WO2011096131A1 - Belt base fabric for shoe press, and shoe press belt including same - Google Patents

Belt base fabric for shoe press, and shoe press belt including same Download PDF

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Publication number
WO2011096131A1
WO2011096131A1 PCT/JP2010/071933 JP2010071933W WO2011096131A1 WO 2011096131 A1 WO2011096131 A1 WO 2011096131A1 JP 2010071933 W JP2010071933 W JP 2010071933W WO 2011096131 A1 WO2011096131 A1 WO 2011096131A1
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Prior art keywords
diameter
warp
weft
base fabric
small
Prior art date
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PCT/JP2010/071933
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French (fr)
Japanese (ja)
Inventor
暁雄 中城
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日本フエルト株式会社
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Publication of WO2011096131A1 publication Critical patent/WO2011096131A1/en

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    • 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
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/41—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific twist
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/0094—Belts
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/43—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with differing diameters
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]

Definitions

  • the present invention relates to a shoe press belt base fabric and a shoe press belt using the same. More specifically, this is a shoe press belt base fabric with little dimensional change in both the warp direction and the weft direction, and a belt using this base fabric, which has excellent dimensional stability in the running direction and the width direction and maintains a stable rotational state. In addition, the present invention relates to a shoe press belt capable of suppressing the occurrence of cracks in a resin layer in which a base fabric is embedded and the progress thereof.
  • This shoe press apparatus includes a press roll and a pressure shoe having a curved surface that approximates the shape of the peripheral surface of the press roll, and wet paper running between the press roll and the pressure shoe is pressurized and pressed. Water is used (for example, refer to Patent Document 1).
  • Water is used (for example, refer to Patent Document 1).
  • the shoe press belt, the papermaking felt, and the wet paper are sequentially overlapped from the pressure shoe side. , Run and squeezed.
  • a shoe press belt including an elastic resin layer and a base fabric embedded in the resin layer runs in direct contact with the pressure shoe.
  • the above shoe press belt is an endless belt that runs continuously and is pinched between a press roll and a pressure shoe for squeezing water, so a large tensile force is always applied, particularly in the running direction. If the angle changes, a stable rotational state may not be maintained. Moreover, this dimensional change may cause a crack in the resin layer in which the base fabric is embedded.
  • at least one of the warp and the weft is provided with a base fabric layer made of a woven fabric having a filament yarn having a straight or nearly straight arrangement so that dimensional stability in the MD direction and the CD direction can be achieved.
  • a constructed shoe press blanket is known (for example, see Patent Document 2).
  • shoe press belts In addition to the above dimensional stability problems, shoe press belts usually run in the width direction perpendicular to the running direction while the central part is in contact with the pressure shoe, and both ends are not in contact with the pressure shoe. Since it runs, both ends tend to be delayed compared to the central portion, and there is a problem that cracks and blisters occur in the resin layer near the boundary between the both ends and the central portion.
  • the resin layer on the wet paper supply side of the shoe press belt may be formed using a high-hardness resin. It has been pointed out that this is likely to occur.
  • Occurrence of cracks and blisters in the resin layer is not preferable from the viewpoint of transmitting sufficient pressure for water squeezing to the wet paper.
  • lubricating oil is supplied from the pressure shoe side, but when the resin layer is cracked or swollen, etc.
  • the lubricating oil may ooze from the pressure shoe side to the wet paper web supply side, and from the viewpoint of preventing this oozing, the occurrence of cracks and swelling in the resin layer is not preferable.
  • cracks and swelling are a cause of shortening the service life of the shoe press belt.
  • a crack or the like is generated in the shoe press belt used in an exchange cycle of 100 days or more.
  • a shoe press belt that can be extended for a longer period of time and that is slow to develop even when cracks or the like occur.
  • Patent Document 1 when the base fabric is impregnated with a synthetic polymer resin and coated, all the air is removed from the base fabric by adjusting the spacing between threads in the MD direction and the CD direction, and voids are formed.
  • a resin impregnated endless belt which does not occur is described.
  • this belt it is considered that the dimensions of the belt are not sufficiently stable in view of the yarn diameter and arrangement in the MD direction and the CD direction, and further improvement in dimensional stability is required.
  • dimensional stabilization is achieved by using straight or nearly straight filament yarns, but a double or triple woven base fabric. Since it is a layer, it is considered that the dimensional stability due to the filament yarn being straight or close to straight is impaired.
  • the present invention has been made in view of the above-described conventional problems, and is a shoe press belt base fabric with little dimensional change in both the warp direction and the weft direction, and a belt using this base fabric, and the running direction and
  • An object of the present invention is to provide a shoe press belt that is excellent in dimensional stability in the width direction, maintains a stable rotational state, and suppresses the occurrence and development of cracks and swelling in a resin layer in which a base fabric is embedded.
  • the present invention is as follows. 1. A large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp are arranged in this order in the thickness direction, and are woven by the small-diameter weft entangled with the large-diameter straight warp and the small-diameter warp.
  • a belt fabric for a shoe press having a single woven structure wherein the large straight warp and the large straight weft are multifilaments made of polyester resin and have a yarn diameter of 0.3 to 1.3 mm, the small diameter warp is a polyamide resin monofilament, and the yarn diameter is 0.1 to 0.3 mm, and the small diameter weft is a polyamide resin or polyester resin multifilament or monofilament.
  • the fineness is 400 to 1500 denier
  • the yarn diameter is 0.1 to 0.3 mm.
  • Shoe press belt base fabric characterized in that it is. 2.
  • the small diameter weft is a multifilament.
  • the ratio (d 1 / d 2 ) between the yarn diameter (d 1 ) of the large straight warp and the yarn diameter (d 2 ) of the large straight weft is 1.2 to 1.8 1. Or 2.
  • the small diameter weft is continuously entangled with two or three large diameter straight warps adjacent to each other among the large diameter straight warps.
  • the small-diameter wefts are multifilaments, and 100 to 350 monofilaments having a fineness of 3 to 8 deniers are twisted together and twisted 1 to 5 times per inch.
  • the small-diameter weft is a multifilament and has a flat cross section as described above in 1.
  • the monofilament constituting the large-diameter straight warp, the large-diameter straight weft, and the small-diameter weft is resin processed.
  • a shoe press belt comprising: a shoe press belt base fabric according to any one of the above. 9. Two of the above-mentioned shoe press belt base fabrics are overlaid and embedded in the resin layer.
  • the shoe press belt base fabric of the present invention has a large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp arranged in the thickness direction, and has a large-diameter straight warp and a small-diameter. Because each weft is of a specific material, type and diameter, and when a tensile force and / or compressive force is applied, the small-diameter warp and the small-diameter weft are easily deformed. Therefore, since the stress is absorbed, deformation of the large-diameter straight warp and the large-diameter straight weft is sufficiently suppressed, and a base fabric having excellent overall dimensional stability can be obtained.
  • the small-diameter weft is a multifilament, it is more flexible, and can be sufficiently adhered particularly to a large-diameter straight warp, so that a base fabric having better dimensional stability can be obtained.
  • the ratio (d 1 / d 2 ) between the diameter (d 1 ) of the large-diameter straight warp and the diameter (d 2 ) of the large-diameter straight weft is 1.2 to 1.8
  • the warp direction in which a larger tensile force is applied is further strengthened, and a base fabric having better dimensional stability can be obtained.
  • the small-diameter wefts are continuously entangled with two or three adjacent large-diameter straight warps, the small-diameter wefts are all large-diameter straight warps.
  • a base fabric having excellent dimensional stability can be obtained.
  • the wefts of small diameter are multifilaments, 100 to 350 monofilaments with a fineness of 3 to 8 denier are twisted together, and the wefts are sufficiently flexible when twisted 1 to 5 times per inch.
  • the base fabric Since the cross section becomes flat when weaving and comes into contact with a large diameter straight warp on the surface, the base fabric should have a better dimensional stability with less dimensional change in both the warp and weft directions. Can do.
  • a base fabric having better dimensional stability with little dimensional change in both the warp direction and the weft direction is the same as above. be able to.
  • the shoe press belt of the present invention includes the resin layer and the shoe press belt base fabric of the present invention, the shoe press belt has excellent dimensional stability in the running direction and the width direction, and maintains a stable rotational state.
  • production and the progress of the crack etc. in the resin layer which embeds are suppressed.
  • both the running direction and the width direction are strengthened, the dimensional change is further suppressed, the occurrence of cracks in the resin layer and the like Since the progress is further suppressed, the belt can have a longer service life.
  • the shoe press belt base fabric of the present invention has a large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp arranged in this order in the thickness direction.
  • Single warp and small-diameter weft woven with small-diameter weft, large-diameter straight warp and large-diameter straight weft are multifilament made of polyester resin, and yarn diameter 0.3 to 1.3 mm
  • a small diameter warp is a monofilament made of polyamide resin
  • a weft diameter of 0.1 to 0.3 mm is a multifilament made of polyamide resin or polyester resin.
  • the fineness is 400 to 1500 denier
  • the yarn diameter is 0.1 to 0.3 mm.
  • This base fabric has a single woven structure, is thinner and more flexible than a base fabric with a conventional multiple woven structure, 0.8 to 2.0 mm, especially 0.8 to 1.8 mm, A thin base fabric of about 0.0 to 1.8 mm or about 0.8 to 1.5 mm can be obtained.
  • large-diameter straight warp, large-diameter straight weft, small-diameter warp, and small-diameter weft are belt base fabrics 1 for shoe presses. Are only overlapped in the thickness direction, and are not woven together.
  • the “small-diameter warp 13” is disposed on the opposite side of the large-diameter straight weft 12 from the side on which the large-diameter straight warp 11 is superimposed, and is woven with the small-diameter weft 14; Entangled.
  • the small-diameter warp 13 and the small-diameter weft 14 are woven and entangled, the small-diameter warp 13 is almost bent due to the correlation with other yarns in terms of yarn diameter and rigidity. Instead, straight or approximate form is maintained. As a result, a shoe press belt base fabric having better dimensional stability can be obtained.
  • the “small-diameter weft 14” is woven and entangled with a large-diameter straight warp 11 and a small-diameter warp 13 that are superposed with a large-diameter straight weft 12 interposed therebetween.
  • a belt base fabric for shoe press 1 having a woven structure is formed (see FIG. 1).
  • the small-diameter wefts 14 may be interwoven with the large-diameter straight warps 11 and the small-diameter warps 13 alternately (see FIG. 1). It may be continuously entangled with the adjacent large-diameter straight warp 11 (see FIG. 2).
  • the number of large-diameter straight warps 11 that are continuously entangled is not particularly limited. However, if this number is excessive, the strength of the base fabric 1 in the oblique direction may be reduced, and the dimensional stability may be impaired. Therefore, the number can be two or three, or two or three places can be provided alternately or randomly.
  • the number of large-diameter straight warps 11 that are continuously entangled is preferably two (see FIG. 2).
  • the large-diameter straight warp and large-diameter straight weft that are superimposed are multifilaments made of polyester resin, and the yarn diameter is 0.3 to 1.3 mm.
  • the polyester resin constituting the large-diameter straight warp and the large-diameter straight weft is not particularly limited, and various polyester resins obtained by reacting dicarboxylic acid and glycol can be used.
  • the dicarboxylic acid include terephthalic acid, 2,6-naphthalenedicarboxylic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, and the like.
  • glycol examples include ethylene glycol, propylene glycol, tetramethylene glycol, 1,4-cyclohexanedimethanol and the like.
  • dicarboxylic acid and glycol may be used alone or in combination of two or more.
  • polyester resin examples include polyethylene terephthalate (PET), polypropylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. These may be used alone or in combination of two or more. Further, other resins may be mixed with the polyester resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less, when the total amount of the resin is 100% by mass. .
  • Both the large diameter straight warp and the large diameter straight weft are multifilaments.
  • monofilaments are aligned in one direction and two or more multifilament yarns twisted are further twisted.
  • Multifilaments (twisted yarns) to be combined, multifilaments (single twisted yarns) in which monofilaments are aligned in one direction and twisted, and the like are mentioned.
  • spun yarns are preferable.
  • the number of multifilament yarns to be used may be two or more, and is not particularly limited. However, it is preferably 2 to 5, particularly 2 to 4.
  • the yarn diameter of the multifilament constituting the large diameter straight warp and the large diameter straight weft is 0.3 to 1.3 mm for both the large diameter straight warp and the large diameter straight weft. If the yarn diameter is within this range, a shoe press belt base fabric having sufficient strength in the warp and weft directions and little dimensional change can be obtained.
  • the yarn diameter is preferably 0.4 to 1.2 mm, particularly preferably 0.5 to 1.1 mm. If the yarn diameter is 0.3 to 1.3 mm, particularly 0.5 to 1.1 mm, the dimension A belt base fabric for shoe presses with a sufficiently small change can be obtained.
  • the diameters of the large-diameter straight warp and the large-diameter straight weft may be the same or different.
  • the warp has a larger diameter
  • the ratio of the diameter (d 1 ) of the large straight warp to the diameter (d 2 ) of the large straight weft (d 1 / d 2 ) can be from 1.2 to 1.8, in particular from 1.3 to 1.6, and can also be from 1.4 to 1.6.
  • d 1 / d 2 is 1.2 to 1.8, the warp direction to which a larger tensile force is applied is strengthened when used as a belt base fabric, and the dimensional change in the warp direction is particularly suppressed. It is done.
  • the fineness and the number of monofilaments constituting the multifilament are not particularly limited, but in the case of plied yarn, as the multifilament raw yarn, monofilaments having a fineness of 2 to 10 denier, particularly 3 to 8 denier, and further 4 to 7 denier are used.
  • 100-800 twisted yarns can be used, 100-500 yarns, especially 150-450 yarns, and 200-400 twisted yarns can be used, and 250-500 yarns can be used.
  • a twisted yarn formed by twisting 300 to 450, and further 350 to 400 may be used.
  • the twist of the monofilament yarn can be 2 to 12 times per inch, particularly 3 to 11 times, further 4 to 10 times, and 1 to 7 times, particularly 1 to 5 times, and further 2 to 2 times. It can also be 4 times.
  • the multifilament is twisted 2 to 12 times per inch, particularly 3 to 11 times, It can be 4 to 10 times, or 2 to 10 times per inch, particularly 3 to 9 times, and further 4 to 8 times.
  • the fineness of the monofilament used, the number of monofilaments to be twisted, and the number of twists per inch can be set so that the base fabric has less dimensional change in both the warp direction and the weft direction.
  • the monofilament used for the production of the multifilament may be a non-processed yarn, a processed yarn subjected to crimping processing, bulk processing, or the like, or these may be used in combination.
  • the belt is bent when passing through the pressure shoe, and a large load is applied in the warp direction, so the base fabric has excellent bending fatigue resistance. It is preferable to have the property. From this viewpoint, by using a multifilament as a large-diameter straight warp, the load applied to the warp can be dispersed, and bending fatigue can be reduced. Thereby, fibrillation and cutting of a large-diameter straight warp can be suppressed, and the occurrence of cracks and swelling in the resin layer can be suppressed.
  • the above-mentioned bending fatigue can be reduced by improving the strong elongation of large-diameter straight warp.
  • the elongation is excessively increased, the dimensional stability of the shoe press belt decreases and is stable. The rotating state may not be maintained.
  • bending fatigue is reduced by improving the strength of the yarn, if this strength is excessively increased, it may break rapidly when the limit is exceeded, and if a crack occurs in the resin layer, There is a tendency for the development speed of the to increase.
