Industrial fabrics

Abstract

The industrial fabric (100) is an industrial fabric that joins an upper-side fabric composed of upper-side warp yarns and upper-side weft yarns and a lower-side fabric composed of lower-side warp yarns and lower-side weft yarns. Among them, the upper-side warp yarn (1Ub) functions as an upper-side joining yarn for joining the upper-side fabric and the lower-side fabric, and the lower-side warp yarn (2Lb) functions as a lower-side joining yarn for joining the upper-side fabric and the lower-side fabric. The number of yarn knots formed by the upper-side warp yarn (1Ub) in the upper-side fabric is greater than the number of yarn knots formed by the lower-side warp yarn (2Lb) in the upper-side fabric, and the number of lower-side warp yarns is twice the number of upper-side warp yarns.

Description

Technical Field

[0001] The present invention relates to an industrial fabric for a papermaking machine. Background Art

[0002] Heretofore, as an industrial fabric for a papermaking machine, a papermaking net woven with warp yarns and weft yarns has been widely used. There are many properties that a papermaking net is desired to have. For example, as an industrial fabric considering surface smoothness, an industrial fabric (see Patent Document 1) has been proposed, which is composed of an upper fabric composed of upper-side warp yarns and upper-side weft yarns and a lower fabric composed of lower-side warp yarns and lower-side weft yarns. The upper fabric forms an upper complete repeat by an upper-side warp repeat composed of warp yarns in groups of two. The warp yarns in groups of two are warp binding yarns having a function of binding the upper fabric and the lower fabric, and the warp binding yarns are woven into the lower-side weft yarns at the same position as the position where the lower-side warp yarns are woven into the lower-side weft yarns.

[0003] (Prior Art Documents)

[0004] (Patent Documents)

[0005] Patent Document 1: U.S. Patent Application Publication No. 2006 / 0048840. Summary of the Invention

[0006] (Problems to be Solved by the Invention)

[0007] However, in the above-described industrial double-layer fabric, since the two warp binding yarns have the same repeat, the crossed portions are regularly arranged. Therefore, marks caused by the crossed portions are likely to occur.

[0008] The present invention has been made in view of this situation, and one exemplary object thereof is to provide a new industrial fabric that suppresses the generation of marks.

[0009] (Measures for Solving the Problems)

[0010] In order to solve the above problems, an industrial fabric according to a certain aspect of the present invention is an industrial fabric that binds an upper fabric composed of upper side warp and upper side weft and a lower fabric composed of lower side warp and lower side weft. Among them, the first warp yarn of the upper side warp acts as an upper side binding thread that binds the upper side fabric and the lower side fabric, and the second warp yarn of the lower side warp acts as a lower side binding thread that binds the upper side fabric and the lower side fabric. The number of yarn knots formed by the upper side binding thread in the upper side fabric is more than the number of yarn knots formed by the lower side binding thread in the upper side fabric, and the number of lower side warp yarns is twice the number of upper side warp yarns.

[0011] According to this aspect, the number of lower side warp yarns is twice the number of upper side warp yarns. Therefore, the density of the upper side warp yarns becomes smaller, and more upper side weft yarns can be woven in compared with the normal ratio (1:1) of the upper side warp yarns and the lower side warp yarns. As a result, the supportability of the paper raw material is improved, and the texture and retention of the paper are strengthened. In addition, the number of yarn knots formed by the upper side binding thread in the upper side fabric is different from the number of yarn knots formed by the lower side binding thread in the upper side fabric. Therefore, the regularity of the arrangement of the crossing parts of the two binding threads is reduced. As a result, the generation of traces is suppressed.

[0012] The upper side binding thread and the lower side binding thread can also be adjacent.

[0013] The upper side fabric is woven from the upper side binding thread, the lower side binding thread, and the upper side weft. The upper side binding thread and the lower side binding thread complement the surface texture of the upper side fabric. In this way, the two warp yarns complement the texture. Thus, even in the binding part, the texture will not collapse, so the surface property is improved. In addition, the upper side binding thread and the lower side binding thread can also complement the surface texture of the lower side fabric.

[0014] Another aspect of the present invention is also an industrial fabric. This industrial fabric is an industrial fabric that binds an upper fabric composed of upper side warp and upper side weft and a lower fabric composed of lower side warp and lower side weft. Among them, the first warp yarn of the upper side warp acts as an upper side collapsing yarn (deforming yarn) that collapses (deforms) a part of the surface texture of the upper side fabric while being woven into the upper side weft. The second warp yarn of the lower side warp acts as a lower side binding thread that binds the upper side fabric and the lower side fabric. The number of lower side warp yarns is twice the number of upper side warp yarns. The upper side collapsing yarn and the lower side binding thread are adjacent. The upper side fabric is woven at least from the upper side collapsing yarn, the lower side binding thread, and the upper side weft. The upper side collapsing yarn and the lower side binding thread complement the surface texture of the upper side fabric.

[0015] According to this method, the number of lower side warp yarns is twice the number of upper side warp yarns. Therefore, the density of the upper side warp yarns becomes smaller, and compared with the normal ratio (1:1) of the upper side warp yarns and the lower side warp yarns, more upper side weft yarns can be woven in. As a result, the supportability of the paper raw material is improved, and the texture and retention of the paper are strengthened. In addition, the lower side binding yarn is used to bind the upper side fabric and the lower side fabric. Thus, compared with the case of using the upper side binding yarn and the lower side binding yarn to bind the upper side fabric and the lower side fabric, the number of crossed parts is reduced, and high air permeability can be ensured. In addition, the upper side collapse yarn and the lower side binding yarn complement the surface texture of the upper side fabric. Thus, even at the binding part, the texture does not collapse, and therefore the surface property is improved.

[0016] The upper side collapse yarn can be 1 / 3 of the total number of all warp yarns, and the lower side binding yarn can be 1 / 3 of the total number of all warp yarns.

[0017] The total number of upper side warp yarns can be 30 to 150 per inch.

[0018] The total number of upper side weft yarns can be 20 to 150 per inch.

[0019] The surface texture of the upper side fabric can be plain weave. Thus, the fiber supportability and surface smoothness are improved.

[0020] In the lower side fabric, the lower side warp yarns can pass over 4 lower side weft yarns in sequence, under 1 lower side weft yarn, over 2 lower side weft yarns, and under 1 lower side weft yarn.

[0021] The lower side warp yarns can not be binding yarns.

[0022] The lower side binding yarn can have a first lower side binding yarn and a second lower side binding yarn adjacent to both sides of the lower side warp yarn respectively. Regarding the lower side warp yarns, the parts that weave in the lower side weft yarns together with the adjacent first lower side binding yarn and the parts that weave in the lower side weft yarns together with the adjacent second lower side binding yarn can be arranged in a zigzag shape. Thus, different from rib weave, traces are not easily generated.

[0023] In the complete texture, the warp yarns can be 12s and the weft yarns can be 24s.

