JP4871989B2 - Shoe press belt - Google Patents

Description

  The present invention relates to a shoe press belt. More specifically, the present invention relates to a shoe press belt that is improved in dimensional stability and crack resistance and further excellent in crack progress resistance.

In a press part that dehydrates wet paper in a paper machine, a shoe press device using a shoe is often used. In recent years, from the viewpoint of improving papermaking efficiency, the speed of the papermaking process has been further increased, and the load on a shoe press belt (hereinafter also referred to as “belt”) that runs in contact with the shoe has increased, resulting in severe conditions. The belt is used.
As a result, the base fabric constituting the belt is flattened by repeated compression, the degree of bending of the yarn is reduced, and a dimensional change is likely to occur in the belt. When the dimensional change occurs, there is a disadvantage that the stability of the rotation state of the belt is lacking.
Further, under the above severe conditions, cracks are likely to occur in the resin in which the belt base fabric for shoe press (hereinafter also referred to as “base fabric”) is embedded and covered.

In the conventional shoe press belt base fabric, for example, as shown in FIG. 6, in the groove portion 31 of the resin member 30, the intersection portion 41 of the weft 21 and the first layer warp 11 is close to the groove bottom portion 31 a, During that time, stress concentrates on the resin member 30 and cracks 32 are likely to occur.
Further, as shown in FIG. 6, the weft 21 and the second-layer warp 12 are also fibrillated (differentiated) easily due to friction between the weft 21a and the second layer warp 12, and the force to support the resin 30 on the upper side is weak. Thus, if a crack is easily generated in the groove bottom 31b of the resin member 30, a sufficient dehydrating effect cannot be obtained, and the belt needs to be replaced. Although the above example is on the felt side (wet paper side), if a crack occurs on the shoe side as well, there is a problem that the lubricating oil oozes from the shoe to the belt, so it is necessary to prevent the crack.

  In order to solve the above problem, a base fabric provided with warp yarns arranged in upper and lower five layers has been proposed. If it is this base fabric, it can be excellent in the dimensional stability of the warp direction (for example, refer patent document 1). In addition, in order to prevent the occurrence of cracks in the resin member, a base fabric made of yarn using a polyamide-based resin has been proposed. Since it is rich in elasticity if it is a polyamide-type resin, a resin member can be supported stably and generation | occurrence | production of a crack can be prevented effectively (for example, refer patent document 2).

JP 2004-197247 A JP 2007-239132 A

Here, if the base fabric layer is further thinned and the thickness of the resin member can be sufficiently secured, the felt side groove portion can be easily formed, and the belt strength can be further increased.
Moreover, if the base fabric layer is rich in elasticity and can support the resin member stably, the generation of cracks can be effectively prevented.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a shoe press belt which has improved dimensional stability and crack resistance and is excellent in crack progress resistance.

The present invention is as follows.
(1) A shoe press belt comprising a resin member and a shoe press belt base fabric embedded in the resin member,
The shoe press belt base fabric has a warp four woven structure having warps and wefts,
The warp has four types arranged in the order of first layer warp, second layer warp, third layer warp and fourth layer warp in the upper and lower four layers,
The weft has only one straight weft arranged at any one of two adjacent yarns formed by the adjacent warps, and a bent weft in which the warp is woven. A shoe press belt, wherein two warps adjacent to the straight weft among the warps are nylon yarns.
(2) The shoe press belt according to (1), wherein the bent weft is a resin-processed twisted yarn.
(3) The shoe press bell according to (1), wherein the bent weft is nylon or polyester monofilament.
(4) The shoe press belt according to any one of (1) to (3), wherein at least one of the first layer warp and the fourth layer warp is a polyester yarn processed with resin.
(5) The shoe press belt according to any one of (1) to (4), wherein the two warps adjacent to the straight weft are nylon yarns having a wire diameter of 0.10 to 0.50 mm.
(6) The shoe press belt according to any one of (1) to (5), wherein the straight weft is a polyester yarn processed with resin.

According to the shoe press belt of the present invention, the warp arranged on the upper and lower four layers of the base fabric used for the shoe press belt and only one straight arranged between the two types of adjacent warps. Further, since the two warps adjacent to the straight yarn are nylon yarns, the dimensional stability and crack resistance are excellent, and friction with the straight weft can be reduced.
Further, if the bent weft is a resin-processed twisted yarn, the friction between the yarns can be reduced by the resin processing, and damage to the warp can be reduced even if it is rubbed with an adjacent warp. For this reason, it can prevent effectively that a crack enters into a resin layer.
Further, if the bent weft is a nylon monofilament, it is excellent in stretchability and low friction, so that damage to the warp can be reduced even if it is rubbed with an adjacent warp. If damage to the warp can be reduced, it is possible to effectively prevent cracks in the resin layer. If the bent weft is a polyester monofilament, the dimensional stability and crack resistance can be further improved.
Further, if at least one of the first layer warp and the fourth layer warp is a polyester yarn processed with resin, the dimensional stability and crack resistance can be further improved.
Further, if the two warps adjacent to the straight weft are nylon monofilaments having a wire diameter of 0.10 to 0.50 mm or resin-processed nylon yarns, the thickness of the base fabric layer can be further reduced. .
Further, if the straight weft is a polyester yarn processed with resin, the dimensional stability and crack resistance can be further improved.

