TWI719871B - swimsuit - Google Patents

Abstract

The present invention is a swimsuit 23 comprising polyurethane elastic yarn. The polyurethane elastic yarn contains a cationic high molecular weight compound A with a number average molecular weight of 2000 or more in the range of 0.5-10% by mass, and contains an inorganic chlorine degradation inhibitor B. The mass ratio of the cationic high molecular weight compound A/the above-mentioned inorganic chlorine degradation inhibitor B satisfies the range of 0.3 to 3, the above-mentioned polyurethane elastic yarn is given a silicone-based oiling agent, and the above-mentioned swimwear fabric is subjected to water-repellent processing. The aforementioned swimsuit 23 preferably comprises polyurethane elastic yarn. The fluorine (F)/carbon (C) ratio of the element mass concentration measured by a scanning electron microscope-energy dispersive X-ray spectrometer (SEM-EDX) on the polyurethane elastic yarn is It is 0.030 or more. Thereby, a swimsuit with high water repellency, low water retention rate, and high buoyancy is provided.

Description

swimsuit

The present invention relates to a swimsuit containing polyurethane elastic yarn which has high water repellency, is not easy to wet when immersed in water, and maintains a low water retention rate for a long time.

In order to impart water and oil repellency to clothing and industrial materials made of fiber products, water and oil repellents composed of fluorine-based compounds have been widely used. However, it has been discovered that the fluorine-based water and oil repellent contains compounds that may affect the living environment and organisms, such as perfluorooctanoic acid (hereinafter referred to as PFOA), perfluorooctane sulfonic acid (hereinafter referred to as PFOS), etc., so it is urgently desired Use fluorine-based water and oil repellent fiber products that do not contain these compounds. PFOA is mixed into the water repellent in the form of trace impurities during the manufacturing process of the fluorine-based water repellent, but the mechanism is still unclear. In the case where the carbon number of the polyfluoroalkyl group is 8 or more, PFOA may be produced after decomposition due to some influence, so even if it is decomposed, it will not produce PFOA, which has a polyfluoroalkyl group with a carbon number of 6 or less. Fluorine-based water-repellent agents. Currently, there have been proposed water- and oil-repellent fabrics that are heat-treated with PFOA-free fluorine-based water-repellents and crosslinking agents (Patent Document 1); or the concentration of PFOA and/or PFOS is less than 5 The fluorine-based water-repellent compound of ng/g is fixed on the surface of the monofilament, and the fluorine-based compound is further fixed in a layered form in a two-layer structure (Patent Document 2). However, compared with fluorine-based water repellents containing PFOA with carbon number 8 or more, these are those with lower water repellency. In order to improve the water repellency, the following method is proposed, that is, through at least one selected from the group-containing compound and polyphenol-based compound fixed on the surface of the fiber, part of which contains a specific fluoroalkyl alcohol (a A method of fixing a polymer of an acrylic derivative, a melamine resin, and a water-dispersed polyfunctional isocyanate-based crosslinking agent on the fiber surface (Patent Document 3), etc. According to this method, although a low water retention rate can be achieved, when it is immersed in water for a long time, its water repellency is lower than that of a fluorine-based water repellent containing PFOA with a carbon number of 8 or more. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2007-270374 A [Patent Document 2] JP 2010-150693 A [Patent Document 3] JP 2014-194098 A

[The problem to be solved by the invention]

As mentioned above, the prior art still has problems in making swimwear with higher water repellency, and seeks swimwear with higher water repellency, lower water retention rate, and higher buoyancy. In order to solve the aforementioned problems in the past, the present invention provides a swimsuit with high water repellency, low water retention rate, and high buoyancy. [Technical means to solve the problem]

The swimsuit of the present invention contains polyurethane elastic yarn, characterized in that the polyurethane elastic yarn contains a cationic high molecular weight compound A with a number average molecular weight of 2000 or more in the range of 0.5-10% by mass, and contains an inorganic chlorine degradation inhibitor B. The mass ratio of the cationic high molecular weight compound A/the inorganic chlorine degradation inhibitor B satisfies the range of 0.3 to 3, and the polyurethane elastic yarn is given a silicone oil, and the swimwear fabric is water-repellent. [Effects of Invention]

By improving the water repellency of the polyurethane elastic yarn itself, the present invention can provide a swimsuit with high water repellency, low water retention rate and high buoyancy. This kind of swimsuit has the advantage of being able to swim at high speed for competitive athletes and the advantage of being able to swim easily for ordinary swimmers.

The inventors of the present invention focused on polyurethane elastic yarns that have received little attention so far in order to make fiber materials such as swimwear water repellent, and conducted various studies to improve the water repellency of the polyurethane elastic yarn itself. It turns out that if a specific polyurethane elastic yarn is selected, its compatibility with the water-repellent agent is better.

The polyurethane elastic yarn of the present invention contains a cationic high molecular weight compound A with a number average molecular weight of 2000 or more in the range of 0.5-10% by mass, and contains an inorganic chlorine degradation inhibitor B, the cationic high molecular weight compound A/the inorganic The mass ratio of the chlorine deterioration inhibitor B satisfies the range of 0.3 to 3, and the polyurethane elastic yarn is given a silicone oil. If a swimsuit containing the polyurethane elastic yarn is processed for water repellency, a swimsuit with high water repellency, low water retention and excellent water and oil repellency can be obtained, which is difficult to wet when immersed in water for a long time.

In the present invention, any type can be used as the water-repellent processing agent, and it is preferable to use the element mass concentration measured by SEM-EDX on the polyurethane elastic yarn, fluorine (F)/carbon (C) (hereinafter referred to as F) /C) Treatment agent with a ratio of 0.030 or more. In the element mass concentration measured by SEM-EDX on the polyurethane elastic fiber, the F/C ratio is 0.030 or more, indicating that the adhesion amount of the fluorine-based water repellent is large. When the F/C ratio is less than 0.03, the fluorine The water-repellent agent has a small amount of adhesion and tends to fail to obtain sufficient low wettability. The F/C ratio is more preferably 0.045 or more.

The water-repellent process of the present invention preferably includes a water-repellent agent and a crosslinking agent. As the crosslinking agent, a melamine resin, a water-dispersible polyfunctional isocyanate-based crosslinking agent, etc. are preferably used, and these may be used in combination. The above-mentioned melamine resin includes trimethylol melamine, hexamethylol melamine, and the like. The above-mentioned water-dispersible polyfunctional isocyanate-based crosslinking agent is not particularly limited as long as it is an organic compound containing two or more isocyanate functional groups in the molecule, and examples thereof include: tolylene diisocyanate and hexamethylene diisocyanate , Diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, triphenyl triisocyanate, xylene diisocyanate, dicyclohexylmethane diisocyanate, etc. More preferably, it is a multifunctional blocked isocyanate crosslinking agent obtained by reacting the following components. The above-mentioned components refer to trimethylolpropane tolylene diisocyanate adducts, glycerol tolylene diisocyanate adducts, etc. Breaking compounds (compounds that regenerate isocyanate groups by heating with isocyanate adduct to 70~200°C), phenol, diethyl malonate, methyl ethyl ketoxime, sodium bisulfite , Ε-Caprolactam and so on. Preferably, the melamine resins are mixed at a ratio of 1-40% by mass relative to the solid content of the water-repellent, and the polyfunctional isocyanate-based crosslinking agent is mixed at a ratio of 1-10% by mass relative to the solid content of the water-repellent. The ratio of mixing.

When the swimsuit of the present invention is set to 100% by mass, it preferably contains polyurethane elastic yarn from 5 to 70% by mass, more preferably from 5 to 60% by mass, still more preferably from 5 to 50% by mass, particularly preferably 5 ~40% by mass. Thereby, even if the polyurethane elastic yarn is included, the high water repellency and low water retention rate of the entire swimsuit can be maintained. For other fiber yarns, synthetic fiber yarns such as polyester yarn, nylon yarn, and polypropylene yarn can be used arbitrarily.

