WO2005014926A1 - Paper machine fabric - Google Patents
Paper machine fabric Download PDFInfo
- Publication number
- WO2005014926A1 WO2005014926A1 PCT/EP2004/050775 EP2004050775W WO2005014926A1 WO 2005014926 A1 WO2005014926 A1 WO 2005014926A1 EP 2004050775 W EP2004050775 W EP 2004050775W WO 2005014926 A1 WO2005014926 A1 WO 2005014926A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paper
- weft
- fabric
- interchanging
- machine
- Prior art date
Links
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
Definitions
- the present invention relates to paper machine fabrics, and particularly but not exclusively to forming fabrics for use in the forming section of a paperma ing machine.
- Paper is conventionally manufactured by conveying a paper furnish, usually consisting of an initial slurry of cellulosic fibres, on a forming fabric or between two forming fabrics in a forming section, the nascent sheet then being passed through a pressing section and ultimately through a drying section of a papermaking machine.
- a paper furnish usually consisting of an initial slurry of cellulosic fibres
- the paper web is transferred from the press fabric to a Yankee dryer cylinder and then creped.
- Paper machine clothing is essentially employed to carry the paper web through these various stages of the papermaking machine.
- the fibrous furnish is wet-laid onto a moving forming wire and water is encouraged to drain from it by means of suction boxes and foils.
- the paper web is then transferred to a press fabric that conveys it through the pressing section, where it usually passes through a series of pressure nips formed by rotating cylindrical press rolls. Water is squeezed from the paper web and into the press fabric as the web and fabric pass through the nip together.
- the paper web is transferred either to a Yankee dryer, in the case of tissue paper manufacture, or to a set of dryer cylinders upon which, aided by the clamping action of the dryer fabric, the majority of the remaining water is evaporated.
- triple layer paper machine fabrics are known in the art. These generally comprise paper side and machine side warp and weft yam systems, which are bound together by binder yarns.
- EU 1,000,197A and EU 1,158,090A both disclose triple layer fabric in which the paper side weave is obtained by the interweaving of paper side machine direction (MD) or warp yarns with both individual, non-interchanging, paper side weft yarns and interchanging pairs of weft yarns which, in addition to forming part of the paper side weave, also act to bind the paper side and wear side fabrics together.
- MD paper side machine direction
- EU 1,158,090A both disclose triple layer fabric in which the paper side weave is obtained by the interweaving of paper side machine direction (MD) or warp yarns with both individual, non-interchanging, paper side weft yarns and interchanging pairs of weft yarns which, in addition to forming part of the paper side weave, also act to bind the paper side and wear side fabrics together.
- MD paper side machine direction
- EU 1, 000,197A and EU 1,158,090A have given good performance, in some respects, they have been found to be rather high in thickness such that water carried within the fabric void space may, near the end of the paper machine's sheet forming section, rewet the paper sheet resulting in decreased machine efficiency.
- EU 1,273,698A seeks to resolve this issue by incorporating thinner MD and CD (cross machine direction) yarns such that thinner fabrics containing less void space are provided. While this approach is helpful in resolving the so-called "sheet rewet" issue it creates a new problem in that the finer fabric has reduced CD bending stiffness and consequently the less stable fabric has a decreased ability to minimise sheet basis weight profiles.
- the present invention has been made from a consideration of these problems.
- a paper machine fabric having a paper side warp layer and a machine side warp layer
- the fabric comprising at least one set of paper side wefts interlaced with the paper side warps, at least one set of machine side wefts interlaced with the machine side warps and at least one pair of interchanging weft binders, the members of each weft binder pair together forming one continuous weft path on the paper side, all of said weft binder pairs interweaving with at least one paper side warp and at least one machine side warp, wherein at least one weft binder yarn member of at least one binder pair interlaces in an unlocked position with at least one warp yarn of the machine side of the fabric.
- An unlocked binder position under a warp yarn of the machine side or so called "wearside” fabric is one that is not enclosed on all sides by the interlacing of wearside fabric warp and weft yarns.