It is explanatory drawing which shows the weft direction cross section of an example of the belt base fabric for shoe presses. It is explanatory drawing which shows the weft direction cross section of the other examples of the belt base fabric for shoe presses. It is explanatory drawing which shows the weft direction cross section of the further another example of the belt base fabric for shoe presses. It is explanatory drawing which shows the weft direction cross section of the prior art example of the belt base fabric for shoe presses. It is a schematic diagram of the apparatus for testing the durability of the shoe press belt. It is explanatory drawing which shows generation | occurrence | production of the crack in the cross section of the weft direction of the conventional example of the belt for shoe presses.

  Hereinafter, the present invention will be described in detail with reference to FIGS. In addition, this invention is not restricted to what is shown to the specific example described in this figure, It can be set as various changes according to the objective and the use.

  The shoe press belt of the present invention is a shoe press belt comprising a resin member and a shoe press belt base fabric embedded in the resin member, wherein the shoe press belt base fabric includes warps and The warp has a warp four woven structure, and the warp has four types arranged in the order of a first layer warp, a second layer warp, a third layer warp and a fourth layer warp in the upper and lower four layers. The weft has only one straight weft arranged at any one position between two adjacent yarns formed by the adjacent warps, and a bent weft in which the warp is woven. In addition, two warps adjacent to the straight weft among the warps are nylon yarns.

Examples of the base fabric used for the shoe press belt of the present invention are shown in FIGS.
A base fabric A shown in FIG. 1 includes a warp 10 arranged in the order of a first layer warp 11, a second layer warp 12, a third layer warp 13, and a fourth layer warp 14, and a weft 20 for these warps 10. , Wherein the weft 20 includes only one straight weft 25 arranged only between two adjacent yarns formed by the adjacent warp 12 and warp 13, and the warp described above. And the two warp yarns 12 and 13 adjacent to the straight yarn 25 are nylon yarns.
Further, the base fabric B shown in FIG. 2 is the same as the base fabric A except that the straight weft 25 is arranged between two adjacent yarns formed by the adjacent first warp 11 and second warp 12. It is.
Further, the base fabrics C to E shown in FIG. 3 are the same as the base fabric A except that the straight wefts 25 are arranged between two adjacent yarns formed by the adjacent third and fourth warps 13 and 14. It is the same.

(1) Warp The above-mentioned “warps” are arranged in the order of the first layer warp 11, the second layer warp 12, the third layer warp 13, and the fourth layer warp 14 in the upper and lower four layers. In order to obtain sufficient warp strength, a warp quadruple woven structure is adopted.
Two of the warps are nylon yarns adjacent to the straight wefts 25 (hereinafter also simply referred to as “adjacent nylon warps”). The remaining two are warps not adjacent to the straight wefts 25 (hereinafter also simply referred to as “non-adjacent warps”). Further, of the warps, one of the first layer warp 11 and the fourth layer warp 14 constitutes a felt side warp, and the other constitutes a shoe side warp.

(1-1) Adjacent Nylon Warp Adjacent nylon warp is a nylon yarn adjacent to the straight weft 25. That is, when the straight weft 25 is adjacent to the first layer warp 11 and the second layer warp 12 (see FIG. 2), the first layer warp 11 and the second layer warp 12 are nylon yarns. When the straight weft 25 is adjacent to the second layer warp 12 and the third layer warp 13 (see FIG. 1), the second layer warp 12 and the third layer warp 13 are nylon yarns. Further, when the straight weft 25 is adjacent to the third layer warp 13 and the fourth layer warp 14 (see FIG. 3), the third layer warp 13 and the fourth layer warp 14 are nylon yarns.
Nylon yarn is excellent in stretchability and strength, and can reduce friction with adjacent yarn. For this reason, by making the adjacent warp nylon, the damage of the straight weft 25 is suppressed, and as a result, the fibrillation of the bent weft 21 can be prevented and the crack of the resin member can be suppressed.