  • a large-diameter straight warp has a multi-strength having a strength at an elongation of 2.5% of 0.7 to 3.5 daN, particularly 0.8 to 3.0 daN, and further 1.0 to 2.5 daN. It is preferable to use a filament. Thereby, when a stable rotation state is maintained and a crack is generated, the progress speed can be reduced, and a shoe press belt having a longer service life can be obtained.
  • the resin layer in which the base fabric is embedded may be entirely made of the same material, and from different materials on the pressure shoe side and the wet paper supply side, with the middle portion in the thickness direction of the base fabric as a boundary. If it is made of a different material, when impregnating the uncured resin for forming one resin layer from one side of the base fabric, this resin permeates the base fabric and the other side It is not preferable that it oozes out.
  • both the large-diameter straight warp and the large-diameter straight weft are multifilaments, and if the small-diameter weft is also a multifilament, it is impregnated from one side of the base fabric.
  • the twist of the multifilament is preferably weak, and the large-diameter straight warp and weft have sufficient strength and elongation, Excessive twisting is not preferable as long as a base fabric having excellent dimensional stability can be obtained.
  • a multifilament that is not previously focused by a focusing resin or the like is used as the large diameter straight warp and weft.
  • a multifilament focused by a focusing resin or the like behaves as if it were a monofilament, and there is no effect by using the multifilament.
  • the uncured resin used for forming the resin layer is not sufficiently impregnated into the warp, and a space may be generated, which may be a potential crack source. Therefore, large-diameter straight warp and weft, particularly large-diameter straight warp, must be multifilaments that are not resin-bundled.
  • the small-diameter warp that is drawn in the same direction as the large-diameter straight warp and is superimposed on the opposite side of the large-diameter straight weft is the monofilament made of polyamide resin.
  • the yarn diameter is 0.1 to 0.3 mm.
  • the polyamide resin constituting the small-diameter warp is not particularly limited, and various polyamide resins can be used. Examples of the polyamide resin include nylon 66, nylon 6, nylon 12, nylon 11, nylon 610, nylon 612, and the like. These polyamide resins may be used alone or in combination of two or more. Further, other resins may be mixed with the polyamide resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less, when the total amount of the resin is 100% by mass. .
  • the yarn diameter of the monofilament constituting the small-diameter warp is 0.1 to 0.3 mm. If the yarn diameter is within this range, when a stress such as tensile force or compressive force is applied to the base fabric, the small-diameter warp is easily deformed, and the large-diameter straight warp and the large-diameter straight weft are not deformed. It can be suppressed. Therefore, a belt base fabric for shoe press with little dimensional change in the warp direction can be obtained.
  • the yarn diameter can be 0.12 to 0.26 mm, particularly 0.13 to 0.25 mm, and can also be 0.12 to 0.28 mm, particularly 0.14 to 0.26 mm. If the yarn diameter is 0.1 to 0.3 mm, particularly 0.13 to 0.25 mm, and 0.14 to 0.26 mm, a belt base fabric for shoe presses with a sufficiently small dimensional change can be obtained. it can.
  • Small-diameter wefts Small-diameter wefts entangled with large-diameter straight warps and small-diameter warps are multifilaments or monofilaments made of polyamide resin or polyester resin, and when they are multifilaments, the fineness is 400 to 1500 denier. In the case of a monofilament, the yarn diameter is 0.1 to 0.3 mm.
  • the small-diameter weft may be made of polyamide resin or polyester resin, but it can reduce wear caused by friction with a large-diameter straight warp made of polyester resin, and has low rigidity and flexibility compared to polyester resin. For this reason, it is preferably made of a polyamide resin that can be easily intertwined with a large diameter and a small diameter warp.
  • the polyamide resin is not particularly limited, and various polyamide resins used for the small-diameter warp can be used. Only one type of polyamide resin may be used, or two or more types may be used in combination. In addition, other resins may be mixed with the polyamide resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less when the total amount of the resin is 100% by mass. .
  • the polyester resin is not particularly limited, and various polyester resins used for the large-diameter straight warp and the large-diameter straight weft can be used.
  • This polyester resin may be used alone or in combination of two or more.
  • other resins may be mixed with the polyester resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less, when the total amount of the resin is 100% by mass. .
  • the small-diameter weft is a multifilament or monofilament, preferably a multifilament. If the small-diameter weft is multifilament, it is sufficiently flexible and has a flat cross-section when weaving, and comes into contact with the large-diameter straight warp on the surface. It is possible to obtain a base fabric having less and more excellent dimensional stability. In addition, especially when a tensile force and / or compressive force is applied in the weft direction, this small-diameter weft is easily deformed, and deformation of the large-diameter straight weft is sufficiently suppressed, so it is suitable for shoe presses with little dimensional change. It can be a belt base fabric.
  • this small-diameter weft is a multifilament
  • its fineness is 400 to 1500 denier.
  • the yarn diameter is 0.1 to 0.3 mm. If the fineness or yarn diameter is within this range, it is sufficiently flexible and can be easily entangled and woven with large and small warps.
  • the fineness is preferably 700 to 1300 denier, particularly 800 to 1200 denier, and when it is a monofilament, the yarn diameter is 0.12 to 0.28 mm, particularly 0.14 to 0.26 mm. It is preferable. If the fineness is 400 to 1500 denier, especially 800 to 1200 denier, or the yarn diameter is 0.1 to 0.3 mm, especially 0.14 to 0.26 mm, can do.
  • a twisted yarn in which 60 to 700 monofilaments having a fineness of 2 to 10 denier, particularly 3 to 8 denier, and further 4 to 7 denier are twisted can be used.
  • a twisted yarn of 350, particularly 150 to 300, more preferably 200 to 250 is twisted and is twisted 1 to 7 times, particularly 1 to 5 times, and further 2 to 4 times per inch.
  • Such a small-diameter weft is sufficiently flexible and has a flat cross section during weaving, and is in contact with a large-diameter straight warp on the surface. It is possible to obtain a base fabric having less and more excellent dimensional stability.
  • the number of meshes of the shoe press belt base fabric is not particularly limited as long as it can be a base fabric having high strength and excellent dimensional stability.
  • the number of meshes is 8 to 42 meshes / inch in the warp direction, especially 15 to 35 meshes / inch, further 20 to 30 meshes / inch, 25 to 85 meshes / inch in the weft direction, particularly 40 to 70 meshes / inch, and more It is preferably 45-60 lines / inch. If the number of meshes in the warp direction is 8 to 42 meshes / inch and the number of meshes in the weft direction is 25 to 85 meshes / inch, the belt base fabric for shoe press has sufficient strength and little dimensional change. It can be.
  • the large-diameter straight warp, the large-diameter straight weft, and the small-diameter weft are preferably resin-processed.
  • the resin By processing the resin, slippage between the respective yarns can be improved, friction can be reduced, and fibrillation and wear can be suppressed. Since the small-diameter warp is a monofilament, there is no need for resin processing.
  • Resin processing is not particularly limited as long as it can improve the sliding of the surface of the yarn and reduce abrasion due to friction with other yarns.
  • resorcin-formalin-latex liquid RFL liquid
  • the composition of the RFL solution is not particularly limited. For example, when the total amount is 100% by mass, resorcin is 0.1 to 10% by mass, formalin is 0.1 to 10% by mass, and latex is 1 to 28% by mass.
  • the RFL liquid contained is mentioned.
  • the resin can be processed by bringing the yarn into contact with the RFL liquid, and then heat-treating the RFL liquid for drying and fixing.
  • the heat treatment process includes a heat setting process and a normalizing process, and continuously conveys the yarn brought into contact with the RFL liquid on a conveying roller disposed in a heating oven having a heat setting zone and a normalizing zone. Then, drying and fixing can be performed to produce a resin-processed yarn.
  • the shoe press belt of the present invention includes a resin layer and the shoe press belt base fabric of the present invention embedded in the resin layer.
  • the shoe press belt 100 of the present invention includes resin layers 21 and 22 and a shoe press belt base fabric 1 embedded in the resin layers 21 and 22 (see FIG. 3). Moreover, although the base fabric 1 should just be embed
  • the number of base fabrics to be overlaid is not particularly limited, but is usually 2 or 3, especially 2. Accordingly, the shoe press belt 100 (see FIG. 4 in which the base fabric 1 is two sheets) can be obtained which has higher strength and less dimensional change. In this case, the plurality of base fabrics may be simply laminated, or may be bonded by needling using a bat fiber like a general felt.
  • the two base fabrics may have the same material, the number of meshes, the thickness, or the like, or may be different.
  • the base fabric on the wet paper supply side is smaller than the base fabric on the pressure shoe side, and the diameter of all the threads is small and the mesh is fine (the number of meshes is large) And it can be set as a thin base fabric.
  • the thickness of each base cloth is preferably 0.8 to 1.2 mm for the base cloth on the wet paper supply side and 1.4 to 1.8 mm for the base cloth on the pressure shoe side. .
  • it is preferable to use a specific base fabric in combination because even if a crack occurs on the pressure shoe side, the progress of the crack to the wet paper web supply side can be further suppressed.
  • the material of the resin layers 21 and 22 is not particularly limited.
  • the resin layers 21 and 22 can sufficiently withstand the tensile force and compressive force associated with running, are flexible and smoothly rotate and run, and wear due to friction with the pressure shoe. It is preferable that the material be a difficult belt.
  • the thickness of the belt is not particularly limited, but in order to obtain a belt having sufficient strength and useful life, it is preferably 3 to 8 mm, particularly 5 to 7 mm.
  • the uncured resin used for forming the resin layer is preferably a liquid resin that can be impregnated into the base fabric, and is preferably a resin having a low viscosity in order to be sufficiently impregnated.
  • a liquid resin is not particularly limited, but an uncured urethane resin is often used.
  • the urethane resin may be a one-component type or a two-component type, but is more preferably a one-component type.
  • the uncured urethane resin includes an uncured resin in which the NCO-terminated prepolymer reacts with moisture and cures, and a polyisocyanate in which an isocyanate group is protected by a protecting group. A cured resin or the like can be used.
  • the resin layer can be formed by impregnating a base fabric with these uncured resins and then curing. Further, the resin layer is formed by impregnating a base cloth with a solution obtained by dissolving a cured resin in an organic solvent, and then removing the organic solvent, and an emulsion in which the cured resin is dispersed in a medium such as water. It can also be formed by a method of impregnating and then removing the medium.
  • the method for impregnating the base fabric with the uncured resin or the above solution and emulsion is not particularly limited.
  • the base fabric may be impregnated by immersing the base fabric in the uncured resin or the above solution and emulsion.
  • the resin or the above solution and emulsion may be applied and impregnated on the base fabric by a method such as spray coating or brush coating.
  • the resin layer can be formed as follows. First, impregnate the uncured resin or the above solution and emulsion from one side of the base fabric to the middle in the thickness direction, and then supply the uncured resin etc. to the surface of the one side of the base fabric and deposit it. Then, the uncured resin is cured, or the organic solvent and the medium are removed, and a resin layer on one side is formed.
  • a plurality of base fabrics for example, two base fabrics are used in an overlapping manner, first, an uncured resin is impregnated from the surface of one base fabric to a part of the other base fabric, and then An uncured resin or the like is further supplied and deposited on the surface of one base fabric, and then the uncured resin is cured or the organic solvent and medium are removed to form a resin layer on the one base fabric side. Thereafter, the uncured resin or the like is impregnated from the surface of the other base fabric to the tip of the resin layer on the one base fabric side, and then the uncured resin or the like is further supplied and deposited on the surface of the other base fabric.
  • the uncured resin is cured, or the organic solvent and the medium are removed, and the other base fabric side resin layer is formed.
  • the uncured resin is cured, or the organic solvent and the medium are removed, and the other base fabric side resin layer is formed.
  • the uncured resin is cured, or the organic solvent and the medium are removed, and the other base fabric side resin layer is formed.
  • the resin layer may be entirely made of the same material, and is made of different materials on the pressure shoe side and the wet paper web supply side, with the middle portion in the thickness direction of the base fabric as a boundary. It may be.
  • the pressure shoe side resin layer may be formed using a soft resin with low hardness
  • the wet paper web side resin layer may be formed using a high hardness resin. preferable.
  • the ratio of the thickness (t 1 ) of the high hardness resin layer to the thickness (t 2 ) of the low hardness resin layer is not particularly limited, but it is preferable that the high hardness resin layer is thicker.
  • T 1 / t 2 is preferably 4.0 to 1.2, particularly preferably 2.0 to 1.2. When t 1 / t 2 is 4.0 to 1.2, particularly 2.0 to 1.2, the effect of the two-layer structure is sufficiently exhibited.
  • the surface of the resin layer 21 on the wet paper supply side of the shoe press belt 100 may be a flat surface.
  • a drainage groove (a drainage groove denoted by reference numeral 21a in FIGS. 3 and 4) is preferably provided.
  • the structure or the like of the shoe press device for wet paper squeezing in which the shoe press belt of the present invention is incorporated is not particularly limited, but this device is usually a press roll and a pressurization disposed opposite to the press roll.
  • a wet paper web that is provided with a shoe and travels in a pressurized state between a press roll and a pressure shoe is squeezed.
  • wet paper, papermaking felt and shoe press belt are interposed between the press roll and the pressure shoe in this order from the press roll side, and are pressed and squeezed.
  • a papermaking felt can be interposed between the press roll and the wet paper, and one or more other papermaking fabrics can be interposed as required.
  • Example 1 (Shoe press belt base fabric) Pull up 360 monofilaments of 4-5 denier PET monofilament and twist 3 times / inch to make a multifilament yarn, then draw 3 yarns together and twist 9 times / inch A large straight warp having a yarn diameter of about 0.85 mm was produced. Furthermore, 240 monofilaments of PET with a fineness of 4 to 5 denier are aligned, and a multifilament yarn is produced by twisting 9 times / inch, and then the 3 yarns are aligned, and 9 times / inch. A large straight weft having a yarn diameter of about 0.65 mm was produced by twisting. In addition, the multifilament yarn used for the production of the large-diameter straight weft was twisted 3 times / inch and used as a small-diameter weft (fineness 1000 denier).
  • a nylon 6 monofilament having a diameter of 0.15 mm is used as a small-diameter warp, and is aligned at a yarn density of 12 / inch, and the above-mentioned large-diameter straight weft is 28 / inch on the upper surface.
  • the above-mentioned large-diameter straight warp yarns were aligned on the upper surface at a density of 12 yarns / inch.
  • a shoe press belt base fabric (see base fabric 1 in FIG. 1) having a mesh number of 24 in the warp direction / inch and a mesh number of 56 in the weft direction / inch was manufactured.
  • Example 2 A straight warp having a large diameter of about 0.85 mm was obtained in the same manner as in Example 1 except that a multifilament yarn was produced by twisting 8.6 turns / inch to the aligned PET monofilament. Produced. Further, in the same manner as in Example 1, a large-diameter straight weft having a yarn diameter of about 0.65 mm and a small-diameter weft having a fineness of 1000 denier were produced. Thereafter, as in Example 1, a nylon 6 monofilament having a yarn diameter of 0.15 mm was used as a small-diameter warp, and the same operation as in Example 1 was performed to provide a single woven structure and the number of meshes in the warp direction. A belt substrate fabric for shoe presses having 24 lines / inch and 56 meshes / inch in the weft direction was manufactured.
