EP0261316B1 - Procédé de fabrication de papiers résistants au jaunissement en particulier en présence de l'action de la chaleur - Google Patents

Procédé de fabrication de papiers résistants au jaunissement en particulier en présence de l'action de la chaleur Download PDF

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Publication number
EP0261316B1
EP0261316B1 EP87108897A EP87108897A EP0261316B1 EP 0261316 B1 EP0261316 B1 EP 0261316B1 EP 87108897 A EP87108897 A EP 87108897A EP 87108897 A EP87108897 A EP 87108897A EP 0261316 B1 EP0261316 B1 EP 0261316B1
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EP
European Patent Office
Prior art keywords
cellulose
yellowing
coating
paper
heat
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.)
Expired - Lifetime
Application number
EP87108897A
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German (de)
English (en)
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EP0261316A1 (fr
Inventor
Bernd Dr.-Ing. Reinhardt
Ulrik Dipl.-Ing. Arneberg
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.)
Kammerer GmbH
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Kammerer GmbH
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Priority to AT87108897T priority Critical patent/ATE56768T1/de
Publication of EP0261316A1 publication Critical patent/EP0261316A1/fr
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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
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • 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
    • 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

Definitions

  • the invention relates to a process for the production of paper webs consisting of special pulps, fillers and chemical auxiliaries, which are additionally provided with a surface application which contains additives of strongly hygroscopic substances.
  • the yellowing of paper is usually accelerated in the laboratory using mostly high-energy UV radiation and / or temperature.
  • the usual treatment temperatures are between 70 and 130 ° C, with lower temperatures often being used with a defined relative humidity.
  • the duration of exposure to the test medium is between 4 and 168 hours ("Zellstoff undmaschine" (1976) 6, page 166-170).
  • N. Minemura in the Japanese journal "Mokuzai Gakaishi” (1978) 8, pp. 587-588, describes the advantage of surface treatment of wood pulp with an aqueous solution of polyethylene glycols with a molecular weight of 4,000 to largely control the light-induced yellowing.
  • a whiteness drop of approx. 3% was achieved after 100 h of UV radiation compared to a whiteness drop of approx. 13% with untreated wood sanding.
  • DE-OS 17 61 775 also recommends the use of polyethylene glycols with molecular weights between 1000 and 6000, preferably between 2000 and 4000, for the production of heat-resistant sterilization and baking paper.
  • polyethylene glycols with molecular weights between 1000 and 6000, preferably between 2000 and 4000, for the production of heat-resistant sterilization and baking paper.
  • the aim was to reduce the strength properties at a temperature of 180 to 200 ° C. within 40 to 60 minutes.
  • the special papers are impregnated with aqueous solutions of polyethylene glycols.
  • the object of the present invention is therefore to produce a yellowing-resistant paper, in particular against practical temperature effects, which does not have the disadvantages of the previously used backing papers made from bleached cellulose, ie that the degree of whiteness is reduced by the action of heat, temperatures above 140 ° C. to 250 ° C., preferably above 200 ° C, within a relatively short time, preferably less than 1 minute, act on the paper, largely suppressed and / or extensive regeneration of the initial degree of whiteness is made possible by suitable formulation of the substance.
  • a polyethylene glycol with a molecular weight below 1000, preferably between 100 and 500, is used. This is the only way to produce yellowing-resistant papers possible with regard to exposure to heat, which additionally have an excellent whiteness regeneration after exposure to heat.
  • stepial papers including decorative raw, release raw and wallpaper raw papers, however, when coating with special plastics and drying them, significantly higher temperatures than 130 ° C act on the material within a relatively short time, usually under one minute.
  • the paper coated with foamable PVC pastes is dried in the production of foam wallpapers at temperatures above 200 ° C. in about 45 to 60 seconds.
  • the production of the base paper in the pH range from 5 to 10, preferably 6.5 to 9.5, with the addition of nonionic, weakly anionic, has proven particularly favorable in the sense of the invention or weakly cationic retention aids based on polyacrylamides or weakly cationic retention aids based on polyamide amines or polyethyleneimines, formaldehyde-free wet strength agents based on polyamidamine-epichlorohydrin resins and weakly cationic sizing agents based on diketene dimers in the usual known amounts, based on the pulp , to achieve their optimal effect as a chemical aid.
  • further sizing agents such as special resin sizes for the acidic to weakly alkaline pH range, or sizing agents, preferably for the neutral to alkaline pH range, e.g. B. on the basis of succinic anhydrides, polyurethanes, maleic anhydrides or acrylic acid esters.
  • customary white pigments such as, for. B. calcium carbonate, kaolin or titanium dioxide in proportions of 5 to 40%, preferably 20 to 30%, based on pulp, are added.
  • hygroscopic additives are chemical auxiliaries based on polyethylene glycols with a molecular weight below 1000, preferably between 100 and 500, glycerol, glycol, sorbitol or glucose or hygroscopic salts, such as chlorine calcium, chlorine magnesium, potassium or sodium lactate.
