JP2017190532A - Elastic fabric - Google Patents

Abstract

[PROBLEMS] To provide a woven fabric that can be used for tops and bottoms in a fabric containing elastic yarns, whose temperature rises instantaneously when stretched and generates heat when stretched permanently even after repeated stretching.
In a stretchable woven fabric composed of a composite yarn of an inelastic yarn and an elastic yarn having a fineness of 250 to 500 dtex for both the warp and the weft, at least the inelastic yarn of the weft is a spun yarn. The elastic yarn is contained in an amount of 15 to 30 g / m ² , and the stretch ratio in the warp direction and the weft direction under a load of 9.8 N of the woven fabric is 30 to 60%, and the predetermined density ratio is 1.2. -1.8, both the warp and the weft, the predetermined composite yarn elongation amount is 1.3-2.5, and the instantaneous heat generation temperature in the warp direction of the woven fabric is 1.0 ° C or more, The stretchable woven fabric characterized by the above.
[Selection figure] None

Description

  The present invention relates to a stretchable fabric containing an elastic yarn whose temperature increases instantaneously when stretched, and a garment made of the fabric.

2. Description of the Related Art Conventionally, clothing that is made of a fabric mixed with moisture-absorbing heat-generating fibers such as cellulose and that heats up due to insensitive excretion or sweating when worn is known as clothing that rises in temperature when worn, such as heat retaining clothing. (For example, refer to Patent Document 1 below). However, these moisture-absorbing heat-generating fibers do not generate any further heat when the fiber's moisture absorption reaches saturation, not only the heat generation time is short, but also after moisture absorption reaches saturation, the moisture absorption in the fiber causes cooling. There was even a feeling.
Patent Document 2 below proposes a woven fabric containing elastic yarns that generates heat when stretched. However, the woven fabric of Patent Document 2 has an elongation of 60 to 150% and elastic yarns of 40 to 150 g. It is a woven fabric suitable for a strong power supporter containing / m ² , and cannot be developed on clothes such as tops such as shirts and bottoms such as pants having a soft stretch feeling.
Thus, at present, no fabric has yet been provided that has a temperature that increases when worn, and that generates heat and can be used for clothes as long as it is easy to move and wears.

JP 2003-227043 A JP 2014-152425 A

  In view of the above-mentioned problems of the prior art, the problem to be solved by the present invention is that, in a fabric containing elastic yarn, the temperature rises instantaneously when stretched, and even when it is repeatedly stretched, heat is generated permanently when stretched. By providing a woven fabric that can be used for skirts and bottoms, and by using the woven fabric, it is possible to provide heat retention and prevention of injury due to warming of muscles and joints of the stretched part and clothing that can be expected to have muscle and fat burning effects. is there.

As a result of intensive investigations and repeated experiments to solve the above-mentioned problems, the present inventors have found that the woven fabric composed of inelastic yarns and elastic yarns has a tempering heat generation temperature of 1.0 ° C. or higher when stretched. The present inventors have found that the problem can be solved and have completed the present invention.
That is, the present invention is as follows.

[1] In both the warp and the weft, a stretchable fabric made of a composite yarn of an inelastic yarn and an elastic yarn having a fineness of 250 to 500 dtex, at least the inelastic yarn of the weft is a spun yarn, The elastic yarn is contained at 15 to 30 g / m ² , and the stretch rate in the warp direction and the weft direction under a load of 9.8 N of the woven fabric is 30 to 60%, and the following formula (1):
Density ratio = (warp density) / (weft density) Formula (1)
Is a ratio of 1.2 to 1.8, and both the warp and the weft are represented by the following formula (2):
Composite yarn elongation amount = B / A Formula (2)
{Wherein A is the fabric length under no load, and B is the composite measured under 0.98N load with the composite yarn woven into the fabric length A under no load. The length of the thread. }, The elongation amount of the composite yarn is 1.3 to 2.5, and the fabric is stretched by 10% in the warp direction under the condition that it receives no external energy supply other than expansion and contraction. It was attached to an expansion / contraction tester (dematcher tester), then stretched by 20%, and then repeatedly expanded and contracted at a rate of 100 times / minute for 5 minutes. Thereafter, the fabric temperature at the time of 20% elongation at the 500th time is measured by thermography, and the instantaneous heat generation temperature calculated from the difference from the fabric temperature before the start of the test is 1.0 ° C. or more. Elastic fabric.
[2] The stretchable fabric according to [1], wherein the air permeability is 2.0 to 10.0 cc / cm ² / sec.
[3] A garment formed by using the elastic fabric according to [1] or [2] in close contact with the body.

