JP7210787B1 - industrial textiles - Google Patents

Abstract

[Problem] To provide an industrial fabric in which the surface of the upper side fabric can improve the supportability of paper fibers and the dewatering property of the lower side fabric can be improved. A weaving pattern is repeatedly formed on the surface of the top-side fabric by the warps located on the top side, passing over one top-side weft and under three continuous top-side wefts. be. On the surface of the lower side fabric, a weaving pattern is repeatedly formed by the lower side warp passing under one lower side weft and passing over three continuous lower side wefts. There are 8 upper surface side warps and 8 lower surface side warps in the complete weave. The upper surface side warps that are paired vertically with the lower surface side binding yarns function as breaking yarns that pass below the upper surface side wefts at positions where the lower surface side binding yarns pass above the upper surface side wefts. [Selection drawing] Fig. 1

Description

The present invention relates to industrial fabrics used on paper machines.

2. Description of the Related Art Conventionally, as industrial fabrics used in paper machines, papermaking nets made by weaving warps and wefts have been widely used. There are various properties required for papermaking nets. An industrial two-ply fabric is disclosed consisting of a bottom side fabric. This industrial two-layer fabric has an upper surface side warp that passes between the upper surface side and the lower surface side without weaving the upper surface side weft once at a portion where the upper surface side weft is to be woven from the upper surface side, A portion where the upper surface side warp has not been woven once includes a lower surface side warp that functions as a binding yarn by weaving from the upper surface side the upper surface side weft that has not been woven by the upper surface side warp.

Japanese Patent Application Laid-Open No. 2004-068168

Since paper fibers are placed and transported on the top side fabric of industrial fabrics, it is preferable to suppress bending of the top side warp so that a large number of top side wefts can be driven, thereby improving the supportability of the paper fibers. Further, when the net thickness of the industrial fabric is reduced, the amount of water retained inside the net is reduced, which is preferable because the dehydration property can be improved.

SUMMARY OF THE INVENTION An object of the present invention is to provide an industrial woven fabric in which the surface of the upper woven fabric can improve the supportability of paper fibers, while the dewatering property of the lower woven fabric can be improved.

In order to solve the above-mentioned problems, an industrial fabric according to one aspect of the present invention comprises a top side fabric composed of top side warps and top side wefts, and a bottom side warp and a bottom side weft that are knotted to the top side fabric. and a lower side fabric. The plurality of lower surface side warps includes lower surface side binding yarns that bind the upper surface side fabric and the lower surface side fabric. On the surface of the upper surface side fabric, a weaving pattern is repeatedly formed by the warp located on the upper surface side, passing over one upper surface side weft and under three continuous upper surface side wefts. The knuckle formed on the surface of the upper surface side fabric by the upper surface side warp passing above the upper surface side weft is caused by the displacement of one upper surface side weft in the warp direction between adjacent upper surface side warps and two upper surface side wefts. Including those with weft misalignment. The knuckles formed by the four aligned upper surface side warps are formed in different upper surface side wefts for each upper surface side warp. On the surface of the lower side fabric, a weaving pattern is repeatedly formed by the lower side warp passing under one lower side weft and passing over three continuous lower side wefts. The knuckles formed on the surface of the lower side fabric by the lower side warps passing under the lower side wefts are caused by the displacement of one lower side weft in the warp direction between adjacent lower side warps and the displacement of two lower side wefts. Including those with side weft misalignment. The knuckles formed by the four aligned lower surface side warps are formed in different lower surface side wefts for each lower surface side warp. There are 8 top side warps and 8 bottom side warps in a complete weave. It functions as a breaking thread that passes under the side weft.

ADVANTAGE OF THE INVENTION According to this invention, the industrial textile which can improve the dewatering property of the lower surface side textile can be provided, while the surface of the upper surface side textile improves the supportability of paper fiber.

