Double-layer fabric for industrial use

Abstract

The object of the present invention is to reduce the wear of the binding yarn by changing the arrangement of the warp yarns and the binding warp yarns, and to reduce the generation of dehydration marks by uniform dehydration. In the complete weave of an industrial double-layer fabric, there are: a first warp yarn pair formed by a surface warp yarn and a back warp yarn, and a second warp yarn pair formed by a surface-side binding warp yarn and a back-side binding warp yarn having the function of joining the surface-side fabric and the back-side fabric, and having the following structure: at a position where one binding warp yarn constituting the second warp yarn pair continuously forms a plurality of weave points on the surface-side fabric, the other binding warp yarn does not appear on the surface side, and at a position where the other binding warp yarn continuously forms a plurality of weave points on the surface-side fabric, the said one binding warp yarn does not appear on the surface side, so as to complement each other. The surface warp yarn and the binding warp yarn are formed of yarns having substantially the same yarn diameter, and the back warp yarn is formed of a yarn having a larger yarn diameter than the surface warp yarn and the binding warp yarn.

Description

[0001] This application is a divisional application of Patent Application No. 201980023501.2, titled "Double-layer Fabric for Industrial Use", filed with the Chinese Patent Office on March 13, 2019. Technical Field

[0002] The present invention relates to a double-layer fabric for industrial use having a warp-knitted warp, and particularly to an excellent double-layer fabric for industrial use that can improve the high adhesion between the surface fabric and the back fabric and the support force of the weft yarn, and can reduce the dehydration marks generated during papermaking. Background Art

[0003] Heretofore, as industrial fabrics, fabrics woven with warp and weft using binding yarns have been widely used. For example, there are fabrics for papermaking, conveyor belts, filter cloths, etc., and fabric characteristics suitable for the use and usage environment are respectively required. Among these fabrics, the requirements for the papermaking fabric used in the papermaking process such as dehydrating raw materials using the mesh of the fabric are particularly strict. For example, a fabric having excellent surface smoothness in which dehydration marks of the fabric are hardly transferred to the paper, and a dewatering property for sufficiently and uniformly dewatering the excess water contained in the raw material, a rigidity and abrasion resistance such that it can be suitably used even in a harsh environment, and a fabric that can maintain the conditions required for manufacturing good paper for a long time are required. In addition, fiber supportability, improvement of papermaking yield, dimensional stability, traveling stability, etc. are also required. Moreover, in recent years, papermaking machines have been continuously speeded up, and therefore, the requirements for papermaking fabrics have become more stringent accordingly.

[0004] If the papermaking fabric, which is the most strictly required among double-layer fabrics for industrial use, is described, the requirements and solutions for almost all current industrial fabrics can be understood. Therefore, the following will be described by taking the papermaking fabric as an example. In a double-layer fabric for industrial use in which the surface-side fabric and the back-side fabric are joined by a warp-knitted warp, it is known that wear occurs at the contact portion between the surface-side fabric and the back-side fabric during the travel of the papermaking machine. Especially in recent years, with the speeding up of the papermaking machine, the occurrence of internal wear has increased. When internal wear occurs, since the surface of the yarn inside the fabric becomes fuzzed, the air permeability of the mesh decreases, which causes a decrease in the dehydration speed. As a method for preventing such internal wear, a method of increasing the adhesion between the surface-side fabric and the back-side fabric is known. For example, as a method of increasing the adhesion between the surface-side fabric and the back-side fabric, there is a method of increasing the number of warp-knitted warps (see Patent Document 1).

[0005] For example, if the number of warp-knitted warps is increased and the knitting ratio in the complete weave is increased, the adhesion is improved because the yarns joining the surface-side fabric and the back-side fabric increase.

[0006] However, when the knuckle ratio is increased by the above method, dehydration marks are easily generated in the surface fabric. That is, the industrial double-layer fabric including the knuckle warp yarn generally has a structure in which the surface warp yarn does not form a knuckle at the position where the knuckle is to be formed on the surface fabric, and the back warp yarn forms a knuckle on the surface fabric (see Patent Document 2).