The adjacent nylon warp is not particularly limited as long as it is a yarn containing a polyamide-based resin. The polyamide-based resin is a resin having a polyamide structure. That is, for example, nylon 66, nylon 6, nylon 12, nylon 11, nylon 610, nylon 612 and the like can be mentioned. These may use only 1 type and may use 2 or more types together.
Polyamide resins include copolymers (such as block polyetheramide resins obtained by copolymerizing polyamide resins with polyethers), and blends (such as blends of polyamide resins and block polyetheramide resins). ) Etc. are included.

  The block polyether amide resin includes a polyamide having carboxyl groups at both ends obtained by polycondensation of a polyamide-forming monomer and a dicarboxylic acid, a terminal aminopolyoxyalkylene, and an aliphatic diamine or alicyclic group. Examples thereof include block polyetheramide resins (Japanese Patent Publication No. 63-55535) obtained by polycondensation of diamines selected from diamines and aromatic diamines.

The adjacent nylon warp may be a monofilament or a multifilament.
When a monofilament is used as the adjacent nylon warp, the entire diameter of the base fabric can be reduced because the wire diameter can be reduced. Further, since the adjacent nylon warp mainly aims to protect the straight weft 25, the object can be sufficiently achieved even if the wire diameter is reduced. When a monofilament is used as the adjacent nylon warp, the wire diameter is not particularly limited, but it is preferably independently 0.1 to 0.5 mm, more preferably 0.20 to 0.40 mm. It is especially preferable that it is 25-0.35 mm.

  On the other hand, when a multifilament is used as the adjacent nylon warp, the multifilament may be a non-twisted yarn or a twisted yarn. If it is a non-twisted yarn, the yarn can be flattened and the thickness of the entire base fabric can be reduced, so that the resin layer can be increased and the crack resistance can be improved. Moreover, if it is a twisted yarn, it is more stable in strength and can be excellent in warp direction dimensional stability.

  In addition, when the said multifilament is a twisted yarn, the structure is not specifically limited. That is, for example, (1) a multifilament twisted yarn obtained by twisting two or more multifilament yarns in which monofilaments are aligned, and (2) a multifilament obtained by twisting two or more multifilament twisted yarns (raw yarns). And (3) a multifilament twisted yarn obtained by twisting one multifilament raw yarn in which monofilaments are aligned. Of these, (1) and (2) are preferred. That is, a multifilament twisted yarn using two or more multifilament yarns is preferable. The number of multifilament yarns to be used is not particularly limited as long as it is 2 or more, but 2 to 5 is preferable, and 2 to 4 is more preferable.

  When the adjacent nylon warp is a multifilament twisted yarn, the fineness of the multifilament yarn constituting the multifilament twisted yarn {particularly the multifilament yarn (twisted yarn) constituting the multifilament twisted yarn of (2)} is independent of each other. 200 to 2000 denier is preferred, 300 to 1500 denier is more preferred, and 400 to 1000 denier is particularly preferred.

(1-2) Non-adjacent warp The non-adjacent warp is a warp other than the adjacent nylon warp among the first to fourth layer warps. The material constituting this non-adjacent warp is not particularly limited. For example, vinyl resin (hydrophobized polyvinyl alcohol resin, etc., particularly vinylon), polyamide resin {aliphatic polyamide resin (nylon etc.), aromatic polyamide resin (paraffin). Polymer of phenylenediamine and terephthalic acid, etc.)}, polyester resin, polyolefin resin (polyethylene resin, polypropylene resin, polybutadiene resin, etc.), polyphenylene sulfide resin (PPS) and the like.
These may use only 1 type and may use 2 or more types together. Of these, polyester resins or polyamide resins are preferred.

  That is, for example, when the straight weft 25 is adjacent to the second layer warp 12 and the third layer warp 13 (see FIG. 1), (1) both the first layer warp 11 and the fourth layer warp 14 are polyester. Series resins can be used. (2) A polyester resin can be used for the first layer warp 11 and a polyamide resin can be used for the fourth layer warp 14. Furthermore, (3) a polyamide resin can be used for the first layer warp 11 and a polyester resin can be used for the fourth layer warp 14. Further, (4) a polyamide-based resin can be used for both the first layer warp 11 and the fourth layer warp 14.

  When a polyester-based resin is used for the non-adjacent warp, the warp is excellent in form stability, and a belt excellent in dimensional stability in the warp direction is obtained. On the other hand, when a polyamide-based resin is used for the non-adjacent warp, the warp is excellent in stretchability and low friction. Like the adjacent nylon warp, the bent weft 21 is prevented from being fibrillated, and the resin member is not cracked. Can be suppressed.

