WO2007063870A1 - プレスベルト - Google Patents
プレスベルト Download PDFInfo
- Publication number
- WO2007063870A1 WO2007063870A1 PCT/JP2006/323765 JP2006323765W WO2007063870A1 WO 2007063870 A1 WO2007063870 A1 WO 2007063870A1 JP 2006323765 W JP2006323765 W JP 2006323765W WO 2007063870 A1 WO2007063870 A1 WO 2007063870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- yarn
- belt
- press
- press belt
- surface side
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0209—Wet presses with extended press nip
- D21F3/0218—Shoe presses
- D21F3/0227—Belts or sleeves therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
Definitions
- the present invention relates to a press belt used for pressurizing an object to be pressed in the paper manufacturing industry, magnetic recording medium manufacturing industry, textile industry, and the like, and more particularly, to a press belt having excellent fatigue strength. Is.
- a belt-like press object is placed on a press belt, and between one pressure member located inside the circumference of the press belt and the other pressure member located outside the circumference of the press belt.
- a belt press for pressurizing an object to be pressed is generally performed.
- the pressure member include a press roll and a pressure shoe.
- a belt press is a shrew press as a dewatering press in the paper industry.
- Shu press is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 11124788 and 2005-207000.
- a press roll as a pressurizing means located outside the circumference of the press belt and an internal pressurizing means located inside the circumference of the press roll
- a pressure treatment is performed by applying a surface pressure to the press object (wet paper) placed on the outer peripheral surface of the press belt through the press belt.
- FIG. 1 is a diagram showing a cross section in the running direction of a shear press device used in the press process of a paper machine.
- the press device includes a press roll 1 as pressurizing means, a press belt 2 facing the press roll 1, and a press shoe 3 as internal pressurizing means located inside the circumference of the press belt 2. It has.
- the pressure shoe 3 is covered with the press belt 2 and the press belt 2 is assembled into a roll shape with the outer cylinder as a roll, and the press roll is constructed, but the press roll is assembled into a roll shape.
- a wet paper 5 as a press object is passed over the felt 4.
- the outer peripheral surface of the press belt 2 and the felt 4 are in direct contact.
- Lubricating oil is supplied between the press belt 2 and the pressure shoe 3 so that the press belt 2 can slide on the pressure shoe 3.
- the press roll 1 is driven to rotate, and the press belt 2 is driven to rotate while sliding on the pressure shoe 3 by the frictional force with the traveling felt 4.
- the pressure shoe 3 is pressed from the inside of the press belt 2 toward the press roll 1, and the wet paper 5 is pressed and dehydrated by the pressing force.
- the surface of the pressure shoe 3 has a concave shape corresponding to the surface of the press roll 1. For this reason, between the press roll 1 and the press belt 2, a wide-width region along the belt running direction (MD direction: machine direction) is formed. This tip region functions as a pressure dehydrating unit.
- the press belt 2 that also has an elastic material force such as a resin and a rubber usually has a reinforcing base made of a multi-woven fabric inside. As shown in Fig. 1, the press belt 2 is indented in the belt in the belt running direction during operation, so that the press belt part in this belt region always has bending stress and compression. Stress is acting simultaneously.
- FIG. 2 is a schematic cross-sectional view of the shoe press device as seen in a direction intersecting the belt running direction (CD direction: cros s direction).
- CD direction cros s direction
- both ends in the width direction of the press belt 4 are mounted on the fitting disc 6.
- the height of the pressure shoe 3 is lower than the height of the fitting disc 6. Therefore, bending in the CD direction repeatedly occurs at both ends of the CD direction-p region of the press belt 4 every time it passes through the -p region, in addition to the bending stress and compressive stress.
- Polyester monofilaments may be used as the yarns constituting the multi-woven fabric.
- This polyester monofilament has excellent properties in terms of dimensional stability, but on the other hand, it has the property of being susceptible to repeated compression. Because of that In the case of a reinforced base material using polyester monofilament on the outermost surface, a fatigue phenomenon is likely to occur in a portion passing through the nip region in a relatively short period of time.
- Cracks generated in the press belt may develop in the MD direction and CD direction of the press belt due to repeated bending stress, compressive stress, and bending acting on the opp region, and may cause leakage of lubricating oil. .
- An object of the present invention is to provide a press belt having excellent fatigue strength.
- the press belt according to the present invention is obtained by embedding a reinforcing base material such as a multi-woven fabric cloth in an elastic material.
- the reinforcing substrate includes a first yarn group extending along the belt traveling direction and a second yarn group extending across the first yarn group.
- the first yarn group includes a twist yarn located on the outermost surface side of the belt and a single yarn located on the inner surface side of the belt.
- the second yarn group includes a twist yarn located on the outermost surface side of the belt and a single yarn located on the inner surface side of the belt.
