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EP1982017A1 - Procédé de production de papier optiquement éclairci - Google Patents

Procédé de production de papier optiquement éclairci

Info

Publication number
EP1982017A1
EP1982017A1 EP06830803A EP06830803A EP1982017A1 EP 1982017 A1 EP1982017 A1 EP 1982017A1 EP 06830803 A EP06830803 A EP 06830803A EP 06830803 A EP06830803 A EP 06830803A EP 1982017 A1 EP1982017 A1 EP 1982017A1
Authority
EP
European Patent Office
Prior art keywords
optically brightened
process according
fibres
paper
pulp
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.)
Granted
Application number
EP06830803A
Other languages
German (de)
English (en)
Other versions
EP1982017B1 (fr
Inventor
Achim Kohler
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.)
Clariant Finance BVI Ltd
Original Assignee
Clariant International Ltd
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 Clariant International Ltd filed Critical Clariant International Ltd
Priority to EP06830803A priority Critical patent/EP1982017B1/fr
Publication of EP1982017A1 publication Critical patent/EP1982017A1/fr
Application granted granted Critical
Publication of EP1982017B1 publication Critical patent/EP1982017B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching
    • 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
    • D21H3/00—Paper or cardboard prepared by adding substances to the pulp or to the formed web on the paper-making machine and by applying substances to finished paper or cardboard (on the paper-making machine), also when the intention is to impregnate at least a part of the paper body
    • D21H3/82—Paper or cardboard prepared by adding substances to the pulp or to the formed web on the paper-making machine and by applying substances to finished paper or cardboard (on the paper-making machine), also when the intention is to impregnate at least a part of the paper body by adding insoluble coloured substances, e.g. powders, fibres, pieces of metal, for obtaining different colours in the paper fancy papers; substances characterised by their physical appearance, e.g. form, rather than by their chemical constitution
    • 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
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/26—Polyamides; Polyimides

Definitions

  • the present invention relates to a process for the production of optically brightened paper by treating the pulp suspension with an optically brightened filler composition.
  • a high degree of brightness is a desirable property of paper and cardboard articles.
  • the most important raw material of the papermaking industry is pulp, which naturally absorbs blue light and therefore is yellowish in color and imparts a dull appearance to the paper.
  • Optical brighteners are used in the papermaking industry to compensate for the absorption of blue light by absorbing UV-light with a maximum wavelength of 350- 380nm and converting it into visible blue light with a maximum wavelength of 440nm.
  • brighteners other than those of the triazinylaminostilbene type must be used; in particular, brighteners typically used for the optical brightening of textiles, such as those of the benzoxazole, naphthalimide, triazolylcoumarin or triazinylpyrene types.
  • Such brighteners are however typically much more expensive, and can only be applied with difficulty to either pulp or to the paper surface.
  • EP-A-801 700 overcomes some of these problems by describing the use of optically brightened polyacrylonitrile powder to prepare white coating slips for paper.
  • Preferred optical brighteners are those typically used to provide a high lightfastness on textiles, for example of the triazolylcoumarin or benzoxazole type. Papers prepared using such coating slips show excellent whitening effects with high lightfastness. There is no suggestion however that this approach could be used to prepare optically brightened papers by a more economic pulp application. The economic use of textile brighteners to prepare optically brightened papers is therefore a difficult problem to which a satisfactory solution has not yet been found.
  • an object of the instant invention is a process for optical brightening of paper wherein a filler composition comprising optically brightened plastic fibres is added to the pulp suspension.
  • Said fibres preferably can be made from polyester, polyethylene, polypropylene or polyamide. Most preferably the fibres are made from polyester.
  • the fibres have a fineness between 1 and 10 dtex and are cut to a length of between 0.1 and 1mm, preferably they have a fineness between 1 and 2 dtex and a length between 0.2 and 0.6mm.
  • polyester fibres The preparation of polyester fibres is well-known and is described, for example, in "Handbook of Fiber Chemistry” by Menachem Lewin published in 1998 by Marcel Dekker, page 18.
  • optically brightened polyester is equally well-known and is described, for example, in GB 835,898 and EP-A-1 379 585.
  • the fibres are preferably optically brightened with compounds of formulae (1 ) to (4)
  • R 1 to R 8 independently of one another are hydrogen, Ci-C 2 o-alRyl or groups of the formula -COORg, where R 9 is hydrogen, Ci-C 2 o-alkyl or phenyl, or R 1 to R 8 are a group of the formula -SO 2 Ri O , where Ri 0 is hydrogen, C r C 10 -alRyl or Ci-C 10 -hydroxyalkyl, and A is stilbene, naphthalene, phenylene, thiophenylene or biphenylene, or mixtures of said compounds.
  • More preferred optical brighteners are compounds of formula (1 ) where R-i to R 8 independently of one another are hydrogen or Ci-C 4 -alkyl, and A is stilbene, naphthalene, phenylene, thiophenylene or biphenylene.
  • optical brighteners are compounds of formula (1 ) where R 1 to R 8 independently of one another are hydrogen or methyl, and A is stilbene.
  • the optically brightened plastic fibre contains between 10 and 500 ppm optical brightener, preferably between 20 and 250 ppm.
  • the pulp may be any conventional pulp used to produce paper, for example stone groundwood pulp, thermomechanical pulp, chemithermomechanical pulp, semichemical pulp, sulphite pulp or kraft pulp, or a mixture of these.
  • the pulp suspension is treated with 2 to 60%, preferably 10 to 40% by weight, based on weight of dry pulp, of the instant filler composition.
  • the filler composition may be added to the pulp suspension either in dry form or, preferably, in the form of an aqueous dispersion. It may be useful to add a dispersing agent, particularly suitable dispersing agents being of the type described in EP-A-964 015. Finally, the paper is formed on a wire screen of a conventional paper machine, pressed and dried.
  • the present invention also provides an optically brightened paper produced according to the instant process and which comprises 2 to 60%, preferably 10 to 40% by weight, based on weight of dry pulp, of the filler composition of the instant invention.
  • the optically brightened paper may also contain other additives commonly employed in the papermaking industry.
  • additives include sizing agents (for example, rosin, starch, alkyl ketene dimer, alkenyl succinic anhydride), wet strength resins (for example, poly-aminoamide-epichlorohydrin resins), retention- and drainage aids (for example, poly-aluminium chloride, polydiallyldimethylammonium chloride), and shading dyes.
  • polyester fibres of fineness 1.7 dtex made by known methods, containing 0.014% of a mixture of optical brighteners of structures 5a-c in an approximate ratio of 30:50:20, and cut to 0.5 mm, are stirred with 0.025 parts dispersing agent (Cartaspers® PSM, commercially available from Clariant) and 1000 parts water for 5 minutes to form a 0.5% dispersion of optically brightened fibres.
  • dispersing agent Cartaspers® PSM, commercially available from Clariant
  • x parts of the 0.5% dispersion of optically brightened fibres are then added to (1000-x) parts of a stirred 0.5% aqueous suspension of a 50:50 mixture of bleached birch and spruce wood pulps beaten to a Schopper-Riegler freeness of 35°.
  • Each paper sheet is measured for R457 Brightness on a calibrated Minolta 3270D spectrophotometer.
  • Fig 1 Effect of exposure to light over 280 hours on R457 Brightness of papers containing 5-30% optically brightened polyester fibres.
  • a paper sheet is made as in the Example, but without the addition of optically brightened polyester fibres.
  • Comparative Example 4 Unbrightened polyester fibres and optical brightener (5a-c)
  • Fig 2 Effect of exposure to light over 280 hours on R457 Brightness of papers.
  • Comparative Examples demonstrate the advantage of the invention in providing a bright paper with excellent lightfastness.