For the polyamide resin as the material of the non-adjacent warp, the description of the polyamide resin as the adjacent nylon warp material can be applied as it is.
On the other hand, the polyester resin as the material of the non-adjacent warp is preferably a polyester composed of dicarboxylic acid and glycol. Among these, examples of the dicarboxylic acid component include terephthalic acid, 2,6-naphthalenedicarboxylic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, and the like. Examples of the glycol component include ethylene glycol, propylene glycol, tetramethylene glycol, 1,4-cyclohexanedimethanol and the like. Each of these dicarboxylic acid components and glycol components may be used alone or in combination of two or more.
That is, examples of the polyester resin include polyethylene terephthalate (PET), polypropylene terephthalate, polybutylene terephthalate (PBT), and polyethylene naphthalate. Among these, polyethylene terephthalate (PET) is particularly preferable.
The polyester resin may be used alone, these copolymers may be used, or blends thereof may be used. Furthermore, a polyester resin can be used as a copolymer with another monomer, a blend with another resin, or the like.

  Further, the non-adjacent warp may be either a multifilament or a monofilament. About the structure and twist of a multifilament, the description of the multifilament in the said adjacent nylon warp is applicable as it is. However, when a multifilament twisted yarn is used as the non-adjacent warp, the fineness of the multifilament yarn constituting the multifilament twisted yarn {particularly the multifilament yarn (twisted yarn) constituting the multifilament twisted yarn of (2)} Independently, 1000 to 2000 denier is preferable, 1200 to 1800 denier is more preferable, and 1400 to 1600 denier is particularly preferable. Furthermore, this multifilament twisted yarn is preferably made of a polyester resin.

  Moreover, when multifilament yarn is used as the non-adjacent warp, resin processing can be performed. Resin processing is processing that reduces friction on the yarn surface. The type and treatment method of this resin processing are not particularly limited, but for example, resin processing can be performed by applying an RFL solution (resorcin-formalin-latex solution). The composition of the RFL liquid is not particularly limited. For example, when the entire RFL liquid is 100% by weight, resorcin is 0.1 to 10% by weight, formalin is 0.1 to 10% by weight, and latex is 1 to 28% by weight. % RFL solution is preferred.

  Resin processing using the RFL solution for the multifilament yarn can be performed by applying the RFL solution to the multifilament yarn and then heating and drying and fixing the RFL solution. In this heating, it is composed of heat setting and normalizing, each having a configuration in which a conveying roller is provided in a heating oven, and any known equipment can be used. That is, the multifilament yarn processed with resin is obtained by passing the multifilament yarn after application of the RFL solution through the heat setting zone and the normalizing zone.

  On the other hand, monofilaments can also be used as non-adjacent warps. When a monofilament is used as the non-adjacent warp, it is particularly preferable to use a polyamide monofilament having a large wire diameter. The wire diameter of this polyamide monofilament (especially nylon monofilament) is preferably 0.1 to 0.5 mm, more preferably 0.2 to 0.4 mm, and particularly preferably 0.25 to 0.35 mm.

  Among various aspects of the non-adjacent warp, a multifilament is preferable. When a multifilament is used as the non-adjacent warp, it is stable in strength and excellent in dimensional stability in the warp direction. Moreover, when it is set as a multifilament, although either a twisted yarn or a non-twisted yarn (non-twisted yarn) may be sufficient, it is preferable that it is a twisted yarn. By using a multifilament twisted yarn, the dimensional stability in the warp direction can be particularly excellent. Further, the material is preferably a polyester resin.

(2) Weft Yarn The above-mentioned "weft" is woven with only one straight weft 25 arranged at any one position between two adjacent yarns formed by adjacent warps, and the warp. A bent weft 21.

(2-1) Straight Weft Yarn Straight weft 25 refers to only one yarn arranged at any one of two adjacent yarns formed by adjacent nylon warps. Further, “straight” means extending substantially linearly without bending in the weft direction. That is, the yarn is not used in a form in which warp is woven, such as a bent weft.
The straight weft 25 is not particularly limited as long as it is arranged only at any one of the adjacent nylon warps. For example, in the base fabric A shown in FIG. 1, the straight weft 25 is the second layer warp 12. And the third layer warp 13. Further, in the base fabric B shown in FIG. 2, it is arranged between the first layer warp 11 and the second layer warp 12. Further, in the base fabrics C, D, and E shown in FIG. 3, they are arranged between the third layer warp 13 and the fourth layer warp 14. Thus, the arrangement of the straight wefts 25 can be set according to the purpose and application.

