JP2020169401A - Stretchable woven fabric and clothing containing the same - Google Patents

Abstract

To provide a woven fabric which contains an elastic yarn only in one of warp and weft, and has a high instantaneous exothermic temperature when stretched in one direction, and to provide clothing containing the same.SOLUTION: In a stretchable woven fabric, only one of warp and weft is a composite yarn composed of a non-elastic yarn and an elastic yarn, and the other yarn is a yarn which does not contain an elastic yarn. A fineness of the composite yarn is 100 to 700 dtex. The fabric contains 5 to 30 g/m2 of the elastic yarn, and an elongation of the fabric in the direction of the elastic yarn is 20 to 60% at a 9.8 N load. In the direction of the elastic yarn in the fabric, the fabric has a composite yarn extension efficiency of 0.4 to 1.0 represented by the following formula (1) : (1) composite yarn extension efficiency={A×(D-B)}/{B×(C-A)}, where A, B, C, and D are defined in the claims.SELECTED DRAWING: Figure 1

Description

The present invention relates to elastic woven fabrics and garments containing the woven fabrics.

Conventionally, as clothes such as heat-retaining clothes whose temperature rises when worn, clothes made of a cloth mixed with moisture-absorbing heat-generating fibers such as cellulose and generating heat by insensitive evaporation or sweating from the human body when worn are known (for example). , See Patent Document 1 below). However, in these moisture-absorbing heat-generating fibers, the heat generation time is short, and when the moisture absorption amount of the fiber reaches saturation, no further heat is generated, and after the moisture absorption amount reaches saturation, it is cooled by the moisture in the fiber. You may even feel a feeling.

Further, Patent Documents 2 and 3 below also propose a woven fabric that generates heat during elongation in a woven fabric containing elastic yarn. The woven fabric described in Patent Document 2 is a woven fabric suitable for a strong supporter or the like having an elongation rate of 60 to 150% in each of the warp direction and the weft direction under a load of 9.8 N. Further, the woven fabric described in Patent Document 3 has a soft stretch feeling of 30 to 60% in each of the warp direction and the weft direction under a load of 9.8 N, such as tops such as shirts and bottoms such as pants. It is a woven fabric suitable for clothes. All of these woven fabrics are woven fabrics containing elastic threads in both warp and weft threads.

Clothes are often stretched in the product warp direction, but in the case of tops and bottoms products that are in close contact with the body, they also stretch significantly in the product weft direction when the arms and legs are bent. Therefore, when the heat generation temperature at the time of extension in either the warp direction or the weft direction is 1.0 ° C. or higher, the garment feels warm. Of course, it is preferable to generate heat of 1.0 ° C. or higher during elongation in both the warp and weft directions because it is warmer when wearing clothes, but when the fabric is stretched in both the warp and weft directions, the fabric shrinks in both the warp and weft directions. Therefore, it tends to be a thick and heavy fabric. In other words, an elastic woven fabric that uses elastic threads in only one of the warp and weft directions has an instantaneous heat generation temperature of 1. compared to an elastic woven fabric that uses elastic threads in both the warp and weft directions. It is difficult to keep the temperature above 0 ° C.
As described above, woven fabrics containing elastic yarns in only one of the warp yarns and the weft yarns, in which the temperature during wearing rises and the woven fabric generates heat permanently as long as the wearing exercise is carried out, are known to date. Not.

Japanese Unexamined Patent Publication No. 2003-227043 Japanese Unexamined Patent Publication No. 2014-152425 JP-A-2017-190532

In view of the above-mentioned problems of the prior art, the problem to be solved by the present invention is a woven fabric containing elastic yarn in only one of the warp yarn and the weft yarn, and the woven fabric has a high instantaneous heat generation temperature at the time of stretching in one direction. , And garments containing it.

As a result of diligent studies and repeated experiments in order to solve the above problems, the present inventors have made a composite yarn of an inelastic yarn and an elastic yarn into a stretchable yarn containing an elastic yarn only in either the warp direction or the weft direction. We have unexpectedly found that the problem can be solved by efficiently stretching the composite yarn when it is stretched in one direction, and have completed the present invention.

