JP2015067914A - Denim-like cloth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a denim-like cloth comprising water absorption and moisture sorption and desorption equal to what is required for cotton denim, being superior to water absorption and quick-drying, contact cool feeling and extension recovery of a weft direction, having light volume, and being superior in texture in wearing.SOLUTION: As for a denim-like cloth, warp is cotton slub yarn thinner than cotton yarn number 8/1, weft is bicomponent filament yarn of crimp finished yarn using polyamide-based moisture sorption and desorption fiber and polyurethane yarn, and a basis weight is not more than 300 g/m.

Description

  The present invention relates to a denim fabric.

  Denim fabrics used for jeans, denim jackets, and the like are pre-dyed fabrics that use thick cotton spun yarns obtained by rope dyeing with indigo dyes as warps. A fabric using synthetic fibers instead of cotton has also been proposed, but it cannot be generally used. This is because common synthetic fibers such as polyester and polyamide are superior in strength and easy-care properties, but they are less hygroscopic than cotton. This is because it has a problem.

  In order to overcome such problems when using synthetic fibers, nylon spun fabrics have been proposed in which nylon is selected as the fiber material and its cross section is hollow to exhibit the same water absorption as cotton (Patent Literature). 1). However, since ordinary polyamide fibers are manufactured by melt spinning, it is difficult to form a high hollow structure, and since the modulus of the polymer itself is low, there are a variety of processes that take place during each process such as spinning, woven fabric, and dyeing. There is a problem that the hollow structure is crushed by pressure.

  Nylon denim which maintains the water absorption level like cotton by maintaining the hollow part and also aims at lightness and heat retention has been proposed (see Patent Document 2). This uses a spun yarn composed of short fibers of a core-sheath composite in which polyester is disposed in the core and polyamide is disposed in the sheath. It is made hollow and lightweight like this. Nylon spun yarn has the advantage of improving heat retention. However, the post-process of alkali dissolution has a large environmental load, and the nylon denim of Patent Document 2 does not deal with stretchability.

  In particular, ladies' jeans are expected to expand and contract during sitting because of the trend of thin, shallow crotch and close-fitting designs. In other words, there is an increasing demand for stretch denim. In order to cope with this, stretch denim (patent document 3) using a mixture of spandex and the like, and those using polyester crimped yarn other than spandex (patent document 4) have been proposed.

  However, stretch denim mixed with spandex, etc., that is, denim using cotton and polyurethane composite yarn as weft, is stretchable but inferior in recoverability, so it is prone to kneeling and the denim itself is heavy. Therefore, there is a problem that it is inferior in quick-drying property and therefore difficult to dry when wet. Moreover, when a polyester crimped yarn is used as described in Patent Document 4, there is a problem that the texture is inferior to that of conventional cotton denim due to a decrease in hygroscopicity and a dry feeling peculiar to polyester.

JP 2002-302844 A JP 2004-316003 A Japanese National Patent Publication No. 10-508913 JP 2002-155449 A

  The present invention has water absorption and moisture absorption equivalent to those required for cotton denim, and is further superior in water absorption quick drying, contact coolness, and stretch recovery in the weft direction, and has a lightweight feel and is worn. The technical challenge is to provide a denim-like woven fabric with excellent texture.

  The present inventors use a composite yarn of a polyamide-based moisture-absorbing / releasing fiber crimped yarn and polyurethane yarn as a weft to achieve water absorption and hygroscopicity equivalent to that of a cotton material, and then only elongation. In addition, it has good returnability, excellent contact coolness and texture when worn, and has been designed with a fabric design that uses a fine count from cotton count 8/1 for cotton slab yarn to be placed on the warp. It has been found that it can be made into a denim-like woven fabric having a combination of light weight and quick-drying, and the present invention has been completed.

That is, in the denim-like woven fabric of the present invention, the warp is a cotton slab yarn that is finer than the cotton count 8/1, and the weft is a composite yarn of a crimped yarn using a polyamide-based moisture-absorbing and releasing fiber and a polyurethane yarn. Yes, the basis weight is 300 g / m ² or less.