The material constituting the straight weft is not particularly limited, but is preferably a material having sufficient strength to suppress expansion and contraction in the weft direction, for example, a vinyl resin (hydrophobized polyvinyl alcohol resin, etc., particularly vinylon), Polyamide resins {aliphatic polyamide resins (such as nylon), aromatic polyamide resins (such as polymers of paraphenylenediamine and terephthalic acid)}, polyester resins, polyolefin resins (polyethylene resins, polypropylene resins, polybutadiene resins, etc.) And polyphenylene sulfide resin (PPS). These may use only 1 type and may use 2 or more types together.
Among these, a polyester resin is preferable. Regarding the polyester resin, the description of the polyester resin in the non-adjacent warp can be applied as it is.

The straight weft 25 may be a multifilament or a monofilament, but is preferably a multifilament. If it is a multifilament, it is stable in strength and further excellent in dimensional stability in the weft direction.
Further, when a multifilament is used as the straight weft 25, the multifilament may be a twisted yarn or a non-twisted yarn, but a twisted yarn is more preferable. By using a twisted yarn, the strength is more stable and the dimensional stability in the weft direction can be further improved. Moreover, when using a twisted yarn, the fineness of the multifilament raw yarn {particularly the multifilament raw yarn (twisted yarn) constituting the multifilament twisted yarn of (2)} is preferably independently 800 to 1200 denier. 900 to 1100 denier is more preferable, and 950 to 1050 denier is particularly preferable.

Further, when a multifilament is used as the straight weft 25, resin processing can be performed. For this resin processing, the description of resin processing in non-adjacent warps can be applied as it is. Resin processing can improve the slip of the surface of the straight weft 25, can reduce friction, and can suppress wear and fibrillation.
Among these various options, the straight weft 25 is particularly preferably a polyester multifilament processed with resin.

(2-2) Bent Weft 21 The bent weft 21 is a weft 21 that is bent by weaving warps. That is, the straight weft 25 is a weft in which the warp is woven while the warp is not woven. That is, the bent weft 21 is the weft 21 that weaves the warp 10 of the weft 20 in common in the base fabrics A to E shown in FIGS. 1 to 3, the intersection 45 with the first warp 11, and the fourth warp 14. The yarns are bent at the intersections 46.

The material of the bent weft 21 is not particularly limited. Vinyl resin (hydrophobized polyvinyl alcohol resin, etc., particularly vinylon), polyamide resin {aliphatic polyamide resin (nylon, etc.), aromatic polyamide resin (paraphenylenediamine) Polymer of terephthalic acid and the like)}, polyester resin, polyolefin resin (polyethylene resin, polypropylene resin, polybutadiene resin, etc.), polyphenylene sulfide resin (PPS) and the like. These may use only 1 type and may use 2 or more types together.
Of these, polyester resins or polyamide resins are preferred. The description of the non-adjacent warp can be applied to the polyester resin as it is, and the description of the adjacent nylon warp can be applied to the polyamide resin as it is.

  The bent weft 21 may be a multifilament or a monofilament. If the multifilament is used, the strength is stable and the dimensional stability in the weft direction is excellent, and if the monofilament is used, the wire diameter can be reduced and the entire base fabric can be made thin.

Among these, when a multifilament is used as the bent weft 21, the multifilament may be a twisted yarn or a non-twisted yarn, but is preferably a twisted yarn (twisted number is 2 to 10 times per inch), and moreover, a sweet twist (twisted) The number of twisted yarns is particularly preferably 2 to 3 times per inch. In the case of a sweet-twisted twisted yarn, the bent weft 21 can be flattened to make the entire base fabric thinner.
Further, when a multifilament is used as the bent weft 21, the fineness of the multifilament yarn constituting the multifilament {particularly the multifilament yarn (twisted yarn) constituting the multifilament twisted yarn (2)} is independently determined. 800 to 1200 denier is preferable, 900 to 1100 denier is more preferable, and 950 to 1050 denier is particularly preferable.
Further, when a multifilament is used as the bent weft 21, resin processing can be performed. For this resin processing, the description of resin processing in non-adjacent warps can be applied as it is. Resin processing can improve the slip of the surface of the bent weft 21, reduce friction, and suppress wear and fibrillation.
When a multifilament is used as the bent weft 21, the material of the yarn is preferably a polyester resin.

  On the other hand, when a monofilament is used as the bent weft 21, the wire diameter is preferably 0.10 to 0.40 mm, more preferably 0.12 to 0.30 mm, and 0.15 to 0.00. Particularly preferred is 20 mm. In addition, when the monofilament is used, the material of the yarn is preferably a polyamide resin, and particularly preferably a nylon monofilament.

