WO2009066613A1 - 抄紙用フェルト - Google Patents
抄紙用フェルト Download PDFInfo
- Publication number
- WO2009066613A1 WO2009066613A1 PCT/JP2008/070724 JP2008070724W WO2009066613A1 WO 2009066613 A1 WO2009066613 A1 WO 2009066613A1 JP 2008070724 W JP2008070724 W JP 2008070724W WO 2009066613 A1 WO2009066613 A1 WO 2009066613A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- felt
- fiber layer
- fiber
- wet paper
- papermaking
- Prior art date
Links
Classifications
-
- 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 papermaking felt (hereinafter sometimes simply referred to as a felt) used in a papermaking machine.
- the papermaking process in a paper machine has three parts: forming, pressing, and drying. Water is continuously removed from the paper raw material in each part.
- felt is used in the press part, and when the felt on which the wet paper is placed is pressurized by the press mechanism, the moisture in the wet paper is transferred to the felt.
- the press pressurizing unit is generally constituted by a pair of press rolls or constituted by a press roll and a shoe having a shape corresponding to the peripheral surface of the press roll.
- FIG. Fig. 1 is a cross-sectional view cut along the felt transverse direction (CMD direction).
- the papermaking felt 10 is formed by laminating a wet paper side batt fiber layer 31 and a back side batt fiber layer 3 2 as a batt fiber layer on a base 20 and then flocking by needle punching or the like. .
- the base 20 is usually a woven fabric formed by weaving warps 21 and wefts 22.
- the basic functions of the felt are to squeeze water from the wet paper (water squeezing), increase the smoothness of the wet paper (smoothness), and transport the wet paper (wet paper transportability). What is being seen is the ability to squeeze water from wet paper.
- one method for solving this problem is to include a polymer elastic material in the fiber layer constituting the felt.
- a fiber constituting a felt is impregnated with an emulsion type resin and the wet paper web side is devised (see US Pat. No. 4,500,088). More specifically, the felt is formed by impregnating an emulsion type resin into the vat fiber formed on the surface of the base layer, and the wet fiber side surface of the bag fiber layer is a dense and chamois smooth surface.
- the barrier layer was formed by processing the force render so that
- ferrules in which the back fibers formed on the surface of the base layer are impregnated with resin, the felts used in the press parts of recent high-speed paper machines, especially closed draw paper machines, are felt. There was a problem with the penetration characteristics and the rewetting phenomenon in the press pressure section.
- the pressure is released at the press pressurizing section outlet, and at the same time a negative pressure is generated inside the wet paper, so that the wet paper absorbs the moisture contained in the felt, so-called re-wetting phenomenon occurs. Occur.
- the bat fiber layer contains a resin and has a high density, and a certain degree of rewetting phenomenon is suppressed.
- the felt will harden and the paper machine will not be able to fit. Therefore, some conventional felts include a resin only in the wet paper side batt fiber layer.
- the density of the back-side bat fiber layer is low, so the amount of water stored in the bat layer is large even after press-pressing, so it is used in the press part of a closed-drawer paper machine. When used, rewetting could not be suppressed.
- the object of the present invention is to maintain the felt functions such as compression recovery, water squeezing and wet paper smoothness from the initial use for a long period of time in the felt for papermaking, and also in the closed draw paper machine.
- the purpose is to provide a felt for papermaking that is flexible and easy to insert and that can suppress rewetting in the press-pressing section.
- the papermaking felt has a base, a wet paper side bag fiber layer, and a back side bag fiber layer, the wet paper side batt fiber layer is included in a polymer elastic material, and the back side
- the vat fiber layer contains molten fiber, thereby solving the above problem.
- the polymer elastic material is composed of an emulsion type resin containing one or more of urethane-based emulsion, vinyl acetate-based emulsion, styrene-butadiene-based emulsion, and acrylic-based emulsion. It is a characteristic felt for papermaking.
- the present invention is the papermaking ferrule characterized in that the molten fiber is a molten fiber containing a low melting point component having a melting point of 180 ° C. or lower.
