EP0590288B1 - Mehrlagiges Pressensieb für Nasspressen einer Papiermaschine - Google Patents
Mehrlagiges Pressensieb für Nasspressen einer Papiermaschine Download PDFInfo
- Publication number
- EP0590288B1 EP0590288B1 EP93113084A EP93113084A EP0590288B1 EP 0590288 B1 EP0590288 B1 EP 0590288B1 EP 93113084 A EP93113084 A EP 93113084A EP 93113084 A EP93113084 A EP 93113084A EP 0590288 B1 EP0590288 B1 EP 0590288B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- threads
- sieve according
- press
- water reservoir
- fabric
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004744 fabric Substances 0.000 claims abstract description 35
- 230000001070 adhesive effect Effects 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 2
- 230000004075 alteration Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 33
- 238000003860 storage Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/90—Papermaking press felts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3065—Including strand which is of specific structural definition
- Y10T442/3089—Cross-sectional configuration of strand material is specified
- Y10T442/3114—Cross-sectional configuration of the strand material is other than circular
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3472—Woven fabric including an additional woven fabric layer
- Y10T442/3528—Three or more fabric layers
Definitions
- the invention relates to a multi-layer press screen for wet pressing a paper machine.
- the invention has for its object to improve the known press screens of the type mentioned. This object is achieved by a press screen with the features of claim 1.
- the water storage integrated into the fabric of the press screen prevents due to its capillary and / or adhesive property that the water taken up by the press belt in the nip of a wet press does not prematurely after the press screen emerges from the wet press by a so-called film splitting on a guide roller or the like or under the influence of centrifugal force is given off during a deflection, rather can be transported to a drainage station, which is formed, for example, by a pipe suction device.
- An early release of water can lead to spraying and the formation of water mist in the wet press, which can be disruptive to the manufacturing process due to the formation of drops and the like.
- the water reservoir is formed by additional threads running in the transverse direction of the sieve and / or in the longitudinal direction of the sieve, wherein these threads can be included in at least one of the sieve layers or can also form an additional layer, which is preferably designed such that it is highly capillary and has a high wettable surface.
- Multifilament yarns, staple fiber yarns, micro yarns, i.e. yarns in the titer range below 1 dtex, but also monofilament profile threads with an increased surface area, are therefore particularly suitable for the water reservoir. All of these threads can be very thin because, due to the distance from the contact surface for the web to be dewatered and from the machine running side, they are protected against wear by external influences.
- the threads of the water reservoir can be arranged in one or more weft layers and / or warp layers. Furthermore, it is not necessary to form the water reservoir exclusively from multifilament yarns, staple fiber yarns and micro yarns. Alternating monofilament and multifilament threads can also follow one another.
- the screen fabric is designed so that its water permeability decreases according to a double funnel from the contact surface for the web to be dewatered towards the water reservoir, has its smallest value in the area of the water reservoir and increases again from here to the machine running side. This results in a particularly high drainage capacity of the screen fabric, especially since the water storage tank has a retention capacity counteracts a so-called rewetting of the web, ie a release of water to the web after leaving the press nip.
- the top layer on the preferably monoplan-shaped upper side of which the web to be dewatered comes into contact, advantageously has at least no significant change in its hydraulic drainage resistance under the pressure load in a press which allows dimensional stability. This ensures that the lowest possible hydraulic drainage resistance is opposed to the water pressed out of the web in the press nip, which is important for absorbing the water in the press nip.
- the top layer therefore consists of pressure-resistant, monofilament threads.
- the monofilament longitudinal threads of the top layer can also have a rectangular, oval or dumbbell-shaped cross-section instead of a round one, whereby the specific pressure load of the monofilament threads can be changed and the effective contact surface for the web can be changed, for example enlarged.
- At least the longitudinal threads also consist of pressure-resistant, monofilament threads, which in addition to a round one also have a rectangular, oval or can have a hand-shaped cross-section, which, like the profile threads of the top layer, can change the specific pressure load of the threads and the effective running surface of the screen fabric.
- the water retention capacity of the underlay can be increased if necessary by weaving threads twisted from monofilaments.
- the monofilament threads are preferably made of a plastic such as PA 6.12 or PA 6.10, which has a water absorption of less than 6%.
