well as specialized (industrial) packaging materials, such as inner supports for packaging for consumer goods such as lightbulbs and electronic equipment.
  • the latter may have highly complex shapes - designed using CAD-techniques- that are specifically adapted to the equipment or parts to be packaged, and that may also provide structural strength and/or impact resistance to the packaging.
  • moulded fibre packaging materials are replacing bulky polystyrene packaging.
  • FIG. 1 Usually, manufacturing processes for moulded fibre products are carried out at high throughput, for instance using a process as schematically shown in Figure 1.
  • This process uses a first set of suction moulds (2) placed on a first rotating carrier (1).
  • the carrier (1) rotates so as to immerse the moulds (2) in the pulp mass (3) - fed into reservoir (4) from pulper (6) through line (5) - whereupon the moulds (2) take up the part of the pulp, e.g. as a result of suction applied to the mould.
  • the pre-forms thus obtained are then transferred onto a second set of suction moulds (8) placed on a second rotating carrier (7), which transfers the pre-forms (9) onto a belt (10) which carries the pre-forms to drying oven (1 1).
  • egg trays may be produced in amounts of hunderds of units per minute or more.
  • Object of the invention is therefore to provide an improved method for the manufacture of moulded fibre products.
  • a further object is to provide moulded fibre products with improved properties.
  • the additives used according to the invention comprise at least one starch, starch derivative or starch degradation product, in particular an anionic starch or starch derivative, that has been modified with at least one polymeric component, in particular a kationic polymeric component.
  • the invention therefore relates to the use of a starch, starch derivative or starch degradation product that has been modified with at least one polymeric component, in the manufacture of moulded fibre products or articles.
  • the starch, starch derivative or starch degradation product is most preferably an anionic starch or starch derivative
  • the polymeric component is preferably a kationic polymer, more preferably a kationic polymer based on dialkylaminoalkyl(meth)acrylamide units, as further described below.
  • the anionic starch or starch derivative and the kationic polymer are preferably used in the form of an additive that is added to the pulp mass prior to the (vacuum) forming step thereof.
  • Such an additive is preferably in the form of an aqueous solution, obtained by heating the anionic starch or starch derivative and the kationic polymer together in water or an aqueous medium, again as further described below.
  • the invention therefore relates to a method for the manufacture of a moulded fibre article, said method comprising: a) providing a pulp mass; b) forming said pulp mass to provide a moulded fibre pre-form, in particular via a vacuum forming process; c) drying the moulded fibre pre-form thus obtained, d) optionally further processing the dried moulded fibre pre-form, such as by cutting, coating, colouring, printing; said method being characterised in that, prior to step b), an additive is added to the pulp mass, said additive comprising at least one starch, starch derivative or starch degradation product, modified with at least one polymeric component.
  • the invention also relates to moulded fibre products or articles obtained by said method, and/or to moulded fibre products or articles that contain an additive as described herein.
  • an additive as described herein.
  • containing is not only meant that such an additive is present (i.e. in a detectable amount) in the final moulded fibre product or article (as it usually will be), but also more generally that such an additive has been used in the manufacture of the moulded fibre product or article, i.e. that such an additive has been added to the pulp (mass) from which the moulded fibre product or article has been formed, e.g. by the aforementioned method.
  • the invention relates to the use of (an additive containing) at least one starch, starch derivative or starch degradation product, modified with at least one polymeric component, in the manufacture of moulded fibre products or articles.
  • the invention also relates to the use of at least one starch, starch derivative or starch degradation product, modified with at least one polymeric component, in the preparation of an additive for moulded fibre products or articles.
  • the starch or starch derivative can be a native starch such as potato, maize or cereal starch; a modified starch, such as starch degradation products including dextrins, chemically modified starches including substituted starches; and/or an anionic starch, including anonic starch esters or anionic starch ethers: and as such any starch, starch derivative, modified starch and/or anionic starch can be used. Examples of these and other suitable starches and starch derivatives are described in the non-prepublished German application DE 198 32 241.0.
  • Native starches in particular native anionic starches, and anionic starch derivatives are especially preferred.
  • suitable starches are Cerestar CbondTM (preferred) and Cerestar 0551 1.
  • the anionic starch or starch derivative is modified with a kationic polymer, for instance a kationic polymer based on monomers of (meth)acrylic acid and/or derivatives of (meth)acrylic acid.
  • a kationic polymer is essentially as described in the non- prepublished German application DE 198 32 241.0, i.e. a kationic homopolymer or co- polymer based on dialkylaminoalkyl(meth)acrylamide-units, more preferably such a homopolymer or co-polymer that contains at least 20% by weight of such polymerised dialkylaminoalkyl(meth)acrylamide-units.
