JP2013096027A - Stretch fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stretch fabric having high elongation and excelling in elongation recovery in which there are two or more kinds of belt-like regions different in stresses in a weft direction and there is no seam on a border between the regions.SOLUTION: Fabric using covered yarns as a warp yarn and a weft yarn, the covered yarns composed of a spandex fiber as a core yarn and a synthetic fiber as a sheath yarn, has elongation of 40% or more in at least any one of longitudinal and lateral directions and excellent elongation recovery, and includes a region A having a large stress in a weft direction adjoins a region B having a small stress in the weft direction and no seam on a border therebetween. Therefore it is possible to form clothes having both a motion followability function (stretchability) and a compression (fitting) function in some regions in one sheet of fabric without a seam using one sheet of fabric.

Description

  The present invention relates to a stretch fabric having high elongation and excellent stretch recovery, characterized in that there are two or more types of belt-shaped regions having different stresses in the weft direction and there is no seam at the boundary between the regions.

In recent years, fabrics with stretch have been diversified not only for sports use but also for general use jackets, slacks, skirts, shirts, etc. due to the demand for mobility. However, sportswear that is in close contact with the inner or skin is required to have high stretchability and recoverability, so that many knitted fabrics that are easy to stretch are used and the number of fabrics is small. However, although the knitted fabric is excellent in stretchability, there is a problem that the fabric is thick and the fabric is thick. However, since the woven fabric is lightweight and the fabric is thin, it has been diversified in swimming swimsuits in recent years.
In addition, recent sportswear and sports innerwear, swimwear and clothing with support functions increase not only the stretch rate and recoverability that can follow intense movements, but also the tightening power of specific parts of the body, and body correction A compression function that suppresses vibrations of muscles and muscles is required, and by combining materials with different stretch characteristics, tightening of specific parts of the human body is strengthened, improving hip-up effect, reducing running water resistance in water, improving exercise function, posture The functions that make it easier to maintain are retained. In addition, wear has been proposed in which the tightening force is weakened only at joints where the bases such as arms and legs are movable to make the movement easier.
Patent Document 1 proposes a lightweight fabric having a high elongation rate of 50% or more and excellent recoverability, but does not have different stresses in one fabric.
Conventionally, in swimsuits as described in Patent Document 2, two or more types of knitted fabrics and fabrics having different stretch characteristics have been combined and combined with sewing or adhesive tape in order to provide different elongation rates and stresses. There is a problem in that the stretch rate is reduced due to the presence of seams between the stretch materials, and the movement following ability is hindered. In addition, there is a problem that the seam allowance on the skin side is not good, and the sewing part bites into the skin, and after the attachment and detachment, the mark of the sewing part remains on the skin. It was.
Also, in Patent Document 3, a polyurethane panel with low stretchability is bonded to a stretchable fabric with excellent stretchability, but due to adhesion of the panel and resin, breathability is reduced and stuffiness occurs when worn There was a problem to do.
Patent Document 4 proposes a knitted fabric in which two types of regions having different stretch characteristics are changed by changing the fineness of the elastic fiber, but it is only a description of the knitted fabric.

JP2010-138496 JP2011-137269 JP2008-150767 5-19309

  In view of the problems of the prior art, the present invention is intended to provide a stretch fabric having high elongation, excellent stretch recovery, and excellent touch.

As a result of intensive studies, it has been found that the present invention can be achieved by the following configuration.
(1) At least two types of belt-like regions with different stresses when stretched 30% in the weft direction in a woven fabric using spandex fibers as the core yarn and synthetic yarns for the sheath yarn as the warp and weft yarns There is no seam at the boundary between areas where the stresses are different, the vertical and / or horizontal elongation rate is 40% or more, and the vertical and / or horizontal elongation recovery rate is 75% or more. Stretch fabric characterized by
(2) The stretch according to the above (1), wherein the regions having different stresses are composed of a region A where the stress is large and a region B where the stress is small, and the region A and the region B are alternately adjacent to each other. fabric.
(3) A region where the stress is different is composed of a region A where the stress is large, a region B where the stress is small, and a region C which exceeds the stress of the region B and has a stress less than the stress of the region A. The stretch fabric according to (1) above, wherein there is no seam at the boundary between the regions.
(4) The difference between the maximum stress and the minimum stress in the band-like regions having different stresses, wherein the maximum stress is 5% or more and 50% or less of the minimum stress, Stretch fabric.