  • Example 3 (Shoe press belt) Two pieces of 1.6 mm thick belt belts for shoe press produced in Example 1 were overlapped, and from the surface of one of the base fabrics on the pressure shoe side, a liquid non-containing NCO-terminated urethane prepolymer was obtained. A cured resin is applied by spraying and impregnated to the middle part of the other base fabric to form an uncured resin layer. Then, the prepolymer is reacted and cured, and a pressure shoe having a thickness of 3.4 mm and a low hardness. A side resin layer (see resin layer 22 in FIG. 4) was formed.
  • a liquid uncured resin containing an NCO-terminated urethane prepolymer is spray-applied from the surface of the other base fabric on the wet paper feed side of the superimposed shoe press belt base fabric, and the pressure shoe side
  • the resin layer is impregnated up to the tip of the resin layer to form an uncured resin layer, and then the prepolymer is reacted and cured to provide a 2.6 mm thick hard paper web-side resin layer (see FIG. 4).
  • Resin layer 21) was formed.
  • a shoe press belt see belt 100 in FIG. 4 in which two base fabrics with a total thickness of about 3 mm were embedded in the middle part of the resin layer with a total thickness of 6.0 mm was manufactured.
  • Example 4 Two pieces of 1.6 mm thick belt belts for shoe press produced in Example 2 were overlapped, and in the same manner as in Example 3, the same configuration with the intermediate part of the resin layer with a total thickness of 6.0 mm A shoe press belt in which two base fabrics having a total thickness of about 3 mm were embedded was manufactured.
  • Comparative Example 1 base fabric and shoe press belt 5 using the conventional shoe press belt base fabric 3 having the warp quadruple weave structure shown in FIG. 5 and having a warp direction mesh number of 68 / inch and a weft direction mesh number of 56 / inch. Similarly, a resin layer was formed to produce a shoe press belt.
  • the first layer warp 311 (felt side) of the base fabric 3 is a twisted yarn obtained by twisting three PET multifilaments having a fineness of 500 denier
  • the second layer warp 312 is a PET monofilament having a yarn diameter of 0.35 mm
  • the third layer warp 313 is a PET multifilament having a fineness of 3000 denier
  • the fourth layer warp 314 (shoe side) is a nylon monofilament having a yarn diameter of 0.35 mm.
  • 322 is a PET monofilament having a yarn diameter of 0.40 mm.
  • each of the shoe press belts 100 manufactured in Examples 3 and 4 and the shoe press belt manufactured in Comparative Example 1 was evaluated by the following crack growth test. Using the test pieces cut out from the shoe press belts produced in Examples 3 and 4 and Comparative Example 1, crack progress was evaluated under the following test conditions using a dematcher type bending tester defined in JIS K6260. Dimension of test piece: width 20 mm, length 150 mm Reciprocating motion: Maximum distance 80.5 mm, Minimum distance 38.5 mm, Movement distance 42.0 mm Incision; Length 3 mm, depth 1.5 mm (outer surface of one end in the width direction at the center in the length direction of the test piece) (This notch simulates a crack in the belt.) Number of bends: 1000 times
  • the shoe press belt manufactured in Example 3 had a notch size of 3.5 mm after bending, that is, the crack progress was 0.5 mm, and was manufactured in Example 4.
  • the incision size after bending is 3.6 mm, that is, the crack progress is 0.6 mm, and it can be seen that in both Examples 3 and 4, it is difficult for the crack to progress.
  • the notch size after bending is 4.0 mm or more, that is, the crack progress is 1.0 mm or more, and it can be seen that the crack easily develops.
  • the shoe press belt base fabric of the present invention can be used as a shoe press belt base fabric used by being mounted on various wet paper squeezing shoe press devices constituting a press part of a paper machine. Further, the shoe press belt of the present invention can be used as a shoe press belt mounted on a shoe press device having various structures for squeezing wet paper in a paper machine.

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Abstract

Provided are a belt base fabric for shoe presses which is excellent in terms of dimensional stability, etc., and a shoe press belt which comprises a resin layer and the belt base fabric embedded therein and which is less apt to generate cracks or the like. The belt base fabric comprises a single-layer weave in which a large-diameter straight warp (11), a large-diameter straight weft (12), and a small-diameter warp (13) have been disposed in this order in the thickness direction and which has been woven with a small-diameter weft (14) that interlaces with the large-diameter straight warp and the small-diameter warp. The large-diameter straight warp and weft are multifilament yarns which are constituted of a polyester resin and have a diameter of 0.3-1.3 mm. The small-diameter warp is monofilament yarns which are constituted of a polyamide resin and have a diameter of 0.1-0.3 mm. The small-diameter weft is multifilament or monofilament yarns which are constituted of a polyamide resin or polyester resin, the multifilament yarns having a fineness of 400-1,500 deniers and the monofilament yarns having a diameter of 0.1-0.3 mm.

Description

シュープレス用ベルト基布及びこれを用いたシュープレス用ベルトShoe press belt base fabric and shoe press belt using the same
　本発明は、シュープレス用ベルト基布及びこれを用いたシュープレス用ベルトに関する。更に詳しくは、経方向及び緯方向ともに寸法変化の少ないシュープレス用ベルト基布、及びこの基布を用いたベルトであり、走行方向及び幅方向の寸法安定性に優れ、安定な回転状態が維持され、基布が埋設される樹脂層におけるクラックの発生及びその進展が抑えられるシュープレス用ベルトに関する。 The present invention relates to a shoe press belt base fabric and a shoe press belt using the same. More specifically, this is a shoe press belt base fabric with little dimensional change in both the warp direction and the weft direction, and a belt using this base fabric, which has excellent dimensional stability in the running direction and the width direction and maintains a stable rotational state. In addition, the present invention relates to a shoe press belt capable of suppressing the occurrence of cracks in a resin layer in which a base fabric is embedded and the progress thereof.
　近年、抄紙機において湿紙を搾水するプレスパートでは、加圧シューを用いたシュープレス装置が利用されている。このシュープレス装置は、プレスロールと、プレスロールの周面形状に近似した湾曲面を有する加圧シューとを備え、プレスロールと加圧シューとの間を走行する湿紙が加圧され、搾水される（例えば、特許文献１参照。）。この際、通常、湿紙のみがプレスロールと加圧シューとの間を走行するのではなく、例えば、加圧シュー側から、シュープレス用ベルト、製紙用フェルト及び湿紙が順に重なった状態で、走行し、搾水される。これらのうち、弾性を有する樹脂層と、この樹脂層に埋設された基布とを備えるシュープレス用ベルトが、加圧シューに直接接触して走行する。 In recent years, a shoe press device using a pressure shoe has been used in a press part that squeezes wet paper in a paper machine. This shoe press apparatus includes a press roll and a pressure shoe having a curved surface that approximates the shape of the peripheral surface of the press roll, and wet paper running between the press roll and the pressure shoe is pressurized and pressed. Water is used (for example, refer to Patent Document 1). At this time, normally, only the wet paper does not travel between the press roll and the pressure shoe, but, for example, the shoe press belt, the papermaking felt, and the wet paper are sequentially overlapped from the pressure shoe side. , Run and squeezed. Of these, a shoe press belt including an elastic resin layer and a base fabric embedded in the resin layer runs in direct contact with the pressure shoe.
　上記のシュープレス用ベルトは連続的に走行するエンドレスベルトであり、搾水のためプレスロールと加圧シューの間に挟持されるため、特に走行方向には常に大きな引張力が加わり、これによって寸法が変化した場合、安定な回転状態が維持されないことがある。また、この寸法変化により、基布が埋設されている樹脂層にクラックが生じることもある。このような寸法変化を抑えるため、経糸又は緯糸の少なくとも一方にストレート又はストレートに近い配列のフィラメント糸を持つ織布からなる基布層を備え、ＭＤ方向・ＣＤ方向の寸法安定性を図れるように構成したシュープレス用ブランケットが知られている（例えば、特許文献２参照。）。 The above shoe press belt is an endless belt that runs continuously and is pinched between a press roll and a pressure shoe for squeezing water, so a large tensile force is always applied, particularly in the running direction. If the angle changes, a stable rotational state may not be maintained. Moreover, this dimensional change may cause a crack in the resin layer in which the base fabric is embedded. In order to suppress such a dimensional change, at least one of the warp and the weft is provided with a base fabric layer made of a woven fabric having a filament yarn having a straight or nearly straight arrangement so that dimensional stability in the MD direction and the CD direction can be achieved. A constructed shoe press blanket is known (for example, see Patent Document 2).
特開平１１－２５６４９２号公報JP-A-11-256492 特開平１１－１２４７８８号公報Japanese Patent Laid-Open No. 11-124788
　前記の寸法安定性の問題に加え、シュープレス用ベルトは、通常、走行方向と直交する幅方向において、中央部は加圧シューと接触して走行し、両端部は加圧シューと接触せず走行するため、両端部は中央部と比べて走行が遅れがちとなり、両端部と中央部との境界付近において、樹脂層にクラック及び膨れ等を生じるという問題もある。特に、近年、搾水された水の排水効率を向上させるため、シュープレス用ベルトの湿紙供給側の樹脂層を、高硬度の樹脂を用いて形成することがあり、この場合、よりクラック等が生じ易いという問題が指摘されている。 In addition to the above dimensional stability problems, shoe press belts usually run in the width direction perpendicular to the running direction while the central part is in contact with the pressure shoe, and both ends are not in contact with the pressure shoe. Since it runs, both ends tend to be delayed compared to the central portion, and there is a problem that cracks and blisters occur in the resin layer near the boundary between the both ends and the central portion. In particular, in recent years, in order to improve the drainage efficiency of the squeezed water, the resin layer on the wet paper supply side of the shoe press belt may be formed using a high-hardness resin. It has been pointed out that this is likely to occur.
　上記の樹脂層におけるクラック及び膨れ等の発生は、湿紙に搾水のための十分、且つ均等な圧力を伝達するという観点で好ましいものではない。また、加圧シューとの摺動による摩擦によってシュープレス用ベルトが摩耗するのを軽減するため、加圧シュー側から潤滑油が供給されているが、樹脂層にクラック及び膨れ等を生じた場合、潤滑油が、加圧シュー側から湿紙供給側へ滲出することがあり、この滲出を防止するという観点でも、樹脂層におけるクラック及び膨れ等の発生は好ましくない。このように、クラック及び膨れは、シュープレス用ベルトの耐用日数を短縮させる一因となっており、通常、１００日以上の交換周期で用いられているシュープレス用ベルトにクラック等が生じるまでの期間をより長くすることができ、更にはクラック等が生じたときにも、その進展が遅いシュープレス用ベルトが必要とされている。 Occurrence of cracks and blisters in the resin layer is not preferable from the viewpoint of transmitting sufficient pressure for water squeezing to the wet paper. In addition, in order to reduce wear of the shoe press belt due to friction caused by sliding with the pressure shoe, lubricating oil is supplied from the pressure shoe side, but when the resin layer is cracked or swollen, etc. The lubricating oil may ooze from the pressure shoe side to the wet paper web supply side, and from the viewpoint of preventing this oozing, the occurrence of cracks and swelling in the resin layer is not preferable. As described above, cracks and swelling are a cause of shortening the service life of the shoe press belt. Normally, a crack or the like is generated in the shoe press belt used in an exchange cycle of 100 days or more. There is a need for a shoe press belt that can be extended for a longer period of time and that is slow to develop even when cracks or the like occur.
　特許文献１には、基礎布に合成重合体樹脂を含浸させ、コーティングさせるときに、ＭＤ方向及びＣＤ方向の糸の間隔等を調整することによって、基礎布から全ての空気が除去され、空隙が生じない樹脂含浸エンドレスベルトが記載されている。しかし、このベルトでは、ＭＤ方向及びＣＤ方向の糸の径及び配列からみて、ベルトの寸法が十分に安定しないことが考えられ、寸法安定性の更なる向上が必要とされる。更に、特許文献２に記載されたシュープレス用ブランケットでは、ストレート又はストレートに近い配列のフィラメント糸を用いることで、寸法安定化が図られているが、二重又は三重に織成された基布層であるため、フィラメント糸がストレート又はストレートに近いことによる寸法安定性が損なわれることが考えられる。 In Patent Document 1, when the base fabric is impregnated with a synthetic polymer resin and coated, all the air is removed from the base fabric by adjusting the spacing between threads in the MD direction and the CD direction, and voids are formed. A resin impregnated endless belt which does not occur is described. However, in this belt, it is considered that the dimensions of the belt are not sufficiently stable in view of the yarn diameter and arrangement in the MD direction and the CD direction, and further improvement in dimensional stability is required. Furthermore, in the shoe press blanket described in Patent Document 2, dimensional stabilization is achieved by using straight or nearly straight filament yarns, but a double or triple woven base fabric. Since it is a layer, it is considered that the dimensional stability due to the filament yarn being straight or close to straight is impaired.
　本発明は、上記の従来の問題点に鑑みてなされたものであり、経方向及び緯方向ともに寸法変化の少ないシュープレス用ベルト基布、及びこの基布を用いたベルトであり、走行方向及び幅方向の寸法安定性に優れ、安定な回転状態が維持され、基布が埋設される樹脂層におけるクラック及び膨れの発生及びその進展が抑えられるシュープレス用ベルトを提供することを目的とする。 The present invention has been made in view of the above-described conventional problems, and is a shoe press belt base fabric with little dimensional change in both the warp direction and the weft direction, and a belt using this base fabric, and the running direction and An object of the present invention is to provide a shoe press belt that is excellent in dimensional stability in the width direction, maintains a stable rotational state, and suppresses the occurrence and development of cracks and swelling in a resin layer in which a base fabric is embedded.
　本発明は以下のとおりである。
　１．大径のストレート経糸と、大径のストレート緯糸と、小径の経糸と、がこの順に厚さ方向に配置され、且つ該大径のストレート経糸及び該小径の経糸と交絡する小径の緯糸により織成された１重織組織を備えるシュープレス用ベルト基布であって、上記大径のストレート経糸及び上記大径のストレート緯糸は、ポリエステル樹脂製のマルチフィラメントであり、且つ糸径が０．３～１．３ｍｍ、上記小径の経糸は、ポリアミド樹脂製のモノフィラメントであり、且つ糸径が０．１～０．３ｍｍ、上記小径の緯糸は、ポリアミド樹脂製又はポリエステル樹脂製のマルチフィラメント又はモノフィラメントであり、且つマルチフィラメントである場合は繊度が４００～１５００デニール、モノフィラメントである場合は糸径が０．１～０．３ｍｍ、であることを特徴とするシュープレス用ベルト基布。
　２．上記小径の緯糸はマルチフィラメントである上記１．に記載のシュープレス用ベルト基布。
　３．上記大径のストレート経糸の糸径（ｄ１）と、上記大径のストレート緯糸の糸径（ｄ２）との比（ｄ１／ｄ２）が、１．２～１．８である上記１．又は２．に記載のシュープレス用ベルト基布。
　４．上記小径の緯糸は、上記大径のストレート経糸のうちの隣り合う２本又は３本の大径のストレート経糸と連続して交絡している上記１．乃至３．のうちのいずれか１項に記載のシュープレス用ベルト基布。
　５．上記小径の緯糸はマルチフィラメントであり、繊度３～８デニールのモノフィラメントが１００～３５０本撚り合わされてなり、１インチ当たり１～５回撚られている上記１．乃至４．のうちのいずれか１項に記載のシュープレス用ベルト基布。
　６．上記小径の緯糸はマルチフィラメントであり、横断面が扁平形状である上記１．乃至５．のうちのいずれか１項に記載のシュープレス用ベルト基布。
　７．上記大径のストレート経糸、上記大径のストレート緯糸、及び上記小径の緯糸、を構成するモノフィラメントが樹脂加工されている上記１．乃至６．のうちのいずれか１項に記載のシュープレス用ベルト基布。
　８．樹脂層と、該樹脂層に埋設されている上記１．乃至７．のうちのいずれか１項に記載のシュープレス用ベルト基布と、を備えることを特徴とするシュープレス用ベルト。
　９．２枚の上記シュープレス用ベルト基布が重ね合わされて上記樹脂層に埋設されている上記８．に記載のシュープレス用ベルト。 The present invention is as follows.