FIG. 2 is a design diagram showing the complete design of the industrial fabric according to the embodiment; FIG. 2 is a cross-sectional view in the warp direction along warps in the design drawing shown in FIG. 1 ;

In the following description, the term "warp" refers to a thread extending along the direction in which the paper material is conveyed when a multi-layer fabric for papermaking is used as a looped belt, and the term "weft" refers to the warp. It is a thread that extends in the direction that intersects the In addition, when a multi-layered fabric is used as a papermaking net, the "upper side fabric" is the fabric located on the surface side of the papermaking net on which the paper raw material is conveyed, and the "lower side fabric" is It is the woven fabric positioned mainly on the back side of the papermaking belt, which is in contact with the driving roller. The term “surface” simply refers to the exposed surface of the upper side fabric or the lower side fabric, and the “surface” of the upper side fabric corresponds to the surface side of the papermaking net. The "front side" of corresponds to the back side of the papermaking net.

A "design drawing" is the smallest repeating unit of a fabric design and corresponds to the complete design of the fabric. In other words, the "complete texture" is repeated in the front, back, left and right to form the "fabric". Further, the term "knuckle" refers to a portion where a warp passes over or under one or more wefts and is exposed to the surface.

In addition, the "binding yarn" is at least a part of the warps constituting the upper side fabric and the lower side fabric, and the warp that should be woven only the weft of the lower side fabric is the warp of the upper side fabric. By weaving the weft from the bottom side, it is a thread that joins the fabric on the top side and the fabric on the bottom side.

FIG. 1 is a design diagram showing a complete design of an industrial fabric 10 according to an embodiment. FIG. 2 is a cross-sectional view in the warp direction along the warp in the design drawing shown in FIG.

In design drawings, the warp threads are indicated by Arabic numerals such as 1, 2, 3, and so on. The weft threads are indicated by dashed Arabic numerals, eg 1′, 2′, 3′ . . . Upper side threads are indicated by numbers with U, and lower side threads are indicated by numbers with L, such as 1'U and 2'L. The binding yarns for binding the upper side fabric and the lower side fabric are indicated by numbers with B attached. For example, the binding yarn for the upper side warp is indicated by UB, and the binding yarn for the lower side warp is indicated by LB.

In the design drawings, the x mark indicates that the upper surface side warp is arranged above the upper surface side weft, and the ○ mark indicates that the lower surface side warp is arranged below the lower surface side weft, The ▴ mark indicates that the binding yarns of the lower side warps are arranged on the upper side wefts. X marks, ○ marks and ▲ marks indicate knuckles.

The industrial fabric 10 according to the first embodiment shown in FIG. Lower surface composed of warp yarns (1L to 8LB) and lower surface side weft yarns (1′L, 3′L, 5′L, 7′L, 9′L, 11′L, 13′L, 15′L) The side woven fabric is connected.

The upper surface side warps (1U to 8U) and the lower surface side warps (1L to 8LB) are 8 each in the complete weave, and the upper surface side wefts (1'U to 16'U) are 16 in the complete weave, There are 8 bottom side wefts (1'L, 3'L, 5'L, 7'L, 9'L, 11'L, 13'L, 15'L) in the complete weave. Two of the eight lower side warps (1L to 8LB) in the complete weave function as lower side binding yarns (4LB, 8LB) that bind the upper side fabric and the lower side fabric.

Next, how to weave each warp and each weft in the industrial fabric 10 will be described with reference to FIGS. 2(a) and 2(b). The arrangement of the upper surface side wefts and the lower surface side wefts shown in FIGS. 2(a) and 2(b) is the same.