(5) The stretch fabric according to any one of (1) to (4) above, wherein the stretch fabric is subjected to a surface smoothing process and / or a water repellent process.
(6) A garment characterized by using the woven fabric according to any one of (1) to (5) as at least a part thereof.
(7) A swimsuit characterized in that the woven fabric according to any one of (1) to (5) is used for at least a part thereof.

  There are two or more belt-shaped areas with different stresses in the weft direction of the present invention, and there is no seam at the boundary between the areas. It is possible to provide a stretch fabric that is suitably used for sportswear with enhanced exercise effects, swimwear with low running water resistance, and clothing with a support function.

An embodiment of the region arrangement of the present invention is shown. An embodiment of the region arrangement of the present invention is shown. An embodiment of the region arrangement of the present invention is shown. An embodiment of the region arrangement of the present invention is shown. An embodiment of the region arrangement of the present invention is shown. An embodiment of the region arrangement of the present invention is shown.

Hereinafter, the present invention will be described in detail.
The present invention relates to a stretch fabric using spandex fibers as core yarns and synthetic yarns as sheath yarns for warp yarns and weft yarns, a low elongation region where stress in the weft direction is large, and stresses in the weft direction. Two or more types of high elongation regions where the size is small are adjacent to each other in a band shape, and have excellent stretch recovery performance. To form strong and weak areas in the weft direction of stretch fabric, you can change the type and fineness of the spandex fiber used for the weft, and the type, fineness, and cross-sectional shape of the synthetic fiber. The number of filaments, raw yarn, processed yarn, etc. may be changed. Moreover, the driving density of the weft yarn may be changed. Furthermore, it is possible to change the structure such as plain weave, twill weave, satin weave, weft double weave, and their changed structure, and by each of them alone or in combination, a band-like region having different stress in the weft direction can be formed. Can be obtained.
As the difference between the maximum stress and the minimum stress in the band-like regions having different stresses at the time of 30% elongation, it is preferable that the maximum stress is 5% or more of the minimum stress so that the difference can be suitably experienced. On the other hand, if the stress difference exceeds 50%, the width of the woven fabric may vary greatly during the processing of the woven fabric, and the pin may not be set during heat setting, or the dimensional stability may be poor due to insufficient heat setting. In addition, when the stress difference is 50% or more, wrinkles, skewing, and puckering occur, and the machining process passability deteriorates and the quality deteriorates. Therefore, the stress difference is preferably 5% or more and 50% or less. By forming a region C that exceeds the stress of the region B with low stress and has the stress below the stress of the region A with high stress between the region B with low stress and the region A with high stress. The stress difference between the region A and the region B can be increased. In addition, the occurrence of width fluctuations, wrinkles, skewing, and puckering is reduced, and the stretch recovery property is excellent. When stretched and worn, there is little surface irregularity and it is possible to prevent an increase in running resistance.
The band-like widths of the low-elongation region A in which the stress in the weft direction is large and the high-elongation region B in which the stress in the weft direction is small are not particularly limited.
