Double-layered fabrics and articles containing same

Abstract

This application relates to a two-ply fabric and articles including the same.

Description

[Technical field]

[0001] [Cross-reference to related applications] This application claims the benefit of priority to Korean Patent Application No. 10-2020-0186478 filed December 29, 2020, and Korean Patent Application No. 10-2021-0184478 filed December 22, 2021, and all contents disclosed in the documents of said Korean patent applications are incorporated herein by reference.

[0002] This application relates to a double layer fabric and articles. In particular, this application relates to a gas inflatable double layer fabric having a protruding pattern, and articles (e.g., airbags, life jackets, etc.) including said double layer fabric. [Background technology]

[0003] An airbag is a device that protects a vehicle occupant when an external force such as a collision is applied to the vehicle. After a sensor detects the impact of the collision, an explosive is exploded and gas is supplied inside the airbag cushion, causing the cushion to expand.

[0004] When an airbag deploys, it may be damaged by broken glass or the vehicle interior. In particular, when a car rolls over, the side curtain airbags located close to the glass windows are most likely to be damaged, and airbags damaged by glass fragments in this way are unable to function as they should.

[0005] In the conventional technology, the impact resistance of the airbag was reinforced by layering reinforcing fabric on the airbag through sewing or bonding, but this method reduces the packaging or folding performance of the airbag and also incurs additional costs. Summary of the Invention [Problem to be solved by the invention]

[0006] It is an object of the present application to provide a gas (eg, air) inflatable double layer fabric.

[0007] Another object of the present application is to provide a gas inflatable double layer fabric having improved impact resistance, tear strength, etc.

[0008] It is yet another object of the present application to provide an article (e.g., airbag, life jacket, etc.) comprising said double layer fabric.

[0009] It is still another object of the present application to provide an airbag having excellent packaging or folding performance.

[0010] It is still another object of the present application to provide an airbag that has excellent weaving efficiency and processability, such as not requiring patching of reinforcing fabrics or additional bonding between woven fabrics.

[0011] These and other objects of the present application are all met by the present invention as described below. [Means for solving the problem]

[0012] In one embodiment of the present application, the present application relates to a double-layered fabric, said double-layered fabric comprising a first fabric layer (L1) and a second fabric layer (L2).

[0013] The first fabric layer (L1) has a predetermined pattern (P1), and the second fabric layer (L2) also has a predetermined pattern (P2). The pattern refers to the weaving method of the fabric or the visible structure of the fabric.

[0014] The double woven fabric is used in an airbag and has gas inflatability. For example, the double woven fabric can have gas inflatability by bonding two fabric layers (L1, L2). Specifically, referring to FIG. 1, the double woven fabric can be separated into a non-inflatable part (A) and an inflatable part (B) at a boundary of a bonding part (C) where a first fabric layer and a second fabric layer are bonded. That is, the double woven fabric can include a non-inflatable part (A), an inflatable part (B) and a bonding part (C), or can have a non-inflatable part (A), an inflatable part (B) and a bonding part (C). The inflatable part formed as described above can have a sealability sufficient to have gas inflatability. For example, the bonding part can be configured to withstand the pressure of the inflating gas by preventing the gas that generates gas inflation from escaping between the two separated fabric layers. Therefore, when gas flows in, the inflatable part inflates, and can protect the user from external impact.

[0015] The manner of bonding between the first and second fabric layers is not particularly limited.

[0016] In one embodiment, the second and first fabric layers may be produced by one piece weaving, i.e., two separate fabric layers may be woven simultaneously, and these fabric layers may be joined at a bonding point (or bonding section), which corresponds to the bonding section (C).

[0017] As another example, the first and second fabric layers may be manufactured together, and then parts of the fabric layers may be joined together by sewing, welding, or bonding. The area or point where the fabric layers are joined corresponds to the joint (C).

[0018] Considering process simplification and manufacturing cost reduction, it is preferable to manufacture a two-ply fabric by a one-piece woven method.

