Water-repellent fabric and textile product

Abstract

To provide a water-repellent fabric excellent not only in water repellency but also in stretchability, and to provide a textile product using the water-repellent fabric.SOLUTION: The water repellent fabric is subjected to water repellent finishing and contains a composite yarn containing a stretchable fiber and an ultrafine fiber having ≤ 1dtex single fiber fineness.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-repellent fabric that is excellent not only in water repellency but also in stretchability, and to a textile product made using the water-repellent fabric. [Background technology]

[0002] Conventionally, there has been a demand for water-repellent fabrics in fields such as sportswear, casual clothing, and umbrella fabrics, and water-repellent agents such as fluorine-based water-repellent agents have been attached to the fabrics (see, for example, Patent Document 1 and Patent Document 2). In recent years, in consideration of the environment, fabrics have been proposed that use non-fluorine-based water repellents that do not contain compounds that may have an adverse effect on living organisms (e.g., perfluorooctanoic acid, perfluorooctanesulfonic acid, etc.) (see, for example, Patent Document 3). However, these fabrics have the problem of being insufficient in terms of stretchability. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 60-94645 [Patent Document 2] Japanese Patent Publication No. 61-70043 [Patent Document 3] Japanese Patent Application Publication No. 2017-145521 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in view of the above background, and an object of the present invention is to provide a water-repellent fabric that is excellent not only in water repellency but also in stretchability, and a textile product made using the water-repellent fabric. [Means for solving the problem]

[0005] As a result of extensive research to achieve the above object, the inventors have discovered that, in a water-repellent fabric that has been subjected to a water-repellent treatment, by cleverly devising the fibers that make up the fabric, it is possible to obtain a water-repellent fabric that is excellent not only in water repellency but also in stretchability. Further extensive research led to the completion of the present invention.

[0006] Thus, the present invention provides "a water-repellent fabric that has been subjected to a water-repellent treatment, characterized in that the fabric contains a composite yarn that includes an elastic fiber and an ultrafine fiber having a single fiber fineness of 1 dtex or less."

[0007] In this case, the elastic fiber is preferably a bicomponent fiber in which two components are bonded side-by-side or eccentrically in a sheath-core configuration, or a polytrimethylene terephthalate fiber. The fabric is preferably a woven fabric with a cover factor (CF) of 1,000 or more. The cover factor (CF) is defined by the following formula: CF=(DWp / 1.1) 1 / 2 ×MWp+(DWf / 1.1) 1 / 2 ×MWf [DWp is the total warp thread size (dtex), MWp is the warp thread density (counts / 2.54cm), DWf is the total weft thread size (dtex), and MWf is the weft thread density (counts / 2.54cm).]

[0008] In the water-repellent fabric of the present invention, it is preferable that fine fiber loops made of the ultrafine fibers are formed on the fabric surface. It is also preferable that the water-repellent rolling angle of the fabric surface is 15 degrees or less. It is also preferable that the water-repellent level is Grade 4 or higher as measured by the JIS L1092-2009 7.2 Water-Repellency Test (Spray Method). It is also preferable that the water-repellent level is Grade 3 or higher as measured by the JIS L1092-2009 7.2 Water-Repellency Test (Spray Method) after 10 washes as specified in JIS L0217-1995 (using JAFET standard detergent). It is also preferable that the stretchability in the warp or weft direction is 10% or higher as measured by the JIS L1096-2010 8.16 B-1 method. It is also preferable that the stretchability recovery in the warp or weft direction is 85% or higher as measured by the JIS L1096-2010 8.16 B-1 method. Furthermore, it is preferable that the tear strength in the warp or weft direction measured by JIS L1096-2010 8.17 D method is 7N or more. The present invention also provides a textile product made from the water-repellent fabric. [Effects of the Invention]

[0009] According to the present invention, it is possible to obtain a water-repellent fabric that is excellent not only in water repellency but also in stretchability, and a textile product made using the water-repellent fabric. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail. The water-repellent fabric of the present invention is a water-repellent fabric that has been subjected to a water-repellent treatment. The fabric includes a composite yarn, and the composite yarn includes ultrafine fibers having a single fiber fineness of 1 dtex or less (more preferably 0.00002 to 0.8 dtex, particularly preferably 0.001 to 0.5 dtex) and elastic fibers. With this configuration, fine fiber loops made of the ultrafine fibers are formed on the surface of the fabric, thereby forming minute lotus-leaf-like irregularities on the surface of the fabric, thereby achieving excellent water repellency. At the same time, the elastic fibers also provide excellent stretchability to the fabric. Here, if the single fiber fineness of the ultrafine fibers is greater than 1 dtex, fine fiber loops will not be formed, which is undesirable. Furthermore, when forming fine fiber loops, it is preferable that the ultrafine fibers be non-crimped fibers. For example, if the ultrafine fibers are false-twisted crimped yarns, fine fiber loops may not be formed.

