JP2003342889A - Two-layer woven fabric for industrial use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-layer woven fabric for industrial use, used as a paper-making woven fabric which does not cause such a state that a warp thread does not exist in an upper face side of two layers at a binding point, has such a structure as not to cause local excessive dehydration, has good fiber supporting properties without deteriorating filterability (air permeability), and has good wire marking properties without causing fiber carry back, nor splash, or the like. <P>SOLUTION: In this two-layer woven fabric for industrial use, an upper face side warp thread which composes the upper layer in the construction of the woven fabric travels to the lower surface side without functioning as the upper face side warp thread at a position which composes one point of the perfect construction of the woven fabric, or at positions which compose two or more points thereof, and on which the upper face side warp thread ordinarily interweaves an upper surface side weft thread, nor crossing the upper surface side weft thread at the position, then interweaves a lower face side weft thread from the bottom side of the lower face, further travels to the upper face side, and finally interweaves another upper surface side weft thread, so that the upper surface side warp thread functions as a binding thread. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woven fabric for papermaking, a woven fabric for producing a non-woven fabric, a woven fabric used for dehydration and water extraction of sludge,
The present invention relates to industrial woven fabrics such as building material manufacturing belts and conveyor belts, and particularly to papermaking woven fabrics, and more particularly to papermaking woven fabrics for tissue production.

[0002]

BACKGROUND OF THE INVENTION Conventionally used industrial fabrics include, for example, fabrics for papermaking, fabrics for paper making such as canvas, fabrics for producing non-woven fabrics, fabrics for dehydrating and squeezing water such as sludge, and belts for producing building materials. There are many things such as conveyor belts. These industrial woven fabrics are required to have dimensional stability so that they do not stretch or contract in the width direction because they run while receiving tension in the warp direction during use. In addition, posture stability is required so as not to meander or wrinkle. Further, wear resistance is also required because it is worn by coming into contact with a driving roll or the like during traveling. In addition, the surface is required to be smooth in terms of placing an object on the surface for transportation and processing. Although such a problem is almost common in industrial textiles, it is the current situation that it has not been solved yet. Among the industrial fabrics, the most severely required papermaking fabrics, particularly papermaking fabrics, are required to have various properties unique to the papermaking described below in addition to the above-mentioned properties, but most of the papermaking fabrics will be described. Since the problems common to the industrial woven fabric and the solution thereof can be explained and understood, the present invention will be described below by representing the paper woven fabric. The paper-making method is a well-known technique. First, a paper-making raw material containing pulp fibers and the like is endlessly formed from a headbox and is fed between rolls of a papermaking machine and supplied onto a running papermaking fabric. The side to which the raw material for the papermaking fabric is supplied is the upper layer surface, and the opposite side is the lower layer surface. The supplied raw materials move as the papermaking fabric travels, and during movement, centrifugal force and a dehydration device such as a suction box or foil installed on the lower surface side of the fabric removes water and forms wet paper. To be done. That is, the papermaking fabric functions as a filter and separates pulp fibers and water. The wet paper web formed in the papermaking zone is then transferred to the press zone and the dryer zone. In the press zone, the wet paper web is transported by the papermaking felt and is squeezed by the nip pressure between the press rolls together with the papermaking felt to further remove water. In the dryer zone, the wet paper web is transported by a papermaking canvas and dried to produce paper. Textiles for papermaking are woven by a loom using warps and wefts such as synthetic resin monofilaments. In order to form an endless shape, it is formed endlessly by a well-known woven seam, pin seam, or the like, or is formed endlessly at the stage of weaving with a bag weaving machine. In the case of bag-weaving, the relationship between the warp and the weft is reversed on the loom and during use. In the present specification, the warp yarn is a yarn extending in the machine direction of the papermaking machine, that is, the traveling direction of the fabric,
A weft yarn is a yarn extending in the cross-machine direction of a papermaking machine, that is, the width direction of a fabric. By the way, in order to effectively improve the supportability of the fiber and to produce a high-quality paper without generating wire marks on the paper, the fiber is preferably supported by the weft in view of the orientation of the fiber. This is very important. In particular, in a papermaking fabric for tissue production, since the tissue is very thin and the dewatering zone is short while the paper machine operates at high speed, fiber supportability and paper peeling property are particularly required. Poor fiber support and paper peeling can lead to pinholes, causing not only apparent problems but also lower opacity and paper strength, and also fiber carryback and splash. It is also a big problem in operation. Therefore, conventionally, as a papermaking fabric for tissue production, a single-layer fabric of the type in which weft forms a long crimp on the upper layer side has been mainly used. This is because, in most tissue machines, the filler is not included or the amount is very small even if it is included, so that the fiber supporting property and the paper peeling property are more important than the abrasion resistance. However, single-layer fabrics have become unable to cope with the increasing mechanical load of paper machines, which are becoming ever faster. Single layer fabric is
Although it has advantages such as a thin mesh thickness and good drainage, poor formation due to insufficient rigidity due to its structure, runnability,
The disadvantages, such as poor retention, have grown significantly. Therefore, recently, the use of multiple fabrics in the tissue machine has increased, and the success has been moderate. The structure of the multiple woven fabric is a two-layer upper and lower woven fabric structure in which upper and lower woven fabrics are combined by using a weft double woven fabric or a binding yarn, and the upper layer side structure is such that the weft forms a long crimp on the upper layer side. It is a structure. In the case of a two-layer woven fabric, the lower layer side woven fabric has a flat weave design with two warp yarns arranged in parallel for the purpose of reducing the mesh thickness in order to ensure good dehydration and small water retention. Is used exclusively. In addition, recently, European Patent EP088
A ground yarn binding type two-layer woven fabric, in which upper and lower nets are bound by a part of upper layer warp yarns and which does not have independent binding yarns, as disclosed in 9160A1 is used in part. Since this type of two-layer woven fabric has no independent binding yarn, it was possible to increase the number of weft yarns without lowering the freeness (air permeability). Therefore, it was used with the expectation that the fiber supportability could be improved, but there was a big problem due to the portion where the upper layer warp was bound.
Since the upper layer warp functions as a binding yarn, there is no warp on the upper layer side in the part that is submerged on the lower layer side, and that portion becomes locally excessive dehydration, causing fiber carryback, splash, etc. However, that portion also became a wire mark. When the lateral mark was strong, it had an adverse effect on creping. These issues have not yet been resolved.