  The elastic fabric of the present invention is a tops such as a shirt that fits the body, boots pants that fit the body from the knee up, and bottoms such as skinny pants that fit the entire leg. It is used, and it can be expected to prevent injuries by improving heat retention during operation and supporting functions.

Hereinafter, embodiments of the present invention will be described in detail.
The stretchable fabric of this embodiment is a fabric composed of a composite yarn of an inelastic yarn and an elastic yarn, and at the time of stretching the fabric, at least the instantaneous heat generation temperature in the warp direction is 1.0 ° C. or higher. .
In this specification, the term “instantaneous heat generation temperature” means that the fabric is stretched by 10% and attached to the stretch tester under conditions that do not receive external energy supply other than stretching and then stretched and relaxed by another 20%. After repeating the expansion / contraction with the step of returning to the original length once at a rate of 100 times / minute for 5 minutes, the fabric temperature at the time of 20% elongation at the 500th time was measured by thermography, before the start of the test. The value calculated from the difference from the fabric temperature.

  If the fabric temperature at the time of 20% elongation at the 500th time becomes higher than before the start of the test, it indicates that instantaneous heat is generated, and the elastic fabric of this embodiment has an instantaneous heat generation temperature of 1.0 ° C. or higher. is necessary. At an instantaneous heat generation temperature of less than 1.0 ° C., almost no heat generation is felt, the desired effect is not exhibited, and the instantaneous heat generation temperature is preferably 1.5 ° C. or higher. The higher the instantaneous heat generation temperature, the better. The upper limit is not particularly limited as long as it does not adversely affect the human body, but if the elastic yarn content is too high to increase the instantaneous heat generation temperature, the fabric becomes high power. It becomes difficult to move as clothes. In addition, the measuring method of exothermic temperature is hereafter demonstrated concretely in the Example column.

  Since the heat generated when the fabric is stretched is often stretched in the warp direction, it is necessary that at least the heat generation temperature when stretching in the warp direction is 1.0 ° C. or higher. Heating at 1.0 ° C. or more when extending in both directions is possible without worrying about the mold-insertion direction at the time of manufacturing the clothes, and it is preferable because the clothes are warm.

  The stretchable fabric of this embodiment has been achieved as a result of intensive studies on a fabric structure that generates heat when stretched even under low elongation. That is, in order to set the instantaneous heat generation temperature to 1.0 ° C. or higher, the effect of generating heat when the elastic yarn is stretched is sufficiently exerted, the friction in the fabric is caused by expansion and contraction, and the generated heat is released. It is necessary to create a difficult fabric structure.