FIG. 2(a) shows a configuration in which a set of upper surface side warp yarns 3U and lower surface side warp yarns 3L are woven into upper surface side weft yarns and lower surface side weft yarns. As shown in FIG. 2(a), the upper surface side warp 3U passes over one upper surface side weft (3′U, 7′U, 11′U, 15′U), and three continuous upper surface side repeating weave patterns passing under the weft yarns (4′U to 6′U, 8′U to 10′U, 12′U to 14′U, 1′U to 2′U and 16′U); A so-called 1/3 weave weave pattern is formed. The weaving pattern of the 1/3 weave is formed by alternately passing the top side warp over one top side weft and the bottom side of three continuous top side wefts. Four knuckles are formed on the surface of the upper side fabric by the upper side warp 3U passing over one upper side weft (3'U, 7'U, 11'U, 15'U) at four locations.

The upper surface side warps (1U, 2U, 5U to 7U) include upper surface side warps (1'U to 16'U) to form a 1/3 weave weave pattern. In this way, the upper surface side warps (1U to 3U, 5U to 7U) form a weaving pattern of the same 1/3 structure, and the upper surface side wefts (1′U to 16′U) are knuckles at regular intervals. and is woven without destroying the surface texture. Upper surface side warps (1U to 8U) are not woven into lower surface side wefts.

The bottom side warp 3L passes under one bottom side weft (5'L, 13'L), and three continuous bottom side wefts (7'L, 9'L and 11'L and 1 'L, 3'L and 15'L) repeat the weave pattern of 1/3 weave through the upper side.

FIG. 2(b) shows a configuration in which a pair of upper surface side warp yarns 4U and lower surface side binding yarns 4LB are woven into upper surface side weft yarns and lower surface side weft yarns. The upper surface side warp yarns 4U and the lower surface side binding yarns 4LB form a set facing each other vertically and cross each other for binding.

The upper surface side warps 4U pass above the upper surface side wefts (1′U, 9′U, 13′U) to form knuckles, respectively, and form the upper surface side wefts (2′U to 8′U, 10′U to 12′U). 'U, 14'U to 16'U). That is, the upper surface side warp 4U sequentially passes over one upper surface side weft 1′U, passes under the seven continuous upper surface side wefts (2′U to 8′U), and passes under one upper surface side weft. Passing above the upper surface side weft 9′U, passing below three continuous upper surface side wefts (10′U to 12′U), passing above one upper surface side weft 13′U, and continuing A weave pattern is formed that passes under the three top side wefts (14'U to 16'U). The upper surface side warp yarns 8U form a weaving pattern similar to that of the upper surface side warp yarns 4U, although their weaving positions are shifted in the warp direction from the upper surface side warp yarns 4U.

The bottom side binding yarn 4LB passes under one bottom side weft (1'L, 9'L) and three continuous bottom side wefts (3'L, 5'L and 7'L 11'L, 13'L and 15'L) to form a weave pattern of 1/3 weave through the upper side of 11'L, 13'L and 15'L). That is, the lower surface side binding yarn 4LB is woven without destroying the weaving pattern of the lower surface side fabric. The lower side binding yarn 4LB forms a knuckle N1 passing above the upper side weft 5'U for binding, and the upper side weft (1'U to 4'U, 6'U to 16'U) pass below. The bottom side binding yarn 8LB forms the same weaving pattern as the bottom side warp yarn 4LB, although the weaving position is shifted in the warp direction from the bottom side binding yarn 4LB.

The upper surface side warp 4U, which is paired vertically with the lower surface side binding yarn 4LB, passes under the upper surface side weft 5′U at the position where the lower surface side binding yarn 4LB passes above the upper surface side weft 5′U. It does not form a knuckle and functions as a breaking thread. In addition, the upper surface side warp 8U, which is paired vertically with the lower surface side binding yarn 8LB, passes under the upper surface side weft 13′U at the position where the lower surface side binding yarn 8LB passes above the upper surface side weft 13′U. It functions as a breaking thread to pass through.

A set of lower side binding yarns (4LB, 8LB) and breaking yarns (4U, 8U) passes above one upper side weft on the surface of the upper side fabric and is below three continuous upper side wefts. forming a weave pattern through the That is, the sets of the lower side binding yarns (4LB, 8LB) and the breaking yarns (4U, 8U) cooperate to form a weaving pattern of ⅓ weave on the surface of the upper side fabric. In the 1/3 weave, the warp bends less than in the plain weave (1/1 weave), so more top side wefts can be woven. It is possible to improve the yield of paper and obtain good formation.