- the felt functions such as compression recovery, water squeezing, and wet paper smoothness are maintained for a long time from the initial use when the paper felt is put in the paper machine, and the felt is also used in the closed draw paper machine. It is flexible and easy to insert, and can prevent rewetting in the pressurizing section.
- Figure 1 is a cross-sectional view showing the outline of a conventional papermaking felt.
- FIG. 2 is a cross-sectional view schematically showing a papermaking felt according to the present invention.
- FIG. 3 is a cross-sectional view showing an outline of another papermaking felt of the present invention.
- FIG. 4 is a schematic diagram of the experimental apparatus of the present invention.
- Fig. 2 is a cross-sectional view cut along the felt transverse direction (CMD direction).
- the papermaking felt 10 is a papermaking felt in which bat fibers 3 1 and 3 2 are laminated on a base body 20 and entangled and integrated by two drilling.
- the base material 20 is usually a woven fabric obtained by weaving warp yarns 21 and weft yarns 22 using a weaving machine, and the warp yarns 21 and weft yarns 2 2 are made of monofilaments such as nylon, polyester or olefin, and multifilaments.
- the structure of the woven fabric may have a single woven structure, or a multiple woven structure such as a double woven structure or a triple woven structure.
- a substrate formed by bonding with an adhesive or the like without weaving warp and weft, or a substrate such as a nonwoven fabric, a film or a resin molded body may be used.
- the batt fiber layers 3 1 and 3 2 consisting of one stable fiber are made by laminating synthetic fibers such as nylon fibers and short fibers of natural fibers such as wool, and blending fibers of different thickness and material. May be used.
- the back fiber layer is composed of a wet paper side batt fiber layer 31 and a back side batt fiber layer 32 located on the press roll or the press side of the paper machine.
- the wet paper web fiber layer 31 uses fine fibers for the wet paper web side batt fiber layer 3 1 1, while the inner fiber bag 3 1 2 uses a thin fiber. Thick fibers can be used.
- the wet paper web batt fiber layer 31 is included in the polymer elastic material.
- the back side batt fiber layer 32 is a vat fiber layer containing molten fiber.
- the wet paper side batt fiber layer 31 composed of the staple fibers 41 is included in and integrated with the polymer elastic material 50 to form the batt fiber layer 31.
- the back side fiber layer 32 is a batt fiber layer containing melted fibers.
- the wet paper side batt fiber layer 31 since the wet paper side batt fiber layer 31 is included and integrated in the polymer elastic material 50, the wet paper side batt fiber layer 31 does not move even if the felt is repeatedly compressed by the press pressure. Due to the pressure resistance effect of the elastically deformable polymer elastic material 50, voids formed in the bat fiber layer 31 remain without being crushed, so that water permeability and compression recovery are not deteriorated. Therefore, it is long from the initial use of the felt Felt functions such as compression recovery, water squeezing and wet paper smoothness can be maintained over time.
- the back side batt fiber layer 32 contains melted fibers, and the back side batt fiber layer 32 can be formed into a high density flexible layer by heat treatment of the felt. It has good properties and can suppress rewetting of the wet paper in the press-pressing section. That is, since the back side batt fiber layer 32 contains melted fibers, at least a part of the melted fibers melts and adheres to each other when heat-treated to form a three-dimensional network structure. Such a network structure is dense and dense, and can reduce the amount of water stored in the bat layer, thereby suppressing rewetting of the felt. At the same time, the network structure of the bat fiber 32 is much more flexible than the bat fiber layer 31 included in the polymer elastic material 50. As the molten fiber, a synthetic fiber made of a low melting point component having a melting point of 180 ° C. or lower, or a synthetic fiber containing a low melting point component having a melting point of 180 ° C. or lower can be used.
- the wet paper side fiber layer 31 of the felt for papermaking of the present invention exhibits functions such as compression recovery, water squeezing, wet paper smoothness, etc. from the initial use of the felt for a long time, whereas the back side
- the vat fiber layer 32 has a high density and a flexible batt fiber layer in order to exhibit the flexibility and re-wetting suppression effect necessary for felts for closed-draw paper machines.
