Double-layer fabric and article comprising the same

Abstract

This application relates to a double-layer fabric and articles comprising the double-layer fabric.

Description

Technical Field

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2020-0186478 filed on December 29, 2020 and Korean Patent Application No. 10-2021-0184478 filed on December 22, 2021, the disclosures of which are incorporated herein by reference in their entirety.

[0003] This application relates to a double-layered fabric and an article comprising said double-layered fabric. More specifically, this disclosure relates to an inflatable double-layered fabric with a prominent pattern, and an article comprising said double-layered fabric (e.g., an airbag, a life jacket, etc.). Background Technology

[0004] An airbag is a device that protects vehicle occupants by detonating propellant after a sensor detects the impact when an external force, such as a collision, is applied to a vehicle. This causes the gas supplied to the airbag cushion to expand.

[0005] In the event of airbag deployment, the airbag may be damaged by broken glass windows or car interior trim. In particular, when a vehicle rolls over, the side curtain airbags located near the windows are most severely damaged, and airbags damaged in this way by glass shards or other debris cannot function properly.

[0006] In conventional techniques, airbags are reinforced by stitching or bonding a fabric backing to enhance their impact resistance. However, this method degrades the airbag's packaging or folding performance and incurs additional costs. Summary of the Invention

[0007] Technical issues

[0008] One object of this application is to provide an inflatable (e.g., air) double-layer fabric.

[0009] Another objective of this application is to provide an inflatable double-layer fabric with improved impact durability and tear strength.

[0010] Another object of this application is to provide an article comprising the double-layered fabric (e.g., an airbag, a life jacket, etc.).

[0011] Another object of this application is to provide an airbag with excellent packaging or folding performance.

[0012] Another object of this application is to provide an airbag with excellent weaving efficiency or processing performance, such as eliminating the need for reinforcing fabric bonding (addition, backing, or filling) or adhesion between fabrics.

[0013] The above and other objectives of this application can be fully achieved by the application described below.

[0014] Technical solution

[0015] In one embodiment, this disclosure relates to a double-layer fabric. The double-layer fabric includes a first fabric layer (L1) and a second fabric layer (L2).

[0016] The first fabric layer (L1) has a predetermined pattern (P1), and the second fabric layer (L2) has a predetermined pattern (P2). The pattern may refer to a fabric weave pattern or a visually recognizable fabric weave pattern.

[0017] The double-layered fabric can be used in airbags and is inflatable. For example, the double-layered fabric can be inflatable by combining two fabric layers (L1, L2). Specifically, see... Figure 1 The double-layer fabric can be divided into a non-inflatable portion (A) and an inflatable portion (B), with the junction (C) where the first and second fabric layers meet serving as the boundary. That is, the double-layer fabric can include a non-inflatable portion (A), an inflatable portion (B), and a junction (C), or it can be formed as a single unit. The inflatable portion formed as described above can have sealing properties to achieve a degree of inflatability. For example, the junction can be configured to prevent gas that causes expansion from escaping between the two separate fabric layers and also to withstand the pressure of the expanding gas. Therefore, when gas flows in, the inflatable portion can inflate, thereby protecting the user from external impacts.

[0018] There are no particular restrictions on the bonding method between the first and second fabric layers.

[0019] In one embodiment, the second fabric layer and the first fabric layer are manufactured using a one-piece weaving process, wherein two separate fabrics (layers) can be woven simultaneously, and these fabric layers can be joined at a joint point (or joint). In this case, the joint point (or joint) corresponds to the joint (C).

[0020] In another embodiment, the second fabric layer and the first fabric layer can be manufactured independently, and then a portion of the fabric layers can be joined by sewing, fusing, or bonding. The bonding area or point between the fabric layers corresponds to the joint (C).

[0021] Considering the simplification of the process and the reduction of manufacturing costs, the double-layer fabric is preferably manufactured using a one-piece weaving process.