In FIG. 1, a region B having a low stress is formed adjacent to the region A having a high stress in the base fabric. It is preferable that the region A is disposed on the waist or the like that needs to be tightened.
2, 3, and 5, the base fabric is a region B where the stress is small, and a region A where the stress is large is formed in a band shape, and the region A includes a waist part, a hip part, a thigh part, It is preferable that it is arranged at a place where a tightening force is required, such as the upper arm.
4 and 6, the base fabric is a region A where the stress is large, and a region B where the stress is small is formed in a band shape, and the region B is located at a place where tightening is not required, such as the knee, elbow, and groin. It is preferable that they are arranged.
A region C in FIGS. 5 and 6 is between the region A and the region B, and the stress exceeds the stress in the region B and is less than the stress in the region A. By forming the region C, the stress difference between the region A and the region B can be increased, and the effects of reducing wrinkles, skewing, puckering, etc., and improving the stretch recovery property are obtained. The width of the region C is not particularly limited, but is preferably smaller than the width of the region of the base fabric.
As for the weft yarn forming the region A, the region B, and the region C, one type of covering yarn may be used in each region, or two or three types of covering yarns may be used in combination in each region. May be.
Since the woven fabric is usually set to a length of about 50 m after dyeing, it is possible to repeat the combination of each region several times with one pitch.
In addition, it is important that the boundary between the region A and the region B can be clearly distinguished at the time of sewing. Therefore, it is preferable to change the type and fineness of the synthetic fiber of the coated yarn or to change the structure, and it is preferable to change the type of the synthetic fiber and dye it with a different color at the time of dyeing. It is also preferable to change the ear tissue in order to mark each repeat.
In the present invention, it is important that the yarn used for the woven fabric is a coated yarn using spandex fibers as the core yarn and synthetic fibers as the sheath yarn. Spandex yarns and synthetic yarn coated yarns have excellent elongation and recovery, and have the strength required for tight innerwear, swimwear and sportswear. The covering yarn using the spandex yarn for the core and the synthetic fiber for the sheath may be a covering yarn obtained by using a covering machine, or may be a twisted yarn after alignment. Alternatively, it may be a composite fiber in which spandex yarn and synthetic fiber are mixed and entangled with an air processing machine using a taslan nozzle or an entanglement nozzle. Covering yarns are more preferred because they have better coverage of the core spandex yarns. As for the method of the cover ring, a single cover ring that covers the yarn in one direction to the core yarn and a double cover ring in which the right and left yarns are covered by the core yarn are known as known methods, In the present invention, when covering weight is reduced, single covering is preferable. In covering, the spandex fiber is subjected to an appropriate draft. In order to obtain a high stretch fabric, the draft ratio should be 3 times or more, more preferably 3.5 times or more and 4 times or less. Is preferred. If the draft rate is less than 3 times, it may be insufficient to make a high stretch woven fabric. Conversely, if the draft rate exceeds 4 times, the thread breakage of spandex fibers and the like tends to be deteriorated during the production of the coated yarn. is there.