That is, the present invention is as follows.
[1] Only one of the warp and the weft is a stretchable woven fabric in which a composite yarn of an inelastic yarn and an elastic yarn and the other is a yarn not containing an elastic yarn, and the fineness of the composite yarn is , 100-700 dtex, the woven fabric contains elastic yarn at 5 to 30 g / m ² , and the elongation rate of the woven fabric in the direction containing the elastic yarn under a 9.8 N load is 20 to 60%. In the direction including the elastic yarn of the woven fabric, the following formula (1):
Composite yarn elongation efficiency = {A × (DB)} / {B × (CA)} (1)
{In the formula, A is the fabric length of 10 yarns not including the elastic yarn in the cross section in the direction of the composite yarn of the inelastic yarn and the elastic yarn of the woven fabric under no load, and B is the fabric length of the yarn. The length of the composite yarn woven in the range of the fabric length A in the cross section, and C is the elasticity of the woven fabric in the cross section when the fabric is stretched under a 9.8 N load in the direction including the composite yarn. It is the fabric length of 10 yarns containing no yarn, and D is the length of the composite yarn woven into the fabric length C in the cross section. } Is a stretchable woven fabric having a composite yarn elongation efficiency of 0.4 to 1.0.
[2] The woven fabric is attached to a stretch tester without stretching under the condition that it does not receive an external energy supply other than stretching, then stretched by 20% in the direction containing the elastic yarn of the woven fabric, and then relaxed. After repeating expansion and contraction at a rate of 100 times / minute for 5 minutes, the temperature of the woven fabric at the time of the 500th 20% elongation was measured by thermography, and the woven fabric before the start of the test was performed. The elastic woven fabric according to the above [1], wherein the instantaneous heat generation temperature calculated from the difference from the temperature is 1.0 ° C. or higher.
[3] The elastic woven fabric according to the above [1] or [2], wherein the weft is a composite yarn of an inelastic yarn and an elastic yarn.
[4] The stretchable woven fabric according to any one of [1] to [3] above, which has a breathability of 2.0 to 10.0 cc / cm ² / sec.
[5] The stretchable woven fabric according to any one of [1] to [4] above, wherein the woven fabric has a 2/1 twill, a 3/1 twill, or a 4/1 twill.
[6] Clothing containing the elastic woven fabric according to any one of the above [1] to [5].
[7] The garment according to the above [6], which is used in close contact with the body.

The stretchable woven fabric of the present invention is a thin, lightweight, and highly productive woven fabric that contains elastic threads in only one of the warp threads and the weft threads, and yet has a soft texture. The temperature rises, and even if expansion and contraction are repeated, heat is permanently generated during expansion and contraction. Therefore, the garment containing the woven fabric is useful as a garment material and can be suitably used because the temperature at the time of wearing rises and the heat is permanently generated as long as the wearing exercise is performed.

It is sectional drawing of the stretchable woven fabric of plain weave which is one aspect of this Embodiment. It is sectional drawing of the elastic woven fabric of twill weave which is one aspect of this Embodiment. In this cross-sectional view, the composite yarn bending degree f is small. This is an example of a cross-sectional view of a twill-woven elastic woven fabric, which is a conventional technique. In this cross-sectional view, the composite yarn bending degree f is large.

Hereinafter, embodiments of the present invention will be described in detail.
The elastic woven fabric of the present embodiment is a woven fabric in which only one of the warp and the weft is a composite yarn of an inelastic yarn and an elastic yarn, and the other is a yarn not containing an elastic yarn.
If the fineness of the composite yarn is thin, the woven fabric will have a soft texture, but if it is too thin, the elastic yarn will also be thin and the heat generation temperature during elongation will be low. On the contrary, if the fineness of the composite yarn is thick, a thick elastic yarn can be used and the heat generation temperature during elongation becomes high, but if it becomes too thick, the fabric becomes hard and becomes difficult to move when worn, resulting in an unpleasant woven fabric. From the above viewpoint, the fineness of the composite yarn of the inelastic yarn and the elastic yarn is 100 to 700 dtex (decitex: the same symbol is used hereinafter), preferably 250 to 500 dtex. Regarding the fineness of the composite yarn, a constant weight type count such as a cotton count is usually used in the case of spun yarn, but the fineness is obtained by converting the constant weight type count into the dtex used in the case of long fibers.

As the "composite yarn", an elastic yarn and at least one kind of inelastic yarn selected from the group consisting of long fibers, short fibers, spun yarns and those can be composited, for example, composite twisted yarns and coverings. Composite yarns (called CSY) produced by mixing elastic yarns with yarns (referred to as FTY, SCY, DCY), air-blended yarns, and spun yarns can be used.