According to the denim-like woven fabric of the present invention, the warp is composed of cotton slab yarn and the weft is composed of composite yarn including polyamide moisture-absorbing / releasing fibers, achieving water absorption and moisture absorption equivalent to cotton denim. can do. Moreover, since it has a low basis weight of 300 g / m ² or less, it is possible to achieve water-absorbing quick-drying properties, and it is possible to achieve cool contact feeling with polyamide-based moisture-absorbing / releasing fibers. Based on the fact that the weft is composed of a composite yarn of a crimped yarn using a polyamide-based moisture-absorbing / releasing fiber and a polyurethane yarn, so that it has excellent stretch recovery in the weft direction and has a low basis weight of 300 g / m ² or less. It is possible to provide a denim-like woven fabric that is excellent in lightness and soft texture at the time of wearing, which is unique to polyamides that constitute polyamide-based moisture-absorbing / releasing fibers.

  The denim-like woven fabric of the present invention maintains water-absorbing and moisture-absorbing properties while maintaining practical utility equivalent to that of ordinary denim, water-absorbing quick-drying, contact coolness, weft recovery, lightness, It has an excellent texture. Specifically, the denim-like fabric of the present invention uses a composite yarn of a crimped yarn using a polyamide-based moisture absorbing / releasing fiber and a polyurethane yarn as a weft, and the warp is finer than cotton count 8/1. The fabric design uses count cotton slab yarn. As a result, the water absorbency and hygroscopicity equivalent to those of normal cotton denim are not impaired, and not only the elongation but also the returnability, that is, the recovery from the elongation is good, the contact cool feeling when worn is excellent, and the unit area It is possible to realize a denim-like woven fabric with a light fabric weight and good texture.

The denim-like woven fabric of the present invention needs to have a mass per unit area (weight per unit area) of 300 g / m ² or less, and a contact cool sensation Qmax indicating a cool feeling when worn is 0.20 w / cm ^2. The above is preferable.

Conventionally known denim is generally formed into a woven fabric with a high density and a thick count, so it inevitably has a high mass and a basis weight of around 500 g / m ² is common. However, there is a current situation in which the feeling of weight based on such a high mass leads to a result that the wearing comfort is remarkably impaired. Moreover, since it has a feeling of weight, ie, it has a high basis weight, it is difficult to dry after washing and is inferior in quick-drying. On the other hand, as the development of denim with added functionality progresses, many products using functional polyester processed yarns with excellent quick-drying and dry feeling are on the market. However, products utilizing these functional polyester processed yarns are not satisfactory in terms of softness and smoothness as a texture when worn because polyester is arranged on the part that directly contacts the skin.

The denim-like woven fabric of the present invention has a quick drying property after absorbing water because the basis weight is 300 g / m ² or less. As an indicator of quick drying, the time until the residual moisture content reaches 10% at the time of drying after absorbing water can be used. In the denim fabric of the present invention, this time can be 90 minutes or less.

The denim-like woven fabric of the present invention can be typically used for applications that can be worn while maintaining comfort in the sweaty season of summer, and therefore, not only water absorption but also moisture absorption equivalent to cotton Functions such as stretchability and quick-drying to follow the movement when worn are important. Moreover, as described above, the light weight that the fabric weight is 300 g / m ² or less is important.

In order to make the basis weight 300 g / m ² or less, in the present invention, as described later, it is necessary to use a cotton slab yarn having a finer count than 8/1 as the warp yarn. Furthermore, in order to reduce the basis weight to 300 g / m ² or less, the fineness of the weft composed of the composite yarn of the crimped yarn and the polyurethane yarn using the polyamide-based moisture-absorbing / releasing fibers is appropriately adjusted. is necessary.

The denim-like woven fabric of the present invention can achieve such a light feeling and can exhibit a high value of 0.2 W / cm ² or more for the cool contact feeling (Qmax) representing the cool contact feeling. This is because polyamide-based moisture absorbing / releasing fibers are used. When this Qmax is 0.2 W / cm ² or more, it satisfies the contact amount sensation performance that can be felt when worn.