[0003]

In view of the above problems, the present invention provides a ground yarn binding type two-layer woven fabric having no independent binding yarn, in which a warp yarn is present on the upper layer surface side at the binding portion. It is possible to increase the number of weft yarns without lowering the freeness (air permeability), and to have good fiber supportability, and the fiber Another object of the present invention is to provide a papermaking fabric having good wire mark properties, which does not cause carryback, splash, or the like.

[0004]

MEANS FOR SOLVING THE PROBLEMS The present invention provides "1. Upper layer side fabric comprising upper layer side warp and upper layer side weft, and lower layer side fabric comprising lower layer side warp and lower layer side weft. In the industrial woven fabric consisting of, the upper surface side warp does not weave the upper surface side warp at one or more positions where the upper surface side warp weaves the upper surface side weft and the upper surface side warp does not An upper layer side warp that functions as a binding yarn by weaving the lower layer side weft from the lower layer side toward the lower layer side and weaving the upper layer side weft toward the upper layer side without intersecting with the weft, On the other hand, the lower layer side warp is a portion where the upper layer side warp weaves the lower layer side weft from the lower side, and the lower layer side warp that weaves the lower layer side weft on the fabric structure does not weave the lower layer side weft, Do not woven the upper surface side warp toward the upper surface side. A two-layer industrial fabric that is a lower layer side warp that functions as a binding yarn by weaving upper layer side wefts from the upper layer side 2. Upper layer side that upper layer side warp weaves into the fabric structure The two-layer industrial woven fabric according to item 1, in which the number of weft yarns on the upper surface side not facing the lower surface side is 1 and the number of the weft yarns on the upper surface side is 1. 3. The upper layer surface side woven fabric has a continuous upper layer surface side warp. Do 3
This is a repetition of the design in which, after passing under the upper surface side weft of the book, it passes over the upper surface side weft of one piece, and the upper surface side weft passes over the upper side of three consecutive upper surface side warps. It is a repetition of the design in which a long crimp is formed on the upper surface side and then passes under one upper surface side warp, and the lower surface side woven design has two lower layer side warps arranged in parallel with the same design. An industrial two-layer woven fabric according to item 1 or 2, which has a plain weave design of a furrow weave design. Regarding Hereinafter, the present invention will be described by taking a papermaking fabric as a representative as described above.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The feature of the present invention is that a part or the whole of the upper surface side warp should be woven from the upper surface side from the upper surface side warp in the upper layer surface side woven fabric originally in the warp direction. Without weaving the upper layer side weft once toward the lower layer side, the lower layer side weft should be woven by the lower layer side weft from the lower layer side, while the lower layer side warp is In the portion where the upper layer side warp weaves the lower layer side weft from the lower layer side toward the lower layer side, the lower layer side weft should originally be woven from the lower layer side weft from the lower layer side design. This is to weave the upper layer side wefts, which should have been originally woven by the upper layer side warp, from the upper layer side, heading toward the upper layer side without being woven once, and originally on the upper layer side fabric design. With the above-mentioned structure, the upper surface side warp functions as a binding yarn so that the lower surface is submerged, that is, in the conventional papermaking fabric disclosed in European Patent EP0889160A1, the upper surface side warp has a warp. In the state where it does not exist, there is local excessive dehydration, and the part that caused problems such as fiber carryback, splash, etc. is supplemented instead of the upper layer side warp by the lower layer side warp rising to the upper layer side. It was possible to solve the problem of local excessive dehydration.