[0022] The double-layer fabric of this application has a raised pattern (P3). Specifically, the raised pattern (P3) is integrally formed with the fabric layers on one or more surfaces of the fabric layers (L1, L2). In this respect, "the raised pattern is integrally formed with the fabric layers" means that the raised pattern (P3) is formed using warp or weft yarns used for weaving the fabric layers (L1, L2) or their patterns (P1, P2), and then the same yarns are used again to weave the patterns (P1, P2) of the fabric layers. This weaving can be performed, for example, using a jacquard loom, specifically, the weaving can be performed using an OPW weaving process on a jacquard loom. Therefore, according to this application, additional steps such as backing (or filling) reinforcing fabrics or bonding additional patterns after the fabric layers are manufactured are not required.

[0023] There are no particular restrictions on the location of the raised pattern (P3) on the surface of the fabric layers (L1, L2), but for example, the raised pattern (P3) can be locally formed on specific portions (areas) of the fabric that are expected to experience a strong impact when the airbag is inflated. Therefore, as confirmed in the test examples below, the raised pattern (P3) compensates for the pressure resistance of local portions (areas) of the fabric layers (L1, L2) that may be breakpoints when the airbag deploys, and prevents the fabric layers from tearing.

[0024] In one embodiment, a protruding pattern (P3) may be formed on a surface on which the fabric layers (L1, L2) are opposite to each other. (See reference...) Figure 1 The raised pattern (P3) can be formed on one surface (i.e., the inner surface) of the fabric layers (L1, L2) forming the interior of the inflatable portion (B), through which gas flows in and inflates. In another embodiment, the raised pattern (P3) can be formed on the surface opposite to the inner surface of each fabric layer (L1, L2), i.e., on the outer surface. In yet another embodiment, the raised pattern (P3) can be formed on both the inner and outer surfaces of the fabric layers (L1, L2).

[0025] Typically, as described below, a resin coating can be formed on one surface of the fabric layer; however, from the perspective of preventing coating imbalance, the raised pattern (P3) is preferably formed on the surface opposite to the surface on which the resin coating is formed. For example, when a resin coating is formed on the outer surface of a double-layer fabric, the raised pattern (P3) is preferably formed on the inner surface of the double-layer fabric.

[0026] In one specific embodiment of this application, one or more embossed patterns (P3) may be formed on any one or more surfaces of the fabric layers (L1, L2). Alternatively, two or more embossed patterns (P3) may be formed on any one or more surfaces of the fabric layers (L1, L2).

[0027] When multiple raised patterns are formed on a fabric layer, each raised pattern can be visually distinguished. For example, the shape of each raised pattern, the area they occupy, and / or the spacing between them can be visually identified, making each raised pattern distinguishable (see [link to product description]). Figure 2a ).

[0028] As described above, multiple protruding patterns can be repeatedly formed on the fabric layer while having the same or different shapes.

[0029] In one implementation, the embossed pattern (P3) can be formed with a spacing dimension having at least 5 to 100 lines (or occupying that spacing). Here, the line refers to one (or strand) of the warp and weft of the pattern (P1, P2) forming the fabric layers (L1, L2). For example, when the embossed pattern is formed with the aforementioned line spacing dimension, the area occupied by the embossed pattern can be a polygon (e.g., a quadrilateral) consisting of at least five lines in each of the warp and weft directions, or an area equivalent to that (see [link to relevant documentation]). Figure 2b It is composed of ).

[0030] Specifically, the protruding pattern (P3) can be formed, for example, with an interval size (or the size occupying that interval) of 10 or more, 15 or more, 20 or more, 25 or more, 30 or more, 35 or more, 40 or more, or 45 or more threads. Furthermore, the upper limit of the interval size (or the size occupied by the protruding pattern, represented by lines) can be, for example, less than 95 threads, less than 90 threads, less than 85 threads, less than 80 threads, less than 75 threads, less than 70 threads, less than 65 threads, less than 60 threads, less than 55 threads, less than 50 threads, less than 45 threads, less than 40 threads, less than 35 threads, less than 30 threads, or less than 25 threads. When the size of the protruding pattern is adjusted within the above-mentioned thread interval range, deterioration of weaving performance due to tension imbalance can be prevented, and the impact durability of the double-layer fabric can be ensured.

[0031] The spacing between the warp and weft lines that form the prominent pattern can be adjusted independently of each other within the range described above.