[0011] The ultrafine fibers can be polyester fibers, acrylic fibers, nylon fibers, rayon fibers, acetate fibers, and natural fibers such as cotton, wool, and silk, as well as composites of these. Polyester fibers include composite fibers containing a polyester component as at least one component. Examples of composite fibers include side-by-side composite fibers, eccentric sheath-core composite fibers, sheath-core composite fibers, and islands-in-the-sea composite fibers. Nylon fibers include nylon 6 fibers and nylon 66 fibers.

[0012] The polyester forming the polyester fiber is preferably a polyester having terephthalic acid as the main acid component and at least one alkylene glycol selected from the group consisting of ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, and hexamethylene glycol as the main glycol component. Of these, polyesters having ethylene glycol as the main glycol component (polyethylene terephthalate) or polyesters having trimethylene glycol as the main glycol component (polytrimethylene terephthalate) are particularly preferred.

[0013] If necessary, such polyesters may contain a small amount (usually 30 mol % or less) of a copolymerization component. In this case, examples of the difunctional carboxylic acid other than terephthalic acid that can be used include aromatic, aliphatic, and alicyclic difunctional carboxylic acids such as isophthalic acid, naphthalene dicarboxylic acid, diphenyl dicarboxylic acid, diphenoxyethane dicarboxylic acid, β-hydroxyethoxybenzoic acid, p-oxybenzoic acid, 5-sodium sulfoisophthalic acid, adipic acid, sebacic acid, and 1,4-cyclohexane dicarboxylic acid. Examples of diol compounds other than the glycols include aliphatic, alicyclic, and aromatic diol compounds such as cyclohexane-1,4-dimethanol, neopentyl glycol, bisphenol A, and bisphenol S, as well as polyoxyalkylene glycols.

[0014] The polyester may be synthesized by any method. For example, polyethylene terephthalate may be produced by a first-stage reaction, in which terephthalic acid is directly esterified with ethylene glycol, or a transesterification reaction between a lower alkyl ester of terephthalic acid, such as dimethyl terephthalate, and ethylene glycol, or by reacting terephthalic acid with ethylene oxide to produce a glycol ester of terephthalic acid and / or its oligomer, followed by a second-stage reaction, in which the reaction product of the first stage is heated under reduced pressure to undergo polycondensation until the desired degree of polymerization is reached. The polyester may also be a material- or chemically-recycled polyester, or a polyester obtained using a catalyst containing a specific phosphorus compound and a titanium compound, as described in Japanese Patent Application Laid-Open Nos. 2004-270097 and 2004-211268. Furthermore, biodegradable polyesters, such as polylactic acid and stereocomplex polylactic acid, may also be used.

[0015] Furthermore, if the ultrafine fibers contain an ultraviolet absorber in an amount of 0.1% by weight or more (preferably 0.1 to 5.0% by weight) based on the weight of the fibers, ultraviolet shielding properties are imparted to the fabric, which is preferable. Examples of such ultraviolet absorbers include benzoxazine-based organic ultraviolet absorbers, benzophenone-based organic ultraviolet absorbers, benzotriazole-based organic ultraviolet absorbers, and salicylic acid-based organic ultraviolet absorbers. Among these, benzoxazine-based organic ultraviolet absorbers are particularly preferable because they do not decompose during the spinning stage.

[0016] Suitable examples of such benzoxazine-based organic UV absorbers include those disclosed in JP-A-62-11744, such as 2-methyl-3,1-benzoxazin-4-one, 2-butyl-3,1-benzoxazin-4-one, 2-phenyl-3,1-benzoxazin-4-one, 2,2'-ethylenebis(3,1-benzoxazin-4-one), 2,2'-tetramethylenebis(3,1-benzoxazin-4-one), 2,2'-p-phenylenebis(3,1-benzoxazin-4-one), 1,3,5-tri(3,1-benzoxazin-4-one-2-yl)benzene, and 1,3,5-tri(3,1-benzoxazin-4-one-2-yl)naphthalene.