[0019] The double-layered fabric of the present application has a protruding pattern (P3). Specifically, the surface of one or more of the fabric layers (L1, L2) is provided with a protruding pattern (P3) formed integrally with the fabric layer. In this connection, the protruding pattern being formed integrally with the fabric layer means that some of the warp or weft threads used to weave the fabric layers (L1, L2) or their patterns (P1, P2) are used to form the protruding pattern (P3) and subsequently used again to weave the fabric layers' patterns (P1, P2). Such weaving is performed, for example, using a Jacquard mechanism, specifically an OPW weaving method using a Jacquard mechanism. Therefore, according to the present application, no additional steps are required, such as patching a reinforcing fabric or attaching an additional pattern after the fabric layers are manufactured.

[0020] The position of the protruding pattern (P3) on the surface of the fabric layers (L1, L2) is not particularly limited, but for example, the protruding pattern (P3) is formed locally in a specific part (area) of the fabric where a strong impact is expected to be applied when the airbag is inflated. Therefore, as confirmed in the following experimental example, the protruding pattern (P3) complements the pressure resistance performance of the localized part (area) of the fabric layers (L1, L2) that may become a breakage point when the airbag is deployed, and prevents the fabric layers from tearing.

[0021] In one example, the protruding pattern (P3) is formed on one surface of the fabric layers (L1, L2) facing each other among the surfaces forming the fabric layers (L1, L2). Referring to FIG. 1, the protruding pattern (P3) is formed on one surface (i.e., inner surface) of the fabric layers (L1, L2) that forms the inside of the inflatable part B into which gas flows and inflates. In another example, the protruding pattern (P3) is formed on a surface facing the inner surface of each of the fabric layers (L1, L2), i.e., an outer surface. In still another example, the protruding pattern (P3) may be formed on both the inner surface and the outer surface of the fabric layers (L1, L2).

[0022] In general, a resin coating layer is formed on one surface of the fabric layer as described below, but in order to prevent unevenness in the coating, it is preferable that the protruding pattern (P3) is formed on the surface opposite to the surface on which the resin coating layer is formed. For example, when a resin coating layer is formed on the outer surface of the double-layered fabric, it is preferable that the protruding pattern (P3) is formed on the inner surface of the double-layered fabric.

[0023] In a specific example of the present application, the protruding pattern (P3) may be formed in one or more pieces on the surface of one or more of the fabric layers (L1, L2), or the protruding pattern (P3) may be formed in two or more pieces on the surface of one or more of the fabric layers (L1, L2).

[0024] When multiple protruding patterns are formed on the fabric layer, each of the protruding patterns can be distinguished by the naked eye, for example, by the shape of each of the protruding patterns, the area they occupy, and / or the distance at which they are spaced apart (see FIG. 2a).

[0025] Such multiple protruding patterns may have the same or different shapes and may be repeatedly formed on the fabric layer.

[0026] In one example, the protruding pattern (P3) is formed with an interval size (or an area occupying an interval) of at least 5 to 100 threads. Here, a thread means an individual (or single) warp thread and weft thread forming the pattern (P1, P2) of the fabric layer (L1, L2). For example, when the protruding pattern is formed with the above-mentioned thread interval size, the area occupied by the protruding pattern may be a polygon (e.g., a square) or an area equivalent thereto, consisting of at least 5 threads in each of the warp and weft directions (see FIG. 2b).

[0027] Specifically, the protruding pattern (P3) is formed with an interval size (or a size occupying an interval) of, for example, 10 threads or more, 15 threads or more, 20 threads or more, 25 threads or more, 30 threads or more, 35 threads or more, 40 threads or more, or 45 threads or more. In addition, the upper limit of the interval size (or a size occupied by the protruding pattern expressed by threads) may be, for example, 95 threads or less, 90 threads or less, 85 threads or less, 80 threads or less, 75 threads or less, 70 threads or less, 65 threads or less, 60 threads or less, 55 threads or less, 50 threads or less, 45 threads or less, 40 threads or less, 35 threads or less, 30 threads or less, or 25 threads or less. When the interval size where the protruding pattern is formed is adjusted within the range of the thread interval, it is possible to prevent a decrease in weaving performance due to tension variation and ensure the impact durability of the double woven fabric.

[0028] The thread spacing of the warp and weft threads forming the protruding pattern may be adjusted independently of each other within the above range.