More specifically, the stretchable fabric of the present embodiment is a fabric composed of a composite yarn of an inelastic yarn and an elastic yarn having a fineness of 250 to 500 dtex (decitex: hereinafter the same symbol is used) for both warp and weft. The spun yarn is used for at least the inelastic yarn of the weft, and the elastic yarn needs to be contained in the woven fabric at 15 to 30 g / m ² . As for the fineness of the composite yarn, if the fineness is thin, it becomes a soft woven fabric, but if it is too thin, the elastic yarn also becomes thin and the exothermic temperature at the time of elongation becomes low, and heat generation due to friction in the fabric can not be expected. . On the contrary, if the fineness of the composite yarn is thick, it is possible to use a thick elastic yarn, and heat generation due to friction in the fabric can be expected, but if it becomes too thick, it becomes a hard fabric and it becomes difficult to move when worn and uncomfortable clothes Therefore, the woven fabric is designed so that the fineness of the composite yarn of the non-elastic yarn and the elastic yarn is 250 to 500 dtex, preferably 300 to 450 dtex. As for the composite yarn of the inelastic yarn and the elastic yarn, it is preferable to use a spun yarn as at least the inelastic yarn of the weft. As a result, heat generation due to friction in the fabric during expansion and contraction can be expected. Of course, when both the warp and weft are composite yarns using spun yarn as inelastic yarn, the heat generation temperature during expansion / contraction is preferred, but a composite yarn in which the inelastic yarn is spun yarn is used only for warp. In the case of the woven fabric, the obvious cause is not known, but the heat generation effect due to friction is probably low, and the heat generation temperature during expansion and contraction of the fabric is low, which is not preferable.

Regarding the fineness of the composite yarn, a cotton count or the like is used in the case of a spun yarn, but the fineness is obtained by converting the dtex used in the case of a long fiber into a cotton count or the like.
The composite yarn can be produced by any method, and can be combined with elastic yarn, long fiber, spun yarn, one or more inelastic yarns. For example, twisting, FTY, SCY, DCY covering It is possible to use a method in which an elastic yarn is mixed with a spun yarn called air yarn, air-mixed yarn, or CSY at the time of production to form a composite yarn.
In the case of a composite yarn, the length ratio of the elastic yarn and the inelastic yarn can be arbitrarily set, but the length of the inelastic yarn is about 2.5 to 4.5 times the length of the elastic yarn. If the elastic yarn is stretched and used as a coated elastic yarn, the ratio of the length of the elastic yarn in the fabric to the length of the fabric can be easily set to 1.3 to 2.5.

In order to obtain a high exothermic temperature at the time of stretching, it is preferable that the elastic yarn content in the woven fabric is large. However, if the elastic yarn content is too large, the fabric becomes strong and becomes difficult to move when worn. for easy wearing time and motion content is low but the heat generation temperature becomes lower when extended, the content of the elastic yarn is required to be 15 to 30 g / m ^2.

  As a result of examining the heat generation effect of the stretchable fabric, the stretch fabric has a great influence on the elongation, and the fabric that stretches in both the warp direction and the weft direction is more stretchable than the fabric that stretches only in either the warp direction or the weft direction. It was found that the exotherm during elongation was high. This is because heat generation due to expansion and contraction of the elastic yarn and heat generation due to friction in the fabric are likely to occur, and these heat generation effects synergistically increase the heat generation temperature during elongation, and the fabric elongation also greatly affects the heat generation temperature. Also turned out. That is, the elongation in the warp direction and the weft direction under a load of 9.8 N is required to be 30 to 60%. If the elongation under a 9.8N load is less than 30%, the stretchability is poor, and an unpleasant garment that feels tense when worn. On the other hand, if it is larger than 60%, the clothes do not generate sufficient heat when stretched. This elongation adjustment includes adjustment of the fineness of the composite yarn, adjustment of the elongation rate (also referred to as draft rate) of the elastic yarn in the composite yarn, adjustment of the warp and weft density, adjustment of the elongation rate of the elastic yarn in the fabric, etc. This is possible by adjusting the width and adjusting the amount of chase during dyeing finishing.

Although related to the elongation of the woven fabric, in the stretchable woven fabric of the present embodiment, the density in the warp direction and the weft direction of the fabric also greatly affects the heat generation temperature during elongation, and the following formula (1):
Density ratio = (warp density) / (weft density) Formula (1)
If the density ratio required in the step is 1.2 to 1.8, the synergistic effect between the heat generation due to the expansion and contraction of the elastic yarn in the composite yarn and the heat generation due to friction in the fabric can be more easily exhibited. When the density ratio is less than 1.2 or greater than 1.8, the exothermic temperature during elongation decreases. The same applies to the case where the fineness of the composite yarn is greatly different between the warp and the weft, or the case of the weft having a different fineness. That is, the density ratio of the woven fabric needs to be 1.2 to 1.8, preferably 1.3 to 1.7, and in this case, the exothermic temperature at the time of elongation becomes the highest.