The upper surface side warps 4U and the lower surface side binding yarns 4LB mutually complement the surface texture of the upper surface side fabric, so that they are similar to the upper surface side warps (1U to 3U, 5U to 7U) other than the upper surface side warps 4U (breaking threads). , and the same number of knuckles as the upper surface side warp yarns (1U to 3U, 5U to 7U) other than the breaking yarn 4U are formed on the upper surface side surface texture. In this way, the set of the breaking thread 4U and the lower side binding thread 4LB complement each other to form a weaving pattern for one upper side warp and one lower side warp, respectively. Further, by knotting with a set of the breaking yarn 4U and the lower side binding yarn 4LB, the surface smoothness of the upper side fabric can be improved as compared with the case where upper and lower binding warp sets are provided. Also, the set of upper surface side warp yarns 8U and lower surface side binding yarns 8LB has the same effect as the set of upper surface side warp yarns 4U and lower surface side binding yarns 4LB.

Knuckles formed on the surface of the upper fabric by passing the upper warps (1U to 8U) and the lower binding yarns (4LB, 8LB) above the upper wefts (Fig. 1 ) are not evenly arranged in the diagonal direction. The warp yarns positioned on the upper surface side refer to the warp yarns partially exposed on the surface of the upper surface side fabric. In addition, the plurality of knuckles formed on the surface of the upper surface side fabric include those having a displacement of one upper surface side weft and a displacement of two upper surface side wefts in the warp direction between adjacent upper surface side warps. The knuckles formed by the four aligned upper surface side warps are formed in different upper surface side wefts for each upper surface side warp. For example, the knuckle Na formed by the upper surface side warp 1U and the upper surface side weft 2′U, the knuckle Nb formed by the upper surface side warp 2U and the upper surface side weft 4′U, the upper surface side warp 3U and the upper surface side weft 3′. The knuckle Nc formed by U and the knuckle Nd formed by the upper surface side warp 4U and the upper surface side weft 1'U are both formed on different upper surface side wefts. The knuckle Na of the upper surface side warp 1U and the knuckle Nb of the upper surface side warp 2U have a displacement of two upper surface side wefts in the warp direction. A knuckle Nc of the upper surface side warp 3U and a knuckle Nd of the upper surface side warp 4U have a displacement of two upper surface side wefts in the warp direction. In addition, the four aligned upper surface side warps (1U to 4U) all form knuckles on different upper surface side wefts (1'U to 4'U). Since the knuckles formed on the surface of the upper side fabric are not aligned obliquely, it is possible to prevent oblique patterns from appearing on the paper manufactured from the industrial fabric 10 . In addition, the number of upper surface side wefts can be increased to improve fiber supportability and yield.

The set of lower side binding yarns (4LB, 8LB) and breaking yarns (4U, 8U) has the same 1/3 structure as the other lower side warp yarns (1L to 3L, 5L to 7L) on the surface of the lower side fabric. to form a weave pattern. As a result, a weaving pattern of 1/3 structure can be formed on the surface of the lower surface side fabric, the net thickness of the industrial fabric can be reduced, the water retained inside the net can be reduced, and the dewatering property can be improved.

