JP2003129352A - Stretchable polyamide fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stretchable polyamide fabric with high flexibility, manifesting flexible properties in low stress, and having excellent liquid water absorbing and moisture-absorbing/releasing properties free from stuffy feeling and sticky feeling in wearing. SOLUTION: This fabric is a double structured fabric having concavo-convex on reverse face and the warp is obtained by twisting 3,000-15,000 count of twists to a side-by-side type or the like latently crimping polyamide filament which comprises two kind of polyamides having different viscosities, and the weft of the reverse face comprises a moisture-absorbing/releasing synthetic fiber, the fabric has >=20% of elongation rate under 4.9 N/3 cm stress and <=2% of ratio of elongation rate under stress of 14.7 N/3 cm and 4.9 N/3 cm and >=80% of elongation recovery rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyamide woven fabric which is flexible and highly stretchable, and which has excellent water absorption and moisture absorption / desorption properties and is suitable as a material for sports clothing.

[0002]

2. Description of the Related Art Conventionally, various methods have been adopted for imparting excellent stretchability to a woven fabric. For example, there is a method of using a polyurethane-based fiber having excellent stretchability as a yarn constituting a woven fabric. However, as a property peculiar to this polyurethane, there is a drawback that the texture is hard and therefore the texture of the woven fabric is lowered, or the drape property of the woven fabric is reduced. In order to avoid this drawback, polyurethane fibers are covered with polyamide fibers and used as covering yarns. However, when the covering yarn is used, a sophisticated technique is required for tension control during weaving, and there is a risk of stretch unevenness and deterioration of quality of the woven fabric, and there is a problem in terms of cost.

Further, it is also practiced to impart stretchability to a woven fabric by using a false twisted yarn as a yarn constituting the woven fabric. The false twisted yarn inherently has a torque due to twisting and untwisting, and this torque imparts elasticity to the yarn. However, this torque contributes to the stretchability of the woven fabric and, at the same time, causes the appearance of wrinkles on the woven fabric surface, which tends to be a woven fabric defect. There is a problem that the elasticity is impaired if the processing step is changed to eliminate the grain.

Further, there has been attempted a method of obtaining a stretchable woven fabric by using a yarn composed of crimpable fibers without using polyurethane fibers or false twisted yarns. For example, many methods have been proposed in which a polyester fiber having a latent crimping property is twisted to woven a woven fabric, and the woven fabric is subjected to heat treatment to develop crimps. When such a latently crimpable polyester fiber is twisted and used, some stretchability can be obtained. However, when it is used as clothing, the stress that develops the expansion and contraction performance is large, and there is a difficulty in wearing comfort.In addition, the twisting yarn increases the bundle converging property, and the twisting yarn increases the rigidity and the flexibility of the fabric. There was a drawback that it lacked.

On the other hand, synthetic fibers are superior to natural fibers such as cotton, hemp, and wool in strength, abrasion resistance, dimensional stability, wash-and-wear property, quick-drying property, etc.
Widely used as a clothing material. However, synthetic fibers generally have excellent antistatic property, water absorption performance, which natural fibers have.
It does not absorb and release moisture, and when worn in winter it clings to dust and adheres to dust, and when it is worn in summer it becomes stuffy and sticky due to sweating, making it inferior in terms of comfort to natural fibers. It was

In order to solve these problems, attempts have been made to impart water absorption and moisture absorption / desorption properties to synthetic fibers. For example, as a method of imparting the above-mentioned function to nylon fibers and polyester fibers by post-processing, a method of graft-polymerizing vinylcarboxylic acid using a radical initiator or an electron beam (JP-A-4-146271 and JP-A-4-4-2).
No. 72272) is known, but this method has various problems such as deterioration of fiber strength due to processing, hardening of texture, and lack of durability of effect. In addition, a composite fiber compounded with polyalkylxylene glycol in the production stage of the raw yarn (Japanese Patent Laid-Open No. 39-5214), a hollow fiber made of a fiber-forming polymer having a through groove from the fiber surface to the hollow portion (Japanese Patent Laid-Open No. No. 60-37203), finely porous fibers obtained by alkali-treating polyester fibers in which an organic sulfonic acid compound is uniformly dispersed (JP-A-60-167).
No. 969) has been proposed. However, each of these fibers has a low level of hygroscopicity and does not satisfy both the water absorbing performance and the moisture absorbing / releasing performance to a sufficient level at the same time. On the other hand, Japanese Patent Application Laid-Open No. 11-241226 proposes a moisture-absorbing / releasing polyamide composite fiber. When this fiber is used on the tissue surface of a woven fabric, the moisture-absorbing / releasing property partially causes water-absorption irregularity-like water. There is a problem that spots are generated and the quality is degraded.