[0017] Furthermore, if the ultrafine fibers contain a matting agent (titanium dioxide) in an amount of 0.1% by weight or more (preferably 0.2 to 4.0% by weight) based on the weight of the fibers, the transparency-proofing properties of the fabric are improved, which is preferable.

[0018] Furthermore, the ultrafine fibers may contain, as needed, one or more of a micropore-forming agent (organic metal sulfonate), a color inhibitor, a heat stabilizer, a flame retardant (antimony trioxide), a fluorescent brightener, a color pigment, an antistatic agent (metal sulfonate), a moisture absorbent (polyoxyalkylene glycol), an antibacterial agent, and other inorganic particles.

[0019] On the other hand, preferred examples of the stretchable fibers include fibers composed of one component made of polytrimethylene terephthalate, composite fibers in which two components are bonded side-by-side or eccentrically in a core-sheath configuration, elastic fibers (polyurethane-based fibers, polyetherester-based fibers, water-absorbent elastomer fibers, etc.), unstretched polyester fibers, and false-twisted crimped yarns.

[0020] Here, the composite fiber is preferably a composite fiber in which at least one component is made of polytrimethylene terephthalate, polybutylene terephthalate, or polyethylene terephthalate. Specific examples of such two components include polytrimethylene terephthalate and polytrimethylene terephthalate, polytrimethylene terephthalate and polyethylene terephthalate, polyethylene terephthalate and polyethylene terephthalate, and polyethylene terephthalate and polybutylene terephthalate.

[0021] Here, polytrimethylene terephthalate refers to a fiber made of polyester containing trimethylene terephthalate units as the main repeating unit, and refers to fibers containing trimethylene terephthalate units in an amount of 50 mol% or more, preferably 70 mol% or more, more preferably 80 mol% or more, and particularly preferably 90 mol% or more. Therefore, the fiber contains polytrimethylene terephthalate containing other acid components and / or glycol components as third components in a total amount of 50 mol% or less, preferably 30 mol% or less, more preferably 20 mol% or less, and particularly preferably 10 mol% or less.

[0022] Polytrimethylene terephthalate is produced by condensing terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under suitable reaction conditions.

[0023] Examples of the third component to be added include aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexanedicarboxylic acid, etc.), aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.), aliphatic glycols (ethylene glycol, 1,2-trimethylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexane glycol, etc.), aromatic dioxy compounds (hydroquinone bisphenol A, etc.), aliphatic glycols containing aromatic groups (1,4-bis(β-hydroxyethoxy)benzene, etc.), and aliphatic oxycarboxylic acids (p-oxybenzoic acid, etc.).

[0024] The polyethylene terephthalate may be a copolymer of three components, may be material recycled or chemically recycled, or may be obtained using a catalyst containing a specific phosphorus compound and a titanium compound, as described in JP-A Nos. 2004-270097 and 2004-211268.

[0025] The polytrimethylene terephthalate, polyethylene terephthalate, polybutylene terephthalate, etc. may contain one or more of a micropore-forming agent, a cationic dye dyeable agent, a coloration inhibitor, a heat stabilizer, a fluorescent whitening agent, a matting agent, a colorant, a moisture absorbent, and inorganic fine particles.

[0026] The above-mentioned composite fiber can be produced, for example, by the method described in JP-A-2009-46800. There are no particular restrictions on the single fiber fineness of the elastic fiber, but it is preferably within the range of 0.00002 to 5.0 dtex (more preferably 0.1 to 3.0 dtex, and particularly preferably 1.1 to 2.5 dtex).

[0027] In addition, in the ultrafine fibers and / or the stretchable fibers, examples of the cross-sectional shape of a single fiber include a round cross section, an oval cross section, a triangle, a square, a cross, a flat, a flat with a waist, an H-shape, a W-shape, and the like.

[0028] The water-repellent fabric of the present invention includes a composite yarn containing the ultrafine fiber and the elastic fiber. The method for producing the composite yarn is not particularly limited. For example, the ultrafine fiber and the elastic fiber, and optionally other fibers, may be aligned and air-mixed by air processing (interlacing or Taslan® processing), or composite false twisting may be performed. The air-mixing method is particularly preferred.