- a multi-layer press screen which instead of a press felt carries a web to be dewatered when it passes through a wet press of a paper or board machine, consists of an upper fabric designated as a whole with 1, the upper side of which forms the contact surface for the web to be dewatered, one as a whole with 2 designated sub-fabric, which forms the machine running side of the press screen and an intermediate layer 10 arranged between the two.
- the upper fabric 1 is made in the embodiment, but can also be multi-layer. In the case of a multi-layer design, the lower layer adjacent to the intermediate fabric 3 would preferably be designed so that its hydraulic drainage resistance is greater than that of the upper layer.
- the side of the upper fabric 1 forming the contact surface for the draining web is monoplan.
- both the weft threads 4 and the warp threads 5 are monofilament threads made of pressure-resistant plastic, whereby not only those with a circular cross-section come into question, but also those with an enlarged surface, for example monofilament threads with a rectangular, oval or dumbbell-shaped cross-section.
- Such cross-sectional shapes reduce the specific pressure load on the threads and increase the effective size of the contact surface for the web to be dewatered.
- the lower fabric 2 has an upper weft layer consisting of upper wefts 6 and a lower weft layer consisting of lower wefts 7.
- Each of the sub-shots 7 is precisely aligned with one of the upper shots 6.
- Warp threads 8 bind with the upper wefts 6 and the lower wefts 7 in such a way that the hydraulic drainage resistance of the lower layer of the lower fabric 2 is lower than that of the upper layer.
- the inclusion of the warp threads 8 in the lower layer is therefore less than in the upper layer.
- the binding is chosen so that it supports the achievement of a dimensional stability of the lower fabric 2 under the pressure prevailing in the nip of a wet press.
- the dimensional stability of the lower fabric 2 which ensures that the space made available for the absorption of water is not significantly reduced in the press nip, is achieved by using monofilament threads.
- These threads can have a rectangular, oval or dumbbell-shaped cross-section instead of the round one, which reduces the specific pressure load of the threads and increases the effective machine running surface.
- the intermediate layer 10 is arranged, which in the exemplary embodiment consists exclusively of weft threads 11, which are arranged in a single layer.
- the intermediate layer 10 can consist of a single or multi-layer fabric, that is to say both of weft threads and of warp threads.
- all weft threads 11 are multifilament threads. If monofilament threads are also used, then preferably monofilament and multifilament threads follow one another alternately. Monofilament threads in the intermediate layer 10 have a positive effect on the desired incompressibility of the entire press screen.
- the intermediate layer 10 is highly capillary and adhesive for water. It therefore forms a water reservoir at a distance from the top surface of the upper fabric 1 forming the contact surface for the web to be dewatered, which has a very small storage capacity, but only releases the water stored in it at very high forces.
- the intermediate layer 10 therefore effectively prevents the water taken up by the press screen in the nip of a press from being released prematurely after leaving the press nip, either by centrifugal forces when deflected by a guide roller or by film splitting on a roller surface.
- the intermediate layer 10 which has the effect of a compacted fabric layer with an extremely high wettable surface and fine capillary mesh openings, has the highest hydraulic drainage resistance. Therefore, the hydraulic drainage resistance of the contact surface for the web to be dewatered top of the upper fabric 1 to the intermediate layer 10 to where it has its greatest value, and then decreases again to the machine running side. It is therefore comparable to a double funnel.
- the size of the openings serving for dewatering decreases according to a double funnel from the contact surface for the web to be dewatered to the intermediate layer 10 and then again to the machine running side, that is to say the underside of the lower fabric 2.