[0007] In this way, the surface warp yarns collapse at the locations where the weave points of the surface warp yarns are supplemented by the back warp yarns, so the warp yarn density is actually doubled. Since the warp yarn density increases, this portion becomes a dehydration obstruction site. Moreover, in such a fabric structure, if the number of binding warp yarns is increased and the binding ratio is improved, the dehydration obstruction sites are evenly arranged, and since dehydration obstruction lines are formed according to the shape of the arrangement, dehydration marks are formed on the surface of the paper.

[0008] Here, in order to prevent the dehydration obstruction parts caused by the binding warp yarn from being dense, a method of increasing the number of weft yarns in the complete structure and forming the longitudinal direction in the complete structure to be long is considered. With such a structure, the density of the dehydration obstruction parts can be reduced. On the other hand, if such a structure is adopted in a normal structure, one binding warp yarn will continuously form multiple tissue points on the surface side fabric. Moreover, in the case of a structure in which one binding warp yarn continuously forms multiple tissue points on the surface side fabric, it is known that the fabric shape becomes a mountain shape with the central part of the continuous multiple tissue points as the vertex. For example, the warp yarn forms a tissue point on the surface side fabric by passing over the weft.

[0009] In such a weaving structure, the stress generated in the yarns causes the yarns to deform into a mountain shape with the weft yarn located in the center as the vertex. In addition, sometimes the warp yarns form long weave points on multiple weft yarns. Even in such a weaving structure, the stress generated in the yarns causes the yarns to change into a mountain shape with the weft yarn located in the center as the vertex.

[0010] The even arrangement of the mountain-shaped protruding parts not only marks the dehydration, but also causes the surface smoothness of the fabric to deteriorate. In order to solve such a problem, there is a fabric disclosed in Patent Document 3. In addition, it is also possible to develop the fabric disclosed in Patent Document 3 and arrange the groups of binding warp yarns adjacent to each other into two groups.

[0011] Here, in order to maintain the surface smoothness of the above-mentioned fabric, the wire diameter of the binding warp yarn needs to be matched with the wire diameter of the surface warp yarn. In the above-mentioned fabric, the binding warp yarn is arranged adjacent to one or more upper and lower warp yarns, and two binding warp yarns are used as a group, and they are woven while repeatedly crossing and supplementing the front and back fabric structures. Therefore, the dehydration path is closed by the intersection formed at a certain period in the longitudinal direction, and a difference in dehydration speed occurs with other parts. Due to this effect, dehydration marks will appear on the paper.

[0012] In addition, in industrial double-layer fabrics using binding warp yarns, in order to cope with abrasion resistance, thick-diameter yarns are generally used as the back weft yarns. Therefore, thick-diameter yarns with the same yarn diameter as the back weft yarns are also used for the back warp yarns. Therefore, when two or more thick-diameter yarns are arranged, there are parts with a wide space for the binding warp yarns on the back side located at the non-crossing parts of the adjacent binding warp yarns, and parts with a narrow space for the thick back warp yarns with different yarn diameters for the upper and lower warp yarns. Therefore, there is a difference in the dehydration speed, which further promotes the generation of the above-mentioned dehydration marks.

[0013] That is, in a fabric formed by joining the conventional front and back fabrics with binding warp yarns, in order to maintain the surface smoothness, both the warp yarns and weft yarns on the surface need to form a dense surface by using yarns with a smaller diameter than the yarns constituting the back side, and the shape of the weave points formed on the surface is unified. In addition, in order to join the front and back sides by forming weave points on both the front and back sides and maintain the surface smoothness, the yarn diameter of the binding warp yarns must be of the same degree as that of the warp yarns on the surface side.

[0014] In addition, in order to improve the rigidity and abrasion resistance of the fabric and suppress the elongation in the longitudinal direction, the yarn diameter of the weft yarns on the back side must be large. In addition, the back warp yarns must be made thick in order to weave the large-diameter weft yarns on the back side. In addition, the arrangement of the yarns also adopts a form in which the warp yarns on the surface side and the warp yarns on the back side are set as a group, and the surface-side binding warp yarns and the back-side binding warp yarns are arranged between the groups. Generally, the ratio of the number of the back warp yarns to the number of the back-side bindings is set to 1:1. Therefore, there are differences in the space at the binding part, the space of the warp yarns on the surface side and the warp yarns on the back side, and there is a problem that the periodicity of the crossing of the binding warp yarns becomes large, which promotes the generation of dehydration marks.

