EP1774090A1 - Warp-runner triple layer fabric with paired intrinsic warp binders - Google Patents
Warp-runner triple layer fabric with paired intrinsic warp bindersInfo
- Publication number
- EP1774090A1 EP1774090A1 EP05776476A EP05776476A EP1774090A1 EP 1774090 A1 EP1774090 A1 EP 1774090A1 EP 05776476 A EP05776476 A EP 05776476A EP 05776476 A EP05776476 A EP 05776476A EP 1774090 A1 EP1774090 A1 EP 1774090A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- yarns
- layer
- warp
- papermaker
- 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
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 92
- 239000011230 binding agent Substances 0.000 title abstract description 9
- 238000005299 abrasion Methods 0.000 claims abstract description 4
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 3
- 235000004879 dioscorea Nutrition 0.000 claims 2
- 229920000728 polyester Polymers 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000000835 fiber Substances 0.000 description 7
- 239000011800 void material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- 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
- D21F1/0045—Triple layer fabrics
-
- 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
Definitions
- the present invention relates to the papermaking arts. More specifically, the present invention relates to forming fabrics for a forming section of a paper machine.
- a cellulosic fibrous web is formed by depositing a fibrous slurry, that is, an aqueous dispersion of cellulose fibers, onto a moving forming fabric in a forming section of a paper machine. A large amount of water is drained from the slurry through the forming fabric, leaving the cellulosic fibrous web on the surface of the forming fabric.
- a fibrous slurry that is, an aqueous dispersion of cellulose fibers
- the newly formed cellulosic fibrous web proceeds from the forming section to a press section, which includes a series of press nips.
- the cellulosic fibrous web passes through the press nips supported by a press fabric, or, as is often the case, between two such press fabrics.
- the press nips the cellulosic fibrous web is subjected to compressive forces which squeeze water therefrom, and which adhere the cellulosic fibers in the web to one another to turn the cellulosic fibrous web into a paper sheet.
- the water is accepted by the press fabric or fabrics and, ideally, does not return to the paper sheet.
- the paper sheet finally proceeds to a dryer section, which includes at least one series of rotatable dryer drums or cylinders, which are internally heated by steam.
- the newly formed paper sheet is directed in a serpentine path sequentially around each in the series of drums by a dryer fabric, which holds the paper sheet closely against the surfaces of the drums.
- the heated drums reduce the water content of the paper sheet to a desirable level through evaporation.
- the forming, press and dryer fabrics all take the form of endless loops on the paper machine and function in the manner of conveyors.
- paper manufacture is a continuous process which proceeds at considerable speeds. That is to say, me fibrous slurry is continuously deposited onto the forming fabric in the forming section, while a newly manufactured paper sheet is continuously wound onto rolls after it exits from the dryer section.
- Press fabrics also participate in the finishing of the surface of the paper sheet. That is, press fabrics are designed to have smooth surfaces and uniformly resilient structures, so that, in the course of passing through the press nips, a smooth, mark-free surface is imparted to the paper.
- Press fabrics accept the large quantities of water extracted from the wet paper in the press nip. In order to fill this function, there literally must be space, commonly referred to as void volume, within the press fabric for the water to go, and the fabric must have adequate permeability to water for its entire useful life. Finally, press fabrics must be able to prevent the water accepted from the wet paper from returning to and rewetting the paper upon exit from the press nip.
- Woven fabrics take many different forms. For example, they may be woven endless, or flat woven and subsequently rendered into endless form with a seam.
- the present invention relates specifically to the forming fabrics used in the forming section.
- Forming fabrics play a critical role during the paper manufacturing process.
- One of its functions, as implied above, is to form and convey the paper product being manufactured to the press section.
- forming fabrics also need to address water removal and sheet formation issues. That is, forming fabrics are designed to allow water to pass through (i.e. control the rate of drainage) while at the same time prevent fiber and other solids from passing through with the water. If drainage occurs too rapidly or too slowly, the sheet quality and machine efficiency suffers. To control drainage, the space within the forming fabric for the water to drain, commonly referred to as void volume, must be properly designed.
- Contemporary forming fabrics are produced in a wide variety of styles designed to meet the requirements of the paper machines on which they are installed for the paper grades being manufactured. Generally, they comprise a base fabric woven from monofilament and may be single-layered or multi-layered. The yarns are typically extruded from any one of several synthetic polymeric resins, such as polyamide and polyester resins, used for this purpose by those of ordinary skill in the paper machine clothing arts.
- the design of forming fabrics additionally involves a compromise between the desired fiber support and fabric stability.
- a fine mesh fabric may provide the desired paper surface properties, but such design may lack the desired stability resulting in a short fabric life.