  Regarding the stretchability of the denim fabric of the present invention, the elongation in the weft direction is preferably 20% or more, and more preferably 25% or more. The recovery rate is preferably 65% or more, and more preferably 75% or more. When the elongation rate is less than 20%, the following performance tends to be poor with respect to the movement at the time of wearing, and an unpleasant wearing feeling tends to occur. On the other hand, if the recoverability is less than 65%, knee breakage or the like is likely to occur, and the appearance quality is likely to deteriorate. Such an extension rate and recovery rate in the weft direction can be achieved by the polyurethane yarn in the composite yarn constituting the weft yarn. In particular, the required elongation and recovery can be achieved with common polyurethane yarns available on the market. Since the composite yarn constituting the weft is formed by the polyurethane yarn and the crimped yarn using the polyamide-based moisture-absorbing and releasing fibers, the crimped yarn does not hinder the expansion and contraction of the polyurethane yarn. The required elongation rate and recovery rate due to the polyurethane yarn can be fully expressed.

  The denim-like woven fabric of the present invention has a high level of moisture absorption and desorption because the weft includes polyamide-based moisture-absorbing / releasing fibers and the warp is composed of cotton slab yarn. For example, the increase in moisture absorption (RMA) when transferred from an atmosphere of 25 ° C. × 60% RH to an atmosphere of 34 ° C. × 90% RH is 3% or more, and conversely, 25% from an atmosphere of 34 ° C. × 90% RH. Decrease in moisture absorption when transferred to an atmosphere of ° C x 60% RH, that is, moisture absorption / release with a moisture release rate (RMD) of 3% or more. Thereby, it is excellent in moisture absorption / release property and can exhibit the effect of reducing the feeling of stuffiness. This is because it is said that the atmosphere between the clothes and the skin when sweating by exercising in an atmosphere of 25 ° C. × 60% RH is 34 ° C. × 90% RH. A good wearing feeling is maintained by absorbing moisture between the clothes and the skin by moisture absorption.

  As the polyamide-based moisture-absorbing / releasing fibers constituting the wefts of denim-like woven fabrics, are fibers made by blending and spinning moisture-absorbing / releasing compounds and polyamides, or compounds having moisture-absorbing / releasing properties as core components? Or the core-sheath type | mold composite fiber etc. which spun using the blend of the compound which has a moisture absorption / release property, and a polyamide as a core component and using polyamide as a sheath component are mentioned. The polyamide-based moisture-absorbing / releasing fiber of the present invention needs to be a crimped yarn that has been subjected to false twisting or the like, and can thereby exhibit a desired stretch recovery in the weft direction.

  Examples of the polyamide used here include nylon 6, nylon 66, nylon 46, and the like. As the properties of the polyamide-based moisture-absorbing / releasing fibers, long fiber yarns are suitable because of the characteristics of the denim fabric.

  As the compound having moisture absorption / release properties, any compound having good moisture absorption / release properties and little change in color tone may be used. Specifically, a polyalkylene oxide modified product obtained by a reaction of a polyalkylene oxide, a polyol and an aliphatic diisocyanate compound is preferable. Examples of the polyalkylene oxide used as a raw material for the modified polyalkylene oxide include polyethylene oxide, polypropylene oxide, and a copolymer of both. Examples of the polyol include glycols such as ethylene glycol, diethylene glycol, and propylene glycol. Examples of the aliphatic diisocyanate include dicyclohexylmethane-4,4-diisocyanate and 1,6-hexamethylene diisocyanate. When such a polyalkylene oxide-modified product is used as a moisture-absorbing / releasing compound, a yellow color caused by 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. Change is suppressed. That is, even if it is used for a long time, the fiber does not turn yellow, and a composite fiber excellent in weather resistance can be obtained.

  When a polyalkylene oxide modified product is used as a hygroscopic compound for polyamide-based hygroscopic fibers, the content of this compound is in the range of 0.5 to 60% by mass in the polyamide-based hygroscopic fiber. Is preferred. If the content of the polyalkylene oxide-modified product is less than 0.5% by mass, the intended moisture absorption / release property may not be obtained. On the contrary, if the content exceeds 60% by mass, a problem may occur in spinnability. .