[0015] Prior Art Documents

[0016] Patent Document 1: Japanese Patent Application Laid-Open No. 2001-98483

[0017] Patent Document 2: Japanese Patent Application Laid-Open No. 2003-342889

[0018] Patent Document 3: Japanese Patent Application Laid-Open No. 2006-57216 Summary of the Invention

[0019] An object of the present invention is to provide an industrial double-layer fabric using binding warp yarns, which does not impair the characteristics required hitherto, namely, surface smoothness, abrasion resistance on the back side, longitudinal stretch resistance, and water repellency, and improves the high density of the front and back fabrics and the supporting force of the weft yarns.

[0020] In addition, an object of the present invention is to reduce the wear of the binding yarn by changing the arrangement of the warp yarns and the binding warp yarns, and at the same time reduce the generation of dehydration marks by uniform dehydration.

[0021] In order to solve the above problems of the prior art, the present invention adopts the following structure.

[0022] (1) An industrial double-layer fabric is an industrial double-layer fabric in which a surface-side fabric made of surface warp yarns and surface weft yarns and a back-side fabric made of back warp yarns and back weft yarns are joined by binding warp yarns. It is characterized in that in the complete weave of the industrial double-layer fabric, there are: a first warp yarn pair formed by surface warp yarns and back warp yarns, and a second warp yarn pair formed by surface-side binding warp yarns and back-side binding warp yarns having the function of joining the surface-side fabric and the back-side fabric, and having the following structure: at a portion where one binding warp yarn constituting the second warp yarn pair continuously forms a plurality of weave points on the surface-side fabric, the other binding warp yarn does not appear on the surface side, and at a portion where the other binding warp yarn continuously forms a plurality of weave points on the surface-side fabric, the one binding warp yarn does not appear on the surface side, so as to complement each other. The surface warp yarns and the binding warp yarns are formed of yarns having substantially the same yarn diameter, and the back warp yarns are formed of yarns having a larger yarn diameter than the surface warp yarns and the binding warp yarns.

[0023] By adopting the above structure, the present invention can improve the rigidity and wear resistance of the fabric. That is, in the industrial double-layer fabric of the present invention, since the yarn diameter of the warp yarns on the back side is larger than the yarn diameter of the warp yarns on the surface side, the diameter of the weft yarns woven with the thick warp yarns on the back side can also be thickened.

[0024] (2) The industrial double-layer fabric according to the above (1), characterized in that a second warp yarn pair is arranged between the first warp yarn pairs.

[0025] By adopting the above structure, the present invention can change the arrangement of the warp yarns and the binding warp yarns and reduce the wear of the binding yarns.

[0026] (3) The industrial double-layer fabric according to the above (1) or (2), characterized in that in the industrial double-layer fabric, the ratio of the surface warp yarns to the back warp yarns is 1:1.

[0027] (4) The industrial double-layer fabric according to the above (2) or (3), characterized in that two groups of the second warp yarn pairs are arranged adjacent to each other, and first warp yarn pairs are arranged on both sides of the second warp yarn pairs, and this arrangement is repeatedly arranged.

[0028] Such a structure arranges two sets of the second warp yarn pairs side by side. That is, a total of four binding warp yarns are arranged. It is characterized in that the first warp yarn pair is arranged on both sides of the second warp yarn pair. In short, the feature of the present invention is that the first warp yarn pair is arranged on both sides of the two sets of the second warp yarn pairs, and such four sets of warp yarn pairs are repeatedly arranged.

[0029] By adopting the above structure, the present invention solves the problem of promoting the generation of dehydration marks. That is, in the present invention, two sets of second warp yarn pairs having binding parts are arranged at positions adjacent to the first warp yarn pair, and this method is repeated. As a result, one or more binding yarns with a smaller diameter are necessarily adjacent to one side of one back warp yarn. Therefore, the closing of the dehydration path is suppressed, and thus uniform dehydration is achieved, and the generation of dehydration marks can be reduced.

[0030] (5) The industrial double-layer fabric according to any one of the above (1) to (4), characterized in that the cross-sectional shape of the surface warp yarn, surface weft yarn, back warp yarn, back weft yarn or binding warp yarn is circular, star-shaped, quadrilateral or elliptical.