[0029] In this case, the composite yarn is preferably an interlaced yarn that has been subjected to an interlacing process with the number of interlaces being 1 to 150 / m. When combining the three types of fibers, the overfeed rate may be changed as appropriate. Alternatively, two types of fibers may be combined first, and then other yarns may be combined in the next step. In such a composite yarn, the total fineness is preferably within the range of 40 to 180 dtex.

[0030] The fabric of the present invention contains the composite yarn, and the composite yarn preferably accounts for 30% by weight or more (most preferably 100% by weight) of the fabric weight.

[0031] The fabric of the present invention is not particularly limited in its weave, but woven fabrics are preferred for achieving excellent water repellency. The weave of the fabric is not particularly limited. Examples include three-pronged weaves such as plain weave, twill weave, and satin weave, alternating weaves, single-sided weaves such as warp double weave and weft double weave, and warp velvet. The number of layers may be a single layer or two or more layers.

[0032] Furthermore, if the cover factor CF of the woven fabric defined by the following formula is 1000 or more (preferably 1500 to 4000, particularly preferably 2300 to 3500), even better water repellency can be obtained, which is preferred. CF=(DWp / 1.1) 1 / 2 ×MWp+(DWf / 1.1) 1 / 2 ×MWf Here, DWp is the total warp fineness (dtex), MWp is the warp weave density (counts / 2.54cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (counts / 2.54cm).

[0033] In addition, in order to obtain excellent water repellency, the weave density is preferably in the range of a warp density of 110 threads / 2.54 cm or more (more preferably 120 to 170 threads / 2.54 cm) and a weft density of 90 threads / 2.54 cm or more (more preferably 100 to 150 threads / 2.54 cm).

[0034] The fabric of the present invention can be produced, for example, by the following method. That is, first, the composite yarn is used to knit or weave a fabric. In this case, the knitting or weaving method may be a conventional knitting or weaving method using a conventional loom (for example, a conventional water jet loom, air jet loom, rapier loom, etc.) or knitting machine. The composite yarn may also be twisted to a twist coefficient of about 30,000 or less (preferably 500 to 30,000) as expressed by the following formula. The twist number is preferably in the range of 100 to 2,000 t / m. (Twist coefficient) = number of twists [t / m] × (fineness [de]) 1 / 2 However, the fineness [de] is the value obtained by multiplying the fineness [dtex] by 0.9.

[0035] Next, the fabric is subjected to a scouring treatment or a dyeing treatment (preferably a scouring treatment and a dyeing treatment). At this time, if the stretchable fiber is a composite fiber, the heat treatment in the scouring treatment or the dyeing treatment makes the latent crimp of the composite fiber actual, causing the fabric to shrink, improving the density of the fabric and simultaneously making the ultrafine fibers relatively longer, so that fine fiber loops made of the ultrafine fibers are formed on the surface of the fabric.

[0036] Next, the fabric is subjected to a water-repellent treatment. The type of water-repellent agent used in this water-repellent treatment is not particularly limited. Examples include fluorine-based compounds, hydrocarbon-based compounds, silicone-based compounds, and other environmentally friendly water-repellent agents. If necessary, an antistatic agent, melamine resin, and catalyst are mixed to form a water-repellent agent having a concentration of approximately 3 to 15% by weight, and the fabric surface is preferably treated with this agent at a pickup rate of approximately 50 to 90%. Examples of methods for treating the fabric surface with the agent include padding and spraying. Among these, padding is preferred because it allows the agent to penetrate deep into the fabric. The pickup rate is the weight ratio (%) of the agent to the weight of the fabric (before application of the agent).

[0037] The antistatic agent is preferably a polyester resin containing a polyethylene glycol group, a urethane resin containing a polyethylene glycol group, a reaction product of a polycationic compound containing a polyethylene glycol group with a diglycidyl ether, etc. Antistatic compounds may also be used, such as anionic surfactants such as higher alcohol sulfates, sulfated oils, sulfonates, and phosphates, cationic surfactants such as amine salts, quaternary ammonium salts, and imidaline quaternary salts, nonionic surfactants such as polyethylene glycols and polyhydric alcohol esters, and amphoteric surfactants such as imidaline quaternary salts, alanine types, and betaine types.

[0038] In addition, conventional dyeing, alkali weight reduction, and nap raising may be performed before or after the water-repellent treatment. Furthermore, UV screening agents, antibacterial agents, deodorizers, insect repellents, luminescent agents, retroreflective agents, negative ion generators, etc. may also be added. When composite fibers are included in the fabric, the latent crimp of the composite fibers becomes apparent (coiled) due to the thermal history of the dyeing treatment, etc.

