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US20110100576A1 - Seamed press felt of multilayered base-fabric structure for papermaking and process for producing the same - Google Patents

Seamed press felt of multilayered base-fabric structure for papermaking and process for producing the same Download PDF

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Publication number
US20110100576A1
US20110100576A1 US12/673,369 US67336908A US2011100576A1 US 20110100576 A1 US20110100576 A1 US 20110100576A1 US 67336908 A US67336908 A US 67336908A US 2011100576 A1 US2011100576 A1 US 2011100576A1
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US
United States
Prior art keywords
base fabric
seam
seam loops
base
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.)
Abandoned
Application number
US12/673,369
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English (en)
Inventor
Yasuyuki Ogiwara
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.)
Ichikawa Co Ltd
Original Assignee
Ichikawa Co Ltd
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 Ichikawa Co Ltd filed Critical Ichikawa Co Ltd
Assigned to ICHIKAWA CO., LTD. reassignment ICHIKAWA CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OGIWARA, YASUYUKI
Publication of US20110100576A1 publication Critical patent/US20110100576A1/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
    • D21F7/083—Multi-layer felts

Definitions

  • the present invention relates to a seamed papermaking press felt with a multilayer base fabric structure, which is a felt used in a press part of a papermaking machine, and a method for producing the same.
  • Conventional seamed felts which have seam loops at both ends, are made into an endless form by interdigitating said seam loops with one another after passing them between the rolls of the papermaking machine and joining them by passing a pintle wire through the common hole thus formed. Due to adopting a multilayer structure base fabric it is possible to obtain high quality seamed felts of a greater void volume than with seamed felts of a single base fabric, which are suitable for parts with high dewatering volume and parts with high nip pressure.
  • This type of seamed felt is made into an open-ended form by joining a base fabric having seam loops into an endless form via a pintle wire passed through the seam loops, by using this as a lower fabric on the external circumference of which one or more layers of an upper fabric made from a base fabric without seam loops is (are) superposed, by attaching the upper fabric with the lower fabric by needling after posing a batt material on the external circumference of the upper fabric, and by thereafter cutting the upper fabric in the widthwise direction at the seam loop part of the lower fabric or in the vicinity thereof.
  • patent documents 1 and 2 heat melt fibers of a low melting point material are used for the yarns constituting the upper fabric, and the crossing points are stuck to each other (refer to patent document 1, FIG. 5).
  • seam loops are also formed in the base fabric on the wet paper contacting side.
  • Yarns need to have sufficient strength to form seam loops, which means that yarns of a big diameter have to be used; however, base fabrics woven with yarns of a big diameter have a rough surface, which causes the wet paper to have a bad surface smoothness, and since the adhesion of the batt is also bad, fibers are easily lost and the felt is quickly worn.
  • due to a plurality of seam parts only inferior seaming operations during installation are achieved.
  • the object of the present invention after reflecting upon the above-mentioned problems, in particular the use of felts using a base fabric of a thick and hard multilayer structure that resulted from the increase in operating speed, is to provide a single seam felt, for excellent surface smoothness of the wet paper, having good adhesion to the batt, and wherein, at the seam part of the stacked base fabric, the warp yarns do not fray and the weft yarns do not come loose.
  • the present invention essentially relates to a seamed papermaking press felt with a multilayer base fabric structure and is based on the technologies hereinafter.
  • Seamed papermaking press felt comprising a woven base material having seam loops at both ends and a batt layer, wherein
  • said base material comprises a first base fabric having seam loops at both ends which is joined into an endless form by passing a pintle wire through said seam loops and one or more second base fabric(s) having seam loops at both ends, through which a pintle wire is not passed, which is (are) stacked onto said first base fabric,
  • said batt layer which is disposed at least on the wet paper side of said base material and is entangled with said base material, is cut in the widthwise direction in the vicinity of the seam loop part of said second base fabric.
  • said base material comprises a first base fabric having seam loops at both ends and one or more second base fabric(s) having seam loops at both ends which is (are) stacked onto said first base fabric,
  • said batt layer which is attached by entanglement at least to the wet paper side of said base material, is cut in the widthwise direction at the seam loop part of said second base fabric or in the vicinity thereof,
  • said pintle wire joins said first base fabric into an endless form on the papermaking machine by being passed through the seam loops of said first base fabric.
  • a method for producing a seamed papermaking press felt comprising a woven base material having seam loops at both ends and a batt layer, comprising
  • a method for producing a seamed papermaking press felt further comprising a process for weaving yarns in the vicinity of the seam loop part of said second base fabric, when said second base fabric is woven, to reduce the opening formed by the seam loops of said second base fabric.
  • a method for producing a seamed papermaking press felt further comprising a process for inserting yarns in the vicinity of the seam loop part of said second base fabric, after weaving the second base fabric and before entangling the batt part with the base material, to reduce the opening formed by the seam loops of said second base fabric.
  • the present invention it is possible to provide a single seam felt for excellent surface smoothness of the wet paper, having good adhesion to the batt, and wherein, at the seam part of the stacked base fabric, the warp yarns do not fray and the weft yarns do not come loose.
  • FIG. 1 An enlarged sectional view of a felt according to the present invention at the seam loop part and the vicinity thereof before the felt is cut in the widthwise direction at the seam part or the vicinity thereof.
  • FIG. 2 An enlarged sectional view of a felt according to the present invention at the seam loop part and the vicinity thereof when the felt is cut in the widthwise direction at the seam part or the vicinity thereof.
  • FIG. 3 An enlarged sectional view of a felt according to the present invention at the seam loop part and the vicinity thereof after installing on a papermaking machine wherein the felt is cut in the widthwise direction at the seam part or the vicinity thereof.