Regarding the lower layer side as well, the lower layer side warp rises to the upper layer side to compensate for the upper layer side and the lower layer side warp is not present at the portion where the lower layer side warp is not present. Therefore, there is no problem to compensate. That is, the upper layer side warp and the lower layer side warp complement each other. Further, the positions where the wefts are complemented to each other and weave are the upper layer side warp, which is the lower layer side weft which the lower layer side warp should originally weave, and the lower layer side warp, which is the upper layer surface which the upper layer side warp should originally weave. Since it is a side weft, the upper layer side design and the lower layer side design do not substantially collapse, and the wire mark characteristics and the like are good. Further, according to the present invention, since the yarn functioning as the binding yarn is the ground yarn constituting the woven fabric structure and is the warp to which the tension is constantly applied during use, the binding yarn of the thin weft is used. Compared with the above, the binding force that binds the upper layer side fabric and the lower layer side fabric is very strong, and since the force that always makes the upper layer side fabric and the lower layer side fabric work closely, the adhesion is good. . Therefore, there is no problem that the binding yarn is rubbed between the two fabrics and internal wear is generated to weaken the binding force, a gap is generated between the two fabrics, and the fabrics are separated. Furthermore, since the present invention has a structure in which the upper and lower ground yarn warps are bound together, the adhesion is further improved. Further, when the upper layer side weft is not woven into the fabric structure and the upper layer side weft is not woven and the number of upper layer side wefts in the portion toward the lower layer side is 1, a warp that functions as a normal warp and a binding yarn The difference in the weaving length between and is small, which is advantageous in weaving.

Further, the upper layer side fabric structure and the lower layer side fabric structure are not particularly limited as long as the above-mentioned constitution can be formed, but the upper layer side fabric structure is composed of three upper layer side warp threads which are continuous. After passing through the lower side of the layer side weft, the upper layer side weft passes through the upper side of three continuous upper layer side warps by repeating the design of passing through the lower side of one upper layer side weft. When a long crimp is formed on one side and then a design passing through the underside of one upper layer side warp is repeated, wefts often appear on the upper layer side, which is the papermaking side, resulting in good fiber supportability. When the lower layer side woven design is a plain weave design of a ridge weave in which two lower layer side warps are arranged in parallel in the same design, the same state as when a thin flat yarn is used for the warp,
Since the crimp length of the weft is also shortened, the net thickness can be made thin, and thus it is particularly suitable for a papermaking fabric for tissue production in which good fiber supporting property, paper peeling property, and thin net thickness are particularly required. .

The density of the number of yarns for the upper layer side fabric is not particularly limited, and the lower layer side weft has the same density as the upper layer side or 1
The density can be set to / 2 or 2/3. The yarn used in the present invention is not particularly limited and can be freely selected depending on the properties desired for the papermaking fabric. For example, in addition to monofilaments, multifilaments, spun yarns, textured yarns that have been crimped or bulked, generally called bulky yarns, processed yarns called stretch yarns, molding yarns, or a combination of these. It is possible to use yarns and the like that are combined. Further, the cross-sectional shape of the thread is not limited to a circular shape, but a rectangular thread such as a square shape or a star shape, an elliptical shape thread, and a hollow thread can be used. In addition, the material of the thread can be freely selected, and polyester, nylon, polyphenylene sulfide, polyfluorovinylidene, tetrafluoroethylene, polypro, aramid, polyether ether ketone, polyethylene naphthalate, cotton, wool, metal, etc. are used. it can. Needless to say, it is possible to use copolymers or yarns obtained by blending or containing various substances in these materials according to the purpose. Generally, it is preferable to use a polyester monofilament having rigidity and excellent dimensional stability for the upper layer side warp, the lower layer side warp and the upper layer side weft. The lower surface side weft, which is required to have abrasion resistance, can be interwoven to improve the abrasion resistance while ensuring rigidity, such as by alternately arranging polyester monofilament and nylon monofilament. Further, it is also possible to arrange and arrange a plurality of threads with the same structure in a portion where one thread is originally arranged on the structure. By arranging and arranging a plurality of yarns having a small wire diameter, it is possible to improve the surface property and reduce the thickness of the woven fabric.