[0039] The water-repellent fabric thus obtained contains the composite yarn, and therefore fine fiber loops made of the ultrafine fibers are formed on the surface of the fabric, resulting in lotus-leaf-like minute irregularities on the surface of the fabric. The fine fiber loops form tiny air spaces, which provide excellent water repellency when water droplets fall on the surface of the fabric. This effect is sometimes called the lotus effect.

[0040] In this case, the water repellency is such that the water repellent rolling angle of the fabric surface is preferably 20 degrees or less (more preferably 15 degrees or less, even more preferably 12 degrees or less, and particularly preferably 5 to 11 degrees).

[0041] The water-repellent rolling angle is the angle at which the water droplet begins to roll when 0.2 cc of water is gently dropped onto a flat sample to be measured mounted on a horizontal plate and the plate is gently tilted at a uniform speed.

[0042] Furthermore, the water repellency measured by the JIS L1092-2009 7.2 Water Repellency Test (Spray Method) is preferably at least Grade 4. Furthermore, after 10 washes as specified in JIS L0217-1995 (using JAFET standard detergent), the water repellency measured by the JIS L1092-2009 7.2 Water Repellency Test (Spray Method) is preferably at least Grade 3.

[0043] The water-repellent fabric of the present invention contains the composite yarn, and since the composite yarn contains the elastic fiber, the fabric also has elasticity (stretchability). In this case, the stretchability in the warp or weft direction (preferably the warp and weft directions) measured according to JIS L1096-2010 8.16 B method is preferably 10% or more (more preferably 10 to 30%). Furthermore, the stretch recovery rate in the warp or weft direction (preferably the warp and weft directions) measured according to JIS L1096-2010 8.16 B-1 method is preferably 85% or more.

[0044] In addition, the water-repellent fabric of the present invention preferably has a tear strength of 7 N or more (more preferably 20 to 100 N) in the warp or weft direction (preferably warp and weft directions) measured according to JIS L1096-2010 8.17 D method. Furthermore, the fabric weight is preferably 200 g / m² in terms of lightness. 2 or less (more preferably 100 to 180 g / m 2 ) is preferred.

[0045] Next, the textile product of the present invention contains the water-repellent fabric. Because the textile product contains the fabric, it has excellent water repellency and stretchability. The textile product includes umbrella fabric and clothing. The clothing includes down garments, badminton shirts, running shirts, soccer pants, tennis pants, basketball pants, table tennis pants, badminton pants, running pants, golf pants, various sports undershirts, various sports innerwear, sweaters, T-shirts, jerseys, sweatshirts, windbreakers, jackets, dustproof clothing, medical gowns, and the like. [Example]

[0046] Examples and comparative examples of the present invention will be described in detail below, but the present invention is not limited to these. The measurement items in the examples were measured by the following methods.

[0047] (1) Stretchability, The stretchability (%) was measured according to JIS L 1096-2010 8.16 B method.

[0048] (2) Stretch recovery rate The stretch recovery rate (%) was measured according to JIS L 1096-2010 8.16 B-1 method.

[0049] (3) Tear strength of fabric The tear strength (N) was measured according to JIS L 1096-2010 8.17 D method.

[0050] (4) Cover Factor The cover factor CF of the woven fabric was calculated using the following formula. CF=(DWp / 1.1 )1 / 2 ×MWp+(DWf / 1.1) 1 / 2 ×MWf Here, DWp is the total warp fineness (dtex), MWp is the warp weave density (counts / 2.54cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (counts / 2.54cm).

[0051] (5) Water repellency (water repellent rolling angle) A 0.2cc drop of water was gently dropped onto a flat sample mounted on a horizontal plate, and the plate was gently tilted at a constant speed. The angle at which the water droplet began to roll was taken as the water-repellent rolling angle. The smaller the water-repellent rolling angle, the better the water repellency, and a value of 25 degrees or less was considered acceptable.

[0052] (6) Water repellency The water repellency (grade) was measured according to JIS L1092-2009 7.2 Water repellency test (spray method).

[0053] (7) Fabric weight Fabric weight (g / m 2 ) was measured.

[0054] [Example 1] Polyethylene terephthalate was spun at a spinning temperature of 300°C, taken up at 4000 m / min, and then stretched 1.3 times without being taken up, to obtain a polyester multifilament 70 dtex / 144 fil (ultrafine fiber made of non-crimped fibers) with a round cross-sectional shape.