The water repellency of the swimsuit of the present invention is preferably level 4 or higher in the spray test specified in JIS L 1092, and more preferably level 5. If the water repellency is 4 or higher, it is suitable for swimwear. In addition, the water retention rate of the swimsuit after 60 minutes is preferably 50% by mass or less of the mass of the swimsuit, more preferably 40% by mass or less, and still more preferably 30% by mass or less.

The polyurethane elastic yarn may be bare yarn, or may be covered by other synthetic fiber yarns. The covering yarn can be a single-layer covering yarn or a double-layer covering yarn. As a swimsuit, a woven fabric or knitted fabric having a structure in which polyurethane elastic fiber yarn is covered in a yarn shape with other synthetic fibers is preferable. There are no particular restrictions on other synthetic fibers, and it can be used: polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate or copolyesters with these as the main component Polyester synthetic fiber yarn represented by fiber yarn, polyamide synthetic fiber yarn represented by nylon 6 or nylon 6,6, synthetic fiber such as polypropylene fiber yarn. Among them, polyamide-based or polyester-based fiber yarns are preferred. In terms of strength and processability with polyurethane elastic yarns, polyamide fibers are preferred. There are no special restrictions on the fiber form and cross-sectional shape of synthetic fibers. However, if you want to make a highly stretchable woven fabric, it is well known The method implements false twist processing and gives crimping first, but in order to reduce the water retention rate, it is better to use a straight yarn with less space between the yarn and the yarn. Moreover, it is more preferable to implement surface smoothing processing by a well-known method to reduce the gap between the yarn and the yarn.

The tear strength specified in JIS L 1096 of the aforementioned swimwear is preferably 8 N or more, more preferably 10 N or more, and still more preferably 12 N or more. This can maintain high tear strength as a swimsuit. In addition, the breaking strength specified in JIS L 1096 of the aforementioned swimwear is preferably 200 kPa or more, more preferably 300 kPa or more, and still more preferably 400 kPa or more. This can maintain a high breaking strength as a swimsuit.

The aforementioned swimsuit is preferably at least one selected from woven fabrics and knitted fabrics. As far as swimwear is concerned, top athletes mostly use woven swimwear, while ordinary people mostly use knitted swimwear. By using it in a swimsuit, the wettability in the water can be suppressed even when swimming, especially when used as a competitive swimsuit, it can suppress the wetting of the swimsuit during competition and also reduce the water resistance. In addition, the buoyancy per 1 g of the swimsuit fabric is preferably 1.70 g or more, more preferably 1.85 g or more, and still more preferably 2.00 g or more. In addition, the buoyancy per 1 g of the swimsuit is preferably 1.45 g or more, more preferably 1.50 g or more. Thereby, it has the advantage of being able to swim at high speed for competitive athletes and the advantage of being able to swim easily for ordinary swimmers. The reason why the buoyancy of the swimsuit is lower than that of the fabric is that the sewing part is wetted by water.

The polyurethane elastic yarn of the present invention is basically composed of polyurethane and the like, and the polyurethane is described first. The polyurethane used in the present invention may be any one as long as it uses polymer diol and diisocyanate as starting materials, and is not particularly limited. In addition, the synthesis method is not particularly limited. That is, for example, it may be a polyurethane urea composed of a polymer diol, a diisocyanate, and a low molecular weight diamine, and it may also be a polyurethane composed of a polymer diol, a diisocyanate, and a low molecular weight diol Amine ester. In addition, it may also be a polyurethaneurea used as a chain extender for a compound having a hydroxyl group and an amino group in the molecule. It is also preferable to use polyfunctional ethylene glycol or isocyanate with trifunctionality or higher within a range that does not affect the effect of the present invention. The polymer diols are preferably polyether-based, polyester-based diols, polycarbonate diols, and the like. Furthermore, from the viewpoint of imparting softness and elongation to the yarn, it is preferable to use a polyether-based diol. As the polyether glycol, for example, polyethylene oxide, polyethylene glycol, polyethylene glycol derivatives, polypropylene glycol, polytetramethylene ether glycol (hereinafter abbreviated as PTMG), tetrahydrofuran are preferably used The copolymer of (THF) and 3-methyltetrahydrofuran is modified PTMG, the copolymer of THF and 2,3-dimethyl THF is modified PTMG, as disclosed in Japanese Patent No. 2615131, etc. Chain polyols, and random copolymers of THF, ethylene oxide and/or propylene oxide arranged irregularly, etc. One or two or more of these polyether glycols may be mixed or copolymerized for use.

In addition, as polyurethane elastic yarns, from the viewpoint of obtaining abrasion resistance or light resistance, it is preferable to use: butylene adipate, polycaprolactone diol, disclosed in Japanese Patent Laid-Open No. 61-26612, etc. Polyester diols such as polyester polyols with side chains, or polycarbonate diols disclosed in Japanese Patent Publication No. 2-289516, etc. In addition, such polymer diols may be used alone, or two or more types may be mixed or copolymerized. The molecular weight of the polymer diol is preferably one having a number average molecular weight of 1,000 or more and 8,000 or less, and more preferably 1,500 or more and 6,000 or less from the viewpoint of obtaining elongation, strength, heat resistance, etc. at the time of yarn production. By using a polyol with a molecular weight in this range, stretch yarns with excellent elongation, strength, elastic recovery, and heat resistance can be easily obtained.

Then, as diisocyanates, aromatics such as diphenylmethane diisocyanate (hereinafter abbreviated as MDI), tolylene diisocyanate, 1,4-diisocyanate benzene, stubbornyl diisocyanate, 2,6-naphthalene diisocyanate, etc. Diisocyanate is particularly suitable for synthesizing polyurethane with high heat resistance or strength. Furthermore, as the alicyclic diisocyanate, for example, methylene bis(cyclohexyl isocyanate), isophorone diisocyanate, methylcyclohexane 2,4-diisocyanate, methylcyclohexane 2,6- Diisocyanate, cyclohexane 1,4-diisocyanate, hexahydromethylene diisocyanate, hexahydromethylene phenyl diisocyanate, octahydro 1,5-naphthalene diisocyanate, etc. Aliphatic diisocyanates can be effectively used especially when inhibiting yellowing of polyurethane elastic yarns. In addition, these diisocyanates may be used alone or in combination of two or more kinds.

It is preferable to use at least one of a low-molecular-weight diamine and a low-molecular-weight diol as a chain extender used when synthesizing polyurethane. Furthermore, it may be a molecule having a hydroxyl group and an amine group in a molecule such as ethanolamine. As preferred low molecular weight diamines, for example, ethylenediamine, 1,2-propanediamine, 1,3-propanediamine, hexamethylenediamine, p-phenylenediamine, p-phenylenediamine, Diamine, p,p'-methylenediphenylamine, 1,3-cyclohexanediamine, hexahydrometaphenylenediamine, 2-methylpentane diamine, bis(4-aminophenyl) ) Phosphine oxides, etc. It is preferable to use one or two or more from these. Particularly preferred is ethylene diamine. By using ethylenediamine, a yarn with excellent elongation, elastic recovery, and heat resistance can be easily obtained. It is also possible to add triamine compounds such as diethylenetriamine that can form a cross-linked structure with the chain extenders to the extent that the effect is not lost.

In addition, as low molecular weight diols, ethylene glycol, 1,3 propylene glycol, 1,4 butanediol, bishydroxyethoxybenzene, bishydroxyethylene terephthalate, 1-methyl-1,2- Representative ones such as ethylene glycol. It is preferable to use one or two or more from these. Especially preferred are ethylene glycol, 1,3-propanediol, and 1,4-butanediol. If these are used, the diol-extended polyurethane has higher heat resistance and can obtain yarns with higher strength.

Furthermore, in the present invention, the molecular weight of polyurethane is preferably in the range of a number average molecular weight of 30,000 or more and 150,000 or less from the viewpoint of obtaining a fiber with high durability or strength. In addition, the molecular weight was measured by GPC and converted by polystyrene.