Further, Japanese Patent Laid-Open No. 64-77655 proposes an inner cloth in which the back surface of the cloth has irregularities, the ground structure is formed of hygroscopic nylon threads, and the projections are formed of polyester filament threads. However, there are problems such as difficulty in temperature control during dyeing and poor dyeing fastness. Further, in JP-B-63-27470, a double woven or knitted fabric is subjected to a water repellent finish using a polyester fiber, and a hollow fabric is used as a back fabric to produce a surface water repellent and a backside water-absorption treated fabric. A method has been proposed. However, since the back surface of the woven or knitted fabric obtained by this method is not subjected to water absorption processing, the sweat absorption function is weak, and since the surface is subjected to water repellent processing, the absorbed water remains on the back surface.
It causes unevenness and leaves a problem.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned present circumstances, is highly flexible, and can exhibit stretchability with low stress, and has a feeling of discomfort or stickiness when worn. It is an object of the present invention to provide a stretchable polyamide woven fabric having excellent water absorption and moisture absorption / desorption properties that does not give rise to feeling.

[0009]

Means for Solving the Problems The present invention is to solve the above problems, and is a woven fabric having a double structure having irregularities on the back surface, and a warp composed of two types of polyamides having different melt viscosities. It is a yarn obtained by twisting a crimpable polyamide filament yarn with a twist coefficient of 3000 to 15000, and the weft yarn of the back structure is a moisture absorbing / releasing synthetic fiber filament yarn,
Tensile ratio of 4.9N / 3cm stress in warp direction is 10% or more, and 14.7N / 3cm stress elongation ratio is 4.9N / 3cm
Ratio of elongation at stress is 2.0 or less, elongation recovery is 80%
The gist is a stretchable polyamide woven fabric characterized by the above. Here, the twist coefficient K is the number of twists T times /
When m and fineness D are expressed in decitex, K = T × D ^1/2 .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The fabric of the present invention has a double weave. The double structure that can be used in the present invention may be any of a double weft structure and a double weft structure as long as it can form irregularities on the back surface. The double design, which can form irregularities on the back surface, is a design in which ridges can be formed on the back surface by the yarn used for the back design, and the back surface is formed on the back surface by the back weft thread or the ridges formed by both back warp and back weft threads It is a structure where irregularities are formed. The unevenness is formed on the back surface of the woven fabric to create a space inside the garment due to the unevenness on the back surface and reduce the sticky feeling by changing the contact between the skin and the fabric from the surface contact to the line contact / point contact. .

The tissues illustrated in FIGS. 1 to 4 are specific examples of the tissues that can be used for the fabric of the present invention, but are not limited to these tissues. The design shown in FIGS. 1 to 3 is an example of a weft double design, in which back wefts are driven at intervals to form ridges. FIG. 1 shows an example in which the back wefts are driven in at regular intervals, and FIG. 2 shows an example in which the back wefts are driven in a combination of large and small driving intervals. In FIG. 3, the front design is a 10-sheet French twill design, the back design is a 4/1 twill design, and the front and back wefts are driven in at a ratio of 2: 1. The organization shown in FIG. 4 has a table organization of 2
This is an example of a warp / weft double design in which the back design is a flat design with a / 2 twill design, and the back warp and back wefts are arranged at intervals.