- the paper felt of the present invention is particularly suitable for use in a high-speed closed-mouth paper machine. It has become.
- wet paper side batt fiber 31 when the wet paper side batt fiber 31 is not included in the polymer elastic material 50, deformation of the felt due to repeated compression becomes large, so that the felt water squeezability, wet paper smoothness, wet paper transportability, etc. The function cannot be maintained, which is not preferable.
- the wet paper side batt fiber 31 is included in the polymer brittle material 50, if the back side pad fiber layer 32 does not contain molten fiber, press pressing with a closed paper machine This will prevent the wet paper from exerting its re-wetting effect.
- the elastic polymer material in the present invention is urethane emulsion, vinyl acetate. It is made of an emulsion type resin containing one or more of styrene-butadiene emulsion, acrylic emulsion, and acrylic emulsion, and the solid material of the polymer elastic material is backed up by evaporation of water in the emulsion resin. In order to stabilize the emulsion type resin, it is preferable to use the emulsion type resin to which a surfactant and a viscosity modifier are added.
- the inclusion amount of the polymer elastic material is preferably 20 gZm 2 to l 50 gZm 2 in the wet paper web batt fiber layer 31. If it is less than this, the compression recovery property of the felt is maintained, and the functions such as water squeezing and wet paper smoothness cannot be maintained. Absent.
- the water of the emulsion type resin is then used. It can be formed by applying a diluent and drying.
- the molten fiber of the present invention is a molten fiber containing a low melting point component having a melting point of 180 ° C. or lower.
- the content of the molten fiber can be used in the range of 10 g / m 2 to 200 gZm 2 in the back side batt fiber layer 32. If the molten fiber content is 10 gZm 2 or less, the density of the back-side batt fiber layer 32 will be low, and the effect of suppressing rewetting in the press-pressing section required for felts for closed-draw paper machines Is not enough.
- the preferable density of the back surface bat fiber layer 32 is in the range of 0.25 g / cm 3 to 0.55 gZcm 3 .
- the molten fiber containing a low melting point component having a melting point of 180 ° C. or less is a molten fiber in which all of the components constituting the fiber are low melting point components having a melting point of 180 ° C. or less, and a part of the components constituting the fiber. Is a low melting point component with a melting point of 180 ° C or less There is.
- a core-sheath composite fiber having a high melting point component having a core melting point of 200 or more and a sheath having a low melting point component having a melting point of 180 ° C. or less can be preferably used.
- the molten fiber content in the back side batt fiber layer 32 is preferably used in the range of 10 gZm 2 to 200 g / m 2 . Since it means the amount of the low melting point component having a melting point of 180 ° C. or lower, in the case of a molten fiber in which a part of the component constituting the fiber is a low melting point component having a melting point of 180 ° C. or lower, for example, the core-sheath composite fiber In some cases, it is the amount of melted fiber converted to a low melting point component.
- polyolefin As the low melting point component having a melting point of 18 or less in the present invention, polyolefin, polyester such as polyethylene and polypropylene, and polyamide (nylon) can be used.
- Ternary copolymer nylon such as nylon 6Z66 / 610 can be used.
- the back-side batt fiber layer 32 can be heat-treated to form a high-density and flexible layer.
- the felt is formed by forming a bat fiber layer on each of the wet paper side and the back side of the base, and then the felt is stretched endlessly between a pair of rolls while running the felt.
- the molten fiber contained in the back-side batt fiber layer 32 is heated by applying hot air at a temperature higher than the melting temperature or by hot pressing the felt immediately after the hot air is applied. At least a part of the film can be melted to form a high-density flexible layer.
- the hot air temperature is preferably in the range of 160T: to 200 ° C
- the hot press temperature is preferably in the range of 140 ° C to 180 ° C.