It is also preferable to use one or more end plugging agents in combination with polyurethane. As the terminal plugging agent, preferably: dimethylamine, diisopropylamine, ethylmethylamine, diethylamine, methylpropylamine, isopropylmethylamine, diisopropylamine, butylmethylamine, isobutylmethylamine, isoamylamine Monoamines such as methylamine, dibutylamine, and dipentylamine, monohydric alcohols such as ethanol, propanol, butanol, isopropanol, allyl alcohol, and cyclopentanol, and monoisocyanates such as phenyl isocyanate.

In the present invention, the polyurethane elastic yarn composed of polyurethane having the basic structure as above contains a cationic high molecular weight compound A with a number average molecular weight of 2000 or more in the range of 0.5 to 10% by mass, and contains inorganic chlorine degradation inhibitors The mass ratio of agent B and A/B satisfies the range of 0.3 to 3, thereby exerting a huge synergistic effect, showing excellent chlorine degradation resistance and water-repellent processability.

The cationic high molecular weight compound used in the present invention is not particularly limited if it is a compound having an amino group in the structure. From the viewpoint of the chlorine degradation resistance and yellowing property of polyurethane elastic yarn, it is particularly preferred that only Those with a tertiary amine group from the first to the tertiary amine group. If the number-average molecular weight of the cationic high-molecular-weight compound is less than 2000, the polyurethane elastic yarn will fall off due to friction with the guide or knitting needle, or it will flow out during processing in the bath such as dyeing, which will cause the The water workability becomes poor, so the number average molecular weight must be 2000 or more. In view of the solubility to polyurethane spinning stock solution, the number average molecular weight is preferably in the range of 2000 to 10000. More preferably, it is in the range of 2000 to 4000.

By containing the above-mentioned cationic high molecular weight compound, the water-repellent processability of polyurethane elastic yarn can be improved. From the viewpoint of fully exerting this effect without adversely affecting the physical properties of the fiber, the cationic high molecular weight compound is preferably contained in excess of 0.5% by mass, 10% by mass or less, and more preferably more than 0.5% by mass relative to the fiber mass. %, 4% by mass or less.

Furthermore, while the polyurethane yarn of the present invention contains the above-mentioned cationic high molecular weight compound, it must also contain an inorganic chlorine deterioration inhibitor. As the inorganic chlorine degradation inhibitor of the present invention, it is preferable to use at least one selected from oxides, carbonates, composite oxides, and solid solutions selected from Zn, Mg, Ca, and AI. From the viewpoint of swimming pool water resistance and impact on the environment _{, hydrotalcites composed of carbonates, namely CaCO 3} , MgCO ₃ , Mg, and Al are particularly preferred.

The content of the inorganic chlorine deterioration inhibitor in the polyurethane elastic yarn of the present invention is preferably in the range of 0.5% by mass or more and 10% by mass from the viewpoint of swimming pool water resistance and stability during manufacture. More preferably, it is 1 mass% or more and 5 mass% or less.

Also, from the viewpoint of having both swimming pool water resistance and water repellency processability, the mass ratio of the cationic high molecular weight compound (A) and the inorganic chlorine deterioration inhibitor (B) in the polyurethane elastic yarn (A)/( B) is in the range of 0.3 to 3, more preferably in the range of 0.5 to 2.

The inorganic chlorine deterioration inhibitor is blended in the spinning solution for spinning. Therefore, from the viewpoint of spinning stability, it is preferably a fine powder with an average particle size of 2 μm or less, and more preferably an average particle size Fine powder below 1 μm. In addition, from the viewpoint of dispersibility, when the average primary particle size is less than 0.01 μm, it is difficult to uniformly mix in the spinning dope due to the increased cohesive force, so the average primary particle size is preferably 0.01 μm or more . The above average particle size is measured by the laser diffraction light scattering method to measure the 50% particle size. As the measuring device, for example, there is a laser diffraction/scattering particle distribution measuring device LA-950S2 manufactured by Horiba Manufacturing Co., Ltd.

In order to finely powder the inorganic chlorine degradation inhibitor, it is preferable to use the following method, that is, the inorganic chlorine degradation inhibitor and N,N-dimethylacetamide (hereinafter abbreviated as DMAc), dimethylformaldehyde Amide (hereinafter abbreviated as DMF), dimethyl sulfide (hereinafter abbreviated as DMSO), N-methylpyrrolidone (hereinafter abbreviated as NMP), etc. or solvents based on these as main components, other additives such as thickening The agent is mixed to prepare a slurry, and it is pulverized by a vertical or horizontal grinder or the like. In addition, it is also preferable to use organic substances such as fatty acids, fatty acid esters, phosphate esters, polyhydric alcohol-based organics, and silane-based organic substances in order to improve the dispersibility of inorganic chlorine degradation inhibitors in the yarn and stabilize spinning. Coupling agent, titanate coupling agent, water glass, fatty acid metal salt or a mixture of these are surface-treated inorganic chlorine degradation inhibitors.

Furthermore, from the viewpoint of improving swimming pool water resistance, it is preferable that the polyurethane elastic yarn of the present invention contains a monohindered phenol compound. As the monohindered phenol compound, a compound containing at least two monohindered hydroxyphenyl groups and having a skeleton selected from diesters and alkylene groups is preferred. Here, it is more desirable that the alkyl group present in the ring position adjacent to the hydroxyl group in the hydroxyphenyl group is a tertiary butyl group, and it is more desirable that the equivalent weight of the hydroxyl group is 600 or less. As the mono-hindered phenol compound, for example, ethylene-1,2-bis(3,3-bis[3-tertiary butyl] in which a mono-hindered hydroxyphenyl group is covalently bonded to a diester skeleton is preferred. -4-hydroxyphenyl]butyrate) (Chemical Formula 1 below).

[化1]

By containing the above-mentioned monohindered phenol compound, the effect of chlorine degradation resistance can be improved. From the viewpoint of fully exerting this effect without adversely affecting the physical properties of the fiber, the single hindered phenol compound preferably contains 0.15 to 4% by mass, and more preferably 0.5 to 3.5% by mass relative to the polyurethane elastic yarn.

As the treatment agent for the polyurethane elastic yarn of the present invention, for example, the elastic fiber is given a specific range of 0.5% by mass or more and 20% by mass or less of silicone in the form of an oil agent. The silicone originally suppresses the tension fluctuation during the unwinding of the polyurethane elastic yarn during the manufacture of the fabric to a small extent. Even for the elastic fiber of fine denier, it is intended to suppress the breakage caused by the unwinding tension fluctuation. This application In the case, it helps to significantly improve the water repellency processability. In addition, the content of silicone in the treatment agent is 0.5-10% by mass based on dry mass, preferably 1-6% by mass. This can improve the affinity with the water repellent treatment agent. For example, when the oil contains silicone, the surface energy of the fabric surface is reduced, and when the water-repellent processing agent is dispersed on the fabric surface, its diffusion performance is significantly improved.

The silicone is preferably polydimethylsiloxane composed of dimethylsiloxane units, and/or modified polysiloxane. The modified polysiloxane is preferably a polydialkylsiloxane composed of a dimethylsiloxane unit and a dialkylsiloxane unit containing an alkyl group having 2 to 4 carbon atoms. Silicone oils such as polysiloxanes composed of base siloxane units and tolyl siloxane units. In addition, from the viewpoint of operability or reduction of the traveling friction with the guide, the viscosity at 25°C is preferably 5×10 ^{-6 to} 50×10 ^-6 m ² /s. The viscosity can be measured by the method specified in JIS K 2283 (Crude Oil and Petroleum Products-Dynamic Viscosity Test Method and Viscosity Index Calculation Method).