Following formula (2):
Composite yarn elongation = B / A Formula (2)
{In the formula, A is the fabric length under no load, and B is the composite yarn measured under 0.98N load after extracting the composite yarn woven into the fabric length A under no load. Is the length of }, The amount of elongation of the composite yarn in the woven fabric determined by the above also affects the exothermic temperature during elongation. That is, if the amount of elongation of the composite yarn is set to 1.3 to 2.5, the exothermic temperature at the time of elongation becomes high, and more preferably 1.4 to 2.4. The amount of the composite yarn can be adjusted by adjusting the fabric density and the elastic yarn elongation rate in the composite yarn. To increase the amount of composite yarn, increase the fabric density and stretch the elastic yarn in the composite yarn. You can increase the rate. By setting the amount of elongation of the composite yarn and the elongation of the woven fabric within a predetermined range, high heat generation during elongation can be obtained.

In the stretchable fabric of this embodiment, the heat generation during elongation is large due to the expansion and contraction of the elastic yarn in the fabric, but the heat generation due to friction in the fabric also contributes, and the heat generation due to this friction may be related to the breathability of the fabric. found.
That is, the woven fabric may be designed so that the air permeability of the woven fabric is ² to 10 cc / cm ² / sec. If the air permeability is less than ² cc / cm ² / sec, the fabric has a hard texture, and the air permeability is 10 cc / cm ² / sec. If it is longer than sec, the heat generation effect at the time of elongation is lowered, which is not preferable. Therefore, the fineness of the composite yarn, the fabric density, etc. may be adjusted so that the air permeability of the fabric is ^{2 to} 10 cc / cm ² / sec.

  The elastic yarn used for the composite yarn of the stretchable fabric of the present embodiment is preferably 30 to 130 dtex, more preferably 40 to 110 dtex. As the elastic yarn becomes thicker, the heat generation effect at the time of elongation can be exhibited. If it is thinner than 30 dtex, the heat generation effect is small. On the other hand, if it is thicker than 130 dtex, the stretch force becomes too large, and the clothes become uncomfortable and difficult to move due to a strong feeling of tension when worn. Even when a plurality of elastic yarns having different finenesses are used, the fineness of the elastic yarns is preferably in the above range.

  As the elastic yarn, polyurethane-based or polyether ester-based elastic yarn, for example, polyurethane-based elastic yarn can be used by dry spinning or melt spinning, and the polymer and spinning method are not particularly limited. The breaking elongation of the elastic yarn is preferably about 400% to 1000%, and is preferably an elastic yarn that is excellent in stretchability and does not impair the stretchability at around 180 ° C., which is a normal processing temperature in the presetting process during dyeing. Moreover, what added functionality, such as high set property, antibacterial property, moisture absorption, and water absorption, can be used by adding a special polymer and powder to an elastic yarn.

  In the stretchable fabric of the present embodiment, the elastic yarn can contain an inorganic substance, and the fabric can be made in consideration of the performance of the contained inorganic substance. For example, when titanium oxide is contained, the heat generated by the fabric can be stored in titanium oxide, and heat retention due to the far-infrared effect can be imparted. Regarding the method of containing an inorganic substance, the simplest method is to add an inorganic substance to a spinning dope for elastic yarn and perform spinning. Inorganic substances are ceramics such as titanium oxide, inorganic substances such as carbon and carbon black, and inorganic compounds, and are preferably finely powdered so as not to hinder spinning of elastic yarns. These inorganic substances are preferably contained in the elastic yarn in an amount of 1 to 10% by weight. By containing the inorganic substance, the heat retention effect can be more effectively exhibited when the woven fabric stretches and generates heat. If the inorganic substance is small, the heat retention effect is small, and if it is too large, the yarn may break during spinning or stretching. .