The thickness of the spandex fiber of the core yarn is preferably 22 dtex or more and 156 dtex or less. The region B where the stress at 30% elongation in the horizontal direction is small is easy to stretch and is suitable for use in a portion where movement followability is required, and the region A where the stress at 30% elongation in the horizontal direction is large is difficult to stretch. Suitable for use in parts where tightening force is required. The stress at the time of stretching of the stretch fabric is not determined only by the thickness of the spandex fiber, but the spandex fiber in the region B where the stress is large in the thickness of the spandex fiber is the spandex fiber in the region B where the stress is small. The fineness is preferably the same or thicker than the fineness. When the spandex fiber has a fineness of less than 22 dtex, high stretchability is difficult to obtain, and when the spandex fiber exceeds 156 dtex, the stress is high but the basis weight becomes heavy.
The fabric weight is preferably 250 g / m ² or less in terms of weight reduction. The spandex yarn used may be a known one, such as “Roika” from Asahi Kasei Fiber Co., Ltd. or “Lycra” from Toray Operontex Co., Ltd. Since the stress varies depending on the type of spandex fiber, it is preferable to select an appropriate use region. However, in the case of swimsuits, since it is premised on use in a pool, it is preferable to use spandex fibers with excellent chlorine resistance such as “Roika SP”, “Lycra-176B”, “Lycra-254B”, “Lycra-909B”. It is preferable to use it.
A well-known synthetic fiber may be used for the sheath yarn. Although there are various synthetic fibers, it is preferable to use polyamide fibers or polyester fibers from the viewpoint of strength and workability. Although there are various types of polyamide-based fibers, nylon 6, nylon 66, and nylon 610 are preferably used from the viewpoint of strength and processability of spandex mixed fabric.
Polyester fiber may be any of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, etc., but polyethylene terephthalate is required for good heat setting properties, and polybutylene is required for high elongation. For example, terephthalate or polytrimethylene terephthalate can be selected as appropriate. However, although these fibers are generally dyed with disperse dyes, the disperse dyes contaminate the polyurethane fibers, which may cause poor color fastness such as color transfer in the final product. Therefore, it is preferable to use a cationic dyeable polyester fiber that can be dyed with a cationic dye. In the case of an unwoven product with nylon, an atmospheric pressure cationic dyeable polyester that can be dyed at 100 ° C. or lower is more preferable among the cationic dyeable polyester fibers.
Furthermore, it is also preferable to use polypropylene fibers for swimsuit applications. Since the polypropylene fiber is hydrophobic, the water repellency of the fabric is improved. However, it is more preferable to use the original yarn because it has a drawback that it is difficult to dye.
The fineness of the synthetic fiber of the sheath yarn is preferably 17 dtex or more and 165 dtex or less, in order to reduce the weight, and in particular, the basis weight is preferably 250 g / m ² or less. The stress at the time of stretching of the stretch fabric is not determined only by the thickness of the synthetic fiber, but the region where the stress of the synthetic fabric in the region A where the stress at the time of stretching in the weft direction of the stretch fabric is large is the region where the stress is small. It is preferable that it is the same or larger than the fineness of the synthetic fiber of B.
There are no particular restrictions on the fiber form and cross-sectional shape of the synthetic fiber used for the sheath yarn, but in order to make a high stretch fabric, false twisting is applied to the synthetic fiber used as the sheath yarn by a well-known method to impart crimps. It is preferable to keep it. In general, spandex blend fabrics are not limited in the degree of elongation of the spandex used as the core yarn, but the length of the sheath yarn is often insufficient, so the stretchability is often limited. The stretch rate can be made higher than that of raw silk products that do not have any. There are various types of false twisting methods such as pin type, friction type, and belt type, but the method is not particularly limited in the present invention. However, when using synthetic fibers with a small total fineness, it is preferable to use a pin type, and when using friction, it is preferable to apply false twist corresponding to the synthetic fibers with a small total fineness, such as increasing the number of disks. The fabric using the core spandex and the sheath yarn made of the sheath synthetic fiber obtained by these methods needs to be designed and dyed so that the elongation ratio of at least one of warp and width is 40% or more.
In order to make the elongation rate in the vertical direction 40% or more, it is preferable to adjust the vertical shrinkage rate to 60% or more by adjusting the finish horizontal density with respect to the loom filling density. In order to make the elongation rate in the horizontal direction 40% or more, it is preferable that the horizontal shrinkage rate is 65% or more by adjusting the finishing width with respect to the insertion width. In order to increase the vertical shrinkage rate and horizontal shrinkage rate, the green machine density must be lower than the normal design. However, if the green machine density is too low, problems such as misalignment and wrinkles will occur in the subsequent dyeing process. Since it becomes easy to generate | occur | produce, it is preferable to set the green machine density in the range which achieves the above-mentioned shrinkage rate and does not generate a problem. In order to increase the warp elongation ratio to 40% or more, if the number of weaving looms in the loom is less than the normal design, and the finished weft density is higher than the normal design, the warp shrinkage will increase and the warp elongation will increase. The rate can be 40% or more. From the above, when forming the region B adjacent to the region A, even if the fineness of the synthetic fiber or lycra of the region B is reduced, the gap between the living machines is increased, the processing shrinkage is increased, and the density can be increased. There is sex.
To increase the horizontal stretch rate to 40% or more, the number of warp yarns on the loom is smaller than the normal design, the finished width is smaller than the normal design, and the vertical density increases, the horizontal shrinkage rate increases. It can be made 40% or more.
Since weaving uses polyurethane fibers as weft yarns, water jet loom (WJL) with high weft peak tension is not preferred, and air jet loom (AJL) or rapier loom is preferred. The definitions of the vertical contraction rate and the horizontal contraction rate are as follows.