[0055] Furthermore, by using the method described in Example 24 of JP 2009-46800 A, only the total fineness and the number of filaments were changed to obtain a composite fiber (elastic fiber) with a total fineness of 56 dtex / 36 fil in which a polytrimethylene terephthalate (PTT) component and a polyethylene terephthalate (PET) component were bonded side-by-side.

[0056] Next, the non-crimped yarn and a composite fiber (elastic fiber) were combined and subjected to air entanglement treatment to obtain a composite yarn (total fineness 126 dtex / 180 fil). Next, the composite yarn was arranged as a warp and a weft, and a plain weave fabric (a fabric made only of the composite yarn) was woven using a conventional water jet loom.

[0057] The fabric was then subjected to a spread scouring treatment at 95°C using a scouring device. It was then dyed with a disperse dye using a jet dyeing machine at 130°C, and then subjected to the following water-repellent treatment. The water-repellent treatment was carried out using the following processing agent, with the fabric squeezed out at a pickup rate of 80%, dried at 130°C for 3 minutes, and then heat-treated at 170°C for 45 seconds. <Processing agent composition> Fluorine-free water repellent 5.0wt% (Nicca Chemical Co., Ltd., NeoseedNR-7080, hydrocarbon compound) Melamine resin 0.3wt% (Sumitomo Chemical Co., Ltd., Sumitex Resin M-3) Catalyst 0.3wt% (Sumitomo Chemical Co., Ltd., Sumitex Accelerator ACX) Water 94.4wt%

[0058] The water-repellent fabric thus obtained had a basis weight of 153 g / m 2The fabric had a warp density of 123 threads / 2.54 cm, a weft density of 104 / 2.54 cm, a cover factor of 2417, a warp tear strength of 46 N, a weft tear strength of 25 N, a warp stretch of 11%, a warp stretch recovery of 90%, a weft stretch of 35%, a weft stretch recovery of 87%, and a rolling angle of 9°. The water-repellent fabric had fine fiber loops (lotus leaf-shaped minute irregularities) formed on the surface of the ultrafine fibers. The water-repellent fabric had a water-repellent level of 4, and after 10 washes according to JIS L0217-1995 (using JAFET standard detergent), the water-repellent level was 3. Furthermore, since the water-repellent fabric contained the water-repellent agent, it was an environmentally friendly fabric. A windbreaker (sportswear) was sewn using the water-repellent fabric, and when a tester wore the windbreaker, the windbreaker exhibited excellent water repellency and stretchability.

[0059] [Example 2] Polyethylene terephthalate was spun at a spinning temperature of 300°C, taken up at 4000 m / min, and then stretched 1.3 times without being taken up, to obtain a polyester multifilament 70 dtex / 144 fil (ultrafine fiber made of non-crimped fibers) with a round cross-sectional shape.

[0060] Furthermore, by using the method described in Example 24 of JP 2009-46800 A, only the total fineness and the number of filaments were changed to obtain a composite fiber (elastic fiber) with a total fineness of 56 dtex / 36 fil in which a polytrimethylene terephthalate (PTT) component and a polyethylene terephthalate (PET) component were bonded side-by-side.

[0061] Next, the non-crimped yarn and a composite fiber (elastic fiber) were combined and subjected to air entanglement treatment to obtain a composite yarn (total fineness 126 dtex / 180 fil). Next, after twisting at Z400t / m, the composite yarn was arranged as the warp and weft yarns, and a plain weave fabric (a fabric composed only of the composite yarn) was woven using a conventional water jet loom.

[0062] The fabric was then subjected to a spread scouring treatment at 95°C using a scouring device. It was then dyed with a disperse dye using a jet dyeing machine at 130°C, and then subjected to the following water-repellent treatment. The water-repellent treatment was carried out using the following processing agent, with the fabric squeezed out at a pickup rate of 80%, dried at 130°C for 3 minutes, and then heat-treated at 170°C for 45 seconds. <Processing agent composition> Fluorine-free water repellent 5.0wt% (Nicca Chemical Co., Ltd., NeoseedNR-7080, hydrocarbon compound) Melamine resin 0.3wt% (Sumitomo Chemical Co., Ltd., Sumitex Resin M-3) Catalyst 0.3wt% (Sumitomo Chemical Co., Ltd., Sumitex Accelerator ACX) Water 94.4wt%