When used as a silicone oil agent, it is also preferable to mix and use paraffinic hydrocarbons such as mineral oil, antistatic agents, dispersants, metal soaps, and the like. As the mineral oil paraffinic hydrocarbons, or workability viewpoint of reducing friction on the guide and migration of the class, it is preferably 25 deg.] C the viscosity of ^{5 × 10 - 6 ~50 × 10} - 6 m 2 / s. As the antistatic agent, anionic surfactants such as alkyl sulfate, fatty acid soap, alkyl sulfonate, and alkyl phosphate are preferably used. As a dispersant, it is preferable to use silicone resin, polyether-modified silicone, methanol-modified silicone, carboxy-modified silicone, amine-modified silicone, amide-modified silicone, singly or in the form of a mixture. Carboxyl amide modified silicone, mercapto modified silicone, organic carboxylic acid, etc. As the metal soap, magnesium stearate (hereinafter abbreviated as St-Mg) and calcium stearate are preferred. From the viewpoint of improving handleability or dispersibility, the average particle size is preferably 0.1 to 1.0 μm.

In addition, the silicone oil used in the present invention preferably contains components commonly used in synthetic fiber treatment agents, such as binders, ultraviolet absorbers, antioxidants, preservatives, and wettability enhancers, as necessary. The content of the paraffin-based hydrocarbons such as mineral oil, metal soap, antistatic agent, dispersant, etc. is preferably determined appropriately according to the purpose. Furthermore, it is preferable to blend a stabilizer, a thermal conductivity improver, and a pigment in a range that does not impair the effect of the present invention.

The polyurethane elastic yarn of the present invention may optionally contain various stabilizers or pigments. For example, as a light stabilizer, antioxidant, etc., the following substances can be added and reacted with the polymer to exist. This substance refers to the so-called BHT or "Sumilizer" (registered trademark) GA-80 manufactured by Sumitomo Chemical Industry Co., Ltd. Bi-hindered phenol-based pharmaceuticals represented by Ciba-Geigy, "Tinuvin" (registered trademark) and other benzotriazole-based and benzophenone-based pharmaceuticals manufactured by Ciba-Geigy, and "Sumilizer" P- manufactured by Sumitomo Chemical Industry Co., Ltd. Various hindered amine agents such as 16 phosphorous agents; inorganic pigments such as titanium oxide and carbon black; fluorine resin powder or silicone resin powder based on polyvinylidene fluoride; metals such as magnesium stearate Soap; disinfectant and deodorant containing silver or zinc or these compounds; lubricants such as silicone and mineral oil; various antistatic agents such as barium sulfate, cerium oxide, betaine or phosphoric acid compounds, phosphate ester compounds, etc. In addition, in order to further improve the durability against light and various nitrogen oxides, it is preferable to include HN-150 manufactured by Nippon Hydrazine (Stock), "Hostanox" (registered trademark) SE10 manufactured by Clariant Corporation, etc. Nitric oxide traps, such as thermal oxidation stabilizers such as "Sumilizer" GA-80 manufactured by Sumitomo Chemical Co., Ltd., light stabilizers such as "Sumisorb" (registered trademark) 300#622 manufactured by Sumitomo Chemical Co., Ltd., etc. .

Next, the manufacturing method of the polyurethane elastic yarn of the present invention will be described in detail. First, the manufacturing method of polyurethane may be either a melt polymerization method or a solution polymerization method, or other methods. However, the solution polymerization method is more preferable. In the case of the solution polymerization method, less foreign matter such as gel is generated in the polyurethane, it is easy to spin, and it is easy to obtain a polyurethane elastic yarn with low fineness. Also, of course, in the case of solution polymerization, there is an advantage that the operation of making the solution can be omitted.

And as the polyurethane particularly suitable for the present invention, it can be used: PTMG with a molecular weight of 1500 or more and 6000 or less as a polymer diol, MDI as a diisocyanate, ethylene diamine as a chain extender, 1,2-propanedi Synthesis of at least one of amine, 1,3-propanediamine, and hexamethylenediamine. Polyurethane is obtained, for example, by synthesizing the above-mentioned raw materials in DMAc, DMF, DMSO, NMP, etc. or a solvent containing these as main components. For example, the following method can be used as a particularly suitable method: the so-called one-trigger method in which various raw materials are put into such a solvent, dissolved, and heated to an appropriate temperature to react to form polyurethane; and firstly, the polymer The alcohol and the diisocyanate are melt-reacted, and then the reactant is dissolved in a solvent and reacted with the above-mentioned chain extender to form a polyurethane.

In the case of using a glycol as a chain extender, it is preferable to adjust the melting point of the high temperature side of the polyurethane to a range of 200°C or more and 260°C or less from the viewpoint of obtaining an excellent heat resistance. A representative method can be achieved by controlling the types and ratios of polymer diol, MDI, and glycol. When the molecular weight of the polymer diol is low, by relatively increasing the ratio of MDI, a polyurethane with high temperature and high melting point can be obtained. Similarly, when the molecular weight of the diol is low, by relatively reducing the The ratio of alcohol can obtain polyurethane with high temperature and high melting point. When the molecular weight of the polymer diol is 1800 or more, in order to set the melting point of the high temperature side to 200°C or more, it is preferable to set (MDI mole number)/(Polymer diol mole number)=1.5 or more The ratio is aggregated.

、N-甲基-N'-二甲胺基乙基-哌

、N-(2-二甲胺基乙基)嗎福林、1-甲咪唑、1,2-二甲咪唑、N,N-二甲胺基乙醇、N,N,N'-三甲胺基乙基乙醇胺、N-甲基-N'-(2-羥乙基)哌

、2,4,6-三(二甲胺甲基)酚、N,N-二甲胺基己醇、三乙醇胺等。 又，作為有機金屬觸媒，可列舉辛酸錫、二月桂酸二丁基錫、辛酸二丁基鉛等。 Furthermore, when synthesizing the polyurethane, it is also preferable to mix and use one or more types of amine catalysts or organic metal catalysts. Examples of amine catalysts include N,N-dimethylcyclohexylamine, N,N-dimethylbenzylamine, triethylamine, N-methylmorpholine, and N-ethylmorpholine , N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethyl-1,3-propanediamine, N,N,N',N '-Tetramethylhexamethylenediamine, bis-2-dimethylamino ethyl ether, N,N,N',N',N'-pentamethylethylenetriamine, tetramethylguanidine, triethylene Diamine, N,N'-dimethylpiperidine

, N-methyl-N'-dimethylaminoethyl-piper

, N-(2-dimethylaminoethyl) mopholin, 1-methimidazole, 1,2-dimethylimidazole, N,N-dimethylaminoethanol, N,N,N'-trimethylamino Ethylethanolamine, N-methyl-N'-(2-hydroxyethyl)piper

, 2,4,6-tris(dimethylaminomethyl)phenol, N,N-dimethylaminohexanol, triethanolamine, etc. Moreover, as an organometallic catalyst, tin octoate, dibutyl tin dilaurate, dibutyl lead octoate, etc. are mentioned.

The polyurethane concentration in the polyurethane solution thus obtained is generally preferably in the range of 30% by mass or more and 80% by mass or less.

In the present invention, in order to improve durability against chlorine in swimming pool water and water repellency processability, the polyurethane solution may contain a cationic high molecular weight compound with a number average molecular weight of 2000 or more and an inorganic chlorine degradation inhibitor. As a method of containing a cationic high molecular weight compound in the spinning dope, it may be mixed with the spinning dope alone, or may be mixed with an inorganic chlorine deterioration inhibitor in advance. As a method for uniformly dispersing the polyurethane spinning stock solution before spinning, the following method is preferred, that is, N,N-dimethylformamide, N,N-dimethylacetamide, etc. are used as the solvent For the polyurethane spinning stock solution, the cationic high molecular weight compound and inorganic chlorine deterioration inhibitor are added, and the mixture is stirred and mixed to make it uniformly dispersed. Specifically, it is preferable to dissolve or disperse the cationic high molecular weight compound and the inorganic chlorine degradation inhibitor in a solvent such as N,N-dimethylformamide, N,N-dimethylacetamide, and the like in advance. The solution and dispersion are mixed with polyurethane spinning stock solution. Here, from the viewpoint of uniformly adding to the polyurethane solution, it is preferable to use the same solvent as the polyurethane solution as the solvent for the added cationic high molecular weight compound and the inorganic chlorine deterioration inhibitor. In addition, a cationic high-molecular-weight compound and an inorganic chlorine deterioration inhibitor, the above-mentioned chemicals such as lightfast agents and antioxidants, or pigments, etc. may be added at the same time. At this time, as a method of adding a cationic high molecular weight compound and an inorganic chlorine deterioration inhibitor to the polyurethane solution, any method can be adopted. As a representative method, various methods such as a method using a static mixer, a method using a stirring, a method using a homomixer, and a method using a twin-screw extruder can be used.