  In the case where the polyamide-based moisture-absorbing / releasing fiber is a core-sheath type composite fiber obtained by spinning a blend of a compound having moisture absorption / release properties and polyamide as a core component and polyamide as a sheath component, the core-sheath composite ratio is The core / sheath ratio is preferably in the range of 15/85 to 85/15. If the ratio of the core component is lower than this, the moisture absorption / release property is inferior, and if the ratio of the core component is high, a problem occurs in the spinnability. There is a fear.

  As the composite yarn of the polyamide-based moisture-absorbing / releasing fiber and the polyurethane yarn used in the present invention, a mixed yarn in which the polyamide-based moisture-releasing / releasing fiber and the polyurethane yarn are entangled with air, or the polyurethane yarn is a polyamide-based absorbing / releasing material. Examples include so-called FTY type composite yarns that are single-covered or double-covered with wet fibers. It is preferable that the draft rate of the polyurethane at the time of compounding is 3.0 to 3.5 from the viewpoint of the stretchability of the denim-like woven fabric of the present invention, that is, the stretchability.

  From the viewpoint of the fabric design of the denim-like woven fabric of the present invention, the warp is a cotton slab yarn dyed with an indigo dye, and the composite yarn of the polyamide-based moisture-absorbing / releasing fiber used for the weft and the polyurethane yarn is a white yarn. Can be left. In order to express the lightness and quick drying of the fabric, it is necessary to use a fine count rather than a cotton count 8/1 for the warp. The cotton count is preferably 14/1 to 18/1. If it is thicker than 8/1, the weight of the dough becomes too heavy and the quick-drying property is remarkably lowered. On the other hand, when the fine count is 20/1 or more, the texture, strength and fabric thickness peculiar to denim are insufficient.

  In the denim-like fabric of the present invention, when this fabric is composed of a twill weave structure, the denim tone can be expressed most effectively. However, in order to further improve the cool contact feeling, you may use satin weaving that aims to arrange the wefts on the skin surface even a little.

  The weaving process can be a process similar to a normal spun fabric. For example, as a usable loom, it is possible to sufficiently cope with an innovative loom such as an air jet loom or a rapier loom, or a normal loom.

  The denim-like woven fabric of the present invention has a water-absorbing quick-drying property, a contact cool feeling property, a wetting direction stretch recovery property, and a light weight feeling without impairing water absorption and moisture absorption / release properties equivalent to those of ordinary cotton denim using only a cotton material. , It has a feature that combines excellent performance in texture. For this reason, it is suitable for jeans use, and when used for jeans, its functional characteristics can be sufficiently exhibited. Furthermore, the present invention can be used for other applications utilizing the above-described features, such as outdoor clothing / apparatus, mountain clothing / apparatus, and the like.

Evaluation of the textiles in the following examples and comparative examples was carried out by the following method.
(1) Fabric weight A test piece of 25 cm × 25 cm was collected from the fabric, sufficiently dried until the equilibrium level ratio or less, and left in a room at 20 ° C. × 65% RH for 24 hours to achieve level equilibrium. The mass of the test piece was measured. The mass of the obtained test piece was converted per 1 m ² , and the basis weight was expressed as an average value for two test pieces.

(2) Water absorption It evaluated by the dripping method prescribed | regulated to JISL1907. Specifically, a drop of water is dropped on the test piece attached to the holding frame, and the time (seconds) from when the water drop reaches the test piece until the specular reflection of water disappears due to water absorption is measured. Evaluated.

(3) Moisture absorption / release performance After measuring the mass W0 after drying the sample at a temperature of 105 ° C. for 2 hours, the mass W1 is measured after conditioning for 2 hours under the conditions of a temperature of 25 ° C. and a relative humidity of 60%, The initial moisture content M0 was determined by the following equation (a). Next, the sample was absorbed for 24 hours under conditions of a temperature of 34 ° C. and a relative humidity of 90%, then the mass W2 was measured, and the moisture content M1 after moisture absorption was calculated by the following equation (b). And the difference of M1 and M0 was computed by the following Formula (c) as hygroscopicity (RMA).