  Examples of the inelastic yarn constituting the stretchable fabric of the present embodiment include polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate, polyamide fibers, polyolefin fibers such as polypropylene, and cupra, rayon, cotton, bamboo fibers. Long fibers or short fibers such as cellulosic fibers such as wool and animal fibers such as wool can be used. If a material that absorbs moisture by heat, such as cellulose, is used as the non-elastic yarn, it generates heat by absorbing moisture when worn, and also generates heat when exercised, so that the heat generation effect can be enhanced. In addition, the use of spun yarn and raising can make it difficult for heat generated to escape and enhance the heat retaining effect.

  Polyester fiber, polyamide fiber, cellulosic fiber and the like preferably also contain 0.3 to 5% by weight of an inorganic substance. By containing an inorganic substance, the heat-insulating effect can be further improved when the elastic fabric is heated. It becomes possible to demonstrate effectively. If the amount of the inorganic substance is small, the heat retaining effect is small. If the amount is too large, the yarn may break during spinning or stretching. Therefore, the content is preferably 0.5 to 5% by weight, more preferably 0.4 to 3% by weight. It is inclusion of. Bright fibers, semi-dal yarns, full-dal yarns, etc. of these fibers can also be used arbitrarily, and fibers having an arbitrary cross-sectional shape such as round, elliptical, W-shaped, saddle-shaped, hollow fiber can be used. Is possible. The fineness of the inelastic yarn is not particularly limited, but if it is about 100 to 400 dtex, the product has a soft texture when worn.

The structure of the stretchable woven fabric of the present embodiment is arbitrary such as taffeta, twill, satin, jacquard structure, and the use of these changed structures is also possible.
The method for dyeing and finishing the stretchable fabric of the present embodiment may be any of a method of dyeing with inelastic yarn only, a method of dyeing as a composite yarn, or a method of dyeing as a fabric, and any method uses a normal dyeing finishing process. The dyeing conditions can be set according to the fiber material to be used, and the dyeing machine to be used is optional, such as a liquid dyeing machine, a wins dyeing machine, a paddle dyeing machine, and an overmeier dyeing machine.

  Processing agents that improve water absorption and flexibility can be used, but silicone processing agents have a high thread sliding effect and a low heat generation effect when stretched. It is preferable to use a non-silicone finishing agent such as a system, or make a product without using a finishing agent.

  The stretchable fabric of the embodiment can be used for clothes such as shirts and bottoms such as pants with a soft stretch feeling, and can also be used as a supporter that is in close contact with the body covering the joints. It is possible to provide a garment product that can be expected to prevent injuries due to warming of the muscles and joints of the stretched part and to have a fat burning effect.

EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited only to these Examples. In addition, the elastic fabric in the Examples and the manufactured clothes were evaluated by the following methods.
(1) Instantaneous exothermic temperature The instantaneous exothermic temperature is measured by stretching the fabric by 10% under the condition that it receives no external energy supply in addition to stretching in the warp direction of the fabric and attaches it to the stretch tester (dematcher tester). Then, after further stretching and stretching for 20% at a rate of 100 times / minute for 5 minutes, the temperature of the fabric at the time of 20% stretching for the 500th time Is measured by thermography and calculated from the difference from the fabric temperature before the start of the test.
Extension tester: Dematcher tester (manufactured by Daiei Scientific Instruments).
Sample size: length 10 cm (excluding gripping part), width 6 cm.
Measurement environment: constant temperature and humidity conditions of temperature 20 ° C. and humidity 65% RH. Measured with no external energy supply other than expansion and contraction.
Repeated expansion / contraction cycle: 100 times / minute Exothermic temperature measurement: Sample surface temperature at the time of predetermined extension at the 100th extension is measured by thermography. The emissivity of the thermography is set to 1.0.
Exothermic temperature evaluation: Read the maximum surface temperature of the sample to be measured, calculate how many degrees the temperature rose compared to before stretching, and round off the second decimal place to obtain the instantaneous exothermic temperature.