- the basic configuration of all the felts is as follows. Substrate: weaving twisted yarns of nylon monofilament in 1/1 plain weave, basis weight 7 5 0 g / m 2
- Wet paper side batt fiber layer Nylon 6 1 7 dtex staple fiber, basis weight 5 0 0 g / m 2
- Back side pad fiber layer A fiber layer with a total basis weight of 200 gZm 2 using a mixture of 17 dtex stable fiber of the following core-sheath composite fiber and 17 dtex staple fiber of nylon 6. The content of the core-sheath composite fiber is shown in Table 1.
- Core-sheath composite fiber Synthetic fiber in which the core component is nylon 6, the sheath component is copolymer nylon 6 12 having a melting point of 140 ° C., and the weight ratio of the core component to the sheath component is 1: 1.
- a wet paper-side vat fiber layer and a back-side vat fiber layer are laminated on a substrate and entangled by kneading to form a felt. Then, a urethane emulsion (Daiichi Kogyo Seiyaku “Superflex”, a polymer elastic material) is formed. A predetermined amount was applied from the wet paper side of the felt using the water dilution solution of “)”. The coating amount (inclusion amount) of the polymer elastic material is shown in Table 1. Also, a felt was prepared by applying a polymer elastic material to both the wet paper web side and the back side of the felt (Comparative Example 4).
- the physical properties of the finished felt are listed in Table 1.
- the density (gZ cm 3 ) of the back butt layer is a value obtained by dividing the back butt basis weight (20.0 g / m 2) by the thickness of the back bat layer.
- the softness of the felt is measured on the front and back of the finished felt test piece based on the softness A method (Gurley method) described in the Japanese Industrial Standards JIS Ll 0 96 (General textile test method). In each case, the average value of 5 times is calculated and expressed as a relative value when Comparative Example 1 is 100. (table 1 )
- the experimental device in Fig. 4 consists of a pair of press rolls P (lower press is a 150 mm diameter press and the upper press is a steel roll), a guide roll 0, a cleaning device SP and a suction suction box SB. It is a device that puts felt F in the experimental device, applies constant tension to the felt, rotates the press roll, and presses it repeatedly.
- the driving conditions of the experimental equipment are: Force is 1 000 k gZcm, felt running speed is 1 500 mZ, and while running, spray fresh water from the clarifier to the felt area at 0.1 liter / m 2, and then suck in the suction suction box.
- the running test was continued for 240 hours with the felt moisture at the press inlet adjusted to 30% -constant.
- the felt compression rate and recovery rate are calculated using the following equations. In the measurement, the values immediately after the start of the experiment and the values at the end of the experiment were obtained. The compressibility and recovery rate were determined by the following formulas, which were obtained by applying a constant pressure (30 kg / cm 2 ) to felt immersed in water for 1 hour.
- Compression rate (%) (felt thickness during compression Z initial felt thickness without pressure) X100
- the rewetting suppression effect of felt was evaluated by placing a 50% wet paper web sample at the press inlet of the experimental device, and at points A (immediately after the press exit) and B (distant from the press exit). On the guide roll) and examined the effect of suppressing rewetting on the wet paper.
- the felt of the example was low at the beginning of the experiment, but it was higher than that of the comparative example just before the end of the experiment, so the compression recovery was good as a papermaking felt. Therefore, it was confirmed that the wet paper was excellent in water squeezing and its sustainability. In addition, it was confirmed that even when the wet paper after press-pressing was transported with the felt, the moisture hardly rewet from the ferrule.
- the bat fiber in the felt includes the polymer elastic material and is integrated to form the wet paper bat fiber layer, and the back bat fiber layer has a high density and softness of the molten fiber.
- the felt is easy to put in the paper machine, and even with repeated compression by the press pressure, the felt that has excellent compression recovery due to the pressure resistance effect of the polymer elastic material.
- the felt could be configured.
- the backside batt fiber layer contained more molten fiber, it was possible to construct a felt in which rewetting to the wet paper was suppressed.