Landscapes

  • Paper (AREA)

Abstract

La présente invention concerne un procédé de production de papier optiquement éclairci en traitant la suspension de pâte à papier avec une préparation de charge optiquement éclaircie comprenant des fibres plastiques optiquement éclaircies, préférentiellement des fibres de polyester, ce qui permet d'obtenir une solidité à la lumière étonnamment élevée du papier résultant.
EP06830803A 2006-01-26 2006-12-22 Procédé de production de papier optiquement éclairci Not-in-force EP1982017B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06830803A EP1982017B1 (fr) 2006-01-26 2006-12-22 Procédé de production de papier optiquement éclairci

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06001577 2006-01-26
EP06830803A EP1982017B1 (fr) 2006-01-26 2006-12-22 Procédé de production de papier optiquement éclairci
PCT/EP2006/070148 WO2007085337A1 (fr) 2006-01-26 2006-12-22 Procédé de production de papier optiquement éclairci

Publications (2)

Publication Number Publication Date
EP1982017A1 true EP1982017A1 (fr) 2008-10-22
EP1982017B1 EP1982017B1 (fr) 2009-06-17

Family

ID=36636660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830803A Not-in-force EP1982017B1 (fr) 2006-01-26 2006-12-22 Procédé de production de papier optiquement éclairci

Country Status (17)

Country Link
US (1) US20100230061A1 (fr)
EP (1) EP1982017B1 (fr)
JP (1) JP2009524747A (fr)
KR (1) KR20080095862A (fr)
CN (1) CN101365843A (fr)
AR (1) AR059215A1 (fr)
AT (1) ATE434083T1 (fr)
AU (1) AU2006336948A1 (fr)
BR (1) BRPI0621286A2 (fr)
CA (1) CA2636234A1 (fr)
DE (1) DE602006007388D1 (fr)
IL (1) IL192985A0 (fr)
NO (1) NO20083311L (fr)
RU (1) RU2008134714A (fr)
TW (1) TW200738936A (fr)
WO (1) WO2007085337A1 (fr)
ZA (1) ZA200806504B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014057363A1 (fr) * 2012-10-10 2014-04-17 Invista North America S.A R.L. Compositions polyamide et procédés associés

Family Cites Families (26)