[0029] In one embodiment, the protruding patterns (P3) are formed at regular intervals. Specifically, the protruding patterns (P3) formed on one or more surfaces of the fabric layers (L1, L2) are formed at intervals of at least 5 to 50 threads. For example, the interval between the protruding patterns (P3) may be 10 threads or more, 15 threads or more, 20 threads or more, 25 threads or more, or 30 threads or more, and the upper limit may be, for example, 45 threads or less, 40 threads or less, 35 threads or less, 30 threads or less, 25 threads or less, 20 threads or less, 15 threads or less, or 10 threads or less.

[0030] As another example, the protrusion pattern (P3) may be repeated at regular intervals. Specifically, the protrusion patterns (P3) formed on one or more surfaces of the fabric layers (L1, L2) may be repeatedly formed at intervals of at least 5 to 50 threads.

[0031] In one example, the patterns (P1, P2) of the fabric layers on which the protruding pattern (P3) is formed may be identical to or different from each other.

[0032] The specific shape (or type) of the fabric layer patterns (P1, P2) is not particularly limited. For example, the fabric layers (L1, L2) can each independently have a pattern (P1, P2) that is a 1×1 weave, a 2×2 weave, a 3×3 weave, a satin weave, a warp rib weave, a weft rib weave, or a mixed weave thereof.

[0033] In one example, the density of the warp and weft yarns forming the patterns (P1, P2) of the fabric layers (L1, L2) may be in the range of 40 to 80 th / inch. Specifically, the density of the warp and weft yarns forming the fabric layer patterns (P1, P2) may be, for example, 46 th / inch or more, 47 th / inch or more, 48 th / inch or more, 49 th / inch or more, 50 th / inch or more, 51 th / inch or more, 52 th / inch or more, 53 th / inch or more, 54 th / inch or more, or 55 th / inch or more. The upper limit may be, for example, 70th / inch or less, 65th / inch or less, or 60th / inch or less, and specifically, 59th / inch or less, 58th / inch or less, 57th / inch or less, 56th / inch or less, 55th / inch or less, 54th / inch or less, 53th / inch or less, 52th / inch or less, 51th / inch or less, or 50th / inch or less. If it is less than the above range, it is difficult to ensure airtightness and mechanical strength regarding air expansion. Also, if it exceeds the above range, it is difficult to ensure the packageability or folding property of the airbag. Although not particularly limited, the density may be measured in accordance with ISO 7211-2 (section 3.07).

[0034] The protrusion pattern (P3) may be the same as or different from the patterns (P1, P2) of the fabric layers. If they are the same, the protrusion pattern (P3) may be more coarsely woven than the patterns (P1, P2) of the fabric layers.

[0035] In one example, the protruding pattern (P3) may have a mesh shape (see FIG. 2a, 2b or 3b). Here, the mesh shape means, for example, a shape in which two or more warp threads arranged in parallel in the warp direction cross two or more weft threads arranged in parallel in the weft direction. The mesh shape may be mixed with a net shape or a net shape. Such a mesh shape does not reduce the weaving efficiency of the double-layered fabric, and can improve the impact durability of the double-layered fabric, as confirmed in the following experimental examples.

[0036] In one example, the density of the warp and weft yarns forming the protruding pattern (P3) may be lower than the density of the warp and weft yarns forming the woven fabric layer patterns (P1, P2). For example, the density of the warp and weft yarns forming the protruding pattern (P3) may be 20 threads / inch (th / inch) or less, 15th / inch or less, 10th / inch or less, or 5th / inch or less. Specifically, the upper limit of the density of the warp and weft yarns forming the protruding pattern (P3) may be, for example, 4th / inch or less or 3th / inch or less. Within the above density range, it is possible to prevent deterioration of weaving performance due to tension variation and ensure the impact durability of the double woven fabric. The lower limit of the density of the warp and weft yarns forming the protruding pattern (P3) may be, for example, 1th / inch or more.

[0037] The type of fiber used to weave the patterns (P1, P2, P3) is not particularly limited. For example, one or more fibers selected from polyester fiber, nylon fiber, aramid fiber, polyketone fiber, carbon fiber, and cellulose fiber are used to form the patterns (P1, P2, P3).

[0038] In one embodiment, the fineness of the fiber may be within a range of 300 to 1500 dtex. When the fineness is within the range, appropriate mechanical strength and light weight can be ensured.

