EP3301221A1 - Papier d'emballage et son procédé de fabrication - Google Patents

Papier d'emballage et son procédé de fabrication Download PDF

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Publication number
EP3301221A1
EP3301221A1 EP17193964.8A EP17193964A EP3301221A1 EP 3301221 A1 EP3301221 A1 EP 3301221A1 EP 17193964 A EP17193964 A EP 17193964A EP 3301221 A1 EP3301221 A1 EP 3301221A1
Authority
EP
European Patent Office
Prior art keywords
packaging paper
starch
less
paper
gurley
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP17193964.8A
Other languages
German (de)
English (en)
Inventor
Ralf Lemitz
Michael Steuernagel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Drewsen Spezialpapiere & Co KG GmbH
Original Assignee
Drewsen Spezialpapiere & Co KG GmbH
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 Drewsen Spezialpapiere & Co KG GmbH filed Critical Drewsen Spezialpapiere & Co KG GmbH
Publication of EP3301221A1 publication Critical patent/EP3301221A1/fr
Pending legal-status Critical Current

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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/02—Metal coatings
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/02—Metal coatings
    • D21H19/06—Metal coatings applied as liquid or powder
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper

Definitions

  • the present invention relates to a packaging paper with increased barrier properties against oily and greasy materials and a method for its preparation.
  • Packaging papers having increased barrier properties against oily and greasy materials are known in the art. Since papers are inherently more porous, water, grease and oil impermeable, they must be provided with special measures for these barrier properties.
  • the required increased barrier property in the prior art is achieved either by extremely high milling of the fibers; grinding degrees of 90 ° SR (Schopper-Riegler) and more are chosen. This measure proves, however, because of the required high grinding energy, as expensive and does not achieve sufficiently high greaseproof. Or the barrier property is achieved by applying a barrier coating using fluorocarbons. However, fluorocarbons are considered harmful to the environment as they have a long life and can hardly be degraded biologically.
  • a packaging paper according to the invention is produced from a base paper having a basis weight of between 15 g / m 2 and 500 g / m 2 and a porosity greater than 150 Gurley-s according to ISO 5636/5: 2013. This has a pulp mix of long fibers and short fibers, an ash content according to DIN 54370: 2007 of less than 15% and an adjuvant.
  • the paper has on at least one surface a barrier layer, which comprises at least one modified starch and a platelet-shaped pigment having an aspect ratio of greater than 1:20, preferably greater than 1:40, in particular 1:60 or 1:80 and a surface water repellent agent.
  • the proportion of the platelet-shaped pigment in the line formulation is between 5% and 50%.
  • D 1 is the thickness in the x-direction
  • D 2 the thickness in the x-direction
  • d the thickness in the z-direction of the platelet-shaped pigment.
  • a packaging paper according to the invention can be selected from a wide range of raw papers.
  • base paper with a basis weight between 15 g / m 2 and 500 g / m 2 can be used.
  • the base paper plays a significant role, for which applications the packaging paper produced according to the invention is determined.
  • a sufficiently strong, dense and less porous base paper is required. Its porosity should be greater than 150 Gurley-s according to ISO 5636/5: 2013.
  • a pulp mix is used which on the one hand has a certain proportion of short fibers for closing the pores for the tightness;
  • Zeitstofffier of eucalyptus, beech or birch or combinations thereof are suitable.
  • a certain proportion of long fibers is used; especially Zeitstofffasern pine and spruce are suitable for this.
  • the base paper has an ash content according to DIN 54370: 2007 of less than 15%, in order to achieve a certain degree of whiteness and to contribute to an appropriate balance of strength and density for the application.
  • a packaging paper according to the invention has a barrier layer ("bar") on at least one surface.
  • the application weight per surface is between 0.1 and 5 g / m 2 , preferably between 0.5 and 5 g / m 2 .
  • This layer is formed from a dispersion of modified starch and a platelet-shaped pigment pigments.
  • a surface-hydrophobing agent is added to the coating liquor (coating agent).
  • the pigment is added to the coating liquor in order to seal the pores present on the paper surface due to its geometrical, platelet-shaped form and to prevent penetration, in particular too low binder migration, of the remaining liquor constituents into the paper.
  • the modified thickness of the coating liquor is in the form of nano-starch particles, which are applied to the paper web during coating and combine with the pigments during drying. This forms a stable, pore-occlusive and very dense film on the at least one paper surface. This film, in conjunction with the special raw paper, creates an extremely effective barrier against various liquids, especially oils, fats, solvents and possibly water.
  • papers according to the invention are suitable for a very wide range of applications, wherever a barrier action against natural or synthetic fats, oils and solvents or optionally water or mixtures of these substances is required.
  • Examples are vegetable fats, chocolate fats, animal fats such as chicken fats, but also greases, etc.
  • it can be selected from low to very high density.