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GB835898A (en) * 1955-06-17 1960-05-25 Ciba Ltd New ª‡:ª‰-di-[benzoxazolyl-(2)]-ethylenes
US3342921A (en) * 1966-03-16 1967-09-19 West Virginia Pulp & Paper Co Process for producing fibrous filler having high wet end retention
US3597312A (en) * 1969-05-07 1971-08-03 Westvaco Corp Synthetic fibrous filler and paper containing the filler
BE755820A (fr) * 1969-09-12 1971-03-08 Sandoz Sa Composition de blanchiment optique
US3871898A (en) * 1969-11-14 1975-03-18 Ciba Geigy Ag Process for the optical brightening of organic fibre material
US3775353A (en) * 1971-11-05 1973-11-27 Westvaco Corp Blushed polystyrene pigment
DE2420473A1 (de) * 1974-04-27 1975-12-11 Bayer Ag Weisstoenen von polyesterfasern
US3983288A (en) * 1974-11-04 1976-09-28 Eastman Kodak Company Fibers and fabrics containing optical brightening agents
DE2500915C3 (de) * 1975-01-11 1980-09-18 Bayer Ag, 5090 Leverkusen Verfahren zum Weißtönen von Textilfasem aus Polyestern oder Mischfasern aus Polyestern und Cellulose oder Wolle
US4095939A (en) * 1977-05-09 1978-06-20 Eastman Kodak Company Optically brightened polyesters with 2,5-bis-(p-carboalkylstyryl)-oxadiazole
US4460647A (en) * 1982-09-13 1984-07-17 Celanese Corporation Fibrets suitable for paper opacification
US4859539A (en) * 1987-03-23 1989-08-22 Eastman Kodak Company Optically brightened polyolefin coated paper support
ES2029345T3 (es) * 1987-08-26 1992-08-01 Ciba-Geigy Ag Blanqueadores opticos de dispersion.
US5213883A (en) * 1991-05-14 1993-05-25 The Mead Corporation Decor sheet containing fibrets
DE4230655A1 (de) * 1992-09-14 1994-03-17 Ciba Geigy Verfahren zur Verbesserung von Weißgrad, Helligkeit und Farbort von Faserstoffen
DE19500195A1 (de) * 1995-01-05 1996-07-11 Bayer Ag Verwendung weißgetönter Kunststoffe zum Weißtönen von Papierstreichmassen und derart weißgetönte Papierstreichmassen
US5759349A (en) * 1995-12-14 1998-06-02 Westvaco Corporation Lumen loading of hygienic end use paper fibers
NZ331438A (en) * 1997-09-16 2000-01-28 Ciba Sc Holding Ag A method of increasing the whiteness of paper by using a formulation containing a swellale layered silicate and an optical brightener 4,4-bis-(triazinylamino)-stilbene-2,2-disulphonic acid
DE10114696A1 (de) * 2001-03-23 2002-11-07 Clariant Gmbh Verfahren zur Herstellung von optisch aufgehelltem Polyester
US6893473B2 (en) * 2002-05-07 2005-05-17 Weyerhaeuser.Company Whitened fluff pulp
DE10237186A1 (de) * 2002-08-14 2004-03-18 Clariant Gmbh Verfahren zum Aufhellen synthetischer Fasern und Kunstoffe mit granulierten optischen Aufhellern
US6818367B2 (en) * 2003-04-15 2004-11-16 Eastman Kodak Company Support with reduced optical brightener migration
US20040260034A1 (en) * 2003-06-19 2004-12-23 Haile William Alston Water-dispersible fibers and fibrous articles
DE102004011957A1 (de) * 2004-03-11 2005-09-29 Basf Ag Verfahren zum optischen Aufhellen von synthetischen Fasern oder von synthetischen Fasern in Mischung mit natürlichen Fasern
US7638016B2 (en) * 2005-02-19 2009-12-29 International Paper Company Method for treating kraft pulp with optical brighteners after chlorine bleaching to increase brightness
US7622022B2 (en) * 2006-06-01 2009-11-24 Benny J Skaggs Surface treatment of substrate or paper/paperboard products using optical brightening agent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007085337A1 *

Also Published As

Publication number Publication date
NO20083311L (no) 2008-10-27
AR059215A1 (es) 2008-03-19
IL192985A0 (en) 2009-02-11
CN101365843A (zh) 2009-02-11
CA2636234A1 (fr) 2007-08-02
DE602006007388D1 (de) 2009-07-30
ZA200806504B (en) 2009-11-25
ATE434083T1 (de) 2009-07-15
WO2007085337A1 (fr) 2007-08-02
RU2008134714A (ru) 2010-03-10
KR20080095862A (ko) 2008-10-29
EP1982017B1 (fr) 2009-06-17
BRPI0621286A2 (pt) 2011-12-06
JP2009524747A (ja) 2009-07-02
AU2006336948A1 (en) 2007-08-02
TW200738936A (en) 2007-10-16
US20100230061A1 (en) 2010-09-16

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