The warp yarn of the stretchable polyamide fabric of the present invention is
A latent crimpable polyamide filament yarn composed of two types of polyamides having different melt viscosities has a twist coefficient of 1000 to 150.
The yarn is a twisted yarn of 00. Latent crimpable polyamide filament yarn consisting of two types of polyamides with different melt viscosities is a fiber obtained by laminating two types of polyamides with different viscosity differences in a side-by-side type or two types of polyamides with different viscosity eccentricity. The fibers are arranged in a sheath shape.

Polyamides that can be used include
Nylon 6, Nylon 66, Nylon 69, Nylon 4
6, Nylon 610, Nylon 12, polymeta-xylene adipamide and copolymers of each of these components. Among them, particularly, combinations of Nylon 6 having different viscosities and nylon 6/66 as a high-viscosity polyamide are used. A combination using a copolymer and nylon 6 as a low-viscosity polyamide is preferable. When using a nylon 6/66 copolymer, the copolymerization ratio of nylon 66 is preferably 5 to 35 mol% from the viewpoint of melting point and shrinkage.

In order to obtain high crimping performance, the difference in viscosity between the high viscosity polyamide and the low viscosity polyamide is 0.4 in terms of relative viscosity.
It is preferable to be set to 1.6, and in the case of a combination of nylon 6 with each other, the relative viscosity of high viscosity nylon 6 is 2.
7 to 4.2, the relative viscosity of low viscosity nylon 6 is
It is preferably from 2.0 to 3.2. In the case of a combination of Nylon 6 and Nylon 6/66 copolymer, the relative viscosity of Nylon 6 is 2.0 to 3.2, and Nylon 6/6
The relative viscosity of the 6-copolymer is preferably 2.8 to 4.2.

With respect to the crimp-developing ability of the latently crimpable polyamide filament yarn, it is preferable that the crimping ratio measured as described below is 40% or more in order to obtain a cloth having good stretchability. The crimping rate is 1/5 for the latent crimped yarn using a fineness measuring scale to form a double loop.
Immerse in boiling water for 30 minutes with a load of 6000 g / decitex, take it out, and air dry for 30 minutes, then change the load to 1/500 g / decitex and measure length A, then The length B was calculated by applying a load of 1/20 g / decitex, and was calculated by the following formula. Crimp ratio (%) = [(B−A) / B] × 100

The warp yarn of the stretchable polyamide fabric of the present invention is
A twist coefficient of 3 is added to the latently crimpable polyamide filament yarn.
It is a yarn that is twisted from 000 to 15,000. The latently crimpable polyamide filament yarn is a fiber in which a polyamide polymer having a viscosity difference is pasted in a side-by-side type or arranged in an eccentric core-sheath type. A coiled crimp develops. Since this crimp is expressed in each filament, when it is used as it is and made into a woven fabric, the crimp is expressed in each filament by receiving heat during the finishing process, so that the appearance of wrinkles is seen on the woven fabric surface and the elasticity is excellent. It becomes a quality, but it becomes a problem as a quality. Further, if the width is set to correct this at the time of intermediate setting or finishing setting and the setting is performed, the elasticity will be impaired.

By twisting the latent crimped yarn as in the present invention, the above problems can be prevented. That is, by twisting, the latent crimp stress of each filament of the multifilament yarn becomes one as an aggregate into a coil shape, that is, a spring shape, and when a woven fabric is produced, excellent stretching performance is exhibited. Become. When this twist is applied, there is a correlation between the number of twists and the elasticity, and in the present invention, the twist having a twist coefficient of 3000 to 15000 is applied. Here, the twist coefficient K is K = T × D ^1/2 when the twist number T is expressed in times / m and the fineness D is expressed in decitex.

When the number of twists having a small twist coefficient is low, the binding property becomes weak, crimp stress acts between the respective filaments, and the appearance of wrinkles is observed on the surface of the woven fabric. In this case, the binding property becomes strong, the spring-like form of the yarn becomes dense, and the surface quality of the woven fabric becomes clean, but the stretchability is poor. If a twist with a large twist coefficient is applied, troubles due to twisting will occur in each step of preparation and weaving for twist torque. In this case, twist twist prevention set such as steam set may be performed.