The "thread not containing elastic threads" constituting the elastic woven fabric of the present embodiment is not particularly limited, but a fineness of about 100 to 400 dtex is preferable because the product has a soft texture when worn.

In the present specification, the term "elastic yarn" refers to a fiber having a breaking elongation of 100% or more. The fineness of the elastic yarn used for the composite yarn of the elastic woven fabric of the present embodiment is preferably 30 to 130 dtex, more preferably 40 to 110 dtex. The thicker the elastic thread, the more heat-generating effect can be exhibited during stretching. On the other hand, if the fineness is 130 dtex or less, the stretchable force is appropriate, and the woven fabric is easy to move and comfortable with less tension when worn. Even when a plurality of elastic yarns having different finenesses are used, it is preferable that the fineness of the elastic yarns is in the above range.
Further, as the elastic yarn, a polyurethane-based or polyether ester-based elastic yarn, for example, as the polyurethane-based elastic yarn, a dry-spun or melt-spun yarn can be used, and the polymer and the spinning method are not particularly limited.
The breaking elongation of the elastic yarn is preferably about 400% to 1000%, and the elastic yarn is excellent in elasticity and does not impair the elasticity at the normal treatment temperature of around 180 ° C. in the presetting step during the dyeing process. In addition, by adding a special polymer or powder to the elastic yarn, it is possible to use a yarn having functionality such as high settability, antibacterial property, moisture absorption, and water absorption.

In the present specification, the term "inelastic yarn" refers to a fiber having a breaking elongation of less than 100%. Examples of the inelastic yarn include polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, polyolefin fibers such as polypropylene, and cellulose such as cupra, rayon, cotton and bamboo fiber. Long fibers or short fibers such as system fibers and animal hair fibers such as wool can be used. In addition, bright yarn, semi-dull yarn, full-dull yarn, etc. of these fibers can be arbitrarily used, and fibers having any cross-sectional shape such as round, oval, W-shaped, cocoon-shaped, hollow yarn, etc. can be used. It is possible. If a material that absorbs heat and absorbs heat, such as cellulose, is used as the inelastic yarn, heat is generated by absorbing moisture when worn, and heat is also generated by exercising, so that the heat generation effect can be further enhanced. In addition, the use of spun yarn and raising of the yarn make it difficult for the heat generated to escape, and the heat retention effect can be enhanced. Further, the use of spun yarn is preferable because heat generation due to friction in the fabric during expansion and contraction can be expected.

The elastic woven fabric of the present embodiment needs to contain elastic yarn at 5 to 30 g / m ² in the woven fabric, preferably 5 to 20 g / m ² . In order to obtain a high heat generation temperature at the time of elongation, it is preferable that the content of the elastic yarn in the woven fabric is high, but if the content of the elastic yarn is too large, the woven fabric becomes strong and difficult to move when worn, and is heavy. On the other hand, if the content of elastic yarn is low, the woven fabric feels easy to move when worn, but the heat generation temperature during elongation becomes low.

In the stretchable woven fabric of the present embodiment, it is important to increase the stretching efficiency of the composite yarn including the elastic yarn when the woven fabric is stretched, and the following formula (1):
Composite yarn elongation efficiency = {A × (DB)} / {B × (CA)} (1)
{In the formula, A is the fabric length of 10 yarns not including the elastic yarn in the cross section in the direction of the composite yarn of the inelastic yarn and the elastic yarn of the woven fabric under no load, and B is the fabric length in the cross section. The length of the composite yarn woven in the range of the fabric length A, and C is the yarn not containing the elastic yarn when stretched under a 9.8 N load in the direction including the composite yarn of the woven fabric in the cross section. It is the fabric length for 10 yarns, and D is the length of the composite yarn woven into the fabric length C in the cross section. }
The compound yarn elongation efficiency represented by is affected by the heat generation temperature during elongation.
That is, if the composite yarn elongation efficiency is set to 0.4 to 1.0, the heat generation temperature during elongation becomes high, more preferably 0.7 to 1.0. In the elastic woven fabric of the present embodiment, by bringing the composite yarn elongation efficiency close to 1.0, even a woven fabric containing elastic yarns in only one direction can be made into a garment that feels warmth. The elongation efficiency of the composite yarn can be adjusted by the woven fabric structure, the elongation rate of the elastic yarn in the composite yarn, the tension of the warp or weft yarn at the time of weaving, and the width adjustment at the time of dyeing finish processing. Specifically, when producing a composite yarn, the elastic yarn is stretched so that the elastic yarn length is preferably about 3.1 to 4.5 times the length of the elastic yarn in a no-load state. By winding the inelastic yarn or covering it with the inelastic yarn in the spinning process, it becomes easy to adjust the elongation efficiency of the composite yarn to 0.4 to 1.0. Further, by setting the warp tension at the time of weaving to be low and the weft tension to be high, it becomes easy to adjust the composite yarn elongation efficiency within a desired range. By setting a large finish width at the time of dyeing finish, it becomes easy to set the composite yarn elongation efficiency within a desired range. In a woven fabric containing elastic yarn in the weft, the tension at the time of driving the weft is often set low in order to improve the stretch feeling, but in the present embodiment, the tension is set high. The elastic thread can be efficiently expanded and contracted by the expansion and contraction of the woven fabric. Also, in the finishing process, the finishing width is often set small in order to improve the stretchability, but in the present embodiment, by intentionally setting the finishing width large, the elastic yarn becomes efficient due to the expansion and contraction of the woven fabric. Can expand and contract well.