  • Another advantage is that this excellent barrier effect against the substances mentioned is achieved using natural and biodegradable and recyclable auxiliaries, in particular without the use of fluorocarbons and / or synthetic binders.
  • the base paper has wet strength agents to ensure a certain wet strength during manufacture.
  • Wet strength agents need to develop a firmer (preferably covalent) bond to the fibers that can not be displaced by water molecules.
  • wet strength agents usually polymers or polyfunctional compounds having reactive groups are used which react only under the drying conditions with the OH groups of the pulp fibers and thereby bridging several fibers.
  • the modified starch is a modified corn starch, in particular it is a film-forming agent based on nanoscale starch, which as a commodity in particular has a moisture content of between 2 and 6%, a density of between 0.5 and 0.7 kg / l Particle size between 50 and 150 nm, a Brookfield viscosity (preferably according to DIN EN ISO 2555-2000-01) at 25% solids and room temperature between 175 and 350 mPas and does not need to be cooked for technical use.
  • a modified corn starch in particular it is a film-forming agent based on nanoscale starch, which as a commodity in particular has a moisture content of between 2 and 6%, a density of between 0.5 and 0.7 kg / l Particle size between 50 and 150 nm, a Brookfield viscosity (preferably according to DIN EN ISO 2555-2000-01) at 25% solids and room temperature between 175 and 350 mPas and does not need to be cooked for technical use.
  • the modified starch is also in cold water, i. in water in a temperature range between 10 ° C and 55 ° C, in particular below the gelatinization, suspendable.
  • the hydrophobing agent is an anionic surface sizing agent.
  • anionic polymers find use, e.g. modified copolymers of styrene and maleic anhydride, copolymers of methacrylate and acrylate monomers, copolymers of styrene with acrylate / methacrylate monomers, polyurethane dispersions or copolymers and graft polymers of acrylonitrile.
  • the pulp mix has a proportion between 0 to 70% long fibers and 30 to 100% short fibers, preferably a proportion between 10 to 60% long fibers and 40 to 90% short fibers and in particular a proportion of 50% long fibers and 50% short fibers on.
  • the long fiber pulp is a spruce and / or pine sulphate pulp and the short fiber pulp is a eucalyptus, beech and / or birch sulphate pulp.
  • the total ash content is less than 15%, preferably less than 10%, in particular less than 7% and greater than 0%.
  • the weight per unit area of the base paper is preferably between 18 g / m 2 and 400 g / m 2 , in particular between 20 g / m 2 and 300 g / m 2 , preferably between 22 g / m 2 and 250 g / m 2 preferably between 25 g / m 2 and 160 g / m 2 , and in particular it is about 40 g / m 2 .
  • the Basis weight of the selected base paper depends mainly on the required use.
  • the at least one adjuvant is selected from a group comprising conditioning agents for pulp, cationic resin dispersion, kaolin slurries, polyamide wet strength resins, polyaluminum chloride, biopolymer and carboxymethylcellulose (CMC) with anionic charges.
  • the substances mentioned contribute to charge regulation and to a further increase in the strength properties.
  • the porosity of the paper of the invention is preferably greater than 180 gurley-s and less than 25,000 gurley-s, more preferably greater than 200 gurley-s and less than 10,000 gurley-s, and more preferably about 5,000 gurley-s ,
  • the barrier layer according to the invention This means that also the tightness against gases, e.g. Air, is significantly increased by the barrier layer according to the invention.
  • the barrier layer generally contributes significantly more to the impermeability of the paper according to the invention than the paper arranged underneath; This applies both to the impermeability to oils, greases, etc. and to the impermeability to gases.
  • the weight ratio between the modified starch and the platelet-shaped pigments having an aspect ratio> 20 is more than 50% starch and less than 50% pigments, more preferably more than 65% starch and less than 35% pigments, and especially at 85% strength and 15% platelet-shaped pigments.
  • the weight fraction of the modified starch is between 30% and 95%, preferably between 55% and 80%, particularly preferably between 60% and 70% and in particular at 60% or 65% and the proportion by weight of the platelet-shaped pigment with an aspect ratio> 20 between 70% and 5%, preferably between 45% and 20%, more preferably between 40% and 30% and in particular at 40% or 35%.
  • the weight ratio of the mixture of modified starch and platelet-shaped pigments - and thus among other things, the resulting tightness of the paper - mainly depends on the required use.
  • the barrier layer has an oil and grease impermeability, according to DIN standard 53116 - 2003, of at least stage 5, particularly preferably of at least stage 4 and in particular of stage 3.
  • the barrier layer has an oil and grease seal according to DIN EN ISO 16532-2: 2007 of at least 3 KIT, more preferably of at least 6 KIT and in particular of 12 KIT.
  • the barrier layer has oil and grease tightness according to TAPPI standard of 60 s to 1800 s.
  • the barrier layer has an oil and grease seal in accordance with the so-called "hot oil test” - which was explained above - from 1 min to 20 min.
  • the barrier layer has an oil and greaseproofness according to the so-called "Nutella test” of 1 hour to 24 hours.
  • a particular advantage of the paper according to the invention is that it achieves excellent results in a large number of these tests, even if - as the width of the tests carried out - the tightness against a number of quite heterogeneous fats, oils, solvents and / or possibly water tested becomes.