[0063] The water-repellent fabric thus obtained had a basis weight of 155 g / m 2 The fabric had a warp density of 125 threads / 2.54 cm, a weft density of 106 / 2.54 cm, a cover factor of 2459, a warp tear strength of 44 N, a weft tear strength of 24 N, a warp stretch of 11%, a warp stretch recovery of 91%, a weft stretch of 36%, a weft stretch recovery of 88%, and a rolling angle of 8°. The water-repellent fabric had fine fiber loops (lotus leaf-shaped minute irregularities) formed on the surface of the ultrafine fibers. The water-repellent fabric had a water-repellent level of 4, and after 10 washes according to JIS L0217-1995 (using JAFET standard detergent), the water-repellent level was 3. Furthermore, since the water-repellent fabric contained the water-repellent agent, the water-repellent fabric was environmentally friendly. A windbreaker (sportswear) was sewn using the water-repellent fabric, and when a tester wore the windbreaker, the windbreaker exhibited excellent water repellency and stretchability.

[0064] [Example 3] Polyethylene terephthalate was spun at a spinning temperature of 300°C, taken up at 4000 m / min, and then stretched 1.3 times without being taken up, to obtain a polyester multifilament 70 dtex / 72 fil (ultrafine fiber made of non-crimped fibers) with a round cross-sectional shape.

[0065] Furthermore, by using the method described in Example 24 of JP 2009-46800 A, only the total fineness and the number of filaments were changed to obtain a composite fiber (elastic fiber) with a total fineness of 33 dtex / 24 fil in which a polytrimethylene terephthalate (PTT) component and a polyethylene terephthalate (PET) component were bonded side-by-side.

[0066] Next, the non-crimped yarn and a composite fiber (elastic fiber) were combined and subjected to air entanglement treatment to obtain a composite yarn (total fineness 100 dtex / 96 fil). Next, after twisting at Z800t / m, the composite yarn was arranged as the warp and weft yarns, and a twill fabric (a fabric composed only of the composite yarn) was woven using a conventional water jet loom.

[0067] The fabric was then subjected to a spread scouring treatment at 95°C using a scouring device. It was then dyed with a disperse dye using a jet dyeing machine at 130°C, and then subjected to the following water-repellent treatment. The water-repellent treatment was carried out using the following processing agent, with the fabric squeezed out at a pickup rate of 80%, dried at 130°C for 3 minutes, and then heat-treated at 170°C for 45 seconds. <Processing agent composition> Fluorine-free water repellent 5.0wt% (Nicca Chemical Co., Ltd., NeoseedNR-7080, hydrocarbon compound) Melamine resin 0.3wt% (Sumitomo Chemical Co., Ltd., Sumitex Resin M-3) Catalyst 0.3wt% (Sumitomo Chemical Co., Ltd., Sumitex Accelerator ACX) Water 94.4wt%

[0068] The water-repellent fabric thus obtained had a basis weight of 156 g / m 2 The fabric had a warp density of 163 threads / 2.54 cm, a weft density of 130 / 2.54 cm, a cover factor of 2459, a warp tear strength of 42 N, a weft tear strength of 37 N, a warp stretch of 12%, a warp stretch recovery of 96%, a weft stretch of 21%, a weft stretch recovery of 90%, and a rolling angle of 9°. The water-repellent fabric had fine fiber loops (lotus leaf-shaped minute irregularities) formed on the surface of the ultrafine fibers. The water-repellent fabric had a water-repellent level of 4, and after 10 washes according to JIS L0217-1995 (using JAFET standard detergent), the water-repellent level was 3. Furthermore, since the water-repellent fabric contained the water-repellent agent, the water-repellent fabric was environmentally friendly. A windbreaker (sportswear) was sewn using the water-repellent fabric, and when a test subject wore the windbreaker, the windbreaker exhibited excellent water repellency and stretchability.

[0069] [Comparative Example 1] The same procedure as in Example 1 was repeated except that the number of filaments in the ultrafine fibers was changed to polyester multifilament 70 dtex / 36 fil (non-crimped fiber, single fiber fineness 1.9 dtex), which was used as the warp and weft to form a composite yarn (total fineness 126 dtex / 72 fil).