- the twisted yarn exhibits excellent resistance to bending stress and compressive stress which are supple and high in strength. Therefore, among the yarn groups extending in the MD direction and the CD direction, by using the yarn located on the outermost surface side as the twisted yarn, the reinforcing base material is superior to bending stress and compressive stress acting on the -p region. Shows resistance.
- the single yarn has strong shape fixability.
- both the yarn extending in the MD direction and the yarn extending in the CD direction are single yarns, the strength of the knot portion at the intersection is increased, and twisting of the reinforcing base material can be suppressed.
- the MD direction twisted yarn (twisted in the MD direction) and the CD direction twisted yarn (twisted in the CD direction) positioned on the outermost surface side enhance the fatigue strength of the reinforcing base material.
- the MD direction single yarn and the CD direction single yarn located on the inner surface side act to stabilize the shape of the reinforcing base material, so that a press belt with excellent fatigue strength and long life is obtained. be able to.
- at least one of the first and second yarn groups includes a multifilament between the twisted yarn and the single yarn.
- the multifilament is impregnated with a sizing agent.
- a drainage groove extending along the belt running direction is formed on the outermost surface of the elastic material.
- the press belt is, for example, a shoe press belt.
- a press belt having excellent fatigue strength can be provided.
- FIG. 1 is a diagram showing a cross section in the running direction of a shear press device used in a press process of a paper machine.
- FIG. 2 is a diagram showing a cross-section in the width direction of a shoe press device.
- FIG. 3 is a schematic cross-sectional view showing a reinforcing base material according to an embodiment of the present invention.
- FIG. 4 is a schematic sectional view showing an example of a press belt according to an embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view showing a reinforcing base material according to another embodiment of the present invention.
- the inventor of the present application evaluated the fatigue condition, crack progressability and running property of the press belt, and found the following.
- FIG. 3 schematically shows a reinforcing base material that also has a multi-woven weaving force
- FIG. 4 is a cross-sectional view schematically showing a press belt.
- the press belt according to the embodiment of the present invention is used in the paper manufacturing industry, magnetic recording medium manufacturing industry, textile industry, and the like! It is used for pressurizing the object to be pressed, and its size is, for example, about 2 to 15 m in width, 1 to 30 m in circumference, and about 2 to LOmm in thickness. Further, the press belt is typically a shoe press belt.
- the press belt includes an elastic material 20 and a reinforcing base material 10 embedded in the elastic material 20.
- the reinforcing base 10 includes a first yarn group 11, 12, 13 extending along the belt traveling direction (MD direction) and a second yarn group 14 extending along the direction intersecting the first yarn group (CD direction). , 15 and multiple woven fabrics.
- an organic fiber is preferably used as a forming material of the reinforcing substrate 10.
- the press belt is required to be flexible, but when inorganic fibers such as glass fiber are used as the reinforcing base material, the press belt becomes too hard and defects such as cracks are likely to occur. End up. Therefore, it is preferable to use organic fibers such as polyamide fibers, aromatic polyamide fibers, polyester fibers, nylon fibers, polybulol alcohol fibers, etc. as the forming material of the reinforcing substrate 10.
- a reinforcing base material containing polyester fiber is preferable in that it has excellent dimensional stability.
- the yarn 11 located on the outermost surface side of the belt is a twisted yarn (MD
- the yarns 12 and 13 located on the inner surface side of the belt are single yarns (MD direction single yarns).
- the yarn 14 located on the outermost surface side of the belt is a twisted yarn (CD direction twisted yarn) and located on the inner surface side of the belt
- the yarn 15 to be used is a single yarn (CD direction single yarn).
- the elastic material 20 for example, thermosetting polyurethane is used.
- the elastic material 20 includes, for example, a back surface layer 20a formed from the back surface side of the reinforcing base material 10, and a surface layer 20b formed from the front surface side of the reinforcing base material 10.
- the outermost surface of the elastic material 20 has a belt running direction. A large number of drainage grooves 21 extending along the line are formed. This drain 21 is not essential and can be omitted.
- the twisted yarn exhibits better fatigue strength against bending, which is supple and stronger than the single yarn.
- the single yarn is harder than the twisted yarn, so that the strength at the knot portion between the single yarns is increased and the twist of the reinforcing base material is suppressed.
- the MD direction twisted yarn 11 and the CD direction twisted yarn 14 located on the outermost surface side of the belt 14 are repeated in the force-up region. Good resistance to bending stress and compressive stress. Also, the MD direction single yarns 12, 13 and the CD direction single yarn 15 located on the inner surface side of the belt increase the strength at the knots, so that twisting of the reinforcing base material is suppressed, and press belt twisting during travel is suppressed. To do.
- the twisted yarn is, for example, two to three multifilaments having a thickness of 200d to 1500d twisted together.