In the present specification, the term "instantaneous heat generation temperature" means that a woven fabric is stretched by 10% in a direction including elastic threads under the condition that no external energy is supplied other than expansion and contraction, and then attached to an expansion and contraction tester, and then further. After repeating expansion and contraction at a rate of 100 times / minute for 5 minutes with one step of stretching and relaxing by 20% and returning to the original length, the textile temperature at the time of the 500th 20% stretching is thermographically measured. It is a value calculated from the difference from the woven fabric temperature before the start of the test.
In the elastic woven fabric of the present embodiment, if the woven fabric temperature at the time of the 500th 20% elongation is higher than that before the start of the test, it indicates that instantaneous heat generation is performed, and the elastic woven fabric of the present embodiment has this instantaneous heat generation temperature. Is preferably 1.0 ° C. or higher. If the instantaneous heat generation temperature is 1.0 ° C. or higher, the heat generation can be sufficiently felt. The instantaneous heat generation temperature is preferably 1.5 ° C. or higher. The higher the instantaneous heat generation temperature is, the more suitable it is, and the upper limit is not particularly limited as long as it does not adversely affect the human body. However, if the elastic yarn content is too high in order to raise the instantaneous heat generation temperature, the woven fabric becomes high power. It becomes difficult to move as clothes. The method for measuring the exothermic temperature will be specifically described in Examples described later.

In the stretchable woven fabric of the present embodiment, the heat generated during stretching is large due to the expansion and contraction of the elastic threads in the woven fabric, but the heat generated by the friction in the woven fabric also contributes, and the heat generated by this friction increases as the air permeability of the woven fabric decreases. .. It is preferable to design the woven fabric so that the air permeability of the stretchable woven fabric of the present embodiment is ^{2 to} 10 cc / cm ² / sec. When the air permeability is ² cc / cm ² / sec or more, the fabric has a soft texture, while when the air permeability is 10 cc / cm ² / sec or less, a sufficient heat generation effect during elongation can be obtained. In order to make the air permeability ² to 10 cc / cm ² / sec, the fineness of the composite yarn, the woven fabric density and the like may be appropriately adjusted.

The structure of the stretchable woven fabric of the present embodiment is arbitrary such as taffeta, twill, satin, and jacquard structure, but these modified structures can also be used. However, from the viewpoint of increasing the instantaneous heat generation temperature, the woven fabric structure is preferably a twill structure such as 2/1 twill, 3/1 twill, or 4/1 twill rather than a plain weave system such as 1/1 taffeta. The reason for this is that by using the twill structure, the degree of bending of the composite yarn, which will be described later, is within an appropriate range, the elongation efficiency of the composite yarn is increased, and as a result, the instantaneous heat generation temperature is increased.

From the viewpoint of making the woven fabric of the present embodiment easy to move and warm, it is preferable that the elongation under load of 9.8 N in the warp direction or the weft direction of the cloth is 20 to 60%. If the elongation under a load of 9.8 N is 20% or more, the woven fabric has sufficient elasticity and is comfortable to wear without feeling a feeling of tension. On the other hand, if the elongation under a load of 9.8 N is 60% or less, the woven fabric generates sufficient heat during elongation. The adjustment of the elongation under a 9.8 N load includes the fineness of the composite yarn, the elongation rate of the elastic yarn in the composite yarn (also called the draft ratio), the warp and weft density, and the elongation ratio of the elastic yarn in the woven fabric. , It is possible by adjusting the width and the amount of driving during dyeing finish processing.