  • these kationic polymers can contain at least 20% polymerised units of
  • -C 2 -alkylamido-C 2 -C 6 -alkylamines present in protonated and/or quaternated form.
  • These include protonated or quaternated, ⁇ , ⁇ -unsaturated, N- substituted carboxylic acids amids, such as dimethylaminoethyl-acrylamide or- metacrylamide, dimethylaminopropyl-acrylamide or -methacrylamidee, or N (N',N', 2',2"tetramethylaminoprolyl)-acrylamide or methacrylamide.
  • the kationic polymers can further contain all other monomeric units mentioned in the non-prepublished German application DE 198 32 241.0, such as , ⁇ -unsaturated monomers, ethylenically unsaturated monomers, etc..
  • monomeric units mentioned in the non-prepublished German application DE 198 32 241.0 such as , ⁇ -unsaturated monomers, ethylenically unsaturated monomers, etc..
  • modified starches used as additives in the invention are also obtained essentially as described in the non-prepublished German application DE 198 32 241.0. Generally, this will involve converting the starch or starch derivative with the polymer in aqueous solution at a temperature of 70 - 130 °C, preferably 90 - 100 °C, optionally under elevated pressure.
  • an aqueous solution of the starch (0.5 - 20 wt.% , preferably 2.0 - 10 wt.%) can be mixed -batch-wise or continuously- with an aqueous solution of the kationic polymer ( 0.1 - 2.0 wt.%, preferably 0.1 - 0.5 wt.%) in a ratio of 4: 1 to 25: 1 , preferably 10: 1 to 25: 1 most preferably 14: 1 to 20: 1 , whereupon the mixture is heated, for instance using a Jet-cooker.
  • an aqueous solution/suspension of 1 - 10 wt.% , preferably 2.5 - 5 wt.% starch can be mixed in a Jet Cooker with an aqueous solution/suspension of 1 - 5 wt. %, preferably 2.5 - 5 wt. % polyacrylamide-component, to form a final solution/suspension, which can be added per se to the pulp mass prior to the mould forming step.
  • additives can then be added, such as those described in the non- prepublished German application DE 198 32 241, in the amounts indicated therein.
  • the modified starches and starch derivatives are preferably used as such.
  • the additive is added to or mixed with the pulp mass prior to the vaccum forming step, for instance by mixing it with the feed that -in the illustrative process shown in Figure 1- is fed to the vacuum forming step through line (5); or by adding it to reservoir (4).
  • the additives will usually be added to the pulp mass in an amount of 0.1 - 5 %, preferably 0.5 - 2.5 % on a dry weight basis.
  • the pulp mass is prepared in the pulper (6) with a consistency of about 5,0 to 5,5 %. From the pulper, the pulp is then mixed with water to a consistency of about 3,5 to 4,5 %, to provide the so-called “thick pulp ' " ("dikstof). Prior to use in the forming machine, this "thick pulp” is then usually further diluted -i.e. in a suitable vessel- with water to provide the so-called “thin pulp” ("dunstof) with a consistency of about 1,0 to 1 ,2 %, which is used in the vacuum forming step(s).
  • the additive may be added to the pulp (mass) at any stage, i.e. to the pulper (6), to line (5), to reservoir (4); and/or to the starting pulp, to the thick pulp or to the thin pulp; or any suitable combination thereof.
  • the dry solids content on the forming machine can be (further) increased to 36 - 36,5 %.
  • the amount of energy required for the forming machine (expressed as units of natural gas used by the forming machine per unit of time) can also be reduced, as less water needs to be evaporated from the pulp mass/pre-form.
  • the runnabilily of the forming machine can be (further) optimized, enabling the throughput of the forming machine to be (further) increased. Also, this may allow a (further) reduction of the production weight (e.g. the weight of each unit produced), while still retaining the desired quality and characteristics of the final product obtained; and/or a (further) reduction of the amount of expended energy, starting materials and/or (other) additives used.
  • the pulp mass is then formed in a manner known per se, and the pre-forms thus obtained are dried, usually in an oven at elevated temperatures of about 100 - 300 °C, usually about 150 - 250 °C.
  • the additives of the invention will allow the use of lower(ed) oven temperatures, compared to conventional moulded fibre processes, which reduces the energy requirements of the process.
  • the moulded fibre articles thus obtained may then be ready for use (for instance in the case of egg trays) and/or may optionally be processed further in a manner known per se, such as cutting, coating, coloring, printing etc..