- the function of the ferrule such as compression recovery, water squeezing, and wet paper smoothness is maintained from the beginning of use when the papermaking felt is put into a paper machine. Moreover, even in the closed draw paper machine, the ferrule is flexible and easy to insert, and rewetting in the press pressurizing section can be suppressed.
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008801167777A CN101868579B (zh) | 2007-11-20 | 2008-11-07 | 造纸用毛毯 |
US12/743,668 US8262862B2 (en) | 2007-11-20 | 2008-11-07 | Felt for papermaking |
CA2706976A CA2706976C (en) | 2007-11-20 | 2008-11-07 | Papermaking felt |
EP08852237.0A EP2213789B1 (en) | 2007-11-20 | 2008-11-07 | Felt for papermaking |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-300304 | 2007-11-20 | ||
JP2007300304A JP5148973B2 (ja) | 2007-11-20 | 2007-11-20 | 抄紙用フェルト |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009066613A1 true WO2009066613A1 (ja) | 2009-05-28 |
Family
ID=40667437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/070724 WO2009066613A1 (ja) | 2007-11-20 | 2008-11-07 | 抄紙用フェルト |
Country Status (7)
Country | Link |
---|---|
US (1) | US8262862B2 (ja) |
EP (1) | EP2213789B1 (ja) |
JP (1) | JP5148973B2 (ja) |
CN (1) | CN101868579B (ja) |
CA (1) | CA2706976C (ja) |
TW (1) | TW200938695A (ja) |
WO (1) | WO2009066613A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4625135B1 (ja) * | 2009-11-10 | 2011-02-02 | イチカワ株式会社 | 抄紙用プレスフェルトおよび抄紙方法 |
JP5648848B2 (ja) * | 2011-01-21 | 2015-01-07 | イチカワ株式会社 | 抄紙用プレスフェルト |
CN102440663A (zh) * | 2011-09-30 | 2012-05-09 | 江苏红运果服饰有限公司 | 一种多功能复合地毯 |
CN102828436A (zh) * | 2012-09-04 | 2012-12-19 | 应城市恒达工业用呢有限公司 | 叠层底网造纸毛毯 |
CN103397557A (zh) * | 2013-07-31 | 2013-11-20 | 海门市工业用呢厂 | 一种造纸毛毯 |
CN112342829A (zh) * | 2020-11-10 | 2021-02-09 | 苏州优莱特种织物新科技有限公司 | 一种吸水造纸毛毯制备方法 |
JP7554124B2 (ja) | 2021-01-25 | 2024-09-19 | 日本フエルト株式会社 | 製紙用フェルトの製造方法及びこの製造方法により製造された製紙用フェルト。 |
CN114960264A (zh) * | 2022-06-01 | 2022-08-30 | 江苏金呢工程织物股份有限公司 | 造纸毛毯及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4500588A (en) | 1982-10-08 | 1985-02-19 | Tamfelt Oy Ab | Conveyor felt for paper making and a method of manufacturing such a felt |
JPH03104995A (ja) * | 1989-09-19 | 1991-05-01 | Daiwabo Co Ltd | 抄紙用ニードルフェルト |
JPH08302584A (ja) * | 1995-05-04 | 1996-11-19 | Huyck Licensco Inc | 増大した接触面を有する製紙用ファブリック |
JP2004277971A (ja) * | 2003-03-19 | 2004-10-07 | Ichikawa Woolen Textile Co Ltd | 湿紙搬送用ベルト |
JP2007131986A (ja) * | 2005-11-14 | 2007-05-31 | Ichikawa Co Ltd | 湿紙搬送用ベルト |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19803493C1 (de) | 1998-01-29 | 1999-04-29 | Inventa Ag | Papiermaschinenfilz |