In the present invention, a moisture absorbing / releasing synthetic fiber filament yarn is used as the yarn constituting the weft yarn of the back fabric of the woven fabric. The moisture absorptive and desorptive synthetic fiber according to the present invention,
A synthetic fiber having a high moisture absorption / release property, for example, 2
The increase in the moisture absorption rate when transferring from an atmosphere of 5 ° C x 60% RH to an atmosphere of 34 ° C x 90% RH is 3% or more, and conversely from an atmosphere of 34 ° C x 90% RH to 25 ° C x 60% RH. The moisture absorption rate when moved to the atmosphere of, that is, the moisture release rate is 3
It is preferably a synthetic fiber having a moisture absorbing / releasing property of not less than%. This is because the atmosphere between clothes and skin when exercising in the atmosphere of 25 ° C and 60% RH and sweating liquid is 3
Since it is said to be around 4 ° C and 90% RH,
This is to maintain a good wearing feeling by absorbing moisture between the clothes and the skin by absorbing moisture into the clothes while sweating.

Examples of such moisture-absorbing and desorbing synthetic fibers include fibers produced by blending a compound having a moisture-absorbing and desorbing property with a fiber-forming polymer, and a compound having a moisture-absorbing and desorbing property as a core component or a compound having a moisture-absorbing and desorbing property. A core-sheath type composite fiber prepared by blending a fiber-forming polymer and a fiber-forming polymer to form a core component and using the fiber-forming polymer as a sheath component to produce a yarn. Here, as the fiber-forming polymer, nylon 6,
Examples thereof include polyamides such as nylon 66 and nylon 46, polyethylene terephthalate, polyesters obtained by copolymerizing a polyethylene terephthalate unit with a third component, polyesters such as polybutylene terephthalate and polypropylene terephthalate.

As the compound having a moisture absorbing / releasing property, any compound having a good moisture absorbing property and a small change in color tone may be used.
A polyalkylene oxide modified product obtained by reaction with a polyalkylene oxide, a polyol and an aliphatic diisocyanate compound is preferably used. As polyethylene oxide used as a raw material of this modified polyalkylene oxide, polyethylene oxide, polypropylene oxide and a copolymer of both, as a polyol, ethylene glycol, diethylene glycol, glycols such as propylene glycol, and as an aliphatic diisocyanate, here, Dicyclohexylmethane-including aliphatic diisocyanates
4,4-diisocyanate, 1,6-hexamethylene diisocyanate and the like can be mentioned. When such a polyalkylene oxide modified product is used as a compound having a moisture absorbing / releasing property, it results from an imide ring formed by a resonance structure of an isocyanate group and an aromatic ring as seen when an aromatic isocyanate compound is used. Yellowing is suppressed,
The fibers will not turn yellow even after long-term use, and a composite fiber having excellent weather resistance can be obtained.

Moisture absorbing / releasing property When a polyalkylene oxide modified product is used as the compound having moisture absorbing / releasing properties of the synthetic fiber, the content of this compound is preferably in the range of 0.5 to 60% by mass. If the content of the modified polyalkylene oxide is less than 0.5% by mass, the desired moisture absorbing / releasing property may not be obtained, and if the content exceeds 60% by mass, a problem may occur in spinnability.

Further, the core-sheath composite ratio in the case of the core-sheath composite fiber varies depending on the polymer used and the like, but the mass ratio is 15
It is preferably in the range of / 85 to 85/15, and if the proportion of the core component is smaller than this, moisture absorption and desorption is inferior, and if the proportion of the core component is large, problems may occur in the spinnability.

The surface weft of the present invention may be the moisture absorbing / releasing synthetic fiber thread used for the back tissue, but nylon 6, nylon 66, nylon 69, nylon 46, nylon 6
It may be a yarn made of ordinary polyamide such as 10, nylon 12, polymeta-xylene adipamide or a copolymer of each component thereof. The fibrous properties of the yarn may be straight yarn, crimped by false twisting or the like, or may be subjected to fluid disturbance treatment to have loop fluff.

