EP0954635A1 - Procede de fabrication de produits de papier encolles en surface et composition d'encollage utilisee - Google Patents

Procede de fabrication de produits de papier encolles en surface et composition d'encollage utilisee

Info

Publication number
EP0954635A1
EP0954635A1 EP98905312A EP98905312A EP0954635A1 EP 0954635 A1 EP0954635 A1 EP 0954635A1 EP 98905312 A EP98905312 A EP 98905312A EP 98905312 A EP98905312 A EP 98905312A EP 0954635 A1 EP0954635 A1 EP 0954635A1
Authority
EP
European Patent Office
Prior art keywords
polymer
water soluble
water insoluble
starch
weight
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.)
Withdrawn
Application number
EP98905312A
Other languages
German (de)
English (en)
Inventor
Franck Vanhecke
Ivan F. G. Colman
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.)
Suez WTS USA Inc
Original Assignee
BetzDearborn Inc
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 BetzDearborn Inc filed Critical BetzDearborn Inc
Publication of EP0954635A1 publication Critical patent/EP0954635A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • 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
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

  • the present invention relates to a process of making surface sized paper products by applying to the surface an aqueous, starch containing surface sizing composition followed by drying. Further, the invention relates to an aqueous, starch containing surface sizing composition.
  • Multiple-purpose printing paper (inkjet, copy, writing) is surface sized for quality improvement, in particular printabilit . This is generally done by applying an aqueous blend of starch, optical brightener (optional), salt and a polymer to the paper. The polymer is added in order to improve the film-forming properties of the surface size.
  • Water soluble polymers typically provide the following advantages: high friction, improved optical density of the inks, reduced bleeding, wicking, strike through. Disadvantages of water soluble polymers are: extensive foam formation, reduced waterfastness .
  • Water insoluble polymers typically have the following advanta- ges : no foam formation of the surface size itself, improved film properties (more elastic, water resistant), good waterfastness, improved optical density of the inks, reduced bleeding, wicking, strike through.
  • advanta- ges no foam formation of the surface size itself, improved film properties (more elastic, water resistant), good waterfastness, improved optical density of the inks, reduced bleeding, wicking, strike through.
  • One disadvantage of water insoluble polymers is: low friction (reducing mechanical sheet control during prin- ting) .
  • Another disadvantage of the hydrophobic water insoluble polymers is that they are not compatible with the hydrophilic starch, unless special additives are used as compatibilizers . The result is that the sheet behaves as if it was covered with starch only and the printability is not improved that much.
  • non-compatible water insoluble polymer is only loosely connected with the starch film covering the paper sheet. Upon rewetting (e.g. during printing) the polymer is easily separated from the starch. In contrast, the polymer that is compatible with the solid film is "anchored" in the starch. Upon rewetting the polymer remains attached to the starch resulting in hydrophobic micro patches.
  • a known method for compatibilizing water insoluble polymers consists of the addition of cationic starch during the synthesis of the water insoluble polymer by emulsion copolymerisation at high temperature (see DE 43 38 486 Al). Further it is known from PCT application WO 96/09345 and corresponding US patents 5 362 573, 5 460 645 and 5 472 485 to improve surface sizing by adding to the starch containing aqueous surface sizing composition an alkali salt of a Group IV metal (e.g. zirconium, hafnium and titanium) .
  • a Group IV metal e.g. zirconium, hafnium and titanium
  • the sheet surface sized with a combination of starch and non-compatible polymer 1 behaves if it was only covered with starch, i.e. there is only a minor improvement.
  • the sheet surfaced sized with a combination of starch and compatible polymer 2 behaves more hydropho- bically than in the case of starch combined with incompatible polymer.
  • Cobb 30 would indicate sufficient compatability with the starch so that good printability is obtained.
  • aqueous surface sizing composition comprising besides starch a water insoluble polymer and a water soluble polymer.
  • present inventon relates to a process of making surface sized paper products by applying to the surface an aqueous, starch containing surface sizing composition followed by drying, characterized in that said aqueous surface sizing composition further comprises a) at least one water soluble polymer and b) at least one water insoluble polymer.
  • the invention relates to an aqueous, starch containing surface sizing composition for use in a process of making surfa- ce sized paper products, said composition further comprising at least one water soluble polymer and at least one water insoluble polymer .
  • polymer is used herein in its broad meaning and also covers copolymers obtained by polymerizing two or more monomers.
  • the paper products useful for surface sizing according to the invention can be any paper or cardboard obtained from known raw materials.
  • the paper or cardboard is internally sized.
  • Internal sizing can be achieved with any of the known internal sizing agents (reference is made to the above discussed prior art and particularly DE 43 38 486 Al , page 2, lines 50 to 64).
  • Preferred internal sizing agents are alkylketene dimers (AKD) , alkenyl succinic anhydrides (ASA) and rosins (preferably fortified rosins).
  • ASA alkenyl succinic anhydrides
  • rosins preferably fortified rosins.
  • the present invention is particularly advantageous with paper products containing fillers like calcium carbonate and the like (see again DE 43 38 486 Al, page 2, lines 54 to 58) .
  • the starch useful in the present invention can be any starch like natural, degraded, converted or chemically modified starches (see again the above cited prior art references). Preferred are cationic starches.