  • FIG. 4 A view of a felt according to the present invention in which yarns are disposed in the vicinity of the seam loop part of the second base fabric.
  • FIG. 5 A view of the prior art.
  • FIG. 6 A illustrative diagram of a marking test.
  • FIG. 7 A illustrative diagram of a wear test used for measuring the amount of lost fibers.
  • the fiber materials used for the yarns constituting the base fabrics and for the batt layer in the present invention which can be those that are generally used for the press felts of papermaking machines, are appropriately be selected from such fiber materials as nylon, polyester, polypropylene, natural materials.
  • a batt layer is disposed at least on the wet paper side of a base material comprising the first base fabric and one or more second base fabric (s) and is attached to said base material by entanglement with such treatment as needling or fluid entanglement.
  • the present invention is not limited to providing a batt layer only on the wet paper side of the second base fabric; a batt layer can also be disposed on the machine side (roller side) of the first base fabric.
  • the batt fibers may penetrate to the machine side of the first base fabric when needling is performed.
  • batt fibers batt fibers
  • the batt fibers in the vicinity of the seam loops ( 1 L) of the first base fabric may be removed in the widthwise direction.
  • yarns that will swell when the press felt is used may be inserted in the vicinity of the seam loop part of the second base fabric so as to reduce the opening formed by the seam loops of the second base fabric, and to improve the adhesion of the batt and to ameliorate marking.
  • materials with a prescribed moisture percentage of 4.5% or more e.g. very hydrophilic materials that have the ability to absorb more water content such as nylon, vinylon, acetate, rayon, polynosic, cupra, cotton, hemp, silk, wool, etc. can be used; multi-filaments, bulky yarns and spun yarns made from a tow of 1500 to 1600 dtex are preferably used.
  • FIG. 1 shows felt ( 1 ) in the attached state in which a batt layer ( 30 ) is entangled with a base material comprising a first base fabric ( 10 ) and a second base fabric ( 20 ), wherein said batt layer is stacked at least onto the wet paper side of the second base fabric.
  • This attached felt is produced by abutting the seam loops of the first base fabric having seam loops ( 1 L) at both ends and the second base fabric having seam loops ( 2 L) at both ends so that the respective seam loops interdigitated with one another, by joining said seam loops into endless forms via pintle wires ( 13 ), ( 23 ) passed through the respective common holes thus formed, and by thereafter entangling both with the batt layer.
  • the pintle wires ( 13 ), ( 23 ) are once withdrawn and the batt layer ( 30 ) is cut in the widthwise direction at the seam loop ( 2 L) part of the second base fabric or in the vicinity thereof ( FIG. 2 ). In this way, the cut part of the batt layer can be formed on the side of wet paper without injuring the seam loops.
  • the felt ( 1 ) becomes an open-ended form which is joined into an endless form by passing the pintle wire ( 13 ) through only the seam loops ( 1 L) of the first base fabric ( 10 ) after passing them between the rolls of a papermaking machine. Then, a pintle wire is not inserted into the seam loops ( 2 L) of the second base fabric ( 20 ) ( FIG. 3 ).
  • the felt of the present invention is made up.
  • the yarns disposed in the vicinity of the seam loop part (outside the seam loops) of the second base fabric can be disposed by weaving yarns different from the fabric when weaving the second base fabric or by inserting into the opening in the vicinity of the seam loop part (outside the seam loops) with a music wire etc. after weaving and before the base material is entangled with the batt part.
  • the first base fabric and the second base fabric of the present invention are preferably woven fabrics woven with a warp double weave. Furthermore, woven fabrics with a weight per area unit in the range of 300 to 700 g/m 2 , preferably 450 to 650 g/m 2 , for the first base fabric, and 100 to 500 g/m 2 , preferably 200 to 400 g/m 2 , for the second base fabric, can be used as base fabric of the present invention.
  • the opening formed by the seam loops of the first base fabric is 0.24 to 1.86 mm 3 per loop and the opening formed by the seam loops of the second base fabric is 0.14 to 0.84 mm 3 per loop. It is further preferred in the present invention that the first base fabric has a loop length of 1.50 to 3.00 mm and a loop height of 0.50 to 1.50 mm and that the second base fabric has a loop length of 1.50 to 2.50 mm and a loop height of 0.50 to 1.00 mm. These dimensions can be measured by an optical microscope.
  • Base fabric material nylon Batt material: nylon, size 39 dtex Front batt amount: 500 g/m 2 Back batt amount: 200 g/m 2 Inserted yarns: 1500 dtex multifilament yarn (made by Toray Monofilament Co., Ltd., product number: 1450T-68-3158)
  • the evaluation tests hereinafter were conducted with the samples produced according to Examples 1, 2 and Comparative Examples 1 through 3.
  • the evaluated items adopted in the present invention were the time until loosening of the second base fabric (upper fabric) occurred, the marking properties, the amount of lost fibers, the time required for the seaming process. The results are shown in Table 2.
  • the time until loosening occurred was measured by a high speed—high pressure papermaking test.
  • the test conditions were as follows, papermaking speed: 1000 m/min, applied pressure: 100 kg/cm, HPS (high pressure shower): 15 kg/cm 2 .
  • the marking properties were evaluated by marking test using the device according to FIG. 6 .
  • felt, carbon paper, paper, batt were superposed and pressed by rolls (applied pressure: 30 kg/cm).
  • the batt was added by 100 gsm (gram per square meter).
  • the value of 1 part of 1000 of the batt weight was taken as marking index by which it was confirmed by visual observation that a base fabric marking was not transferred to the paper. The smaller the marking index the better the marking properties.
  • the test conditions were as follows: The amount of worn fibers was measured by electronic scales after 400 slides at a frequency of 30 slides per minute. Sliding distance: 100 mm, wear terminal area: 20 ⁇ 20 mm, applied weight of wear terminal: 500 g, and sandpaper with a grit of 320 was used.
  • the present invention it is possible to obtain, even when a base fabric of a multilayer structure is used, a single seam felt for excellent surface smoothness of the wet paper, having good batt adhesion, and wherein, at the seam part of the stacked base fabric, the warp yarns do not fray and the weft yarns do not come loose.
  • This felt is particularly useful, even when using base fabrics of a thick and hard multilayer structure that have come into use as a result of the increase in operating speed, to increase wear resistance and dewatering capability during high speed operation, to obtain excellent surface smoothness of the wet paper surface and durability, and to facilitate the installing operations.