[0039] In one embodiment, the double-layered fabric further includes a resin coating layer for the fabric layer to reduce air leakage at the double-layered fabric expansion part. Specifically, the resin coating layer may be coated on one surface of the fabric layer (L1, L2). "Coating a coating layer on one surface of the fabric layer" means that a film (coating layer) made of a coating layer forming material is formed on the surface of the fabric layer (and / or the fiber forming the fabric layer).

[0040] The resin used for the coating may be, for example, a silicone resin or a urethane resin, but is not limited thereto.

[0041] The method for forming the coating layer is not particularly limited. For example, the coating formulation or coating composition can be coated on the surface of the fabric layer by knife coating, doctor blade, spray coating, dipping, etc.

[0042] In one example, the coating layer may be formed on both sides or one side of the fabric layers (L1, L2). For example, the coating layer may be coated on one side (i.e., the inner surface) of each of the fabric layers (L1) and (L2) that face each other. Alternatively, the coating layer may be formed on the surface facing the inner surface of the fabric layers (L1, L2), i.e., the outer surface of each of the fabric layers (L1, L2). In another example, the coating layer may be formed on both the outer surface and the inner surface of the fabric layers (L1, L2).

[0043] In one example, the protruding pattern (P3) is formed on the surface of the fabric layer opposite to the surface on which the resin coating layer is formed. Specifically, when the resin coating layer is coated on the outer surface of the fabric layer, the protruding pattern (P3) may be formed on the inner surface of one or more of the fabric layers (L1, L2).

[0044] In one embodiment, the coating amount of the resin coating layer is 30 to 150 g / m 2 Specifically, the lower limit of the coating amount is, for example, 35 g / m 2 More than 40g / m 2 More than 45g / m 2 or more than 50g / m 2 or more, the upper limit of which is, for example, 140 g / m 2 Below 130g / m 2 Below 120g / m 2 Below 110g / m 2 Below 100g / m 2 Below 90g / m 2 Below 80g / m 2 Below 70g / m 2 Below 60g / m 2 Less than or equal to 50g / m2 If the coating amount is less than the above range, the airbag has a high air permeability, making it difficult to maintain an inflated state at a certain pressure for 5 seconds or more after deployment. If the coating amount is more than the above range, the airbag becomes too thick and has poor storability, and the airbag comes into contact with a structure when deployed, making it difficult to perform its intended function. Although not particularly limited, the coating amount may be measured in accordance with ISO 3801.

[0045] In one embodiment, the weight (g / m2) of the double-layered fabric on which the resin-coated layer is formed is 2 ) is 450g / m 2 Specifically, the upper limit of the weight of the coated fabric is, for example, 400 g / m 2 or less than 350g / m 2 More specifically, it may be 340 g / m or less. 2 Below 330g / m 2 Below 320g / m 2 Below 310g / m 2 or less than 300g / m 2 The lower limit may be, for example, 280 g / m 2 More than 290g / m 2 More than 300g / m 2 or 310g / m 2 If the weight of the coated double-layered fabric exceeds the upper limit, it may be difficult to reduce the weight, and the fabric manufacturing cost may increase. If the weight of the coated double-layered fabric is below the lower limit, the mechanical properties may be deteriorated. Although not particularly limited, the weight of the coated fabric may be measured according to ISO 3801.

[0046] In one embodiment, the thickness of the double-layered fabric on which the resin-coated layer is formed may be in the range of 0.30 to 0.55 mm. Specifically, the lower limit of the thickness may be 0.31 mm or more, 0.32 mm or more, 0.33 mm or more, 0.34 mm or more, or 0.35 mm or more, and the upper limit may be, for example, 0.50 mm or less, 0.49 mm or less, 0.48 mm or less, 0.47 mm or less, 0.46 mm or less, or 0.45 mm or less. If the thickness is at the lower limit of the range, it is difficult to ensure sufficient mechanical properties, and if it exceeds the range, the folding property is poor. Although not particularly limited, the thickness may be measured according to ISO 2286-3.

[0047] The applications of the double-layered fabric are not particularly limited, and can be used, for example, in applications requiring gas inflatability, such as life jackets and airbags.

