US20060075737A1 - Multi-layer fabric with Bi-nodal MD yarn - Google Patents

Multi-layer fabric with Bi-nodal MD yarn Download PDF

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Publication number
US20060075737A1
US20060075737A1 US11/242,536 US24253605A US2006075737A1 US 20060075737 A1 US20060075737 A1 US 20060075737A1 US 24253605 A US24253605 A US 24253605A US 2006075737 A1 US2006075737 A1 US 2006075737A1
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United States
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.)
Abandoned
Application number
US11/242,536
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English (en)
Inventor
Stewart 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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Assigned to VOITH PAPER PATENT GMBH reassignment VOITH PAPER PATENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAY, STEWART LISTER, PATEL, SANJAY
Publication of US20060075737A1 publication Critical patent/US20060075737A1/en
Abandoned legal-status Critical Current

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    • 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 yarns 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.
  • U.S. Pat. No. 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 yarns 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.
  • the present invention provides a fabric in which the effect that the knuckle has on the product transported thereon is reduced and which overcomes or alleviates the above described drawbacks.
  • a monofilament yarn having a bi-nodal cross section.
  • the bi-nodal monofilament yarn may include 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 yarns 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 including alone or in combination PA, PE, PET.
  • an industrial fabric including 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 including 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 fibers 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 fiber 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.
  • FIG. 1 is a diagrammatic representation of four different bi-nodal yarns, each constructed in accordance with the present invention
  • FIGS. 2 a and 2 b are sectional side views of a single layer fabric woven with non-symmetrical bi-nodal yarns
  • FIG. 3 a is a sectional side view of a known single layer fabric employing mono-filament MD yarns:
  • FIG. 3 b is a view similar to FIG. 3 a but comparing the same fabric constructed with bi-nodal yarns instead of known mono-filament MD yarns and illustrating the overall reduction in thickness for a fabric constructed in accordance with the present invention
  • FIG. 4 is a sectional side view of a double-layer fabric employing bi-nodal MD yarns
  • FIG. 5 is a sectional side view of a double-layer fabric comprising paper side and wear side CD bi-nodal yarns
  • FIG. 6 is a sectional side view illustrating a triple-weft structure employing MD bi-nodal yarns
  • FIG. 7 is a sectional side view illustrating a triple-weft structure employing CD bi nodal yarns
  • FIG. 8 is a sectional side view illustrating a triple-weft fabric employing MD bi-nodal yarns.
  • FIG. 9 is a sectional side view illustrating a triple-weft fabric employing CD bi-nodal yarns.
  • 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.
  • the two nodes 10 , 12 are integrally formed and are immediately adjacent to each other, whilst in the yarn of FIGS. 1 ( b ) and 1 ( c ) the two nodes 10 , 12 are spaced apart by an integrally formed connecting bridge 14 .
  • FIGS. 2 a and 2 b 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. 2 a ) or facing away (such as in FIG. 2 b ) from the yarns woven in the opposite direction.
  • the orientation of the yarns is selected depending on the required machine conditions.
  • bi-nodal yarns such as ( a ) and ( b ) could be used in such a single layer weave.
  • yarn of the cross section shown in 1 ( a ) is illustrated as a MD yarn in a single-layer structure 38 .
  • FIG. 3 a a conventional fabric is illustrated woven with the same pattern as that of FIG. 3 b but with conventional cylindrical yarns rather than bi-nodal yarns. Measurement of the thickness A of the conventional fabric ( FIG. 3 a ) when compared to the thickness B of the fabric constructed with bi-nodal yarns ( FIG.
  • the bi-nodal yarn from a single yarn it is possible to produce a yarn 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 wire mark, 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 utilized as a machine-direction yarn 16
  • the bi-nodal yarn is used as a cross-direction yarn 18 in a triple-weft structure 28 .
  • the bi-nodal yarn is utilized as a machine-direction yarn 16 at only the machine-side of a triple-weft structure 30
  • FIG. 9 illustrates a similar structure 32 with the bi-nodal yarn as the cross-direction yarn 18 .
US11/242,536 2004-10-05 2005-10-04 Multi-layer fabric with Bi-nodal MD yarn Abandoned US20060075737A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004048432.5 2004-10-05
DE102004048432A DE102004048432A1 (de) 2004-10-05 2004-10-05 Mehrlagiger Stoff mit Binodalem MD-Garn