- the thickness of single yarn is 0.3 to 1. Omm in diameter
- FIG. 5 schematically shows a reinforcing substrate 30 for a press belt according to another embodiment of the present invention.
- the reinforcing base material 30 is a multi-woven fabric.
- the first yarn group extending in the belt running direction consists of the MD direction twisted yarn 31 located on the outermost surface side, the MD direction single yarn 32 located on the inner side, the MD direction multifilament 33 located on the inner side, and the innermost side. Including MD single yarn 34.
- the second yarn group extending in the direction intersecting with the first yarn group includes a CD direction twisted yarn 35 located on the outermost surface side and a CD direction single yarn 36 located on the outermost surface side.
- the MD direction multifilament 33 is twisted and is fragile.
- the multifilament 33 is impregnated with a sizing agent.
- the sizing agent can eliminate air inside the multifilament by entering between the filaments constituting the multifilament. Therefore, when the press belt is manufactured using the sizing agent-impregnated multifilament 33, the generation of bubbles can be suppressed, so that the generation of pinholes can be suppressed.
- thermosetting polyurethane When a thermosetting polyurethane is used as the elastic material of the press belt, a bundling agent containing urethane-based resin or epoxy-based resin as a main component is preferable in consideration of adhesion to the elastic material.
- the elastic material is typically a back layer formed on the back side of the reinforcing base. And a surface layer formed on the surface side of the reinforcing substrate.
- the sizing agent-impregnated multifilament 33 suppresses penetration of the resin so that it is located at the boundary between the front surface layer and the back surface layer.
- MD means a yarn extending in the belt running direction
- CD means a yarn extending in the direction intersecting the belt.
- MD1 and CD1 mean yarns located on the outermost surface side of the press belt
- MD2 and CD2 mean yarns located on the inner side
- MD3 means yarn located on the innermost surface side of the press belt. Means. In all the samples, a multifilament for preventing grease was placed between MD2 and MD3.
- the reinforcing base material of Sample 1 all the yarns are polyester single yarns.
- the MD yarn (MD3) located on the innermost surface side is a single nylon yarn, and all the remaining yarns are single polyester yarns.
- the MD yarn (MD1) located on the outermost side is a polyester twisted yarn, the MD yarn (MD3) located on the innermost side is a single nylon yarn, and the remaining yarn is a single polyester yarn is there.
- the reinforcing base material of Sample 4 is an embodiment of the present invention.
- the MD yarn (MD1) located on the outermost surface side is a polyester twisted yarn
- the CD yarn (CD1) located on the outermost surface side is a polyester twisted yarn
- the innermost surface side is a single nylon yarn and the remaining yarn is a single polyester yarn.
- all the yarns are polyester twisted yarns.
- the reinforcing base material of Sample 6 is an example of the present invention.
- the MD yarn (MD1) located on the outermost surface side and the MD yarn (MD2) located on the inner side are polyester yarns, and the MD yarn located on the innermost surface side.
- (MD3) is a single nylon yarn
- CD yarn (CD1) located on the outermost side is polyester twisted yarn
- CD yarn (CD2) located on the innermost side is polyester It is a single yarn made of Tell.
- Each reinforcing base shown in Table 1 was embedded in a thermosetting polyurethane elastic material to prepare an elastic band, and this elastic band was mounted on a roll having a diameter of 350 mm to conduct a fatigue test. Specifically, the elastic band mounted on a rotatable roll was operated continuously for 7 days while applying a pressure of 50 kgZcm 2 with a metal roll rotating at a speed of 200 mZ. After the operation was completed, the elastic material of the elastic band was dissolved with dimethylformamide solvent, the reinforcing base material was taken out, and the deterioration of the MD yarn and CD yarn was visually observed. The results are shown in Table 2.
- Sample 1 and Sample 2 which are all composed of a single yarn, MD1 and CD1 on the outermost surface side are fibrillated and crushed.
- Sample 3 where MD1 was twisted and all remaining yarns were single, only CD1 was fibrillated and crushed.
- the crack propagation property was evaluated under the following conditions using a dematcher type bending tester defined in JIS K6260.
- the crack propagation property in the MD direction and the crack propagation property in the CD direction were evaluated using different test pieces.
- the size of the test piece was 20 mm wide and 150 mm long.
- the reciprocating motion was a distance of 42. Omm.
- the incision was 5 mm long and 1.7 mm deep on the outer surface of one end in the width direction at the center in the length direction of the test piece.
- each sample was cut into a 10 cm X 30 cm rectangle. One end of the rectangular sample piece was held by hand, and the sample piece was set up vertically. The shape fixability of each sample piece was evaluated based on whether or not the force of standing vertically. The results are shown in Table 4.
- the present invention can be advantageously used as a press belt having excellent fatigue strength and strong shape fixability.