The elastic woven fabric of this embodiment has the following formula (2):
Composite yarn bend = f / A (2)
{In the formula, A is the fabric length of 10 yarns containing no elastic yarn in the cross section in the direction of the composite yarn of the inelastic yarn and the elastic yarn of the woven fabric under no load, and f is The degree of bending of the composite yarn represented by}, which is the average bending width of the composite yarn in the range of the fabric length A in the cross section, is set to 0.10 to 0.23, preferably 0.19 to 0.22. As a result, the elongation efficiency of the composite yarn can be increased. When the bending degree of the composite yarn is 0.23 or less, the elongation efficiency of the composite yarn is high, which is preferable. On the other hand, when the bending degree of the composite yarn is 0.10 or more, the woven fabric has an excellent stretch feeling, which is preferable. In most cases, the degree of bending of the composite yarn in a general stretchable woven fabric is larger than 0.23, and it is difficult to obtain the desired elongation efficiency of the composite yarn.

In order to set the degree of bending of the composite yarn within a desired range, a twill structure system such as 2/1 twill, 3/1 twill, or 4/1 twill is used as described above, or the elongation rate of the elastic yarn in the composite yarn is set. It is preferable to increase the (draft rate), adjust the tension of the composite yarn containing the elastic yarn to be high during weaving, and adjust the tension of the yarn not containing the elastic yarn to be low. In particular, when the weft contains an elastic yarn, by setting a large finishing width at the time of dyeing finish processing, the weft is easily stretched in the woven fabric, and the degree of bending of the composite yarn is likely to be within a desired range. On the other hand, when the warp yarn contains an elastic yarn, it is easy to obtain a desired degree of bending of the composite yarn by setting the fabric tension at the time of dyeing finish to be high.

In the elastic woven fabric of the present embodiment, the elastic yarn or the inelastic yarn can contain an inorganic substance, and the woven fabric can be made in consideration of the performance of the contained inorganic substance. For example, when titanium oxide is contained, heat retention due to the far-infrared effect can be imparted. As for the method of containing an inorganic substance, the method of spinning by adding an inorganic substance to a spinning stock solution of an elastic yarn is the simplest. The inorganic substance is a ceramic such as titanium oxide, an inorganic substance such as carbon or carbon black, or an inorganic compound, and is preferably in the form of a fine powder so as not to interfere with the spinning of elastic yarn. It is preferable that the elastic yarn contains 1 to 10% by weight of these inorganic substances, and by containing the inorganic substance, it is possible to more effectively exert the heat retaining effect at the time of elongation heat generation of the woven fabric. If the amount of the inorganic substance is small, the heat retaining effect is small, and if it is too large, the yarn may break during spinning or elongation. Therefore, the content is preferably 1 to 10% by weight, more preferably 2 to 5% by weight. ..

The method for dyeing and finishing the stretchable woven fabric of the present embodiment may be any of a method of dyeing only with inelastic yarn, a method of dyeing as a composite yarn, and a method of dyeing as a woven fabric, and a normal dyeing and finishing step is used in any of the methods. The dyeing conditions can be set according to the fiber material to be used, and the dyeing machine to be used is arbitrary, such as a liquid flow dyeing machine, a wins dyeing machine, a paddle dyeing machine, and an overmeyer dyeing machine.
It is possible to use a processing agent that improves water absorption and flexibility, but since silicon-based processing agents have a high thread slipping effect and a low heat generation effect during elongation, polyester is used to reduce the thread slipping effect. It is preferable to use a non-silicone finish such as a system, or to make a product without using a finish.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples. The elastic woven fabric and the manufactured clothes in the examples were evaluated by the following methods.