1. A large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp are arranged in this order in the thickness direction, and are woven by the small-diameter weft entangled with the large-diameter straight warp and the small-diameter warp. A belt fabric for a shoe press having a single woven structure, wherein the large straight warp and the large straight weft are multifilaments made of polyester resin and have a yarn diameter of 0.3 to 1.3 mm, the small diameter warp is a polyamide resin monofilament, and the yarn diameter is 0.1 to 0.3 mm, and the small diameter weft is a polyamide resin or polyester resin multifilament or monofilament. In the case of multifilament, the fineness is 400 to 1500 denier, and in the case of monofilament, the yarn diameter is 0.1 to 0.3 mm. Shoe press belt base fabric, characterized in that it is.
2. The small diameter weft is a multifilament. A belt base fabric for shoe press as described in 1.
3. The ratio (d 1 / d 2 ) between the yarn diameter (d 1 ) of the large straight warp and the yarn diameter (d 2 ) of the large straight weft is 1.2 to 1.8 1. Or 2. A belt base fabric for shoe press as described in 1.
4). The small diameter weft is continuously entangled with two or three large diameter straight warps adjacent to each other among the large diameter straight warps. To 3. The belt base fabric for shoe presses of any one of these.
5. The small-diameter wefts are multifilaments, and 100 to 350 monofilaments having a fineness of 3 to 8 deniers are twisted together and twisted 1 to 5 times per inch. To 4. The belt base fabric for shoe presses of any one of these.
6). The small-diameter weft is a multifilament and has a flat cross section as described above in 1. To 5. The belt base fabric for shoe presses of any one of these.
7). 1. The monofilament constituting the large-diameter straight warp, the large-diameter straight weft, and the small-diameter weft is resin processed. To 6. The belt base fabric for shoe presses of any one of these.
8). Resin layer and the above-mentioned 1. embedded in the resin layer. To 7. A shoe press belt, comprising: a shoe press belt base fabric according to any one of the above.
9. Two of the above-mentioned shoe press belt base fabrics are overlaid and embedded in the resin layer. A shoe press belt according to claim 1.
　本発明のシュープレス用ベルト基布は、厚さ方向に配置された、大径のストレート経糸と、大径のストレート緯糸と、小径の経糸と、を有し、且つ大径のストレート経糸及び小径の経糸と交絡する小径の緯糸を備え、且つ各々の糸が特定の材質、種類及び径であるため、引張力及び／又は圧縮力が加わったとき、小径の経糸及び小径の緯糸が容易に変形して応力を吸収してしまうため、大径のストレート経糸及び大径のストレート緯糸の変形が十分に抑えられ、全体として優れた寸法安定性を有する基布とすることができる。
　また、小径の緯糸がマルチフィラメントである場合は、より柔軟であり、特に大径のストレート経糸に十分に密着させることができ、より優れた寸法安定性を有する基布とすることができる。
　更に、大径のストレート経糸の糸径（ｄ１）と、大径のストレート緯糸の糸径（ｄ２）との比（ｄ１／ｄ２）が、１．２～１．８である場合は、ベルトの基布として用いたときに、より大きな引張力が加わる経方向がより強化され、より優れた寸法安定性を有する基布とすることができる。
　また、小径の緯糸が、大径のストレート経糸のうちの隣り合う２本又は３本の大径のストレート経糸と連続して交絡している場合も、小径の緯糸が、全ての大径のストレート経糸と交絡しているときと同様に、優れた寸法安定性を有する基布とすることができる。
　更に、小径の緯糸がマルチフィラメントであり、繊度３～８デニールのモノフィラメントが１００～３５０本撚り合わされてなり、１インチ当たり１～５回撚られている場合は、この緯糸が十分に柔軟であり、織成時に横断面が扁平形状になって、大径のストレート経糸と面で接触するため、経方向、緯方向ともにより寸法変化の少ない、より優れた寸法安定性を有する基布とすることができる。
　また、小径の緯糸がマルチフィラメントであり、横断面が扁平形状である場合は、上記と同様に、経方向、緯方向ともにより寸法変化の少ない、より優れた寸法安定性を有する基布とすることができる。
　更に、大径のストレート経糸、大径のストレート緯糸、及び小径の緯糸、を構成するモノフィラメントが樹脂加工されている場合は、これらの糸間、及びこれらの糸と小径の経糸との間、の摩擦が低減されるため、ベルトに用いたときに、各々の糸の摩耗を抑えることができ、フィブリル化等による強度の低下が抑えられる。 The shoe press belt base fabric of the present invention has a large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp arranged in the thickness direction, and has a large-diameter straight warp and a small-diameter. Because each weft is of a specific material, type and diameter, and when a tensile force and / or compressive force is applied, the small-diameter warp and the small-diameter weft are easily deformed. Therefore, since the stress is absorbed, deformation of the large-diameter straight warp and the large-diameter straight weft is sufficiently suppressed, and a base fabric having excellent overall dimensional stability can be obtained.
In addition, when the small-diameter weft is a multifilament, it is more flexible, and can be sufficiently adhered particularly to a large-diameter straight warp, so that a base fabric having better dimensional stability can be obtained.
Furthermore, when the ratio (d 1 / d 2 ) between the diameter (d 1 ) of the large-diameter straight warp and the diameter (d 2 ) of the large-diameter straight weft is 1.2 to 1.8 When used as a belt base fabric, the warp direction in which a larger tensile force is applied is further strengthened, and a base fabric having better dimensional stability can be obtained.
In addition, when the small-diameter wefts are continuously entangled with two or three adjacent large-diameter straight warps, the small-diameter wefts are all large-diameter straight warps. As in the case of entanglement with the warp, a base fabric having excellent dimensional stability can be obtained.
Furthermore, if the wefts of small diameter are multifilaments, 100 to 350 monofilaments with a fineness of 3 to 8 denier are twisted together, and the wefts are sufficiently flexible when twisted 1 to 5 times per inch. , Since the cross section becomes flat when weaving and comes into contact with a large diameter straight warp on the surface, the base fabric should have a better dimensional stability with less dimensional change in both the warp and weft directions. Can do.
In addition, when the small-diameter weft is a multifilament and the cross section is a flat shape, a base fabric having better dimensional stability with little dimensional change in both the warp direction and the weft direction is the same as above. be able to.
Furthermore, when monofilaments constituting large-diameter straight warps, large-diameter straight wefts, and small-diameter wefts are processed with resin, between these yarns and between these yarns and small-diameter warp yarns, Since friction is reduced, when used in a belt, wear of each yarn can be suppressed, and a decrease in strength due to fibrillation or the like can be suppressed.
　本発明のシュープレス用ベルトは、樹脂層と、本発明のシュープレス用ベルト基布と、を備えるため、走行方向及び幅方向の寸法安定性に優れ、安定な回転状態が維持され、基布が埋設される樹脂層におけるクラック等の発生及びその進展が抑えられる。
　また、２枚のシュープレス用ベルト基布が重ね合わされて樹脂層に埋設されている場合は、走行方向、幅方向ともに強化され、寸法変化がより抑えられ、樹脂層におけるクラック等の発生及びその進展もより抑えられるため、より耐用日数の長いベルトとすることができる。 Since the shoe press belt of the present invention includes the resin layer and the shoe press belt base fabric of the present invention, the shoe press belt has excellent dimensional stability in the running direction and the width direction, and maintains a stable rotational state. Generation | occurrence | production and the progress of the crack etc. in the resin layer which embeds are suppressed.
In addition, when two shoe press belt base fabrics are overlapped and embedded in the resin layer, both the running direction and the width direction are strengthened, the dimensional change is further suppressed, the occurrence of cracks in the resin layer and the like Since the progress is further suppressed, the belt can have a longer service life.
本発明のシュープレス用ベルト基布を経方向からみたときの、各々の糸の相関を説明するための模式図である。It is a schematic diagram for demonstrating the correlation of each thread | yarn when the belt base fabric for shoe presses of this invention is seen from a warp direction. 小径の緯糸が、２本の隣り合う大径のストレート経糸と連続して交絡している形態を説明するための模式図である。It is a schematic diagram for demonstrating the form in which the small diameter weft is continuously entangled with two adjacent large diameter straight warps. 本発明のシュープレス用ベルト基布が樹脂層に埋設されてなるシュープレス用ベルトの断面の模式図である。It is a schematic diagram of the cross section of the belt for shoe presses in which the belt base fabric for shoe presses of this invention is embed | buried under the resin layer. 重ね合わせられた２枚のシュープレス用ベルト基布が樹脂層に埋設されてなるシュープレス用ベルトの断面の模式図である。It is a schematic diagram of a cross section of a shoe press belt in which two superimposed shoe press belt base fabrics are embedded in a resin layer. 経４重織り組織を備える従来のシュープレス用ベルト基布を経方向からみたときの、各々の糸の相関を説明するための模式図である。It is a schematic diagram for demonstrating the correlation of each thread | yarn when the conventional shoe press belt base fabric provided with a warp four-fold weave structure is seen from the warp direction.
　１；シュープレス用ベルト基布、１１；大径のストレート経糸、１２；大径の緯糸、１３；小径の経糸、１４；小径の緯糸、１００；シュープレス用ベルト、２１、２２；樹脂層、２１ａ；排水溝、３；従来の基布、３１１；第１層経糸、３１２；第２層経糸、３１３；第３層経糸、３１４；第４層経糸、３２１；第１層緯糸、３２２；第２層緯糸。 DESCRIPTION OF SYMBOLS 1; Shoe-press belt base fabric, 11; Large-diameter straight warp, 12; Large-diameter weft, 13; Small-diameter warp, 14; Small-diameter weft, 100; Shoe-press belt, 21, 22; 21a; drainage groove, 3; conventional base fabric, 311; first layer warp, 312; second layer warp, 313; third layer warp, 314; fourth layer warp, 321; first layer weft, 322; 2-layer weft.
　以下、本発明を図を参照しながら詳しく説明する。
［１］シュープレス用ベルト基布
　本発明のシュープレス用ベルト基布は、大径のストレート経糸、大径のストレート緯糸、及び小径の経糸、がこの順に厚さ方向に配置され、且つ大径のストレート経糸及び小径の経糸と交絡する小径の緯糸により織成された１重織組織を備え、大径のストレート経糸及び大径のストレート緯糸が、ポリエステル樹脂製のマルチフィラメントであり、且つ糸径が０．３～１．３ｍｍ、小径の経糸が、ポリアミド樹脂製のモノフィラメントであり、且つ糸径が０．１～０．３ｍｍ、小径の緯糸が、ポリアミド樹脂製又はポリエステル樹脂製のマルチフィラメント又はモノフィラメントであり、且つマルチフィラメントである場合は繊度が４００～１５００デニール、モノフィラメントである場合は糸径が０．１～０．３ｍｍ、である。
　この基布は、１重織組織を備え、従来の多重織組織を備える基布と比べて薄く、且つ柔軟であり、０．８～２．０ｍｍ、特に０．８～１．８ｍｍ、更に１．０～１．８ｍｍ程度、また、０．８～１．５ｍｍ程度の薄い基布とすることができる。 Hereinafter, the present invention will be described in detail with reference to the drawings.
[1] Shoe Press Belt Base Fabric The shoe press belt base fabric of the present invention has a large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp arranged in this order in the thickness direction. Single warp and small-diameter weft woven with small-diameter weft, large-diameter straight warp and large-diameter straight weft are multifilament made of polyester resin, and yarn diameter 0.3 to 1.3 mm, a small diameter warp is a monofilament made of polyamide resin, and a weft diameter of 0.1 to 0.3 mm is a multifilament made of polyamide resin or polyester resin. In the case of monofilament and multifilament, the fineness is 400 to 1500 denier, and in the case of monofilament, the yarn diameter is 0.1 to 0.3 mm.
This base fabric has a single woven structure, is thinner and more flexible than a base fabric with a conventional multiple woven structure, 0.8 to 2.0 mm, especially 0.8 to 1.8 mm, A thin base fabric of about 0.0 to 1.8 mm or about 0.8 to 1.5 mm can be obtained.
（１）大径のストレート経糸、大径のストレート緯糸、小径の経糸及び小径の緯糸
　上記「大径のストレート経糸１１」及び上記「大径のストレート緯糸１２」は、シュープレス用ベルト基布１の厚さ方向に重ね合わせられているのみであり、互いに織成はされていない。また、上記「小径の経糸１３」は、大径のストレート緯糸１２の、大径のストレート経糸１１が重ね合わせられている側とは反対側に配設され、小径の緯糸１４と織成され、交絡している。このように、小径の経糸１３と小径の緯糸１４とは織成され、交絡しているが、糸径及び剛性等の面での他の糸との相関で、小径の経糸１３は殆ど屈曲せず、ストレート乃至それに近似の形態が維持される。これによって、より優れた寸法安定性を有するシュープレス用ベルト基布とすることができる。 (1) Large-diameter straight warp, large-diameter straight weft, small-diameter warp, and small-diameter weft The above-mentioned “large-diameter straight warp 11” and “large-diameter straight weft 12” are belt base fabrics 1 for shoe presses. Are only overlapped in the thickness direction, and are not woven together. The “small-diameter warp 13” is disposed on the opposite side of the large-diameter straight weft 12 from the side on which the large-diameter straight warp 11 is superimposed, and is woven with the small-diameter weft 14; Entangled. Thus, although the small-diameter warp 13 and the small-diameter weft 14 are woven and entangled, the small-diameter warp 13 is almost bent due to the correlation with other yarns in terms of yarn diameter and rigidity. Instead, straight or approximate form is maintained. As a result, a shoe press belt base fabric having better dimensional stability can be obtained.
　上記「小径の緯糸１４」は、大径のストレート緯糸１２を間にして重ね合わせられている大径のストレート経糸１１及び小径の経糸１３と織成され、交絡しており、これにより、１重織組織を有するシュープレス用ベルト基布１が形成されている（図１参照）。この場合、小径の緯糸１４は、全ての大径のストレート経糸１１及び小径の経糸１３の各々と交互に交絡して織成されていてもよく（図１参照）、大径のストレート経糸１１のうちの隣り合う大径のストレート経糸１１と連続して交絡していてもよい（図２参照）。連続して交絡する大径のストレート経糸１１の本数は特に限定されないが、この本数が過多であると、基布１の斜め方向の強度が低下し、寸法安定性が損なわれることがある。そのため、本数は２本又は３本、若しくは２本の箇所と３本の箇所とが交互に又はランダムに設けられる、等の形態とすることができる。この連続して交絡する大径のストレート経糸１１の本数は特に２本（図２参照）であることが好ましい。 The “small-diameter weft 14” is woven and entangled with a large-diameter straight warp 11 and a small-diameter warp 13 that are superposed with a large-diameter straight weft 12 interposed therebetween. A belt base fabric for shoe press 1 having a woven structure is formed (see FIG. 1). In this case, the small-diameter wefts 14 may be interwoven with the large-diameter straight warps 11 and the small-diameter warps 13 alternately (see FIG. 1). It may be continuously entangled with the adjacent large-diameter straight warp 11 (see FIG. 2). The number of large-diameter straight warps 11 that are continuously entangled is not particularly limited. However, if this number is excessive, the strength of the base fabric 1 in the oblique direction may be reduced, and the dimensional stability may be impaired. Therefore, the number can be two or three, or two or three places can be provided alternately or randomly. The number of large-diameter straight warps 11 that are continuously entangled is preferably two (see FIG. 2).