- a binding weft interlaces with a warp of the wearside fabric and that binding is contiguous to the interiacings of wearside fabric warp and weft on each side then the binder knuckle position is referred to as locked because the proximity of the contiguous machine direction - cross machine direction (MD-CD) interiacings maintain, or lock, the said binder knuckle in that position such that it is not free to move during the fabric manufacturing process.
- MD-CD contiguous machine direction - cross machine direction
- a regular sateen weave is herein defined as a weave containing all of the following features: - the functional surface of the fabric is dominated by weft floats; - fabric MD-CD interiacings are spaced at regular distances from each other; no two MD-CD interiacings are_contiguous; - there is only one warp interlacing with each weft in the weave pattern repeat; - all the floats ⁇ of all MD yarns are of equal length; - all the floats of all CD yarns are of equal length.
- Regular sateen weaves are utilised as opposed to irregular, modified, or extended sateen weaves due to the ease with which binder knuckles can be_distributed. Where sateen weaves are referred to in the remainder of the application it is to be understood that the weave in question belongs to the regular category.
- Preferred wear side fabric sateen weaves include 5,7,8, or 10 shaft sateens and preferred fabric total warp repeat size may include 20 or 40 shaft, 28 shaft, 16 or 32 shaft by way of non-limiting examples which allow for multiple wearside and paper side fabric weave repeats to thereby give more options regarding the placement of binder knuckles in the wearside fabric.
- all binder pairs comprise a binder yarn which interlaces with machine side warp in unlocked positions.
- half of the binder pairs comprise a binder yam which interlaces with the machine side warp in unlocked positions.
- the paper side weave pattern is selected from the group including 3,4,5,6 shaft straight or broken twill, or regular or irregular sateen or other modified weave giving a paper side weave where weft floats extend over two or more adjacent paper side warp yarns.
- the paper side weave pattern is plain weave.
- the machine side weave pattern is ideally selected from the group including 5,7,8 and 10 shaft sateen.
- the ratio of paper side to machine side weft yams, when counting a pair of interchanging wefts as a single paper side weft is selected from the group including 1 :1 , 2:1, 3:2, 4:3, 5:3.
- the ratio of paper side to machine side warp yarns is selected from the group including 1:1, 2:1 , 3:2, 4:3, 5:3.
- the interchanging weft binders may be positioned between and adjacent non-interchanging paper side wefts.
- interchanging weft binders are positioned in the paper side fabric such that all paper side weft yarns are separated by a pair of interchanging binder wefts.
- interchanging weft binder pairs may be positioned such that groups of two, three or more contiguous paper side weft yarns occur between each interchanging weft binder pair and the size of the contiguous paper side weft yarn groups are identical through the full fabric weave repeat.
- interchanging weft binders may be positioned such that the number of contiguous paper side weft yams occurring between successive interchanging weft binder pairs varies between at least three successive interchanging weft binder pairs in the fabric weave repeat.
- interchanging binder pairs and paper side weft yarns occur in equal numbers.
- interchanging weft binder pairs are less numerous than the paper side weft yarns.
- interchanging binder pairs are more numerous than the paper side weft yams.
- the invention is primarily aimed at relatively fine and thin fabric with paper side warp diameter in the range of 0.10 to 0J4 mm and with machine side warp diameter in the range of 0J5 to 0J9 mm.
- the benefits of the invention may be realised in fabric utilising thicker warp yarns of up to, for example, 0.25 mm on the paper side and up to 0.30 mm on the wear side.
- yarns are described as having diameter the invention can be realised with weft and/or warp yarns of non-circular cross-section such as ovate, square, or rectangular.
- the yam materials may be monofilament or multifilament and can be made from such materials as polyester and polyamide.
- the insertion order of the interchanging weft pair can be carried out such that the yams "reverse".
- Such reversing to re-distribute relative yarn knuckle positions in the paper side fabric are known in the art.