[0009]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a design diagram showing a complete design of an embodiment of the present invention. The complete design is the smallest repeating unit of the woven design, and the complete design is connected vertically and horizontally to form the entire design of the woven design. In the design drawing, the warp threads are indicated by Arabic numerals, for example, 1, 2, 3, and the weft threads are indicated by Arabic numerals with dashes, for example, 1 ', 2', 3 '. In addition, a cross indicates that the upper surface side warp is located above the upper surface side weft, and a circle indicates that the lower surface side warp is located below the lower surface side weft. A mark indicates a portion where the lower layer side warp is located above the upper layer side weft, that is, a binding portion where the lower layer side warp functions as a binding yarn,
The mark □ indicates the portion where the upper layer side warp is located below the lower layer side weft, that is, the binding portion where the upper layer side warp functions as a binding yarn. The warp yarns and the weft yarns on the upper layer side and the lower layer side are arranged one above the other. In the design drawing, the upper and lower warp yarns are accurately overlapped with each other, and the lower and lower warp yarns and weft yarns are arranged directly below the weft yarns. This is for convenience of the drawings. In actual fabrics, they may be arranged at different positions. In this embodiment, the lower layer side woven fabric has a ridge weave design in which two adjacent warp yarns have the same design, so that actually two lower layer side warp yarns are arranged adjacent to each other.