(3) Warp quadruple woven structure The “warp quadruple woven structure” refers to a structure in which wefts are woven in four layers in the weft structure. Due to the warp four-fold structure, the dimensional stability in the warp direction is excellent.
The configuration of the weft structure is not particularly limited, but is preferably a single weft weave. If the weft is a single weave, the second-layer warp can be prevented from being pinched by the weft. The warp direction is preferably a twill weave in order to smooth the crimp of the bent yarn. The number of twills is not particularly limited, but is preferably 8 to 16 twills, more preferably 10 to 14 twills, and particularly preferably 12 to 14 twills.

The number of meshes of the first warp to the fourth warp is preferably 14 to 20 / inch, more preferably 15 to 19 / inch, and particularly preferably 16 to 18 / inch. The weft is preferably 22-34 / inch, more preferably 24-32 / inch, and particularly preferably 26-30 / inch.
Further, the thickness of the entire base fabric is preferably 1.9 to 2.5 mm, more preferably 2.0 to 2.4 mm, and particularly preferably 2.1 to 2.3 mm. .

(4) Resin member The “resin member” is not particularly limited as long as the portion constituting the outermost surface of the base fabric is embedded, and the presence or absence of the resin member in other portions is not particularly limited, but the entire base fabric is normally embedded. Or arranged only on the felt side in the thickness direction of the base fabric. Of these, the former is preferred. That is, it is preferable that the base fabric is completely embedded in the resin member.

  The resin constituting the resin member is not particularly limited as long as it is a resin that can be embedded by impregnating the base fabric. Usually, it is a resin having a low viscosity so that it can easily reach between the warp and the weft constituting the base fabric before the predetermined treatment, and it is preferably a resin member having elasticity by performing the predetermined treatment. . Therefore, usually, an elastic resin that is cured and can exhibit elasticity is used. An example of such a resin is a urethane resin.

The urethane resin may be a one-component type or a two-component type, but is preferably a one-component type. The curing type is not particularly limited. For example, a water curable urethane resin (such as a urethane resin obtained by curing a prepolymer having an NCO terminal with moisture) or a heat curable type (isocyanate group is protected by a protective group). Removing the organic solvent from the solution in which the polymerized polyurethane is dissolved in the organic solvent, and the solvent-removed curing type (such as urethane resin containing a polyisocyanate and cured by dissociation of the protective group by heating). And urethane resin cured by removing the dispersion medium from the urethane emulsion emulsified and dispersed in a dispersion medium such as water). These may use only 1 type and may use 2 or more types together.
Moreover, the drainage groove | channel for improving drainage efficiency can be provided in the surface which comprises the felt side of the resin member which comprises a belt.

[1] Example 1
(1) Shoe Press Belt Base Fabric As shown in FIG. 1, the shoe press belt base fabric A according to Example 1 has a structure of a warp four weave and a single weft single weave. Moreover, it has the warp 10 arrange | positioned in order of the 1st layer warp 11, the 2nd layer warp 12, the 3rd layer warp 13, and the 4th layer warp.
Furthermore, it has only one straight weft 25 arranged between the second layer warp 12 and the third layer warp 13, and a bent weft 21 into which the warp 10 is woven. Each yarn is as follows.
In the following resin processing, the RFL liquid (resorcin; 5% by weight, formalin; 5% by weight, latex; 14% by weight) is applied to the twisted yarn, and then the heat set zone in which the conveying roller is provided. This is a processing performed through the normalizing zone.
Further, the lower twist is a twist applied to the raw yarn (multifilament). Further, the upper twist is a twist in which the raw yarn twisted is bundled and applied in the opposite direction to the lower twist. That is, the first layer warp 11 of Example 1 to be described later is 9 times / 1 inch in the opposite direction to the lower twist of three multifilaments obtained by bundling 1500 multi-layered PET multifilaments twisted 9 times / 1 inch. Means a twisted yarn.

First layer warp 11 and fourth layer warp 14 (non-adjacent warp);
Twisted 1500 denier PET multifilament (twisted 9 times / 1
Inch, twisted 9 times / 1 inch) multifilament yarn processed with resin.
Second layer warp 12 and third layer warp 13 (adjacent nylon warp);
Nylon monofilament with a wire diameter of 0.30 mm.
Bent weft 21;
1000 denier multi-filament yarn of PET with a sweet twist (twist number of turns 2-3 times / 1 inch).
Straight weft 25;
Twist three 1000 denier PET multifilaments (twist 9 times / 1
Inch, top twist 9 times / 1 inch), multifilament yarn processed with resin.

(2) Belt for shoe press A urethane prepolymer is spray-applied to the first layer warp 11 side of the base fabric A and sufficiently impregnated, and then the urethane prepolymer is heated and cured to be a resin member on the first layer warp 11 side. Formed. Next, a urethane prepolymer is spray-applied to the fourth layer warp 14 side and sufficiently impregnated, and then the urethane prepolymer is cured by heating to form a resin member on the fourth layer warp 14 side. A 'was obtained.