M0 [%] = {(W1-W0) / W0} × 100 (a)
M1 [%] = {(W2−W0) / W0} × 100 (b)
Hygroscopicity (RMA) = M1-M0 (c)
The sample after moisture absorption under the above conditions was allowed to dehumidify for 24 hours under the conditions of a temperature of 25 ° C. and a relative humidity of 60%, and then the mass W3 was measured. Calculated by And the difference of M2 and M1 was computed by the following Formula (e) as moisture release property (RMD).

M2 [%] = {(W3-W0) / W0} × 100 (d)
Moisture release (RMD) = M1-M2 (e)
(4) Contact cool sensation Using a precise rapid thermophysical property measuring apparatus (product name: THERMO RABO II, manufactured by Kato Tech Co., Ltd.), the maximum heat absorption rate (Qmax) [W / cm ² ] under the condition of ΔT = 20 ° C. is measured. The contact coolness was evaluated by the measured value.

(5) Elongation rate and recovery rate in the weft direction JIS L 1096 Elongation recovery rate Measured according to method B (constant load method) and “elongation recovery rate and residual strain rate” B-1 method (constant load method). The details are as follows.

・ Elongation rate Three specimens measuring 6 cm in the warp direction and 30 cm in the weft direction were taken from the sample adjusted so that the dimensional change was stable, and an equal number of yarns were extracted from both ends in the width direction, that is, the warp direction. This was a test piece. Using a tensile tester, one end in the length direction, that is, the weft direction of this test piece was fixed with an upper clamp, and a load corresponding to a weight of 5% of the basis weight (g / m ² ) was applied as an initial load. A pair of marks was made at 20 cm intervals. Then, gently apply a load of 14.7 N from the initial load corresponding to no load, measure the length (cm) between the pair of marks after standing for 1 minute, and obtain the elongation rate (%) by the following formula. It was. The average value of the elongation obtained three times was calculated and rounded to one digit after the decimal point to obtain a measured value.

EP = {(L1-L0) / L0} × 100
Here, EP: elongation rate (%), L0: length between original marks (20 cm), and L1: length between marks after applying a load of 14.7 N for 1 minute (cm).

-Elongation recovery rate The test piece adjustment, initial load application, and marking were the same as in the measurement of the elongation rate. Next, a load of 14.7 N was applied gently, and the length (cm) between the pair of marks after standing for 1 hour was measured. Next, the load was removed, the initial load was applied again 30 seconds later, the length (cm) between the marks was measured again, and the elongation recovery rate (%) was determined by the following formula. The average value of the elongation recovery rate obtained three times was calculated and rounded to one decimal place to obtain a measured value.

Er = {(L1-L1a) / (L1-L0)} × 100
Here, Er: elongation recovery rate (%), L0: length between original marks (20 cm), L1: length between marks after being applied for 1 hour with a load of 14.7 N (cm), L1a : The length (cm) between the marks when the initial load is applied 30 seconds after the load is removed.

(6) Quick drying (diffusible residual moisture content)
0.6 g of distilled water was dropped onto the central part of the glass plate placed on the balance. A test piece cut to 10 cm × 10 cm was placed on this so that the distilled water was in contact with the back surface (skin surface). Then, the weight change of the test piece containing distilled water was measured, the time (minutes) until the residual moisture content reached 10% was measured, and the measured value was used as an index for quick drying.

