EP1645683A1 - Faden mit zweilappigem Querschnitt und Papiermaschinenbespannung mit einem solchen Faden - Google Patents

Faden mit zweilappigem Querschnitt und Papiermaschinenbespannung mit einem solchen Faden Download PDF

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Publication number
EP1645683A1
EP1645683A1 EP05108476A EP05108476A EP1645683A1 EP 1645683 A1 EP1645683 A1 EP 1645683A1 EP 05108476 A EP05108476 A EP 05108476A EP 05108476 A EP05108476 A EP 05108476A EP 1645683 A1 EP1645683 A1 EP 1645683A1
Authority
EP
European Patent Office
Prior art keywords
nodal
yarns
yarn
fabric
layer
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Withdrawn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
EP05108476A
Other languages
English (en)
French (fr)
Inventor
Stewart Lister Hay
Sanjay Patel
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Voith Fabrics Patent GmbH
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 Voith Patent GmbH, Voith Fabrics Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1645683A1 publication Critical patent/EP1645683A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • 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
    • 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
    • D21F1/0036—Multi-layer screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts

Definitions

  • the present invention relates to industrial fabrics, and in particular, but not exclusively, to industrial fabrics such as paper maker's forming fabric.
  • forming fabric for use in paper making machines effects the web formation from the wet pulp and Therefore has a bearing on the quality of the paper produced.
  • forming fabrics are manufactured from fabrics' produced by weaving single, cylindrical monofilament strands of polymer material or metal wires. The knuckles formed at the cross-over points of such woven fabrics however, impart a mark onto the paper surface, causing a reduction in smoothness. Also, such fabrics have been shown to demonstrate a poor sheet release.
  • the fabric is formed using yams which have been formed by extruding, through a die, at least two individual filaments of polymer around a single axis, the swell of the material at the die fusing the filaments together.
  • the single axis forms a central axis which can be either a filament or a void.
  • US 4,705,601 (Chiu-Kai) describes a three layer forming fabric in which warp yarns having an ovate cross-section are incorporated into the lowermost, that is machine-side layer.
  • Ovate warp yarns have a greater tensile strength than the cylindrical yams used in The uppermost, that is pulp side layer, which allows comparatively a fewer number of such ovate yarns than cylindrical yarns to be used. This gives rise to a lower density in the lowermost layer, which enables a greater water extraction because it is possible to apply a greater suction pressure to the lowermost layer.
  • the ovate yarns however have the same vertical height as the cylindrical yarns, in order that the overall thickness of the fabric is not altered by using such yarns and in order that the surface of the uppermost layer is not changed.
  • a monofilament yarn having a bi-nodal cross section.
  • the binodal monofilament yarn may comprise two nodes, which are immediately adjacent, or the nodes may be separated by an integral linking bridge.
  • the bi-nodal yarns preferably have an aspect ratio of maximum width to maximum height ranging from 1,1 to 1,7, preferably from 1,3 to 1,6 and most preferably around 1,4.
  • the bi-nodal yams may be symmetrical or non-symmetrical in respect to their longitudinal axis.
  • the nodes may be flat at one side of the yarn.
  • the bi-nodal yarns preferably are made of a polymeric material.
  • the polymeric material preferably comprising alone or in combination PA, PE, PET.
  • an industrial fabric comprising at least some monofilament yarns having bi-nodal cross section.
  • the yarn has more structural integrity and is thereby more stable and less susceptible to separation when compared to a fused yarn, yarns joined during die swell or yarns simply laid side by side.
  • the increase in stability further allows the use of thinner (when viewed vertically) yarns, thereby further reducing fabric thickness whilst maintaining or decreasing void volume.
  • a bi-nodal yarn could replace a yarn of thicker diameter, but with the same mass in order to reduce the fabric thickness.
  • the void volume decreases.
  • a decrease in void volume results in less water carry and so therefore reduces the likelihood of re-wet. This is particularly beneficial for forming fabrics. In terms of production this leads to a dryer sheet, which would mean energy savings or an ability to speed the paper machine up.
  • the consequential reduction in knuckle height leads to improved paper smoothness and easier sheet release.
  • the channel between the nodes leads to improved water drainage.
  • the nodes also provide point contacts with the product conveyed on the fabric, resulting in much finer wire marks.
  • a fabric constructed with bi-nodal yarns also has improved stiffness which is beneficial on high speed gap formers with their enclosed forming zones. Stiffness equates to good sheet macro-formation due to reduction in streaks (density variations), caused by fabric with low stiffness not being able to withstand the hydraulic pressures.