　重ね合わせられている大径のストレート経糸及び大径のストレート緯糸は、ポリエステル樹脂製のマルチフィラメントであり、糸径は０．３～１．３ｍｍである。
　大径のストレート経糸及び大径のストレート緯糸を構成するポリエステル樹脂は特に限定されず、ジカルボン酸とグリコールとを反応させてなる各種のポリエステル樹脂を用いることができる。ジカルボン酸としては、テレフタル酸、２，６－ナフタレンジカルボン酸、イソフタル酸、１，４－シクロヘキサンジカルボン酸等が挙げられる。また、グリコールとしては、エチレングリコール、プロピレングリコール、テトラメチレングリコール、１，４－シクロヘキサンジメタノール等が挙げられる。ジカルボン酸及びグリコールは各々１種のみ用いてもよく、２種以上を併用してもよい。 The large-diameter straight warp and large-diameter straight weft that are superimposed are multifilaments made of polyester resin, and the yarn diameter is 0.3 to 1.3 mm.
The polyester resin constituting the large-diameter straight warp and the large-diameter straight weft is not particularly limited, and various polyester resins obtained by reacting dicarboxylic acid and glycol can be used. Examples of the dicarboxylic acid include terephthalic acid, 2,6-naphthalenedicarboxylic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, and the like. Examples of the glycol include ethylene glycol, propylene glycol, tetramethylene glycol, 1,4-cyclohexanedimethanol and the like. Each of dicarboxylic acid and glycol may be used alone or in combination of two or more.
　上記のポリエステル樹脂としては、具体的には、ポリエチレンテレフタレート（ＰＥＴ）、ポリプロピレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート等が挙げられる。これらは１種のみ用いてもよく、２種以上を混合して用いることもできる。また、ポリエステル樹脂に他の樹脂を混合して用いてもよいが、他の樹脂は、樹脂の全量を１００質量％とした場合に、１０質量％以下、特に５質量％以下であることが好ましい。 Specific examples of the polyester resin include polyethylene terephthalate (PET), polypropylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. These may be used alone or in combination of two or more. Further, other resins may be mixed with the polyester resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less, when the total amount of the resin is 100% by mass. .
　大径のストレート経糸及び大径のストレート緯糸は、いずれもマルチフィラメントであるが、このマルチフィラメントとしては、モノフィラメントを一方向に引き揃え、撚りをかけた２本以上のマルチフィラメント原糸を更に撚り合わせてなるマルチフィラメント（諸撚糸）、及びモノフィラメントを一方向に引き揃え、撚りをかけてなるマルチフィラメント（片撚糸）等が挙げられ、これらのうちでは、諸撚糸が好ましい。この場合、用いるマルチフィラメント原糸の本数は２本以上であればよく、特に限定されないが、２～５本、特に２～４本であることが好ましい。 Both the large diameter straight warp and the large diameter straight weft are multifilaments. As this multifilament, monofilaments are aligned in one direction and two or more multifilament yarns twisted are further twisted. Multifilaments (twisted yarns) to be combined, multifilaments (single twisted yarns) in which monofilaments are aligned in one direction and twisted, and the like are mentioned. Of these, spun yarns are preferable. In this case, the number of multifilament yarns to be used may be two or more, and is not particularly limited. However, it is preferably 2 to 5, particularly 2 to 4.
　大径のストレート経糸及び大径のストレート緯糸を構成するマルチフィラメントの糸径は、大径のストレート経糸、大径のストレート緯糸ともに０．３～１．３ｍｍである。この範囲の糸径であれば、経方向及び緯方向に十分な強度を有し、且つ寸法変化の少ないシュープレス用ベルト基布とすることができる。この糸径は０．４～１．２ｍｍ、特に０．５～１．１ｍｍであることが好ましく、糸径が０．３～１．３ｍｍ、特に０．５～１．１ｍｍであれば、寸法変化が十分に少ないシュープレス用ベルト基布とすることができる。 The yarn diameter of the multifilament constituting the large diameter straight warp and the large diameter straight weft is 0.3 to 1.3 mm for both the large diameter straight warp and the large diameter straight weft. If the yarn diameter is within this range, a shoe press belt base fabric having sufficient strength in the warp and weft directions and little dimensional change can be obtained. The yarn diameter is preferably 0.4 to 1.2 mm, particularly preferably 0.5 to 1.1 mm. If the yarn diameter is 0.3 to 1.3 mm, particularly 0.5 to 1.1 mm, the dimension A belt base fabric for shoe presses with a sufficiently small change can be obtained.
　大径のストレート経糸と大径のストレート緯糸の各々の糸径は同じであってもよく、異なっていてもよい。糸径が異なる場合、経糸がより大径であることが好ましく、大径のストレート経糸の糸径（ｄ１）と、大径のストレート緯糸の糸径（ｄ２）との比（ｄ１／ｄ２）は、１．２～１．８、特に１．３～１．６とすることができ、１．４～１．６とすることもできる。ｄ１／ｄ２が、１．２～１．８であれば、ベルトの基布として用いたときに、より大きな引張力が加わる経方向が強化され、特に経方向の寸法変化が十分に抑えられる。 The diameters of the large-diameter straight warp and the large-diameter straight weft may be the same or different. When the yarn diameters are different, it is preferable that the warp has a larger diameter, and the ratio of the diameter (d 1 ) of the large straight warp to the diameter (d 2 ) of the large straight weft (d 1 / d 2 ) can be from 1.2 to 1.8, in particular from 1.3 to 1.6, and can also be from 1.4 to 1.6. When d 1 / d 2 is 1.2 to 1.8, the warp direction to which a larger tensile force is applied is strengthened when used as a belt base fabric, and the dimensional change in the warp direction is particularly suppressed. It is done.
　また、マルチフィラメントを構成するモノフィラメントの繊度及び本数は特に限定されないが、諸撚糸の場合、マルチフィラメント原糸としては、繊度２～１０デニール、特に３～８デニール，更に４～７デニールのモノフィラメントが、１００～８００本撚り合わされてなる撚糸を用いることができ、１００～５００本、特に１５０～４５０本、更に２００～４００本撚り合わされてなる撚糸とすることができ、また、２５０～５００本、特に３００～４５０本、更に３５０～４００本撚り合わされてなる撚糸とすることもできる。更に、モノフィラメント原糸の撚りは、１インチ当たり２～１２回、特に３～１１回、更に４～１０回とすることができ、また、１～７回、特に１～５回、更に２～４回とすることもできる。また、２～５本、特に２～４本のマルチフィラメント原糸を更に撚り合わせてマルチフィラメントを製造する場合、マルチフィラメントの撚りは、１インチ当たり２～１２回、特に３～１１回、更に４～１０回とすることができ、また、１インチ当たり２～１０回、特に３～９回、更に４～８回とすることもできる。 Further, the fineness and the number of monofilaments constituting the multifilament are not particularly limited, but in the case of plied yarn, as the multifilament raw yarn, monofilaments having a fineness of 2 to 10 denier, particularly 3 to 8 denier, and further 4 to 7 denier are used. 100-800 twisted yarns can be used, 100-500 yarns, especially 150-450 yarns, and 200-400 twisted yarns can be used, and 250-500 yarns can be used. In particular, a twisted yarn formed by twisting 300 to 450, and further 350 to 400 may be used. Further, the twist of the monofilament yarn can be 2 to 12 times per inch, particularly 3 to 11 times, further 4 to 10 times, and 1 to 7 times, particularly 1 to 5 times, and further 2 to 2 times. It can also be 4 times. When a multifilament is produced by further twisting 2 to 5, particularly 2 to 4 multifilament yarns, the multifilament is twisted 2 to 12 times per inch, particularly 3 to 11 times, It can be 4 to 10 times, or 2 to 10 times per inch, particularly 3 to 9 times, and further 4 to 8 times.
　更に、片撚糸の場合、用いるモノフィラメントの繊度、撚り合わされるモノフィラメントの本数、及び１インチ当たりの撚りの回数は、経方向及び緯方向ともにより寸法変化の少ない基布となるように設定することが好ましい。
　尚、マルチフィラメントの製造に用いるモノフィラメントは、非加工糸でもよく、捲縮加工及び嵩高加工等を施した加工糸でもよく、これらを併用してもよい。 Furthermore, in the case of single twisted yarn, the fineness of the monofilament used, the number of monofilaments to be twisted, and the number of twists per inch can be set so that the base fabric has less dimensional change in both the warp direction and the weft direction. preferable.
The monofilament used for the production of the multifilament may be a non-processed yarn, a processed yarn subjected to crimping processing, bulk processing, or the like, or these may be used in combination.
　また、このシュープレス用ベルト基布を用いてなるシュープレス用ベルトでは、加圧シューを通過するときに、ベルトが屈曲され、経方向に大きな負荷が加わるため、基布は優れた耐屈曲疲労性を有していることが好ましい。この観点で、大径のストレート経糸としてマルチフィラメントを用いることにより、この経糸に加わる負荷を分散させることができ、屈曲疲労を軽減させることができる。これにより、大径のストレート経糸のフィブリル化及び切断を抑制することができ、樹脂層におけるクラック及び膨れ等の発生を抑えることができる。 Further, in the shoe press belt using the shoe press belt base fabric, the belt is bent when passing through the pressure shoe, and a large load is applied in the warp direction, so the base fabric has excellent bending fatigue resistance. It is preferable to have the property. From this viewpoint, by using a multifilament as a large-diameter straight warp, the load applied to the warp can be dispersed, and bending fatigue can be reduced. Thereby, fibrillation and cutting of a large-diameter straight warp can be suppressed, and the occurrence of cracks and swelling in the resin layer can be suppressed.
　上記の屈曲疲労は、大径のストレート経糸の強伸度を向上させることで軽減することができるが、伸度を過度に大きくした場合、シュープレス用ベルトの寸法安定性が低下し、安定な回転状態が維持されないことがある。一方、屈曲疲労を、糸の強度を向上させることにより軽減させる場合、この強度を過度に大きくすると、限界を超えたときに急激に破断することがあり、樹脂層にクラックを生じた場合、クラックの進展速度が大きくなる傾向がある。このような観点で、大径のストレート経糸としては、伸度２．５％における強度が０．７～３．５ｄａＮ、特に０．８～３．０ｄａＮ、更に１．０～２．５ｄａＮのマルチフィラメントを用いることが好ましい。これにより、安定な回転状態が維持され、クラックを生じた場合に、その進展速度を低下させることができ、より耐用日数の長いシュープレス用ベルトとすることができる。 The above-mentioned bending fatigue can be reduced by improving the strong elongation of large-diameter straight warp. However, when the elongation is excessively increased, the dimensional stability of the shoe press belt decreases and is stable. The rotating state may not be maintained. On the other hand, when bending fatigue is reduced by improving the strength of the yarn, if this strength is excessively increased, it may break rapidly when the limit is exceeded, and if a crack occurs in the resin layer, There is a tendency for the development speed of the to increase. From this point of view, a large-diameter straight warp has a multi-strength having a strength at an elongation of 2.5% of 0.7 to 3.5 daN, particularly 0.8 to 3.0 daN, and further 1.0 to 2.5 daN. It is preferable to use a filament. Thereby, when a stable rotation state is maintained and a crack is generated, the progress speed can be reduced, and a shoe press belt having a longer service life can be obtained.
　更に、基布が埋設される樹脂層は、全体が同材質からなっていてもよく、基布の厚さ方向の中間部を境界として、加圧シュー側と湿紙供給側とで異なる材質からなっていてもよいが、異なる材質からなる場合、基布の一面側から一方の樹脂層を形成するための未硬化の樹脂を含浸させる際に、この樹脂が基布を透過し、他面側に滲出してしまうのは好ましくない。本発明のシュープレス用ベルト基布では、大径のストレート経糸及び大径のストレート緯糸がともにマルチフィラメントであり、更には小径の緯糸もマルチフィラメントであれば、基布の一面側から含浸された未硬化の樹脂の他面側への滲出が十分に抑えられる。また、未硬化の樹脂の基布の他面側への滲出を抑えるためには、マルチフィラメントの撚りは弱いことが好ましく、大径のストレート経糸及び緯糸は、十分な強伸度を有し、優れた寸法安定性を有する基布とすることができる限り、過度に撚りをかけることは好ましくない。 Further, the resin layer in which the base fabric is embedded may be entirely made of the same material, and from different materials on the pressure shoe side and the wet paper supply side, with the middle portion in the thickness direction of the base fabric as a boundary. If it is made of a different material, when impregnating the uncured resin for forming one resin layer from one side of the base fabric, this resin permeates the base fabric and the other side It is not preferable that it oozes out. In the shoe press belt base fabric of the present invention, both the large-diameter straight warp and the large-diameter straight weft are multifilaments, and if the small-diameter weft is also a multifilament, it is impregnated from one side of the base fabric. Exudation of uncured resin to the other side is sufficiently suppressed. Further, in order to suppress the exudation of the uncured resin to the other side of the base fabric, the twist of the multifilament is preferably weak, and the large-diameter straight warp and weft have sufficient strength and elongation, Excessive twisting is not preferable as long as a base fabric having excellent dimensional stability can be obtained.
　尚、大径のストレート経糸及び緯糸、特に大径のストレート経糸としては、予め集束樹脂等によって集束されていないマルチフィラメントを用いる。集束樹脂等によって集束されたマルチフィラメントでは、モノフィラメントであるかのように挙動し、上記のマルチフィラメントを用いることによる作用効果が奏されない。また、集束されたマルチフィラメントでは、樹脂層の形成に用いられる未硬化の樹脂が経糸に十分に含浸されず、空間が生じることがあり、潜在的なクラック源となることもある。従って、大径のストレート経糸及び緯糸、特に大径のストレート経糸は、樹脂集束されてないマルチフィラメントである必要がある。 In addition, as the large diameter straight warp and weft, particularly as the large diameter straight warp, a multifilament that is not previously focused by a focusing resin or the like is used. A multifilament focused by a focusing resin or the like behaves as if it were a monofilament, and there is no effect by using the multifilament. Further, in the bundled multifilament, the uncured resin used for forming the resin layer is not sufficiently impregnated into the warp, and a space may be generated, which may be a potential crack source. Therefore, large-diameter straight warp and weft, particularly large-diameter straight warp, must be multifilaments that are not resin-bundled.