Vertical shrinkage (%) = (finishing horizontal density-number of weaving looms) ÷ number of weaving wefts x 100
Horizontal shrinkage rate (%) = (insertion width-finishing width) ÷ finishing width x 100
It is also preferable to change the number of weaving yarns in order to obtain different regions of stress in a strip shape in the weft direction.
In the dyeing finish, a known process for processing an existing 2WAY fabric or knitted fabric can be used. The specific process may be appropriately selected depending on the stretch ratio of the target fabric and the surface quality, such as spreading scouring / relaxation, intermediate set, dyeing, finishing set and ready machine set, liquid scouring / relaxing, dyeing, finishing set.

Furthermore, for swimming swimsuits, it is preferable that the fabric is subjected to a water-repellent finish in the finishing process. If the water retention rate of the swimsuit fabric is high, the load at the time of wearing becomes high, and the load can be reduced by applying a water repellent finish. Although the water repellent finish may be applied to the entire stretch fabric, it may be partially subjected to water repellent finish in consideration of water drainage.
Further, in order to reduce the surface resistance of the fabric to water and to reduce the water retention rate, it is preferable to smooth the surface of the stretch woven fabric by calendering. As a processing machine, an ordinary heating roll and paper roll, or a calendar processing machine using a cotton roll, or a calendar processing machine using a plate-like material may be used. In addition, when using a heating metal roll, it is preferable that it is a mirror surface roll. As another technique, the fabric can be made into a sewn product, and smoothing can also be performed by hot pressing after cutting. In addition, when used as a fabric for swimming wear, the calendering conditions are about 1 to 60 t in linear pressure with respect to the width of the fabric of 100 to 220 cm, as described in JP2003-328212, and the roll temperature. Is preferably selected from the range of 160 to 250 ° C. according to materials such as nylon 6 woven fabric, nylon 66 woven fabric, nylon 610 woven fabric, and polyester woven fabric.

The stretch fabric obtained in these configurations has an elongation ratio of at least one of the vertical and horizontal directions of 40% or more, and more preferably has an elongation ratio of 40% or more in both the vertical and horizontal directions.
According to Textile Society of Japan, Vol. 36, No. 6 (1983) “Skin Elongation and Clothes Elongation” by Takashi Harada et al., The elongation of the skin due to movement is 62% in the vertical direction at the back elbow (elbow head) in women. When it is 66% in the vertical direction at the axilla, and the movement followability is determined with a swimsuit that is in close contact with the skin, at least one of the vertical and horizontal directions is maintained in the region B where the stress is small in the region B where the stress is small. It is preferable.
Moreover, since the swimsuit is produced with a pattern that is approximately 30% to 40% smaller than the human body, an elongation rate of skin elongation + 30% is more preferable. It is preferable to arrange a region B having a large elongation in a portion where the skin elongation is necessary and to use a region A having a small elongation in a portion where the skin elongation is small. Even if the skin elongation is small, it is preferable that the elongation ratio of any one of the vertical and horizontal widths is 40% or more in consideration of attachment / detachment. Here, the elongation rate is a value measured by the JIS L1096A method (cut strip method).

In addition, swimwear, sportswear, and sports underwear that are worn comfortably on the human body are made smaller than the human body, and in the case of competitive swimsuits, they are made with patterns that are 30 to 40% smaller. The stress at the time of 30% elongation becomes the tightening force, which acts as a pressure. The greater the pressure applied to the part of the human body that needs to be tightened, the smaller the volume of the human body that is pressed against the muscles of the human body. This is possible by appropriately selecting a combination of the fineness, the number of filaments, the number of drafts, the twisting factor, the density of the green machine, the finishing density, and the like of the spandex fiber and the synthetic fiber.
In addition, it is necessary to follow the stretched wear by exercise, and it is necessary to recover instantly along with the movement of the body after being stretched. In addition, when two or more types of regions different in the weft direction are formed, since the stress is different and a tendency to be inferior in stretch recovery is recognized, the stretch fabric of the present invention has a stretch recovery rate in the warp direction and / or the warp direction. Is preferably 75% or more. In particular, when used in competitions such as swimming swimsuits that are in close contact with the skin and have vigorous movements, the elongation recovery rate is more preferably 80% or more.
The stretch fabric of the present invention is preferably used as clothing that is in close contact with the human body or clothing that requires compression. Specifically, swimwear, skate wear, ski wear, jumpsuit, leotard, soccer wear, baseball uniform, mountain climbing Various sportswear such as clothing, sports innerwear, and clothing and supporters such as underwear having a support function can be exemplified as preferable applications.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these.