- Fig.1 is a series of wa ⁇ cross-sectional diagrams showing the consecutive weft paths of a fabric in accordance with the prior art EP 1 ,000,197A and EP 1 ,158,090A; and Fig. 2 is a series of warp cross sectional diagrams showing consecutive weft paths of a first fabric in accordance with the present invention.
- a fabric in accordance with the prior art has a twenty warp yarn repeat wherein warp yarns 1 ,3,5 19 are paper side warp yarns and warp yams 2,4,6....20 are wearside wa ⁇ yarns.
- the fabric of Fig. 1 also contains a forty weft repeat.
- the wefts comprise paper side or top wefts T1,T2,T3....T10, wear side or bottom wefts B1,B2,B3....B10 and interchanging binder weft pairs 40,42,44 58.
- interchanging weft yarns 11 and 12 are both binder yams in the pair 40 and interlace respectively with warp yarns 14 and 4 of the wear side fabric.
- Both binder yarns are positioned between wear side wefts B1 and B2.
- the interlacing of weft B1 with wa ⁇ 12 and weft B2 with warp 16 acts to "lock" binder 11 in position in the wearside fabric where it interlaces with wa ⁇ 14 such that the binder knuckle will fit snugly into this area and will not move during manufacture.
- the interlacing of weft B1 with warp 2 and weft B2 with warp 6 acts to lock binder 12 in position.
- the binding arrangement of interchanging binders 11 and 12 is representative of the other binder pairs, as can be seen in Fig 1 , so these are not described further.
- the interlacing of the respective wear side weft and warp yarns acts to form a five shaft wear side fabric with the characteristic weft path moving under four adjacent wa ⁇ s and over one warp arrangement, for example weft B1 moves over warp 2 and under adjacent warps 4,6,8,&10 to give a first five shaft repeat before moving over wa ⁇ 12 and under adjacent warps 14,16,18,20 to give a second five shaft repeat.
- All of the weft floats in the wearside fabric are of equal length, i.e. under 4 warp yarns, as indeed are the warp floats.
- the interiacings of warp yams with adjacent wefts in the wear side cloth are not contiguous but instead are separated by a regular number of wa ⁇ yarns, for example, weft B1 interlaces with warps 2 and 12 while the adjacent weft B2 interlaces with warps 6 and 16 such that the warps interlacing with adjacent wefts are separated by a single warp yarn i.e. the "stepping" sequence wearside fabric warp yam knuckles always moves by 2 warp yarns when moving from one contiguous wearside weft to another.
- the wear side structure is a five shaft sateen weave.
- the interlacing of the warp and wefts in "over-one and under-one" arrangement identifies a so-called plain weave structure.
- a triple layer forming fabric in accordance with the invention has a twenty warp yarn repeat wherein warp yarns 1 ,3,5 19 are paper side warp yams and warp yarns 2,4,6....20 are wearside warp yarns.
- the fabric of Fig. 2 also contains a forty weft repeat.
- the wefts comprise paper side or top wefts T1,T2,T3....T10, wear side or bottom wefts
- interchanging yarns 11 and 12 are both binder yarns in the pair 40A and interlace respectively with warp yarns 18 and 8 of the wear side fabric. Both binder yarns are positioned between wear side wefts B1 and B2.
- interlacing of weft B1 with the wearside warp12, and weft B2 with warp 16 does not act to "lock" binder 11 in position.
- interchanging binder 11 remains unlocked where it binds under warp 18 because, although contiguous with interlacing of B2 and wa ⁇ 16 on one side, there is no locking wearside weft-warp knuckle on the remaining side.
- interlacing of weft B1 with warps 2 and weft B2 with warp 6 does not act to lock binder 12 in position.
- the nature of the binding arrangement of interchanging binders 11 and 12 is representative of the other binder pairs, as can be seen in Fig 2, so these are not described further.