- coarse mesh fabrics provide stability and long life at the expense of fiber support.
- multi ⁇ layer fabrics were developed. For example, in double and triple layer fabrics, the forming side is designed for support while the wear side is designed for stability, as well as drainage.
- triple layer designs allow the forming surface of the fabric to be woven independently of the wear surface. Because of this independence, triple layer designs can provide a high level of fiber support and an optimum internal void volume. Thus, triple layers may provide significant improvement in drainage over single and double layer designs.
- triple layer fabrics consist of two fabrics, the forming layer and the wear layer, held together by binding yarns. The binding is extremely important to the overall integrity of the fabric.
- One problem with triple layer fabrics has been relative slippage between the two layers which breaks down the fabric over time.
- the binding yarns can disrupt the structure of the forming layer resulting in marking of the paper.
- the present invention describes a triple-layer forming fabric having paired intrinsic binders and wear side warp runners. The present invention provides a solution to the problem of abrasive wear on the machine side of the fabric while providing good fiber support with a relatively low caliper and an appropriate void volume.
- the present invention relates to a forming fabric for use in the forming section of a paper machine, although it may find application in the pressing and/or drying sections of the paper machine.
- the present fabric is a triple layer forming fabric having a first layer formed of a first system of paired machine-direction (MD) warp yarns interwoven with a first system of cross machine-direction (CD) weft yarns and a second layer formed of a second system of MD warp yarns interwoven with a second system of CD weft yarns.
- the paired MD warp yarns are intrinsic to the first layer and are interwoven with the second system of CD weft yarns to bind the second layer to the first layer.
- the second system of MD warp yarns forms long floats, or warp-runners, on an external surface of the second layer.
- the first layer is a forming side of the fabric and the second layer is a wear side of the fabric. In this manner, a triple layer forming fabric with paired intrinsic binders and warp-runners may be produced with improved wear side abrasion resistance.
- paired MD warps are not intrinsic to the second layer.
- the second layer paired warps help to protect the binding point(s) between the layers. Because each wear weft passes under at least two consecutive wear warps, the wear warps can be wrapped more forcefully to create a greater plane difference than comparable prior art fabrics.
- the fabric may have various weft ratios of the first system of CD weft yarns to the second system of CD weft yarns.
- the long floats may be of different lengths.
- the fabric may be flat woven or in endless form. Some of the yarns may have different diameters and/or shapes.
- Figure 1 shows a cross-sectional view of a preferred embodiment of a warp-bound warp-runner triple layer fabric with paired intrinsic binders and paired warp runners in accordance with the teachings of the present invention.
- a preferred embodiment of the present invention describes a triple- layer fabric suitable for use in the forming section of a papermaking machine.
- the present fabric is comprised of atop, or forming, layer and a bottom, or wear, layer.
- Each layer is formed of interwoven machine direction (MD), or warp, yarns and cross-machine direction (CD), or weft yarns.
- MD machine direction
- CD cross-machine direction
- the fabric is made up of forming wefts and wear wefts with forming warps and wear warps.
- the forming layer and wear layer are bound together by the forming warps which are interwoven with both the forming wefts and wear wefts.
- These forming warps are paired together and are intrinsic to at least the forming layer, and possibly both layers. Thus, they are referred to as paired intrinsic binders.
- the term intrinsic is defined to mean the yarns are woven so as to provide fiber support to the top layer, as opposed to simply binding one layer to another.
- the warps in the wear layer of the fabric are woven so as to produce long floats on the outer wear side surface of the triple layer fabric.
- a "long" float means the warp passes under at least two wefts on the wear side surface. Accordingly, such long floats may pass under or beneath 2, 3, 4, or more yarns on the wear side.
- These long floats are alternatively referred to as warp runners.
- the floats are the primary contacts between the fabric and the papermaking machine.
- Various warps or combinations of warps can also be used to form the floats; e.g.
- wear side warps, or forming side warps, or both the wear side warps and the forming warps can be used to form warp runners. Further, each of the wear side warps and/or forming side warps or only some of them can be used to form warp runners.
- the length of the floats can also be varied. Because these floats run in the MD and provide a relatively smooth fabric surface, they reduce the abrasive wear on the fabric caused by contact with stationary elements of the papermaking machine. In other words, the present fabric's warp runners provide improved abrasion resistance. In addition, the warp runners help reduce the load on papermaking machines running this type of fabric.