The woven fabric of the present invention is a woven fabric in which the latently crimpable polyamide filament yarn is used and which exhibits excellent stretchability in the warp direction. That is, JIS L-109
When a stress elongation curve was drawn according to the 6 constant velocity elongation method, the elongation ratio at the stress of 4.9 N / 3 cm in the warp direction was 10% or more, and the elongation ratio at the stress of 14.7 N / 3 cm and 4. 9N / 3cm
The ratio of elongation ratio under stress is 2.0 or less, and the elongation recovery ratio is 80% or more. The stretch ratio at 4.9 N / 3 cm stress is 10% or more, and the ratio of the stretch ratio at 14.7 N / 3 cm stress to the stretch ratio at 4.9 N / 3 cm stress, that is, 14.
The quotient of the elongation at 7 N / 3 cm stress divided by the elongation at 4.9 N / 3 cm stress of 2.0 or less means that the stress elongation curve rises sharply and the expansion / contraction performance is low under low load. It shows that it is being demonstrated. The elongation recovery rate of 80% or more indicates that the elongation recovery property is also excellent.

[0026]

In the woven fabric of the present invention, since the latently crimpable yarn used as the warp is twisted, a spring-like crimp is developed, and appropriate stretchability is obtained even under low tension. In addition, the moisture-absorbing and desorbing synthetic fiber filament yarn that constitutes the weft of the back tissue positively absorbs moisture in the clothes due to vapor-phase sweating and suppresses the rise in the temperature inside the clothes, and also creates unevenness on the back surface. The space inside the garment can be kept low due to both humidity and moisture. In addition, due to the unevenness on the back surface, the contact between the clothes and the skin surface changes from surface contact to line contact or point contact, which does not cause discomfort even when contacting the skin after moisture absorption. The feeling of stickiness can be reduced, and a comfortable wearing feeling can be obtained.

[0027]

EXAMPLES The present invention will be described in detail with reference to examples. The evaluations in the examples were performed by the following methods. (1) The moisture absorptive and desorptive sample is dried at a temperature of 105 ° C. for 2 hours to measure the weight W ₀ , and then the humidity is measured at a temperature of 25 ° C. and a relative humidity of 60% for 2 hours to measure the weight W ₁ . Then, the initial moisture content M ₀ is calculated by the following equation (a). Next, this sample is allowed to absorb moisture under the conditions of a temperature of 34 ° C. and a relative humidity of 90% for 24 hours, the weight W ₂ is measured, and the moisture content M ₁ after moisture absorption is calculated by the following formula (b). Subsequently, this sample is left for another 24 hours under the conditions of a temperature of 25 ° C. and a relative humidity of 60%, the weight W ₃ is measured, and the moisture content M ₂ after moisture release is calculated by the following formula (c). M ₀ (%) = ((W ₁ −W ₀ ) / W ₀ ) × 100 (a) M ₁ (%) = ((W ₂ −W ₀ ) / W ₀ ) × 100 (b) M ₂ (% ) = ((W ₃ −W ₀ ) / W ₀ ) × 100 (c) (2) Elongation rate The stress elongation curve obtained by the constant speed elongation method of JIS L-1096 was 4.9 N / 3 cm stress and 14. The elongation rate was calculated from the elongation at 7 N / 3 cm stress. The elongation rate at 4.9 N / 3 cm stress is expressed as E4.9, and the elongation rate at 14.7 N / 3 cm stress is expressed as E14.7. (3) Extension recovery rate Measured according to the constant speed extension method of JIS L-1096, the extension recovery rate is expressed as ER.

