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WO1997001431A1 - Processus de production d'un tissu destine a la fabrication du papier - Google Patents

Processus de production d'un tissu destine a la fabrication du papier Download PDF

Info

Publication number
WO1997001431A1
WO1997001431A1 PCT/US1996/011086 US9611086W WO9701431A1 WO 1997001431 A1 WO1997001431 A1 WO 1997001431A1 US 9611086 W US9611086 W US 9611086W WO 9701431 A1 WO9701431 A1 WO 9701431A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
machine direction
process according
dryer
papermakers
Prior art date
Application number
PCT/US1996/011086
Other languages
English (en)
Inventor
Hippolit Gstrein
Walter Michalek
Original Assignee
Huyck Licensco, 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 Huyck Licensco, Inc. filed Critical Huyck Licensco, Inc.
Priority to AU64810/96A priority Critical patent/AU6481096A/en
Publication of WO1997001431A1 publication Critical patent/WO1997001431A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
    • D06C15/02—Calendering, pressing, ironing, glossing or glazing textile fabrics between co-operating press or calender rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths

Definitions

  • the present invention relates to papermakers' fabrics and especially to papermaking fabrics for the dryer or forming sections of a papermaking machine.
  • a water slurry or suspension of cellulose fibers known as the paper "stock”
  • the forming belt provides a papermaking surface and operates as a filter to separate the cellulosic fibers from the aqueous medium from the cellulosic fibers by providing for the drainage of the aqueous medium through its mesh openings, also known as drainage holes, by vacuum means or the like located on the drainage side of the fabric.
  • the somewhat self- supporting paper web is transferred to the press section of the machine and onto a press fabric, where still more of its water content is removed by passing it through a series of pressure nips formed by cooperating press rolls, these press rolls serving to compact the web as well.
  • the paper web is transferred to a dryer section where it is passed about and held in heat transfer relation with a series of heated, generally cylindrical rolls to remove still further amounts of water therefrom by evaporation.
  • Dryer fabrics are used in the dryer section of papermaking machinery to support the moist paper web as it encounters the heated rolls.
  • the dryer fabric is formed into a conveyor belt-like shape and incorporates at least a woven base fabric with a smooth top surface for contacting the paper web.
  • the surface of the dryer fabric is determinative of the marking characteristics found on the paper. If the surface of the dryer fabric is smooth, the contact paper web will exhibit less marking, thereby resulting in high quality paper.
  • a dryer fabric with a uniform and smooth surface provides increased contact area between the web and the heated rolls of the dryer section, thereby increasing the heat transfer between the heated rolls of the dryer section and the paper web and leading to more efficient sheet dewatering.
  • the standard method for producing a dryer fabric with these characteristics has been to provide a high fabric density with weave patterns having long machine or cross machine direction floatings .
  • Another approach has been to form the dryer fabric from flat monofilament materials in the machine direction of the fabric.
  • a process for producing a papermakers' fabric wherein the paper contacting surface of the fabric is molded between two preferably heated surfaces adapted to apply contact pressure to the fabric to optimally smoothen the paper contacting surface of the fabric and picnicize caliper variations in the fabric.
  • the two surfaces are the surfaces of two cooperating rolls formed in a nip press. The fabric is passed through the nip press into engagement with the heated rolls thereby molding and smoothening the surface of the fabric.
  • FIGS. 1-3 are unity textile design charts for illustrating preferred embodiments of a dryer fabric for use in connection with the present invention.
  • FIGS. 4-8 are machine direction sectional views of preferred embodiments of a forming fabric for use in connection with the present invention.
  • FIG. 9 is a diagram of a preferred system for performing a surface molding operation on a papermaker's fabric according to the present invention.
  • the invention relates to the manufacturing and application of papermaker's fabrics for the forming or dryer sections of a paper machine involving the step of surface molding the fabric between heated surfaces to obtain an optimally uniform paper contacting surface.
  • the fabrics manufactured according to the present invention incorporate a woven fabric, being either single or multilayer, e.g. monoplane, duplex, X- weave, triple weft or triplex.
  • the weave patterns and materials for the fabric will be selected according to criteria such as smoothness of the fabric surface against the sheet side and/or wear resistance against the rolls.
  • FIGS. 1-3 are design charts which illustrate preferred weave patterns for dryer fabrics which are particularly useful in connection with the present invention.
