WO2017093614A1 - Paper machine fabric - Google Patents
Paper machine fabric Download PDFInfo
- Publication number
- WO2017093614A1 WO2017093614A1 PCT/FI2016/050851 FI2016050851W WO2017093614A1 WO 2017093614 A1 WO2017093614 A1 WO 2017093614A1 FI 2016050851 W FI2016050851 W FI 2016050851W WO 2017093614 A1 WO2017093614 A1 WO 2017093614A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- warps
- wefts
- binding
- adjusted
- paper 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
- D21F1/10—Wire-cloths
- D21F1/105—Multi-layer wire-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
- 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 invention relates to a paper machine fabric consisting of two layers, a paper-side layer and a wear-side layer; the paper-side layer consists of the top warps and at least the binding top wefts, which have been adjusted to form a part of the paper-side surface, and the wear-side layer consists of the bottom warps and bottom wefts, where the binding top wefts have been adjusted to bind the paper-side layer and the wear-side layer together.
- the formation of the paper web starts at the wire section, where most of the water is removed.
- the pulp When spread on the wet wire, the pulp consists of approximately 99% water, with the remainder consisting of fibres and possible fillers and additives.
- the quality of the paper is largely determined at the wire section of the paper machine.
- the small-scale variations in the basis weight of the paper i.e. the formation, the distribution of fines and fillers and the orientation of fibres, are mainly determined at the wire section.
- Two-layer paper machine fabric structures are widely known in the field. These structures have one warp system and two weft systems.
- the technology of a double-layer paper machine fabric has been described in the US patent publication 4 041 989, for instance.
- the wires are thin, but also susceptible to breaking. As the dewater- ing elements of the paper machine wear down the fabric on the wear side, all yarns in the warp direction also wear down, and the risk of the fabric breaking increases. In addition, the wear on the yarns makes the fabric unstable, which degrades the paper profiles.
- SSB structures are also known in the field.
- SSB is an acronym for sheet support binding. These structures have two warp systems and three weft systems.
- One of the weft systems consists of binding yarn pairs that bind the paper- side and wear-side layers together and also participate in forming the paper-side layer.
- the art of SSB structures is described in the US patent publications 4 501 303, 5 967 195 and 5 826 627, for instance. Due to the two warp systems, SSB structures achieve greater wear resistance and improved stability, compared to double-layer structures.
- Internal wear occurs in SSB structures. Internal wear occurs when the paper-side and the wear-side layers are not connected to each other closely enough, which results in the layers rubbing against each other. In SSB structures, internal wear especially occurs in the intersections of the binding yarns. The movement of the paper side and wear side against each other causes wear on the warp or weft yarns above and below the intersection of the binding yarns. The wear changes the overlap of the layers in the direction of the warp and the per- meability of the paper machine fabric deteriorates considerably. The wear may be uneven, which means that the overlap of warp threads may vary over the width of the machine, causing profile issues in the paper.
- the binding yarn pairs in SSB structures also increase the thickness of the wire.
- the thickness of the paper machine fabric becomes a problem for certain types of fast paper machines.
- the purpose of the invention is to create a paper machine fabric that can eliminate the disadvantages of the prior art. This has been accomplished by the paper machine fabric of the invention.
- the paper machine fabric of the invention is known for each binding top weft being adjusted to form a continuous inde- pendent yarn path.
- One of the advantages of the invention is that all yarns on the paper side are independent and form the paper side surface.
- two binding yarns form a continuous yarn path together.
- the weaving machine must beat two more wefts in between the warps or, in other words, two beats of the reed are needed when weaving.
- each weft forms an independent weft path. Consequently, all yarns on the paper side are counted in the density. Therefore, only one beat of the reed per yarn path is needed in the weaving machine. This means that each beat of the reed advances the formation of the fabric, speeds up the weaving and improves the production efficiency at the weaving mill.
- the bottom warp, bound by the binding top weft rises up inside the fabric to an extent, which creates a good binding. It is also advantageous that the bottom warp, bound by the binding top weft, does not quite reach the surface of the paper side, which means that the paper-side surface will not be blocked. In addition, the straighter the warps are in the final structure, the less the structure of the invention will stretch due to the tightness of the paper machine.