Example 1 Nylon 6 having a relative viscosity of 2.5 was used as the low-viscosity polymer, and nylon 6/66 copolymer having a relative viscosity of 3.1 was used as the high-viscosity polymer (the copolymerization of nylon 66 was 15 mol).
%), A side-by-side type composite spinneret was attached to a conventional composite melt spinning device, and the composite ratio of the low viscosity polymer and the high viscosity polymer was set to 1: 1 and the polymer temperature 270
Melt-spun at 0 ° C. After cooling the composite fiber and applying an oil agent, the composite fiber was taken up by being hung on a first roller at a speed of 3077 m / min and a temperature of 70 ° C. five times, and subsequently at a speed of 4154 m / min.
1 minute, 1.35 times the second roller at a temperature of 160 ℃
Double heat stretching, then wind at a speed of 4000 m / min, and
A latent crimpable polyamide filament yarn having a circular cross-section of 7 decitex / 12 filaments (crimping ratio of filament yarn: 53, 5%) was obtained. This yarn was twisted at 500 t / m (twist coefficient 4387) and used as a warp. As the weft of the surface design, two ordinary nylon 6 filament yarns 78 decitex / 24 filament false twist textured yarns were combined and twisted at a twist number of 100 T / m to obtain 156 decitex. Further, as the weft of the back structure, 85 parts by mass of nylon 6 having a relative viscosity of 2.6 measured in a m-cresol solvent at a concentration of 0.5 g / deciliter and a temperature of 20 ° C., polyethylene oxide, and 1,4-butane are used. Modified polyalkylene which is a reaction product of diol and dicyclohexylmethane 4,4 diisocyanate (1 g
Hygroscopic capacity 35 g) 15 parts by mass as a core component, nylon 6 having a relative viscosity of 2.6 as a sheath component, and a core component / sheath component mass ratio of 1: 1 with 24 holes. Melt-spinning at a spinning temperature of 255 ° C. using a core-sheath type composite spinneret having, and spraying air at 18 ° C. on the spun yarn to cool it, and after applying an oil agent, 1300 m /
Winding at min, stretching 3.0 times, false twist number 340
Two false twisted yarns of 84 dtex / 24f core-sheath type moisture absorptive and desorptive composite fiber obtained by performing false twisting at 0 T / M, false twisting temperature of 180 ° C. and false twisting overfeed rate of −5% are 100 T / M.
168 dtex was obtained by plying with a twist number of m. Then, in the design shown in FIG. 3, the warp density is 172 yarns /
Weaving was carried out with a weft density of 2.5 cm, a weft density of 102 threads / 2.5 cm, and a front and back weft ratio of 2: 1. The obtained woven fabric is refined at 80 ° C. by a softener, then relaxed at 95 ° C. with a jet dyeing machine, then dried, intermediate set, dyed and finish set, warp density 100 / 2.5 cm, Weft density 13
Eight / 2.5 cm stretchable polyamide fabric of the present invention was obtained.

Example 2, Comparative Examples 1 to 2 In Example 1, the number of twists of the warp is 500 t / m (twist coefficient 4387) to 1200 t / m (twist coefficient 10530, Example 2), 200 t / m (twist coefficient). 1755, Comparative Example 1)
And 2000 t / m (twisting coefficient 17549, Comparative Example 2), respectively, and fabrics of Examples 2-4 and Comparative Examples 1-2 were obtained in the same manner as in Example 1. 12
80 ℃ after twisting 00t / m and 2000t / m,
A 30-minute steam set was performed.

Comparative Example 3 As warp, nylon 6 false twisted yarn 78 decitex /
Twist of 500 t / m for 24 filaments (twist coefficient 438
A nylon woven fabric of Comparative Example 3 was obtained in the same manner as in Example 1 except that 7) was applied and used.

Comparative Example 4 A nylon woven fabric of Comparative Example 4 was obtained in the same manner as in Example 1 except that the back weft was the same yarn as the front weft.

Comparative Example 5 A nylon woven fabric of Comparative Example 5 was obtained in Example 1, except that the back weft was not used and the structure was woven as 10 French twill with no back structure and finished as in Example 1. . The performance of the obtained woven fabrics of Examples 1 and 2 and Comparative Examples 1 to 5 is shown together in Table 1.