[2] Example 2
As shown in FIG. 2, the shoe press belt base fabric B according to Example 2 has a structure of warp four-fold weave and weft single-weave. Moreover, it has the warp 10 arrange | positioned in order of the 1st layer warp 11, the 2nd layer warp 12, the 3rd layer warp 13, and the 4th layer warp.
Furthermore, it has only one straight weft 25 arranged between the first layer warp 11 and the second layer warp 12, and a bent weft 21 in which the warp 10 is woven. Each yarn is as follows. The following resin processing is the same as in Example 1. Further, a resin member was formed using the base fabric B in the same manner as in Example 1 to obtain a shoe press belt B ′.

First layer warp 12 and second layer warp (adjacent nylon warp);
Nylon monofilament with a wire diameter of 0.30 mm.
Third layer warp 13 and fourth layer warp 14 (non-adjacent warp);
Twisted 1500 denier PET multifilament (twisted 9 times / 1
Inch, twisted 9 times / 1 inch) multifilament yarn processed with resin.
Bent weft 21;
1000 denier multi-filament yarn of PET with a sweet twist (twist number of turns 2-3 times / 1 inch).
Straight weft 25;
Twist three 1000 denier PET multifilaments (twist 9 times / 1
Inch, top twist 9 times / 1 inch times) multifilament yarn processed with resin.

[3] Example 3
As shown in FIG. 3, the shoe press belt base fabric C according to Example 3 has a structure of a warp four-fold weave and a single weft single-weave. Moreover, it has the warp 10 arrange | positioned in order of the 1st layer warp 11, the 2nd layer warp 12, the 3rd layer warp 13, and the 4th layer warp.
Furthermore, it has only one straight weft 25 arranged between the third layer warp 13 and the fourth layer warp 14, and a bent weft 21 into which the warp 10 is woven. Each yarn is as follows. The following resin processing is the same as in Example 1. Further, a resin member was formed using the base fabric C in the same manner as in Example 1 to obtain a shoe press belt C ′.

First layer warp 12 and second layer warp (non-adjacent warp);
Twisted 1500 denier PET multifilament (twisted 9 times / 1
Inch, twisted 9 times / 1 inch) multifilament yarn processed with resin.
3rd layer warp 13 and 4th layer warp 14 (adjacent nylon warp);
Nylon monofilament with a wire diameter of 0.30 mm.
Bent weft 21;
1000 yarn denier multifilament with PET twisted (twist number 2-3 times / inch).
Straight weft 25;
Twist three 1000 denier PET multifilaments (twist 9 times / 1
Inch, top twist 9 times / 1 inch), multifilament yarn processed with resin.

[4] Example 4
The belt base fabric D for shoe press according to Example 4 is the same as Example 3 except that the third layer warp 13 and the fourth layer warp 14 are replaced with nylon multifilaments in the base fabric C according to Example 3. It is a base fabric. Resin processing is the same as in Example 1. Further, a resin member was formed using the base fabric D in the same manner as in Example 1 to obtain a shoe press belt D ′.

First layer warp 12 and second layer warp (non-adjacent warp);
Twisted 1500 denier PET multifilament (twisted 9 times / 1
Inch, twisted 9 times / 1 inch) multifilament yarn processed with resin.
3rd layer warp 13 and 4th layer warp 14 (adjacent nylon warp);
A multifilament in which three 500 denier nylon monofilaments are twisted (twisted 9 times / 1 inch, 9 times / 1 inch).
Bent weft 21;
1000 yarn denier multifilament with PET twisted (twist number 2-3 times / inch).
Straight weft 25;
Twist three 1000 denier PET multifilaments (twist 9 times / 1
Inch, top twist 9 times / 1 inch), multifilament yarn processed with resin.

[5] Example 5
The shoe press belt base fabric E according to Example 5 is the same base fabric as Example 3 except that the bent weft 21 is replaced with nylon monofilament in the base fabric C according to Example 3. Resin processing is the same as in Example 1. Further, a resin member was formed using the base fabric E in the same manner as in Example 1 to obtain a shoe press belt E ′.

First layer warp 12 and second layer warp (non-adjacent warp);
Twisted 1500 denier PET multifilament (twisted 9 times / 1
Inch, twisted 9 times / 1 inch) multifilament yarn processed with resin.
3rd layer warp 13 and 4th layer warp 14 (adjacent nylon warp);
Nylon monofilament with a wire diameter of 0.30 mm.
Bent weft 21;
Nylon monofilament straight weft 25 with a wire diameter of 0.15 mm;
Twist three 1000 denier PET multifilaments (twist 9 times / 1
Inch, top twist 9 times / 1 inch), multifilament yarn processed with resin.