[0031] By adopting the industrial double-layer fabric of the present invention, the effect of providing the following fabric can be exerted. The fabric improves the high density combination of the surface and back fabrics and the supporting force of the weft yarns without impairing the surface smoothness, the wear resistance on the back side, the longitudinal stretch resistance and the water dehydration performance.

[0032] In addition, by adopting the industrial double-layer fabric of the present invention, by changing the arrangement of the warp yarns and the binding warp yarns, a fabric that reduces the wear of the binding yarns and becomes uniform dehydration, thereby reducing the generation of dehydration marks, is provided. Description of the Drawings

[0033] Figure 1 It is a design drawing showing the complete weave of Embodiment 1 of the industrial double-layer fabric of the present invention.

[0034] Figure 2 It is Figure 1 A cross-sectional conceptual diagram in the warp direction of the warp yarn pairs 1 to 4 of the shown Embodiment 1.

[0035] Figure 3 It is a design drawing showing the complete weave of Embodiment 2 of the industrial double-layer fabric of the present invention.

[0036] Figure 4 It is Figure 3 A cross-sectional conceptual diagram in the warp direction of the warp yarn pairs 1 to 4 of the shown Embodiment 2.

[0037] Figure 5 It is a design drawing showing the complete weave of Embodiment 3 of the industrial double-layer fabric of the present invention.

[0038] Figure 6 It isFigure 5 Cross-sectional conceptual diagram of warp directions of warp pairs 1 to 4 of the shown Embodiment 3.

[0039] Figure 7 It is a design drawing of a complete weave of Embodiment 4 of the industrial double-layer fabric of the present invention.

[0040] Figure 8 is Figure 7 Cross-sectional conceptual diagram of warp directions of warp pairs 1 to 4 of the shown Embodiment 4. Detailed implementation mode

[0041] Hereinafter, the industrial double-layer fabric of the present invention will be described in detail.

[0042] In the complete weave of the industrial double-layer fabric of the present invention, the surface-side fabric made of surface warps and surface wefts and the back-side fabric made of back warps and back wefts are joined by the interlacing warps. The complete weave of the industrial double-layer fabric of the present invention is composed of a first warp pair and a second warp pair. The first warp pair is formed by a surface warp and a back warp, and the second warp pair is formed by arranging two interlacing warps having the function of joining the surface-side fabric and the back-side fabric adjacent to each other.

[0043] Here, it has the following structure: at the part where one interlacing warp of the second warp pair continuously forms a plurality of weave points on the surface-side fabric, the other interlacing warp does not appear on the surface side, and at the part where the other interlacing warp continuously forms a plurality of weave points on the surface-side fabric, the one interlacing warp does not appear on the surface side, so as to complement each other. That is, the second warp pair forms one weave on the surface-side fabric while being supplemented by two interlacing warps. In addition, the interlacing warps are sometimes defined as surface-side interlacing warps that mainly weave the surface side and function as interlacing yarns, and back-side interlacing warps that mainly weave the back side and function as interlacing yarns.

[0044] In addition, the surface warp and the interlacing warp are formed of yarns having substantially the same diameter. And it is characterized in that the back warp is formed of yarn having a larger linear diameter than the surface warp and the interlacing warp. The complete weave of the industrial double-layer fabric of the present invention is premised on 8 shafts or more.

[0045] In addition, the complete weave of the industrial double-layer fabric of the present invention is characterized in that the first warp pair and the second warp pair are alternately arranged. In addition, the complete weave of the industrial double-layer fabric of the present invention is characterized in that the first warp pair is arranged on both sides of the second warp pair.

[0046] Furthermore, the complete weave of the industrial double-layer fabric of the present invention is characterized in that the ratio of the surface warp to the back warp is 1:1.