- the binding top weft binds to the bottom warp that rises between the top wefts, which makes the structure substantially thinner.
- the warp density is lower than in conventional SSB paper machine fabrics, which means that the weft density may be increased, so that the long edge of the openings on the paper-side surface is in the cross-machine direction to the paper machine; that is, perpendicular to the direction in which the paper fibres mainly orient when the paper web is formed.
- This shape of the opening provides optimal fibre support and dewatering.
- the weft floats of the invention on the paper side facilitate the detachment of the web at the paper machine; the thin structure also results in a better formation compared to prior art solutions.
- the structure of the invention creates a dense structure, whose thickness corresponds to the thickness of a double-layer wire, but whose stability corresponds to that of SSB structures.
- the invention makes it possible to combine the benefits of a double-layer wire and the SSB structure, while eliminating their drawbacks.
- the structure of the invention is thinner than the current SSB structures, which is a benefit, since a thin wire at the wet wire section improves the effect of low pressure and dewatering elements compared to SSB structures. Water removal can be accomplished more effectively at the paper machine, which re- Jerusalems the load of the paper machine. Reducing the paper machine load makes it possible to increase its speed. This in turn increases productivity.
- a thin structure is also an advantage when the aim is to improve the dry matter content of the paper web.
- the reason for a poor dry content in thick fabric structures is a large water space that increases the rewetting phenomenon.
- Rewetting refers to water drained from the paper web to the wire being absorbed back to the paper web in the wire section, after the dewatering elements.
- the paper web is drier as it enters the press section, there are fewer breaks and the consumption of steam at the press section is reduced. This saves energy.
- the increase of dry content by one per cent at the wet wire section may already make it possible to raise the speed of the paper machine to a new level.
- the structures of the invention Unlike in SSB structures, where the bottom warp is thicker than the top warp, the structures of the invention usually use warp yarns of the same thickness. This property directly affects the stiffness of the paper machine fabric in the direction of the warp.
- the stiffness of the structure of the invention is low in the warp direction, i.e. in the running direction of the paper machine fabric, which allows the structure to conform to the dewatering elements of the paper machine. This means that water is removed evenly over the fabric width at the different elements which results in a good formation.
- polyester in all binding top wefts and all top wefts, which improves stability and in turn reduces e.g. internal wear.
- An essential factor affecting the mechanical life of the fabric on the paper machine is the structure of the bottom side of the fabric, such as the length of the weft float, the number of weft yarns and their thickness.
- the floats on the bottom side form a 12-shaft structure. This embodiment of the invention enables the necessary longer mechanical life of the fabric on a paper machine.
- Figure 1 presents the first embodiment of the invention, as a view from the paper side
- Figure 2 presents the embodiment of the invention, according to Figure 1, as a view from the wear side
- Figure 3 presents the second embodiment of the invention as a view from the paper side
- Figure 4 presents the embodiment of the invention, according to Figure 3, as a view from the wear side
- Figure 5 presents the third embodiment of the invention as a view from the paper side
- Figure 6 presents the embodiment of the invention, according to Fig- ure 5, as a view from the wear side
- Figure 7 presents the fourth embodiment of the invention as a view from the paper side
- Figure 8 presents the embodiment of the invention, according to Figure 7, as a view from the wear side
- Figures 9a-9d present the fifth embodiment of the invention as views in the direction of warp threads.
- Figure 10 presents the sixth embodiment of the invention as a view from the paper side
- FIGS 1 and 2 show the first embodiment of the invention.
- Each top weft forms an independent yarn path.
- the paper side of the structure consists of the top warps (1) and the binding top wefts (2).
- the binding top wefts (2) bind to the top warps (1) under two top warps (1) and over two top warps (1).
- Each of the binding top wefts (2) binds to a bottom warp (3), and every bottom warp (3) is bound.
- the wear side of the structure consists of the bottom warps (3) and the bottom wefts (4).
- the wear-side weave is an 8-shaft weave, meaning that the bottom wefts (4) pass over two bottom warps (3) and under six bottom warps (3).
- the ratio of top wefts (2) to bottom wefts (4) is 2:1.
- FIGS 3 and 4 show the second embodiment of the invention.
- the same reference numbers are used in Figures 3 and 4 as in Figures 1 and 2 to refer to the corresponding parts.