Furthermore, in order to improve the durability against chlorine in swimming pool water, it is preferable to make the polyurethane elastic yarn contain a single hindered phenol compound in the range of 0.15% by mass to 4.0% by mass, and the single hindered phenol compound has at least one single hindered phenol compound. The hydroxyphenyl group has a molecular weight of 300 or more. As a method for making the spinning dope to contain a monohindered phenol compound, any method may be adopted, and it may be mixed with the spinning dope alone, or may be mixed with the above-mentioned solution or dispersion in advance.

The spinning stock solution constituted as above is subjected to, for example, dry spinning, wet spinning, or melt spinning, and is wound up, whereby the polyurethane yarn of the present invention can be obtained. Among them, from the viewpoint of stably spinning at all deniers from fine to thick, dry spinning is preferred. The fineness, cross-sectional shape, etc. of the polyurethane elastic yarn of the present invention are not particularly limited. For example, the cross-sectional shape of the yarn can be round or flat. In addition, the dry spinning method is also not particularly limited, and spinning can be performed by appropriately selecting the spinning conditions corresponding to the desired characteristics or spinning equipment. Furthermore, from the viewpoint of improving the strength of the polyurethane elastic yarn obtained, the spinning speed is preferably 250 m/min or more.

The knitted fabric containing polyurethane elastic yarn can be any knitted fabric of circular knitting, weft knitting, warp knitting (including Tricot warp knitting, Russell warp knitting), and the structure can be napped knitting, plain knitting, weft jersey knitting, raised strip Knitting, double rib (double-sided) knitting, rib knitting, double reverse knitting, warp plain knitting, double warp plain knitting, warp knitting, warp knitting, inverse warp knitting, warp knitting, satin knitting, double Any knitting organization such as satin knitting, crochet knitting, interlining knitting, and knitted fabrics combined with these.

The woven fabric composed of polyurethane elastic yarn and other fibers can be woven by the usual method. As a woven fabric weaves, including: plain weave, twill weave, satin weave, plain weave, twill weave, satin weave, fancy weave, embossed weave, single-layer weave, double-layer weave, multi-layer weave, warp Napped weave, weft napped weave, leno weave, or a combination of these woven fabrics, etc. It can be any kind of woven fabric in which polyurethane yarn is only used for unidirectional stretching of warp yarn or weft yarn, and used for bidirectional stretching of both warp and weft.

The fabric composed of polyurethane elastic yarn and other fibers is refined, relaxed and shaped under normal conditions. The dyeing of fabrics is usually carried out with dyes and conditions suitable for other fibers with high mixing rate of fabrics. In addition to disperse dyes, acid dyes, and gold-containing dyes, well-known dyes can also be used for dyes, and fixation treatment, antibacterial treatment, and softening treatment to fix the dyes can also be carried out if necessary.

Next, the water-repellent processing method of the present invention will be described. The water-repellent processing method of the present invention is preferably imparted by dry heat treatment. As dry heat treatment, a method of applying a treatment liquid containing a water-repellent agent to a swimsuit using a device such as a pressure suction machine, followed by drying and heat treatment. As a device for applying a treatment liquid containing a water-repellent agent to a swimsuit, a device that can uniformly apply a liquid to a swimsuit is preferable, and it is suitable to use an ordinary suction machine as a liquid applying device. It can also be provided by a bubble processing machine, or a printing method, an inkjet method, a spray method, a coating method, and the like. The drying temperature is preferably 80°C to 150°C. The treatment time is preferably 15 seconds to 5 minutes, more preferably 100 to 140°C for 30 seconds to 3 minutes. The heat treatment temperature after drying is preferably 80 to 200°C. The treatment time is preferably 15 seconds to 8 minutes, more preferably 130 to 190°C and 30 seconds to 5 minutes. When the treatment temperature is low, the reaction is not sufficient and the water repellency decreases.

Use the following diagram to illustrate. In the following figures, the same symbols represent the same objects. Fig. 1 is a schematic plan view of an extended fabric 1 in which a plain weave part 2 and a weft double weave part 3 are alternately repeated in an embodiment of the present invention. The plain weave part 2 is formed by crossing the warp yarn 4 and the weft yarn 5 to form a woven fabric. The weft double woven part 3 is formed by intersecting the warp yarns 4 and the weft yarns 6a and 6b to form a woven fabric. The weft 6a is arranged in front and the weft 6b is arranged on the back side. Therefore, the thickness of the weft double woven part 3 is larger than that of the plain weave part 2. In addition, since there are more stretch yarns in the weft double woven part 3 than in the plain woven part 2 and reinforced, the stretchability becomes higher and it becomes easy to wear. Furthermore, since the plain weave part 2 is a concave part and the weft double-weave part 3 is a convex part, the concavities and convexities are arranged in one direction in a striped shape as a whole. Therefore, for example, in the case of making a swimsuit, if the above-mentioned stripe shape is used for the position along the height direction of the body, the surface frictional resistance with the water flow can be reduced.

2 is a schematic plan view of a stretched fabric 7 in which a plain weave portion 8 and a double-layer weave portion 9 are alternately repeated in another embodiment of the present invention. In the plain weave part 8, the warp yarn 10 and the weft yarn 11 intersect to form a woven fabric. In the warp double woven part 9, the warp yarns 12a, 12b and the weft 11 intersect to form a woven fabric. The warp yarn 12a is arranged in front, and the warp yarn 12b is arranged on the inner side. Therefore, the thickness of the warp double woven part 9 is thicker than that of the plain weave part 8. .

Fig. 3A is a schematic plan view of the stretch fabric 1 according to an embodiment of the present invention, and Fig. 3B is a cross-sectional view thereof. The plain weave part 2 is a concave part, and the weft double-weave part 3 is a convex part. When viewed from a plan view, the concavities and convexities are arranged in the same direction and are striped.

Fig. 4 is a schematic plan view of a single-layer covering yarn 13 used in the stretch fabric. The core yarn 14 is composed of stretch yarns such as polyurethane, and one covering yarn 15 is composed of processed yarns such as nylon. Fig. 4B is a schematic plan view of a double-layer covered yarn 16 of another embodiment. The core yarn 17 is composed of elastic yarns such as polyurethane, and the covering yarn (upper yarn) 19 and the covering yarn (bottom yarn) 18 are composed of processed yarns such as nylon.

Fig. 5 is a schematic front view of a sports swimsuit 20 using the stretch fabric, and Fig. 6 is a rear view thereof. The striped part 21 from the abdomen to the upper part of the sports swimsuit 20 is a woven fabric with a plain weave part and a double-layer weave part alternately repeated as shown in FIGS. 1 and 3. The flat part 22 from the thigh of the front of the sports swimsuit 20 to the waist and from the shoulder to the back of the waistband is a flat fabric. The striped portion 21 and the flat portion 22 are sewn together. The back of the sports swimsuit 20 is entirely set as a striped part 21 (a woven fabric with a plain weave part and a double weave part alternately repeated). The striped portion 21 is preferably arranged along the height direction of the human body. Fig. 7 is a schematic front view of a male competitive swimsuit 23 using the stretch fabric. The striped part 24 is a woven fabric in which a plain weave part and a double-layer weave part alternately repeat. The flat part 25 is a woven fabric of plain weave. The striped portion 24 is preferably arranged along the height direction of the human body.