(2) Elastic yarn content The elastic yarn content (g / m ² ) in the woven fabric is determined by the following method, and the decimal point is rounded off.
After measuring the weight and area of a woven fabric (about 10 cm × 10 cm square in the example) conditioned for 24 hours or more in an environment of 20 ° C. and 65% RH, the inelastic yarn in the woven fabric is removed by dissolution, etc. Measure and convert the weight of the wet elastic yarn only. When the non-elastic yarn cannot be removed by dissolution or the like, the elastic yarn is extracted from the woven fabric after the weight measurement, and the elastic yarn content is measured by measuring the weight of the elastic yarn.

(3) Fabric elongation The fabric elongation is measured by the following method.
Sample size: length 100 mm (excluding gripping part), width 25 mm.
Tensile tester: Tensilon tensile tester.
Initial load: 0.1N.
Tensile speed: 300 mm / min.
Tensile length: Elongates to 9.8N load.
Measurement: Elongation under the above conditions, warp direction elongation or weft direction elongation at 9.8 N load is obtained by the following formula, and the decimal point is rounded off to obtain the fabric elongation.
Textile elongation (%) = (9.8 N length under load (mm) / 100) × 100

(4) Density ratio Marks at intervals of 2.54 cm in the weft of fabric conditioned for 24 hours or more in an environment of 20 ° C. and 65% RH, reads the number of weft yarns between the marks with a loupe, The weft density (main / 2.54 cm). Using the warp density and the weft density thus determined, the following formula (1):
Density ratio = (warp density) / (weft density) Formula (1)
To round off the second decimal place to obtain the density ratio.

(5) Composite yarn elongation amount Place a woven fabric that has been conditioned for at least 24 hours in an environment of 20 ° C. and 65% RH on a desk, and mark the position where the fabric length is A under no load. In the present example, a position where A = 30 cm is marked. B: Length of the composite yarn woven in the fabric length A under no load under an environment of 20 ° C. and 65% RH from the fabric and marked with the composite yarn under a load of 0.98 N Measure with a ruler. The average value obtained by measuring 10 composite yarns extracted from the fabric is defined as B.
A and B thus obtained are expressed by the following formula (2):
Composite yarn elongation amount = (B / A) × 100 (%) Equation (2)
And the second digit after the decimal point was rounded off to obtain the amount of elongation of the composite yarn.

(6) Breathability A fabric conditioned for 24 hours or more in an environment of 20 ° C. and 65% RH is cut into a size of 30 cm × 30 cm and measured according to JIS L1096 Breathability Frazier method.
In addition, the obtained numerical value rounds off the first digit of the decimal point to make it breathable.

(7) Wearing feeling Using the stretch fabric obtained in the examples, a stretch pant that fits the entire leg is sewn, worn in an environmental test room at 15 ° C. and 50% RH, and a speed of 4 km / min on a treadmill. After walking for 10 minutes, warmth and texture (harshness, stiffness) are as follows:
○: The whole pants such as knees, buttocks, and thighs feel warm, the feeling of firmness and firmness is moderate, the feeling of wearing is good, and it is easy to move;
Δ: The portion where the knee and buttocks stretch repeatedly is warm, firm and firm, and easy to move;
X: It does not feel warmth or is uncomfortable due to difficulty in movement;
It was evaluated with. ○ and △ were regarded as acceptable.

[Example 1]
An elastic yarn of 44 dtex that was stretched three times during the spinning process of cotton dyed as a composite yarn was inserted to produce a composite yarn of 340 dtex as CSY. This composite yarn was wound around a beam, set on a loom, and placed in a 33 / inch kite with 2 pcs / feather. The weft is the same composite yarn, weaved in a 2/1 twill structure and weaved under the conditions of 54 wefts / inch, then scoured with a continuous scourer, then finished and set at 185 ° C for 1 minute to stretch fabric Got.
The evaluation results of the resulting stretchable fabric are shown in Table 1 below.