Example 1 FIG. 1 is a design diagram showing a complete design of Example 1 of the present invention. In the design diagram of FIG. 1, 1, 2, 3, 4, 5, 6,
7 and 8 are warp yarns, and an upper layer side warp and a lower layer side warp are arranged vertically. 1 ', 2', 3 '... 16' are wefts, the upper layer side wefts are arranged on the upper side, and the lower layer side wefts are half the density, and the odd numbered upper layer side wefts 1 ', 3' ...
・ It is located below. First, looking at the upper layer side fabric, for example, the upper layer side weft 4'passes above the three upper layer side warps 1, 2, 3 and then one upper layer side warp 4
Passing through the lower side, then the upper side of the three upper surface side warp threads 5, 6, 7 and then the lower side of one upper surface side warp thread 8, and three continuous upper layer surface side warp threads It can be seen that it is a design in which it passes through the upper side of the above and then passes under the one upper surface side warp. On the other hand, the upper surface side warp 4 is composed of three upper surface side wefts 1.
′, 2 ′, 3 ′ passes below, then one upper layer side weft 4 ′ passes, then three upper layer side wefts 5 ′,
6 ', 7'passes under, then one upper layer side weft 8
It can be seen that it is a design that passes through the upper side of ‘′, passes under the three continuous upper surface side wefts, and then passes over the upper surface of one upper surface side weft. Since the upper layer side weft has a design forming a long crimp for three upper layer side warps on the upper layer side, the fiber supportability of the weft is improved. It can be seen that the upper layer side warp is shifted to the upper side by one upper layer side weft and is sequentially arranged, so that it has a twill weave design. In the present embodiment, the above design is adopted, but the structure is not limited to this, and a satin weave design may be used, and the crimp of the weft may be longer or shorter. Since the twill weave design can increase the limit number of wefts to be driven in compared with the satin weave design, the number of wefts can be increased if ventilation is not a problem, which is advantageous when it is desired to improve fiber supportability. Next, looking at the lower layer side fabric, the lower layer side warps 1 and 2, 3 and 4, 5 and 6, 7 and 8
It can be seen that is a plain weave ridge weave structure arranged in the same structure. It is possible to reduce the mesh thickness, and it is particularly suitable for papermaking fabrics for tissue production. In an actual woven fabric, the lower layer side warp yarns 1 and 2 are arranged in close contact with each other on the lower side between the upper layer side warp yarns 1 and 2. Compared with the case where one thick warp having a cross-sectional area of two is arranged, the advantage of using the ridge weave structure is the same as when using a yarn having a flat cross section, so the net thickness is reduced. It is possible, and there is a point that the weft wear type is formed. Next, the connecting portion will be described. As can be seen from the drawings, in this embodiment, the upper layer side warp yarns 1 and 5 and the lower layer side warp yarns 1 and 5 function as binding yarns. In the upper layer side warp 5 and the lower layer side warp 5, the intersecting portion with the weft 9 ′ is a binding portion, and the upper layer side warp 5 passes below the lower layer side weft 9 ′ (illustrated by □. ) And weave the lower layer side weft 9 ′ from the lower layer side, and the lower layer side warp 5 passes above the upper layer side weft 9 ′ (illustrated by ▲) to make the upper layer side weft 9 ′ from the upper layer side. The upper layer side fabric and the lower layer side fabric are joined by weaving. By the way, as described above, the upper layer side warp has a design in which it passes under the three continuous upper layer side wefts and then passes over the upper side of one upper layer side weft, and the lower layer side warp is a plain weave. Because it is an organization,
The upper layer side weft 9 ′ should be woven from the upper layer side warp 5 from the upper layer side, and the lower layer side weft 9 ′ should be woven from the lower layer side warp 5 from the lower layer side. Should be. Therefore, the upper layer side warp that functions as a binding yarn goes to the lower layer side without weaving once the upper layer side weft which is originally to be woven by the upper layer side warp on the upper layer side fabric structure, The lower layer side wefts, which should originally be woven by the lower layer side warp, weave the lower layer side wefts from the lower layer side, and the lower layer side warp that functions as a binding yarn is such that the upper layer side warp moves toward the lower layer side. In the portion in which the side wefts are woven from the lower layer side, the lower layer side woven fabric is designed so that the lower layer side wefts should be woven from the lower layer side to the upper layer side without weaving the lower layer side weft once. It can be well understood that the upper surface side weft, which should have been originally woven by the upper surface side warp, is woven from the upper surface side in the layer surface side fabric design. Further, the upper layer side warp descends to the lower layer side and the support of the warp is lost, and in the prior art, there is local excessive dehydration, which causes problems such as fiber carryback and splash. , The lower surface side warp rises to the upper surface side to compensate for it instead of the upper surface side warp, and also on the lower layer side, the lower layer side warp rises to the upper layer surface side to supplement the upper layer surface. It is well understood that the part where the lower layer side warp does not exist is supplemented by the upper layer side warp descending to the lower layer side, and the upper layer side warp and the lower layer side warp complement each other. it can. In addition, the positions where the wefts are woven in complement to each other are as follows: the upper layer side warp is the lower layer side weft that the lower layer side warp should originally weave, and the lower layer side warp is the upper layer surface that the upper layer side warp should originally weave. Since it is a side weft, the upper layer side design and the lower layer side design do not substantially collapse, and the wire mark characteristics and the like are improved. In this example, the ratio of the upper layer side wefts to the lower layer side wefts was 2: 1 and the warps functioning as binding yarns were arranged at a ratio of 1/4.
After weaving the upper layer side weft 3 times from the upper layer side, the lower layer side weft is woven from the lower layer side toward the lower layer side, and the lower layer side warp is the lower layer side weft. After weaving 3 times from the above, the upper layer side weft is woven from the upper layer side toward the upper layer side. Of course, it is not limited to this, but this ratio is preferable because it has a good balance of ventilation, rigidity, wire mark property, and the like. If you want to increase the binding strength of the upper and lower fabrics, you can increase the ratio of the warp that functions as a binding thread or increase the number of binding sections, and if you want to increase the air permeability, it will function as a binding thread. All that is required is to reduce the ratio of warp threads and the number of knots. Figure 2
[Fig. 2] is a cross-sectional view taken along a warp taken along the line AA 'in Fig. 1. The upper surface side warp and the lower surface side warp are complementary to each other. It can be well understood that there is always a warp yarn, and there is no portion where the warp yarn lurks on the lower layer surface side, causing local excessive dehydration and causing problems such as fiber carryback and splash.

