WO1999018290A1 - Procede pour impermeabiliser aux graisses des substrats cellulosiques - Google Patents
Procede pour impermeabiliser aux graisses des substrats cellulosiques Download PDFInfo
- Publication number
- WO1999018290A1 WO1999018290A1 PCT/FR1998/002105 FR9802105W WO9918290A1 WO 1999018290 A1 WO1999018290 A1 WO 1999018290A1 FR 9802105 W FR9802105 W FR 9802105W WO 9918290 A1 WO9918290 A1 WO 9918290A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer
- water
- soluble film
- latex
- forming polymer
- Prior art date
Links
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
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- 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
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
-
- 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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- 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
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- 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
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
- D21H19/824—Paper comprising more than one coating superposed two superposed coatings, both being non-pigmented
Definitions
- the subject of the present invention is a process for waterproofing cellulosic substrates of the paper or cardboard type and to the substrates thus treated.
- It relates more particularly to the field of packaging intended in particular for food packaging.
- the present invention relates specifically to the development of a new coating for paper and / or cardboard to give them impermeability to grease.
- the problem posed and solved according to the present invention relates to the development of a film which is impermeable to grease and which, moreover, is completely compatible with mechanical operations of the folding type for example, conventionally imposed on the packaging.
- the film obtained according to the present invention must be approved for food contact, of low cost and not generate toxic products during its recycling.
- the Applicant has demonstrated that a film composed of at least one polymer or copolymer derived from a synthetic latex and from a water-soluble film-forming polymer satisfied all of the above-mentioned requirements.
- the subject of the present invention is a method for waterproofing cellulosic substrates of the paper or cardboard type, with grease, characterized in that it comprises the application to the surface of said substrate to be waterproofed of an aqueous coating medium comprising at least one polymer or copolymer derived from a synthetic latex and a water-soluble film-forming polymer, and its drying to obtain a film.
- paper or cardboard type cellulosic material means papers or cardboards of different grammage as well as similar nonwoven fiber materials or sheets.
- the polymers or copolymers derived from a synthetic latex are in fact used in the form of a latex in the coating medium.
- the latexes which are particularly suitable for the present invention have a glass transition temperature Tg of less than 40 ° C and preferably less than 30 ° C. This specificity favors the flexibility of the grease-proofing film obtained according to the invention.
- latexes are obtained by (co) emulsion polymerization of unsaturated monomers, chosen from the group consisting of:
- styrene and / or its derivatives in particular derivatives such as alphamethylstyrene or vinyltoluene;
- dienes such as butadiene and isoprene;
- ethylenic unsaturated mono- and di-carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid and mono- and di-alkyl esters, mono acids - or dicarboxyls of the type mentioned with the alkanols preferably having 1 to 8 carbon atoms and their N-substituted derivatives,
- amides of unsaturated carboxylic acids such as acrylamide, methacrylamide, N-methylolacrylamide or methacrylamide, N-alkylacrylamides; (5) vinyl nitriles including more particularly those having 3 to 12 carbon atoms, such as in particular acrylonitrile and methacrylonitrile;
- the latexes used are obtained by (co) polymerization in emulsion of unsaturated monomers chosen in majority (more than 50%) or totally from the group consisting (7) of vinyl esters or C ⁇ alkyl -C 8 carboxylic acids such as vinyl acetate, vinyl versatate, vinyl propionate, maleate, or versatate acrylate, C 1 to Cg, and mixtures thereof and their derivatives by substitution.
- unsaturated monomers chosen in majority (more than 50%) or totally from the group consisting (7) of vinyl esters or C ⁇ alkyl -C 8 carboxylic acids such as vinyl acetate, vinyl versatate, vinyl propionate, maleate, or versatate acrylate, C 1 to Cg, and mixtures thereof and their derivatives by substitution.
- these monomers (7) are in the majority, the remaining monomers are chosen from monomers (1) to (6).
- the coating medium comprises a vinyl acetate homopolymer or a copolymer of vinyl acetate maleate, C 1 to C 8 alkyl acrylate or acrylate.
- water-soluble film-forming polymer it is preferably chosen from carbohydrates and their derivatives and polyalcohols.
- polysaccharides such as starch, cellulose, xanthan gum and guars and their derivatives and ethers carbohydrates such as methyl-, ethyl-, carboxymethyl-, hydroxyethyl- and cellulose hydroxypropyl ethers.
- polyalcohols these are more particularly partially or fully hydrolyzed polyvinyl acetates.
- it is a polyvinyl alcohol.
- the aqueous coating medium defined according to the invention can be applied to the surface of the cellulosic substrate to be waterproofed in the form of either a single layer of aqueous coating comprising a mixture of at least one polymer or copolymer derived from a synthetic latex and of a water-soluble film-forming polymer or at least two distinct and consecutive aqueous coating layers, the first layer, affixed to the surface of the substrate, comprising at least the polymer or copolymer derived from a synthetic latex and the second layer, superimposed on the first layer, comprising at least the water-soluble film-forming polymer.
- the coating medium comprises two consecutive layers, the first based on the polymer or copolymer derived from a latex and the second based on the water-soluble film-forming polymer.
- drying operations carried out during the process of the invention they are carried out according to conventional techniques of the paper industry.
- the amounts of polymer or copolymer derived from a synthetic latex and of water-soluble film-forming polymer are adjusted so as to obtain, at the level of the final film, a basis weight of polymer or copolymer derived from a synthetic latex of between approximately 0.5 and 25 g / m 2 and a grammage of water-soluble film-forming polymer of between approximately 0.5 and 5 g / m 2 .
- the quantity of water-soluble film-forming polymer, within the mixture is adjusted so as to obtain in the dry film, a grammage of water-soluble film-forming polymer of between 0.5 and 5 g / m 2 .
- the film obtained according to the present invention may contain additional additives, conventionally used in coating or paper coating media.
- filler to the coating medium.
- fillers such as for example calcium carbonates, silicoaluminates, titanium oxide and talc.
- the content of these fillers is generally between 0 and 50 parts by weight relative to the content of polymers expressed as dry matter in the coating medium.
- insolubilizing agents As a representative of these agents, mention may be made particularly of urea formaldehyde resins, melamine formaldehyde, epoxy, glyoxal and zirconium salts.
- they are present in an amount of 0 to 10 parts by weight relative to the polymer content, expressed as dry matter of the coating medium.
- Another advantage of the process according to the invention consists in that the coating can be deposited by conventional coating devices for coating paper and therefore does not require any particular adaptation.
- the application and metering of the coating medium is carried out using conventional coating machines, of the type of coating machine with an air knife, blade, bar, or roller.
- the coating medium is aqueous-based and therefore free of organic solvents.
- the formation of the final film is obtained by drying said coating medium and at the same time, evaporating the water from the emulsion.
- the present invention also extends to any cellulosic substrate of paper or cardboard type impermeable to grease according to the claimed process.
- a polymer or copolymer derived from a synthetic latex and of a water-soluble film-forming polymer as defined according to the invention, for waterproofing cellulosic substrates of the paper or cardboard type to greases.
- the polymer or copolymer derived from a synthetic latex and the water-soluble film-forming polymer can be used, in the form of a mixture or simply be juxtaposed with one another as described above.
- the coating media are dried for five minutes in an oven at 105 ° C.
- the concentration in the coating medium is adjusted according to the desired removal.
- EXAMPLE 1 An aqueous coating medium based on a latex based on an acetate maleate polymer 80/20 (Rhodopas AM021® from the company Rhône-Poulenc) is deposited on the paper, at a rate of 10 g / m 2 expressed as dry matter.
- the paper is coated with a coating medium of the following composition:
- EXAMPLE 3 The paper is first coated with 14.5 g / m 2 of Rhodopas AM021®, dried, then coated with 3.5 g / m 2 of polyvinyl alcohol APV2.
- Rhodopas AM021 ® from Rhône-Poulenc, then dried, then coated with 2 to 3 g / m 2 of one of the following water-soluble polymers, identified above: n ° 4: APV2 n ° 5: APV1 n ° 6: APV3
- EXAMPLE 9 The paper is coated with 5 / m 2 of polyvinyl alcohol APV2.
- EXAMPLE 10 Measurement of the permeability to grease and the folding resistance of the coated papers according to Examples 1 to 9.
- the grease permeabilities of coated papers obtained according to Examples 1 to 9 are measured according to the TAPPI T 507cm-85 standard. The tests are carried out with colored oleic acid, the samples are placed in an oven, some for four hours, as specified in the standard, others for six hours, in order to better differentiate the results.
- the result is expressed as the average colored area on the blotter located under the paper to be tested. As these blotters often remain intact, it was noted the resistance to grease in "flat” by the measurement of the red index (carried out on Elrepho-Data Color) on the back of the tested papers.
- bi-coatings Compared to a coating based only on polyvinyl alcohol (example 9), bi-coatings have the advantage of having much better fold hold.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98946545A EP1023502A1 (fr) | 1997-10-03 | 1998-10-01 | Procede pour impermeabiliser aux graisses des substrats cellulosiques |
AU93554/98A AU9355498A (en) | 1997-10-03 | 1998-10-01 | Method for making cellulose substrates grease-proof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9712377A FR2769328B1 (fr) | 1997-10-03 | 1997-10-03 | Procede pour impermeabiliser aux graisses des substrats cellulosiques |
FR97/12377 | 1997-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999018290A1 true WO1999018290A1 (fr) | 1999-04-15 |
Family
ID=9511823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1998/002105 WO1999018290A1 (fr) | 1997-10-03 | 1998-10-01 | Procede pour impermeabiliser aux graisses des substrats cellulosiques |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1023502A1 (fr) |
AU (1) | AU9355498A (fr) |
FR (1) | FR2769328B1 (fr) |
WO (1) | WO1999018290A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008036315A2 (fr) * | 2006-09-20 | 2008-03-27 | Nanopaper, Llc | Formulations résistantes à la graisse |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1985698A (en) * | 1929-08-30 | 1934-12-25 | Gardner Richardson Co | Paper manufacture |
CH339118A (de) * | 1957-04-25 | 1959-06-15 | Schindler & Co Jacques | Verpackungsmaterial |
EP0085919A1 (fr) * | 1982-02-10 | 1983-08-17 | Ab Tetra Pak | Méthode de fabrication d'un matériau d'emballage ayant de bonnes propriétés d'étanchéité aux gaz |
US5587204A (en) * | 1995-03-22 | 1996-12-24 | International Paper Company | Recyclable paperboard composites |
EP0754801A2 (fr) * | 1995-07-17 | 1997-01-22 | Westvaco Corporation | Structure d'emballage en base de pâte à papier incluant un copolymère colloidal pour l'amélioration du "hold-out" |
DE29710761U1 (de) * | 1997-06-20 | 1997-08-28 | Knoeckel, Schmidt & Cie. Papierfabrik GmbH, 67466 Lambrecht | Lebensmittelverpackungsmaterial auf Pergaminbasis |
-
1997
- 1997-10-03 FR FR9712377A patent/FR2769328B1/fr not_active Expired - Fee Related
-
1998
- 1998-10-01 WO PCT/FR1998/002105 patent/WO1999018290A1/fr not_active Application Discontinuation
- 1998-10-01 AU AU93554/98A patent/AU9355498A/en not_active Abandoned
- 1998-10-01 EP EP98946545A patent/EP1023502A1/fr not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1985698A (en) * | 1929-08-30 | 1934-12-25 | Gardner Richardson Co | Paper manufacture |
CH339118A (de) * | 1957-04-25 | 1959-06-15 | Schindler & Co Jacques | Verpackungsmaterial |
EP0085919A1 (fr) * | 1982-02-10 | 1983-08-17 | Ab Tetra Pak | Méthode de fabrication d'un matériau d'emballage ayant de bonnes propriétés d'étanchéité aux gaz |
US5587204A (en) * | 1995-03-22 | 1996-12-24 | International Paper Company | Recyclable paperboard composites |
EP0754801A2 (fr) * | 1995-07-17 | 1997-01-22 | Westvaco Corporation | Structure d'emballage en base de pâte à papier incluant un copolymère colloidal pour l'amélioration du "hold-out" |
DE29710761U1 (de) * | 1997-06-20 | 1997-08-28 | Knoeckel, Schmidt & Cie. Papierfabrik GmbH, 67466 Lambrecht | Lebensmittelverpackungsmaterial auf Pergaminbasis |
Also Published As
Publication number | Publication date |
---|---|
EP1023502A1 (fr) | 2000-08-02 |
FR2769328A1 (fr) | 1999-04-09 |
FR2769328B1 (fr) | 1999-12-24 |
AU9355498A (en) | 1999-04-27 |
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