- the interiacings of the respective wear side wefts and wa ⁇ s act to form a five shaft wear side fabric with the characteristic weft under four adjacent warps and over one warp arrangement as has been described with reference to Fig. 1 and other features such that the wear side structure is a five shaft sateen weave.
- the interlacing of the warp and wefts in "over-one and under- one" arrangement identifies a so-called plain weave structure.
- Fabric according to Fig. 2 may allow some movement of the binder yarns such that they may ride at least partially on an adjacent wear side weft yam, as indicated by a thickness increase of 2.4% compared to fabric according to Fig. 1, such that bending resistance increases.
- binders are shown in "unlocked" positions. However, some benefits may be obtained from fabrics where only some binders are in the unlocked position in the wear side fabric and some binders are in a locked position on the fabric wear side.
- Fig. 2 the ratio of paper side to wear side weft yarns, when counting a binder pair as equal to a single paper side weft pair, is shown as 2:1.
- fabric in accordance with the invention can also be made with an
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- Paper (AREA)
- Woven Fabrics (AREA)
- Inorganic Insulating Materials (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04741558A EP1654417B1 (en) | 2003-07-24 | 2004-05-12 | Paper machine fabric |
US10/564,990 US7506670B2 (en) | 2003-07-24 | 2004-05-12 | Paper machine fabric |
AT04741558T ATE489500T1 (en) | 2003-07-24 | 2004-05-12 | PAPER MACHINE CLOTHING |
DE602004030256T DE602004030256D1 (en) | 2003-07-24 | 2004-05-12 | PAPER MACHINE COVERING |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0317248.3 | 2003-07-24 | ||
GBGB0317248.3A GB0317248D0 (en) | 2003-07-24 | 2003-07-24 | Fabric |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005014926A1 true WO2005014926A1 (en) | 2005-02-17 |
Family
ID=27772524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/050775 WO2005014926A1 (en) | 2003-07-24 | 2004-05-12 | Paper machine fabric |
Country Status (7)
Country | Link |
---|---|
US (1) | US7506670B2 (en) |
EP (1) | EP1654417B1 (en) |
AT (1) | ATE489500T1 (en) |
DE (1) | DE602004030256D1 (en) |
ES (1) | ES2354402T3 (en) |
GB (1) | GB0317248D0 (en) |
WO (1) | WO2005014926A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1586696A1 (en) * | 2004-04-16 | 2005-10-19 | Voith Fabrics Patent GmbH | Forming fabric |
EP1936024A1 (en) | 2006-12-22 | 2008-06-25 | Voith Patent GmbH | Forming fabric having binding weft yarns |
WO2008151876A1 (en) * | 2007-06-13 | 2008-12-18 | Voith Patent Gmbh | Paper machine |
WO2009040284A1 (en) * | 2007-09-21 | 2009-04-02 | Voith Patent Gmbh | Forming screen |
US20090283233A1 (en) * | 2006-12-08 | 2009-11-19 | Johann Boeck | Fabric belt for a machine for the production of web material, particularly paper or cardboard |
EP2314762A1 (en) | 2009-10-23 | 2011-04-27 | Heimbach GmbH & Co.KG | Woven paper maker fabric |
WO2012120191A1 (en) * | 2011-03-04 | 2012-09-13 | Metso Fabrics Inc. | Paper machine fabric |
DE102013106327A1 (en) | 2013-06-18 | 2014-12-18 | Andritz Technology And Asset Management Gmbh | papermaker |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007020071A1 (en) * | 2007-04-28 | 2008-10-30 | Voith Patent Gmbh | forming fabric |
US7717141B1 (en) * | 2009-02-06 | 2010-05-18 | Voith Patent Gmbh | Forming fabric with dual combination binder weft yarns |