  • polyethylene glycol has proven to be particularly advantageous in the sense of the invention, the amount of 0.5 to 8 g / m 2 (calculated), preferably 1 to 5 g / m 2 , either in combination with conventional surface sizing agents, such as.
  • polyurethanes maleic anhydrides or acrylic acid esters
  • the proportion of polyethylene glycol can be between 5 to 100%, preferably 50 to 100% of the total amount of the unpigmented coating.
  • Known coating units such as, for. B. roller (including size press) or air brush applicator, which are preferably installed within the paper machine, are used.
  • a pigmented coating of the paper is used for additional considerations, such as improved printability, improved surface imperviousness to water and / or solvents or the like.
  • polyethylene glycol in proportions of 5 to 100%, preferably 10 to 60%, based on the amount of binder used in known coating slip formulations, has also proven to be advantageous according to the invention.
  • Known coating compositions are pigment-binder systems with z. B. kaolin and / or calcium carbonate as a coating pigment and z. B.
  • binders based on aqueous copolymer dispersions of acrylic acid, acrylic acid ester, acrylonitrile, vinyl acetate, butadiene and styrene alone or in combination with natural binders, such as modified starches or carboxymethyl cellulose.
  • Known coating units such as, for. B. roller (including glue press) or doctor blade applicators, such as knife or roller doctor blade applicators, can be used.
  • the paper produced according to the invention and provided with an additional surface application has a high resistance to yellowing, preferably to relatively strong temperature effects and good whiteness regeneration after exposure to heat, and is particularly suitable as a backing material for special wallpapers with, above all, non-full-surface PVC foam application, reusable release papers for synthetic leather webs or for other uncoated or coated special papers that are exposed to particularly high temperatures during their further processing.
  • the pulp mixture was given equivalent amounts (based on dry cellulose) of retention aids, formaldehyde-free wet strength agents and neutral sizing agents with different ionic charges, and only then was the paper sheet formed.
  • the papers were then subjected to a constant practical heat treatment of 220 ° C for 42 s in a special laboratory dryer of the LTF type from Wemer Mathis AG / Niederhasli.
  • the above-mentioned laboratory dryer allows the test material attached to a support frame to be inserted directly into the drying tunnel, thus precisely maintaining the selected temperature.
  • the heat-induced paper yellowing was recorded as the yellowing factor VF.
  • the degree of whiteness was calculated according to ASTM method E 313-73 on the basis of a color difference formula using a known Hunterlab color measuring device.
  • a lower yellowing factor therefore means greater resistance to yellowing.
  • the wet strength agents also deteriorate the yellowing resistance of the papers. If the use of formaldehyde-free wet strength agents in paper cannot be avoided due to additional quality requirements, weakly cationic wet strength agents should be used.
  • the resistance to yellowing is improved by the addition of calcium carbonate as a filler.
  • Neutralizing agents based on diketene dimers also worsen the yellowing resistance of the papers. Again, the least influence is given with these chemical auxiliaries if there is only weak cation activity.
  • the papers made from pulp / auxiliary mixtures prepared according to Example 1 were subjected to irradiation with high-energy ultraviolet light (light-induced yellowing) instead of heat treatment (heat-induced yellowing) and the yellowing factor according to Example 1 was also determined.
  • the papers were UV-irradiated for 64 hours in a known "Suntest" rapid exposure table device from Quarzlampen GmbH, Hanau.
  • a high-intensity xenon emitter is installed, which in connection with a filter system emits a spectrum that is adapted to the sunlight.
  • the amount of ozone that forms is far below the MAK limit values approved by the health authority. With this device, a temporal gathering of exposure processes is possible.
  • this base paper contained a weakly anionic retention agent based on polyacrylamide, a weakly cationic formaldehyde-free wet strength agent on the basis of polyamideamine-epichlorohydrin resin and a weakly cationic neutral sizing agent based on diketene dimer.
  • Example 1 polyethylene glycol (PEG) with a molecular weight of 400 were applied to the base paper produced according to the invention in a laboratory coating system (wire doctor blade) and the papers coated in this way were subjected to a heat treatment according to Example 1.
  • the respective yellowing factor (VF) was determined according to Example 1:
  • Example 2 Correlation considerations analogous to Example 2 between the results of light and heat-induced yellowing of the paper produced in accordance with Example 3 again gave no statistically reliable connection. Accordingly, the different physicochemical reaction mechanisms already assumed in Example 2 also apply to papers treated with PEG.
  • Example 1 The papers were again subjected to a heat treatment analogous to Example 1. The respective degree of yellowing was determined according to Example 1:
  • the pigment line improves the yellowing resistance somewhat compared to the base paper.
  • the yellowing factors of the papers coated with PEG additives are slightly higher than those of the coated papers without PEG additives. This is due to the percentage lower void volume of the pigment layer, which also contain PEG additives.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Materials For Photolithography (AREA)
  • Manufacturing Of Printed Circuit Boards (AREA)
  • Glass Compositions (AREA)