[0047] The yarn used in the industrial double-layer fabric of the present invention can be selected according to its use. For example, in addition to monofilaments, multifilaments, spun yarns, and processed yarns such as texturized yarns, bulked yarns, and stretch yarns that have been subjected to twisting processing, bulk processing, etc., which are generally referred to as deformed yarns, bulked yarns, and stretch yarns, or yarns combined by twisting them together, etc., can also be used. In addition, the cross-sectional shape of the yarn is not only circular, but also short-shaped yarns such as quadrilateral and star-shaped, elliptical-shaped, hollow, etc. yarns can be used. In addition, the material of the yarn can be freely selected, and polyester, polyamide, polyphenylene sulfide, polyvinylidene fluoride, polypropylene, aramid, polyether ether ketone, polyethylene naphthalate, polytetrafluoroethylene, cotton, wool, and metals, etc. can be used. Of course, yarns obtained by incorporating various substances into copolymers and the above-mentioned materials according to the purpose can also be used. As the papermaking yarn, generally, the surface warp yarn, the back warp yarn, the binding warp yarn, and the surface weft yarn preferably use polyester monofilaments with rigidity and excellent dimensional stability. In addition, for the lower side weft yarn that requires abrasion resistance, a yarn woven by alternately arranging polyester monofilaments and polyamide monofilaments, etc., can improve abrasion resistance while ensuring rigidity, and thus is preferred.

[0048] Hereinafter, embodiments of the industrial double-layer fabric of the present invention will be described. The embodiments shown below are examples of the present invention and do not limit the present invention.

[0049] Embodiments of the industrial double-layer fabric of the present invention will be described with reference to the drawings. Figures 1 to 8 It is a design drawing showing Embodiments 1 to 4 of the industrial double-layer fabric of the present invention. The design drawing refers to the smallest repeating unit of the fabric structure, and this complete structure is connected up, down, left, and right to form the overall structure of the fabric. In the design drawing, the warp yarns are represented by Arabic numerals such as 1, 2, 3... In this embodiment, there is a first warp yarn pair made of a surface warp yarn and a back warp yarn, and a second warp yarn pair formed by arranging two binding warp yarns adjacent to each other in two groups. The weft yarns are represented by Arabic numerals with a prime such as 1', 2', 3'...

[0050] In addition, the × mark indicates that the surface warp yarn is on the upper side of the surface weft yarn, the ○ mark indicates that the back warp yarn is on the lower side of the back weft yarn, the □ mark indicates that the back side binding warp yarn is on the lower side of the back weft yarn, the ▲ mark indicates that the back side binding warp yarn is on the upper side of the surface weft yarn, the △ mark indicates that the surface side binding warp yarn is on the lower side of the back weft yarn, and the ■ mark indicates that the surface side binding warp yarn is on the upper side of the surface weft yarn. There are parts where the surface warp yarn and the back warp yarn, and the surface weft yarn and the back weft yarn are overlapped and arranged up and down. In the design drawing, the lines are arranged exactly overlapped up and down, but this is for convenience of illustration, and they can also be offset in the actual fabric.

[0051] Embodiment 1

[0052] Figure 1This is a design drawing showing the complete weave of Embodiment 1 of the industrial double-layer fabric of the present invention. The complete weave of the industrial double-layer fabric of Embodiment 1 consists of a first warp pair and a second warp pair. The first warp pair is composed of surface warps (1, 4, 5, 8, 9, 12) and back warps (1, 4, 5, 8, 9, 12) without interlacing warps, and the second warp pair includes surface-side interlacing warps (2, 3, 6, 7, 10, 11) and back-side interlacing warps (2, 3, 6, 7, 10, 11) with interlacing functions.

[0053] The first warp pair 1 alternately weaves surface wefts so that the surface warps form a plain weave on the surface-side fabric, and the back warps weave the back wefts as shown by the back warp 1 in Figure 2 to form a 1 / 4 - 1 / 3 weave on the back-side fabric. The same weave exists in the first warp pairs 4, 5, 8, 9.

[0054] In addition, at positions adjacent to each first warp pair, a second warp pair must be arranged. For example, two groups of second warp pairs (2, 3) are arranged at positions adjacent to the first warp pair 1. Specifically, as shown in Figure 2 , the surface-side interlacing warp 2 in the second warp pairs 2, 3 passes under the surface weft 1' and over the surface wefts 2', 4', then passes under the back wefts 7', 11', and further passes over the surface wefts 14', 16', 18' to form weave points. The back-side interlacing warp 2 in the second warp pairs 2, 3 passes over the back weft 1' and under the back weft 2', then passes over the surface wefts 6', 8', 10', 12', and further passes under the back weft 16' to interlace the surface-side fabric and the back-side fabric.