(7) Texture A sensory test was performed by touching the skin side where wefts were arranged in a denim-like woven fabric with a finger, and a determination was made based on the following criteria.
◯: Both fabric softness and fabric surface slipperiness are good △: Fabric softness and fabric surface slipperiness are both slightly inferior

<Example 1>
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 / L and 20 ° C., polyethylene oxide, 1,4-butanediol, dicyclohexylmethane 4,4 diisocyanate A mixture obtained by blending 15 parts by mass of a polyalkylene oxide-modified product (1 g of hygroscopic capacity 35 g), which is the reaction product, was used as a core component. Further, nylon 6 having a relative viscosity of 2.6 was used as a sheath component. Then, the core / sheath component was set to a mass ratio of 50/50, and the core / sheath compound spinning / drawing was performed, and the false twist was 3400 T / M, the false twist temperature was 180 ° C., and the false twist overfeed rate was −5%. Processing was performed to obtain a false twisted yarn of 84 dtex 24f (single fiber fineness: 3.5 dtex) polyamide-based sheath-type moisture-absorbing / releasing moisture. The content of the modified polyalkylene oxide in the false twisted yarn, that is, the moisture absorbing / releasing fiber, was 7.5%.

  Mixing two polyamide core-sheath type moisture absorbing / releasing long fiber false twisted yarn 84dtex24f thus obtained and polyurethane yarn 22dtex (Lycra T-127C manufactured by Tolo Perontex Co., Ltd.) drafted 3.5 times. Composite with a fiber processing machine to obtain a stretch composite yarn having a total fineness of 170 dtex.

  Next, indigo rope dyed cotton slab yarn 16/1 prepared in advance is used as warp, and stretch composite yarn 170 dtex is used as weft to make the weave fabric into a weave and weave in an air jet loom. A denim-like fabric was prepared.

The above-mentioned initial moisture content M0 of the obtained denim fabric or woven fabric was 6.1%, the moisture content M1 after moisture absorption was 10.0%, and the moisture content M2 after moisture release was 6.4%. It was.
This denim-like fabric was subsequently finished by a regular method. The finishing density thereafter was 100 warps / 25.4 mm (inch) × 84 wefts / 25.4 mm (inch). The denim-like woven fabric thus obtained has a material mixing ratio of cotton / polyamide-based moisture-absorbing / releasing fiber / polyurethane = 70/28/2, basis weight 241 g / m ² , weft elongation 28.5%, wetting recovery The rate is 80.4%, the water absorption performance is 2.3 seconds, the moisture absorption performance (RMA) is 3.9, the moisture release performance (RMD) is 3.6, the contact coolness (Qmax) is 0.23 W / cm ² , The time until the residual moisture content reached 10% was 82 minutes, and the texture was “◯”.

<Example 2>
Compared with Example 1, three weft yarns of polyamide core-sheath type moisture absorbing / releasing long fiber false twisted yarn 84dtex24f and polyurethane yarn 44dtex drafted 3.5 times (Lycra T-manufactured by Toyo Perontex Co., Ltd.) 127C) was mixed using a compound fiber processing machine. Otherwise, in the same manner as in Example 1, a stretch denim of Example 2 in which the finishing density was warp 98 / 25.4 mm (inch) × 80 weft / 25.4 mm (inch) was obtained. The stretch denim thus obtained has a material mixing ratio of cotton / nylon / polyurethane = 65/32/3, a basis weight of 280 g / m ² , a weft elongation of 29.5%, and a weft recovery of 83.0%. The water absorption performance is 2.3 seconds, the moisture absorption performance (RMA) is 4.2, the moisture release performance (RMD) is 4.0, the contact coolness (Qmax) is 0.24 W / cm ² , and the residual moisture content is 10%. The time to reach was 88 minutes, and the texture was “◯”.

<Comparative Example 1>
Compared with Example 1, cotton slab yarn 9/1 is used for the warp, and cotton CSY (trade name) 20 count / 1 for the weft (core: polyurethane 70d, sheath: many cotton fibers, twisted) ) Was used. Otherwise, in the same manner as in Example 1, a cotton stretch denim of Comparative Example 1 in which the finishing density was warp 85 / 25.4 mm (inch) × 57 weft / 25.4 mm (inch) was obtained. The cotton stretch denim thus obtained has a material mixture ratio of cotton / polyurethane = 98/2 in mass ratio, basis weight 414 g / m ² , weft elongation 22.4%, weft recovery rate 64.3%, water absorption performance For 16 seconds, moisture absorption performance (RMA) of 3.8, moisture release performance (RMD) of 3.4, contact coolness (Qmax) of 0.19 W / cm ² , and residual moisture content of 10% The time was 113 minutes and the texture was “Δ”.