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US12/673,369 2007-08-10 2008-08-08 Seamed press felt of multilayered base-fabric structure for papermaking and process for producing the same Abandoned US20110100576A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007210505A JP2009041161A (ja) 2007-08-10 2007-08-10 多層基布構造のシーム付抄紙用プレスフェルト及びその製造方法
JP2007-210505 2007-08-10
PCT/JP2008/064274 WO2009022636A1 (ja) 2007-08-10 2008-08-08 多層基布構造のシーム付抄紙用プレスフェルトおよびその製造方法

Publications (1)

Publication Number Publication Date
US20110100576A1 true US20110100576A1 (en) 2011-05-05

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US12/673,369 Abandoned US20110100576A1 (en) 2007-08-10 2008-08-08 Seamed press felt of multilayered base-fabric structure for papermaking and process for producing the same

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US (1) US20110100576A1 (es)
JP (1) JP2009041161A (es)
CL (1) CL2008002325A1 (es)
TW (1) TW200932995A (es)
WO (1) WO2009022636A1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8540849B2 (en) 2010-12-08 2013-09-24 Ichikawa Co., Ltd. Press felt for papermaking
US20150240421A1 (en) * 2012-11-13 2015-08-27 Georgia-Pacific Consumer Products Lp Apparatus, system, and process for determining characteristics of a surface of a papermaking fabric
US9953405B2 (en) 2012-11-13 2018-04-24 Gpcp Ip Holdings Llc Process of determining characteristics of a surface of a papermaking fabric
US11098450B2 (en) 2017-10-27 2021-08-24 Albany International Corp. Methods for making improved cellulosic products using novel press felts and products made therefrom
US11286194B2 (en) 2018-06-19 2022-03-29 Kilncore Inc. Self-replicating fused deposition modeling printer using granules