[0024] In addition, any combination of the above components and the conversion of the expression of the present invention between methods, devices, systems, etc. are effective as the ways of the present invention.

[0025] (Effects of the Invention)

[0026] According to the present invention, the generation of traces can be suppressed. Description of the Drawings

[0027] Figure 1 A design drawing showing the complete weave of the multi-layer fabric for papermaking of the first embodiment.

[0028] Figure 2 Along Figure 1 A cross-sectional view of each warp yarn in the design drawing shown.

[0029] Figure 3 A design drawing showing the complete weave of the multi-layer fabric for papermaking of the second embodiment.

[0030] Figure 4 Along Figure 3 A cross-sectional view of each warp yarn in the design drawing shown.

[0031] Figure 5 A design drawing showing the complete weave of the multi-layer fabric for papermaking of the third embodiment.

[0032] Figure 6 Along Figure 5 A cross-sectional view of each warp yarn in the design drawing shown.

[0033] Figure 7 A design drawing showing the complete weave of the multi-layer fabric for papermaking of the fourth embodiment.

[0034] Figure 8 Along Figure 7 A cross-sectional view of each warp yarn in the design drawing shown. Detailed Embodiments

[0035] Hereinafter, the present invention will be described based on the embodiments with reference to the accompanying drawings. The same or equivalent components, parts, and processes shown in each drawing are given the same reference numerals and repeated descriptions are appropriately omitted. In addition, the embodiments are examples and are not used to limit the invention. All the features described in the embodiments and all combinations of the features are not necessarily the essence of the invention. Further, when terms such as "first" and "second" are used in this specification or claims, unless otherwise specified, they do not represent any order or importance, but are used to distinguish one structure from another structure.

[0036] In addition, in the following description, the "warp yarn" refers to the yarn extending along the conveyance direction of the mesh in the case where a multi-layer fabric for papermaking is formed into an endless conveyor belt, and the "weft yarn" refers to the yarn extending in a direction intersecting the warp yarn. Further, the "upper-side fabric" refers to the fabric on the surface side where the mesh is conveyed among the two sides of the multi-layer fabric when used as a papermaking wire, and the "lower-side fabric" refers to the fabric on the back side where mainly the driving roller abuts among the two sides of the conveyor belt for papermaking. In addition, the "surface" alone refers to the exposed side surface of the upper-side fabric or the lower-side fabric. The "surface" of the upper-side fabric corresponds to the surface side of the papermaking wire, and the "surface" of the lower-side fabric corresponds to the back side of the papermaking wire.

[0037] In addition, the "design draft" is the smallest repeating unit of the fabric texture and corresponds to the complete texture of the fabric. That is, the "complete texture" repeats in the front, back, left, and right directions to form the "fabric". Further, the "yarn knuckle" refers to the part where the warp yarn protrudes to the surface after passing over or under one or more weft yarns.

[0038] In addition, the "binding yarn" is at least a part of the warp yarns constituting the upper-side fabric (or the lower-side fabric), and is the warp yarn that should originally be woven only into the weft yarns of the upper-side fabric (or the lower-side fabric), and weaves from the back side (or the surface side) into the weft yarns of the lower-side fabric (or the upper-side fabric) to bind the upper-side fabric and the lower-side fabric.

[0039] [First Embodiment]

[0040] Hereinafter, the structure of the multi-layer fabric for papermaking according to the first embodiment will be described with reference to the drawings. Figure 1 This is a design draft showing the complete texture of the multi-layer fabric for papermaking according to the first embodiment. Figure 2 This is Figure 1 a cross-sectional view along each warp yarn in the shown design draft.

[0041] In the design draft, the warp yarns are represented by Arabic numerals, such as 1, 2, 3... The weft yarns are represented by Arabic numerals with an apostrophe, such as 1', 2', 3... The upper-side yarns are represented by numbers with U, and the lower-side yarns are represented by numbers with L, such as 1'U, 2'L, etc. In addition, the binding yarns that bind the upper-side fabric and the lower-side fabric are represented by numbers with b.

[0042] In addition, in the design draft, the ▲ mark indicates the case where the yarn originally constituting the lower-side warp yarn is arranged above the upper-side weft yarn, the × mark indicates the case where the upper-side warp yarn is arranged above the upper-side weft yarn, the △ mark indicates the case where the yarn originally constituting the upper-side warp yarn is arranged below the lower-side weft yarn, and the ○ mark indicates the case where the lower-side warp yarn is arranged below the lower-side weft yarn.

[0043] Figure 1 The industrial fabric 100 of the first embodiment shown is a fabric in which an upper fabric composed of upper side warp yarns (1Ub, 4Ub, 7Ub, 10Ub) and upper side weft yarns (1'U to 16'U) and a lower fabric composed of lower side warp yarns (2Lb, 3L, 5Lb, 6L,..., 12L) and lower side weft yarns (1'L, 3'L,..., 15'L) are joined together.

[0044] Then, with reference to Figure 2 The knitting method of each warp yarn and each weft yarn in the industrial fabric 100 will be described. The upper side warp yarn 1Ub functions as an upper side joining yarn that joins the upper fabric and the lower fabric. The upper side warp yarn 1Ub is interwoven as follows: It passes above the upper side weft yarn 1'U to form a surface side yarn knot, then passes between the upper side weft yarns 2'U to 4'U and the lower side weft yarn 3'L, passes below the lower side weft yarn 5'L to form a back side yarn knot, passes between the upper side weft yarns 6'U to 8'U and the lower side weft yarn 7'L, passes above the upper side weft yarn 9'U to form a surface side yarn knot, then passes below the upper side weft yarn 10'U, then passes above the upper side weft yarn 11'U to form a surface side yarn knot,..., then passes below the upper side weft yarn 14'U, then passes above the upper side weft yarn 15'U to form a surface side yarn knot, and then passes below the upper side weft yarn 16'U.

[0045] The lower side warp yarn 2Lb is adjacent to the upper side warp yarn 1Ub and functions as a lower side joining yarn that joins the upper fabric and the lower fabric. The lower side warp yarn 2Lb is interwoven as follows: It passes between the upper side weft yarns 1'U to 2'U and the lower side weft yarn 1'L, passes above the upper side weft yarn 3'U to form a surface side yarn knot, then passes below the upper side weft yarn 4'U, then passes above the upper side weft yarn 5'U to form a surface side yarn knot, then passes below the upper side weft yarn 6'U, then passes above the upper side weft yarn 7'U to form a surface side yarn knot, passes between the upper side weft yarns 8'U to 10'U and the lower side weft yarn 9'L, passes below the lower side weft yarn 11'L to form a back side yarn knot, and then passes between the upper side weft yarns 12'U to 16'U and the lower side weft yarns 13L', 15'L.