(1) Extract the woven composite yarn from a woven fabric or clothing product that has been conditioned for 24 hours or more in an environment with a fineness of 20 ° C. and 65% RH, apply an initial load of 0.1 g, and take 20 samples of 90 cm in length and mass. Is measured, the fineness (dtex) is calculated by the following formula, and the first digit after the decimal point of the average value of the two times is rounded off to obtain the fineness.
Fineness (dtex) = 1000 x sample weight (g) / sample length (m)

(2) Instantaneous heat generation temperature The instantaneous heat generation temperature is measured by stretching the woven fabric in the length direction of the composite yarn of the inelastic yarn and the elastic yarn under the following conditions and under the condition that the woven fabric is not supplied with external energy other than expansion and contraction. It is attached to a machine (dematcher tester), stretched by 20%, relaxed, and then repeatedly stretched and contracted once for 5 minutes at a rate of 100 times / minute, and then the 500th 20th. % The woven fabric temperature at the time of elongation is measured by thermography and calculated from the difference from the woven fabric temperature before the start of the test.
Expansion and contraction tester: Dematcher tester (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.).
Sample size: 10 cm in length (excluding grip), 6 cm in width.
Measurement environment: Constant temperature and humidity conditions with a temperature of 20 ° C and a humidity of 65% RH. A state in which energy is not supplied from the outside other than expansion and contraction.
Repeated expansion and contraction cycle: 100 times / minute.
Heat generation temperature measurement: The sample surface temperature at the time of the 100th repeated stretching is measured by thermography. The emissivity of the thermography is set to 1.0.
Heat generation temperature evaluation: Read the maximum surface temperature of the sample to be measured, calculate how much the temperature has risen compared to before expansion and contraction, and round off the second digit after the decimal point to obtain the instantaneous heat generation temperature.

(3) Elastic yarn content The elastic yarn content (g / m ² ) in the woven fabric is obtained by the following method and rounded off to the first decimal place.
After measuring the weight and area of the woven fabric (a square of about 10 cm × 10 cm in the example) whose humidity was controlled for 24 hours or more in an environment of 20 ° C. and 65% RH, the inelastic threads in the woven fabric were removed by melting or the like. , Measure and convert the weight of only the re-humidified elastic yarn. If the inelastic yarn cannot be removed by melting or the like, the elastic yarn is extracted from the woven fabric after the weight measurement, and the weight of the elastic yarn is measured to measure the elastic yarn content.

(4) Woven fabric elongation The woven fabric elongation is measured under the following conditions.
Sample size: length 100 mm (excluding grip), width 25 mm.
Tensile tester: Tensilon tensile tester.
Initial load: 0.1N.
Tensile speed: 300 mm / min.
Tensile length: Extends to 9.8N load.
Measurement: Elongation under the above conditions, the longitudinal elongation or weft elongation under a 9.8 N load is calculated by the following formula, and the decimal point is rounded off to obtain the woven fabric elongation.
Woven fabric elongation (%) = (elongation length under 9.8 N load (mm) / 100) x 100

(5) Woven fabric density A woven fabric that has been humidity-controlled for 24 hours or more in an environment of 20 ° C. and 65% RH is placed on a desk, and the number of warp and weft threads between any three 1-inch (2.54 cm) squares is counted. Calculate the average value of 3 times for the unit length, and round off to the nearest whole number to obtain the textile density.

(6) Composite yarn elongation efficiency A woven fabric that has been humidity-controlled for 24 hours or more in an environment of 20 ° C. and 65% RH is placed on a desk, and while expanding with a loupe, the fabric is cut along the composite yarn containing elastic yarn. Make an observation cross section. In the example, the woven fabric was cut into a rectangle of about 1 cm × 10 cm, and the long side was used as the observation cross section. First, the test piece is fixed in the vertical direction under no load, and an image of the observation cross section is taken using a digital microscope (VHX-6000 manufactured by KEYENCE CORPORATION). Next, the test piece is fixed with a jig in a state of being stretched under a load of 9.8 N, and the observation cross section is similarly photographed. In each image, the fabric length of 10 yarns without elastic yarn and the length of the composite yarn containing elastic yarn woven into 10 yarns without elastic yarn are measured. Let A be the fabric length of 10 yarns without elastic yarn under no load, and B be the length of the composite yarn containing elastic yarn woven into the woven fabric length A, under a load of 9.8 N. Let C be the fabric length of 10 yarns not including the elastic yarn in, and let D be the length of the composite yarn containing the elastic yarn woven into the woven fabric length C. Three test pieces were collected from a piece of cloth or clothing product, and the obtained A to D were calculated by the following formula (1):
Composite yarn elongation efficiency = {A × (DB)} / {B × (CA)} (1)
Substituted in, the second digit after the decimal point averaged over three points is rounded off to obtain the composite yarn elongation efficiency.