- each top weft forms an independent yarn path.
- the paper side of the structure consists of the top warps (1) and the binding top wefts (2), in addition to the top wefts (2a).
- the top wefts (2a) are non-binding top wefts, meaning that the top wefts (2a) are not bound to the wear-side warps.
- the binding top wefts (2) bind to the top warps (1) under two top warps (1) and over two top warps (1).
- Each of the binding top wefts (2) binds to a bottom warp (3), and every other bottom warp (3) is bound. Between each pair of adjacent binding top wefts (2) is one non-binding top weft (2a), which binds to the top warps (1) under one top warp (1) and over three top warps (1).
- the wear side of the structure consists of the bottom warps (3) and the bottom wefts (4).
- the wear-side weave is an 8-shaft weave, meaning that the bottom wefts (4) pass over two bottom warps (3) and under six bottom warps (3).
- the ratio of top wefts to bottom wefts is 2:1.
- FIGS 5 and 6 show the third embodiment of the invention.
- the same reference numbers are used in Figures 5 and 6 as in Figures 4 and 5 to refer to the corresponding parts.
- each top weft forms an independent yarn path.
- the paper side of the structure consists of the top warps (1) and the binding top wefts (2), as well as the top wefts (2a).
- the top wefts (2a) are non-binding top wefts, which are not bound to the wear-side warps.
- the binding top wefts (2) bind to the top warps (1) under two top warps (1) and over two top warps (1).
- Each of the binding top wefts (2) binds to a bottom warp (3), and every other bottom warp (3) is bound.
- top weft (2a) Between each pair of adjacent binding top wefts (2) is one top weft (2a), which binds to the top warps (1) under one top warp (1) and over one top warp (1).
- the wear side of the structure consists of the bottom warps (3) and the bottom wefts (4).
- the wear-side weave is an 8-shaft weave, meaning that the bottom wefts (4) pass over two bottom warps (3) and under six bottom warps (3).
- the ratio of top wefts to bottom wefts is 2:1 and the ratio of top warps to bottom warps is 1:2.
- FIGs 7 and 8 show the fourth embodiment of the invention.
- the same reference numbers are used in Figures 7 and 8 as in e.g. Figures 5 and 6 to refer to the corresponding parts.
- each top weft forms an independent yarn path.
- the paper side of the structure consists of the top warps
- the top wefts (2a) are non-binding top wefts, which are not bound to the wear-side warps.
- the binding top wefts (2) bind to the top warps under one top warp (1) and over two top warps (1).
- Each of the binding top wefts (2) binds to a bottom warp (3), and every other bottom warp (3) is bound. Between each pair of adjacent binding top wefts
- top weft (2) is one non-binding top weft (2a), which binds to the top warps (1) under one top warp (1) and over two top warps (1).
- the wear side of the structure consists of the bottom warps (3) and the bottom wefts (4).
- the wear-side weave is a 6- shaft weave, meaning that the bottom wefts (4) pass over two bottom warps (3) and under four bottom warps (3).
- the ratio of top wefts to bottom wefts is 2:1.
- FIGS 9a-9d show the fifth embodiment of the invention.
- the same reference numbers are used in Figures 9a-9d as in the previous embodiments to refer to the corresponding parts.
- each top weft forms an independent yarn path.
- the paper side of the structure consists of the top warps (1) and the binding top wefts (2), as well as the top wefts (2a).
- the binding top wefts (2) bind to the top warps under three top warps (1) and over two top warps (1).
- Between each pair of adjacent binding top wefts (2) is one non-binding top weft (2a), which binds to the top warps (1) under two top warps (1) and over three top warps (1).
- the wear side of the structure consists of the bottom warps (3) and the bottom wefts (4).
- the wear-side weave is a 6-shaft weave, meaning that the bottom wefts (4) pass over one bottom warp and under five bottom warps (3), in such a way that the adjacent bottom warps are also bound.
- the bottom weft could also be bound in a 3-shaft or a 12-shaft structure. In the embodiment shown in Figures 9a-9d, the warp ratio is 5:3.
- FIG 10 shows the fifth embodiment of the invention.
- the same ref- erence numbers are used in Figure 10 as in e.g. Figure 5 to refer to the corresponding parts.
- each top weft forms an independent yarn path.