（２）小径の経糸
　大径のストレート経糸と同方向に引き揃えられ、大径のストレート緯糸の大径のストレート経糸とは反対側に重ね合わせられている小径の経糸は、ポリアミド樹脂製のモノフィラメントであり、糸径が０．１～０．３ｍｍである。
　小径の経糸を構成するポリアミド樹脂は特に限定されず、各種のポリアミド樹脂を用いることができる。このポリアミド樹脂としては、ナイロン６６、ナイロン６、ナイロン１２、ナイロン１１、ナイロン６１０、ナイロン６１２等が挙げられる。これらのポリアミド樹脂は１種のみ用いてもよく、２種以上を併用してもよい。また、ポリアミド樹脂に他の樹脂を混合して用いてもよいが、他の樹脂は、樹脂の全量を１００質量％とした場合に、１０質量％以下、特に５質量％以下であることが好ましい。 (2) Small-diameter warp The small-diameter warp that is drawn in the same direction as the large-diameter straight warp and is superimposed on the opposite side of the large-diameter straight weft is the monofilament made of polyamide resin. The yarn diameter is 0.1 to 0.3 mm.
The polyamide resin constituting the small-diameter warp is not particularly limited, and various polyamide resins can be used. Examples of the polyamide resin include nylon 66, nylon 6, nylon 12, nylon 11, nylon 610, nylon 612, and the like. These polyamide resins may be used alone or in combination of two or more. Further, other resins may be mixed with the polyamide resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less, when the total amount of the resin is 100% by mass. .
　小径の経糸を構成するモノフィラメントの糸径は、０．１～０．３ｍｍである。この範囲の糸径であれば、基布に引張力及び圧縮力等の応力が加わったときに、この小径の経糸が容易に変形し、大径のストレート経糸及び大径のストレート緯糸の変形が抑えられる。そのため、経方向における寸法変化の少ないシュープレス用ベルト基布とすることができる。この糸径は０．１２～０．２６ｍｍ、特に０．１３～０．２５ｍｍとすることができ、また、０．１２～０．２８ｍｍ、特に０．１４～０．２６ｍｍとすることもできる。この糸径が０．１～０．３ｍｍ、特に０．１３～０．２５ｍｍ、また、０．１４～０．２６ｍｍであれば、寸法変化が十分に少ないシュープレス用ベルト基布とすることができる。 The yarn diameter of the monofilament constituting the small-diameter warp is 0.1 to 0.3 mm. If the yarn diameter is within this range, when a stress such as tensile force or compressive force is applied to the base fabric, the small-diameter warp is easily deformed, and the large-diameter straight warp and the large-diameter straight weft are not deformed. It can be suppressed. Therefore, a belt base fabric for shoe press with little dimensional change in the warp direction can be obtained. The yarn diameter can be 0.12 to 0.26 mm, particularly 0.13 to 0.25 mm, and can also be 0.12 to 0.28 mm, particularly 0.14 to 0.26 mm. If the yarn diameter is 0.1 to 0.3 mm, particularly 0.13 to 0.25 mm, and 0.14 to 0.26 mm, a belt base fabric for shoe presses with a sufficiently small dimensional change can be obtained. it can.
（３）小径の緯糸
　大径のストレート経糸及び小径の経糸と交絡する小径の緯糸は、ポリアミド樹脂製又はポリエステル樹脂製のマルチフィラメント又はモノフィラメントであり、マルチフィラメントである場合は繊度が４００～１５００デニール、モノフィラメントである場合は糸径が０．１～０．３ｍｍである。
　小径の緯糸はポリアミド樹脂製でもポリエステル樹脂製でもよいが、ポリエステル樹脂製である大径のストレート経糸との摩擦による摩耗を低減させることができ、且つポリエステル樹脂と比べて剛性が低く、柔軟であるため、大径及び小径の経糸と絡合させ、織成させることが容易なポリアミド樹脂製であることが好ましい。 (3) Small-diameter wefts Small-diameter wefts entangled with large-diameter straight warps and small-diameter warps are multifilaments or monofilaments made of polyamide resin or polyester resin, and when they are multifilaments, the fineness is 400 to 1500 denier. In the case of a monofilament, the yarn diameter is 0.1 to 0.3 mm.
The small-diameter weft may be made of polyamide resin or polyester resin, but it can reduce wear caused by friction with a large-diameter straight warp made of polyester resin, and has low rigidity and flexibility compared to polyester resin. For this reason, it is preferably made of a polyamide resin that can be easily intertwined with a large diameter and a small diameter warp.
　小径の緯糸がポリアミド樹脂製である場合、このポリアミド樹脂は特に限定されず、前記の小径の経糸に用いられる各種のポリアミド樹脂を用いることができる。ポリアミド樹脂は１種のみ用いてもよく、２種以上を併用してもよい。また、ポリアミド樹脂に他の樹脂を混合して用いてもよいが、他の樹脂は、樹脂の全量を１００質量％とした場合に、１０質量％以下、特に５質量％以下であることが好ましい。 When the small-diameter weft is made of a polyamide resin, the polyamide resin is not particularly limited, and various polyamide resins used for the small-diameter warp can be used. Only one type of polyamide resin may be used, or two or more types may be used in combination. In addition, other resins may be mixed with the polyamide resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less when the total amount of the resin is 100% by mass. .
　更に、小径の緯糸がポリエステル樹脂製である場合、このポリエステル樹脂は特に限定されず、前記の大径のストレート経糸及び大径のストレート緯糸に用いられる各種のポリエステル樹脂を用いることができる。このポリエステル樹脂は１種のみ用いてもよく、２種以上を併用してもよい。また、ポリエステル樹脂に他の樹脂を混合して用いてもよいが、他の樹脂は、樹脂の全量を１００質量％とした場合に、１０質量％以下、特に５質量％以下であることが好ましい。 Furthermore, when the small-diameter weft is made of a polyester resin, the polyester resin is not particularly limited, and various polyester resins used for the large-diameter straight warp and the large-diameter straight weft can be used. This polyester resin may be used alone or in combination of two or more. Further, other resins may be mixed with the polyester resin, but the other resin is preferably 10% by mass or less, particularly preferably 5% by mass or less, when the total amount of the resin is 100% by mass. .
　小径の緯糸は、マルチフィラメント又はモノフィラメントであり、マルチフィラメントであることが好ましい。小径の緯糸がマルチフィラメントであれば、十分に柔軟であり、織成時に横断面が扁平形状になって、大径のストレート経糸と面で接触するため、経方向、緯方向ともにより寸法変化の少ない、より優れた寸法安定性を有する基布とすることができる。また、特に緯方向に引張力及び／又は圧縮力が加わったときに、この小径の緯糸が容易に変形し、大径のストレート緯糸の変形が十分に抑えられるため、寸法変化の少ないシュープレス用ベルト基布とすることができる。 The small-diameter weft is a multifilament or monofilament, preferably a multifilament. If the small-diameter weft is multifilament, it is sufficiently flexible and has a flat cross-section when weaving, and comes into contact with the large-diameter straight warp on the surface. It is possible to obtain a base fabric having less and more excellent dimensional stability. In addition, especially when a tensile force and / or compressive force is applied in the weft direction, this small-diameter weft is easily deformed, and deformation of the large-diameter straight weft is sufficiently suppressed, so it is suitable for shoe presses with little dimensional change. It can be a belt base fabric.
　この小径の緯糸がマルチフィラメントである場合、その繊度は４００～１５００デニールである。一方、モノフィラメントである場合、その糸径は０．１～０．３ｍｍである。この範囲の繊度又は糸径であれば、十分に柔軟であり、大径及び小径の経糸と容易に絡合させ、織成させることができる。マルチフィラメントであるとき、繊度は７００～１３００デニール、特に８００～１２００デニールであることが好ましく、モノフィラメントであるとき、糸径は０．１２～０．２８ｍｍ、特に０．１４～０．２６ｍｍであることが好ましい。繊度が４００～１５００デニール、特に８００～１２００デニール、又は糸径が０．１～０．３ｍｍ、特に０．１４～０．２６ｍｍであれば、寸法変化が十分に少ないシュープレス用ベルト基布とすることができる。 When this small-diameter weft is a multifilament, its fineness is 400 to 1500 denier. On the other hand, in the case of a monofilament, the yarn diameter is 0.1 to 0.3 mm. If the fineness or yarn diameter is within this range, it is sufficiently flexible and can be easily entangled and woven with large and small warps. When it is a multifilament, the fineness is preferably 700 to 1300 denier, particularly 800 to 1200 denier, and when it is a monofilament, the yarn diameter is 0.12 to 0.28 mm, particularly 0.14 to 0.26 mm. It is preferable. If the fineness is 400 to 1500 denier, especially 800 to 1200 denier, or the yarn diameter is 0.1 to 0.3 mm, especially 0.14 to 0.26 mm, can do.
　また、小径の緯糸がマルチフィラメントである場合、繊度２～１０デニール、特に３～８デニール，更に４～７デニールのモノフィラメントが、６０～７００本撚り合わされてなる撚糸を用いることができ、１００～３５０本、特に１５０～３００本、更に２００～２５０本撚り合わされてなり、１インチ当たり１～７回、特に１～５回、更に２～４回撚られている撚糸であることが好ましい。このような小径の緯糸であれば、十分に柔軟であり、織成時に横断面が扁平形状になって、大径のストレート経糸と面で接触するため、経方向、緯方向ともにより寸法変化の少ない、より優れた寸法安定性を有する基布とすることができる。 When the small-diameter weft is a multifilament, a twisted yarn in which 60 to 700 monofilaments having a fineness of 2 to 10 denier, particularly 3 to 8 denier, and further 4 to 7 denier are twisted can be used. A twisted yarn of 350, particularly 150 to 300, more preferably 200 to 250 is twisted and is twisted 1 to 7 times, particularly 1 to 5 times, and further 2 to 4 times per inch. Such a small-diameter weft is sufficiently flexible and has a flat cross section during weaving, and is in contact with a large-diameter straight warp on the surface. It is possible to obtain a base fabric having less and more excellent dimensional stability.
（４）メッシュ数
　シュープレス用ベルト基布のメッシュ数は、強度が大きく、且つ優れた寸法安定性を有する基布とすることができる限り、特に限定されない。このメッシュ数は、経方向では８～４２本／インチ、特に１５～３５本／インチ、更に２０～３０本／インチ、緯方向では２５～８５本／インチ、特に４０～７０本／インチ、更に４５～６０本／インチであることが好ましい。経方向のメッシュ数が８～４２本／インチであり、且つ緯方向のメッシュ数が２５～８５本／インチであれば、十分な強度を有し、且つ寸法変化の少ないシュープレス用ベルト基布とすることができる。 (4) Number of Meshes The number of meshes of the shoe press belt base fabric is not particularly limited as long as it can be a base fabric having high strength and excellent dimensional stability. The number of meshes is 8 to 42 meshes / inch in the warp direction, especially 15 to 35 meshes / inch, further 20 to 30 meshes / inch, 25 to 85 meshes / inch in the weft direction, particularly 40 to 70 meshes / inch, and more It is preferably 45-60 lines / inch. If the number of meshes in the warp direction is 8 to 42 meshes / inch and the number of meshes in the weft direction is 25 to 85 meshes / inch, the belt base fabric for shoe press has sufficient strength and little dimensional change. It can be.
（５）樹脂加工
　大径のストレート経糸、大径のストレート緯糸及び小径の緯糸（マルチフィラメントである場合）は、樹脂加工されていることが好ましい。樹脂加工することにより、各々の糸間の滑りが向上し、摩擦を低減させることができ、フィブリル化及び摩耗を抑えることができる。小径の経糸はモノフィラメントであるため、特に樹脂加工する必要はない。 (5) Resin processing The large-diameter straight warp, the large-diameter straight weft, and the small-diameter weft (in the case of multifilament) are preferably resin-processed. By processing the resin, slippage between the respective yarns can be improved, friction can be reduced, and fibrillation and wear can be suppressed. Since the small-diameter warp is a monofilament, there is no need for resin processing.
　樹脂加工は、糸の表面の滑りを向上させ、他の糸との摩擦による摩耗等を低減させることができればよく、加工方法は特に限定されないが、例えば、レゾルシン－ホルマリン－ラテックス液（ＲＦＬ液）を用いて加工することができる。このＲＦＬ液の組成も特に限定されないが、例えば、全量を１００質量％とした場合に、レゾルシンが０．１～１０質量％、ホルマリンが０．１～１０質量％、ラッテクスが１～２８質量％含有されるＲＦＬ液が挙げられる。 Resin processing is not particularly limited as long as it can improve the sliding of the surface of the yarn and reduce abrasion due to friction with other yarns. For example, resorcin-formalin-latex liquid (RFL liquid) Can be processed. The composition of the RFL solution is not particularly limited. For example, when the total amount is 100% by mass, resorcin is 0.1 to 10% by mass, formalin is 0.1 to 10% by mass, and latex is 1 to 28% by mass. The RFL liquid contained is mentioned.
　具体的には、糸をＲＦＬ液と接触させ、その後、ＲＦＬ液を乾燥させ、定着させるために加熱処理することにより樹脂加工することができる。加熱処理工程は、ヒートセット工程及びノルマライジング工程を備え、ヒートセットゾーンとノルマライジングゾーンとを備える加熱オーブン内に配設された搬送ローラ上を、ＲＦＬ液と接触させた糸を連続的に搬送させて、乾燥させ、定着させることにより、樹脂加工された糸を製造することができる。 Specifically, the resin can be processed by bringing the yarn into contact with the RFL liquid, and then heat-treating the RFL liquid for drying and fixing. The heat treatment process includes a heat setting process and a normalizing process, and continuously conveys the yarn brought into contact with the RFL liquid on a conveying roller disposed in a heating oven having a heat setting zone and a normalizing zone. Then, drying and fixing can be performed to produce a resin-processed yarn.
［２］製紙用ベルト
　本発明のシュープレス用ベルトは、樹脂層と、この樹脂層に埋設されている本発明のシュープレス用ベルト基布と、を備える。 [2] Papermaking Belt The shoe press belt of the present invention includes a resin layer and the shoe press belt base fabric of the present invention embedded in the resin layer.
　本発明のシュープレス用ベルト１００は、樹脂層２１、２２と、この樹脂層２１、２２に埋設されているシュープレス用ベルト基布１と、を備える（図３参照）。また、基布１は、樹脂層２１、２２に１枚埋設されておればよいが、複数枚の基布が重ね合わされて埋設されていてもよい。重ね合わされる基布の枚数は特に限定されないが、通常、２又は３枚、特に２枚である。これによって、より強度が大きく、より寸法変化の少ないシュープレス用ベルト１００（基布１が２枚である図４参照）とすることができる。この場合、複数枚の基布は単に積層されているのみでもよく、一般的なフェルトのように、バット繊維を用いてニードリングにより結合させてもよい。 The shoe press belt 100 of the present invention includes resin layers 21 and 22 and a shoe press belt base fabric 1 embedded in the resin layers 21 and 22 (see FIG. 3). Moreover, although the base fabric 1 should just be embed | buried in the resin layers 21 and 22, one piece of base fabric may be piled up and embedded. The number of base fabrics to be overlaid is not particularly limited, but is usually 2 or 3, especially 2. Accordingly, the shoe press belt 100 (see FIG. 4 in which the base fabric 1 is two sheets) can be obtained which has higher strength and less dimensional change. In this case, the plurality of base fabrics may be simply laminated, or may be bonded by needling using a bat fiber like a general felt.