[6] Comparative Example As shown in FIG. 4, the shoe press belt base fabric F according to the comparative example is a conventional type warp quadruple weave. A resin member was formed using this base fabric F in the same manner as in Example 1 to obtain a shoe press belt F ′.

First layer warp: A yarn obtained by twisting three 500 denier PET multifilaments.
Second layer warp; 0.35 mm PET monofilament.
Third layer warp; 3000 denier PET multifilament.
Fourth layer warp; 0.35 mm nylon monofilament.
Weft: 0.40 mm PET monofilament.

[6] Durability Evaluation (1) Durability Test (1-1) Crack Propagation Test The shoe press belts A ′ to F ′ obtained in Examples 1 to 5 and Comparative Example are defined in JIS K6260. Using a dematcher type bending tester, a crack progress test was conducted under the following conditions. The size of the test piece was 20 mm wide and 150 mm long, and the reciprocating motion was a maximum distance of 80.5 mm, a minimum distance of 38.5 mm, and a movement distance of 42.0 mm. The incision was made at the center in the length direction of the test piece and at the outer surface of one end in the width direction by 3 mm length and 1.5 mm depth. Under these conditions, after bending 1000 times, the size of the crack was compared for Examples 1-5. The results are shown in the “crack progress” column of Table 1.
“Small”: The crack size was less than 3.5 mm.
“Medium”: The crack size was 3.5 mm or more and less than 4.0 mm.
“Large”: The size of the crack was 4.0 mm or more.

(1-2) Strong Elongation Test Shoe press belt base fabrics A to E wound around five stainless steel rolls 53 on a medium press tester (made in-house) shown in FIG. Was run for 25 hours at a speed of 131.8 m / min in the traveling direction shown in FIG. At this time, each base fabric was run while applying a linear pressure of 40 kg / cm between the stainless steel roll 51 and the rubber roll 52. As a result, the high elongation after 25 hours, that is, the residual strength after fatigue of the base fabric was measured by a STROGRO V10-D manufactured by Toyo Seiki Seisakusho. Further, the strength and elongation were evaluated according to the following criteria, and the results are shown in the column “Residual strength after durability test” in Table 1.
“◯”: The strength elongation was 160 kN / m or more.
“Δ”: The high elongation was 140 kN / m or more and less than 160 kN / m.
"X"; The strength elongation was less than 140 kN / m.

上記試験結果より、実施例１〜５は、クラック進展試験においては進展が小さく、また強伸度試験については残存強度が高かった。この結果から、いずれも寸法安定性に優れていることが分かる。 (2) Results of durability test

From the above test results, Examples 1 to 5 showed little progress in the crack progress test and high residual strength in the strong elongation test. From these results, it can be seen that both are excellent in dimensional stability.

In addition, in this invention, it can restrict to what is shown to the said specific Example, It can be set as the Example variously changed according to the objective and the use.

The shoe press belt of the present invention is suitably used in a shoe press device for the purpose of dewatering wet paper on a paper machine.

  A, B, C, D, E, F; belt base fabric for shoe press, A ′, B ′, C ′, D′ E′F ′; belt for shoe press, 10; warp, 11; first layer warp 12; second layer warp, 13; third layer warp, 14; fourth layer warp, 20; weft, 21; bent weft, 25; straight weft, 30; resin member, 31; grooves, 31a and 31b; Bottom, 32 and 34; crack, 41, 42, 45 and 46; intersection.

Claims (6)

A shoe press belt comprising a resin member and a shoe press belt base fabric embedded in the resin member,
The shoe press belt base fabric has a warp four woven structure having warps and wefts,
The warp has four types arranged in the order of first layer warp, second layer warp, third layer warp and fourth layer warp in the upper and lower four layers,
The weft has only one straight weft arranged at any one of two adjacent yarns formed by the adjacent warps, and a bent weft in which the warp is woven. A shoe press belt, wherein two warps adjacent to the straight weft among the warps are nylon yarns.   The shoe press belt according to claim 1, wherein the bent weft is a twisted yarn processed with resin.   The shoe press belt according to claim 1, wherein the bent weft is a monofilament of nylon or polyester.   The shoe press belt according to any one of claims 1 to 3, wherein at least one of the first layer warp and the fourth layer warp is a resin-processed polyester yarn.   The shoe press belt according to any one of claims 1 to 4, wherein the two warps adjacent to the straight weft are nylon yarns having a wire diameter of 0.10 to 0.50 mm.   6. The shoe press belt according to claim 1, wherein the straight weft is a resin-processed polyester yarn.

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