[0046] The lower side warp yarn 3L is interwoven as follows: It passes below the lower side weft yarn 1'L to form a back side yarn knot, then passes between the upper side weft yarns 2'U to 10'U and the lower side weft yarns 3'L, 5'L, 7'L, 9'L, passes below the lower side weft yarn 11'L to form a back side yarn knot, and then passes between the upper side weft yarns 12'U to 16'U and the lower side weft yarns 13'L, 15'L.

[0047] The upper warp yarn 4Ub that functions as the upper side joining yarn is interwoven as follows: It passes under the lower weft yarn 1’L to form a back side yarn knot, then passes between the upper weft yarns 2’U to 3’U and the lower weft yarn 3’L, passes above the upper weft yarn 4’U to form a front side yarn knot, then passes between the upper weft yarn 5’U and the lower weft yarn 5’L, passes above the upper weft yarn 6’U to form a front side yarn knot, ……, then passes between the upper weft yarn 11’U and the lower weft yarn 11’L, passes above the upper weft yarn 12’U to form a front side yarn knot, and then passes between the upper weft yarns 13’U to 16’U and the lower weft yarns 13’L, 15’L.

[0048] The lower warp yarn 5Lb that functions as the lower side joining yarn is interwoven as follows: It is adjacent to the upper warp yarn 4Ub, passes between the upper weft yarn 1’U and the lower weft yarn 1’L, passes above the upper weft yarn 2’U to form a front side yarn knot, then passes between the upper weft yarns 3’U to 6’U and the lower weft yarns 3’L, 5’L, passes under the lower weft yarn 7’L to form a back side yarn knot, then passes between the upper weft yarns 8’U to 13’U and the lower weft yarns 9’L, 11’L, 13’L, passes above the upper weft yarn 14’U to form a front side yarn knot, then passes between the upper weft yarn 15’U and the lower weft yarn 15’L, and passes above the upper weft yarn 16’U to form a front side yarn knot.

[0049] The lower warp yarn 6L is interwoven as follows: It passes between the upper weft yarns 1’U to 6’U and the lower weft yarns 1’L, 3’L, 5’L, passes under the lower weft yarn 7’L to form a back side yarn knot, then passes between the upper weft yarns 8’U to 12’U and the lower weft yarns 9’L, 11’L, passes under the lower weft yarn 13’L to form a back side yarn knot, and then passes between the upper weft yarns 14’U to 16’U and the lower weft yarn 15’L.

[0050] In addition, for Figure 1 、 Figure 2 the upper warp yarns 7Ub, 10Ub and the lower warp yarns 8Lb, 9L, 11Lb, 12L shown, except that they are woven with an offset of 8 upper weft yarns in the conveying direction, they are the same as the above-mentioned upper warp yarns 1Ub, 4Ub and the lower warp yarns 2Lb, 3L, 5Lb, 6L, and the description of the weaving method is omitted.

[0051] As described above, the industrial fabric 100 of the present embodiment is configured in a state where an upper fabric composed of upper side warp yarns (1Ub, 4Ub, 7Ub, 10Ub) and upper side weft yarns (1'U to 16'U) and a lower fabric composed of lower side warp yarns (2Lb, 3L, 5Lb, 6L,..., 12L) and lower side weft yarns (1'L, 3'L,..., 15'L) are interwoven. Figure 1 The shown complete weave.

[0052] In addition, in the industrial fabric 100, there are a total of 12 shafts of upper side warp yarns (1Ub, 4Ub, 7Ub, 10Ub) and lower side warp yarns (2Lb, 3L, 5Lb, 6L,..., 12L), and a total of 24 shafts of upper side weft yarns (1'U to 16'U) and lower side weft yarns (1'L, 3'L,..., 15'L). Thus, compared with a complete weave where the weft yarn is 48 shafts, for example, the force pulling the upper side weft yarns with the interwoven yarns downward is more uniform in the industrial fabric 100, so the smoothness is improved. In addition, compared with a complete weave where the weft yarn is 48 shafts, the number of up-and-down movements of the interwoven yarns in the industrial fabric 100 increases and the number of interweaving points increases, so the interweaving force becomes stronger and internal wear is suppressed.

[0053] In addition, in the industrial fabric 100, the number of lower side warp yarns (8 pieces) is twice the number of upper side warp yarns (4 pieces). Therefore, the density of the upper side warp yarns becomes smaller, and compared with the usual ratio (1:1) of upper side warp yarns and lower side warp yarns, the upper side weft yarns can be woven in more times. As a result, the support for the paper raw material is improved, the texture of the paper is strengthened, and the retention is enhanced.

[0054] In addition, the space ratio (the gap between warp yarns) of the upper side warp yarns becomes larger, and the space ratio of the lower side warp yarns decreases. As a result, when the raw material is dehydrated, the flow velocity on the surface side of the industrial fabric 100 decreases, and the flow velocity on the back side increases, so it becomes slow dehydration and the texture of the paper is strengthened. In addition, if there is a lot of water remaining inside the mesh, a phenomenon called splash occurs where the water scatters like mist due to the high-speed rotation of the paper machine. However, in the industrial fabric 100 of the present embodiment, the surface tension of the water on the surface side can be made low, and the water inside the mesh can be made less, so the occurrence of splash can be suppressed.

[0055] In the industrial fabric 100 of the present embodiment, the number (5) of yarn knots formed by the upper warp yarns 1Ub (4Ub, 7Ub, 10Ub) as the upper side binding yarns in the upper side fabric is different from the number (3) of yarn knots formed by the lower warp yarns 2Lb (5Lb, 8Lb, 11Lb) as the lower side binding yarns in the upper side fabric. Thus, in the industrial fabric 100, the upper side binding yarns and the lower side binding yarns have different weaves.

[0056] Generally, there are the following tendencies in the crossing part of two binding yarns: (i) the water removal property decreases, and (ii) the traction of the upper side weft yarns is locally enhanced. Therefore, if the crossing parts are regularly arranged, it is easy to generate marks (marks of the weft yarns, regularly inclined marks) in this part. In particular, in the case where the binding yarns have the same weave, regularity appears, and thus the above problems are likely to occur. Therefore, as in the industrial fabric 100 of the present embodiment, by making the two binding yarns belong to different weaves, the regularity of the arrangement of the crossing parts of the two binding yarns is reduced. As a result, the generation of marks is suppressed. In addition, the smoothness and uniform water removal property are improved, and the texture of the paper is strengthened.

[0057] In addition, the upper side fabric of the industrial fabric 100 is woven from the upper warp yarns (1Ub, 4Ub, 7Ub, 10Ub) as the upper side binding yarns, the lower warp yarns (2Lb, 5Lb, 8Lb, 11Lb) as the lower side binding yarns, and the upper side weft yarns (1'U to 16'U). The upper side binding yarns and the lower side binding yarns complement the surface weave of the upper side fabric. Thus, the two warp yarns complement the weave, and thus, even in the binding part, the weave does not collapse, and therefore the surface property is improved. In addition, the upper side binding yarns and the lower side binding yarns complement the surface weave of the lower side fabric. In addition, in the industrial fabric 100 of the present embodiment, the surface weave of the upper side fabric is plain weave. Thereby, the fiber support property and the surface smoothness are improved.