  • the water soluble polymers useful in the present invention are well known and many of them are marketed as surface sizing polymers .
  • polymers obtained by using one or more of styrene, acrylate and methacrylate are particularly useful.
  • copolymers of styrene and comonomers like acrylic acid and maleic acid or maleic anhydride (SMA) are used. These copolymers are commercially available or can be readily prepared according to known methods.
  • water soluble polymers useful in the present invention are polyacrylamides , in particular cationic polyacry- lamides (cPAM). Again these polymers are commercially available or can be readily prepared according to known methods .
  • cPAM cationic polyacry- lamides
  • water soluble polymers are polyvinyl alcohols, polyvinyl pyrrolidones , polyamido amides, polyethylene imines and polyvinyl amines, all of which are commercially available or readily obtainable by known methods.
  • the water insoluble polymers useful in the present invention are water dispersible and are also known for surface sizing (see again DE 43 38 486 Al ) .
  • Particularly useful are polymers obtained by using styrene or butylacrylate or both.
  • Preferred are copolymers of styrene and/or butylacrylate with acrylic acid or butadiene (e.g. a copolymer obtained from a monomer blend comprising 42 mol % of styrene, 28 mol % of butylacrylate and 30 mol % of acrylic acid) .
  • these polymers are commercially available or can be readily prepared by known methods.
  • the particles are obtained by emulsion polymerisation in form of latices wherein the inside of the particles consists mainly of the hydrophobic monomers (styrene, butylacrylate) and the outside of the particles consists mainly of the hydrophilic monomers (e.g. acrylic acid), forming "hairy tails" stabilizing the hydrophobic particles.
  • the hydrophobic monomers styrene, butylacrylate
  • the outside of the particles consists mainly of the hydrophilic monomers (e.g. acrylic acid), forming "hairy tails" stabilizing the hydrophobic particles.
  • these water insoluble polymers are selected with regard to glass-transition temperature, minimum film-forming temperature and acrylic acid content.
  • the aqueous surface sizing composition comprises conventional amounts of starch, e.g. 10 to 200 g/1, preferably about 15 to 50 g/1.
  • the water soluble and water insoluble polymers are used in a weight ratio of 2 - 50% to 98 - 50%, preferably 3 - 25% to 97 - 75%, and particularly preferred 5 - 10% to 95 - 90% (e.g. 7 - 8% to 93 - 92%).
  • the total amount of water soluble and water insoluble polymers can vary but usually is in the range of 2 - 25% by weight, based on the starch, preferably 5 - 20% by weight, and particularly preferred 10 - 15% by weight (e.g. 12 - 13% by weight) .
  • the total solids content or active content of the aqueous surface sizing composition is also within the usual ranges (see the above cited prior art references).
  • the surface sizing composition comprises 1 - 20% by weight and particularly preferred 2 - 10% by weight of active ingredients.
  • weights, weight ratios and weight percentages are based on the solids content, i.e. these values relate to the solid contents of the aqueous solutions or dispersions generally used when practising the present invention.
  • the aqueous surface sizing composition according to the present invention is applied to the surface of the paper product in the normal manner e.g. by a size applicator, preferably during the paper making process (see again the above cited prior art references) .
  • suitable amounts can be determined by tests.
  • the uptake of service sizing composition is in the range of 5 to 50 kg (solids) per ton paper, corresponding to 0.5 to 5% by weight (solids) based on the weight of the pa- per.
  • very good results are already obtained with relatively low amounts in the range of 0.5 to 1.5 % by weight .
  • the present invention provides a new way for blending (advantageously cold blending) of surface size water soluble and water insoluble polymers resulting in a synergistic improvement of the quality of the paper products, particularly print quality. It is believed that the water soluble polymer functions as a compati- bilizer for the water insoluble polymer.
  • the polymer blend performs better than either one of the pure polymers on its own. All benefits of both species are maintained and the drawbacks are covered.
  • the resulting paper product shows no foam, high friction, improved film properties (elasticity, water resistan- ce) , good waterfastness, improved optical density of the inks, reduced bleeding, wicking and strike through.
  • additional components for improving surface sizing can be employed.
  • Useful are for example the Group IV metal salts disclosed in PCT application WO 96/09345 and corresponding US patents 5 362 573, 5 460 645 and 5 472 485, the disclosure of which is herewith included by reference.
  • a preferred salt is ammonium zirconium carbonate (AZC) .
  • Such additional components are generally added in an amount of 0.05 - 5% by weight and preferably 0.1 - 2.5% by weight (e.g. 1,4 - 2,0% by weight), based on the combined weight of starch and water soluble and water insoluble polymers.
  • the aqueous surface sizing composition usually also comprises optical brightener and salt like alkali salts, e.g. sodium chloride. Furthermore it can include auxiliary materials like defoamers, bactericides , pigments, alkali, and the like as required (compare again the above cited prior art references ) .
  • AKD sized sheets were surface sized in a Mathis Size Press.
  • the surface sizing mixture was 5% active and contained starch (Perlsize K98L sold by Lyckeby Staerkelsen) , polymer, optical brightener (Tinopal ABP from Ciba) , sodium chloride.
  • the relative ratio by weight was 44/6/3/1.5 for starch/polymer/optical brightner/salt in the surface size mixture.
  • polymer includes all solid ingredients of the below defined dispersions, solutions and blends .
  • the sheets were dried in a Schroeter sheet dryer and subsequently test-printed on a HP Inkjet 500C. The print quality was evaluated using a MacBeth colour densitometer . The Hewlett Packard test was used to measure optical density of the composite black colour and the waterfastness of the black ink.