[0048] In another aspect, the present application relates to a method for producing a double-layered fabric of the above construction.

[0049] In one embodiment, the method for manufacturing the double woven fabric includes the step of simultaneously weaving a first fabric layer (L1) and a second fabric layer (L2) separated from each other using an one-piece weaving method (OPW, One Piece Woven) and forming a protruding pattern (P3) integrally formed with the fabric layer on the surface of one or more of the fabric layers (L1, L2). Here, the method may form the protruding pattern (P3) at intervals of at least 5 to 100 threads. The threads refer to the individual (or single) warp and weft threads forming the patterns (P1, P2) of the fabric layers (L1, L2).

[0050] The shape of the patterns (P1, P2, P3), the position of the protruding pattern (P3), the fibers (weft and warp) used in weaving, coatings, and other details regarding the double woven fabric and its manufacture are omitted since they are similar to those described above.

[0051] In one embodiment, the method can form one or more of the protruding patterns (P3) on the surface of the fabric layer at intervals (or to occupy an interval) of at least 5 to 100 threads, the specific thread intervals being as described above.

[0052] In one embodiment, the method may be used to repeatedly form the protruding patterns (P3) on the surface of the fabric layer at intervals of at least 5 to 50 threads, the specific thread intervals being the distance between the protruding patterns being as described above.

[0053] In one embodiment, the method can form the patterns (P1, P2) of the fabric layers (L1, L2) with warp and weft densities in the range of 40 to 80 th / inch. The specific densities are as described above.

[0054] In one embodiment, the method can form the protruding pattern (P3) with a warp and weft density of 20th / inch or less, 15th / inch or less, 10th / inch or less, or 5th / inch or less. The specific densities are as described above.

[0055] In one example, the method may further include applying and curing a resin coating composition (or coating formulation) on one surface of the fabric layers (L1, L2).

[0056] In one embodiment, the curing is performed at room temperature or higher. The room temperature is a temperature in a state where no cooling or heating is performed, and refers to a temperature of about 15 to 35° C. The temperature higher than room temperature is a temperature in a state where heating is performed, and may be a temperature exceeding 35° C., for example, a temperature in the range of 40 to 300° C. The curing time at the temperature is not particularly limited, and the curing may be performed within, for example, a few seconds (sec) to several tens of minutes (min).

[0057] In yet another embodiment of the present application, the present application relates to an article comprising the double-layered fabric. The type of such an article is not particularly limited, and may be, for example, a life jacket or an airbag. Effect of the Invention

[0058] According to the present application, a gas-inflatable double-layered fabric having excellent packability, improved impact resistance and tear strength, excellent weaving efficiency and manufacturing processability can be provided. In addition, the present application can provide an article (e.g., airbag, life jacket, etc.) including the gas-inflatable double-layered fabric. [Brief description of the drawings]

[0059] [Figure 1] 1 shows a schematic diagram of a double-layered fabric used for an airbag according to an example of the present application. As shown, the double-layered fabric may form a non-inflatable portion (A), an inflatable portion (B) and a joint portion (C). [Figure 2a] 2A is an image (1) of the surfaces of the fabric layers (L1, L2) and the protruding pattern (P3) according to an example of the present application. Specifically, FIG. 2A is an image of a first fabric layer (L1) 10 and a second fabric layer (L2) 20 facing each other (the non-coated surface serving as the inner surface) on which a plurality of protruding patterns (P3) are formed on the inner surface of the first fabric layer 10. [Figure 2b] 2A and 2B are photographs (2) of the surface of the fabric layers (L1, L2) and the protruding pattern (P3) according to an example of the present application. Specifically, FIG. 2B is a magnified photograph of the protruding pattern (P3), showing each protruding pattern 30 formed with a predetermined thread spacing (e.g., 5 to 100 thread spacing) and occupying a certain area. [Figure 2c] 2c is an image of the surface of the fabric layer (L1, L2) and the protruding pattern (P3) according to an embodiment of the present application. Specifically, FIG. 2c is an image of the coating surface, which is the surface opposite to the inner surface of the fabric layer on which the protruding pattern (P3) is formed. [Figure 3a]3a is an image (1) for explaining a mesh-shaped protruding pattern formed on the surface of a fabric layer. Specifically, FIG. 3a is an image of a pattern (P1 or P2) on a fabric layer (L1 or L2). [Figure 3b] Fig. 3b is an image (2) for explaining a mesh-shaped protruding pattern formed on the surface of a fabric layer. Specifically, Fig. 3b is an image showing a mesh-shaped protruding pattern (P3) formed on the fabric layer pattern (P1 or P2) of Fig. 3a. Here, in the specific example of Fig. 3b, the density of the fabric layer pattern is 57x48th / inch, the density of the protruding pattern is 8x10th / inch, one protruding pattern occupies an interval of 36 threads in the weft and warp directions, and each protruding pattern is formed to be spaced apart by an interval of 8 threads in the weft and warp directions. [Figure 4] FIG. 2 is a diagram for explaining a puncture test, which will be described later. [Figure 5a] FIG. 1 is a diagram for explaining a tear strength test described later. [Figure 5b] FIG. 2 is a diagram for explaining a tear strength test described later. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0060] The functions and effects of the present invention will be described in more detail below with reference to specific examples of the present invention, however, these are presented as examples of the present invention and do not in any way limit the scope of the invention.