[Examples 2 and 3, Comparative Example 1]
In Example 1, a fabric (Example 2) with a weft punching density of 50 / inch, a fabric with 58 (Example 3), and a fabric with 37 / inch (Comparative Example 1). Manufactured and finished as in Example 1.
The evaluation results of the resulting stretchable fabric are shown in Table 1 below.

[Examples 4 and 5]
Inserting an elastic yarn of 78 dtex, which was stretched 3 times during the spinning process of cotton dyed as a composite yarn, produced a 450 dtex composite yarn as CSY, and replaced the weft yarn produced in Example 1 with this CSY as the weft. Thus, a woven fabric was manufactured under conditions of 40 wefts per inch (Example 4). In addition, a woven fabric with a weft threading density of 45 yarns / inch was also manufactured (Example 5).
The evaluation results of the resulting stretchable fabric are shown in Table 1 below.

[Example 6]
A composite yarn of 240 dtex, in which 165 dtex of polyester 2 heater-processed yarn is wrapped around a stretched 78 dtex elastic yarn under a condition of 800 T / m, is wound on a beam as a warp and set in a loom. A taffeta-textured fabric was manufactured using a composite yarn of CSY 340 dtex produced in Example 1 at a rate of 54 yarns / inch. The obtained woven fabric was relaxed and scoured with a continuous scouring machine, then pre-set at 185 ° C. for 1 minute, and then dyed with a liquid dyeing machine. After dyeing, a soft finish was padded and a finishing set was performed at 160 ° C. for 1 minute to obtain an elastic fabric.
The evaluation results of the resulting stretchable fabric are shown in Table 1 below.

[Comparative Example 2]
A fiber of 220 dtex, in which a polyester 2 heater processed yarn of 165 dtex is wound around an elastic yarn of 3 times stretched at 3 times under the condition of 800 T / m, is wound on a beam as a warp and set in a loom, and 40 pcs / inch A taffeta-woven fabric was produced with a number of 70 pieces / inch by using the same composite yarn as the warp.
The evaluation results of the resulting stretchable fabric are shown in Table 1 below.

  The stretch fabric of the present invention is a fabric that instantaneously generates heat when stretched, and using this, clothing products that can be expected to have heat retention and prevention of injury due to warming muscles and joints of the stretched part, and fat burning effect, for example, , Shirts and tights.

Claims (3)

In both the warp and the weft, in a stretchable fabric made of a composite yarn of an inelastic yarn and an elastic yarn having a fineness of 250 to 500 dtex, at least the inelastic yarn of the weft is a spun yarn, and the fabric has an elastic yarn. It is contained at 15 to 30 g / m ² , and the elongation rate in the warp direction and the weft direction under a 9.8 N load of the woven fabric is 30 to 60%, and the following formula (1):
Density ratio = (warp density) / (weft density) Formula (1)
Is a ratio of 1.2 to 1.8, and both the warp and the weft are represented by the following formula (2):
Composite yarn elongation amount = B / A Formula (2)
{Wherein A is the fabric length under no load, and B is the composite measured under 0.98N load with the composite yarn woven into the fabric length A under no load. The length of the thread. }, The elongation amount of the composite yarn is 1.3 to 2.5, and the fabric is stretched by 10% in the warp direction under the condition that it receives no external energy supply other than expansion and contraction. It was attached to an expansion / contraction tester (dematcher tester), then stretched by 20%, and then repeatedly expanded and contracted at a rate of 100 times / minute for 5 minutes. Thereafter, the fabric temperature at the time of 20% elongation at the 500th time is measured by thermography, and the instantaneous heat generation temperature calculated from the difference from the fabric temperature before the start of the test is 1.0 ° C. or more. Elastic fabric. The stretchable woven fabric according to claim 1, wherein the air permeability is 2.0 to 10.0 cc / cm ² / sec.   A garment made by using the stretchable fabric according to claim 1 in close contact with the body.