[0058] Next, the internal wear inside the papermaking net of the multi-layer fabric will be described. Generally, if the bonding force between the upper net (upper side fabric) and the lower net (lower side fabric) is weak, the upper net and the lower net will rub against each other due to the high-speed rotation of the papermaking machine, and internal wear may occur inside the net. If such internal wear occurs, the water removal property and strength of the net decrease, and thus stable papermaking is hindered. Therefore, in the industrial fabric 100 of the present embodiment, the warp yarns woven only into the upper side weft yarns are removed, and 2 / 3 of all the warp yarns are used as binding yarns. Thus, by removing the warp yarns woven only into the upper side weft yarns and increasing the number of binding yarns, the bonding force between the upper side fabric and the lower side fabric can be enhanced, and internal wear can be suppressed.

[0059] Next, the structure on the back side of the industrial fabric 100 of the present embodiment (the surface structure of the lower side fabric) will be described. For example, in the industrial fabric 100, two warp yarns, namely, the lower side warp yarn 2Lb and the lower side warp yarn 3L, are woven into one lower side weft yarn 11'L. Therefore, compared with the structure in which one warp yarn is woven into one lower side weft yarn, the interval between the yarn knots of the lower side weft yarn becomes larger. Since the wear on the machine side is borne by the lower side weft yarn, the service life affected by wear can be increased by the large yarn knots of the lower side weft yarn.

[0060] In addition, in the lower side fabric of the industrial fabric 100, the lower side warp yarns (3L, 6L, 9L, 12L) that are not binder yarns are woven in such a way that they successively pass over 4 lower side weft yarns, under 1 lower side weft yarn, over 2 lower side weft yarns, and under 1 lower side weft yarn. In addition, for example, for the lower side warp yarn 3L, the portion where it weaves the lower side weft yarn 11'L together with the adjacent lower side warp yarn 2Lb which is the lower side binder yarn and the portion where it weaves the lower side weft yarn 1'L together with the adjacent upper side warp yarn 4Ub which is the upper side binder yarn are arranged in a zigzag shape. The same applies to the other lower side warp yarns (6L, 9L, 12L). Thus, different from a rib weave, traces are less likely to occur.

[0061] [Second Embodiment]

[0062] Figure 3 A design drawing showing the complete structure of the multi-layer fabric for papermaking of the second embodiment. Figure 4 Along Figure 3 A cross-sectional view of each warp yarn in the design drawing shown. In addition, the reference numerals and markings in each figure are the same as those in the first embodiment, and the description will be appropriately omitted.

[0063] Figure 3 The industrial fabric 200 of the second embodiment shown is a fabric in which an upper side fabric composed of upper side warp yarns (1U, 4U, 7U, 10U) and upper side weft yarns (1'U to 16'U) and a lower side fabric composed of lower side warp yarns (2Lb, 3L, 5Lb, 6L,..., 12L) and lower side weft yarns (1'L, 3'L,..., 15'L) are joined.

[0064] Next, referring to Figure 4Describe the knitting method of each warp yarn and each weft yarn in the industrial fabric 200. The upper side warp yarn 1U is interwoven as follows: It passes between the upper side weft yarn 1'U and the lower side weft yarn 1'L, passes above the upper side weft yarn 2'U to form a surface side yarn knot, then passes between the upper side weft yarn 3'U and the lower side weft yarn 3L', passes above the upper side weft yarn 4'U to form a surface side yarn knot,..., then passes between the upper side weft yarn 13'U and the lower side weft yarn 13L', passes above the upper side weft yarn 14'U to form a surface side yarn knot, and then passes between the upper side weft yarns 15'U, 16'U and the lower side weft yarn 15'L.

[0065] The lower side warp yarn 2Lb is adjacent to the upper side warp yarn 1U and functions as the lower side binding yarn that binds the upper side fabric and the lower side fabric. The lower side warp yarn 2Lb is interwoven as follows: It passes between the upper side weft yarns 1'U - 4'U and the lower side weft yarns 1'L, 3'L, passes below the lower side weft yarn 5'L to form a back side yarn knot, passes between the upper side weft yarns 6'U - 10'U and the lower side weft yarns 7'L, 9'L, passes below the lower side weft yarn 11'L to form a back side yarn knot, passes between the upper side weft yarns 12'U - 15'U and the lower side weft yarns 13'L, 15'L, and passes above the upper side weft yarn 16'U to form a surface side yarn knot.

[0066] The lower side warp yarn 3L is interwoven as follows: It passes below the lower side weft yarn 1'L to form a back side yarn knot, then passes between the upper side weft yarns 2'U - 10'U and the lower side weft yarns 3'L, 5'L, 7'L, 9'L, passes below the lower side weft yarn 11'L to form a back side yarn knot, and then passes between the upper side weft yarns 12'U - 16'U and the lower side weft yarns 13'L, 15'L.

[0067] The upper side warp yarn 4U is interwoven as follows: It passes above the upper side weft yarn 1'U to form a surface side yarn knot, then passes below the upper side weft yarn 2'U, passes above the upper side weft yarn 3'U to form a surface side yarn knot,..., then passes below the upper side weft yarn 10'U, passes above the upper side weft yarn 11'U to form a surface side yarn knot, then passes between the upper side weft yarns 12'U - 14'U and the lower side weft yarn 13L', passes above the upper side weft yarn 15'U to form a surface side yarn knot, and then passes below the upper side weft yarn 16'U.

[0068] The lower warp yarn 5Lb is adjacent to the upper warp yarn 4U and functions as a lower binding yarn for binding the upper fabric and the lower fabric. The lower warp yarn 5Lb is interwoven as follows: it passes under the lower weft yarn 1'L to form a back yarn section, then passes between the upper weft yarns 2'U to 6'U and the lower weft yarns 3'L and 5'L, passes under the lower weft yarn 7'L to form a back yarn section, then passes between the upper weft yarns 8'U to 12'U and the lower weft yarns 9'L and 11'L, passes on the upper side of the upper weft yarn 13'U to form a surface yarn section, and then passes between the upper weft yarns 14'U to 16'U and the lower weft yarn 15'L.

[0069] The lower side warp yarn 6L is interwoven as follows: it passes between the upper side weft yarns 1'U~6'U and the lower side weft yarns 1'L, 3'L, and 5'L, passes under the lower side weft yarn 7'L to form a back side yarn node, and then passes between the upper side weft yarns 8'U~12'U and the lower side weft yarns 9'L and 11'L, passes under the lower side weft yarn 13'L to form a back side yarn node, and then passes between the upper side weft yarns 14'U~16'U and the lower side weft yarn 15'L.