  • FIGS. 4-8 are machine direction sectional views of preferred forming fabrics for us in connection with the present invention wherein the machine direction yarns 19-20 are interwoven with cross machine direction yarns 21-24.
  • the preferred weaves include long machine direction yarn floats, i.e. machine direction yarns which travel over two or more successive cross machine direction yarns without diving back down into the fabric.
  • FIGS. 1-8 represent preferred, but not limiting weave patterns for dryer and forming fabrics. The fabrics depicted in FIGS.
  • 1-3 demonstrate preferred weaves on either eight or twelve shaft. Different weave patterns are used to match different permeability ranges for the dryer fabrics according to their application in the warm-up, the main evaporation zone, or the cooling zone of the dryer. Similarly, different weave patterns for the forming fabrics may be used according to predetermined criteria.
  • the conventional yarns utilized in dryer and forming fabrics of the present invention will vary, depending upon the desired properties of the fabric. Round shaped polyester-monofilaments with diameters of 0.3mm to 0.6mm represent the preferred material for the standard dryer fabric. Polyester and polyamide monofilaments with diameter of 0.08mm to 0.4mm represent the preferred material for standard forming fabrics.
  • the yarns may be round, elliptic, or flat, and may be multifilament yarns, monofilament yarns, twisted multifilament and/or monofilament yarns, spun yarns or any combination of the above. It is within the skill of those practicing in the relevant art to select a yarn type, depending on the purpose of the fabric, to utilize with the concepts of the present invention.
  • Yarns selected for use in each layer of the woven dryer or forming fabric of the present invention may be those commonly used in dryer fabric or forming fabric base fabric layers.
  • the yarns could be ryton, peek, cotton, wool, polypropylenes, polyesters, aramids or polyamides or combinations of these materials.
  • the dryer or forming fabrics of the present invention are subjected to a finishing process.
  • the fabric 27 is surface smoothened by molding between two rolls 25, 26 configured in a nip press. At least one, preferably both rolls 25,26 are heated by either a steam or oil source (not shown) . Also, in the preferred embodiment the rolls 25, 26 are swimming rolls which provide uniform pressure and heat transfer, giving the fabric a uniformly molded surface.
  • the fabric 27 is warmed on a heated roll (s) 25,26, passed through the nip press formed by the rolls, and cooled.
  • This process is iteratively performed while continuously checking caliper, permeability and imprints of the fabric surface to meet desired specifications for the fabric.
  • Different fabric designs require specific molding procedures which differ in temperature, loading, dwell time, passes, etc. to obtain optimum surface smoothness.
  • one pass of the fabric between two rolls configured in a nip press at a temperature of 150 °C, at a speed of 0.7 m/min and a loading of 20-150 kp/cm 2 represents a useful starting point. Nonetheless, the optimum parameters will always depend on the type of fabric used and the desired criteria for the final fabric. It has been found, however, that the temperature used for the process is typically between about 130 °C and about 240 °C.
  • the speed at which the fabric is passed through the rolls varies depending on the design between 0.3 and 10 m/min. Likewise, the specific loading used for the molding process varies between about 20 kp/cm 2 and 150 kp/cm 2 . Typically, the fabric must be passed through the rolls up to 10 times to meet the desired fabric specifications.
  • the preferred embodiment involves the use of two heated rolls 25,26 it is also possible to heat only one roll 25 or to use only one roll to press the fabric against a flat plate (not shown) with either or both of the surfaces being heated. Other variations are also possible as long as contact pressure and heat are applied to the fabric between two surfaces. Thus, the described process provides a molded fabric surface having optimum uniformity.
  • a fabric having a molded surface according to the present invention provides improved paper quality, less contamination, and improved drying rates due to improved sheet/roll contact in the case of dryer fabrics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)

Abstract

Cette invention concerne un processus de production d'un tissu destiné à la fabrication du papier, processus d'après lequel la surface du tissu entrant en contact avec le papier est moulée entre deux surfaces de préférence chauffées. Ces surfaces sont conçues de manière à appliquer une pression de contact sur le tissu afin de lisser de manière optimale la surface qui entrera en contact avec le papier, et d'égaliser les variations d'épaisseur dudit tissu. Les deux surfaces sont de préférence les surfaces de deux cylindres fonctionnant conjointement et formant une zone de pincement. Le tissu passe dans la zone de pincement et entre en contact avec les cylindres chauffés, ce qui permet de lisser et de mouler sa surface.
PCT/US1996/011086 1995-06-28 1996-06-27 Processus de production d'un tissu destine a la fabrication du papier WO1997001431A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU64810/96A AU6481096A (en) 1995-06-28 1996-06-27 Process of making papermakers' fabric