- Figure 1 shows a cross-sectional view of the preferred embodiment of a warp-runner triple layer fabric with paired intrinsic warp binders in - accordance with the teachings of the present invention. More specifically, Figure 1 shows the warp contours in the forming and wear layers for a pair of intrinsic binder yarns WIl and W 12. Paired warps WIl and Wl 2 are woven intrinsic to the forming layer and cross to bind the wear layer. Warp Wl 1 binds the wear layer at weft yarn 23 and warp W12 binds the wear layer at weft yarn 8. The fabric has a weft ratio of 2: 1 as evidenced by twice as many weft yarns in the forming layer (e.g.
- Wear warp Wl and wear warp W2 weave the wear layer and form paired warps with long floats from weft yarns 2 to 11 and 17 to 26. Although a float length of 4 is illustrated in Figure 1, other float lengths greater than 2 can be utilized. Further, the wear warps may be paired warps and/or non-paired warps.
- Additional advantages of the present fabric include a relatively high weaving efficiency, reduced dimples on the forming surface (primarily due to the use of binding warps rather than wefts), a relatively low caliper and an appropriate void volume.
- the present fabric is also relatively easy to clean, has a relatively long life expectancy, and a relatively low drive load for papermaking machines running this fabric due to the long wear side floats contacting the machine elements in a perpendicular direction.
- Other aspects of the present invention include that the pattern may have forming to wear-side weft ratios of 1:1, 2:1, 3:1, 3:2, or any other weft ratio.
- the present fabric may also incorporate different diameter or shaped yarns. For example, the forming side yarns may be of a smaller diameter than the wear side yarns.
- warp and/or weft yarns may be stacked or not stacked.
- the forming side wefts may be stacked or not stacked over the wear side wefts. Note, these examples are simply representative examples of the invention and are not meant to limit the invention.
- the fabric according to the present invention preferably comprises only monofilament yarns.
- the CD and MD yarns may have a circular cross- sectional shape with one or more different diameters. Additionally, the CD yarns and MD yarns in the forming side and wear side may have different diameters. It is preferable for the forming side CD and MD yarns to have smaller diameters than the wear side CD and MD yarns.
- one or more of the yarns may have other cross-sectional shapes such as a rectangular cross- sectional shape or a non-round cross-sectional shape.
- the yarns may be monofilament yarns of circular cross section of any of the synthetic polymeric resins used in the production of such yarns for paper machine clothing. Polyester and polyamide are but two examples of such materials.
Landscapes
- Paper (AREA)
- Woven Fabrics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US59888704P | 2004-08-04 | 2004-08-04 | |
PCT/US2005/026780 WO2006020414A1 (en) | 2004-08-04 | 2005-07-28 | Warp-runner triple layer fabric with paired intrinsic warp binders |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1774090A1 true EP1774090A1 (en) | 2007-04-18 |
EP1774090B1 EP1774090B1 (en) | 2014-06-04 |
Family
ID=35229674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05776476.3A Active EP1774090B1 (en) | 2004-08-04 | 2005-07-28 | Warp-runner triple layer fabric with paired intrinsic warp binders |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP1774090B1 (en) |
JP (1) | JP4998951B2 (en) |
KR (1) | KR101184894B1 (en) |
CN (2) | CN101001989A (en) |
AU (1) | AU2005274086A1 (en) |
BR (1) | BRPI0513648B1 (en) |
CA (1) | CA2575829C (en) |
MX (1) | MX2007001388A (en) |
NO (1) | NO20071216L (en) |
RU (1) | RU2379400C2 (en) |
TW (1) | TWI367824B (en) |
WO (1) | WO2006020414A1 (en) |
ZA (1) | ZA200701008B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008068317A1 (en) | 2006-12-08 | 2008-06-12 | Voith Patent Gmbh | Cloth tape for a machine for the production of sheet material, in particular paper or cardboard |
DE102007046113A1 (en) | 2007-09-21 | 2009-04-02 | Voith Patent Gmbh | forming fabric |
IT1391374B1 (en) | 2008-10-08 | 2011-12-13 | Feltri Marone S P A | TRIPLE CARD MANUFACTURING FABRIC |
EP2230352B1 (en) | 2009-03-20 | 2012-10-03 | Heimbach GmbH & Co.KG | Woven fabric band for circulation in a machine |