[0070] In addition, Figure 3 , Figure 4 The upper side warp yarns 7U, 10U and the lower side warp yarns 8Lb, 9L, 11Lb, 12L shown are the same as the above-mentioned upper side warp yarns 1U, 4U and the lower side warp yarns 2Lb, 3L, 5Lb, 6L, except that they are woven with an offset of 8 upper side weft yarns in the conveying direction, and the description of the weaving method is omitted.

[0071] As described above, the industrial fabric 200 of the present embodiment is formed by joining the upper fabric composed of the upper warp yarns (1U, 4U, 7U, 10U) and the upper weft yarns (1'U to 16'U) and the lower fabric composed of the lower warp yarns (2Lb, 3L, 5Lb, 6L, ..., 12L) and the lower weft yarns (1'L, 3'L, ..., 15'L). Figure 3 Complete organization shown.

[0072] In the industrial fabric 200, the upper side warp yarns 1U (4U, 7U, 10U) function as upper side collapsing yarns that collapse a portion of the surface structure of the upper side fabric while being woven into the upper side weft yarns (for example, only the upper side yarn knots are not formed with the upper side weft yarns 16'U), and the lower side warp yarns 2Lb (5Lb, 8Lb, 11Lb) function as lower side binding yarns that bind the upper side fabric and the lower side fabric.

[0073] In addition, in the industrial fabric 200, the number of the lower side warp yarns (8) is twice the number of the upper side warp yarns (4). The upper side warp yarns 1U (4U, 7U, 10U) serving as the upper side collapsing yarns and the lower side warp yarns 2Lb (5Lb, 8Lb, 11Lb) serving as the lower side binding yarns are adjacent to each other. The upper side fabric is woven at least from the upper side collapsing yarns (the upper side warp yarns 1U, 4U, 7U, 10U), the lower side binding yarns (the lower side warp yarns 2Lb, 5Lb, 8Lb, 11Lb), and the upper side weft yarns 1'U to 16'U. The upper side collapsing yarns (the upper side warp yarns 1U, 4U, 7U, 10U) and the lower side binding yarns (the lower side warp yarns 2Lb, 5Lb, 8Lb, 11Lb) complement the surface texture of the upper side fabric.

[0074] In the industrial fabric 200 of the present embodiment, the number of the lower side warp yarns (8) is twice the number of the upper side warp yarns (4). Therefore, the density of the upper side warp yarns becomes smaller, and compared with the normal ratio (1:1) of the upper side warp yarns and the lower side warp yarns, the upper side weft yarns can be woven more times. As a result, the supportability of the paper raw material is improved, and the texture and retention of the paper are strengthened.

[0075] In addition, the lower side warp yarns 2Lb, 5Lb, 8Lb, 11Lb serving as the lower side binding yarns are used to bind the upper side fabric and the lower side fabric. Thus, compared with the case where the upper side binding yarns and the lower side binding yarns are used to bind the upper side fabric and the lower side fabric, the number of crossing parts becomes smaller, and high air permeability can be ensured. In addition, the upper side collapsing yarns and the lower side binding yarns complement the surface texture of the upper side fabric. Thus, even at the binding part, the texture does not collapse, and therefore the surface property is improved. In addition, the upper side collapsing yarns of the present embodiment are 1 / 3 of the total number of all warp yarns, and the lower side binding yarns are 1 / 3 of the total number of all warp yarns.

[0076] In addition, the industrial fabric 200 may also have the lower side warp yarns 2Lb, 5Lb serving as the lower side binding yarns. Regarding the lower side warp yarn 3L, the part where the lower side weft yarn 11'L is woven together with the adjacent lower side warp yarn 2Lb and the part where the lower side weft yarn 1'L is woven together with the adjacent lower side warp yarn 5Lb are arranged in a zigzag shape. The same applies to the other lower side warp yarns (6L, 9L, 12L). Thus, different from a rib weave, traces are not easily generated.

[0077] In addition, in addition to the above-described effects, the industrial fabric 200 of the second embodiment has the effects based on the same structure as the industrial fabric 100 of the first embodiment.

[0078] [Third Embodiment]

[0079] Figure 5Design drawing showing the complete repeat pattern of the multi-layer fabric for papermaking of the third embodiment. Figure 6 Along Figure 5 Cross-sectional views of the warp yarns in the design drawing shown. In addition, the reference numerals and marks in each figure are the same as those in the first and second embodiments, and the description is appropriately omitted.

[0080] Figure 5 , Figure 6 The main feature of the industrial fabric 300 of the third embodiment shown is that the upper-side warp yarns 4U, 10U that are not binder yarns are used to replace the upper-side warp yarns 4Ub, 10Ub that are the upper-side binder yarns of the industrial fabric 100 of the first embodiment, and the lower-side warp yarns 5L, 11L that are not binder yarns are used to replace the lower-side warp yarns 5Lb, 11Lb that are the lower-side binder yarns of the industrial fabric 100. Hereinafter, the upper-side warp yarns 4U, 10U and the lower-side warp yarns 5L, 11L will be mainly described.

[0081] The upper-side warp yarn 4U is interwoven as follows: passing between the upper-side weft yarn 1’U and the lower-side weft yarn 1’L, passing above the upper-side weft yarn 2U’ to form a surface-side yarn knot,..., passing between the upper-side weft yarn 15’U and the lower-side weft yarn 15’L, passing above the upper-side weft yarn 16U’ to form a surface-side yarn knot. The upper-side warp yarn 4U is arranged above the lower-side warp yarn 5L so as to overlap with the lower-side warp yarn 5L.

[0082] The lower-side warp yarn 5L is interwoven as follows: passing below the lower-side weft yarn 1’L to form a back-side yarn knot, then passing between the upper-side weft yarns 2’U to 6’U and the lower-side weft yarns 3’L, 5’L, passing below the lower-side weft yarn 7’L to form a back-side yarn knot, then passing between the upper-side weft yarns 8’U to 16’U and the lower-side weft yarns 9’L, 11’L, 13’L, 15’L.

[0083] In addition, regarding Figure 5 , Figure 6 the upper-side warp yarns 7Ub, 10U and the lower-side warp yarns 8Lb, 9L, 11L, 12L shown, except for being woven with an offset of 8 upper-side weft yarns in the conveying direction, they are the same as the upper-side warp yarns 1Ub, 4U and the lower-side warp yarns 2Lb, 3L, 5L, 6L, and the description of the weaving method is omitted.

[0084] The industrial fabric 300 of the third embodiment has the same function and effect as the industrial fabric 100 of the first embodiment based on the same structure.