US6207726B1 (en) * | 1998-02-13 | 2001-03-27 | Showa Denko Kabushiki Kaisha | Photocurable prepreg composition and production method thereof |
CA2261504A1 (en) * | 1998-05-22 | 1999-11-22 | Albany International Corp. | Belts for shoe presses |
DE19854732C1 (de) | 1998-11-26 | 2000-09-14 | Inventa Ag | Kern-Mantel Bikomponentenfaser und deren Verwendung |
JP2006214058A (ja) * | 2005-02-07 | 2006-08-17 | Ichikawa Co Ltd | 抄紙搬送フェルトおよび該抄紙搬送フェルトを備えた抄紙機のプレス装置 |
JP2007009389A (ja) * | 2005-05-31 | 2007-01-18 | Ichikawa Co Ltd | スムージングプレス装置 |
JP4793718B2 (ja) * | 2005-12-26 | 2011-10-12 | イチカワ株式会社 | 抄紙用ニードルフェルト |
JP4875895B2 (ja) * | 2006-01-06 | 2012-02-15 | イチカワ株式会社 | 抄紙用プレスフェルト |
JP4958447B2 (ja) * | 2006-02-06 | 2012-06-20 | イチカワ株式会社 | 抄紙搬送フェルト |
JP4157136B2 (ja) * | 2006-02-14 | 2008-09-24 | イチカワ株式会社 | 抄紙用プレスフェルト |
JP4976740B2 (ja) * | 2006-04-11 | 2012-07-18 | イチカワ株式会社 | 抄紙用シームフェルト |
JP4213733B2 (ja) | 2006-06-08 | 2009-01-21 | イチカワ株式会社 | 抄紙用プレスフェルトの製造方法 |
JP4891826B2 (ja) * | 2007-03-30 | 2012-03-07 | イチカワ株式会社 | 抄紙用プレスフェルト |
JP5227004B2 (ja) * | 2007-11-20 | 2013-07-03 | イチカワ株式会社 | 湿紙搬送用ベルト |
JP2010065343A (ja) * | 2008-09-10 | 2010-03-25 | Ichikawa Co Ltd | 製紙用シーム付きフェルト |
-
2007
- 2007-11-20 JP JP2007300304A patent/JP5148973B2/ja active Active
-
2008
- 2008-11-07 WO PCT/JP2008/070724 patent/WO2009066613A1/ja active Application Filing
- 2008-11-07 CA CA2706976A patent/CA2706976C/en active Active
- 2008-11-07 US US12/743,668 patent/US8262862B2/en not_active Expired - Fee Related
- 2008-11-07 CN CN2008801167777A patent/CN101868579B/zh active Active
- 2008-11-07 EP EP08852237.0A patent/EP2213789B1/en active Active
- 2008-11-18 TW TW097144440A patent/TW200938695A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4500588A (en) | 1982-10-08 | 1985-02-19 | Tamfelt Oy Ab | Conveyor felt for paper making and a method of manufacturing such a felt |
JPH03104995A (ja) * | 1989-09-19 | 1991-05-01 | Daiwabo Co Ltd | 抄紙用ニードルフェルト |
JPH08302584A (ja) * | 1995-05-04 | 1996-11-19 | Huyck Licensco Inc | 増大した接触面を有する製紙用ファブリック |
JP2004277971A (ja) * | 2003-03-19 | 2004-10-07 | Ichikawa Woolen Textile Co Ltd | 湿紙搬送用ベルト |
JP2007131986A (ja) * | 2005-11-14 | 2007-05-31 | Ichikawa Co Ltd | 湿紙搬送用ベルト |
Also Published As
Publication number | Publication date |
---|---|
EP2213789A1 (en) | 2010-08-04 |
CN101868579A (zh) | 2010-10-20 |
CA2706976C (en) | 2014-04-29 |
US8262862B2 (en) | 2012-09-11 |
CN101868579B (zh) | 2012-10-31 |
JP2009127135A (ja) | 2009-06-11 |
EP2213789A4 (en) | 2013-11-20 |
EP2213789B1 (en) | 2017-10-18 |
US20100252218A1 (en) | 2010-10-07 |
JP5148973B2 (ja) | 2013-02-20 |
TW200938695A (en) | 2009-09-16 |
CA2706976A1 (en) | 2009-05-28 |
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