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112016008105B1 (pt) * 2013-11-12 2022-02-08 Gpcp Ip Holdings Llc Processos para determinar propriedades de um tecido
JP6433229B2 (ja) * 2014-10-06 2018-12-05 日本フエルト株式会社 製紙用シームフェルト及びその製造方法
WO2018222633A1 (en) * 2017-05-31 2018-12-06 Huyck Licensco Inc. Pin seamed press felt and method of making same
JP7244323B2 (ja) * 2019-03-27 2023-03-22 日本フエルト株式会社 製紙用シームフェルト及びその製造方法
JP7334100B2 (ja) * 2019-09-23 2023-08-28 日本フエルト株式会社 製紙用シームフェルト用基布及びその製造方法
JP7094433B1 (ja) * 2021-12-27 2022-07-01 イチカワ株式会社 抄紙用フェルト用基布およびこれをつなぎ合わされてなる抄紙用フェルト

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4863786A (en) * 1987-03-28 1989-09-05 Scapa Group Plc Papermachine clothing
US6213164B1 (en) * 1999-03-11 2001-04-10 Geschmay Corporation Pintle seamed press felt
US20040094281A1 (en) * 2002-11-15 2004-05-20 Hansen Robert A Stratified press fabric
US6773553B2 (en) * 2000-12-18 2004-08-10 Tamfelt Oyj Abp Method of making press felt, and press felt

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5571199U (es) * 1978-11-07 1980-05-16
JPS5571200U (es) * 1978-11-07 1980-05-16
JP2678611B2 (ja) * 1988-03-11 1997-11-17 市川毛織株式会社 抄紙用ニードルフェルト
JP4045134B2 (ja) * 2002-07-02 2008-02-13 日本フエルト株式会社 製紙用シーム付きフェルト及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4863786A (en) * 1987-03-28 1989-09-05 Scapa Group Plc Papermachine clothing
US6213164B1 (en) * 1999-03-11 2001-04-10 Geschmay Corporation Pintle seamed press felt
US6773553B2 (en) * 2000-12-18 2004-08-10 Tamfelt Oyj Abp Method of making press felt, and press felt
US20040094281A1 (en) * 2002-11-15 2004-05-20 Hansen Robert A Stratified press fabric

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8540849B2 (en) 2010-12-08 2013-09-24 Ichikawa Co., Ltd. Press felt for papermaking
US8815055B2 (en) 2010-12-08 2014-08-26 Ichikawa Co., Ltd. Press felt for papermaking
US20150240421A1 (en) * 2012-11-13 2015-08-27 Georgia-Pacific Consumer Products Lp Apparatus, system, and process for determining characteristics of a surface of a papermaking fabric
US9879378B2 (en) 2012-11-13 2018-01-30 Gpcp Ip Holdings Llc Apparatus, system, and process for determining characteristics of a surface of a papermaking fabric
US9920480B2 (en) 2012-11-13 2018-03-20 Gpcp Ip Holdings Llc Process of using a characteristic of a first papermaking fabric to form a second papermaking fabric
US9920479B2 (en) 2012-11-13 2018-03-20 Gpcp Ip Holdings Llc Apparatus, system, and process for determining characteristics of a surface of a papermaking fabric
US9953405B2 (en) 2012-11-13 2018-04-24 Gpcp Ip Holdings Llc Process of determining characteristics of a surface of a papermaking fabric
US9963828B2 (en) * 2012-11-13 2018-05-08 Gpcp Ip Holdings Llc Apparatus, system, and process for determining characteristics of a surface of a papermaking fabric
US10392751B2 (en) 2012-11-13 2019-08-27 Gpcp Ip Holdings Llc Process of forming a second papermaking product based on characteristics of a first papermaking product
US10699397B2 (en) 2012-11-13 2020-06-30 Gpcp Ip Holdings Llc Processes of determining characteristics of a surface of a papermaking fabric
US11098450B2 (en) 2017-10-27 2021-08-24 Albany International Corp. Methods for making improved cellulosic products using novel press felts and products made therefrom
US11286194B2 (en) 2018-06-19 2022-03-29 Kilncore Inc. Self-replicating fused deposition modeling printer using granules

Also Published As

Publication number Publication date
JP2009041161A (ja) 2009-02-26
WO2009022636A1 (ja) 2009-02-19
TW200932995A (en) 2009-08-01
CL2008002325A1 (es) 2009-06-05

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ICHIKAWA CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OGIWARA, YASUYUKI;REEL/FRAME:023960/0367

Effective date: 20100120

STCB Information on status: application discontinuation

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