[0085] [Fourth Embodiment]

[0086] Figure 7 Design drawing showing the complete repeat pattern of the multi-layer fabric for papermaking of the fourth embodiment.Figure 8 Cross-sectional views of each warp yarn in the design drawing shown below. In addition, the reference numerals and markings in each figure are the same as those in the first to third embodiments, and the description is appropriately omitted. Figure 7 The main feature of the industrial fabric 400 of the fourth embodiment shown in FIGS. is that the upper side warp yarns 4U and 10U, which are not collapsed yarns, are used instead of the upper side warp yarns 4U and 10U, which are the upper side collapsed yarns of the industrial fabric 200 of the second embodiment, and the lower side warp yarns 5L and 11L, which are not binding yarns, are used instead of the lower side binding warp yarns 5Lb and 11Lb of the industrial fabric 200. Hereinafter, the upper side warp yarns 4U and 10U and the lower side warp yarns 5L and 11L will be mainly described.

[0087] Figure 7 、 Figure 8 The upper side warp yarn 4U is interwoven as follows: it passes above the upper side weft yarn 1'U to form a surface side yarn knot, then passes below the upper side weft yarn 2'U, passes above the upper side weft yarn 3'U to form a surface side yarn knot,..., then passes below the upper side weft yarn 14'U, passes above the upper side weft yarn 15'U to form a surface side yarn knot, and passes below the upper side weft yarn 16'U. The upper side warp yarn 4U is arranged above the lower side warp yarn 5L in a manner overlapping with the lower side warp yarn 5L.

[0088] The lower side warp yarn 5L is interwoven as follows: it passes below the lower side weft yarn 1'L to form a back side yarn knot, then passes between the upper side weft yarns 2'U to 6'U and the lower side weft yarns 3'L and 5'L, passes below the lower side weft yarn 7'L to form a back side yarn knot, and then passes between the upper side weft yarns 8'U to 16'U and the lower side weft yarns 9'L, 11'L, 13'L, and 15'L.

[0089] In addition, for the upper side warp yarns 7U and 10U and the lower side warp yarns 8Lb, 9L, 11L, and 12L shown in FIGS., except that they are woven with an offset of 8 upper side weft yarns in the conveying direction, they are the same as the upper side warp yarns 1U and 4U and the lower side warp yarns 2Lb, 3L, 5L, and 6L, and the description of the weaving method is omitted.

[0090] In addition, for Figure 7 、 Figure 8 The industrial fabric 400 of the fourth embodiment has the same structural effects as the industrial fabric 200 of the second embodiment.

[0091] [Processing content]

[0092] [Processing content]

[0093] In the industrial fabrics of the above-described embodiments, the following processing can be performed. For example, in order to improve the surface smoothness, a grinding process in the range of 0.02 to 0.05 mm can be applied to the surface side of the industrial fabric. In particular, a grinding process of 0.02 mm or 0.03 mm can be applied to the surface side.

[0094] In addition, in order to suppress the yarn spreading at the end of the net (industrial fabric), reinforcement can be carried out by coating a range of 5 mm to 30 mm (especially up to 5 mm, 10 mm, 20 mm) from the end of the net with a polyurethane resin. The coating at the end of the net can be carried out on one side or on both sides. The resin can be a polyurethane melt.

[0095] In order to improve the wear resistance at the end of the net, a range of 20 to 500 mm (especially 25, 50, 75, 100, 150, 250, 300, 350, 400 mm) from the end of the net can be coated over the entire length with resin strips in the form of 3 to 16 (especially 3, 4, 7, 8, 10, 12, 15, 16) bands with a width of about 7 mm. The above-mentioned multiple polyurethane resins can be coated on both ends of the net or only on one side of the net. The resin can be a polyurethane melt.

[0096] In addition, in order to improve the stain resistance, the entire net can also be coated with resin. In addition, in order to trim the papermaking width of the paper near the end of the net, a range of 10 mm to 500 mm (especially 10, 15, 20, 25, 30, 40, 50, 75, 100, 150, 200, 250, 300, 350, 400 mm) from the end of the net can be coated over the entire length with a resin strip in the form of 1 band with a width of about 3, 5, 7, 10, 15, 20 mm. The above-mentioned resin can be coated on both ends of the net or only on one side of the net. The resin can be polyurethane or a melt. In addition, lines with a width of about 25 mm or 50 mm can be drawn across the entire width of the net to indicate the bending of the net during use.

[0097] [Specifications]

[0098] Then, the preferred specifications of the industrial fabrics of each embodiment will be described in detail. First, the definition of the warp density will be explained.

[0099] (1) The upper-side warp density in the industrial fabric 100 = (the number of upper-side binding yarns (1Ub, 4Ub, 7Ub, 10Ub) + the number of lower-side binding yarns (2Lb, 5Lb, 8Lb, 11Lb)) / 2 / 1 inch

[0100] (2) The warp density on the upper side in the industrial fabric 200 = (the number of upper-side collapsed warp yarns (1U, 4U, 7U, 10U)) / 1 inch

[0101] (3) The warp density on the upper side in the industrial fabric 300 = (the number of upper-side warp yarns (4U, 10U) + (the number of upper-side binding warp yarns (1Ub, 7Ub) + the number of lower-side binding warp yarns (2Lb, 8Lb)) / 2) / 1 inch

[0102] (4) The warp density on the upper side in the industrial fabric 400 = (the number of upper-side warp yarns (4U, 10U) + the number of upper-side collapsed warp yarns (1U, 7U)) / 1 inch

[0103] (5) The warp density on the lower side in the industrial fabric 100 and the industrial fabric 300 = (the number of lower-side warp yarns (3L, 6L, 9L, 12L) + (the number of upper-side binding warp yarns (1Ub, 4Ub, 7Ub, 10Ub) + the number of lower-side binding warp yarns (2Lb, 5Lb, 8Lb, 11Lb)) / 2) / 1 inch

[0104] (6) The warp density on the lower side in the industrial fabric 200 and the industrial fabric 400 = (the number of lower-side warp yarns (3L, 6L, 9L, 12L) + the number of lower-side binding warp yarns (2Lb, 5Lb, 8Lb, 11Lb)) / 1 inch

[0105] In the above definitions of the warp density, the total number of upper-side warp yarns in each embodiment can be 30 to 150 per inch. In addition, the total number of upper-side weft yarns can be 20 to 150 per inch.

[0106] Then, examples of specific yarn combinations are shown.

[0107] (Example 1)

[0108] Upper-side warp yarn: wire diameter 0.12 mm, PET wire

[0109] Upper-side binding warp yarn: wire diameter 0.12 mm, PET wire

[0110] Lower-side binding warp yarn: wire diameter 0.12 mm, PET wire

[0111] Lower-side warp yarn: wire diameter 0.15 mm, PET wire

[0112] The warp density on the upper side: 75 per inch

[0113] The warp density on the lower side: 150 per inch

[0114] Upper-side weft yarn: wire diameter 0.12 mm, PET and polyamide wire

[0115] Upper weft density: 100 threads per inch

[0116] Lower side weft: wire diameter 0.27 mm, PET and polyamide wire

[0117] Lower weft density: 50 threads per inch

[0118] Mesh thickness: 0.650 mm

[0119] Air permeability: 150 cm 3 / cm 2 / s

[0120] The industrial fabric woven with the yarn of Example 1 makes the lower warp yarns thicker than the upper warp yarns and the binder yarns. Therefore, the industrial fabric is not easily extended in the length direction, and stable operation during use can be achieved. In addition, the upper weft yarns can be woven in more times, so the fiber supportability is improved.