[0032] In one embodiment, the raised patterns P3 can be formed individually at predetermined intervals. Specifically, multiple raised patterns (P3) formed on one or more surfaces of the fabric layers (L1, L2) can be formed at intervals of at least 5 to 50 lines. For example, the interval between the raised patterns (P3) can be 10 or more lines, 15 or more lines, 20 or more lines, 25 or more lines, or 30 or more lines, and its upper limit can be, for example, less than 45 lines, less than 40 lines, less than 35 lines, less than 30 lines, less than 25 lines, less than 20 lines, less than 15 lines, or less than 10 lines.

[0033] In another embodiment, the raised pattern (P3) may be repeated at regular intervals. Specifically, multiple raised 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 lines.

[0034] In one embodiment, the patterns (P1, P2) of the fabric layers on which the protruding pattern (P3) is formed may be the same as or different from each other.

[0035] There are no particular restrictions on the specific shape (or type) of the fabric layer pattern (P1, P2). For example, the fabric layers (L1, L2) can have their own independent patterns (P1, P2), which are 1×1 weave, 2×2 weave, 3×3 weave, satin weave, warp plain weave, weft plain weave, or a mixture thereof.

[0036] In one embodiment, the density of warp and weft threads in the pattern (P1, P2) forming the fabric layers (L1, L2) can range from 40 threads / inch to 80 threads / inch. Specifically, the density of warp and weft threads forming the pattern (P1, P2) can be, for example, more than 46 threads / inch, more than 47 threads / inch, more than 48 threads / inch, more than 49 threads / inch, more than 50 threads / inch, more than 51 threads / inch, more than 52 threads / inch, more than 53 threads / inch, more than 54 threads / inch, or more than 55 threads / inch. Furthermore, the upper limit can be, for example, less than 70 threads / inch, less than 65 threads / inch, or less than 60 threads / inch, specifically less than 59 threads / inch, less than 58 threads / inch, less than 57 threads / inch, less than 56 threads / inch, less than 55 threads / inch, less than 54 threads / inch, less than 53 threads / inch, less than 52 threads / inch, less than 51 threads / inch, or less than 50 threads / inch. When the density is below the above range, it becomes difficult to ensure airtightness and mechanical strength related to inflation. Furthermore, when the density exceeds the above range, it becomes difficult to ensure the packaging characteristics or foldability of the airbag. Density can be measured according to ISO 7211-2 (Section 3.07), but is not specifically limited to this.

[0037] The embossed pattern (P3) may be the same as or different from the patterns (P1, P2) of the fabric layers. When the patterns are the same, the embossed pattern (P3) may be woven more loosely than the patterns (P1, P2) of the fabric layers.

[0038] In one implementation, the highlighted pattern (P3) may have a grid shape (see...). Figure 2a , Figure 2b or Figure 3b In this context, the mesh shape can refer to, for example, the shape where two or more warp threads arranged side-by-side in the warp direction intersect with two or more weft threads arranged side-by-side in the weft direction. The mesh shape can be used interchangeably with the mesh shape. As confirmed in the following experimental examples, this mesh shape can improve the impact durability of double-layer fabrics, etc., without reducing the weaving efficiency of the double-layer fabric.

[0039] In one embodiment, the density of the warp and weft yarns forming the protruding pattern (P3) can be less than the density of the warp and weft yarns forming the fabric layer patterns (P1, P2). For example, the density of the warp and weft yarns forming the protruding pattern (P3) can be less than 20 yarns / inch, less than 15 yarns / inch, less than 10 yarns / inch, or less than 5 yarns / inch. Specifically, the upper limit of the density of the warp and weft yarns forming the protruding pattern (P3) can be, for example, less than 4 yarns / inch or less than 3 yarns / inch. Within the above density range, the deterioration of weaving performance due to tension imbalance can be prevented, and the impact durability of the double-layer fabric can be ensured. The lower limit of the density of the warp and weft yarns forming the protruding pattern (P3) can be, for example, more than 1 yarn / inch.

[0040] There are no particular restrictions on the type of fiber used to weave patterns P1, P2, and P3. For example, at least one fiber selected from polyester, nylon, aromatic polyamide, polyketone, carbon fiber, and cellulose fiber can be used to form patterns P1, P2, and P3.

[0041] In one embodiment, the fiber fineness can be in the range of 300 dtex to 1500 dtex. When the fineness range is met, lightweight properties and appropriate mechanical strength can be ensured.

[0042] In one embodiment, the double-layer fabric further includes a resin coating for the fabric layers to reduce air leakage in the inflatable portion of the double-layer fabric. Specifically, the resin coating may be applied to one surface of the fabric layers (L1, L2). "Applying a coating to one surface of the fabric layer" means forming a film (coating) of coating-forming material on the surface of the fabric layer (and / or the fibers forming the fabric layer).

[0043] The resin used for coating can be, for example, silicone resin or polyurethane resin. However, the coating resin is not limited to these.

[0044] There are no particular limitations on the method of forming the coating. For example, coating agents or coating compositions can be applied to the surface of the fabric layer using coating methods such as blade coating, sheet coating, spraying, or dip coating.

[0045] In one embodiment, the coating may be formed on both sides or one side of the fabric layers (L1, L2). For example, the coating may be applied to one surface (i.e., the inner surface) of the fabric layers L1 and L2 that are opposite to each other. Alternatively, the coating may be formed on the surface opposite to the inner surface of the fabric layers (L1, L2), i.e., on the outer surface of each fabric layer (L1, L2). In another embodiment, the coating may be formed on both the outer and inner surfaces of the fabric layers (L1, L2).

[0046] In one embodiment, the raised pattern (P3) may be formed on a surface opposite to the surface of the fabric layer on which the resin coating is formed. Specifically, when the resin coating is applied to the outer surface of the fabric layer, the raised pattern (P3) may be formed on the inner surface of at least one of the fabric layers (L1, L2).

[0047] In one embodiment, the coating amount of the resin coating may be 30 g / m². 2 Up to 150g / m 2 Specifically, the lower limit of the coating amount can be, for example, 35 g / m². 2 Above, 40g / m 2 Above, 45g / m 2 Above or 50g / m 2 The upper limit can be, for example, 140g / m³. 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 Below or 50g / m 2The following applies. When the coating amount is less than the range mentioned above, the airbag's ventilation volume is large, making it difficult to maintain inflation for more than 5 seconds at constant pressure after deployment. Furthermore, when the coating amount exceeds the range mentioned above, the airbag becomes too thick, resulting in poor storability, and making it difficult for the airbag to perform its original function while in contact with the structure upon deployment. The coating amount can be measured according to ISO 3801, but is not specifically limited to it.

[0048] In one embodiment, the weight (g / m²) of the double-layer fabric on which the resin coating is formed is... 2 It can be 450g / m 2 Specifically, the upper limit for the weight of the coated fabric can be, for example, 400 g / m². 2 Below or 350g / m 2 More specifically, 340g / m 2 Below, 330g / m 2 Below, 320g / m 2 Below, 310g / m 2 Below or 300g / m 2 Below. Furthermore, its lower limit could be, for example, 280 g / m³. 2 Above, 290g / m 2 Above, 300g / m 2 Above or 310g / m 2 The above applies. When the weight of the coated double-layer fabric exceeds the upper limit mentioned above, it becomes difficult to reduce the weight and increases the manufacturing cost of the fabric. Furthermore, when the weight of the coated double-layer fabric is below the lower limit mentioned above, the mechanical properties deteriorate. The weight of the coated fabric can be measured according to ISO 3801, but is not specifically limited to this.

[0049] In one embodiment, the thickness of the double-layer fabric on which the resin coating is formed can be in the range of 0.30 mm to 0.55 mm. Specifically, the lower limit of the thickness can 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 can be, for example, less than 0.50 mm, less than 0.49 mm, less than 0.48 mm, less than 0.47 mm, less than 0.46 mm, or less than 0.45 mm. When the thickness is at the lower limit of the above range, it is difficult to ensure sufficient mechanical properties, and when the thickness exceeds the above range, the foldability is poor. The thickness can be measured according to ISO 2286-3, but is not particularly limited thereto.

[0050] There are no particular restrictions on the use of double-layered fabrics. For example, it can be used in applications that require inflation, such as life jackets or airbags.

[0051] In another embodiment of this application, a method for producing a double-layer fabric having the above-described structure is provided.

[0052] In one embodiment, a method for producing a double-layer fabric includes: simultaneously weaving a first fabric layer (L1) and a second fabric layer (L2) that are separate from each other using an open-piece weaving (OPW) process; and forming a raised pattern (P3) integrally formed with the fabric layer on the surface of at least one of the fabric layers (L1, L2). In this case, the method can form raised patterns (P3) with a spacing of 5 to 100 threads. The thread refers to a warp and weft thread (or a strand) that forms the pattern (P1, P2) of the fabric layers (L1, L2).

[0053] The detailed descriptions of the shapes of patterns P1, P2 and P3, the location of the prominent pattern (P3), the fibers used for weaving (weft and warp), the coating and other double-layer fabrics and their production are the same as those described above, and therefore will be omitted.

[0054] In one embodiment, the method may form one or two or more protruding patterns P3 on the surface of the fabric layer at intervals of at least 5 to 100 lines (or at the size of the interval). The specific line intervals are the same as described above.

[0055] In one embodiment, the method can repeatedly form a raised pattern (P3) on the surface of the fabric layer at intervals of at least 5 to 50 lines. The specific line interval, i.e., the interval between the raised patterns, is the same as described above.

[0056] In one embodiment, the method can form a pattern (P1, P2) of fabric layers (L1, L2) with a warp and weft density ranging from 40 threads / inch to 80 threads / inch. The specific density is as described above.

[0057] In one embodiment, the method can form a prominent pattern (P3) with a warp and weft density of less than 20 threads / inch, less than 15 threads / inch, less than 10 threads / inch, or less than 5 threads / inch. The specific density is as described above.

[0058] In one embodiment, the method may further include applying a resin coating composition (or coating formulation) to one surface of a fabric layer (L1, L2) and curing it.

[0059] In one embodiment, curing can be carried out at room temperature or higher. Room temperature is the temperature under conditions where no special heating or cooling is performed, and refers to a temperature of about 15°C to 35°C. Furthermore, a temperature greater than or equal to room temperature is the temperature at which heating is performed, and can refer to a temperature exceeding 35°C, for example, a temperature in the range of 40°C to 300°C. There is no particular limitation on the curing time at said temperature, and curing can be carried out, for example, in seconds (sec) to tens of minutes (min).

[0060] In another embodiment of this application, an article comprising the double-layered fabric is provided. There are no particular limitations on the type of article, but it could be, for example, a life jacket or an airbag.

[0061] Beneficial effects

[0062] According to this application, an inflatable double-layer fabric can be provided, which has excellent storability while also possessing improved impact durability and tear strength, and further, excellent weaving efficiency and manufacturing performance. Additionally, this application can provide an article comprising the inflatable double-layer fabric described above (e.g., airbags, life vests, etc.). Attached Figure Description

[0063] Figure 1 A double-layer fabric that can be used in an airbag according to one embodiment of this application is schematically depicted. As shown, the double-layer fabric can form a non-inflatable portion (A), an inflatable portion (B), and a joint portion (C).

[0064] Figure 2 is a photograph of the surface of the fabric layers (L1, L2) and the raised pattern (P3) according to one embodiment of this application. Specifically, Figure 2a This is an image showing a state in which multiple raised patterns (P3) are formed on the inner surface of the first fabric layer 10, in the opposing surfaces (the uncoated surfaces of the inner surfaces) of the first fabric layer (L1) 10 and the second fabric layer (L2) 20. Furthermore, Figure 2b This is an enlarged photograph of the salient pattern (P3), showing a salient pattern 30 formed by occupying a predetermined area with a predetermined line spacing size (e.g., a line spacing size of 5 to 100 lines). On the other hand, Figure 2c It is an image of the coated surface, which is the surface opposite to the inner surface of the fabric layer on which the protruding pattern (P3) is formed.

[0065] Figure 3 is an image illustrating a grid-like raised pattern formed on the surface of a fabric layer. Specifically, Figure 3a It is an image obtained by photographing the pattern (P1 or P2) of the fabric layer (L1 or L2). Figure 3b Formed through photography Figure 3aThe image is obtained by showing the grid-like raised pattern (P3) on the fabric layer pattern (P1 or P2). At this time, in Figure 3b In the implementation scheme, the density of the fabric layer pattern is 57 threads / inch × 48 threads / inch, and the density of the protruding pattern is 8 threads / inch × 10 threads / inch. The size of a protruding pattern is 36 thread intervals in both the weft and warp directions, and each protruding pattern can be formed individually with 8 thread intervals in both the weft and warp directions.

[0066] Figure 4 This is a diagram used to illustrate the puncture test described later.

[0067] Figure 5 is a diagram used to illustrate the tear strength test described later. Detailed Implementation

[0068] In the following description, the effects and functions of the invention will be described in more detail with reference to specific embodiments thereof. However, these embodiments are presented for illustrative purposes only, and the scope of the invention is not limited in any way thereby.

[0069] Examples and Comparative Examples

[0070] Example 1

[0071] Double-layer fabric is manufactured using an OPW weaving process on a jacquard loom. The fiber used to manufacture the double-layer fabric is Kolon PET fiber. Furthermore, the patterns of the first fabric layer (P1) and the second fabric layer (P2) are each woven into a 1×1 plain weave. At this time, a pattern is formed on the inner surface of the first fabric layer (i.e., the inner surface of the first fabric layer facing one surface of the second fabric layer) as shown in the image. Figure 3b The highlighted pattern shown.

[0072] Then, use polyurethane resin (using Covestro DLU coating agent) (coating amount is 38g / m²). 2 Apply the coating to the outer surface of each fabric layer, and then cure it in a hot air chamber at a temperature of 8°C to 180°C for about 1.5 minutes.

[0073] The coated double-layer fabric manufactured as described above has a thickness of 0.43 mm and a total weight of 302 g / m². 2 .

[0074] Comparative Example 1

[0075] The coated fabric is manufactured in the same manner, except that the raised pattern P3 is not formed on the inner surface of the double-layered fabric.

[0076] The coated double-layer fabric manufactured as described above has a thickness of 0.37 mm and a total weight of 297 g / m². 2 .

[0077] Comparative Example 2

[0078] Except for the absence of a raised pattern (P3) on the inner surface of the double-layer fabric, and the use of silicone resin (using Dow Corning DC3760 coating agent) (coating amount approximately 75 g / m²) 2 The coated fabric is manufactured in the same manner, except that the outer surfaces of each fabric layer are coated.

[0079] The thickness of the coated double-layer fabric manufactured as described above is 0.36 mm, and the total weight is 340 g / m². 2 .

[0080] Experiment 1: Evaluation of mechanical properties

[0081] 1. Puncture test (puncture force, N)

[0082] The physical properties of the fabrics were evaluated according to ASTM F1342. Specifically, fabrics manufactured in the examples and comparative examples were fixed to an ASTM F1342 puncture strength measuring fixture, and probe A was then penetrated into the puncture guide hole of the fixture at a rate of 50.8 cm / min. The load and elongation at the time of puncture in the fabric were then measured. Figure 4 The standard manufacturing ASTM F1342 puncture strength measuring fixture and probe A are shown.

[0083] 2. Tear strength test (tear force, N)

[0084] The fabric properties were evaluated according to ISO 13937-2. Specifically, the fabrics manufactured in the examples and comparative examples were cut into pieces as shown in the figures. Figure 5a The trouser-shaped sample shown (unit: cm) is stretched taut along its two legs at a speed of 100 mm / min in the vertical direction. At this time, as... Figure 5b As shown, a tear strength graph based on time can be obtained. The peaks of this graph are divided into four equal parts from beginning to end. The arithmetic mean of 16 values, including the two largest peaks and two smallest peaks, is then calculated for each part to determine the tear strength. The experimental results are shown in Table 1 below.

[0085] [Table 1]

[0086]

[0087] Experiment 2: Evaluating thickness, weight, and foldability

[0088] When folding the fabric, the thickness can vary depending on the size and shape of the fabric. Therefore, fabrics with the same shape and specifications were used to construct Examples 2 and Comparative Example 3. Specifically, for the samples of Examples 2 and Comparative Example 3, the same polyurethane coating material was applied to the same fabric (OPW fabric manufactured using PET 550 dtex / 144f, with a weft and warp density of 57 threads / inch × 48 threads / inch) in the same amount (approximately 35 gsm). At this time, the fabric had a rectangular sheet shape with an area of ​​A.

[0089] However, in Example 2, a raised pattern occupied by 36 threads in the weft and warp directions (8 threads / inch × 10 threads / inch (weft × warp) density) is formed on the fabric, and the raised pattern described above is repeated at intervals of 20 threads in the weft and warp directions, so that it is uniformly formed on a portion (a) of the fabric region (A) (1 layer). Furthermore, in Comparative Example 3, a reinforcing fabric occupying region (a) (manufactured in the same manner as the manufactured fabric, only with a different area) is backed onto the manufactured fabric (2 layers).

[0090] The thickness, weight, and foldability of Example 2 and Comparative Example 3 were evaluated as follows (arithmetic mean of 5 measurements).

[0091] [Table 2]

[0092]

Claims

1. A double-layer fabric, comprising: A first fabric layer L1 having a predetermined pattern P1; A second fabric layer L2 having a predetermined pattern P2; and the joint where the first fabric layer L1 and the second fabric layer L2 are joined. A raised pattern P3, integrally formed with the fabric layer, is formed on the surface of at least one of the fabric layers L1 and L2. The protruding pattern P3 is formed with a spacing of 5 to 100 lines. The prominent pattern P3 is formed individually with intervals of 5 to 50 lines. The thread refers to a warp and weft thread that forms the patterns P1 and P2 of the fabric layers L1 and L2, and The protruding pattern has a grid shape.

2. The double-layer fabric according to claim 1, wherein: The pattern P1 of the fabric layer L1 and the pattern P2 of the fabric layer L2 may be the same as or different from each other.

3. The double-layer fabric according to claim 1, wherein: The pattern P1 of fabric layer L1 and the pattern P2 of fabric layer L2 are each independently a 1×1 weave, a 2×2 weave, a 3×3 weave, a satin weave, a warp-faced plain weave, a weft-faced plain weave, or a mixture thereof.

4. The double-layer fabric according to claim 1, wherein: The density of warp and weft threads forming the patterns P1 and P2 of the fabric layers L1 and L2 is 40 threads / inch to 80 threads / inch.

5. The double-layer fabric according to claim 1, wherein: The density of the warp and weft threads forming the prominent pattern P3 is less than 20 threads per inch.

6. The double-layer fabric according to claim 1, wherein: The patterns P1, P2 and P3 are formed from at least one fiber selected from polyester fiber, nylon fiber, aromatic polyamide fiber, polyketone fiber, carbon fiber and cellulose fiber.

7. The double-layer fabric according to claim 6, wherein: The fineness of the fibers is 300 dtex to 1500 dtex.

8. The double-layer fabric according to claim 1, The double-layer fabric also includes a resin coating formed on one surface of the fabric layers L1 and L2. in, The resin coating includes at least one of silicone resin and polyurethane resin.

9. The double-layer fabric according to claim 8, wherein: The protruding pattern P3 is formed on another surface opposite to one surface on which the resin coating is formed.

10. The double-layer fabric according to claim 8, wherein: The resin coating has a coating weight of 30 g / m³. 2 Up to 150g / m 2 Within the range.

11. A method for producing a double-layer fabric, comprising: A first fabric layer L1 and a second fabric layer L2, which are separate from each other, are woven simultaneously using an open-weave (OPW) process. The first fabric layer L1 and the second fabric layer L2 are joined at a joint, and a raised pattern P3 integrally formed with the fabric layer is formed on the surface of at least one of the fabric layers L1 and L2. The protruding pattern P3 is formed with a spacing of 5 to 100 lines. The prominent pattern P3 is formed individually with intervals of 5 to 50 lines. The thread refers to a warp and weft thread that forms the patterns P1 and P2 of the fabric layers L1 and L2, and The protruding pattern P3 is formed in a grid shape.

12. An article comprising the double-layered fabric according to claim 1.

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