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  • Paper (AREA)

Abstract

L'invention concerne un procédé de fabrication de produits de papier encollés en surface, utilisant une composition d'encollage aqueuse, à base d'amidon. L'invention traite aussi d'une composition d'encollage aqueuse, à base d'amidon, correspondante. Outre l'amidon, au moins un polymère soluble à l'eau et au moins un polymère insolubles à l'eau sont utilisés. Cette combinaison permet d'obtenir un encollage de surface qui évite les inconvénients d'un polymère soluble à l'eau ou d'un polymère insoluble à l'eau utilisés seuls, mais en même temps, conserve les avantages de ces polymères lorsqu'ils sont utilisés seuls.
EP98905312A 1997-01-22 1998-01-20 Procede de fabrication de produits de papier encolles en surface et composition d'encollage utilisee Withdrawn EP0954635A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19702021 1997-01-22
DE19702021 1997-01-22
PCT/EP1998/000266 WO1998032920A1 (fr) 1997-01-22 1998-01-20 Procede de fabrication de produits de papier encolles en surface et composition d'encollage utilisee

Publications (1)

Publication Number Publication Date
EP0954635A1 true EP0954635A1 (fr) 1999-11-10

Family

ID=7817953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98905312A Withdrawn EP0954635A1 (fr) 1997-01-22 1998-01-20 Procede de fabrication de produits de papier encolles en surface et composition d'encollage utilisee

Country Status (6)

Country Link
EP (1) EP0954635A1 (fr)
JP (1) JP2001508507A (fr)
AU (1) AU6095098A (fr)
CA (1) CA2277962A1 (fr)
WO (1) WO1998032920A1 (fr)
ZA (1) ZA98434B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6162328A (en) * 1997-09-30 2000-12-19 Hercules Incorporated Method for surface sizing paper with cellulose reactive and cellulose non-reactive sizes, and paper prepared thereby
JP4627339B2 (ja) * 1999-09-21 2011-02-09 ミヨシ油脂株式会社 生分解性樹脂水系分散体及び生分解性複合材料
EP1109326A1 (fr) 1999-12-15 2001-06-20 Lucent Technologies Inc. Détecteur de préambule pour un récepteur AMRC
US7943789B2 (en) 2002-12-17 2011-05-17 Kemira Oyj Alkenylsuccinic anhydride composition and method of using the same
TW200504265A (en) * 2002-12-17 2005-02-01 Bayer Chemicals Corp Alkenylsuccinic anhydride surface-applied system and uses thereof
US6884468B1 (en) 2003-10-27 2005-04-26 Basf Ag Method of making a paper coating using a blend of a vinyl aromatic-acrylic polymer dispersion with a vinyl aromatic-diene polymer dispersion
FI123481B (fi) 2007-02-05 2013-05-31 Upm Kymmene Corp Menetelmä painopaperin valmistamiseksi ja seoskoostumus
CN110904729B (zh) * 2019-11-27 2022-08-05 佛山市纳创纳米科技有限公司 一种用于宣纸的表面施胶液及其制备方法和应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05177921A (ja) * 1992-01-07 1993-07-20 Mitsubishi Paper Mills Ltd 記録用紙
US5591489A (en) * 1995-05-04 1997-01-07 Sequa Chemicals, Inc. Process for surface sizing paper or paperboard
AU1408897A (en) * 1995-12-05 1997-07-14 Dow Chemical Company, The Method for externally sizing fibrous materials
US5741889A (en) * 1996-04-29 1998-04-21 International Paper Company Modified rosin emulsion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9832920A1 *

Also Published As

Publication number Publication date
ZA98434B (en) 1998-07-29
CA2277962A1 (fr) 1998-07-30
AU6095098A (en) 1998-08-18
JP2001508507A (ja) 2001-06-26
WO1998032920A1 (fr) 1998-07-30

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