[0033]

[Table 1]

As is clear from Table 1, Examples 1-2
Stretches well under low stress, has good stretchability, has excellent moisture absorption and desorption, and the unevenness of the back surface of the fabric reduces the contact area with the skin, making it sticky even when sweating. It was a comfortable thing without feeling or discomfort. In Comparative Example 1, the elongation performance was good, but since the number of twists was small, the surface of the fabric was wrinkled, resulting in a fried willow-like surface. When the finishing width was changed to eliminate this wrinkle, the stretchability was completely lost. . Comparative Examples 2 and 3 were inferior in stretchability although moisture absorption and desorption were observed. In Comparative Example 4, stretchability was recognized, but it was inferior in terms of moisture absorption and desorption, and the stickiness was slightly reduced due to the unevenness of the back surface, but the unevenness was inferior.
In Comparative Example 5, stretchability is recognized, but it is inferior in terms of moisture absorption and desorption, and the back surface and the skin are in contact with each other over the entire surface.
It was a feeling of stuffiness.

Example 4 As the yarn to be used, the same yarn as in Example 1 was used, and the design was a double weft design shown in FIG. 4, and the warp density was 190 yarns / 2.5c.
Weaving was carried out at a weft density of 114 yarns / 2.5 cm, and the resulting woven fabric was subjected to the finishing treatment in the same manner as in Example 1 to give a warp density of 236 yarns / 2.5 cm and a weft yarn density of 150 yarns / 2.5 cm. A woven polyamide fabric was obtained. 4.9 in the warp direction of the resulting fabric
The elongation ratio at N / 3 cm stress is 24%, the elongation ratio at 14.7 N / 3 cm stress is 30%, and the ratio of elongation ratio at 14.7 N / 3 cm stress and 4.9 N / 3 cm stress is 1. 0.25, elongation recovery rate 90%, excellent stretchability, M
₀ was 6.1%, M ₁ was 10.1%, and M ₂ was 6.4%, and the moisture absorption and desorption properties were excellent.

[0036]

As in the present invention, when the warp is formed by twisting latent crimping polyamide multifilament yarns having different melt viscosities, the spring-like crimping effect can be exhibited. Appropriate stretchability can be obtained even under low stress, and it is possible to provide a stretchable polyamide woven fabric in which vapor-phase sweating at the time of wearing can be obtained by making the weft of the back tissue a moisture-absorbing / releasing synthetic fiber. . The woven fabric of the present invention is suitable as a material for clothing, and particularly when it is used for sports clothing, its characteristics are remarkably exhibited.

[Brief description of drawings]

FIG. 1 is an example of a fabric structure diagram that can be used in the present invention.

FIG. 2 is an example of a fabric structure chart that can be used in the present invention.

FIG. 3 is an example of a fabric structure chart that can be used in the present invention.

FIG. 4 is an example of a fabric structure chart that can be used in the present invention.

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Claims (2)

[Claims] 1. A latently crimpable polyamide filament yarn, which is a woven fabric having a double structure having irregularities on the back surface, wherein the warp yarn is composed of two types of polyamides having different melt viscosities, and twisted with a twist coefficient of 3000 to 15000. It is a yarn, the weft of the back structure is a moisture absorbing / releasing synthetic fiber filament yarn, and the elongation rate at a stress of 4.9 N / 3 cm in the warp direction is 10% or more, 1
A stretchable polyamide fabric characterized in that the ratio of the elongation rate at 4.7 N / 3 cm stress to the elongation rate at 4.9 N / 3 cm stress is 2.0 or less and the elongation recovery rate is 80% or more. Here, the twist coefficient K is K = T × D ^1/2 when the twist number T is expressed in times / m and the fineness D is expressed in decitex. 2. A moisture absorbent absorbent fiber filament yarn comprising a polyalkylene oxide modified product obtained by reaction of polyalkylene oxide with a polyol and an aliphatic diisocyanate compound, or a core component composed of the modified product and polyamide, and a polyamide. The stretchable polyamide woven fabric according to claim 1, which is a core-sheath composite type moisture absorptive and desorptive synthetic fiber filament yarn composed of a sheath component.