  • papers according to the invention are suitable for a very wide range of applications, wherever a barrier action against natural or synthetic fats, oils and solvents or optionally water or mixtures of these substances is required.
  • a packaging paper according to the invention can be selected from a wide range of raw papers.
  • base paper with a basis weight between 15 g / m 2 and 500 g / m 2 can be used.
  • the base paper plays a significant role, for which applications the packaging paper produced according to the invention is determined.
  • a sufficiently strong, dense and less porous base paper is required.
  • the grinding of the raw paper plays a role, ie it is a raw paper with the highest possible specific grinding energy used.
  • a packaging paper according to the invention has a barrier layer ("bar") on at least one surface.
  • a coating agent is provided, which is formed from a dispersion comprising: modified starch, platelet-shaped pigment, a surface-water repellent and water.
  • the said line is applied to the raw paper by means of a coating unit, a printing unit, a coating machine or by spraying.
  • the method according to the invention can therefore be carried out on a large number of different types of paper machines.
  • the platelet-shaped pigment closes - due to its geometric, platelet-shaped form - the pores present on the paper surface.
  • the modified thickness of the coating liquor is in the form of tiny nano-starch particles which combine with the platelet-shaped pigment during drying. This forms a stable, pore-occlusive and very dense film on the at least one paper surface. This film, especially in conjunction with the dense base paper, creates an effective barrier against various liquids, especially oils, fats, solvents and possibly water.
  • the drying and the smoothing of the coated paper also play a role in the production process.
  • the base paper used in the production has wet strength agent to ensure a certain wet strength during production.
  • Wet strength agents need to develop a firmer (preferably covalent) bond to the fibers that can not be displaced by water molecules.
  • a wet strength agent are usually Polymers or polyfunctional compounds with reactive groups used that react only under the drying conditions with the OH groups of the pulp fibers and thereby bridge several fibers together.
  • the solids content of DIN EN 827: 2006 of the coating composition is between 10% and 35%, preferably between 20% and 30%, and this is in particular about 28%.
  • the solids content according to DIN EN 827: 2006 of the coating composition is between 20% and 60%, preferably between 30% and 50%, particularly preferably between 35% and 45%.
  • the temperature of the size liquor is 30 to 60 ° C.
  • the drying of the coated paper should be done as quickly as possible. This is preferably done by means of contactless and then touching drying, for example by means of an air-turn dryer and / or infrared radiator and then by means of a dry cylinder.
  • the smoothing should be carried out under the highest possible pressure.
  • pressures with a line force of 30 to 300 kN / m, preferably from 80 to 120 kN / m used.
  • the best possible running behavior of the paper on the paper machine is desirable, which can be achieved in particular by uniform coating application and by a sufficient strength of the paper.
  • the platelet-shaped pigment is added to the coating liquor due to its geometric, platelet-shaped shape to close the pores present on the paper surface and to prevent penetration, in particular too far penetration, of the remaining liquor constituents in the paper.
  • the modified thickness of the coating liquor is in the form of tiny nano-starch particles, which are applied to the paper web during coating and combine with the pigments during the drying pass. This forms a stable, pore-occlusive and very dense film on the at least one paper surface. This film, in conjunction with the dense base paper, creates an extremely effective barrier against various liquids, especially against oils, fats, solvents and possibly water.
  • the coat application on the upper side and / or on the underside of the base paper is in each case between 0.1 and 7.0 g / m 2 , preferably between 0.5 and 5.0 g / m 2 , particularly preferably between 1, 0 to 4.0 g / m 2 and especially between 1.5 and 3.0 g / m 2 .
  • the thickness of the coating application depends considerably on the intended use of the packaging paper according to the invention. Thus, for a very high demanded barrier strength, the line becomes special be chosen thick.
  • the thickness of the coating application is for example between 0.1 and 7 microns. If necessary, the line is also applied on both sides.
  • a packaging paper according to the invention has in principle a wide range of applications.
  • these packaging papers can be used as barrier papers against oily and greasy materials, e.g. Hot or cold food such as meat, sausage, fish, cheese, snacks such as French fries or pizzas, but also East and vegetables, etc. in the store or directly after production contemplatbacken or baked.
  • these papers can be produced in a variety of forms, for example as simple paper sheets, foldable cartons or as thermoformable papers. In general, these papers are suitable for a wide range of applications, wherever a barrier effect against oils, solvent-oil mixtures, vegetable fats, chicken fats, chocolate fats, etc. is required.
  • these papers can also be used for machine parts such as screws, gaskets, etc., which are either stored or shipped in oils, solvents, etc., or which are - e.g. during shipping - against fats, oils, solvents, and possibly water etc. are to be protected.