Publications (1)

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US20060075737A1 true US20060075737A1 (en) 2006-04-13

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US11/242,536 Abandoned US20060075737A1 (en) 2004-10-05 2005-10-04 Multi-layer fabric with Bi-nodal MD yarn

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070246119A1 (en) * 2006-04-19 2007-10-25 Herman Jeffrey B Multi-layer woven creping fabric
US20080173369A1 (en) * 2007-01-19 2008-07-24 Fernandes Lippi A 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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE102015206028A1 (de) * 2015-04-02 2016-10-06 Voith Patent Gmbh Papiermaschinengewebe
EP3396036A1 (de) * 2017-04-24 2018-10-31 Max Schlatterer Gmbh&Co. Kg Band für die herstellung von zigaretten oder filtern von zigaretten

Citations (11)

* 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
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
US5366798A (en) * 1993-11-30 1994-11-22 Wangner Systems Corporation Multi-layered papermaking fabric having stabilized stacked weft yarn
US5378537A (en) * 1990-10-19 1995-01-03 Toray Industries, Inc. Polyester monofilament
US5597646A (en) * 1994-04-07 1997-01-28 Shakespeare Polymeric cable and fabric made therefrom
US5944062A (en) * 1995-12-19 1999-08-31 Cristini Forming Fabrics Gmbh Papermaking fabric with mutually contacting paired weft threads
US5991525A (en) * 1997-08-22 1999-11-23 Voyan Technology Method for real-time nonlinear system state estimation and control
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
US6332480B1 (en) * 1999-05-20 2001-12-25 Thomas Josef Heimbach Gesellschaft Mit Beschrankter Haftung & Co. Paper machine clothing having loop-forming longitudinal threads, at its ends

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI83673C (fi) * 1989-10-09 1991-08-12 Tamfelt Oy Ab Garn foer anvaendning vid framstaellning av en torkduk foer anvaendning i en pappersmaskin eller liknande.
JP4190876B2 (ja) * 2002-12-11 2008-12-03 シキボウ株式会社 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

Patent Citations (11)

* 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
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
US5378537A (en) * 1990-10-19 1995-01-03 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
US5597646A (en) * 1994-04-07 1997-01-28 Shakespeare Polymeric cable and fabric made therefrom
US5944062A (en) * 1995-12-19 1999-08-31 Cristini Forming Fabrics Gmbh Papermaking fabric with mutually contacting paired weft threads
US5991525A (en) * 1997-08-22 1999-11-23 Voyan Technology Method for real-time nonlinear system state estimation and control
US6332480B1 (en) * 1999-05-20 2001-12-25 Thomas Josef Heimbach Gesellschaft Mit Beschrankter Haftung & Co. Paper machine clothing having loop-forming longitudinal threads, at its ends
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070246119A1 (en) * 2006-04-19 2007-10-25 Herman Jeffrey B Multi-layer woven creping fabric
US7815768B2 (en) * 2006-04-19 2010-10-19 Albany International Corp. Multi-layer woven creping fabric
US20080173369A1 (en) * 2007-01-19 2008-07-24 Fernandes Lippi A Paper machine fabric with trapezoidal shaped filaments
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

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Publication number Publication date
EP1645683A1 (de) 2006-04-12
DE102004048432A1 (de) 2006-04-13

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Owner name: VOITH PAPER PATENT GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAY, STEWART LISTER;PATEL, SANJAY;REEL/FRAME:017397/0125;SIGNING DATES FROM 20051121 TO 20051207

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION