Thin and lightweight fabric made of double weave

Abstract

To provide a downproof fabric that is thin and lightweight, yet offers excellent abrasion resistance and tear strength, especially on the surface of clothing. [Solution] A downproof fabric comprising a double fabric in which a face fabric made of warp threads W1 and weft threads F1 and a back fabric made of warp threads W2 and weft threads F2 are integrated at a predetermined bonding point, wherein the height of the unevenness on the face fabric side surface of the fabric is 60 μm or more and 100 μm or less, the back fabric has a grid-like protrusion, the height of the unevenness on the back fabric side surface of the fabric is 300 μm or more and 500 μm or less, and the spacing between the protrusions, which is the length of one side of the grid-like protrusions of the back fabric, is 1.5 mm or more and 6 mm or less in the warp direction and / or weft direction.

Description

[Technical Field]

[0001] This invention relates to a thin, lightweight fabric made of double weave. More specifically, this invention relates to a downproof fabric that is thin and lightweight, yet has excellent tear strength, and reduces surface irregularities to enhance abrasion resistance and aesthetics. [Background technology]

[0002] Synthetic fibers are widely used as functional materials for clothing, such as durable water-repellent materials and materials with moisture-wicking and quick-drying properties, for applications including sportswear and general clothing. In particular, demand for sportswear is increasing year by year with the spread of outdoor sports, and there is also a growing demand for lighter and thinner materials for tents, sleeping bags, canvas, and clothing. For this reason, nylon fibers, which generally have a higher breaking strength per denier than polyester, are widely used as the fiber material.

[0003] To meet the demand for lightweight and thin fabrics, for example, fabrics using low-density (i.e., fine) nylon fibers of the 40dtex class are used, and the fabric structure is made into ripstop taffeta to increase tear strength. Ripstop taffeta is a structure in which two or more warp and weft threads are arranged in parallel, separate from the base structure. However, as the density of the constituent threads decreases, the strength of the raw yarn itself decreases, and even if the fabric structure is made into ripstop taffeta to increase tear strength, it is not possible to obtain a fabric with satisfactory tear strength. In addition, if the weave density is reduced, thread slippage in the fabric itself becomes more likely, which does not lead to satisfactory weight reduction.

[0004] Thus, it is difficult to further reduce the weight of conventional lightweight fabrics while maintaining a tear strength that is not problematic in practical use. However, Patent Document 1 below proposes a fabric with a different fiber density arrangement that does not reduce tear strength and is lighter than conventional fabrics, by incorporating high-strength yarns with a specific fiber density into the warp and / or weft threads at regular intervals, in addition to the base yarn, when weaving lightweight fabrics.

[0005] However, while ripstop taffeta and fabrics with varying fiber counts offer improved tear strength, their uneven surface makes them less abrasion-resistant.

[0006] On the other hand, Patent Document 2 discloses a double-woven fabric in which the outer fabric and the inner fabric are integrated, but it lacks abrasion resistance due to the napping process, and also lacks downproof properties to prevent feathers or padding from leaking out.

[0007] Furthermore, Patent Document 3 below describes a heat flux of 84 kW / m 2 A heat-resistant and abrasion-resistant protective garment has been proposed, made from a base fabric that retains 10% or more of its tensile strength after being exposed to flames for 10 seconds. However, this garment is a double-woven fabric using spun yarn, has a high basis weight, and a stiff texture. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Patent No. 3980511 [Patent Document 2] Japanese Patent Application Publication No. 10-158951 [Patent Document 3] Japanese Patent Publication No. 2021-188143 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] In view of the level of prior art described above, the problem that the present invention aims to solve is to provide a fabric that is thin and lightweight, yet has excellent abrasion resistance, aesthetics, and tear strength, especially on the surface of clothing. [Means for solving the problem]

[0010] As a result of intensive studies and repeated experiments aimed at solving the above problems, the present inventors have unexpectedly found that by forming a thin and lightweight fabric as a double woven fabric, suppressing irregularities on the surface of the face weave while forming the back weave in a lattice shape, it is possible to improve the surface abrasion resistance and aesthetic appearance while maintaining tear strength, and have thereby completed the present invention. That is, the present invention is as described below.

[0011] [1] A down-proof fabric comprising a double woven fabric in which a face weave composed of warp yarns W1 and weft yarns F1 and a back weave composed of warp yarns W2 and weft yarns F2 are integrated at binding points at predetermined positions, wherein the irregularity height of the face weave side surface of the fabric is 60 μm or more and 100 μm or less, the back weave has lattice-shaped protrusions, the irregularity height of the back weave side surface of the fabric is 300 μm or more and 500 μm or less, and the protrusion interval, which is the length of one side of the lattice-shaped protrusions of the back weave, is 1.5 mm or more and 6 mm or less in the warp direction and / or the weft direction. [2] The down-proof fabric according to the above [1], wherein each of the warp yarns W1, weft yarns F1, warp yarns W2, and weft yarns F2 is a synthetic fiber multifilament. [3] The down-proof fabric according to the above [1] or [2], wherein the synthetic fiber multifilament is a polyamide multifilament. [4] The down-proof fabric according to any one of the above [1] to [3], wherein the cover factor (CF) of the face weave is 1500 or more and 2000 or less, and the cover factor (CF) of the back weave is 50 or more and 150 or less. [5] The down-proof fabric according to any one of the above [1] to [4], wherein the fineness of each of the warp yarns W1 and weft yarns F1 is 8 dtex or more and 110 dtex or less, the fineness of each of the warp yarns W2 and weft yarns F2 is 17 dtex or more and 220 dtex or less, and the relationships of fineness of warp yarn W1 ≤ fineness of warp yarn W2 and fineness of weft yarn F1 ≤ fineness of weft yarn F2 are satisfied. [6] The basis weight is 30 g / m 2 or more and 50 g / m 2or less, the tear strength according to JIS L 1096-2010 8.17 Method D is 15 N or more for both warp and weft, and the air permeability according to JIS L 1096:2010 8.26.1 (Method A) (Frazier type method) is 0.7 cc(mL) / sec / cm 2 or less, the initial water repellency based on JIS L 1092:2009 7.2 Water Repellency Test (Spray Test) is grade 4 or higher, and after 20 washes based on JIS L 1092:2009 6.2.1 (Method C) (Method using a household electric washing machine), the water repellency is grade 3 or higher, the slippage resistance according to JIS L 1096-2010 8.23 Method B (load 78.4 N) is less than 1.0 mm for both warp and weft, and the abrasion resistance of the fabric surface according to JIS L 1096 A-3 Method (fold method) is grade 4 or higher, the down-proof fabric according to any one of the above [1] to [5]. [7] The down-proof fabric according to any one of the above [1] to [6], wherein one side or both sides of the fabric are subjected to calendering. Effects of the Invention

[0012] The down-proof fabric according to the present invention has a soft hand feel, abrasion resistance, light weight, and rain resistance, and is configured as a double woven fabric with a thin and lightweight fabric. While suppressing unevenness on the surface of the face weave, the back weave is formed in a lattice shape, so that the surface abrasion resistance is enhanced while maintaining the tear strength. Therefore, the down-proof fabric according to the present invention can be suitably used as a functional material such as a durable water-repellent material or a water-absorbent quick-drying functional material in sportswear applications such as down wear and down jackets, textile products such as tents, futons, and sleeping bags, and material applications such as canvas. Brief Description of the Drawings

[0013] [Figure 1] This is a design diagram (weave diagram) of the complete weave when the double woven fabrics of Examples 1 and 3 are viewed from the back weave side. The small black squares indicate warp up. [Figure 2] This is a design diagram of the complete weave when the double woven fabrics of Examples 2 and 4 are viewed from the back weave side. The small black squares indicate warp up. [Figure 3]This is a design drawing of the complete structure of the ripstop fabric (single weave) of Comparative Example 2. [Figure 4] Comparative Example 3 is a design drawing of the complete structure of a fabric with varying fiber density (single-ply fabric) according to Patent Document 3. [Figure 5] This is a design drawing of the complete structure of the double-knitted fabric of Comparative Example 4, viewed from the reverse side. The small black areas indicate the warp direction. [Figure 6] These are images showing the surface roughness of the front and back fabric sides of the double-woven fabric in Example 1, as well as measured surface images. [Figure 7] The image shows the surface roughness of the plain weave fabric of Comparative Example 1, and is a measured surface image. [Figure 8] These are images showing the surface roughness of the lip structure (single-layer fabric) of Comparative Example 2, and measured surface images. [Figure 9] Comparative Example 3 is an image showing the surface roughness of the surface of the fabric with varying fiber density arrangement (single-ply fabric) described in Patent Document 3, and is a measured surface image. [Modes for carrying out the invention]

[0014] Embodiments of the present invention will be described in detail below. One embodiment of the present invention is a downproof fabric made of a double fabric in which a face fabric made of warp threads W1 and weft threads F1 and a back fabric made of warp threads W2 and weft threads F2 are integrated at a predetermined bonding point, wherein the unevenness height of the surface of the face fabric side of the fabric is 60 μm or more and 100 μm or less, the back fabric has a grid-like protrusion, the unevenness height of the surface of the back fabric side of the fabric is 300 μm or more and 500 μm or less, and the spacing between the protrusions, which is the length of one side of the grid-like protrusions of the back fabric, is 1.5 mm or more and 6 mm or less in the warp direction and / or weft direction.

[0015] The yarns used for the warp threads W1 and weft threads F1 that make up the surface fabric are not particularly limited, but can be synthetic fiber multifilaments such as polyester (represented by polyethylene terephthalate and polytrimethylene terephthalate), polyamide, and polypropylene. Among these, synthetic fiber multifilaments such as polyester and polyamide are preferred from the viewpoint of strength and abrasion resistance as clothing. The yarns used for the warp threads W2 and weft threads F2 that make up the reverse fabric are not particularly limited, but can be synthetic fiber multifilaments such as polyester represented by polyethylene terephthalate and polytrimethylene terephthalate, polyamide, polypropylene, high-strength fiber polyarylate, ultra-high molecular weight polyethylene, and liquid crystal polyester. Among these, from the viewpoint of strength as a garment, synthetic fiber multifilaments such as polyamide, high-strength fiber polyarylate, ultra-high molecular weight polyethylene, and liquid crystal polyester are preferred. It is preferable that all the yarns used for the warp threads W1 and weft threads F1, and for the warp threads W2 and weft threads F2, be synthetic fiber multifilaments, and it is particularly preferable that all of them be polyamide multifilaments.

[0016] Warp threads W1 and weft threads F1, and warp threads W2 and weft threads F2 may be supplemented with one or more of the following, as needed: matting agents, micropore forming agents, cationic dyeing agents, color inhibitors, heat stabilizers, flame retardants, fluorescent whitening agents, colorants, antistatic agents, hygroscopic agents, antibacterial agents, inorganic fine particles, etc.

[0017] For the warp threads W1 and weft threads F1, it is preferable to use untwisted or loosely twisted long fibers of 800 T / m or less, more preferably 500 T / m or less, in order to reduce the gaps formed between the warp threads W1 and weft threads F1 and to improve surface abrasion resistance. Furthermore, the warp threads W1 and weft threads F1 may also be subjected to air processing such as covering, false twist crimping, Taslan processing, or interlacing.

[0018] From the viewpoint of texture and lightness, the warp threads W1 and weft threads F1 preferably have a total fineness of 8 dtex or more and 110 dtex or less, more preferably 17 dtex or more and 78 dtex or less, and more preferably 20 dtex or more and 50 dtex or less, and the single fiber fineness preferably is 0.5 or more and less than 5 dtex, and more preferably 1 dtex or more and less than 3 dtex. If the total fiber density is less than 8 dtex, the fabric will be lightweight but will have poor downproof properties as a woven fabric. On the other hand, if the total fiber density exceeds 110 dtex, the fabric will lose its lightweight feel.

[0019] The warp threads W2 and weft threads F2 preferably have a total fineness of 17 dtex or more and 220 dtex or less, more preferably 33 dtex or more and 110 dtex or less, from the viewpoint of texture, lightness, and tear strength, and the single fiber fineness preferably has a fineness of 0.5 dtex or more and less than 5 dtex, more preferably 1 dtex or more and less than 3 dtex. If the total fineness is less than 17 dtex, the tear strength of the fabric will be low, on the other hand, if the total fineness exceeds 220 dtex, the fineness difference between the surface and the weft will be large, making weaving difficult.

[0020] It is preferable that the fineness of both the warp thread W1 and the weft thread F1 is 8 dtex or more and 110 dtex or less, the fineness of both the warp thread W2 and the weft thread F2 is 17 dtex or more and 220 dtex or less, and that the relationship between the fineness of warp thread W1 ≤ fineness of warp thread W2 and the fineness of weft thread F1 ≤ fineness of weft thread F2 is satisfied. It is preferable that W1 and F1 have a fine fineness and a constant cover factor in order to provide lightness and downproofness, and that W2 and F2 are high fineness and high toughness threads in order to improve tear strength. The fineness of W1 may be equal to the fineness of W2, or the fineness of F1 may be equal to the fineness of F2. However, if the fineness of W1 is equal to the fineness of W2 and the fineness of F1 is equal to the fineness of F2, the strength is superior, but the physical properties of the fabric tend to be slightly reduced.

[0021] A woven fabric cannot be completely flat because warp yarns and weft yarns intersect with each other. However, in the down-proof fabric of the present embodiment, the unevenness height on the front fabric side surface of the fabric is 60 μm or more and 100 μm or less, the back fabric has grid-like convex portions, and the unevenness height on the back fabric side surface of the fabric is 300 μm or more and 500 μm or less.

[0022] From the viewpoints of the cover factor (CF) and tear strength of the double woven fabric, the interval between the back-side surface convex portions, which is the length of one side of the grid-like convex portions of the back fabric, is 1.5 mm or more and 6 mm or less in the warp direction and / or the weft direction. This interval can be adjusted by selecting the weave structure, the number ratio of W1 to W2, and / or the number ratio of F1 to F2. This interval in either the warp or weft direction needs to satisfy the above range, and it is preferable that both the warp direction and the weft direction fall within the above range. In the present invention, by making the unevenness on one side (back side) surface of the double woven fabric higher than the unevenness on the opposite side (front side) surface, and setting the interval between convex portions on the back side within a certain range, a double woven fabric excellent in abrasion resistance, tear strength, and down-proof performance can be obtained.

[0023] The basis weight of the double woven fabric is 30 g / m 2 or more and 50 g / m 2 or less, more preferably 35 or more and 50 g / m 2 or less. When the basis weight is less than 30 g / m 2 , the down-proof property deteriorates, while when it exceeds 50 g / m 2 , the hand feeling becomes stiff, which is not preferable for clothing products.

[0024] From the viewpoints of light weight, tear strength, air permeability and the like, it is preferable that the cover factor (CF) of the front woven fabric is 1500 or more and 2000 or less, and the cover factor (CF) of the back woven fabric is 50 or more and 150 or less. Here, the cover factor (CF) is determined by the following formula for each of the front woven fabric (warp yarn W1, weft yarn F1) and the back woven fabric (warp yarn W1, F2) constituting the double woven fabric. CF=N W ×(D W ) 1 / 2+N F ×(D F ) 1 / 2 {In formula, N W This is the warp weave density (threads / inch (2.54cm)), N F This is the weft density (threads / inch (2.54cm)), and D W This is the total fineness of the warp threads (dtex), and D F This is the total fineness (dtex) of the weft threads. If the cover factor (CF) of the outer fabric is less than 1500, the gaps formed between the warp and weft threads become large, making it impossible to maintain downproof properties, etc. On the other hand, if it exceeds 2000, the fabric becomes heavy, the texture deteriorates, and productivity also decreases. On the other hand, the cover factor (CF) of the lining fabric exhibiting a grid pattern (see Figures 1 and 2) is preferably 50 to 150, and more preferably 70 to 120. If the cover factor of the backing fabric is less than 50, it becomes difficult to improve the tear strength. On the other hand, if it exceeds 150, the fabric becomes heavy, the texture deteriorates, and productivity also decreases.

[0025] The structure of the outer fabric of the double-woven fabric is not particularly limited and can be any known weave structure such as plain weave, twill weave, or satin weave, but among these, plain weave is most preferred from the viewpoint of obtaining surface smoothness and excellent abrasion resistance.

[0026] The preferred structure of the back fabric of the double-woven fabric is one in which, from the viewpoint of improving the abrasion resistance of the surface of the front fabric, the portion of the warp threads W2 and weft threads F2 exposed on the surface is small, making it difficult for irregularities to occur, and from the viewpoint of improving tear strength, the structure in which the warp threads W2 and weft threads F2 are largely exposed on the surface of the back fabric is preferred. Specifically, a preferred structure is a double-woven fabric as illustrated in Figures 1 and 2.

[0027] The weaving method for the double-layered fabric can be a conventional method using a conventional loom (for example, a conventional water jet loom, air jet loom, rapier loom, etc.), but from the viewpoint of using two or more types of yarn, it is preferable to use a double-beam loom.

[0028] It is preferable that the outer surface of the double-woven fabric (the surface when used as clothing) is treated with a water-repellent finish. The type of water-repellent agent is not particularly limited. Examples include fluorine-based compounds, hydrocarbon-based compounds, and silicone-based compounds. If necessary, it is preferable to mix an antistatic agent, melamine resin, and catalyst to make a processing agent with a water-repellent concentration of about 3 to 15% by weight, and to treat the surface using this processing agent with a pickup rate of about 50 to 90%. Examples of methods for treating the surface with the processing agent include the pad method and the spray method. Among these, the pad method is preferred for penetrating the processing agent into the interior of the fabric. The pickup rate is the weight ratio (%) of the processing agent to the weight of the fabric (before application of the processing agent).

[0029] Furthermore, applying calendering to the double-woven fabric in at least one of the pre- and post-water-repellent processing steps is preferable because it provides excellent rain resistance and down leakage prevention. In this case, the calendering conditions are preferably a temperature of 130°C or higher (more preferably 140 to 195°C) and a linear pressure within the range of 200 to 20000 N / cm (more preferably 200 to 1000 N / cm).

[0030] Furthermore, conventional dyeing, alkali weight reduction, and napping processes may be performed in at least one of the pre- and post-water-repellent processes. In addition, ultraviolet shielding agents, antibacterial agents, deodorizers, insect repellents, phosphorescent agents, retroreflective agents, negative ion generators, etc., may be added.

[0031] The tear strength of the double-woven fabric is preferably 15N or higher in both the warp and weft directions. Here, the tear strength shall be measured according to JIS L 1096-2010 8.17 Method D.

[0032] The slip resistance of the double-woven fabric is preferably 1.0 mm or less in both the warp and weft directions. Here, the slip resistance shall be measured according to JIS L 1096-2010 8.23 ​​Method B (load 78.4 N).

[0033] The air permeability of the aforementioned double-layered fabric is 0.7 cc(mL) / sec / cm 2 The following is preferred, and more preferably, 0.01 cc (mL) / sec / cm 2 More than 1cc(mL) / sec / cm 2 The following applies. Here, the air permeability shall be measured according to JIS L 1096:2010 8.26.1 (Method A) (Fragile method).

[0034] The initial water repellency of the double-woven fabric is preferably grade 4 or higher, and more preferably grade 4 to 5 or higher. Here, the water repellency shall be measured by JIS L 1092:2009 7.2 water repellency test (spray test). Furthermore, it is preferable that the water repellency of the double-woven fabric is grade 3 or higher after being washed 20 times according to JIS L 1092:2009 6.2.1 (Method C) (Method using a household electric washing machine).

[0035] In this embodiment, the abrasion resistance of the downproof fabric surface, according to JIS L 1096 A-3 method (folding method), is preferably grade 4 or higher. [Examples]

[0036] The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited thereto. First, the measurement methods for each measurement item used in the examples and comparative examples are described below.

[0037] (1) Total fineness, number of filaments (single yarns) The total fineness of the raw yarn and the constituent yarns extracted from the fabric was measured according to JIS L 1013:2010 8.3.1 (Method A) (Fineness). The number of filaments in the raw yarn and the constituent yarn extracted from the fabric was measured in accordance with JIS L 1013:2010 8.4.

[0038] (2) Weaving density The weave density of the fabric at the time of finishing was measured according to JIS L 1096:2010 8.6.1 (Method A). The fabric sample was placed on a flat surface, and after removing any unnatural wrinkles or tension, the number of warp and weft threads per 0.5 cm section was counted at five different locations. The average value for each was calculated and converted to the number of threads per inch (2.54 cm).

[0039] (3) Coverage Factor (CF) The cover factor (CF) was calculated for each of the double-layered fabrics—the front fabric (warp W1, weft F1) and the back fabric (warp W1, F2)—as well as for single-layered fabrics, using the following formula. CF=N W ×(D W ) 1 / 2 +N F ×(D F ) 1 / 2 {In formula, N W This is the warp weave density (threads / inch (2.54cm)), N F This is the weft density (threads / inch (2.54cm)), and D W This is the total fineness of the warp threads (dtex), and D F This is the total fineness (dtex) of the weft threads.

[0040] (4) Air permeability (cc(mL)·cm 2 ·s) Air permeability was measured according to JIS L 1096:2010 8.26.1 (Method A) (Fragile method).

[0041] (5) Height of unevenness (μm) and spacing between protrusions (mm) The surface irregularity height (μm) was measured using a Keyence "One-Shot 3D Microscope VR-3200" under the following measurement conditions. • Cotton roughness (cross-sectional roughness) • Lens: Low magnification lens, Magnification: 12x, Fine mode • Surface shape correction: 5 times stronger undulation removal ·Area area: 4.35×10 8 μm 2 Measure 10mm horizontally. In this measurement, the difference in height between the highest and lowest points of the repeated bumps on the fabric was defined as the bump height, and the distance between adjacent bumps was defined as the bump spacing. The bump height was measured on both sides of the fabric, and the bump spacing was measured in both the warp and weft directions on the back of the fabric (or the side with the higher bump height if the front and back sides are unclear). Both measurements were taken n=5 times at different locations, and the average value was taken.

[0042] (6) Water repellency (grade) Water repellency was measured initially, and after 20 washes according to JIS L 1092:2009 6.2.1 (Method C) (Method using a household electric washing machine), and then according to the 7.2 water repellency test (spray test).

[0043] (7) Tear strength (N) The tear strength (N) of the fabric was measured according to JIS L 1096-2010 8.17 Method D.

[0044] (8) Slip resistance (mm) The slip resistance (mm) of the double-woven fabric was measured according to JIS L 1096-2010 8.23 ​​Method B (load 78.4N).

[0045] (9) Abrasion resistance (grade) The abrasion resistance of the fabric was measured according to JIS L 1096 A-3 method (fold method).

[0046] (10) Weight (g / m 2 ) The mass per unit area of ​​the fabric was measured according to JIS L 1096-2010 8.3 Method A. If a test specimen of the required size could not be obtained, the sample size was changed as appropriate and measured, and the basis weight (g / m²) was calculated from the obtained value. 2 ) was calculated.

[0047] [Example 1] Using nylon 6 multifilament FDY yarn with a total fineness of 22 dtex and 20 filaments as the warp thread W1 of the face fabric, nylon 6 multifilament FDY yarn with a total fineness of 33 dtex and 26 filaments as the weft thread F1 of the face fabric, nylon 6 multifilament FDY yarn with a total fineness of 33 dtex and 26 filaments as the warp thread W2 of the back fabric, and nylon 6 multifilament FDY yarn with a total fineness of 33 dtex and 26 filaments as the weft thread F2 of the back fabric, a raw fabric with the complete structure shown in Figure 1 when viewed from the back fabric side was prepared using a water jet loom. This raw fabric was then subjected to scouring, intermediate setting, dyeing, non-fluorine water-repellent treatment, finishing setting, and reverse calendering to produce a downproof fabric with a warp density of 209 threads / inch (2.54 cm) and a weft density of 166 threads / inch. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0048] [Example 2] Except for preparing the complete fabric structure shown in Figure 2 when viewed from the reverse side, a downproof fabric with a warp density of 208 threads / inch and a weft density of 167 threads / inch was prepared in the same manner as in Example 1. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0049] [Example 3] Using nylon 6 multifilament FDY yarn with a total fineness of 17 dtex and 5 filaments as the warp thread W1 of the face fabric, nylon 6 multifilament FDY yarn with a total fineness of 17 dtex and 5 filaments as the weft thread F1 of the face fabric, nylon 6 multifilament FDY yarn with a total fineness of 17 dtex and 5 filaments as the warp thread W2 of the back fabric, nylon 6 multifilament FDY yarn with a total fineness of 56 dtex and 24 filaments as the weft thread F2 of the back fabric, a raw fabric with the complete structure shown in Figure 1 when viewed from the back fabric side was prepared using a water jet loom. This raw fabric was then subjected to scouring, intermediate setting, dyeing, non-fluorine water-repellent treatment, finishing setting, and calendering to produce a downproof fabric with a warp density of 291 threads / inch (2.54 cm) and a weft density of 210 threads / inch. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0050] [Example 4] Except for preparing the complete fabric structure shown in Figure 2, a downproof fabric with a warp density of 290 threads / inch and a weft density of 212 threads / inch was prepared in the same manner as in Example 3. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0051] [Comparative Example 1] Using nylon 6 multifilament FDY yarn with a total fineness of 22 dtex and 17 filaments as the warp threads, and nylon 6 multifilament FDY yarn with a total fineness of 33 dtex and 24 filaments as the weft threads, a plain weave fabric was prepared using a water jet loom. This fabric was then subjected to scouring, intermediate setting, dyeing, non-fluorine water-repellent treatment, finishing setting, and reverse calendering to produce a downproof fabric with a warp density of 192 threads / inch and a weft density of 145 threads / inch. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0052] [Comparative Example 2] Using nylon 6 multifilament FDY yarn with a total fineness of 22 dtex and 17 filaments as the warp threads, and nylon 6 multifilament FDY yarn with a total fineness of 33 dtex and 24 filaments as the weft threads, a complete ripstop (single weave) fabric was prepared using a water jet loom as shown in Figure 3. This fabric was then subjected to scouring, intermediate setting, dyeing, non-fluorine water-repellent treatment, finishing setting, and reverse calendering to produce a downproof fabric with a warp density of 196 threads / inch (2.54 cm) and a weft density of 138 threads / inch. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0053] [Comparative Example 3] A raw fabric of a mixed-fiber woven fabric (single-ply fabric) was prepared using a water jet loom with a complete structure as shown in Figure 4, following the invention described in Patent Document 3, using nylon 6 multifilament DTY yarn with a total fineness of 17 dtex and 5 filaments, and nylon 6 multifilament FDY yarn with a total fineness of 44 dtex and 34 filaments, arranged in a warp ratio of 11:1 and weft ratio of 8:1. This raw fabric was then subjected to scouring, intermediate setting, dyeing, non-fluorine water-repellent treatment, finishing setting, and reverse calendering to produce a downproof fabric with a warp density of 207 threads / inch (2.54 cm) and a weft density of 150 threads / inch. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0054] [Comparative Example 4] Except for preparing the complete weave shown in Figure 5, a downproof fabric with a warp density of 240 threads / inch (2.54 cm) and a weft density of 189 threads / inch was prepared in the same manner as in Example 1. The physical properties of the obtained downproof fabric after processing are shown in Table 1 below.

[0055] The evaluation results for Examples 1-4 and Comparative Examples 1-4 are shown in Table 1 below. [Table 1] [Industrial applicability]

[0056] The downproof fabric according to the present invention possesses a soft texture, abrasion resistance, lightness, and rain resistance, while being constructed as a thin, lightweight double-woven fabric. By suppressing surface irregularities of the outer fabric and forming the inner fabric in a grid pattern, tear strength is maintained while surface abrasion resistance is enhanced. Therefore, the downproof fabric according to the present invention can be suitably used as a durable water-repellent material or a functional material with water absorption and quick-drying properties in sportswear such as down wear and down jackets, textile products such as tents, futons, and sleeping bags, and materials such as canvas.

Claims

1. A downproof fabric comprising a double fabric in which a face fabric made of warp threads W1 and weft threads F1 and a back fabric made of warp threads W2 and weft threads F2 are integrated at predetermined bonding points, wherein the height of the unevenness on the surface of the face fabric side of the fabric is 60 μm or more and 100 μm or less, the back fabric has a grid-like structure of protrusions, the height of the unevenness on the surface of the back fabric side of the fabric is 300 μm or more and 500 μm or less, and the spacing between the protrusions, which is the length of one side of the grid-like structure of the back fabric, is 1.5 mm or more and 6 mm or less in the warp direction and / or weft direction.

2. The downproof fabric according to claim 1, wherein the warp thread W1, weft thread F1, warp thread W2, and weft thread F2 are all synthetic fiber multifilaments.

3. The downproof fabric according to claim 1 or 2, wherein the synthetic fiber multifilament is a polyamide multifilament.

4. The downproof fabric according to claim 1 or 2, wherein the cover factor (CF) of the outer fabric is 1500 or more and 2000 or less, and the cover factor (CF) of the inner fabric is 50 or more and 150 or less.

5. The downproof fabric according to claim 1 or 2, wherein the fineness of the warp thread W1 and the weft thread F1 is both 8 dtex or more and 110 dtex or less, the fineness of the warp thread W2 and the weft thread F2 is both 17 dtex or more and 220 dtex or less, and the relationship between the fineness of warp thread W1 ≤ fineness of warp thread W2 and the fineness of weft thread F1 ≤ fineness of weft thread F2 is satisfied.

6. Weight: 30g / m ２ 50g / m or more ２ The following conditions apply: the tear strength according to JIS L 1096-2010 8.17 Method D is 15 N or higher in both the warp and weft directions, and the air permeability according to JIS L 1096:2010 8.26.1 (Method A) (Fragile method) is 0.7 cc (mL) / sec / cm ２ The downproof fabric according to claim 1 or 2, wherein the initial water repellency is grade 4 or higher based on the JIS L 1092:2009 7.2 water repellency test (spray test), and the same water repellency is grade 3 or higher after 20 washes according to JIS L 1092:2009 6.2.1 (Method C) (Method using a household electric washing machine), the slip resistance according to JIS L 1096-2010 8.23 ​​Method B (Load 78.4 N) is less than 1.0 mm in both the long and short directions, and the abrasion resistance of the fabric surface according to JIS L 1096 A-3 Method (Fold Method) is grade 4 or higher.

7. The downproof fabric according to claim 1 or 2, wherein one or both sides of the fabric are calendered.

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