  • the bi-nodal yarns are warp yarns and / or weft yarns of the fabric.
  • the fabric is a multi layer fabric comprising bi-nodal yarns on the paper side layer and / or wear side layer and / or on a middle layer of the fabric.
  • Bi-nodal yarns used on the paper side of the fabric lead to a reduction of knuckle height resulting in a smoother paper contacting surface with less tendency of wire marking.
  • Bi-nodal yarns used on the wear side of the fabric preferably but not exclusively as CD yarns has the advantage that they enhance the scraping action of fibres from elements and reduce friction/drive load by trapping water, leading to an increase in the longevity of the fabric.
  • Bi-nodal yarns when added to the middle or top layers of for example a triple-weft fabric can provide good stiffness, giving additional fibre support in the top layer.
  • the bi-nodal yarns provided on the paper side layer having the same aspect ratio like the bi-nodal yarns provided on the wear side layer.
  • a fine and smooth paper side and a wear resistant wear side preferably at least some bi-nodal yarns provided on the paper side layer having a smaller total cross sectional area than the bi-nodal yarns provided on the wear side layer.
  • a method of making an industrial fabric comprising the step of extrusion of a single filament yarn through a die to produce a monofilament bi-nodal yarn.
  • the bi-nodal yarns of the present invention are prepared by extrusion a single filament to form a bi-nodal yarn. Examples of the shapes of such bi-nodal yarns are shown in Fig. 1, in which yarns (a) and (b) are symmetrical about its X-axis and yarns (c) and (d) are non-symmetrical about their X-axis.
  • Figs 1 (a) and 1 (d) the two nodes 10, 12 are integrally formed and are immediately adjacent to each other, whilst in the yarn of Figs. I (b) and I (c) the two nodes 10,12 are spaced apart by an integrally formed connecting bridge 14.
  • Figs. 2a and 2b illustrate the use of the non-symmetrical bi-nodal yarns (c) and (d) in a single layer fabric 34 and 36.
  • the yarns can lie in either the MD or CD directions or both the MD and CD directions.
  • the yarns can be woven in position either way round with their flatter side facing (such as in Fig. 2a) or facing away (such as in Fig. 2b) from the yarns woven in the opposite direction.
  • the orientation of the yarns is selected depending on the required machine conditions.
  • the bi-nodal yarn from a single yarn it is possible to produce a yam of increased structural integrity when compared to a paired, joined or 'fused yarn.
  • the increased stability allows the use of thinner yarns to reduce fabric thickness whilst maintaining or decreasing void volume.
  • a bi-nodal yarn could replace a cylindrical yarn of thicker diameter, but having the same mass to reduce the fabric thickness. As the mass remains the same, the void volume decreases. A decrease in void volume results in less water carry and so therefore reduces the likelihood of re-wet. This is particularly beneficial in forming fabrics leading to the production of a dryer sheet, which would mean energy savings or an ability to speed the paper machine up.
  • a channel for water drainage is provided between the two nodes, unlike a flat yarn, which has no ability to drain water.
  • the nodes of the bi-nodal yarn also only present a point contact producing thereby a much finer wiremark, when compared to the broader contact provided by a flat yarn.
  • Fig. 4 illustrates the use of the bi-nodal yarns as a machine-direction yarn 16 in a double-layer fabric 22.
  • Fig. 5 illustrates the use of bi-nodal yarns 16, 18 in both the machine and cross direction of a fabric 24.
  • Reference numeral 18 representing bi-nodal cross-section yarns and numeral 20 binder yarns.
  • Fig. 6 illustrates a triple-weft structure 26 where the bi-nodal yarn is utilised as a machine-direction yarn 16, whilst in the embodiment of Fig. 7 the bi-nodal yarn is used as a cross-direction yarn 18 in a triple-weft structure 28.
  • the bi-nodal yam is utilised as a machine- direction yarn 16 at only the machine-side of a triple-weft structure 30 whilst Fig. 9 illustrates a similar structure 32 with the bi-nodal yarn as the cross- direction yarn 18.
EP05108476A 2004-10-05 2005-09-15 Faden mit zweilappigem Querschnitt und Papiermaschinenbespannung mit einem solchen Faden Withdrawn EP1645683A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004048432A DE102004048432A1 (de) 2004-10-05 2004-10-05 Mehrlagiger Stoff mit Binodalem MD-Garn

Publications (1)

Publication Number Publication Date
EP1645683A1 true EP1645683A1 (de) 2006-04-12

Family

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EP05108476A Withdrawn EP1645683A1 (de) 2004-10-05 2005-09-15 Faden mit zweilappigem Querschnitt und Papiermaschinenbespannung mit einem solchen Faden

Country Status (3)

Country Link
US (1) US20060075737A1 (de)
EP (1) EP1645683A1 (de)
DE (1) DE102004048432A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007124030A2 (en) * 2006-04-19 2007-11-01 Albany International Corp. Multi-layer woven creping fabric
DE102007024509A1 (de) 2007-05-25 2008-12-04 Voith Patent Gmbh Pressfilz mit profilierten Fäden
RU2466234C2 (ru) * 2006-04-19 2012-11-10 Олбани Интернешнл Корп. Многослойная текстильная крепирующая ткань
EP3396036A1 (de) * 2017-04-24 2018-10-31 Max Schlatterer Gmbh&Co. Kg Band für die herstellung von zigaretten oder filtern von zigaretten