Landscapes
- Paper (AREA)
- Woven Fabrics (AREA)
- Braking Arrangements (AREA)
- Sheet Holders (AREA)
- Inorganic Insulating Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4232319 | 1992-09-26 | ||
DE4232319A DE4232319A1 (de) | 1992-09-26 | 1992-09-26 | Mehrlagiges Pressensieb für Naßpressen einer Papiermaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0590288A1 EP0590288A1 (de) | 1994-04-06 |
EP0590288B1 true EP0590288B1 (de) | 1995-11-02 |
Family
ID=6468922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93113084A Expired - Lifetime EP0590288B1 (de) | 1992-09-26 | 1993-08-16 | Mehrlagiges Pressensieb für Nasspressen einer Papiermaschine |
Country Status (10)
Country | Link |
---|---|
US (1) | US5601691A (fi) |
EP (1) | EP0590288B1 (fi) |
JP (1) | JPH06294089A (fi) |
AT (1) | ATE129763T1 (fi) |
CA (1) | CA2106362A1 (fi) |
DE (2) | DE4232319A1 (fi) |
DK (1) | DK0590288T3 (fi) |
ES (1) | ES2079930T3 (fi) |
FI (1) | FI97158C (fi) |
NO (1) | NO304995B1 (fi) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT400854B (de) * | 1994-07-01 | 1996-04-25 | Hutter & Schrantz Papiermaschi | Gewebe zum einsatz als papiermaschinenbespannung |
DE4423436A1 (de) * | 1994-07-05 | 1996-01-11 | Franz F Kufferath | Verfahren zur Entwässerung einer Papierbahn und Vorrichtung zur Durchführung des Verfahrens |
DE9416520U1 (de) * | 1994-10-14 | 1996-02-15 | Württembergische Filztuchfabrik D. Geschmay GmbH, 73035 Göppingen | Preßfilz für die Entwässerung |
US5651394A (en) * | 1996-02-02 | 1997-07-29 | Huyck Licensco, Inc. | Papermakers fabric having cabled monofilament oval-shaped yarns |
GB9609761D0 (en) * | 1996-05-10 | 1996-07-17 | Jwi Ltd | Low air permeability papermaking fabric including flattened secondary weft yarns and pin seam |
US5787936A (en) * | 1996-11-22 | 1998-08-04 | Asten, Inc. | Laminated papermaker's fabric having projecting seaming loops |
US6030908A (en) * | 1998-03-16 | 2000-02-29 | Jwi Ltd. | Multilayer porous fabric |
DE19859582A1 (de) * | 1998-12-22 | 2000-06-29 | Voith Fabrics Heidenheim Gmbh | Drei- oder mehrlagiges Papiermaschinensieb in Form eines Verbundgewebes |
JP3938817B2 (ja) * | 1999-02-16 | 2007-06-27 | 日本フイルコン株式会社 | 工業用織物の接合用ループとこのループを用いた接合部 |
US6331341B1 (en) | 1999-07-09 | 2001-12-18 | Albany International Corp. | Multiaxial press fabric having shaped yarns |
US7059361B1 (en) * | 2005-04-28 | 2006-06-13 | Albany International Corp. | Stable forming fabric with high fiber support |
JP4828330B2 (ja) * | 2006-07-07 | 2011-11-30 | 日本フイルコン株式会社 | パルプマシン用プレスファブリック |
CA2600307A1 (en) * | 2007-09-07 | 2009-03-07 | Ralph Roemer | Fabric for producing spunmelt or airlaid nonwovens including profiled yarns for soil release and contamination resistance |
GB2511947A (en) * | 2011-10-03 | 2014-09-17 | Itex Fabrics Ltd | Multilayer woven fabric and method of formation thereof |
EP3029187A4 (en) * | 2013-07-31 | 2017-05-10 | Nippon Filcon Co., Ltd | Industrial fabric by double-warp and single-weft woven fabric |
DE202013104888U1 (de) | 2013-10-31 | 2015-02-02 | Heimbach Gmbh & Co. Kg | Durchströmbare Bespannung für Papier- oder Zellstoffentwässerungsmaschinen sowie deren Verwendung |
DE102018123390A1 (de) | 2018-09-24 | 2020-03-26 | Voith Patent Gmbh | Maschine und Verfahren zur Herstellung einer Faserstoffbahn |
DE102018123389A1 (de) * | 2018-09-24 | 2020-02-13 | Voith Patent Gmbh | Maschine und Verfahren zur Herstellung einer Faserstoffbahn |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3158984A (en) * | 1962-08-10 | 1964-12-01 | Lindsay Wire Weaving Co | Porous fabric or structure and the method of making the same |
US4162190A (en) * | 1974-04-29 | 1979-07-24 | Scapa-Porritt Limited | Paper makers wet felts |