Conventional Example FIG. 3 is a design diagram showing a complete structure of a conventional example disclosed in European Patent EP0889160A1. FIG. 4 is a cross-sectional view taken along a warp taken along the line BB ′ of FIG. As can be seen from the drawing, the basic structure of the upper and lower fabrics is the same as that of the example, but the structure of the connecting portion is different,
There was a problem. The upper layer side warps 1 and 5 function as a binding yarn, and the upper layer side warp 5 has a binding portion at an intersection with the weft 11 ′. The upper surface side warp 5 descends downward between the portions in which the upper surface side wefts 9 ′ and 13 ′ are woven and passes under the lower surface side weft 11 ′ (shown by □) to form the lower surface side weft 11 ′ Is woven from the lower layer side to join the upper layer side woven fabric and the lower layer side woven fabric. At the junction,
The warp does not exist between the upper layer side weft and the lower layer side weft, and there is no support for the warp, resulting in localized excessive dehydration, which forms a part that causes problems such as fiber carryback and splash. It will be done. Further, on the lower layer side of the knotted portion, three warps of the lower layer side warp 5, 6 and the upper layer side warp 5 are closely arranged in parallel, and the design of the lower layer side collapses, so that a wire mark is generated. It was also the cause of

Actual machine test comparison The actual machine test was carried out by putting the woven fabrics of the example shown in FIG. 1 and the conventional example shown in FIG. 3 into a paper machine for actual tissue production. When the conventional woven fabric is used, the machine speed is 1,800.
At m / min, both fiber carryback and splash were large, a large number of pinholes were generated, and the papermaking speed had to be lowered, and horizontal marks on the paper were noticeable. However, problems such as individual pieces did not occur at all, and good papermaking could be performed.

[0013]

EFFECTS OF THE INVENTION The industrial two-layer woven fabric of the present invention can increase the number of weft yarns without lowering the freeness (air permeability) because of the above-mentioned constitution, and in the binding portion, Since there is no warp on the upper surface side and no local excessive dehydration occurs, fiber supportability is good, fiber carryback, splash, etc. do not occur, and wire markability also It has an excellent effect of being good.

[Brief description of drawings]

FIG. 1 is a design diagram showing a complete design of Example 1 of the present invention.

FIG. 2 is a cross-sectional view taken along a warp taken along line AA ′ in FIG.

FIG. 3 is a design diagram showing a complete design of a conventional example.

FIG. 4 is a cross-sectional view taken along a warp taken along line BB ′ of FIG.

[Explanation of symbols]

1 warp 2 warp 3 warp 4 warp 5 warp 6 warp 7 warp 8 warp 1'weft 2'weft 3'weft 4'weft 5'weft 6'weft 7'weft 8'weft 9'weft 10 'weft 11 'weft 12 'weft 13 'weft 14 'weft 15 'weft 16 'weft

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4L048 AA04 AA08 AA11 AA15 AA20                       AA22 AA24 AA25 AA37 AA39                       AB07 AB10 AB16 AB21 AB22                       AB32 AC09 BA01 BA12 CA11                       DA39                 4L055 CE32 FA22 FA23 FA30

Claims (3)

[Claims] 1. An industrial woven fabric comprising an upper layer side woven fabric comprising an upper layer side warp and an upper layer side weft, and a lower layer side fabric comprising a lower layer side warp and a lower layer side weft. The upper surface side warp is not woven at the location where the upper surface side weft is woven in the upper surface side weft at one location or a plurality of locations where the warp is a complete design, and the upper surface side weft is not woven at the portion and the upper surface side weft is not woven into the lower surface side without crossing the upper surface side weft. The upper layer warp is a lower layer side warp that functions as a binding yarn by weaving the lower layer side weft from the lower layer side toward the upper layer side toward the upper layer side, and the lower layer side warp is the upper layer side warp. Is a portion in which the lower layer side weft is woven from the lower side, and the lower layer side warp that weaves the lower layer side weft in terms of the woven structure does not weave the lower layer side weft, and the upper layer side warp moves toward the upper layer side. Weaving the upper layer side weft that was not woven from the upper layer side An industrial two-layer woven fabric, which is a lower surface side warp that is incorporated and functions as a binding yarn. 2. The two industrial grades according to claim 1, wherein the upper surface side warp does not weave the upper surface side weft to be woven on the fabric structure, and the number of upper surface side wefts in the portion toward the lower surface side is one. Layered fabric. 3. The upper side fabric weave design is a repetitive design in which after passing under three upper side wefts in which upper side side warps are continuous, one upper side weft passes over the upper side. In addition, the upper layer side weft is a repeat of the design in which a long crimp is formed on the upper layer side by passing the upper side of three continuous upper layer side warps and then the lower side of one upper layer side warp is passed. The two-layer industrial woven fabric according to claim 1 or 2, wherein the layer side fabric structure is a plain weave structure having a ridge weave structure in which two lower layer side warps are arranged in parallel in the same structure.