On the surface of the lower side fabric, a weaving pattern is repeatedly formed by the lower side warp passing under one lower side weft and passing over three continuous lower side wefts. The knuckles (marked with circles in FIG. 1) formed on the surface of the upper side fabric by the lower side wefts (1L to 8LB) passing above the lower side wefts are not uniformly arranged in the diagonal direction. The plurality of knuckles formed on the surface of the lower side fabric include those having one lower side weft gap and two lower side weft gaps in the warp direction between adjacent lower side warps. The knuckles formed by the four aligned lower surface side warps are formed in different lower surface side wefts for each lower surface side warp. In other words, the knuckles formed on the surface of the lower side fabric are not uniformly arranged in the diagonal direction, like the knuckles formed on the surface of the upper side fabric. If the surface of the lower side fabric is structured such that two adjacent lower side warps are woven together with the lower side wefts at the same time, the intervals between the lower side wefts weaving the lower side wefts are long. As a result, the volume of the exposed bottom side wefts increases, so wear resistance is obtained, but the net thickness increases. In the 1/2-1/4 design, the bottom side warp passes under one bottom side weft, passes over two continuous bottom side wefts, and passes under one bottom side weft. It is formed by repeating a weaving pattern that passes through and over four continuous bottom side wefts. On the other hand, by making the surface of the lower side fabric a weaving pattern of a 1/3 weft with a broken knuckle arrangement, the weaving interval of the lower side weft is shorter than that of the 1/2-1/4 weft, and the weft is exposed. The volume of the lower surface side wefts is reduced, and the net thickness can be reduced. In addition, since the surface of the fabric on the upper surface side has a weaving pattern of 1/3 weave with the arrangement of knuckles disturbed, the net thickness can be reduced. By reducing the net thickness of the industrial fabric 10 in this manner, the dewatering property is improved, and the splash caused by the high-speed rotation of the net can be suppressed. In this way, in the industrial fabric 10, the number of wefts on the surface of the upper side fabric can be increased, so that the paper fiber supportability can be improved, the yield can be improved, and the smoothness can be improved. Net thickness can be reduced.

The bottom side binding yarn 4LB passes over the top side weft 5′U at the center position between passing over the three continuous bottom side wefts (3′L, 5′L, 7′L). A knuckle N1 for joining is formed. As a result, it is possible to prevent the lower side binding yarn 4LB from strongly pulling in the upper side weft 5'U. The bottom side binding thread 8LB also has the same effect as the bottom side binding thread 4LB.

A plurality of lower surface side binding yarns (4LB, 8LB) are arranged at equal intervals across three lower surface side warp yarns (1L to 3L, 5L to 7L) that are not binding yarns. As a result, the lower surface side binding yarns (4LB, 8LB) can be evenly spaced apart from each other, and biased binding positions in the weft direction can be suppressed.

A pair of upper and lower warps (1U to 3U, 5U to 7U) and lower warps (1L to 3L, 5L to 7L) that do not contain binding yarns is called the first warp pair, and is called the lower warp pair. A pair formed vertically by the tying threads (4LB, 8LB) and the breaking threads (4U, 8U) is called a second warp pair. Three first warp pairs are continuously arranged in parallel between the second warp pairs. The ratio of the number of bottom side binding threads (4LB, 8LB) to the bottom side warp threads (1L to 8LB) is 4:1. Thereby, the splicing positions can be dispersed in the latitudinal direction.

The position where each of the two lower surface side binding yarns (4LB, 8LB) in the complete weave passes above the upper surface side wefts (5′U, 13′U) is the position where the eight upper surface side wefts are displaced in the warp direction. be. That is, the knuckle N1 formed on the upper surface side weft 5′U by the lower surface side binding yarn 4LB and the knuckle N2 formed by the lower surface side binding yarn 8LB on the upper surface side weft 13′U are eight upper surfaces in the warp direction. There is a deviation of the side wefts. As a result, in the industrial fabric 10 having 16 upper surface side wefts, the knotting positions can be evenly spaced apart in the warp direction, and biased knotting positions in the warp direction can be suppressed. Also, the number of knuckles can be reduced while the knuckles for joining are spaced evenly. By distributing the joint positions in this manner, inhibition of dehydration due to the joint can be suppressed, and air permeability can be improved.