　上記のように複数の基布、例えば、２枚の基布を重ね合わせて用いる場合、２枚の基布は材質、メッシュ数、厚さ等が同じでもよく、異なっていてもよい。また、異なる基布を用いるときは、湿紙供給側となる基布を、加圧シュー側となる基布と比べて、全ての糸の径が小さく、メッシュが細かく（メッシュ数が多く）、且つ薄い基布とすることができる。この場合、各々の基布の厚さは、湿紙供給側となる基布が０．８～１．２ｍｍ、加圧シュー側となる基布が１．４～１．８ｍｍであることが好ましい。このように特定の基布を組み合わせて用いることにより、加圧シュー側においてクラックが生じたとしても、湿紙供給側へのクラックの進展をより抑えることができるため好ましい。 As described above, when a plurality of base fabrics, for example, two base fabrics are used in an overlapping manner, the two base fabrics may have the same material, the number of meshes, the thickness, or the like, or may be different. In addition, when using different base fabrics, the base fabric on the wet paper supply side is smaller than the base fabric on the pressure shoe side, and the diameter of all the threads is small and the mesh is fine (the number of meshes is large) And it can be set as a thin base fabric. In this case, the thickness of each base cloth is preferably 0.8 to 1.2 mm for the base cloth on the wet paper supply side and 1.4 to 1.8 mm for the base cloth on the pressure shoe side. . Thus, it is preferable to use a specific base fabric in combination because even if a crack occurs on the pressure shoe side, the progress of the crack to the wet paper web supply side can be further suppressed.
　更に、樹脂層２１、２２の材質は特に限定されないが、走行に伴う引張力及び圧縮力に十分に耐え、柔軟であって円滑に回転、走行し、且つ加圧シューとの摩擦による摩耗を生じ難いベルトとすることができる材質であることが好ましい。また、ベルトの厚さは特に限定されないが、十分な強度と耐用日数とを有するベルトとするためには、３～８ｍｍ、特に５～７ｍｍであることが好ましい。 Furthermore, the material of the resin layers 21 and 22 is not particularly limited. However, the resin layers 21 and 22 can sufficiently withstand the tensile force and compressive force associated with running, are flexible and smoothly rotate and run, and wear due to friction with the pressure shoe. It is preferable that the material be a difficult belt. The thickness of the belt is not particularly limited, but in order to obtain a belt having sufficient strength and useful life, it is preferably 3 to 8 mm, particularly 5 to 7 mm.
　樹脂層の形成に用いる未硬化の樹脂は、基布に含浸させることができる液状の樹脂であることが好ましく、十分に含浸させるためには粘度の低い樹脂であることが好ましい。このような液状の樹脂は特に限定されないが、未硬化のウレタン樹脂が用いられることが多い。ウレタン樹脂は、１液タイプであってもよく、２液タイプであってもよいが、１液タイプであることがより好ましい。未硬化のウレタン樹脂としては、ＮＣＯ末端プレポリマーが水分と反応して硬化する未硬化樹脂、イソシアネート基が保護基によって保護されたポリイソシアネートを含有し、加熱によって保護基が解離し、硬化する未硬化樹脂等を用いることができる。樹脂層は、これらの未硬化樹脂を基布に含浸させ、その後、硬化させることにより形成することができる。更に、樹脂層は、硬化樹脂を有機溶媒に溶解させた溶液を基布に含浸させ、その後、有機溶媒を除去する方法、及び硬化樹脂を水等の媒体に分散させたエマルション、を基布に含浸させ、その後、媒体を除去する方法、によっても形成することができる。 The uncured resin used for forming the resin layer is preferably a liquid resin that can be impregnated into the base fabric, and is preferably a resin having a low viscosity in order to be sufficiently impregnated. Such a liquid resin is not particularly limited, but an uncured urethane resin is often used. The urethane resin may be a one-component type or a two-component type, but is more preferably a one-component type. The uncured urethane resin includes an uncured resin in which the NCO-terminated prepolymer reacts with moisture and cures, and a polyisocyanate in which an isocyanate group is protected by a protecting group. A cured resin or the like can be used. The resin layer can be formed by impregnating a base fabric with these uncured resins and then curing. Further, the resin layer is formed by impregnating a base cloth with a solution obtained by dissolving a cured resin in an organic solvent, and then removing the organic solvent, and an emulsion in which the cured resin is dispersed in a medium such as water. It can also be formed by a method of impregnating and then removing the medium.
　未硬化樹脂、又は上記の溶液及びエマルションを基布に含浸させる方法は特に限定されず、例えば、未硬化樹脂、又は上記の溶液及びエマルションに基布を浸漬して含浸させてもよく、未硬化樹脂、又は上記の溶液及びエマルションを、スプレー塗布、刷毛塗り等の方法により基布に塗布して含浸させてもよい。 The method for impregnating the base fabric with the uncured resin or the above solution and emulsion is not particularly limited. For example, the base fabric may be impregnated by immersing the base fabric in the uncured resin or the above solution and emulsion. The resin or the above solution and emulsion may be applied and impregnated on the base fabric by a method such as spray coating or brush coating.
　樹脂層は以下のようにして形成することができる。
　先ず、未硬化樹脂、又は上記の溶液及びエマルションを、基布の一面側から厚さ方向の中間部まで含浸させ、その後、未硬化樹脂等を基布の一面側の表面に更に供給して堆積させ、次いで、未硬化樹脂を硬化させ、又は有機溶媒及び媒体を除去し、一面側の樹脂層を形成する。その後、未硬化樹脂等を基布の他面側から一面側の樹脂層の先端部にまで含浸させ、次いで、未硬化樹脂等を基布の他面側の表面に更に供給して堆積させ、その後、未硬化樹脂を硬化させ、又は有機溶媒及び媒体を除去し、他面側の樹脂層を形成する。このようにして、基布が埋設された中間部と、この中間部の両面側に形成された樹脂のみからなる層とを有する樹脂層を形成することができる。 The resin layer can be formed as follows.
First, impregnate the uncured resin or the above solution and emulsion from one side of the base fabric to the middle in the thickness direction, and then supply the uncured resin etc. to the surface of the one side of the base fabric and deposit it. Then, the uncured resin is cured, or the organic solvent and the medium are removed, and a resin layer on one side is formed. Then, impregnating the uncured resin or the like from the other surface side of the base fabric to the tip of the resin layer on the one surface side, then further supplying and depositing the uncured resin or the like on the surface of the other surface side of the base fabric, Thereafter, the uncured resin is cured or the organic solvent and the medium are removed to form a resin layer on the other surface side. In this way, it is possible to form a resin layer having an intermediate portion in which the base fabric is embedded and a layer made of only resin formed on both sides of the intermediate portion.
　また、複数の基布、例えば、２枚の基布を重ね合わせて用いるときは、先ず、一方の基布の表面から未硬化樹脂等を他方の基布の一部にまで含浸させ、その後、未硬化樹脂等を一方の基布の表面に更に供給して堆積させ、次いで、未硬化樹脂を硬化させ、又は有機溶媒及び媒体を除去し、一方の基布側の樹脂層を形成する。その後、未硬化樹脂等を他方の基布の表面から一方の基布側の樹脂層の先端部にまで含浸させ、次いで、未硬化樹脂等を他方の基布の表面に更に供給して堆積させ、その後、未硬化樹脂を硬化させ、又は有機溶媒及び媒体を除去し、他方の基布側の樹脂層を形成する。このようにして、基布が埋設された中間部と、この中間部の両面側に形成された樹脂のみからなる層とを有する樹脂層を形成することができる。 When a plurality of base fabrics, for example, two base fabrics are used in an overlapping manner, first, an uncured resin is impregnated from the surface of one base fabric to a part of the other base fabric, and then An uncured resin or the like is further supplied and deposited on the surface of one base fabric, and then the uncured resin is cured or the organic solvent and medium are removed to form a resin layer on the one base fabric side. Thereafter, the uncured resin or the like is impregnated from the surface of the other base fabric to the tip of the resin layer on the one base fabric side, and then the uncured resin or the like is further supplied and deposited on the surface of the other base fabric. Thereafter, the uncured resin is cured, or the organic solvent and the medium are removed, and the other base fabric side resin layer is formed. In this way, it is possible to form a resin layer having an intermediate portion in which the base fabric is embedded and a layer made of only resin formed on both sides of the intermediate portion.
　更に、前記のように、樹脂層は、全体が同材質からなっていてもよく、基布の厚さ方向の中間部を境界として、加圧シュー側と湿紙供給側とで異なる材質からなっていてもよい。樹脂層が異なる材質からなる場合、加圧シュー側の樹脂層は、低硬度の柔軟な樹脂を用いて形成し、湿紙供給側の樹脂層は、高硬度の樹脂を用いて形成することが好ましい。このように加圧シュー側の樹脂層を低硬度とすることにより、加圧シュー側においてクラックが生じ難くなり、且つ進行し難くなる。また、湿紙供給側の高硬度の樹脂層にクラックが生じ、加圧シュー側に向かって進行したとしても、加圧シュー側の低硬度の樹脂層にまでクラックが生じるのを抑えることができる。一方、湿紙供給側の樹脂層を高硬度とすることにより、加圧シュー側においてクラックが生じたとしても、潤滑油が湿紙供給側の表面に滲出するのを防止することができる。 Further, as described above, the resin layer may be entirely made of the same material, and is made of different materials on the pressure shoe side and the wet paper web supply side, with the middle portion in the thickness direction of the base fabric as a boundary. It may be. When the resin layer is made of a different material, the pressure shoe side resin layer may be formed using a soft resin with low hardness, and the wet paper web side resin layer may be formed using a high hardness resin. preferable. Thus, by making the resin layer on the pressure shoe side low in hardness, cracks are less likely to occur on the pressure shoe side and it is difficult to proceed. Moreover, even if a crack occurs in the high hardness resin layer on the wet paper supply side and proceeds toward the pressure shoe side, it is possible to suppress the occurrence of the crack even in the low hardness resin layer on the pressure shoe side. . On the other hand, by setting the resin layer on the wet paper supply side to a high hardness, it is possible to prevent the lubricating oil from seeping out on the surface of the wet paper supply side even if a crack occurs on the pressure shoe side.
　上記のように、樹脂層を特定の２層構造とすることにより、耐用日数の長いシュープレス用ベルトとすることができる。更に、この場合、高硬度の樹脂層の厚さ（ｔ１）と低硬度の樹脂層の厚さ（ｔ２）との比は特に限定されないが、高硬度の樹脂層がより厚いことが好ましく、ｔ１／ｔ２が４．０～１．２、特に２．０～１．２であることが好ましい。ｔ１／ｔ２が４．０～１．２、特に２．０～１．２であれば、上記の２層構造にすることによる作用効果が十分に奏される。 As described above, by forming the resin layer into a specific two-layer structure, a shoe press belt having a long service life can be obtained. Further, in this case, the ratio of the thickness (t 1 ) of the high hardness resin layer to the thickness (t 2 ) of the low hardness resin layer is not particularly limited, but it is preferable that the high hardness resin layer is thicker. T 1 / t 2 is preferably 4.0 to 1.2, particularly preferably 2.0 to 1.2. When t 1 / t 2 is 4.0 to 1.2, particularly 2.0 to 1.2, the effect of the two-layer structure is sufficiently exhibited.
　また、シュープレス用ベルト１００の湿紙供給側の樹脂層２１の表面、即ち、シュープレス用ベルト１００の湿紙供給側の表面は平坦面であってもよいが、搾水効率を向上させるため、排水溝（図３、４の符号２１ａの排水溝）が設けられていることが好ましい。 Further, the surface of the resin layer 21 on the wet paper supply side of the shoe press belt 100, that is, the surface of the shoe press belt 100 on the wet paper supply side may be a flat surface. A drainage groove (a drainage groove denoted by reference numeral 21a in FIGS. 3 and 4) is preferably provided.
　本発明のシュープレス用ベルトが組み込まれる湿紙搾水用シュープレス装置の構造等は特に限定されないが、この装置は、通常、プレスロールと、このプレスロールに対向して配設される加圧シューとを備え、プレスロールと加圧シューとの間を加圧された状態で走行する湿紙が搾水される。また、通常、プレスロールと加圧シューとの間に、プレスロール側から、湿紙、製紙用フェルト及びシュープレス用ベルトが、この順で介装されて走行し、加圧されて搾水される。更に、プレスロールと湿紙との間にも製紙用フェルトを介装させることができ、必要に応じて更に他の製紙用織物を１種又は２種以上介装させることもできる。 The structure or the like of the shoe press device for wet paper squeezing in which the shoe press belt of the present invention is incorporated is not particularly limited, but this device is usually a press roll and a pressurization disposed opposite to the press roll. A wet paper web that is provided with a shoe and travels in a pressurized state between a press roll and a pressure shoe is squeezed. Further, usually, wet paper, papermaking felt and shoe press belt are interposed between the press roll and the pressure shoe in this order from the press roll side, and are pressed and squeezed. The Further, a papermaking felt can be interposed between the press roll and the wet paper, and one or more other papermaking fabrics can be interposed as required.
　以下、実施例により本発明を具体的に説明する。
実施例１（シュープレス用ベルト基布）
　繊度４～５デニールのＰＥＴ製モノフィラメントを３６０本引き揃え、３回／インチの撚りをかけてマルチフィラメント原糸を作製し、その後、３本の原糸を引き揃え、９回／インチの撚りをかけ、糸径が約０．８５ｍｍの大径のストレート経糸を作製した。更に、繊度４～５デニールのＰＥＴ製モノフィラメントを２４０本引き揃え、９回／インチの撚りをかけてマルチフィラメント原糸を作製し、その後、３本の原糸を引き揃え、９回／インチの撚りをかけ、糸径が約０．６５ｍｍの大径のストレート緯糸を作製した。また、この大径のストレート緯糸の作製に用いたマルチフィラメント原糸に３回／インチの撚りを掛けて小径の緯糸（繊度１０００デニール）として用いた。 Hereinafter, the present invention will be described specifically by way of examples.
Example 1 (Shoe press belt base fabric)
Pull up 360 monofilaments of 4-5 denier PET monofilament and twist 3 times / inch to make a multifilament yarn, then draw 3 yarns together and twist 9 times / inch A large straight warp having a yarn diameter of about 0.85 mm was produced. Furthermore, 240 monofilaments of PET with a fineness of 4 to 5 denier are aligned, and a multifilament yarn is produced by twisting 9 times / inch, and then the 3 yarns are aligned, and 9 times / inch. A large straight weft having a yarn diameter of about 0.65 mm was produced by twisting. In addition, the multifilament yarn used for the production of the large-diameter straight weft was twisted 3 times / inch and used as a small-diameter weft (fineness 1000 denier).
　次いで、糸径が０．１５ｍｍのナイロン６製のモノフィラメントを小径の経糸として使用し、１２本／インチの糸密度で引き揃え、その上面に上記の大径のストレート緯糸を２８本／インチの糸密度で引き揃え、その上面に上記の大径のストレート経糸を１２本／インチの糸密度で引き揃えた。その後、上記の小径の緯糸により、大径のストレート緯糸を挟持するようにして引き揃えられた大径のストレート経糸と小径の経糸とに交互に絡合するように織成し、１重織組織を備え、経方向のメッシュ数２４本／インチ、緯方向のメッシュ数５６本／インチのシュープレス用ベルト基布（図１の基布１参照）を製造した。 Next, a nylon 6 monofilament having a diameter of 0.15 mm is used as a small-diameter warp, and is aligned at a yarn density of 12 / inch, and the above-mentioned large-diameter straight weft is 28 / inch on the upper surface. The above-mentioned large-diameter straight warp yarns were aligned on the upper surface at a density of 12 yarns / inch. After that, with the above-mentioned small-diameter weft, weaving so as to alternately entangle the large-diameter straight warp and the small-diameter warp so as to sandwich the large-diameter straight weft, and has a single weave structure A shoe press belt base fabric (see base fabric 1 in FIG. 1) having a mesh number of 24 in the warp direction / inch and a mesh number of 56 in the weft direction / inch was manufactured.