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  • Paper (AREA)
EP17193964.8A 2016-09-30 2017-09-29 Papier d'emballage et son procédé de fabrication Pending EP3301221A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016118587.6A DE102016118587A1 (de) 2016-09-30 2016-09-30 Verpackungspapier und Verfahren für dessen Herstellung

Publications (1)

Publication Number Publication Date
EP3301221A1 true EP3301221A1 (fr) 2018-04-04

Family

ID=60117480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17193964.8A Pending EP3301221A1 (fr) 2016-09-30 2017-09-29 Papier d'emballage et son procédé de fabrication

Country Status (2)

Country Link
EP (1) EP3301221A1 (fr)
DE (2) DE102016118587A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3342929B1 (fr) 2016-12-30 2018-12-12 Mitsubishi HiTec Paper Europe GmbH Papier barrière
EP3974580A1 (fr) * 2020-09-28 2022-03-30 BillerudKorsnäs AB Produit en papier pour l'emballage tubulaire

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60130839T2 (de) * 2000-07-07 2008-07-17 National Starch And Chemical Investment Holding Corp., Wilmington Beschichtung für Papierprodukte
EP1246966B1 (fr) * 1999-07-09 2009-04-15 Ciba Holding Inc. Composition de collage de surface
WO2010141581A1 (fr) * 2009-06-03 2010-12-09 Hercules Incorporated Pigments modifies de resine cationique resistante a l'etat humide dans des applications de revetement aqueux en latex
EP2370533A1 (fr) * 2008-12-30 2011-10-05 Sheffield Hallam University Matière barrière à base de biopolymère et son procédé de fabrication
WO2013182757A1 (fr) * 2012-06-08 2013-12-12 Upm-Kymmene Corporation Procédé et système de fabrication d'un matériau d'emballage, matériau d'emballage et emballage
WO2014006269A1 (fr) * 2012-07-05 2014-01-09 Upm-Kymmene Corporation Emballage pour denrées alimentaires
EP2777934A1 (fr) * 2011-11-10 2014-09-17 Nippon Paper Industries Co., Ltd Matériau d'emballage à papier barrière

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1246966B1 (fr) * 1999-07-09 2009-04-15 Ciba Holding Inc. Composition de collage de surface
DE60130839T2 (de) * 2000-07-07 2008-07-17 National Starch And Chemical Investment Holding Corp., Wilmington Beschichtung für Papierprodukte
EP2370533A1 (fr) * 2008-12-30 2011-10-05 Sheffield Hallam University Matière barrière à base de biopolymère et son procédé de fabrication
WO2010141581A1 (fr) * 2009-06-03 2010-12-09 Hercules Incorporated Pigments modifies de resine cationique resistante a l'etat humide dans des applications de revetement aqueux en latex
EP2777934A1 (fr) * 2011-11-10 2014-09-17 Nippon Paper Industries Co., Ltd Matériau d'emballage à papier barrière
WO2013182757A1 (fr) * 2012-06-08 2013-12-12 Upm-Kymmene Corporation Procédé et système de fabrication d'un matériau d'emballage, matériau d'emballage et emballage
WO2014006269A1 (fr) * 2012-07-05 2014-01-09 Upm-Kymmene Corporation Emballage pour denrées alimentaires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3342929B1 (fr) 2016-12-30 2018-12-12 Mitsubishi HiTec Paper Europe GmbH Papier barrière
EP3974580A1 (fr) * 2020-09-28 2022-03-30 BillerudKorsnäs AB Produit en papier pour l'emballage tubulaire
WO2022064048A1 (fr) * 2020-09-28 2022-03-31 Billerudkorsnäs Ab Produit en papier pour emballage tubulaire

Also Published As

Publication number Publication date
DE102016118587A1 (de) 2018-04-05
DE202017006947U1 (de) 2018-12-14

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