[0070] The resulting water-repellent fabric had a basis weight of 155 g / m 2 The fabric had a warp density of 125 threads / 2.54cm, a weft density of 105 / 2.54cm, a cover factor of 2449, a tear strength of 42N warp, 27N weft, a warp stretch of 12%, a warp stretch recovery of 92%, a weft stretch of 33%, and a weft stretch recovery of 88%, all of which were good results, but the rolling angle was 18 degrees. Furthermore, no fine irregularities were formed, and after 10 washes according to JIS L0217-1995 (using JAFET standard detergent), the water repellency was grade 2.

[0071] Comparative Example 2 In Example 1, the composite fiber (elastic fiber) was replaced with polyester multifilament 56 dtex / 36 fil (non-crimped fiber), and a composite yarn (total fineness 126 dtex / 180 fil) was obtained. The procedure was the same as in Example 1, except that the composite yarn was then used as the warp and weft.

[0072] The resulting water-repellent fabric had a basis weight of 144 g / m 2 The warp density was 116 threads / 2.54cm, the weft density was 98 / 2.54cm, the cover factor was 2279, and the tear strength was good at 35N in the warp direction and 22N in the weft direction, but the stretchability was less than 10%. The rolling angle was 12 degrees.

[0073] Comparative Example 3 The same procedure as in Example 1 was carried out except that the water-repellent treatment was not carried out. The fabric thus obtained had a basis weight of 154 g / m 2 The fabric had a warp density of 124 threads / 2.54 cm, a weft density of 102 / 2.54 cm, a cover factor of 2406, a warp tear strength of 30 N and a weft tear strength of 20 N, a warp stretch of 12%, a warp stretch recovery of 90%, a weft stretch of 36%, and a weft stretch recovery of 90%, and fine fiber loops (lotus leaf-shaped fine irregularities) made of the ultrafine fibers were formed on the surface of the fabric. However, the water-repellent fabric had a water-repellency rating of Grade 0, and after 10 washings according to JIS L0217-1995 (however, using JAFET standard detergent), the water-repellency rating was Grade 0, indicating that the fabric had poor water-repellency. [Industrial Applicability]

[0074] According to the present invention, a water-repellent fabric having excellent stretchability as well as water repellency, and a textile product using the water-repellent fabric can be obtained, and the industrial value of the fabric is extremely great.

Claims

1. A water-repellent fabric that has been subjected to a water-repellent treatment, the fabric comprising a composite yarn that includes an elastic fiber and an ultrafine fiber having a single fiber fineness of 1 dtex or less, The elastic fiber is a composite fiber in which two components are bonded in a side-by-side or eccentric core-sheath configuration, The composite yarn is an air-mixed yarn, The water-repellent treatment is performed using a non-fluorine-containing water-repellent agent, The water-repellent rolling angle of the fabric surface is 15 degrees or less, The water-repellent fabric is characterized in that the ultrafine fibers contain a matting agent in an amount of 0.1% by weight or more based on the weight of the fibers.

2. The water-repellent fabric according to claim 1, wherein the fabric is a woven fabric having a cover factor CF of 1000 or more. Here, the cover factor CF is defined by the following formula. CF=(DW0 / 1.1) １／２ ×MW0+(DWf / 1.1) １／２ ×MWf [DWp is the total warp fineness (dtex), MWp is the warp weave density (counts / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (counts / 2.54 cm)]

3. 3. The water-repellent fabric according to claim 1, wherein the microfiber loops made of the ultrafine fibers are formed on the surface of the fabric.

4. The water-repellent fabric according to any one of claims 1 to 3, having a water-repellent degree of 4 or higher as measured by JIS L1092-2009 7.2 Water-repellent test (spray method).

5. 5. The water-repellent fabric according to claim 1, wherein the water-repellent degree is grade 3 or higher as measured by the water-repellent degree test (spray method) of JIS L 1092-2009 7.2 after 10 times of washing as specified in JIS L0217-1995 (using JAFET standard detergent).

6. The water-repellent fabric according to any one of claims 1 to 5, having a stretchability of 10% or more in the warp or weft direction as measured by JIS L1096-2010 8.16 B method.

7. The water-repellent fabric according to any one of claims 1 to 6, having a stretch recovery rate in the warp direction or weft direction of 85% or more, measured by JIS L1096-2010 8.16 B-1 method.

8. The water-repellent fabric according to any one of claims 1 to 7, having a warp or weft tear strength of 7N or more, measured by JIS L1096-2010 8.17 D method.

9. A textile product made using the water-repellent fabric according to any one of claims 1 to 8.