US8196613B2 (en) * | 2009-02-25 | 2012-06-12 | Kevin John Ward | Multi-layer papermaker's forming fabric with paired MD binding yarns |
US7866350B1 (en) * | 2009-07-31 | 2011-01-11 | Voith Patent Gmbh | Forming fabric for the production of a fibrous web material |
DE102012207044A1 (en) * | 2012-04-27 | 2013-10-31 | Voith Patent Gmbh | forming fabric |
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-
2003
- 2003-07-24 GB GBGB0317248.3A patent/GB0317248D0/en not_active Ceased
-
2004
- 2004-05-12 WO PCT/EP2004/050775 patent/WO2005014926A1/en active Application Filing
- 2004-05-12 EP EP04741558A patent/EP1654417B1/en not_active Revoked
- 2004-05-12 DE DE602004030256T patent/DE602004030256D1/en not_active Expired - Lifetime
- 2004-05-12 AT AT04741558T patent/ATE489500T1/en active
- 2004-05-12 US US10/564,990 patent/US7506670B2/en active Active
- 2004-05-12 ES ES04741558T patent/ES2354402T3/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1158090A1 (en) * | 1997-08-01 | 2001-11-28 | Weavexx Corporation | Multi-layer forming fabric with stitching yarn pairs integrated into papermaking surface |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1586696A1 (en) * | 2004-04-16 | 2005-10-19 | Voith Fabrics Patent GmbH | Forming fabric |
US8652302B2 (en) | 2006-12-08 | 2014-02-18 | Voith Patent Gmbh | Fabric belt for a machine for the production of web material, particularly paper or cardboard |
US20090283233A1 (en) * | 2006-12-08 | 2009-11-19 | Johann Boeck | Fabric belt for a machine for the production of web material, particularly paper or cardboard |
US8252146B2 (en) * | 2006-12-08 | 2012-08-28 | Voith Patent Gmbh | Fabric belt for a machine for the production of web material, particularly paper or cardboard |
EP1936024A1 (en) | 2006-12-22 | 2008-06-25 | Voith Patent GmbH | Forming fabric having binding weft yarns |
US7743795B2 (en) | 2006-12-22 | 2010-06-29 | Voith Patent Gmbh | Forming fabric having binding weft yarns |
WO2008151876A1 (en) * | 2007-06-13 | 2008-12-18 | Voith Patent Gmbh | Paper machine |
WO2009040284A1 (en) * | 2007-09-21 | 2009-04-02 | Voith Patent Gmbh | Forming screen |
US8312900B2 (en) | 2007-09-21 | 2012-11-20 | Voith Patent Gmbh | Forming fabric |
EP2314762A1 (en) | 2009-10-23 | 2011-04-27 | Heimbach GmbH & Co.KG | Woven paper maker fabric |
WO2012120191A1 (en) * | 2011-03-04 | 2012-09-13 | Metso Fabrics Inc. | Paper machine fabric |
US9169599B2 (en) | 2011-03-04 | 2015-10-27 | Valmet Technologies Oy | Paper machine fabric |
DE102013106327A1 (en) | 2013-06-18 | 2014-12-18 | Andritz Technology And Asset Management Gmbh | papermaker |
WO2014202277A1 (en) | 2013-06-18 | 2014-12-24 | Andritz Technology And Asset Management Gmbh | Paper machine wire |
DE102013106327B4 (en) * | 2013-06-18 | 2015-01-08 | Andritz Technology And Asset Management Gmbh | papermaker |
US9528223B2 (en) | 2013-06-18 | 2016-12-27 | Andritz Technology & Asset Management Gmbh | Paper machine wire |
US10060076B2 (en) | 2013-06-18 | 2018-08-28 | Andritz Technology & Asset Management Gmbh | Paper machine screen |
Also Published As
Publication number | Publication date |
---|---|
ATE489500T1 (en) | 2010-12-15 |
DE602004030256D1 (en) | 2011-01-05 |
US7506670B2 (en) | 2009-03-24 |
EP1654417A1 (en) | 2006-05-10 |
GB0317248D0 (en) | 2003-08-27 |
EP1654417B1 (en) | 2010-11-24 |
US20060243339A1 (en) | 2006-11-02 |
ES2354402T3 (en) | 2011-03-14 |
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