[0055] In addition, the second warp pairs 2, 3 are also arranged at positions adjacent to the first warp pair 4. The surface warp 4 in the first warp pair forms a plain weave on the surface-side fabric. The surface-side interlacing warp 3 in the second warp pairs 2, 3 passes over the surface wefts 1', 3', 5', 7', then passes under the back wefts 10', 14', and passes over the surface weft 17' to form weave points. The back-side interlacing warp 3 in the second warp pairs 2, 3 passes under the back weft lines 1' and 5', then passes over the surface weft lines 9', 11', 13', 15' to interlace the surface-side fabric and the back-side fabric.

[0056] In addition, the second warp pairs 6, 7 are arranged at positions adjacent to the first warp pair 5, and the second warp pairs 6, 7 are also arranged at positions adjacent to the first warp pair 8. In addition, the second warp pairs 10, 11 are arranged at positions adjacent to the first warp pair 9, and the second warp pairs 10, 11 are also arranged at positions adjacent to the first warp pair 12.

[0057] By adopting such a structure, the small-diameter binding warp yarns are necessarily arranged beside the back warp yarns with a large diameter, so a uniform dehydration speed can be ensured, and thus an effect of reducing the generation of dehydration marks can be produced. It is possible to ensure properties such as wear resistance on the back side and longitudinal stretch resistance, and the adhesion between the surface fabric and the back fabric can also be improved.

[0058] Embodiment 2

[0059] Figure 3 It is a design drawing showing the complete weave of Embodiment 2 of the industrial double-layer fabric of the present invention. The complete weave of the industrial double-layer fabric of Embodiment 2 is composed of a first warp yarn pair and a second warp yarn pair. The first warp yarn pair consists of surface warp yarns (1, 4, 5, 8, 9, 12) without binding warp yarns and back warp yarns (1, 4, 5, 8, 9, 12), and the second warp yarn pair includes surface-side binding warp yarns (2, 3, 6, 7, 10, 11) and back-side binding warp yarns (2, 3, 6, 7, 10, 11) having a binding function.

[0060] The first warp yarn pair 1 alternately weaves the surface weft yarns so that the surface warp yarns form a plain weave on the surface fabric, and the back warp yarns weave the back weft yarns as shown by the back warp yarn 1 of Figure 4 to form a 1 / 4 - 1 / 3 weave on the back fabric. The same weave also exists in the first warp yarn pairs 4, 5, 8, 9, 12.

[0061] In addition, the second warp yarn pair is necessarily arranged at a position adjacent to each first warp yarn pair. For example, at a position adjacent to the first warp yarn pair 1, the second warp yarn pairs 2, 3 are arranged. Specifically, as shown by Figure 4 , the surface-side binding warp yarn 2 in the second warp yarn pairs 2, 3 passes under the surface weft yarn 1' and over the surface weft yarns 2', 4', then passes under the back weft yarn 7', and further passes over the surface weft yarns 10', 12', 14', 16', 18' to form weave points. The back-side binding warp yarn 2 in the second warp yarn pairs 2, 3 passes over the back weft yarn 1' and under the back weft yarn 2', then passes over the surface weft yarns 6', 8', and further passes under the back weft yarns 11', 16' to bind the surface fabric and the back fabric.

[0062] In addition, second warp pairs 2 and 3 are also arranged at positions adjacent to the first warp pair 4. The surface warp 4 in the first warp pair forms a plain weave on the surface-side fabric. The surface-side binding warp 3 in the second warp pairs 2 and 3 passes above the surface wefts 1', 3', 5', 7', 9', and 11', then passes below the back weft 14', and passes above the surface weft 17' to form weave points. The back-side binding warp 3 in the second warp pairs 2 and 3 passes below the back warps 1', 5', and 10', then passes above the surface warps 13' and 15' to bind the surface-side fabric and the back-side fabric.

[0063] In addition, second warp pairs 6 and 7 are arranged at positions adjacent to the first warp pair 5, and second warp pairs 6 and 7 are also arranged at positions adjacent to the first warp pair 8. In addition, second warp pairs 10 and 11 are arranged at positions adjacent to the first warp pair 9, and second warp pairs 10 and 11 are also arranged at positions adjacent to the first warp pair 12.