The number of upper surface side wefts (1′U to 16′U) is the same as the number of lower surface side wefts (1′L, 3′L, 5′L, 7′L, 9′L, 11′L, 13′L, 15′ It is twice the number of L). By increasing the number of upper surface side wefts, the paper fiber supportability can be improved. In addition, eight upper side wefts (1'U, 3'U, 5'U, 7'U, 9'U, 11'U, 13'U, 15'U) and eight lower side wefts ( 1'L, 3'L, 5'L, 7'L, 9'L, 11'L, 13'L, 15'L) are likely to overlap in the vertical direction, and the upper and lower wefts overlap. By doing so, a gap is secured, and the dewatering property can be improved.

The lower side binding yarns (4LB, 8LB) pass over one upper side weft (5'U, 13'U) in the complete weave to form a single knuckle. As a result, it is possible to reduce the area of the lower side binding yarn exposed on the surface of the upper side fabric.

The industrial fabric according to each embodiment described above may be subjected to the following processing. For example, in order to improve the smoothness of the surface, the surface side of the industrial fabric may be polished in the range of 0.02 to 0.05 mm. In particular, the surface side is preferably ground by 0.02 mm or 0.03 mm.

In addition, in order to suppress the fraying of threads at the ends of the net (industrial fabric), the range of 5 mm to 30 mm (especially the range of 5 mm, 10 mm, and 20 mm) from the end of the net is coated with a polyurethane resin. , may be reinforced. The net ends may be coated on one or both sides. The resin may be a hot melt polyurethane.

In order to improve the wear resistance of the net end, the range 20 mm to 500 mm away from the net end (especially the range 25, 50, 75, 100, 150, 250, 300, 350, 400 mm away) is The entire length may be coated with 3 to 16 strips (especially 3, 4, 7, 8, 10, 12, 15, 16 strips) of about 7 mm strips of resin. The plurality of polyurethane resins described above may be applied to both ends of the net, or may be applied to only one side. The resin may be a hot melt polyurethane.

Moreover, in order to improve the antifouling property, the entire mesh may be coated with a resin. In addition, a range 10 mm to 500 mm away from the net end (especially 10, 15, 20, 25, 30, 40, 50, 75, 100, 150, 200 , 250, 300, 350, 400 mm) may be coated over the entire length with a strip of resin having a width of about 3, 5, 7, 10, 15, 20 mm. The aforementioned resin may be applied to both ends of the net, or may be applied to only one side. The resin may be polyurethane and may be hot melt. In addition, a line with a width of about 25 mm or 50 mm may be drawn on the net over the entire width so that bending of the net can be detected during use.

A range of preferred elements for industrial textiles is listed. The wire diameter of the warp (the warp includes the upper surface side warp, the lower surface side warp, the first binding warp, the second binding warp and the third binding warp) is preferably 0.10 to 1.0 mm, and 0.1 to 1.0 mm. 1 to 0.5 mm is more preferable, and 0.11 to 0.35 mm is particularly preferable. The wire diameter of the lower surface side warp may be the same as the wire diameter of the upper surface side warp, and may be set to be 1.1 to 1.2 times as large as the wire diameter of the upper surface side warp. Also, the wire diameter of the weft is preferably 0.10 to 1.0 mm, more preferably 0.12 to 0.6 mm, and particularly preferably 0.12 to 0.55 mm. The wire diameter of the lower side weft is preferably larger than the wire diameter of the upper side weft, and may be 1.1 to 3.0 times as large as the wire diameter of the upper side weft. It may be 2 to 2.0 times as large.

The upper surface side weft may be composed of only PET wire, only polyamide wire, or alternately woven PET wire and polyamide wire. The lower surface side wefts may be only PET wires, only polyamide wires, or PET wires and polyamide wires alternately woven. Also, in order to reduce the driving load of the machine, a low-friction yarn may be woven into the lower side weft yarn.

Air permeability is preferably 100 cm3/cm2/s to 600 cm3/cm2/s, more preferably 120 cm3/cm2/s to 300 cm3/cm2/s.