[0121] (Example 2)

[0122] Upper side binder yarn: wire diameter 0.13 mm, PET wire

[0123] Lower side binder yarn: wire diameter 0.13 mm, PET wire

[0124] Lower side warp: wire diameter 0.13 mm, PET wire

[0125] Upper side warp density: 70 threads per inch

[0126] Lower side warp density: 140 threads per inch

[0127] Upper side weft: wire diameter 0.12 mm, PET wire

[0128] Upper weft density: 100 threads per inch

[0129] Lower side weft: wire diameter 0.27 mm, PET and polyamide wire

[0130] Lower weft density: 50 threads per inch

[0131] Mesh thickness: 0.660 mm

[0132] Air permeability: 150 cm 3 / cm 2 / s

[0133] The industrial fabric woven with the yarn of Example 2 makes the wire diameters of the upper side binder yarn, the lower side binder yarn and the lower side warp consistent, so uniform water removal is obtained.

[0134] (Example 3)

[0135] Upper side connecting yarn: wire diameter 0.12mm, PET wire

[0136] Lower side connecting yarn: wire diameter 0.12mm, PET wire

[0137] Lower side warp yarn: wire diameter 0.22mm, PET wire

[0138] Warp yarn density on the upper side: 60 threads per inch

[0139] Warp yarn density on the lower side: 120 threads per inch

[0140] Upper side weft yarn: wire diameter 0.13mm, PET wire

[0141] Upper weft yarn density: 77 threads per inch

[0142] Lower side weft yarn: wire diameter 0.25mm, PET and polyamide wires

[0143] Lower weft yarn density: 50 threads per inch

[0144] Mesh thickness: 0.680mm

[0145] Air permeability: 137cm 3 / cm 2 / s

[0146] The industrial fabric woven with the yarn of Example 3 makes the lower side warp yarn thicker than the upper side connecting yarn and the lower side connecting yarn. Therefore, the industrial fabric is not easily extended in the length direction and the rigidity is improved.

[0147] (Example 4)

[0148] Upper side warp yarn: wire diameter 0.17mm, PET wire

[0149] Upper side connecting yarn: wire diameter 0.17mm, PET wire

[0150] Lower side connecting yarn: wire diameter 0.17mm, PET wire

[0151] Lower side warp yarn: wire diameter 0.17mm, PET wire

[0152] Warp yarn density on the upper side: 50 threads per inch

[0153] Warp yarn density on the lower side: 100 threads per inch

[0154] Upper side weft yarn: wire diameter 0.15mm, PET wire

[0155] Upper weft yarn density: 80 threads per inch

[0156] Lower side weft yarn: wire diameter 0.30mm, PET and polyamide wires

[0157] Lower weft density: 40 threads per inch

[0158] Mesh thickness: 0.880 mm

[0159] Air permeability: 170 cm 3 / cm 2 / s

[0160] The industrial fabric woven with the yarn of Example 4 has all the wire diameters increased, thereby improving rigidity.

[0161] In addition, the wire diameter and density of each yarn can be appropriately selected according to the required performance. For example, regarding the warp yarn, the following combinations are possible.

[0162] · When the warp yarn diameter is 0.13 mm, the upper side warp yarn density is 70 threads per inch and the lower side warp yarn density is 140 threads per inch

[0163] · When the warp yarn diameter is 0.15 mm, the upper side warp yarn density is 60 threads per inch and the lower side warp yarn density is 120 threads per inch

[0164] · When the warp yarn diameter is 0.17 mm, the upper side warp yarn density is 50 threads per inch and the lower side warp yarn density is 100 threads per inch

[0165] · When the warp yarn diameter is 0.20 mm, the upper side warp yarn density is 45 threads per inch and the lower side warp yarn density is 90 threads per inch

[0166] · When the warp yarn diameter is 0.22 mm, the upper side warp yarn density is 40 threads per inch and the lower side warp yarn density is 80 threads per inch

[0167] · When the warp yarn diameter is 0.25 mm, the upper side warp yarn density is 35 threads per inch and the lower side warp yarn density is 70 threads per inch

[0168] · When the warp yarn diameter is 0.30 mm, the upper side warp yarn density is 30 threads per inch and the lower side warp yarn density is 60 threads per inch

[0169] In addition, regarding the weft yarn, the following combinations are possible.

[0170] · When the upper weft yarn diameter is 0.12 mm and the lower weft yarn diameter is 0.27 mm, the upper weft yarn density is 100 threads per inch and the lower weft yarn density is 50 threads per inch

[0171] · When the upper weft yarn diameter is 0.13 mm and the lower weft yarn diameter is 0.27 mm, the upper weft yarn density is 90 threads per inch and the lower weft yarn density is 45 threads per inch

[0172] · When the upper weft diameter is 0.15 mm and the lower weft diameter is 0.30 mm, the upper weft density is 80 threads per inch and the lower weft density is 40 threads per inch

[0173] · When the upper weft diameter is 0.17 mm and the lower weft diameter is 0.30 mm, the upper weft density is 70 threads per inch and the lower weft density is 35 threads per inch

[0174] · When the upper weft diameter is 0.20 mm and the lower weft diameter is 0.35 mm, the upper weft density is 60 threads per inch and the lower weft density is 30 threads per inch

[0175] · When the upper weft diameter is 0.27 mm and the lower weft diameter is 0.40 mm, the upper weft density is 50 threads per inch and the lower weft density is 25 threads per inch

[0176] · When the upper weft diameter is 0.30 mm and the lower weft diameter is 0.45 mm, the upper weft density is 40 threads per inch and the lower weft density is 20 threads per inch

[0177] Enumerate the range of preferred elements of industrial fabrics including the examples above. The linear diameter of the warp is preferably 0.10 - 1.0 mm, more preferably 0.1 - 0.5 mm, and particularly preferably 0.11 - 0.35 mm. In addition, the linear diameter of the weft is preferably 0.10 - 1.0 mm, more preferably 0.12 - 0.6 mm, and particularly preferably 0.12 - 0.55 mm.

[0178] The upper side weft can be composed of only PET threads, only polyamide threads, or alternately interwoven with PET threads and polyamide threads. The lower side weft can be only PET threads, only polyamide threads, or alternately interwoven with PET threads and polyamide threads. In addition, in order to reduce the driving load of the machine, low-friction yarn can be woven into the lower side weft.