[0061] <Examples and Comparative Examples> <Example> A double-layered fabric was manufactured by OPW weaving method using a Jacquard mechanism. The fiber used in manufacturing the double-layered fabric was Kolon's PET fiber (Secura-Stelen®), and the first fabric layer pattern (P1) and the second fabric layer pattern (P2) were woven in a 1x1 plain weave. In this case, a protruding pattern as shown in Figure 3b was formed on the inner surface of the first fabric layer (i.e., the inner side of the first fabric layer facing the side of the second fabric layer).

[0062] The outer surface of each fabric layer was then coated with urethane resin (Covestro's DLU coating agent was used) (coating amount 38 g / m 2 ), and cured in a hot air chamber at temperatures of 80 to 180°C for approximately 1.5 minutes.

[0063] The thickness of the produced coated double-layered fabric is 0.43 mm, and the total weight is 302 g / m 2 It is.

[0064] <Comparative Example 1> An identical coated fabric was prepared, except that the protruding pattern (P3) was not formed on the inner surface of the double layer fabric.

[0065] The thickness of the produced coated double-layered fabric is 0.37 mm, and the total weight is 297 g / m 2 It is.

[0066] <Comparative Example 2> The protruding pattern (P3) was not formed on the inner surface of the double-layered fabric, and the outer surface of each fabric layer was coated with silicone resin (DC3760 coating agent from Dow Corning was used) (coating amount: about 75 g / m 2 ) Except for the above, coated fabrics were prepared in the same manner.

[0067] The thickness of the produced coated double-layered fabric is 0.36 mm, and the total weight is 340 g / m 2 It is.

[0068] <Experiment 1: Evaluation of mechanical properties> 1.Puncture test (Puncture force, N) The physical properties of the woven fabrics were evaluated according to ASTM F1342. Specifically, the woven fabrics manufactured in the examples and comparative examples were fixed to a puncture strength measurement jig according to ASTM F1342, and then Probe A was inserted into the puncture guide hole of the jig at a speed of 50.8 cm / min. Then, the load and degree of elongation when a puncture was generated in the fabric were measured. The ASTM F1342 puncture strength measurement jig and Probe A were manufactured according to the standard shown in Figure 4.

[0069] 2. Tear strength test (Tear force, N) The physical properties of the woven fabrics were evaluated according to ISO 13937-2. Specifically, the woven fabrics produced in the examples and comparative examples were cut into trouser-shaped test pieces (unit: cm) as shown in Figure 5a, and both legs of the sample were pulled vertically at a speed of 100 mm / min. At this time, a graph of tear strength against time, as shown in Figure 5b, was obtained. After dividing the peaks in this graph into four equal parts from the start to the end, the tear strength was calculated by calculating the arithmetic mean of a total of 16 values, including the two maximum peaks and the two minimum peaks for each equal part.

[0070] The experimental results are shown in Table 1 below.