(7) Degree of bending of composite yarn In the same procedure as the calculation of the elongation efficiency of composite yarn, the fabric length of 10 yarns not including elastic yarn is measured from the observation cross-sectional photograph under no load, and is designated as A. Further, let e be the number of times of bending of the composite yarn including the elastic yarn in the fabric length A, and let f be the average bending width at the bending point of the composite yarn including the elastic yarn. Since the number of bends e differs depending on the woven fabric structure and the like, the average bend width f is the average value of the number of bends e points, and when e ≧ 3, the average value of the three points is used. For example, when e = 2, f is the average value of 2 points, and when e = 5, the average value of 3 points is used. Three test pieces were collected from a piece of cloth or clothing product, and the obtained A and f were calculated by the following formula (2):
Composite yarn bend = f / A (2)
Substitute in, and round off the third digit after the decimal point, which is averaged over three points, to obtain the compound yarn bending degree.

(8) Breathability A woven fabric that has been humidity-controlled 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 by the JIS L1096 breathable Frazier method. The obtained numerical value is rounded off to the first decimal place to make it breathable.

(9) Feeling of wearing Stretch pants that fit the entire leg are sewn using the woven fabrics obtained in the examples and comparative examples, worn in an environmental test room at 15 ° C. and 50% RH, and at 4 km / min on a treadmill. After walking at speed for 10 minutes, the following evaluation criteria: "warmth" and "easiness of movement":
<Warmth>
◯: The entire pants including the knees, buttocks, and thighs feel warm;
Δ: The part where the knees and buttocks repeatedly expand and contract is warm;
×: I do not feel warmth;
<Easy to move>
◯: Easy to move;
Δ: Slightly easy to move;
×: Hard to move;
Then, each is judged. ○ and △ were accepted.

[Example 1]
During the spinning process of cotton-dyed cotton as a composite yarn, an elastic yarn of 44 dtex stretched four times was inserted to produce a composite yarn of 340 dtex as CSY, and this composite yarn was used as a weft. As the warp, 310 dtex spun yarn was wound around a beam and set on a loom, and a V-shaped reed was used to insert two yarns / feathers so that the warp density was 68 yarns / inch. With a 3/1 twill structure, weft threads were driven in and woven under the condition of 50 threads / inch, then scoured with a continuous scouring machine, and then finished set at 190 ° C. and 140 cm width for 1 minute to obtain an elastic woven fabric.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

[Examples 2 and 3]
In Example 1, the warp density was 68 threads / inch and the weft density was 50 threads / inch (Example 2), and the warp density was 63 threads / inch and the weft density was 47 threads / inch. A woven fabric (Example 3) was produced and finished in the same manner as in Example 1.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

[Example 4]
In Example 1, the structure was a 1/1 taffeta structure, weft threads were driven in and weaved under the condition of 53 threads / inch, and then finished in the same manner as in Example 1.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

[Example 5, Comparative Example 1]
In Example 1, a woven fabric in which the tension at the time of weft driving was increased (Example 5) and a woven fabric in which the tension at the time of weft driving was decreased (Comparative Example 1) were produced and finished in the same manner as in Example 1.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

[Example 6]
A 200 dtex composite yarn obtained by winding a 165 dtex polyester 2 heater-processed yarn around a 44 dtex elastic yarn stretched 3.5 times under the condition of 800 T / m was used as a weft. As the warp, 165 dtex polyester 2 heater processed yarn is wound around the beam and set on the loom, 2 pieces are put in a 40-inch / inch reed / reed, and 80 lines / inch are driven into a 2/1 twill structure. After weaving the woven fabric, scouring was performed with a continuous smelting machine, and then finishing setting was performed at 185 ° C. and a width of 145 cm for 1 minute to obtain an elastic woven fabric.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

[Example 7]
During the spinning process of cotton dyed cotton as a composite yarn, an elastic yarn of 78 dtex stretched four times was inserted to produce a composite yarn of 560 dtex as CSY, and this composite yarn was used as a weft. As the warp yarn, a spun yarn of 500 dtex was wound around a beam and set on a loom, and two yarns / feathers were put in a 20-inch / inch reed. After weaving with a 2/1 twill structure under the condition of 38 wefts / inch, scouring was performed with a continuous scouring machine, and then finishing set was performed at 185 ° C. and a width of 135 cm for 1 minute to obtain an elastic woven fabric.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

[Example 8]
During the spinning process of cotton dyed cotton as a composite yarn, an elastic yarn of 44 dtex stretched four times was inserted to produce a composite yarn of 340 dtex as CSY, and this composite yarn was wound around a beam and set on a loom. Two pieces were put in a feather / inch reed / a reed with feathers. Using 310 dtex spun yarn as the weft, weaving with a 2/1 twill structure under the condition of driving 54 yarns / inch, scouring is performed with a continuous scouring machine, and then finishing set is performed at 190 ° C. and a width of 140 cm for 1 minute. An elastic fabric was obtained.