- the paper side of the structure consists of the top warps (1) and the binding top wefts (2), as well as the top wefts (2a).
- the top wefts (2a] are non- binding top wefts, which are not bound to the wear-side warps.
- the binding top wefts (2) bind to the top warps under one top warp (1) and over three top warps (1).
- Each of the binding top wefts (2) binds to a bottom warp (3), and every other bottom warp (3) is bound.
- Between each pair of adjacent binding top wefts (2) is one non-binding top weft (2a), which is bound to the top warps (1) under one top warp (1) and over three top warps (1).
- each top weft forms an independent yarn path.
- the paper side of the structure also consists of, at least, the top warps (1) and the binding top wefts (2).
- the weave of the binding top wefts (2) with the top warps (1) can vary, as shown in the figures, such as a 3-shaft or 4-shaft weave, twill, satin, etc.
- the binding top weft (2) always binds to at least one bottom warp.
- the binding top weft (2) can also bind to the bottom warps (3) in other ways, such as to every other bottom warp (3) or every third bottom warp (3).
- non-binding top wefts (2a) there may be non-binding top wefts (2a) in between the binding top wefts (2).
- Their weave can vary, meaning that the weave can be a 2-shaft weave, twill, satin, etc.
- the ratio of the binding top wefts (2) to the non-binding top wefts (2a) may be 1, >1 or ⁇ 1.
- the wear side of the structure consists of the bottom warps (3) and the bottom wefts (4).
- the wear-side weave can be twill or satin, for example, but other weaves are also possible.
- bottom weft (4) it is advantageous for the bottom weft (4) to bind to two adjacent bottom warps (3) and form a bottom weft loop after this, such as two over/3-14 under, but there are also other options from 2-shaft up to 16-shaft weaves.
- the ratio of top wefts to bottom wefts is 2:1 in many of the embodiments in the figures, but it can also be something else, such as 1:1, 1:2, 2:3, etc.
- the top warps can be located either on top of the bottom warps or between them; for example, in 1:2 one bottom warp can be directly under a top warp, while the other bottom warp does not have a pair, or a top warp can be in the middle of the bottom warps.
- the solutions described above use polyester and polyamide yarns.
- Other possible yarn materials include PEN (polyethylene naphthalate) or PPS (polyphenylene sulphide).
- the yarns or a part of the yarns may have a round cross-section or they may be, for example, profile yarns, where the cross-section is not round, but rather flat, oval, rectangle, or some other shape.
- the yarns may also be hollow, in which case they can flatten in the fabric and the structure can be made even thinner than before.
- One advantageous form of the invention is that all warps are 0.12 mm in diameter. The warp diameter may also be different; however, top warps > 0.08 mm and bottom warps > 0.11 mm.
- the diameter of the binding top wefts and the non-binding top wefts may be > 0.08 mm.
- bi- component yarns may also be used.
- the properties of the fabric can be influenced by the choice of yarn properties; for example, to achieve a thinner structure or an even paper-side surface, etc.
- the structure of the invention is intended for use as a wire in the wet section of a paper machine, but the structure can also be used with e.g. tissue, paperboard and non-woven machines.