実施例２
　引き揃えられたＰＥＴ製モノフィラメントに８．６回／インチの撚りをかけてマルチフィラメント原糸を作製した他は、実施例１と同様にして糸径が約０．８５ｍｍの大径のストレート経糸を作製した。また、実施例１と同様にして糸径が約０．６５ｍｍの大径のストレート緯糸、及び繊度１０００デニールの小径の緯糸を作製した。その後、実施例１と同様に、糸径が０．１５ｍｍのナイロン６製のモノフィラメントを小径の経糸として使用し、実施例１と同様の操作で、１重織組織を備え、経方向のメッシュ数２４本／インチ、緯方向のメッシュ数５６本／インチのシュープレス用ベルト基布を製造した。 Example 2
A straight warp having a large diameter of about 0.85 mm was obtained in the same manner as in Example 1 except that a multifilament yarn was produced by twisting 8.6 turns / inch to the aligned PET monofilament. Produced. Further, in the same manner as in Example 1, a large-diameter straight weft having a yarn diameter of about 0.65 mm and a small-diameter weft having a fineness of 1000 denier were produced. Thereafter, as in Example 1, a nylon 6 monofilament having a yarn diameter of 0.15 mm was used as a small-diameter warp, and the same operation as in Example 1 was performed to provide a single woven structure and the number of meshes in the warp direction. A belt substrate fabric for shoe presses having 24 lines / inch and 56 meshes / inch in the weft direction was manufactured.
実施例３（シュープレス用ベルト）
　上記実施例１で製造した厚さ１．６ｍｍのシュープレス用ベルト基布を２枚重ね合わせ、加圧シュー側となる一方の基布の表面から、ＮＣＯ末端ウレタンプレポリマーを含有する液状の未硬化樹脂をスプレー塗布し、他方の基布の中間部まで含浸させて未硬化樹脂層を形成し、その後、プレポリマーを反応させ、硬化させて、厚さ３．４ｍｍの低硬度の加圧シュー側の樹脂層（図４の樹脂層２２参照）を形成した。次いで、重ね合わせられたシュープレス用ベルト基布の湿紙供給側となる他方の基布の表面から、ＮＣＯ末端ウレタンプレポリマーを含有する液状の未硬化樹脂をスプレー塗布し、加圧シュー側の樹脂層の先端部にまで含浸させて未硬化樹脂層を形成し、その後、プレポリマーを反応させ、硬化させて、厚さ２．６ｍｍの高硬度の湿紙供給側の樹脂層（図４の樹脂層２１参照）を形成した。このようにして合計厚さ６．０ｍｍの樹脂層の中間部に合計厚さ約３ｍｍの２枚の基布が埋設されてなるシュープレス用ベルト（図４のベルト１００参照）を製造した。 Example 3 (Shoe press belt)
Two pieces of 1.6 mm thick belt belts for shoe press produced in Example 1 were overlapped, and from the surface of one of the base fabrics on the pressure shoe side, a liquid non-containing NCO-terminated urethane prepolymer was obtained. A cured resin is applied by spraying and impregnated to the middle part of the other base fabric to form an uncured resin layer. Then, the prepolymer is reacted and cured, and a pressure shoe having a thickness of 3.4 mm and a low hardness. A side resin layer (see resin layer 22 in FIG. 4) was formed. Next, a liquid uncured resin containing an NCO-terminated urethane prepolymer is spray-applied from the surface of the other base fabric on the wet paper feed side of the superimposed shoe press belt base fabric, and the pressure shoe side The resin layer is impregnated up to the tip of the resin layer to form an uncured resin layer, and then the prepolymer is reacted and cured to provide a 2.6 mm thick hard paper web-side resin layer (see FIG. 4). Resin layer 21) was formed. In this way, a shoe press belt (see belt 100 in FIG. 4) in which two base fabrics with a total thickness of about 3 mm were embedded in the middle part of the resin layer with a total thickness of 6.0 mm was manufactured.
実施例４
　実施例２で製造した厚さ１．６ｍｍのシュープレス用ベルト基布を２枚重ね合わせ、実施例３と同様にして、同様の構成の、合計厚さ６．０ｍｍの樹脂層の中間部に合計厚さ約３ｍｍの２枚の基布が埋設されてなるシュープレス用ベルトを製造した。 Example 4
Two pieces of 1.6 mm thick belt belts for shoe press produced in Example 2 were overlapped, and in the same manner as in Example 3, the same configuration with the intermediate part of the resin layer with a total thickness of 6.0 mm A shoe press belt in which two base fabrics having a total thickness of about 3 mm were embedded was manufactured.
比較例１（基布及びシュープレス用ベルト）
　図５に記載の経４重織り組織を備え、経方向のメッシュ数６８本／インチ、緯方向のメッシュ数５６本／インチの従来のシュープレス用ベルト基布３を用いて、実施例２と同様にして樹脂層を形成し、シュープレス用ベルトを製造した。この基布３が有する第１層経糸３１１（フェルト側）は、繊度５００デニールのＰＥＴ製マルチフィラメントを３本撚りした撚り糸、第２層経糸３１２は、糸径が０．３５ｍｍのＰＥＴ製モノフィラメント、第３層経糸３１３は、繊度３０００デニールのＰＥＴ製マルチフィラメント、第４層経糸３１４（シュー側）は、糸径が０．３５ｍｍのナイロンモノフィラメントである。また、第１層経糸３１１と第２層経糸３１２とを織成している第１層緯糸３２１、並びに第２層経糸３１２、第３層経糸３１３及び第４層経糸３１４を織成している第２層緯糸３２２、はいずれも糸径が０．４０ｍｍのＰＥＴ製モノフィラメントである。 Comparative Example 1 (base fabric and shoe press belt)
5 using the conventional shoe press belt base fabric 3 having the warp quadruple weave structure shown in FIG. 5 and having a warp direction mesh number of 68 / inch and a weft direction mesh number of 56 / inch. Similarly, a resin layer was formed to produce a shoe press belt. The first layer warp 311 (felt side) of the base fabric 3 is a twisted yarn obtained by twisting three PET multifilaments having a fineness of 500 denier, and the second layer warp 312 is a PET monofilament having a yarn diameter of 0.35 mm, The third layer warp 313 is a PET multifilament having a fineness of 3000 denier, and the fourth layer warp 314 (shoe side) is a nylon monofilament having a yarn diameter of 0.35 mm. Further, the first layer weft 321 that weaves the first layer warp 311 and the second layer warp 312, and the second layer weft that weaves the second layer warp 312, the third layer warp 313, and the fourth layer warp 314. 322 is a PET monofilament having a yarn diameter of 0.40 mm.
　実施例３及び４で製造した各々のシュープレス用ベルト１００，及び比較例１で製造したシュープレス用ベルトの耐久性を、以下のクラック進展試験により評価した。
　実施例３、４及び比較例１で製造したシュープレス用ベルトから切り出した試験片を用いて、ＪＩＳ　Ｋ６２６０に定義されるデマッチャ式屈曲試験機により、下記の試験条件でクラック進展性を評価した。
　試験片の寸法；幅２０ｍｍ、長さ１５０ｍｍ
　往復運動　　；最大距離８０．５ｍｍ、最小距離３８．５ｍｍ、運動距離４２．０ｍｍ　切り込み　　；長さ３ｍｍ、深さ１．５ｍｍ（試験片の長さ方向の中央部において、幅方向の一端部の外面に設けた。この切り込みはベルトにおけるクラックを模したものである。）
　屈曲回数　　；１０００回 The durability of each of the shoe press belts 100 manufactured in Examples 3 and 4 and the shoe press belt manufactured in Comparative Example 1 was evaluated by the following crack growth test.
Using the test pieces cut out from the shoe press belts produced in Examples 3 and 4 and Comparative Example 1, crack progress was evaluated under the following test conditions using a dematcher type bending tester defined in JIS K6260.
Dimension of test piece: width 20 mm, length 150 mm
Reciprocating motion: Maximum distance 80.5 mm, Minimum distance 38.5 mm, Movement distance 42.0 mm Incision; Length 3 mm, depth 1.5 mm (outer surface of one end in the width direction at the center in the length direction of the test piece) (This notch simulates a crack in the belt.)
Number of bends: 1000 times
　上記のようにして評価した結果、実施例３で製造したシュープレス用ベルトでは、屈曲後の切り込みの寸法は３．５ｍｍ、即ち、クラックの進展は０．５ｍｍであり、実施例４で製造したシュープレス用ベルトでは、屈曲後の切り込みの寸法は３．６ｍｍ、即ち、クラックの進展は０．６ｍｍであり、実施例３、４の両方でクラックが進展し難いことが分かる。一方、比較例１で製造したシュープレス用ベルトでは、屈曲後の切り込みの寸法は４．０ｍｍ以上、即ち、クラックの進展は１．０ｍｍ以上であり、クラックが進展し易いことが分かる。 As a result of the evaluation as described above, the shoe press belt manufactured in Example 3 had a notch size of 3.5 mm after bending, that is, the crack progress was 0.5 mm, and was manufactured in Example 4. In the shoe press belt, the incision size after bending is 3.6 mm, that is, the crack progress is 0.6 mm, and it can be seen that in both Examples 3 and 4, it is difficult for the crack to progress. On the other hand, in the shoe press belt manufactured in Comparative Example 1, the notch size after bending is 4.0 mm or more, that is, the crack progress is 1.0 mm or more, and it can be seen that the crack easily develops.
　本発明のシュープレス用ベルト基布は、抄紙機のプレスパートを構成する各種の湿紙搾水用シュープレス装置に装着して用いられるシュープレス用ベルトの基布として利用することができる。また、本発明のシュープレス用ベルトは、抄紙機において湿紙を搾水するための各種の構造のシュープレス装置に装着されるシュープレス用ベルトとして利用することができる。 The shoe press belt base fabric of the present invention can be used as a shoe press belt base fabric used by being mounted on various wet paper squeezing shoe press devices constituting a press part of a paper machine. Further, the shoe press belt of the present invention can be used as a shoe press belt mounted on a shoe press device having various structures for squeezing wet paper in a paper machine.

Claims (9)

  1. 　大径のストレート経糸と、大径のストレート緯糸と、小径の経糸と、がこの順に厚さ方向に配置され、且つ該大径のストレート経糸及び該小径の経糸と交絡する小径の緯糸により織成された１重織組織を備えるシュープレス用ベルト基布であって、
    　上記大径のストレート経糸及び上記大径のストレート緯糸は、ポリエステル樹脂製のマルチフィラメントであり、且つ糸径が０．３～１．３ｍｍ、上記小径の経糸は、ポリアミド樹脂製のモノフィラメントであり、且つ糸径が０．１～０．３ｍｍ、上記小径の緯糸は、ポリアミド樹脂製又はポリエステル樹脂製のマルチフィラメント又はモノフィラメントであり、且つマルチフィラメントである場合は繊度が４００～１５００デニール、モノフィラメントである場合は糸径が０．１～０．３ｍｍ、であることを特徴とするシュープレス用ベルト基布。     A large-diameter straight warp, a large-diameter straight weft, and a small-diameter warp are arranged in this order in the thickness direction, and are woven by the small-diameter weft entangled with the large-diameter straight warp and the small-diameter warp. A belt base fabric for shoe press comprising a single woven structure,
    The large-diameter straight warp and the large-diameter straight weft are multifilaments made of polyester resin, the yarn diameter is 0.3 to 1.3 mm, and the small-diameter warp is a monofilament made of polyamide resin. The weft yarn with a diameter of 0.1 to 0.3 mm and a small diameter is a multifilament or monofilament made of polyamide resin or polyester resin, and if it is a multifilament, the fineness is 400 to 1500 denier and monofilament In the case, a shoe press belt base fabric characterized by having a yarn diameter of 0.1 to 0.3 mm.
  2. 　上記小径の緯糸はマルチフィラメントである請求項１に記載のシュープレス用ベルト基布。 The belt base fabric for shoe press according to claim 1, wherein the small-diameter weft is a multifilament.
  3. 　上記大径の経糸の糸径（ｄ１）と、上記大径の緯糸の糸径（ｄ２）との比（ｄ１／ｄ２）が、１．２～１．８である請求項１又は２に記載のシュープレス用ベルト基布。 The ratio (d 1 / d 2 ) between the diameter (d 1 ) of the large diameter warp and the diameter (d 2 ) of the large weft is 1.2 to 1.8. Or the belt base fabric for shoe presses of 2.
  4. 　上記小径の緯糸は、上記大径のストレート経糸のうちの隣り合う２本又は３本の大径のストレート経糸と連続して交絡している請求項１乃至３のうちのいずれか１項に記載のシュープレス用ベルト基布。 The small diameter weft is entangled continuously with two or three large diameter straight warps adjacent to each other among the large diameter straight warps. Belt fabric for shoe press.
  5. 上記小径の緯糸はマルチフィラメントであり、繊度３～８デニールのモノフィラメントが１００～３５０本撚り合わされてなり、１インチ当たり１～５回撚られている請求項１乃至４のうちのいずれか１項に記載のシュープレス用ベルト基布。 5. The small-diameter weft is a multifilament, 100 to 350 monofilaments having a fineness of 3 to 8 denier are twisted together and twisted 1 to 5 times per inch. A belt base fabric for shoe press as described in 1.
  6. 　上記小径の緯糸はマルチフィラメントであり、横断面が扁平形状である請求項１乃至５のうちのいずれか１項に記載のシュープレス用ベルト基布。 The shoe press belt base fabric according to any one of claims 1 to 5, wherein the small-diameter weft is a multifilament and has a flat cross section.
  7. 　上記大径のストレート経糸、上記大径のストレート緯糸、及び上記小径の緯糸、を構成するモノフィラメントが樹脂加工されている請求項１乃至６のうちのいずれか１項に記載のシュープレス用ベルト基布。 The belt base for a shoe press according to any one of claims 1 to 6, wherein monofilaments constituting the large-diameter straight warp, the large-diameter straight weft, and the small-diameter weft are resin processed. cloth.
  8. 　樹脂層と、該樹脂層に埋設されている請求項１乃至７のうちのいずれか１項に記載のシュープレス用ベルト基布と、を備えることを特徴とするシュープレス用ベルト。 A shoe press belt, comprising: a resin layer; and the shoe press belt base fabric according to any one of claims 1 to 7 embedded in the resin layer.
  9. 　２枚の上記シュープレス用ベルト基布が重ね合わされて上記樹脂層に埋設されている請求項８に記載のシュープレス用ベルト。 9. The shoe press belt according to claim 8, wherein the two shoe press belt base fabrics are superposed and embedded in the resin layer.
PCT/JP2010/071933 2010-02-02 2010-12-07 Belt base fabric for shoe press, and shoe press belt including same WO2011096131A1 (en)

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JP6858092B2 (en) * 2017-07-20 2021-04-14 日本フエルト株式会社 Shoe press belt base cloth and shoe press belt
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