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7721769B2 (en) * 2007-01-19 2010-05-25 Voith Patent Gmbh Paper machine fabric with trapezoidal shaped filaments
CN102776652A (zh) * 2012-07-24 2012-11-14 常熟市建华织造有限责任公司 一种柔软防皱面料
DE102015206028A1 (de) * 2015-04-02 2016-10-06 Voith Patent Gmbh Papiermaschinengewebe

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481079A (en) * 1981-06-12 1984-11-06 Scapa Inc. Spiral fabric papermakers felt formed from non-circular cross section yarns
US4633596A (en) * 1981-09-01 1987-01-06 Albany International Corp. Paper machine clothing
DE4031608A1 (de) * 1989-10-09 1991-04-11 Tamfelt Oy Ab Faden
EP0506983A1 (de) * 1990-10-19 1992-10-07 Toray Industries, Inc. Polyester monofilament
US5366798A (en) * 1993-11-30 1994-11-22 Wangner Systems Corporation Multi-layered papermaking fabric having stabilized stacked weft yarn
EP1054097A1 (de) * 1999-05-20 2000-11-22 Thomas Josef Heimbach GmbH & Co. Papiermaschinenbespannung, insbesondere als Trockensieb
US6179013B1 (en) * 1999-10-21 2001-01-30 Weavexx Corporation Low caliper multi-layer forming fabrics with machine side cross machine direction yarns having a flattened cross section
JP2004190177A (ja) * 2002-12-11 2004-07-08 Shikibo Ltd 製紙機械用ドライヤーカンバス
WO2004079089A1 (en) * 2003-03-03 2004-09-16 Voith Fabrics Patent Gmbh A composite forming fabric

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636426A (en) * 1985-01-04 1987-01-13 Huyck Corporation Papermaker's fabric with yarns having multiple parallel monofilament strands
US4705601A (en) * 1987-02-05 1987-11-10 B.I. Industries, Inc. Multi-ply paper forming fabric with ovate warp yarns in lowermost ply
US5591525A (en) * 1994-04-07 1997-01-07 Shakespeare Polymeric cable
AT403486B (de) * 1995-12-19 1998-02-25 Hutter & Schrantz Papiermaschi Technisches gewebe für den einsatz in papiermaschinen
US5991525A (en) * 1997-08-22 1999-11-23 Voyan Technology Method for real-time nonlinear system state estimation and control

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481079A (en) * 1981-06-12 1984-11-06 Scapa Inc. Spiral fabric papermakers felt formed from non-circular cross section yarns
US4633596A (en) * 1981-09-01 1987-01-06 Albany International Corp. Paper machine clothing
DE4031608A1 (de) * 1989-10-09 1991-04-11 Tamfelt Oy Ab Faden
EP0506983A1 (de) * 1990-10-19 1992-10-07 Toray Industries, Inc. Polyester monofilament
US5366798A (en) * 1993-11-30 1994-11-22 Wangner Systems Corporation Multi-layered papermaking fabric having stabilized stacked weft yarn
EP1054097A1 (de) * 1999-05-20 2000-11-22 Thomas Josef Heimbach GmbH & Co. Papiermaschinenbespannung, insbesondere als Trockensieb
US6179013B1 (en) * 1999-10-21 2001-01-30 Weavexx Corporation Low caliper multi-layer forming fabrics with machine side cross machine direction yarns having a flattened cross section
JP2004190177A (ja) * 2002-12-11 2004-07-08 Shikibo Ltd 製紙機械用ドライヤーカンバス
WO2004079089A1 (en) * 2003-03-03 2004-09-16 Voith Fabrics Patent Gmbh A composite forming fabric

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007124030A2 (en) * 2006-04-19 2007-11-01 Albany International Corp. Multi-layer woven creping fabric
WO2007124030A3 (en) * 2006-04-19 2007-12-21 Albany Int Corp Multi-layer woven creping fabric
US7815768B2 (en) 2006-04-19 2010-10-19 Albany International Corp. Multi-layer woven creping fabric
RU2466234C2 (ru) * 2006-04-19 2012-11-10 Олбани Интернешнл Корп. Многослойная текстильная крепирующая ткань
DE102007024509A1 (de) 2007-05-25 2008-12-04 Voith Patent Gmbh Pressfilz mit profilierten Fäden
EP3396036A1 (de) * 2017-04-24 2018-10-31 Max Schlatterer Gmbh&Co. Kg Band für die herstellung von zigaretten oder filtern von zigaretten

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Publication number Publication date
DE102004048432A1 (de) 2006-04-13
US20060075737A1 (en) 2006-04-13

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