[0064] By adopting such a structure, a small-diameter binding warp is surely arranged beside the large-diameter back warp, so a uniform dehydration speed can be ensured, and thus an effect of reducing the generation of dehydration marks can be produced. The properties such as wear resistance on the back side and longitudinal stretch resistance can be ensured, and the adhesion between the surface-side fabric and the back-side fabric can also be improved.

[0065] Embodiment 3

[0066] Figure 5 It is a design drawing of the complete weave of Embodiment 3 of the industrial double-layer fabric of the present invention. The complete weave of the industrial double-layer fabric of Embodiment 3 is composed of a first warp pair and a second warp pair. The first warp pair consists of a surface warp (1, 4, 5, 8) and a back warp (1, 4, 5, 8) without a binding warp, and the second warp pair includes a surface-side binding warp (2, 3, 6, 7) and a back-side binding warp (2, 3, 6, 7) with a binding function.

[0067] The first warp pair 1 alternately weaves the surface wefts, so that the surface warp forms a plain weave on the surface-side fabric, and the back warp weaves the back wefts as shown by the back warp 1 Figure 6 to form a 1 / 4 - 1 / 4 - 1 / 5 weave on the back-side fabric. The same weave exists in the first warp pairs 4, 5, and 8.

[0068] In addition, a second warp pair is surely arranged at a position adjacent to each first warp pair. For example, second warp pairs 2 and 3 are arranged at positions adjacent to the first warp pair 1. Specifically, as Figure 6As shown, among the second warp yarn pairs 2 and 3, the surface-side binding warp yarn 2 passes above the surface weft yarns 2', 4', 6', and 8', then passes below the back weft yarn 11', and then passes above the surface weft yarn 16'. Moreover, among the second warp yarn pairs 2 and 3, the back-side binding warp yarn 2 passes below the back weft yarns 1' and 6', then passes above the surface weft yarns 10', 12', and 14' to bind the surface-side fabric and the back-side fabric.

[0069] In addition, second warp yarn pairs 2 and 3 are also arranged at positions adjacent to the first warp yarn pair 4. The surface-side binding warp yarn 3 in the second warp yarn pair passes above the surface weft yarns 1' and 3', then passes below the back weft yarn 7', and then passes above the surface weft yarns 13' and 15'. The back-side binding warp yarn 3 in the second warp yarn pair 3 passes below the back weft yarn 2', then passes above the surface weft yarns 5', 7', 9', and 11', and then passes below the back weft yarn 13' to bind the surface-side fabric and the back-side fabric. In addition, second warp yarn pairs 6 and 7 are arranged at positions adjacent to the first warp yarn pair 5, and second warp yarn pairs 6 and 7 are also arranged at positions adjacent to the first warp yarn pair 8.

[0070] By adopting such a structure, a small-diameter binding warp yarn is surely arranged beside the large-diameter back warp yarn, so a uniform dehydration speed can be ensured, and thus an effect of reducing the generation of dehydration marks can be produced. Properties such as wear resistance on the back side and longitudinal stretch resistance can be ensured, and the adhesion between the surface-side fabric and the back-side fabric can also be improved.

[0071] Embodiment 4

[0072] Figure 7 It is a design drawing showing the complete weave of Embodiment 4 of the industrial double-layer fabric of the present invention. The complete weave of the industrial double-layer fabric of Embodiment 4 is composed of a first warp yarn pair and a second warp yarn pair. The first warp yarn pair consists of surface warp yarns 1, 4, 5, and 8 and back warp yarns 1, 4, 5, and 8 without binding warp yarns, and the second warp yarn pair includes surface-side binding warp yarns 2, 3, 6, and 7 and back-side binding warp yarns 2, 3, 6, and 7 having a binding function.