[0179] The ratio of the number of upper side weft threads to the number of lower side weft threads can be 1:1, 2:1, 3:1, 4:1, 3:2, 4:3, 5:2, 5:3, 5:4. The air permeability is preferably 100 cm 3 / cm 2 / s - 600 cm 3 / cm 2 / s, more preferably 120 cm 3 / cm 2 / s - 300 cm 3 / cm 2 / s.

[0180] The mesh thickness is preferably 0.3 mm to 3.0 mm, more preferably 0.5 mm to 2.5 mm, and particularly preferably 0.5 mm to 1.0 mm. As the usage, it is mainly used as a conveyor belt for papermaking and non-woven fabrics, especially as a dehydration conveyor belt (belt) for papermaking and a conveyor belt for transporting spunbond non-woven fabrics.

[0181] The cross-sectional shapes of the warp and weft yarns in the above-described embodiments are not limited to circular shapes, and yarns such as square shapes, star shapes, elliptical shapes, hollow shapes, core-sheath structures, etc. can be used. In particular, by forming the cross-sectional shape of the lower warp yarn into a square, rectangular, or elliptical shape, the cross-sectional area of the yarn can be increased, and the tensile resistance and rigidity can be improved.

[0182] In addition, as the material of the yarn, it can be freely selected within the range that satisfies the target characteristics, and the following can be used: polyethylene terephthalate (PET), polyester, polyamide, polyphenylene sulfide, polyvinylidene fluoride, polypropylene, aramid, polyether ether ketone, polyethylene naphthalate, polytetrafluoroethylene, cotton, wool, metal, thermoplastic polyurethane, thermoplastic elastomer, etc. Of course, copolymers and threads mixed or containing various substances in these materials according to the purpose can also be used. Usually, polyester monofilaments having rigidity and excellent dimensional stability are preferably used in the threads constituting industrial fabrics.

[0183] The count of the warp yarn is preferably 6, 9, 12, 15, 18, 24. In addition, the count of the weft yarn is preferably 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48.

[0184] As described above, the present invention has been described with reference to the above-described embodiments, but the present invention is not limited to the above-described embodiments, and appropriate combinations and replacements of the structures of the embodiments are also included in the present invention. In addition, based on the knowledge of those skilled in the art, the combinations and processing orders of the embodiments can be appropriately changed, and various design changes and other deformations can be made to the embodiments, and the embodiments subjected to such deformations also belong to the scope of the present invention.

[0185] (Industrial Applicability)

[0186] The present invention relates to an industrial fabric for a paper machine.

[0187] (Description of reference numerals)

[0188] 1’L: Lower side weft yarn; 1’U: Upper side weft yarn; 1Ub: Upper side warp yarn;

[0189] 2Lb: Lower side warp yarn; 3L: Lower side warp yarn; 4Ub: Upper side warp yarn;

[0190] 5Lb: Lower side warp yarn; 6L: Lower side warp yarn; 7Ub: Upper side warp yarn;

[0191] 8Lb: Lower side warp yarn; 9L: Lower side warp yarn; 10Ub: Upper side warp yarn;

[0192] 11Lb: Lower side warp yarn; 12L: Lower side warp yarn; 100: Industrial fabric.

Claims

1. An industrial fabric, which is an industrial fabric formed by joining an upper fabric composed of upper warp yarns and upper weft yarns and a lower fabric composed of lower warp yarns and lower weft yarns, and is characterized in that, a first warp yarn of the upper warp yarns functions as an upper joining yarn for joining the upper fabric and the lower fabric, a second warp yarn of the lower warp yarns functions as a lower joining yarn for joining the upper fabric and the lower fabric, the number of yarn knots formed by the upper joining yarn in the upper fabric is larger than the number of yarn knots formed by the lower joining yarn in the upper fabric, the number of the lower warp yarns is twice the number of the upper warp yarns, the surface weave of the upper fabric is plain weave.

2. The industrial fabric according to claim 1, characterized in that, the upper joining yarn and the lower joining yarn are adjacent.

3. The industrial fabric according to claim 1 or 2, characterized in that, the upper fabric is woven from the upper joining yarn, the lower joining yarn and the upper weft yarn, the upper joining yarn and the lower joining yarn complement the surface weave of the upper fabric.

4. The industrial fabric according to claim 1, characterized in that, the total number of the upper warp yarns is 30 to 150 per inch.

5. The industrial fabric according to claim 1, characterized in that, the total number of the upper weft yarns is 20 to 150 per inch.

6. The industrial fabric according to claim 1, characterized in that, in the lower fabric, the lower warp yarns pass over 4 lower weft yarns in sequence, pass under 1 lower weft yarn, pass over 2 lower weft yarns, and pass under 1 lower weft yarn.

7. The industrial fabric according to claim 1, characterized in that, in the complete weave, the warp yarn is 12s and the weft yarn is 24s.

8. An industrial fabric, which is an industrial fabric formed by joining an upper fabric composed of upper warp yarns and upper weft yarns and a lower fabric composed of lower warp yarns and lower weft yarns, and is characterized in that, a first warp yarn of the upper warp yarns functions as an upper collapsing yarn that collapses a part of the surface weave of the upper fabric while being woven into the upper weft yarn, a second warp yarn of the lower warp yarns functions as a lower joining yarn for joining the upper fabric and the lower fabric, the number of the lower warp yarns is twice the number of the upper warp yarns, the upper collapsing yarn and the lower joining yarn are adjacent, the upper fabric is woven at least from the upper collapsing yarn, the lower joining yarn and the upper weft yarn, the upper collapsing yarn and the lower joining yarn complement the surface weave of the upper fabric, the upper collapsing yarn is only woven into the upper weft yarn, the surface weave of the upper fabric is plain weave.

9. The industrial fabric according to claim 8, characterized in that, the upper collapsing yarn is 1 / 3 of the total number of all warp yarns, The lower side joining warp yarn is 1 / 3 of the total number of all warp yarns.

10. The industrial fabric according to claim 8, wherein the total number of the upper side warp yarns is 30 to 150 per inch.

11. The industrial fabric according to claim 8, wherein the total number of the upper side weft yarns is 20 to 150 per inch.

12. The industrial fabric according to claim 8, wherein in the lower side fabric, the lower side warp yarns sequentially pass above 4 lower side weft yarns, pass below 1 lower side weft yarn, pass above 2 lower side weft yarns, and pass below 1 lower side weft yarn.

13. The industrial fabric according to claim 12, wherein the lower side warp yarns are not joining yarns.

14. The industrial fabric according to claim 13, wherein the lower side joining warp yarn has a first lower side joining warp yarn and a second lower side joining warp yarn respectively adjacent to both sides of the lower side warp yarns, in the lower side warp yarns, the parts that weave in the lower side weft yarns together with the adjacent first lower side joining warp yarn and the parts that weave in the woven lower side weft yarns together with the adjacent second lower side joining warp yarn are arranged in a zigzag shape.

15. The industrial fabric according to claim 8, wherein in the complete repeat, the warp yarn is 12s and the weft yarn is 24s.

Images