[0071] [Table 1]

[0072] <Experiment 2: Evaluation of thickness, weight and foldability> Since the thickness during fabric folding may vary depending on the size and shape of the fabric, Example 2 and Comparative Example 3 were prepared using fabrics of the same shape and specifications. Specifically, for the test pieces of Example 2 and Comparative Example 3, the same amount (about 35 gsm) of polyurethane coating agent was applied to the same fabric (PET 550 dtex / 144f was used to prepare an OPW fabric with a weft and warp density of 57 x 48 th / in). In this case, the fabric was in the shape of a square sheet and had an area of ​​A.

[0073] However, in Example 2, a protruding pattern (8×10th / in (weft×warp) density) of 36 threads in the weft and warp directions was formed on the fabric, and the protruding pattern was repeatedly positioned at intervals of 20 threads in the weft and warp directions to be uniformly formed in a portion (a) of the fabric area (A) (1 layer). And, in Comparative Example 3, a reinforcing fabric (manufactured the same as the fabric, only the area was different) covering the area a was patched onto the fabric (2 layers).

[0074] The thickness, weight and foldability of Example 2 and Comparative Example 3 were evaluated (arithmetic mean values ​​for five measurements) and the results are as follows.

[0075] [Table 2]

Claims

1. The fabric includes a first fabric layer (L1) having a predetermined pattern (P1); a second fabric layer (L2) having a predetermined pattern (P2); and a joint where the first fabric layer and the second fabric layer are joined, At least one surface of the fabric layers (L1, L2) is provided with a protruding pattern (P3) formed integrally with the fabric layer, The protruding pattern (P3) is formed to occupy an interval of 5 to 100 threads. A double weave, where the threads refer to the individual warp and weft threads that form the pattern (P1, P2) of the weave layers (L1, L2).

2. The double layer fabric according to claim 1, wherein the protruding patterns (P3) are spaced apart at intervals of 5 to 50 threads.

3. The double fabric according to claim 1, wherein the pattern (P1) of the fabric layer (L1) and the pattern (P2) of the fabric layer (L2) are identical or different from each other.

4. The double woven fabric according to claim 1, wherein the pattern (P1) of the fabric layer (L1) and the pattern (P2) of the fabric layer (L2) are each independently a 1x1 weave, a 2x2 weave, a 3x3 weave, a satin weave, a warp rib weave, a weft rib weave, or a mixture thereof.

5. 2. The double layer fabric according to claim 1, wherein the density of the warp and weft threads forming the patterns (P1, P2) of the fabric layers (L1, L2) is 40 to 80 th / inch.

6. The double-weave fabric of claim 1 , wherein the protruding pattern has a mesh shape.

7. 2. The double-layered fabric according to claim 1, wherein the density of the warp and weft threads forming said projection pattern (P3) is 20 threads / inch or less.

8. 2. The double-layered fabric according to claim 1, wherein the patterns (P1, P2, P3) are formed of one or more fibers selected from polyester fibers, nylon fibers, aramid fibers, polyketone fibers, carbon fibers and cellulose fibers.

9. The double layer fabric according to claim 8, wherein the fibre fineness is between 300 and 1500 dtex.

10. The fabric further includes a resin coating layer formed on one surface of the fabric layer (L1, L2), The double-layer fabric of claim 1 , wherein the resin coat layer comprises one or more of a silicone resin and a urethane resin.

11. The double layered fabric according to claim 10, wherein the protruding pattern (P3) is formed on a surface of the fabric layer opposite to a surface on which the resin coating layer is formed.

12. The coating amount of the resin coating layer is 30 to 150 g / m ２ 11. The double weave fabric of claim 10, wherein the thickness is in the range of

13. forming a protruding pattern (P3) integrally formed with the fabric layer on at least one surface of the fabric layers (L1, L2) while simultaneously weaving the first fabric layer (L1) and the second fabric layer (L2) separated from each other using an one piece weaving method (OPW); Including, The first fabric layer and the second fabric layer are joined at a bonding point, A method for manufacturing a double woven fabric, in which the protruding pattern (P3) is formed to a size that occupies an interval of 5 to 100 threads (wherein the threads refer to the individual warp and weft threads that form the patterns (P1, P2) of the woven fabric layers (L1, L2)).

14. The method for manufacturing a double-layered fabric according to claim 13, wherein the protruding pattern (P3) is formed in a mesh shape.

15. An article comprising the double layer fabric according to claim 1.

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