Competitive swimwear is preferably made in such a way that it is about 20% to 40% smaller than the human body. If made in this way, it can fit for people to wear. [Example]

Examples are used to explain the present invention in more detail. In addition, the present invention is not limitedly interpreted by the following examples. In addition, in the following examples, when the weight ratio is simply expressed as %, it means mass %.

Hereinafter, various characteristics of woven fabrics are measured by the following methods. ＜Element mass concentration＞ Disassemble the swimsuit, use the polyurethane elastic yarn on the surface or the polyurethane elastic fiber taken out after defibrillation, and measure the SEM-EDX under the following conditions. Calculate the F/C ratio based on the obtained element mass concentration. The measuring machine uses SEM (S-3400N manufactured by Hitachi) and EDX detector (EMAX x-act manufactured by Horiba). (Measurement conditions) Accelerating voltage: 5 kV Resolution: 1024×768 Probe current: 50 mA Action time: 120 seconds Vacuum degree: 30 Pa Processing time: mode: 4 WD: 10 mm Spectral range: 0-20 keV Magnification: 2000 times Number of channels: 2 K ＜Water repellency＞ Use the method specified in JIS L 1092 "Test Method for Waterproofing of Fibrous Products" (1998) to evaluate by spray method to determine the level. ＜Water retention rate＞ Draw a circle with a diameter of 11.2 cm in the center of a swimsuit that is cut to 20 cm in length and 20 cm in width, expand it by expanding the area of the circle by 80%, and install it for the water repellency test (JIS L 1092). After the spray test (JIS L 1092) is implemented, the test piece holding frame of) is removed from the holding frame and air-dried in an environment of 20°C×53%RH. Prepare 10 pieces of the swimsuit, and set the measured weight of each piece as the "weight before treatment". Pour 30 L of water into the washing machine (JIS C 9606) (water temperature 25~29°C), put 10 pieces of the above swimsuits in the water and rotate them for a predetermined time (10 minutes, 60 minutes, 120 minutes) under the "strong washing conditions" After that, take them out one by one from the water, and wait for 10 seconds at a tilt of 15 degrees in the unfolded state to allow the water droplets attached to the swimsuit to fall down, and use the measured weight as the "processed weight" by the following formula Determine the water retention rate. Water retention rate (%)=((weight after treatment−weight before treatment)/weight before treatment)×100 ＜Buoyancy test＞ First, measure the weight of the sample in the air (W1). Then, use the buoyancy measurement method shown in Figure 8 to measure the weight in water (W2). The buoyancy test device 30 injects water 32 into the container 31, puts the sample 38 therein, and fixes the test device 33 on it. The test device is to hold a weight scale between the support 34 and the plate 36, install the support rod 35 and the wire mesh 37, as shown in Figure 8, put the wire mesh 37 into the water, and measure the weight of the sample 38 in the water ( W2). The calculation of buoyancy is based on W1−W2. In the case of fabric samples, measure 5 samples with a length of 3 cm and a width of 4 cm, and calculate the average value. Determine the weight of the fabric sample when it is dry. ＜Tear strength＞ The evaluation is carried out by the pendulum method specified in JIS L 1096 "Testing Methods for Woven Fabrics and Knitted Fabrics" (1999). <Bursting strength> The evaluation was carried out by the Mulun method specified in JIS L 1096 "Testing Methods for Woven Fabrics and Knitted Fabrics" (1999). ＜Elongation＞ The measurement is carried out in accordance with the method A shear strip method specified in JIS L 1096 "Testing Methods for Woven Fabrics and Knitted Fabrics" (1999). The width of the test piece is set to 5 cm, and the clamping distance is set to 20 cm. The initial initial load is set to be equivalent to the load of gravity applied to the length of 1 m by the width of the test piece. The stretching speed is set to 20 cm/min. Measure the elongation (%) under a load of 17.7 N (1.8 kg). Elongation represents stretchability. ＜Stress at 30% elongation＞ Measure the elongation in the warp and weft directions when measuring the stress (N) at 30% elongation, converted to every 1 cm, expressed in N/cm. The stress at 30% extension is the benchmark for evaluating the compression (wearing pressure) function.

-2-基]-5-(辛氧基)酚（Cytec公司製造之「Cyasorb」（註冊商標）1164）進行混合，製備DMAc溶液（濃度35質量%），將此作為添加劑溶液（35質量%）。 以98質量%、2質量%之比率將聚胺酯脲溶液與添加劑溶液混合，形成聚合物溶液（X1）。 作為陽離子性高分子量化合物，藉由第三丁基二乙醇胺與亞甲基-雙-(4-環己基異氰酸酯)之反應，生成數量平均分子量2600之陽離子性高分子量化合物。將所生成之陽離子性高分子量化合物溶解於DMAc，製備濃度35質量%之溶液（A1）。 作為氯劣化抑制劑，使用白石工業（股）製造之碳酸鈣膠質碳酸鈣A（CaCO ₃，平均一次粒徑：1.0 μm）製備35質量%DMAc分散液。該製備係使用水平研磨機WILLY A.BACHOFEN公司製造之DYNO-MIL KDL，填充85%氧化鋯珠，於80 g/分鐘之流速條件下使其均勻地微分散，形成合成碳酸鹽之DMAc分散液B1（35質量%）。 進而，作為單受阻酚化合物，將伸乙基-1,2-雙(3,3-雙[3-第三丁基-4-羥苯基]丁酸酯（科萊恩公司（Clariant Corporation）製造之「Hostanox」（註冊商標）O3）溶解於DMAc，製備濃度35質量%之溶液（C1）。 將聚合物溶液X1、A1、B1、C1分別以97質量%、1質量%、3質量%、1質量之比率混合，製備紡紗原液Y1。藉由將該紡紗原液Y1以580 m/分鐘之捲取速度進行乾式紡紗，製造聚胺酯彈性紗（78分德士）（Z1），塗佈為處理劑之矽酮油劑並進行捲取。再者，矽酮油劑係以乾燥重量計賦予6%之包含矽酮（聚二甲基矽氧烷）96%、St-Mg3%、分散劑1%之處理劑（油劑）。 以尼龍66生紗對如上述操作所得之聚胺酯彈性紗進行單層被覆。尼龍66生紗為33分德士、10絲。如此獲得紗A。 （聚胺酯彈性紗B之製作） 以55分德士製作聚胺酯彈性紗，除此之外，與紗A同樣地進行製作，獲得紗B。 （聚胺酯彈性紗C之製作） 以44分德士製作聚胺酯彈性紗，並以33分德士、10絲之尼龍66生紗進行被覆，除此之外，與紗A同樣地進行製作，獲得紗C。 （聚胺酯彈性紗D之製作） 以44分德士製作聚胺酯彈性紗，並以22分德士、24絲之尼龍66生紗進行被覆，除此之外，與紗A同樣地進行製作，獲得紗D。 （聚胺酯彈性紗E之製作） 以33分德士製作聚胺酯彈性紗，並以22分德士、24絲之尼龍66生紗進行被覆，除此之外，與紗A同樣地進行製作，獲得紗E。 （聚胺酯彈性紗F之製作） 以33分德士、10絲之尼龍66生紗對78分德士之聚胺酯彈性纖維（Toray Opelontex公司製造之176E型）進行被覆，獲得紗F。 （聚胺酯彈性紗G之製作） 以33分德士、10絲之尼龍66生紗對55分德士之聚胺酯彈性纖維（Toray Opelontex公司製造之254E型）進行被覆，獲得紗G。 （聚胺酯彈性紗H之製作） 以33分德士、10絲之尼龍66生紗對44分德士之聚胺酯彈性纖維（Toray Opelontex公司製造之254T型）進行被覆，獲得紗H。 （聚胺酯彈性紗I之製作） 以22分德士、24絲之尼龍66生紗對44分德士之聚胺酯彈性纖維（Toray Opelontex公司製造之254T型）進行被覆，獲得紗I。 （聚胺酯彈性紗J之製作） 以22分德士、24絲之尼龍66生紗對33分德士之聚胺酯彈性纖維（Toray Opelontex公司製造之254E型）進行被覆，獲得紗J。 (Production of Polyurethane Elastic Yarn A) Put PTMG and MDI with a number average molecular weight of 1800 into the container at a molar ratio of MDI/PTMG=1.58/1, react at 90°C, and dissolve the resulting reaction product in N,N-Dimethylacetamide (DMAc). Then, a DMAc solution containing ethylenediamine and diethylamine was added to the solution in which the above-mentioned reactants were dissolved to prepare a polyurethane urea solution with a solid content of 35% by mass in the polymer. Furthermore, a condensation polymer of p-cresol and divinylbenzene (“Metacrol” (registered trademark) 2390 manufactured by DuPont) as an antioxidant, and 2 as an ultraviolet absorber were combined in a ratio of 3 to 2 (mass ratio). -[4,6-bis(2,4-xylyl)-1,3,5-tri