US4199401A (en) * | 1979-03-01 | 1980-04-22 | Asten Group, Inc. | Felt for papermaking machine |
US4361618A (en) * | 1981-05-18 | 1982-11-30 | Ascoe Felts, Inc. | Papermakers felt with improved drainage |
US4633596A (en) * | 1981-09-01 | 1987-01-06 | Albany International Corp. | Paper machine clothing |
US4503113A (en) * | 1982-03-12 | 1985-03-05 | Huyck Corporation | Papermaker felt with a three-layered base fabric |
US4414263A (en) * | 1982-07-09 | 1983-11-08 | Atlanta Felt Company, Inc. | Press felt |
US4799998A (en) * | 1983-08-01 | 1989-01-24 | Albany International Corp. | Papermachine clothing |
FI72362C (fi) * | 1983-10-03 | 1987-05-11 | Tamfelt Oy Ab | Foerfarande och medel foer att aostadkomma avlaegsnande av vatten i en press vid en pappersmaskin. |
US4533594A (en) * | 1983-12-16 | 1985-08-06 | Porritts & Spencer | Batt-on-mesh felt employing polyurethane-coated multifilaments in the cross-machine direction |
US4520059A (en) * | 1983-12-16 | 1985-05-28 | Engineered Yarns, Inc. | Ionomer-coated yarns and their use in papermakers wet press felts |
DE3426264A1 (de) * | 1984-07-17 | 1986-01-30 | Franz F. 5160 Düren Kufferath | Entwaeserungsband fuer pressen in der nasspartie einer papiermaschine |
CA1277209C (en) * | 1986-11-28 | 1990-12-04 | Dale B. Johnson | Composite forming fabric |
US4705601A (en) * | 1987-02-05 | 1987-11-10 | B.I. Industries, Inc. | Multi-ply paper forming fabric with ovate warp yarns in lowermost ply |
FI78329B (fi) * | 1987-02-10 | 1989-03-31 | Tamfelt Oy Ab | Pappersmaskinduk. |
EP0346307A3 (en) * | 1988-06-09 | 1991-03-06 | Nordiskafilt Ab | Wet press felt to be used in a papermaking machine |
US4943476A (en) * | 1988-10-27 | 1990-07-24 | Albany International Corp. | Water removal on papermachine through riblet effect |
DE4002761A1 (de) * | 1990-01-31 | 1991-08-01 | Heimbach Gmbh Thomas Josef | Pressfilz |
US5097872A (en) * | 1990-12-17 | 1992-03-24 | Tamfelt, Inc. | Woven work fabric with X-shaped monofilament yarns |
DE4040861C3 (de) * | 1990-12-20 | 2001-02-01 | Conrad Munzinger & Cie Ag Olte | Preßfilz sowie Verfahren zu dessen Herstellung |
US5360518A (en) * | 1991-12-18 | 1994-11-01 | Albany International Corp. | Press fabrics for paper machines |
US5366798A (en) * | 1993-11-30 | 1994-11-22 | Wangner Systems Corporation | Multi-layered papermaking fabric having stabilized stacked weft yarn |
-
1992
- 1992-09-26 DE DE4232319A patent/DE4232319A1/de not_active Withdrawn
-
1993
- 1993-08-16 AT AT93113084T patent/ATE129763T1/de not_active IP Right Cessation
- 1993-08-16 EP EP93113084A patent/EP0590288B1/de not_active Expired - Lifetime
- 1993-08-16 ES ES93113084T patent/ES2079930T3/es not_active Expired - Lifetime
- 1993-08-16 DK DK93113084.3T patent/DK0590288T3/da active
- 1993-08-16 DE DE59300854T patent/DE59300854D1/de not_active Expired - Lifetime
- 1993-09-16 CA CA002106362A patent/CA2106362A1/en not_active Abandoned
- 1993-09-22 FI FI934148A patent/FI97158C/fi active
- 1993-09-23 US US08/125,190 patent/US5601691A/en not_active Expired - Lifetime
- 1993-09-24 NO NO933412A patent/NO304995B1/no not_active IP Right Cessation
- 1993-09-24 JP JP5237863A patent/JPH06294089A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
NO933412D0 (no) | 1993-09-24 |
NO933412L (no) | 1994-03-28 |
ATE129763T1 (de) | 1995-11-15 |
US5601691A (en) | 1997-02-11 |
FI97158B (fi) | 1996-07-15 |
JPH06294089A (ja) | 1994-10-21 |
ES2079930T3 (es) | 1996-01-16 |
DK0590288T3 (da) | 1996-03-04 |
FI934148A0 (fi) | 1993-09-22 |
CA2106362A1 (en) | 1994-03-27 |
FI934148A (fi) | 1994-03-27 |
EP0590288A1 (de) | 1994-04-06 |
DE59300854D1 (de) | 1995-12-07 |
FI97158C (fi) | 1996-10-25 |
NO304995B1 (no) | 1999-03-15 |
DE4232319A1 (de) | 1994-03-31 |
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