Claims (12)

1. Procédé de fabrication de bandes de papier en cellulose résistant au jaunissement avec addition d'agents d'encollage, de matières de charge, d'agents de rétention et d'agents de résistance à l'humidité, caractérisé en ce que la bande de papier constituée de sulfate de cellulose de bois de peuplier ou d'eucalyptus et de pin avec une proportion de 15:85 à 85:15 présente une granulométrie de 15 à 60° SR et que la bande de papier est pourvue d'un revêtement superficiel constitué d'un additif fortement hygroscopique qui constitue de 5 à 100% de la quantité de liant.
2. Procédé selon la revendication 1, caractérisé en ce que la valeur du pH du mélange de cellulose est comprise, de préférence, entre 6,5 et 9,5.
3. Procédé selon les revendications 1 et 2, caractérisé en ce que l'on ajoute au mélange de cellulose des agents de rétention non ioniques faiblement anioniques ou faiblement cationiques à base de polyacrylamides ou des agents de rétention faiblement cationiques à base de polyéthylèneimine ou de poly- amidimine, des agents de résistance à l'humidité exempts de formaldéhyde et faiblement cationiques à base de résines de polyamidamines épichlorhydrine et des agents d'encollage faiblement cationiques à base de dimères de dicétènes.
4. Procédé selon les revendications 1 à 3, caractérisé en ce que l'on utilise comme agent d'encollage dans le domaine faiblement acide ou alcalin, des agents d'encollage à base d'anhydrides succiniques, de polyuréthanes, d'anhydrides maléiques, d'esters de l'acide acrylique ainsi que des colles de résine.
5. Procédé selon les revendications 1 à 4, caractérisé en ce que l'on ajoute en outre à la cellulose des matières de charge telles que du carbonate de calcium, du kaolin ou du dioxyde de titane en proportions de 5 à 40% et, de préférence, de 20 à 30% rapportés à la cellulose.
6. Procédé selon les revendications 1 à 5, caractérisé en ce que la couche appliquée sur la surface est pigmentée et que la proportion d'additifs hygroscopiques est comprise entre 10 et 60% de la quantité de liant.
7. Procédé selon les revendications 1 à 5, caractérisé en ce que la couche superficielle non pigmentée est appliquée en utilisant des dispositifs d'enduction usuels et bien connus tels qu'appareils d'enduction à cylindre comme, par exemple, presse d'encollage, ou des appareils d'enduction à brosses pneumatiques.
8. Procédé selon la revendication 7, caractérisé en ce que la couche non pigmentée appliquée sur la surface contient des additifs au polyéthylèneglycol, les quantités appliquées variant de 1 à 5 g/m2 (calculés sur la matière solide), soit en combinaison avec des moyens d'encollage de surface usuels tels que amidon modifié, carboxyméthylcellulose, alcool polyvinylique ou produits synthétiques, ou bien encore sous forme d'une simple enduction avec du polyéthylèneglycol.
9. Procédé selon la revendication 6, caractérisé en ce que la couche pigmentée appliquée sur la surface est appliquée en utilisant des dispositifs d'enduction usuels et bien connus tels que appareil d'enduction à cylindre, à couteaux ou à racleur rotatif et, de préférence, avec des additions de polyéthylèneglycol aux compositions de masses d'enduction usuelles et bien connues telles que système pigment-liant avec, par exemple, du kaolin et/ou du carbonate de calcium comme pigment d'enduction et, par exemple, des liants synthétiques à base de dispersions aqueuses de copolymères d'acide acrylique, d'esters d'acide acrylique, d'acrylonitrile, d'acétate de vinyle, de butadiène et de styrène, seuls ou en combinaison avec des liants naturels comme, par exemple, des amidons modifiés ou de la carboxyméthylcellulose.
10. Utilisation de la bande de papier séchée et pourvue d'un revêtement de surface supplémentaire fabriquée selon les revendications 1 à 9 et servant de matériau de support résistant au jaunissement et en particulier à l'effet de la chaleur, à des intervalles de température de 100 à 250°C et, de préférence, supérieurs à 150°C, par exemple pour les papiers de tapissage spéciaux avec enduction de mousse de PVC, papiers de séparation réutilisables plusieurs fois pour bandes de cuir artificiel ou pour d'autres papiers spéciaux, enduits ou non enduits.
11. Procédé selon la revendication 1, caractérisé en ce que la bande de papier est constituée de préférence de sulfate de cellulose de bois de pin et d'eucalyptus, avec une granulométrie de 25 à 45° SR et une proportion de 75:25 à 50:50.
12. Procédé selon les revendications 1 à 9 et 11, caractérisé en ce que le polyéthylèneglycol présente un poids moléculaire inférieur à 1000 et compris, de préférence, entre 100 et 500.
EP87108897A 1986-09-19 1987-06-22 Procédé de fabrication de papiers résistants au jaunissement en particulier en présence de l'action de la chaleur Expired - Lifetime EP0261316B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108897T ATE56768T1 (de) 1986-09-19 1987-06-22 Verfahren zur herstellung vergilbungsresistenter papiere, insbesondere gegenueber hitzeeinwirkung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863631835 DE3631835A1 (de) 1986-09-19 1986-09-19 Verfahren zur herstellung vergilbungsresistenter papiere, insbesondere gegenueber hitzeeinwirkung
DE3631835 1986-09-19