-2-yl]-5-(octyloxy)phenol ("Cyasorb" (registered trademark) 1164 manufactured by Cytec) was mixed to prepare a DMAc solution (concentration 35% by mass), which was used as an additive solution (35% by mass) ). The polyurethane urea solution and the additive solution were mixed at a ratio of 98% by mass to 2% by mass to form a polymer solution (X1). As a cationic high molecular weight compound, the reaction of tert-butyldiethanolamine and methylene-bis-(4-cyclohexyl isocyanate) produces a cationic high molecular weight compound with a number average molecular weight of 2,600. The generated cationic high molecular weight compound was dissolved in DMAc to prepare a solution (A1) with a concentration of 35% by mass. As a chlorine deterioration inhibitor, calcium carbonate colloidal calcium carbonate A (CaCO ₃ , average primary particle size: 1.0 μm) manufactured by Shiraishi Industry Co., Ltd. was used to prepare a 35% by mass DMAc dispersion. This preparation uses the horizontal grinder WILLY A. BACHOFEN DYNO-MIL KDL manufactured by the company, filled with 85% zirconia beads, and uniformly microdisperses them at a flow rate of 80 g/min to form a synthetic carbonate DMAc dispersion. B1 (35 mass%). Furthermore, as a monohindered phenol compound, ethylene-1,2-bis(3,3-bis[3-tertiarybutyl-4-hydroxyphenyl]butyrate (manufactured by Clariant Corporation) "Hostanox" (registered trademark) O3) was dissolved in DMAc to prepare a solution (C1) with a concentration of 35% by mass. The polymer solutions X1, A1, B1, and C1 were respectively 97% by mass, 1% by mass, 3% by mass, 1 mass ratio is mixed to prepare spinning dope Y1. By dry spinning the spinning dope Y1 at a winding speed of 580 m/min, polyurethane elastic yarn (78 cents) (Z1) is produced and coated It is the silicone oil of the treatment agent and is coiled. Furthermore, the silicone oil is given 6% by dry weight and contains 96% of silicone (polydimethylsiloxane), 3% of St-Mg, dispersion 1% of the treatment agent (oil agent). The polyurethane elastic yarn obtained by the above operation is single-layered with nylon 66 raw yarn. The nylon 66 raw yarn is 33 cents and 10 filaments. In this way, yarn A is obtained. (Polyurethane) Production of elastic yarn B) A polyurethane elastic yarn was produced with 55 cents of taxi, except that it was produced in the same manner as yarn A to obtain yarn B. (Production of polyurethane elastic yarn C) was produced with 44 cents of taxi , And covered with nylon 66 raw yarn of 33 cents of taxi and 10 filaments, except that it was produced in the same manner as yarn A to obtain yarn C. (Production of polyurethane elastic yarn D) Polyurethane was produced with 44 cents of taxi The elastic yarn was covered with nylon 66 raw yarn of 22 cents of taxis and 24 filaments, except that it was produced in the same manner as yarn A to obtain yarn D. (Production of polyurethane elastic yarn E) 33 cents of taxis A polyurethane elastic yarn was produced, and covered with a nylon 66 raw yarn of 22 cents and 24 filaments, except that it was produced in the same manner as yarn A to obtain yarn E. (Production of polyurethane elastic yarn F) 33 minutes Tex, 10 yarns of nylon 66 raw yarn is coated with 78 cents of Tex of polyurethane elastic fiber (type 176E manufactured by Toray Opelontex) to obtain yarn F. (Production of polyurethane elastic yarn G) At 33 cents of taxi, 10 The raw nylon 66 yarn of silk is coated with polyurethane elastic fiber (type 254E manufactured by Toray Opelontex) of 55 cents to obtain yarn G. (Production of polyurethane elastic yarn H) With 33 cents of taxis and 10 silk of nylon 66 The raw yarn is coated with polyurethane elastic fiber (type 254T manufactured by Toray Opelontex) of 44 cents of taxis to obtain yarn H. (Production of polyurethane elastic yarn I) With 22 cents of taxis and 24 filaments of nylon 66 raw yarn to 44 Polyurethane elastic fiber (type 254T manufactured by Toray Opelontex) was covered by a polyester elastic fiber (Toray Opelontex) to obtain yarn I. (Production of polyurethane elastic yarn J) Nylon 66 raw yarn with 22 cents of taxi and 24 silk was used for 33 cents of taxi. Polyurethane elastic fiber (T 254E type manufactured by oray Opelontex) was coated to obtain yarn J.

(Example 1) Using yarn A as the warp yarn, yarn B as the weft yarn, and yarn C as the weft bottom yarn, the extended fabric 1 in which the plain weave part 2 and the weft double weave part 3 alternately repeated as shown in Fig. 1 were woven. The resulting woven fabric was 66% by mass nylon and 34% by mass polyurethane. The woven fabric is refined, shaped in the middle, dyed and dried according to the usual methods. The resulting woven fabric was immersed in the following water-repellent formula, twisted at a pressure absorption rate of 50%, and then dried in a pin tenter set at 130°C. Then, a dry heat treatment was performed for 1 minute in a pin tenter set at a temperature of 170° C. to obtain the processed woven fabric of Example 1. The obtained processed fabric exhibits high water repellency, and a woven fabric exhibiting excellent water repellency with low water retention rate is obtained. ▪FX-ML ((stock) fluorine-based water repellent manufactured by Keisei Kasei): 100 g/L ▪Beckamine M-3 (melamine resin manufactured by Dainippon Ink Chemical Industry Co., Ltd.): 3 g/L ▪BeckamineACX( Catalyst manufactured by Dainippon Ink Chemical Industry Co., Ltd.): 2 g/L ▪Super Fresh JB7200 (water dispersible polyfunctional isocyanate crosslinking agent manufactured by Keisei Kasei Co., Ltd.): 5 g/L Smooth processing is applied to the surface of the woven fabric. The smoothing process is a process of heating and pressing between a pair of rolls. The roll temperature is set to 220°C, the line pressure is set to 5500 kgf, and the roll speed is set to about 6-10 m/min. The longitudinal density of the obtained woven fabric is 186 threads/2.54 cm, the horizontal density of the plain weave part: 179 threads/2.54 cm, the transverse density of the weft double woven part: 209 threads/2.54 cm, and the mass per unit area is 142 g/ m ² , the width of the plain weave part 2 is 1.70 mm, and the width of the weft double weave part 3 is 1.70 mm. The elongation of the woven fabric is 52.9% in the warp direction and 35.2% in the weft direction. The stress at 30% elongation is 1.72 N/cm in the warp direction and 2.96 N/cm in the weft direction. The resulting processed fabric has high stretchability and good adhesion to human skin, and a woven fabric exhibiting high water repellency and excellent water repellency with low water retention rate is obtained.

(Example 2) The yarn D was used as the warp yarn and the yarn E was used as the weft yarn to produce a plain fabric. Weave a woven fabric of 70% nylon and 30% polyurethane, and perform dyeing and water repellent processing in the same manner as in Example 1. The vertical density is 205/2.54 cm, and the horizontal density is 200/2.54 cm. The mass per unit area is 95 g/m ² woven fabric. The obtained processed fabric has high elasticity and good adhesion to human skin, and a swimsuit fabric with excellent water repellency exhibiting high water repellency and low water retention rate can be obtained. The results are summarized in Table 1.