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- Paper (AREA)
- Belt Conveyors (AREA)
- Woven Fabrics (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006319944A AU2006319944A1 (en) | 2005-11-30 | 2006-11-29 | Press belt |
CA002630870A CA2630870A1 (en) | 2005-11-30 | 2006-11-29 | Press belt |
JP2007547958A JP4852049B2 (ja) | 2005-11-30 | 2006-11-29 | プレスベルト |
EP06833569A EP1964967A4 (en) | 2005-11-30 | 2006-11-29 | PRESS BAND |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005346963 | 2005-11-30 | ||
JP2005-346963 | 2005-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007063870A1 true WO2007063870A1 (ja) | 2007-06-07 |
Family
ID=38092203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/323765 WO2007063870A1 (ja) | 2005-11-30 | 2006-11-29 | プレスベルト |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1964967A4 (ja) |
JP (1) | JP4852049B2 (ja) |
KR (1) | KR20080072659A (ja) |
CN (1) | CN101316961A (ja) |
AU (1) | AU2006319944A1 (ja) |
CA (1) | CA2630870A1 (ja) |
WO (1) | WO2007063870A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5571957B2 (ja) * | 2007-09-18 | 2014-08-13 | イチカワ株式会社 | 湿紙搬送用ベルト |
CN109338478A (zh) * | 2018-12-03 | 2019-02-15 | 中国农业科学院麻类研究所 | 一种苎麻剥麻装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6428874B1 (en) * | 2000-11-03 | 2002-08-06 | Albany International Corp. | Grooved long nip shoe press belt |
JP2002275780A (ja) * | 2001-03-19 | 2002-09-25 | Ichikawa Woolen Textile Co Ltd | シュープレス用ベルト |
JP2004256970A (ja) * | 2003-02-27 | 2004-09-16 | Ichikawa Woolen Textile Co Ltd | プレスフェルト |
JP2005200819A (ja) * | 2003-12-15 | 2005-07-28 | Ichikawa Woolen Textile Co Ltd | 抄紙用プレスフェルト及び抄紙用プレス装置 |
JP2005307421A (ja) * | 2004-03-26 | 2005-11-04 | Ichikawa Co Ltd | シュープレス用ベルト |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4463051B2 (ja) * | 2003-12-24 | 2010-05-12 | ヤマウチ株式会社 | プレスベルトの製造方法 |
-
2006
- 2006-11-29 KR KR1020087011625A patent/KR20080072659A/ko not_active Application Discontinuation
- 2006-11-29 EP EP06833569A patent/EP1964967A4/en not_active Withdrawn
- 2006-11-29 CA CA002630870A patent/CA2630870A1/en not_active Abandoned
- 2006-11-29 WO PCT/JP2006/323765 patent/WO2007063870A1/ja active Application Filing
- 2006-11-29 CN CNA2006800444932A patent/CN101316961A/zh active Pending
- 2006-11-29 JP JP2007547958A patent/JP4852049B2/ja not_active Expired - Fee Related
- 2006-11-29 AU AU2006319944A patent/AU2006319944A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6428874B1 (en) * | 2000-11-03 | 2002-08-06 | Albany International Corp. | Grooved long nip shoe press belt |
JP2002275780A (ja) * | 2001-03-19 | 2002-09-25 | Ichikawa Woolen Textile Co Ltd | シュープレス用ベルト |
JP2004256970A (ja) * | 2003-02-27 | 2004-09-16 | Ichikawa Woolen Textile Co Ltd | プレスフェルト |
JP2005200819A (ja) * | 2003-12-15 | 2005-07-28 | Ichikawa Woolen Textile Co Ltd | 抄紙用プレスフェルト及び抄紙用プレス装置 |
JP2005307421A (ja) * | 2004-03-26 | 2005-11-04 | Ichikawa Co Ltd | シュープレス用ベルト |
Non-Patent Citations (1)
Title |
---|
See also references of EP1964967A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5571957B2 (ja) * | 2007-09-18 | 2014-08-13 | イチカワ株式会社 | 湿紙搬送用ベルト |
CN109338478A (zh) * | 2018-12-03 | 2019-02-15 | 中国农业科学院麻类研究所 | 一种苎麻剥麻装置 |
CN109338478B (zh) * | 2018-12-03 | 2023-12-15 | 中国农业科学院麻类研究所 | 一种苎麻剥麻装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20080072659A (ko) | 2008-08-06 |
CN101316961A (zh) | 2008-12-03 |
AU2006319944A1 (en) | 2007-06-07 |
CA2630870A1 (en) | 2007-06-07 |
JPWO2007063870A1 (ja) | 2009-05-07 |
EP1964967A4 (en) | 2009-03-25 |
EP1964967A1 (en) | 2008-09-03 |
JP4852049B2 (ja) | 2012-01-11 |
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