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49591995A 1995-06-28 1995-06-28
US08/495,919 1995-06-28

Publications (1)

Publication Number Publication Date
WO1997001431A1 true WO1997001431A1 (fr) 1997-01-16

Family

ID=23970511

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/011086 WO1997001431A1 (fr) 1995-06-28 1996-06-27 Processus de production d'un tissu destine a la fabrication du papier

Country Status (3)

Country Link
AU (1) AU6481096A (fr)
CA (1) CA2153846A1 (fr)
WO (1) WO1997001431A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004061204A1 (fr) 2002-12-30 2004-07-22 Albany International Corp. Toile industrielle calandree
WO2005111302A1 (fr) * 2004-05-19 2005-11-24 Wangner Gmbh & Co. Kg Procede permettant de former un tamis pour la partie humide d'une machine a papier
DE102007031610A1 (de) 2007-07-06 2009-01-08 Voith Patent Gmbh Verfahren zur Erzeugung einer Papiermaschinenbespannung
EP2182110A1 (fr) 2008-11-03 2010-05-05 Voith Patent GmbH Procédé de production d'un attelage de machine à papier
US7727360B2 (en) 2004-05-19 2010-06-01 Wangner Gmbh Forming sieve for the wet end section of a paper machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407737A (en) * 1991-11-19 1995-04-18 Thomas Josef Heimbach Gmbh & Co. Paper machine cover, in particular a drying filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407737A (en) * 1991-11-19 1995-04-18 Thomas Josef Heimbach Gmbh & Co. Paper machine cover, in particular a drying filter

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010159534A (ja) * 2002-12-30 2010-07-22 Albany Internatl Corp 平滑機にかけられた工業用加工布
CN102304834B (zh) * 2002-12-30 2015-03-11 阿尔巴尼国际公司 轧光的工业加工织物及其加工方法
JP2006512497A (ja) * 2002-12-30 2006-04-13 アルバニー　インターナショナル　コーポレイション 平滑機にかけられた工業用加工布
WO2004061204A1 (fr) 2002-12-30 2004-07-22 Albany International Corp. Toile industrielle calandree
KR101167835B1 (ko) 2002-12-30 2012-07-27 알바니 인터내셔널 코포레이션 캘린더된 산업 공정 직물
US7514030B2 (en) * 2002-12-30 2009-04-07 Albany International Corp. Fabric characteristics by flat calendering
JP2007538164A (ja) * 2004-05-19 2007-12-27 ハイク．ワグナー ジャーマニー ゲーエムベーハー 抄紙機の湿部に用いる抄紙網
US7727360B2 (en) 2004-05-19 2010-06-01 Wangner Gmbh Forming sieve for the wet end section of a paper machine
AU2005243513B2 (en) * 2004-05-19 2009-11-12 Huyck. Wangner Germany Gmbh Forming sieve for the wet end section of a paper machine
JP4650905B2 (ja) * 2004-05-19 2011-03-16 ハイク．ワグナー ジャーマニー ゲーエムベーハー 抄紙機の湿部に用いる抄紙網
KR101114959B1 (ko) * 2004-05-19 2012-03-06 후이크 반그너 저머니 게엠베하 초지기의 습단부용 성형 체
US8444825B2 (en) 2004-05-19 2013-05-21 Wangner Gmbh Forming sieve for the wet end section of a paper machine
WO2005111302A1 (fr) * 2004-05-19 2005-11-24 Wangner Gmbh & Co. Kg Procede permettant de former un tamis pour la partie humide d'une machine a papier
DE102007031610A1 (de) 2007-07-06 2009-01-08 Voith Patent Gmbh Verfahren zur Erzeugung einer Papiermaschinenbespannung
EP2182110A1 (fr) 2008-11-03 2010-05-05 Voith Patent GmbH Procédé de production d'un attelage de machine à papier

Also Published As

Publication number Publication date
AU6481096A (en) 1997-01-30
CA2153846A1 (fr) 1996-12-29

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