- the structure of the invention can also be adjusted for use at the press or drying section of a paper machine.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3006527A CA3006527A1 (en) | 2015-12-04 | 2016-12-02 | Paper machine fabric |
EP16870051.6A EP3384085A4 (en) | 2015-12-04 | 2016-12-02 | Paper machine fabric |
CN201680078120.0A CN108474179A (en) | 2015-12-04 | 2016-12-02 | Paper machine clothing |
US15/781,241 US20180355555A1 (en) | 2015-12-04 | 2016-12-02 | Paper machine fabric |
JP2018528980A JP2018536103A (en) | 2015-12-04 | 2016-12-02 | Paper machine fabric |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20155918A FI20155918A (en) | 2015-12-04 | 2015-12-04 | paper machine |
FI20155918 | 2015-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017093614A1 true WO2017093614A1 (en) | 2017-06-08 |
Family
ID=58796365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2016/050851 WO2017093614A1 (en) | 2015-12-04 | 2016-12-02 | Paper machine fabric |
Country Status (7)
Country | Link |
---|---|
US (1) | US20180355555A1 (en) |
EP (1) | EP3384085A4 (en) |
JP (1) | JP2018536103A (en) |
CN (1) | CN108474179A (en) |
CA (1) | CA3006527A1 (en) |
FI (1) | FI20155918A (en) |
WO (1) | WO2017093614A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20205583A1 (en) * | 2020-06-04 | 2021-12-05 | Valmet Technologies Oy | An industrial textile for manufacturing a fibrous web |
FI20206371A1 (en) * | 2020-12-23 | 2022-06-24 | Valmet Technologies Inc | Industrial textile |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE140569C (en) * | ||||
DE3329740A1 (en) * | 1983-08-17 | 1985-03-07 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | COVERING FOR PAPER MACHINES |
US4995429A (en) * | 1986-02-05 | 1991-02-26 | Albany International Corp. | Paper machine fabric |
US20060162804A1 (en) * | 2002-11-16 | 2006-07-27 | Wolfgang Heger | Papermaking screen |
EP1936024A1 (en) * | 2006-12-22 | 2008-06-25 | Voith Patent GmbH | Forming fabric having binding weft yarns |
EP2314762A1 (en) * | 2009-10-23 | 2011-04-27 | Heimbach GmbH & Co.KG | Woven paper maker fabric |
US20140345819A1 (en) * | 2011-10-04 | 2014-11-27 | ANDRITZ KUFFERATH GmbH | Papermaking fabric |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052448A (en) * | 1989-02-10 | 1991-10-01 | Huyck Corporation | Self stitching multilayer papermaking fabric |
JP4584397B2 (en) * | 2000-02-24 | 2010-11-17 | 日本フイルコン株式会社 | 2-layer fabric for papermaking |
JP2003013384A (en) * | 2001-06-29 | 2003-01-15 | Nippon Felt Co Ltd | Woven fabric for paper manufacture |
FI112261B (en) * | 2002-05-06 | 2003-11-14 | Tamfelt Oyj Abp | A paper machine fabric |
JP5777826B2 (en) * | 2012-12-27 | 2015-09-09 | 日本フイルコン株式会社 | Industrial two-layer fabric |
JP6280325B2 (en) * | 2013-07-12 | 2018-02-14 | 日本フイルコン株式会社 | Industrial two-layer fabric |
-
2015
- 2015-12-04 FI FI20155918A patent/FI20155918A/en not_active IP Right Cessation
-
2016
- 2016-12-02 EP EP16870051.6A patent/EP3384085A4/en not_active Withdrawn
- 2016-12-02 CN CN201680078120.0A patent/CN108474179A/en active Pending
- 2016-12-02 US US15/781,241 patent/US20180355555A1/en not_active Abandoned
- 2016-12-02 CA CA3006527A patent/CA3006527A1/en not_active Abandoned
- 2016-12-02 WO PCT/FI2016/050851 patent/WO2017093614A1/en active Application Filing
- 2016-12-02 JP JP2018528980A patent/JP2018536103A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE140569C (en) * | ||||
DE3329740A1 (en) * | 1983-08-17 | 1985-03-07 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | COVERING FOR PAPER MACHINES |
US4995429A (en) * | 1986-02-05 | 1991-02-26 | Albany International Corp. | Paper machine fabric |
US20060162804A1 (en) * | 2002-11-16 | 2006-07-27 | Wolfgang Heger | Papermaking screen |
EP1936024A1 (en) * | 2006-12-22 | 2008-06-25 | Voith Patent GmbH | Forming fabric having binding weft yarns |
EP2314762A1 (en) * | 2009-10-23 | 2011-04-27 | Heimbach GmbH & Co.KG | Woven paper maker fabric |
US20140345819A1 (en) * | 2011-10-04 | 2014-11-27 | ANDRITZ KUFFERATH GmbH | Papermaking fabric |
Non-Patent Citations (1)
Title |
---|
See also references of EP3384085A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP3384085A4 (en) | 2019-11-27 |
US20180355555A1 (en) | 2018-12-13 |
FI20155918A (en) | 2017-06-05 |
JP2018536103A (en) | 2018-12-06 |
CA3006527A1 (en) | 2017-06-08 |
EP3384085A1 (en) | 2018-10-10 |
CN108474179A (en) | 2018-08-31 |
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