US7866350B1 (en) | 2009-07-31 | 2011-01-11 | Voith Patent Gmbh | Forming fabric for the production of a fibrous web material |
CN101660237B (en) * | 2009-09-14 | 2011-11-09 | 孔伟文 | Three-layer fabric and tatting technique thereof |
DE102010017055A1 (en) * | 2010-05-21 | 2011-11-24 | Andritz Technology And Asset Management Gmbh | forming wire |
ES2563193T3 (en) | 2014-01-28 | 2016-03-11 | Heimbach Gmbh & Co. Kg | Paper machine fabric |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62141192A (en) * | 1985-12-10 | 1987-06-24 | 日本フイルコン株式会社 | Papermaking double fabric |
CA1277209C (en) * | 1986-11-28 | 1990-12-04 | Dale B. Johnson | Composite forming fabric |
SE460125B (en) * | 1987-03-24 | 1989-09-11 | Nordiskafilt Ab | MULTIPLE STORED DRAINAGE BAND FOR PAPER SHEET STRENGTH |
JPH06264387A (en) * | 1993-03-04 | 1994-09-20 | Nippon Filcon Co Ltd | Woven fabric for papermaking improved in abrasion resistance of selvedge part |
JP3444373B2 (en) * | 1994-03-18 | 2003-09-08 | 日本フイルコン株式会社 | Warp double weft double papermaking fabric with auxiliary wefts arranged on the papermaking side fabric |
GB2351505A (en) * | 1999-06-29 | 2001-01-03 | Jwi Ltd | Two-layer woven fabric for papermaking machines |
JP4584402B2 (en) * | 2000-03-03 | 2010-11-24 | 日本フイルコン株式会社 | 2-layer fabric for papermaking |
US6379506B1 (en) * | 2000-10-05 | 2002-04-30 | Weavexx Corporation | Auto-joinable triple layer papermaker's forming fabric |
US6834684B2 (en) * | 2002-10-24 | 2004-12-28 | Albany International Corp. | Paired warp triple layer forming fabrics with optimum sheet building characteristics |
US7048012B2 (en) * | 2002-10-24 | 2006-05-23 | Albany International Corp. | Paired warp triple layer forming fabrics with optimum sheet building characteristics |
US6854488B2 (en) * | 2002-12-24 | 2005-02-15 | Voith Fabrics Heidenheim Gmbh & Co., Kg | Fabrics with paired, interchanging yarns having discontinuous weave pattern |
-
2005
- 2005-07-28 WO PCT/US2005/026780 patent/WO2006020414A1/en active Application Filing
- 2005-07-28 MX MX2007001388A patent/MX2007001388A/en active IP Right Grant
- 2005-07-28 CN CNA2005800264121A patent/CN101001989A/en active Pending
- 2005-07-28 JP JP2007524852A patent/JP4998951B2/en active Active
- 2005-07-28 KR KR1020077005205A patent/KR101184894B1/en active IP Right Grant
- 2005-07-28 CA CA002575829A patent/CA2575829C/en active Active
- 2005-07-28 BR BRPI0513648A patent/BRPI0513648B1/en active IP Right Grant
- 2005-07-28 AU AU2005274086A patent/AU2005274086A1/en not_active Abandoned
- 2005-07-28 RU RU2007104770/12A patent/RU2379400C2/en active
- 2005-07-28 ZA ZA200701008A patent/ZA200701008B/en unknown
- 2005-07-28 EP EP05776476.3A patent/EP1774090B1/en active Active
- 2005-07-28 CN CN201210311605.3A patent/CN102852023B/en active Active
- 2005-08-03 TW TW094126362A patent/TWI367824B/en active
-
2007
- 2007-03-05 NO NO20071216A patent/NO20071216L/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006020414A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2007104770A (en) | 2008-09-10 |
KR101184894B1 (en) | 2012-09-21 |
CA2575829A1 (en) | 2006-02-23 |
ZA200701008B (en) | 2008-08-27 |
CN102852023A (en) | 2013-01-02 |
RU2379400C2 (en) | 2010-01-20 |
AU2005274086A1 (en) | 2006-02-23 |
TWI367824B (en) | 2012-07-11 |
EP1774090B1 (en) | 2014-06-04 |
TW200615136A (en) | 2006-05-16 |
BRPI0513648B1 (en) | 2016-03-22 |
JP2008509293A (en) | 2008-03-27 |
CA2575829C (en) | 2009-05-05 |
CN101001989A (en) | 2007-07-18 |
BRPI0513648A (en) | 2008-05-13 |
KR20070045313A (en) | 2007-05-02 |
NO20071216L (en) | 2007-03-05 |
JP4998951B2 (en) | 2012-08-15 |
WO2006020414A1 (en) | 2006-02-23 |
MX2007001388A (en) | 2007-04-19 |
CN102852023B (en) | 2015-03-25 |
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CA2544791C (en) | Stable forming fabric with high fiber support | |
AU2003297086B2 (en) | Double cross parallel binder fabric | |
US7124781B2 (en) | Multiple contour binders in triple layer fabrics | |
US6902652B2 (en) | Multi-layer papermaker's fabrics with packing yarns | |
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CA2575829C (en) | Warp-runner triple layer fabric with paired intrinsic warp binders | |
US7198067B2 (en) | Warp-runner triple layer fabric with paired intrinsic warp binders |
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