  • the moulded fibre articles or products thus obtained form a further aspect of the invention.
  • the additives of the invention can be used with advantages in all moulded fibre products, as well as in all processes for the manufacture thereof.
  • the additives can be used in high throughput - preferably - vacuum forming processes as described above, for instance using a "two rotor” machine as shown in Figure 1, or a "three rotor” machine; as well as in other mould or die forming processes for moulded fibre, in particular pressure forming processes.
  • such processes can be used for the manufacture of packaging materials, including egg trays, egg cartons, food trays, food containers, plant pots, as well as the specialized packaging materials (inner supports) described above.
  • the use of the additives of the invention may provide several advantages, relating both to the efficiency of the manufacturing process as well as the properties of the moulded fibre products obtained. These advantages may be obtained alone, but are usually obtained in combination, and inter alia comprise:
  • the mould forming process can be run at higher throughput.
  • the drying oven can be run at lower(ed) temperatures;
  • Example 1 Manufacture of egg trays. Egg trays were manufactured from a conventional secondary fibre pulp mass in a two rotor vacuum forming machine. The forming process was operated at conditions known per se for the industrial/commercial high throughput manufacture of egg trays.
  • PRAESTABONDTM system PK 880 - prepared as an aqueous solution/suspension according to the manufacturers instructions - was continously mixed with the pulp mass fed to the forming machine, in an amount corresponding to 2% on a dry weight basis.
  • the trays were dried in an oven at 240 °C and tested for bending strength (both under high and low humidity conditions), stiffness, as well as visual appearance.
  • the egg trays manufactured using the PRAESTABONDTM system PK 880 showed improved characteristics, compared to commercial egg trays made from the same pulp on the same forming machine at the same operating conditions.
  • PRAESTABONDTM system and “PRAESTABONDTM system PK 880” are trade names proprietary to Stockhausen GmbH.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un article moulé à base de fibres. Ce procédé consiste a) à produire une masse de pâte à papier, b) à former cette masse de pâte à papier afin de produire une préforme moulée à base de fibres, notamment par l'intermédiaire d'un processus de formage sous vide, c) à sécher la préforme moulée ainsi obtenue, d) le cas échéant, à traiter ultérieurement la préforme moulée et séchée, par découpe, couchage, coloration ou impression. Le procédé de l'invention est caractérisé en ce qu'avant l'étape b), un additif est ajouté à la masse de pâte à papier, cet additif comprenant au moins un amidon, un dérivé d'amidon ou un produit de décomposition d'amidon, transformé au moyen d'au moins un composant polymère. L'invention concerne également des produits ou des articles moulés à base de fibres, obtenus au moyen de ce procédé.
PCT/NL2000/000788 1999-11-01 2000-11-01 Produits moules a base de fibres comprenant de l'amidon transforme et procede de fabrication correspondant WO2001032987A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU17393/01A AU1739301A (en) 1999-11-01 2000-11-01 Moulded fibre products comprising modified starch and process for producing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99203594.9 1999-11-01
EP99203594 1999-11-01

Publications (1)

Publication Number Publication Date
WO2001032987A1 true WO2001032987A1 (fr) 2001-05-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002088468A2 (fr) * 2001-05-02 2002-11-07 Stockhausen Gmbh & Co. Kg Procede pour realiser des corps moules fibreux
WO2006134503A1 (fr) * 2005-06-14 2006-12-21 Brødrene Hartmann A/S Produit d'emballage tridimensionnel
WO2018190701A1 (fr) * 2017-04-12 2018-10-18 Huhtamaki Molded Fiber Technology B.V. Procédé de fabrication d'une unité d'emballage ou de maintien à partir d'une fraction de papier recyclé, et unité de ce type
WO2020070255A1 (fr) * 2018-10-03 2020-04-09 Billerudkorsnäs Ab Processus de fabrication d'articles tridimensionnels moulés à base de fibres et articles pouvant être obtenus par ledit processus
US20210114789A1 (en) * 2018-03-29 2021-04-22 Huhtamaki Molded Fiber Technology B.V. Biodegradable and Compostable Food Packaging Unit from a Moulded Pulp Material with a Cellulose-Base Laminate Layer, and Method for Manufacturing Such Food Packaging Unit

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968004A (en) * 1973-11-21 1976-07-06 Pittsburgh Corning Corporation Process for making a shaped fibrous article by a vacuum forming process and the shaped fibrous article made thereby
EP0283195A1 (fr) * 1987-03-13 1988-09-21 The Wiggins Teape Group Limited Structures plastiques renforçées par des fibres
US5035930A (en) * 1988-12-30 1991-07-30 National Starch And Chemical Investment Holding Corporation Biodegradable shaped products and the method of preparation thereof
WO1993025755A1 (fr) * 1992-06-10 1993-12-23 Brdr. Hartmann A/S Procede et installation pour la production en continu d'objets a partir de materiau en pate
US5294299A (en) * 1988-11-07 1994-03-15 Manfred Zeuner Paper, cardboard or paperboard-like material and a process for its production
EP0824161A2 (fr) * 1996-08-12 1998-02-18 Südzucker Aktiengesellschaft Mannheim/Ochsenfurt L'amidon et des dérivés d'amidon pour l'industrie papetière
US5759249A (en) * 1997-02-04 1998-06-02 Cytec Technology Corp. Sizing emulsion
DE19713755A1 (de) * 1997-04-04 1998-10-08 Basf Ag Verfahren zur Herstellung von Papier, Pappe und Karton mit hoher Trockenfestigkeit
DE19719062A1 (de) * 1997-05-06 1998-11-12 Basf Ag Verfahren zur Herstellung von Aggregaten aus Stärke und kationischen Polymeren und ihre Verwendung
US5900119A (en) * 1996-10-09 1999-05-04 E-Tech Products, Inc. Method of forming improved loose fill packing material from recycled paper

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968004A (en) * 1973-11-21 1976-07-06 Pittsburgh Corning Corporation Process for making a shaped fibrous article by a vacuum forming process and the shaped fibrous article made thereby
EP0283195A1 (fr) * 1987-03-13 1988-09-21 The Wiggins Teape Group Limited Structures plastiques renforçées par des fibres
US5294299A (en) * 1988-11-07 1994-03-15 Manfred Zeuner Paper, cardboard or paperboard-like material and a process for its production
US5035930A (en) * 1988-12-30 1991-07-30 National Starch And Chemical Investment Holding Corporation Biodegradable shaped products and the method of preparation thereof
WO1993025755A1 (fr) * 1992-06-10 1993-12-23 Brdr. Hartmann A/S Procede et installation pour la production en continu d'objets a partir de materiau en pate
EP0824161A2 (fr) * 1996-08-12 1998-02-18 Südzucker Aktiengesellschaft Mannheim/Ochsenfurt L'amidon et des dérivés d'amidon pour l'industrie papetière
US5900119A (en) * 1996-10-09 1999-05-04 E-Tech Products, Inc. Method of forming improved loose fill packing material from recycled paper
US5759249A (en) * 1997-02-04 1998-06-02 Cytec Technology Corp. Sizing emulsion
DE19713755A1 (de) * 1997-04-04 1998-10-08 Basf Ag Verfahren zur Herstellung von Papier, Pappe und Karton mit hoher Trockenfestigkeit
DE19719062A1 (de) * 1997-05-06 1998-11-12 Basf Ag Verfahren zur Herstellung von Aggregaten aus Stärke und kationischen Polymeren und ihre Verwendung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002088468A2 (fr) * 2001-05-02 2002-11-07 Stockhausen Gmbh & Co. Kg Procede pour realiser des corps moules fibreux
WO2002088468A3 (fr) * 2001-05-02 2003-10-02 Stockhausen Chem Fab Gmbh Procede pour realiser des corps moules fibreux
WO2006134503A1 (fr) * 2005-06-14 2006-12-21 Brødrene Hartmann A/S Produit d'emballage tridimensionnel
WO2018190701A1 (fr) * 2017-04-12 2018-10-18 Huhtamaki Molded Fiber Technology B.V. Procédé de fabrication d'une unité d'emballage ou de maintien à partir d'une fraction de papier recyclé, et unité de ce type
NL2018699B1 (en) * 2017-04-12 2018-10-19 Huhtamaki Molded Fiber Tech Bv Method for manufacturing a packaging or holding unit from a recycled paper fraction, and such unit
US20210114789A1 (en) * 2018-03-29 2021-04-22 Huhtamaki Molded Fiber Technology B.V. Biodegradable and Compostable Food Packaging Unit from a Moulded Pulp Material with a Cellulose-Base Laminate Layer, and Method for Manufacturing Such Food Packaging Unit
WO2020070255A1 (fr) * 2018-10-03 2020-04-09 Billerudkorsnäs Ab Processus de fabrication d'articles tridimensionnels moulés à base de fibres et articles pouvant être obtenus par ledit processus

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