Publications (2)

Publication Number Publication Date
EP0261316A1 EP0261316A1 (fr) 1988-03-30
EP0261316B1 true EP0261316B1 (fr) 1990-09-19

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ID=6309885

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EP87108897A Expired - Lifetime EP0261316B1 (fr) 1986-09-19 1987-06-22 Procédé de fabrication de papiers résistants au jaunissement en particulier en présence de l'action de la chaleur

Country Status (7)

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EP (1) EP0261316B1 (fr)
AT (1) ATE56768T1 (fr)
DD (1) DD261617A5 (fr)
DE (2) DE3631835A1 (fr)
ES (1) ES2002607B3 (fr)
FI (1) FI873987A (fr)
NO (1) NO873924L (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324028C1 (de) * 1993-07-17 1994-12-01 Feldmuehle Ag Stora Beidseitig gestrichenes Rollendruckpapier und Verfahren zu seiner Herstellung
US5622786A (en) * 1994-11-30 1997-04-22 Kimberly-Clark Corporation Polymer-reinforced, eucalyptus fiber-containing paper
DE10163344B4 (de) * 2001-12-21 2006-01-19 Papierfabrik Schoeller & Hoesch Gmbh & Co. Kg Lichtbeständiges Overlaypapier, Verfahren zu dessen Herstellung und Verwendung desselben
US6716310B2 (en) 2001-12-31 2004-04-06 Kimberly-Clark Worldwide, Inc. Process for manufacturing a cellulosic paper product exhibiting reduced malodor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568849A (en) * 1947-05-14 1951-09-25 Carey Philip Mfg Co Vapor barrier paper and the manufacture thereof
US2819986A (en) * 1954-07-26 1958-01-14 Fibreboard Paper Products Corp Low frictional drag coated paper products and method of preparation thereof
DE1761775A1 (de) * 1968-07-05 1971-10-14 Feldmuehle Ag Gegen hohe Temperatur bestaendige Flaechengebilde
DE2118649C3 (de) * 1971-04-17 1979-09-06 Pwa Papierwerke Waldhof-Aschaffenburg Ag, 8000 Muenchen Einseitig mit Vinylidenchloridcopolymerisat-Dispersion beschichtetes Papier
US4282054A (en) * 1977-12-23 1981-08-04 Scott Paper Company Coating composition for release sheets
DE2949306A1 (de) * 1979-12-07 1981-06-11 Letron GmbH, 8750 Aschaffenburg Kunststoff-furnier sowie verfahren zur herstellung eines kunststoff-furnieres
DE3541187C2 (de) * 1985-11-21 1994-10-06 Kaemmerer Gmbh Verfahren zur Herstellung einer mit Kunstharzen imprägnierten Papierbahn sowie deren Verwendung

Also Published As

Publication number Publication date
FI873987A0 (fi) 1987-09-14
DE3631835C2 (fr) 1988-12-15
DE3631835A1 (de) 1988-03-24
NO873924L (no) 1988-03-21
DD261617A5 (de) 1988-11-02
EP0261316A1 (fr) 1988-03-30
ES2002607B3 (es) 1991-02-16
ES2002607A4 (es) 1988-09-01
ATE56768T1 (de) 1990-10-15
NO873924D0 (no) 1987-09-18
FI873987A (fi) 1988-03-20
DE3765066D1 (de) 1990-10-25

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