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WO1998001620A1 - Procede d'affinage d'une solution cellulosique de reserve - Google Patents

Procede d'affinage d'une solution cellulosique de reserve Download PDF

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Publication number
WO1998001620A1
WO1998001620A1 PCT/GB1997/001817 GB9701817W WO9801620A1 WO 1998001620 A1 WO1998001620 A1 WO 1998001620A1 GB 9701817 W GB9701817 W GB 9701817W WO 9801620 A1 WO9801620 A1 WO 9801620A1
Authority
WO
WIPO (PCT)
Prior art keywords
stock
fibres
refining
lyocell
percent
Prior art date
Application number
PCT/GB1997/001817
Other languages
English (en)
Inventor
Stuart David Bailey
Pamela Ann Johnson
Calvin Roger Woodings
Original Assignee
Courtaulds Fibres (Holdings) Limited
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 Courtaulds Fibres (Holdings) Limited filed Critical Courtaulds Fibres (Holdings) Limited
Priority to AU34512/97A priority Critical patent/AU3451297A/en
Publication of WO1998001620A1 publication Critical patent/WO1998001620A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/02—Synthetic cellulose fibres
    • D21H13/08—Synthetic cellulose fibres from regenerated cellulose

Definitions

  • This invention relates to methods for refining aqueous slurries of cellulose fibres, in particular lyocell fibres, notably for use in papermaking. Such slurries are commonly referred to as stocks or papermaking stocks.
  • Lyocell fibres are known, and their manufacture is described for example in US-A-4 , 416 , 698. Such fibres are made by extrusion of cellulose dissolved in an aqueous tertiary amine N-oxide solvent through a die into an aqueous coagulating bath. This process may also be referred to as solvent spinning, and the fibres produced thereby may be referred to as solvent-spun cellulose fibres.
  • the lyocell process has a number of advantages over other processes for the manufacture of cellulosic fibres such as the viscose process, for example reduced environmental emissions. Lyocell fibres have found application both in textile and in non-textile applications. O-A-95/ 14398 describes the manufacture of paper from lyocell fibres and the use of such paper in the manufacture of cigarette filters.
  • a method for refining an aqueous stock which comprises lyocell fibres characterised in that the stock comprises from 0.1 to 5.0, preferably from 0.5 to 3.0, percent by weight sodium hydroxide .
  • the invention further provides a method of making paper comprising lyocell fibres, characterised in that it includes the step of refining an aqueous stock which comprises lyocell fibres and from 0.1 to 5.0, preferably from 0.5 to
  • the concentration of lyocell fibres in the stock is conveniently in the conventional range for papermaking using cellulosic fibres, for example in the range from 0.1 to 2.5 percent by weight.
  • the titre of the lyocell fibres is often in the range from 0.5 to 10 decitex.
  • the lyocell fibres are staple fibres, often having staple length in the range from 0.5 to 10 mm.
  • the lyocell fibres may be unpigmented or may be pigmented, for example with a matting pigment such as titanium dioxide.
  • the temperature of the stock submitted to refining is commonly at or around ambient temperature. The temperature rises during the refining process because of the mechanical work performed during it.
  • Suitable refining equipment for use in the method of the invention includes conventional apparatus such as a hollander, hydrapulper, valley beater, disintegrator or disc refiner.
  • the method of the invention may be performed batchwise or continuously.
  • the stock submitted to the method of the invention may contain one or more additives, for example dispersing or wetting agents, in known manner.
  • the refining method of the invention permits more rapid refining than when a conventional stock containing no sodium hydroxide is used.
  • paper made from a stock refined by the method of the invention may be found to exhibit improved tensile properties, including tensile strength, burst strength and tear strength, in comparison with paper made from a stock refined in conventional manner.
  • Suitable disintegrators are available from Messmer Instruments Limited, Gravesend, Kent, UK and from Buechel van de Korput BV, Veemendaal, Netherlands.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

Une solution de réserve aqueuse comprenant des exo-fibres peut être affinée plus rapidement si ladite solution contient entre 0,1 et 5,0 pour cent en poids d'hydroxyde de sodium. Du papier fabriqué à partir d'une solution de réserve affinée selon le présent procédé révèle des propriétés de traction améliorées, y compris des propriétés de résistance à la force de traction ultime, de résistance à l'éclatement et de résistance à la déchirure.
PCT/GB1997/001817 1996-07-08 1997-07-04 Procede d'affinage d'une solution cellulosique de reserve WO1998001620A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU34512/97A AU3451297A (en) 1996-07-08 1997-07-04 Method for refining cellulose stock

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9614311.0A GB9614311D0 (en) 1996-07-08 1996-07-08 Refining cellulose stock
GB9614311.0 1996-07-08

Publications (1)

Publication Number Publication Date
WO1998001620A1 true WO1998001620A1 (fr) 1998-01-15

Family

ID=10796543

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/001817 WO1998001620A1 (fr) 1996-07-08 1997-07-04 Procede d'affinage d'une solution cellulosique de reserve

Country Status (3)

Country Link
AU (1) AU3451297A (fr)
GB (1) GB9614311D0 (fr)
WO (1) WO1998001620A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027391A1 (fr) * 2001-09-24 2003-04-03 The Procter & Gamble Company Feuille absorbante souple

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2083575A (en) * 1933-09-01 1937-06-15 Raybestons Manhattan Inc Method of modifying cellulose pulp for paper making purposes
US4416698A (en) * 1977-07-26 1983-11-22 Akzona Incorporated Shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent and a process for making the article
EP0572921A1 (fr) * 1992-06-01 1993-12-08 Kuraray Co., Ltd. Séparateur pour les piles alcalines
WO1995014398A1 (fr) * 1993-11-29 1995-06-01 Courtaulds Fibres (Holdings) Limited Filtres pour cigarettes
WO1995035399A1 (fr) * 1994-06-22 1995-12-28 Courtaulds Fibres (Holdings) Limited Fibre de cellulose filee avec solvant et son procede de production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2083575A (en) * 1933-09-01 1937-06-15 Raybestons Manhattan Inc Method of modifying cellulose pulp for paper making purposes
US4416698A (en) * 1977-07-26 1983-11-22 Akzona Incorporated Shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent and a process for making the article
EP0572921A1 (fr) * 1992-06-01 1993-12-08 Kuraray Co., Ltd. Séparateur pour les piles alcalines
WO1995014398A1 (fr) * 1993-11-29 1995-06-01 Courtaulds Fibres (Holdings) Limited Filtres pour cigarettes
WO1995035399A1 (fr) * 1994-06-22 1995-12-28 Courtaulds Fibres (Holdings) Limited Fibre de cellulose filee avec solvant et son procede de production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOHNSON, P. A.: "Courtaulds' LyocellRG Fiber for Papermaking Applications", 1997 NONWOVENS CONFERENCE: PROCEEDINGS (TAPPI AND AMERICAN FILTRATION SOCIETY): 91-100 (MARCH 17, 1997;TAPPI PRESS), XP002042354 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027391A1 (fr) * 2001-09-24 2003-04-03 The Procter & Gamble Company Feuille absorbante souple
US6841038B2 (en) 2001-09-24 2005-01-11 The Procter & Gamble Company Soft absorbent web material
AU2002336738B2 (en) * 2001-09-24 2005-11-03 The Procter & Gamble Company A soft absorbent web material
CN1324193C (zh) * 2001-09-24 2007-07-04 宝洁公司 柔软的吸收性纤维网材料

Also Published As

Publication number Publication date
AU3451297A (en) 1998-02-02
GB9614311D0 (en) 1996-09-04

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