The net thickness is preferably 0.3 mm to 3.0 mm, more preferably 0.5 mm to 2.5 mm, particularly preferably 0.5 mm to 1.0 mm. It is mainly used as a papermaking or nonwoven fabric belt, and may be used particularly as a papermaking dewatering belt or a spunbond nonwoven fabric conveying belt.

The cross-sectional shape of the warp and weft according to each of the above-described embodiments is not limited to a circular shape, and it is possible to use a square-shaped or star-shaped thread, an oval-shaped thread, a hollow thread, a core-sheath-structured thread, or the like. In particular, by making the cross-sectional shape of the lower warp thread square, rectangular, or elliptical, the cross-sectional area of the thread is increased, and the elongation resistance and rigidity can be improved.

In addition, the material of the thread can be freely selected within the range that satisfies the desired characteristics. Ethylene, cotton, wool, metal, thermoplastic polyurethane, thermoplastic elastomer, etc. can be used. Needless to say, copolymers or yarns made by blending or containing various substances in accordance with the purpose may be used. In general, it is preferable to use a polyester monofilament, which has rigidity and is excellent in dimensional stability, as yarns constituting industrial fabrics.

1'L bottom side weft, 1'U top side weft, 1L bottom side warp, 1U top side warp, 4LB bottom side binding yarn, 10 industrial fabric.

Claims (5)

a top-side fabric composed of top-side warps and top-side wefts;
a lower surface side fabric that is bound to the upper surface side fabric and consists of lower surface side warp yarns and lower surface side weft yarns;
The plurality of lower surface side warps includes lower surface side binding yarns that bind the upper surface side fabric and the lower surface side fabric,
On the surface of the upper surface side fabric, a weaving pattern that passes over one upper surface side weft and under the three continuous upper surface side wefts is repeatedly formed by the warp located on the upper surface side,
The knuckle formed on the surface of the upper surface side fabric by the upper surface side warp passing above the upper surface side weft is formed by the displacement of one upper surface side weft in the warp direction between the adjacent upper surface side warps, and the displacement of the two upper surface side wefts,
The knuckles formed by the four aligned upper surface side warps are formed in different upper surface side wefts for each of the upper surface side warps,
On the surface of the lower side fabric, a weaving pattern that passes under one of the lower side wefts and above three continuous lower side wefts is repeatedly formed by the lower side warps,
The knuckle formed on the surface of the lower side fabric by the lower side warp passing under the lower side weft is a deviation of one lower side weft in the warp direction between the adjacent lower side warps. , and the offset of the two lower side wefts,
The knuckles formed by the four aligned lower surface side warps are formed in different lower surface side wefts for each of the lower surface side warps,
The upper surface side warp and the lower surface side warp are each 8 in the complete weave,
The upper surface side warp vertically paired with the lower surface side binding yarn functions as a breaking yarn that passes below the upper surface side weft at a position where the lower surface side binding yarn passes above the upper surface side weft. An industrial fabric characterized by: a first warp pair formed vertically by the upper surface side warp and the lower surface side warp that do not include a binding yarn;
a second pair of warps formed vertically by the upper surface side warp and the lower surface side binding yarn;
The ratio of the number of the lower surface side binding yarns to the lower surface side warp yarns is 4 to 1,
2. The industrial fabric according to claim 1, wherein the first warp pairs are continuously arranged in three sets between the second warp pairs. Two of the eight lower surface side warps in the complete weave function as the lower surface side binding yarn,
The upper surface side wefts are 16 in a complete weave,
3. A position where each of the two lower surface side binding yarns in the complete weave passes above the upper surface side wefts is offset in the warp direction by the eight upper surface side wefts. Industrial fabric according to. 4. The industrial fabric according to any one of claims 1 to 3, wherein the lower side binding yarn passes over one of the upper side wefts to form a single knuckle in a complete weave. The industrial fabric according to any one of claims 1 to 4, wherein the number of upper side wefts is twice the number of lower side wefts.

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