<Comparative Example 2>
Compared with Example 1, a cotton slab yarn 9/1 was used as the warp, and a composite mixed yarn of two full-dal polyester processed yarns (167T144f) and polyurethane yarn 44 dtex was used as the weft. Otherwise, in the same manner as in Example 1, a stretch denim of Comparative Example 2 having a finishing density of 89 warps / 25.4 mm (inch) × 54 wefts / 25.4 mm (inch) was obtained. The stretch denim thus obtained has a material mixture ratio of cotton / polyester / polyurethane = 72/26/2 in mass ratio, a basis weight of 320 g / m ² , a weft elongation of 23.7%, and a weft recovery rate of 86.0%. The water absorption performance is 12 seconds, the moisture absorption performance (RMA) is 2.8, the moisture release performance (RMD) is 2.6, the contact coolness (Qmax) is 0.16 W / cm ² , and the residual moisture content is 10%. The time to completion was 75 minutes, and the texture was “Δ”.

<Comparative Example 3>
Compared to Example 1, cotton slab yarn 9/1 was used as the warp, and the polyamide core-sheath type moisture-absorbing and releasing long fiber false twisted yarn 84dtex24f was used as the weft and was drafted 3.5 times. A difference was made in that a composite mixed yarn obtained by combining polyurethane yarn 44 dtex (Lycra T-127C manufactured by Toyo Perontex Co., Ltd.) with a blending processing machine was used. Otherwise, in the same manner as in Example 1, a stretch denim of Comparative Example 3 having a finishing density of 89 warp / 25.4 mm (inches) × 56 wefts / 25.4 mm (inches) was obtained. The stretch denim thus obtained has a material mixture ratio of cotton / nylon / polyurethane = 71/27/2, mass per unit area of 305 g / m ² , weft elongation of 24.6%, and weft recovery of 87.0%. The water absorption performance is 3.5 seconds, the moisture absorption performance (RMA) is 4.0, the moisture release performance (RMD) is 3.9, the contact coolness (Qmax) is 0.22 W / cm ² , and the residual moisture content is 10%. The time required to reach 97 minutes was 97 minutes, and the texture was “◯”.

  Table 1 shows the evaluation results of the above Examples and Comparative Examples.

As shown in Table 1, the denim-like woven fabrics of Examples 1 and 2 were low in basis weight and therefore lightweight, and were excellent in stretch recovery, contact cooling, quick drying, and soft texture peculiar to polyamide. On the other hand, the cotton stretch denim of Comparative Example 1 lacked the lightness, had a low recovery rate, and was inferior in the cool contact feeling and quick drying. The polyester stretch denim of Comparative Example 2 lacked the lightness and was inferior in terms of contact coolness and particularly hygroscopicity. The denim woven fabric of Comparative Example 3 had a basis weight of over 305 g / m ^2, and thus lacked lightness and was inferior in terms of quick drying.

Claims (3)

The warp is a cotton slab yarn that is finer than the cotton count 8/1, the weft is a composite yarn of a crimped yarn and a polyurethane yarn using polyamide-based moisture-absorbing and releasing fibers, and the basis weight is 300 g / m ² or less. Denim-like fabric characterized by   A polyamide-based moisture-absorbing / releasing fiber is composed of a core component composed of a mixture of a polyalkylene oxide-modified product obtained by reaction of a polyalkylene oxide, a polyol and an aliphatic diisocyanate compound and polyamide, and a polyamide. The denim-like woven fabric according to claim 1, which is a core-sheath composite type moisture-absorbing / releasing fiber having a sheath component. The time until the residual moisture content reaches 10% is within 90 minutes, the elongation recovery rate in the weft direction is 75% or more, and the contact cool sensitivity Qmax (ΔT = 20) is 0.2 W / cm ² or more. The denim-like woven fabric according to claim 1 or 2.