[0073] The first warp yarn pair 1 weaves the surface weft yarns such that the surface warp yarns form a 2 / 2 weave on the surface-side fabric, and the back warp yarns weave the back weft yarns as shown by the back warp yarn 1 Figure 8 to form a 1 / 4 - 1 / 4 - 1 / 5 weave on the back-side fabric. The same weave exists in the first warp yarn pair 5. In addition, the first warp yarn pair 4 alternately weaves the surface weft yarns such that the surface warp yarns form a plain weave on the surface-side fabric, and the back warp yarns are as shown in Figure 8The weft yarns of the back shown by the warp yarn 4 of the back form a 1 / 4 - 1 / 4 - 1 / 5 structure on the back - side fabric. The same structure is also present in the first warp yarn pair 8.

[0074] In addition, a second warp - yarn pair must be arranged at positions adjacent to each first warp - yarn pair. For example, second warp - yarn pairs 2 and 3 are arranged at positions adjacent to the first warp - yarn pair 1. Specifically, as Figure 8 shown, the surface - side binding warp yarn 2 in the second warp - yarn pairs 2 and 3 passes above the surface weft yarns 2', 4', 6', 8', then passes below the back weft yarn 11', and then passes above the surface weft yarn 16'. Moreover, the back - side binding warp yarn 2 in the second warp - yarn pairs 2 and 3 passes below the back weft yarns 1' and 6', then passes above the surface weft yarns 10', 12', 14' to bind the surface - side fabric and the back - side fabric.

[0075] In addition, second warp - yarn pairs 2 and 3 are also arranged at positions adjacent to the first warp - yarn pair 4. The surface - side binding warp yarn 3 in the second warp - yarn pairs passes above the surface weft yarns 1' and 2', then passes below the back weft yarns 5' and 10', and then passes above the surface weft yarns 13' and 14'. The back - side binding warp yarn 3 in the second warp - yarn pairs 2 and 3 passes above the surface weft yarns 5' and 6', passes below the surface weft yarns 7' and 8', passes above the surface weft yarns 9' and 10', and then passes below the back weft yarn 15' to bind the surface - side fabric and the back - side fabric. In addition, second warp - yarn pairs 6 and 7 are arranged at positions adjacent to the first warp - yarn pair 5, and second warp - yarn pairs 6 and 7 are also arranged at positions adjacent to the first warp - yarn pair 8.

[0076] By adopting such a structure, small - diameter binding warp yarns are necessarily arranged beside the large - diameter back warp yarns, so a uniform dehydration speed can be ensured, and thus the effect of reducing the generation of dehydration marks can be achieved. The wear resistance and longitudinal stretch resistance of the back - side can be ensured, and the adhesion between the surface - side fabric and the back - side fabric can also be improved.

[0077] Explanation of Reference Numerals

[0078] Warp yarns 1 - 12

[0079] Weft yarns 1' - 18'

Claims

1. An industrial double-layer fabric is an industrial double-layer fabric that joins a surface-side fabric made of surface warp yarns and surface weft yarns and a back-side fabric made of back warp yarns and back weft yarns through interlacing warp yarns. It is characterized in that in the complete weave of this industrial double-layer fabric, there are: a first warp-yarn pair formed by surface warp yarns and back warp yarns, and a second warp-yarn pair formed by surface-side interlacing warp yarns and back-side interlacing warp yarns having the function of joining the surface-side fabric and the back-side fabric. And it has the following structure: at the part where one interlacing warp yarn constituting the second warp-yarn pair continuously forms a plurality of weave points on the surface-side fabric, the other interlacing warp yarn does not appear on the surface side, and at the part where the other interlacing warp yarn continuously forms a plurality of weave points on the surface-side fabric, the one interlacing warp yarn does not appear on the surface side, thus complementing each other. The surface warp yarns and the interlacing warp yarns are formed by yarns with the same linear diameter. The back warp yarns are formed by yarns with a larger linear diameter than the surface warp yarns and the interlacing warp yarns. Two adjacent second warp-yarn pairs are arranged between two groups of the first warp-yarn pairs, and the arrangement of the two groups of the first warp-yarn pairs and the two groups of the second warp-yarn pairs is repeated three times in the complete weave. In the back-side fabric, among the back warp yarns, interlacing warp yarns, interlacing warp yarns, and back warp yarns arranged in sequence horizontally, the adjacent back warp yarn and interlacing warp yarn form a first group and form weave points on the same back weft yarn, and then the adjacent interlacing warp yarn and back warp yarn form a second group and form weave points on the same back weft yarn.

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