(Comparative example 1) Using yarn F as the warp yarn, yarn G as the weft yarn, and yarn H as the weft bottom yarn, weaving a woven fabric of 66% nylon and 34% polyurethane, except that the same procedure as in Example 1 was carried out. Dyeing processing, water-repellent processing, and surface smoothing processing were performed to obtain a processed woven fabric of Comparative Example 1. The longitudinal density of the obtained woven fabric is 184 threads/2.54 cm, the horizontal density of the plain weave part: 178 threads/2.54 cm, the transverse density of the weft double woven part: 208 threads/2.54 cm, and the mass per unit area is 139 g/ m ² , the width of the plain weave part 2 is 1.70 mm, and the width of the weft double weave part 3 is 1.70 mm. Although the obtained processed fabric showed a high water repellency, the water retention rate was high, which was not enough. The above results are summarized in Table 1.

(Comparative Example 2) Using yarn I as the warp yarn and yarn J as the weft yarn, weaving a woven fabric of 70% nylon and 30% polyurethane, and performing dyeing and water repellent processing in the same manner as in Example 2 to obtain The processed cloth woven fabric of Comparative Example 2. The longitudinal density of the obtained woven fabric was 215 pieces/2.54 cm, the transverse density: 210 pieces/2.54 cm, and the mass per unit area was 116 g/m ² . Although the obtained processed fabric showed a high water repellency, the water retention rate was high, which was not enough. The above results are summarized in Table 1.

[Table 1] Example 1 Example 2 Comparative example 1 Comparative example 2 Mass (g/m ² ) 142 95 139 116 Tearing strength (N) vertical 18.4 19.0 19.8* 14.9* Weft 18.2 16.4 19.9* 13.0* Bursting strength (kPa) 482 490 624 444 SEM-EDX analysis value (F/C ratio) 0.073 0.040 0.028 0.021 Elongation(%) vertical 52.9 66.8 54.1 65.1 Weft 35.2 42.0 36.8 50.1 Stress at 30% elongation (N/cm) vertical 1.72 0.98 1.38 1.08 Weft 2.96 1.96 2.70 1.71 Water repellency (level) 5 5 5 5 Water retention rate (%) 10 minutes later 4.5 6.2 8.5 9.3 After 60 minutes 5.8 16.3 31.4 34.3 120 minutes later 10.0 27.8 53.3 51.2 Buoyancy test Air weight W1 (g) A 0.151 0.113 0.160 0.133 Weight in water W2 (g) -0.107 -0.134 -0.082 -0.076 Buoyancy W1−W2 (g) B 0.258 0.247 0.242 0.209 Buoyancy of fabric sample per 1 g (g) B/A 1.71 2.19 1.51 1.57 *Tear strength: residual

As shown in Table 1, it can be confirmed that the swimsuit fabrics of Examples 1 and 2 have high water repellency, low water retention, and high buoyancy.

(Example 3) The woven fabric of Example 1 and the woven fabric of Example 2 were used to sew the competitive male swimsuit shown in FIG. 7. The striped part 24 of the woven fabric of Example 1 is a woven fabric in which a plain weave part and a double-weave part are alternately repeated, and the striped part 24 is arranged along the height direction of the human body. The woven fabric of the plain weave of Example 2 is the flat part 25.

(Comparative example 3) The woven fabric of Comparative Example 1 and the woven fabric of plain weave of Comparative Example 2 were used to sew the competitive male swimwear shown in FIG. 7. The above results are summarized in Table 2.

[Table 2] Example 3 Comparative example 3 Buoyancy test Air weight W1 (g) A 105.8 109.8 Weight in water W2 (g) -56.0 -46.5 Buoyancy W1−W2 (g) B 161.8 156.3 Buoyancy per 1 g of swimsuit (g) B/A 1.53 1.42

As shown in Table 2, it can be confirmed that the swimsuit of Example 3 has high buoyancy. [Industrial availability]

The swimsuit containing polyurethane elastic yarn of the present invention has high water repellency, low water retention rate, and high buoyancy, so it is suitable for competitive athletes and ordinary swimmers.

1, 7: Stretch fabric 2, 8: Plain weave part 3: Weft double woven part 4, 10, 12a, 12b: warp 5, 6a, 6b, 11: weft 9: Warp double woven part 13: Single layer covered yarn 14, 17: core yarn 15, 18, 19: covered yarn 16: Double coated yarn 20: Women's swimwear 21, 24: Striped part 22, 25: flat part 23: Men's swimwear 30: Buoyancy test device 31: Container 32: water 33: weight meter 34: Support 35: support rod 36: Board 37: metal wire mesh 38: Specimen

[Fig. 1] It is a schematic plan view of a woven fabric used in a swimsuit according to an embodiment of the present invention, which is an extended fabric with a plain weave part and a weft double weave part alternately repeated. [Fig. 2] It is a schematic plan view of a woven fabric used in a swimsuit according to another embodiment of the present invention, which is a stretched fabric with a plain weave part and a double weave part alternately repeated. [Fig. 3A] is a schematic plan view of the stretch fabric, and Fig. 3B is a cross-sectional view thereof. [Fig. 4A] is a schematic plan view of the covering yarn used in the stretch fabric, and Fig. 4B is a schematic plan view of the covering yarn of another embodiment. [Figure 5] A schematic front view of a swimsuit using the stretch fabric. [Figure 6] A schematic rear view of a swimsuit using the stretch fabric. [Fig. 7A] A schematic front view of a male swimsuit using the stretch fabric, and Fig. 7B is a rear view thereof. [Fig. 8] A schematic explanatory diagram showing a method of measuring the buoyancy of a swimsuit using the stretch fabric.

23: Men's swimwear 24: Striped part 25: flat part

Claims (12)

A swimsuit containing polyurethane elastic yarn, characterized in that: The polyurethane elastic yarn contains a cationic high molecular weight compound A with a number average molecular weight of 2000 or more in the range of 0.5 to 10% by mass, and contains an inorganic chlorine degradation inhibitor B, the cationic high molecular weight compound A/the inorganic chlorine degradation The mass ratio of inhibitor B satisfies the range of 0.3~3, and the polyurethane elastic yarn is given a silicone oil, The swimsuit fabric is processed by water repellent. For example, the swimsuit of claim 1, which contains polyurethane elastic yarn. In the element mass concentration measured by scanning electron microscope-energy dispersive X-ray spectrometer (SEM-EDX) on the polyurethane elastic yarn, fluorine (F)/carbon ( C) The ratio is 0.030 or more. For example, the swimsuit of claim 1 or 2, which contains 5 to 70% by mass of polyurethane elastic yarn. Such as the swimsuit of claim 1 or 2, wherein the water repellency of the swimsuit fabric is 4 or higher in the spray test specified in JIS L 1092. Such as the swimsuit of claim 1 or 2, wherein the water retention rate of the swimsuit fabric after 60 minutes is less than 50% of the quality of the swimsuit. Such as the swimsuit of claim 1 or 2, wherein the polyurethane elastic yarn is covered with other synthetic fibers. The swimsuit of claim 1 or 2, wherein the swimsuit fabric comprises polyamide-based or polyester-based fiber yarn. Such as the swimsuit of claim 1 or 2, wherein the tear strength of the swimsuit fabric specified in JIS L 1096 is 8 N or more. Such as the swimsuit of claim 1 or 2, wherein the rupture strength of the swimsuit fabric specified in JIS L 1096 is 200 kPa or more. The swimsuit of claim 1 or 2, wherein the swimsuit fabric is selected from at least one of woven fabrics and knitted fabrics. Such as the swimsuit of claim 1 or 2, wherein the buoyancy of the swimsuit fabric per 1 g is 1.70 g or more. Such as the swimsuit of claim 1 or 2, wherein the buoyancy per 1 g of the swimsuit is 1.45 g or more.

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