[Comparative Example 2]
During the spinning process of cotton dyed cotton as a composite yarn, an elastic yarn of 44 dtex stretched three times was inserted to produce a composite yarn of 340 dtex as CSY, and this composite yarn was used as a weft. As the warp yarn, a 310 dtex spun yarn was wound around a beam and set on a loom, and two yarns / feathers were placed in a 33-inch / inch reed. After weaving with a 2/1 twill structure under the condition of 54 wefts / inch, scouring was performed with a continuous scouring machine, and then a finishing set was performed at 180 ° C. and a width of 130 cm for 1 minute to obtain an elastic woven fabric.
The evaluation results of the obtained stretchable woven fabric are shown in Table 1 below.

The elastic woven fabric of the present invention can be used for clothes such as tops such as shirts and bottoms such as pants having a soft stretch feeling, and can also be used as a supporter in close contact with the body covering joints, and has heat retention. It is possible to provide garment products that can be expected to prevent injuries and have a fat burning effect by warming the muscles and joints at the extension site. In the prior art, it was necessary to use a composite yarn of an inelastic yarn and an elastic yarn for both the warp and the weft, but in the elastic woven fabric of the present invention, a composite yarn of the inelastic yarn and the elastic yarn is used for either of them. If it is used, it is possible to obtain a thin, lightweight, and soft-textured elastic woven fabric because it generates sufficient heat when it expands and contracts. Furthermore, it is possible to improve productivity and reduce costs, so that it can be widely used. You can expect it.

1: Composite yarn of inelastic yarn and elastic yarn 2: Thread without elastic yarn A: Fabric length B for 10 warp yarns under no load: Non-elastic yarn woven in the range of fabric length A Length of composite yarn of yarn and elastic yarn f: Average bending width at bending point of composite yarn of inelastic yarn and elastic yarn

Claims (7)

Only one of the warp and the weft is a composite yarn of an inelastic yarn and an elastic yarn, and the other is a stretchable woven fabric that does not contain an elastic yarn, and the fineness of the composite yarn is 100 to 100. It is 700 dtex, and the woven fabric contains an elastic yarn at 5 to 30 g / m ² , and the elongation rate of the woven fabric in the direction containing the elastic yarn under a 9.8 N load is 20 to 60%. In addition, in the direction including the elastic yarn of the woven fabric, the following formula (1):
Composite yarn elongation efficiency = {A × (DB)} / {B × (CA)} (1)
{In the formula, A is the fabric length of 10 yarns not including the elastic yarn in the cross section in the direction of the composite yarn of the inelastic yarn and the elastic yarn of the woven fabric under no load, and B is the fabric length of the yarn. The length of the composite yarn woven in the range of the fabric length A in the cross section, and C is the elasticity of the woven fabric in the cross section when the fabric is stretched under a 9.8 N load in the direction including the composite yarn. It is the fabric length of 10 yarns containing no yarn, and D is the length of the composite yarn woven into the fabric length C in the cross section. } Is a stretchable woven fabric having a composite yarn elongation efficiency of 0.4 to 1.0. The fabric is attached to a stretch tester without stretching under conditions that do not receive external energy supply other than stretching, then stretched by 20% in the direction containing the elastic yarn of the fabric, and then relaxed to the original length. After repeating expansion and contraction at a rate of 100 times / minute for 5 minutes, the woven fabric temperature at the time of the 500th 20% elongation was measured by thermography to match the woven fabric temperature before the start of the test. The elastic woven fabric according to claim 1, wherein the instantaneous heat generation temperature calculated from the difference is 1.0 ° C. or higher. The elastic woven fabric according to claim 1 or 2, wherein the weft is a composite yarn of an inelastic yarn and an elastic yarn. The stretchable woven fabric according to any one of claims 1 to 3, which has a breathability of 2.0 to 10.0 cc / cm ² / sec. The stretchable woven fabric according to any one of claims 1 to 4, wherein the woven fabric structure is 2/1 twill, 3/1 twill, or 4/1 twill. A garment containing the elastic woven fabric according to any one of claims 1 to 5. The garment according to claim 6, which is used in close contact with the body.

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