Evaluation in the examples was carried out by the following method.
〔Elongation〕
Measured according to JIS L1096 A method cut strip method.
The width of the test piece was 5 cm and the holding interval was 20 cm.
The initial load was a load corresponding to gravity applied to a length of 1 m in the width of the test piece.
The tensile speed was 20 cm / min.
The elongation percentage (%) when loaded with 17.7 N (1.8 kg) was measured.

  The stretch rate in the warp yarn direction including the areas adjacent to the base material and the areas adjacent to each other is measured three times and displayed as an average. When there were many alternately adjacent areas and the gripping distance exceeded 20 cm, the measurement was divided into two or more in the length direction.

The horizontal direction is measured separately for all areas adjacent to the base material. When the band-like width was less than 5 cm, the width was measured.
[Stress at 30% elongation]
The stress (N) at the time of 30% elongation at the time of measuring the elongation rate in the weft direction was determined and converted per 1 cm.

  All areas adjacent to the base material were measured individually, and when the band width was less than 5 cm, it was measured with a measurable width and displayed as N / cm per cm.

The difference between the maximum region and the minimum region was calculated as a percentage of the difference from the region where the stress was large based on the region where the stress was small.
[Elongation recovery rate]
It measured according to JIS L1096 A method.
The width of the test piece was 5 cm, and the holding interval was 20 cm.
The initial load was a load corresponding to gravity applied to a length of 1 m in the width of the test piece.
The tensile speed was 20 cm / min.
Elongation up to 17.7 N (1.8 kg) was repeated 5 times, and the extension recovery rate was calculated by the following formula.

  Similar to the measurement of the elongation rate, the warp yarn direction is displayed by averaging N = 3 in the warp yarn direction including regions adjacent to the base material and regions adjacent to each other alternately. When there were many alternately adjacent areas and the gripping distance exceeded 20 cm, the measurement was performed by dividing two or more locations in the length direction.

The weft direction is measured individually for all areas adjacent to the base material, and when the belt-like width is less than 5 cm, it is measured with a measurable width and displayed as an average of three times, the recovery rate of elongation = (L10 -L'10) / L10 * 100
L10 = 17.7N Elongation under load (cm)
L'10 = residual spread after repeated loading 5 times (cm)
[Example 1]
Chlorine-resistant lycra "Lycra-254B" 33T manufactured by Toray Operontex Co., Ltd. is used as the core yarn, nylon 6 raw yarn of 22 decitex 20 filaments as the sheath yarn, twist rate 1400T / M with a core yarn draft rate of 3.5 times A single covering yarn was prepared. Let this covering thread be (1). Toray Operontex Co., Ltd.'s chlorine-resistant lycra "Lycra-254B" 55T is used, 78 decitex 68 filament nylon 6 raw yarn is used, the core yarn draft rate is 3.4 times, and the twist number is 800 T / M. A single covering yarn was prepared. Let this covering thread be (2).
For the area A where the stress of the base material is large, the yarn of (1) is the warp yarn, the rapier weaving density is 90 wings / whale size (3.788 cm), 2 folds are put into the weft, and the yarn of (1) is used. A plain weave was knitted by driving the weft yarn into a width of 15 cm in the product at a weft density of 100 / 2.54 cm alternately with the yarn of (1) and (2). In the region B where the stress is continuously reduced, 15 yarns of (1) and 2 yarns of (2) are repeated as the weft yarn, and the width becomes 100 cm / 2.54 cm and the width becomes 35 cm. A plain weave was struck to make a plain weave. An outline is shown in FIG. After relaxing and scouring with the raw machine opened, an intermediate set and a liquid dyeing machine were dyed amber with an acidic dye at 90 ° C., and then finished with a width without applying excessive tension. The resulting fabric has an elongation of 40% or more measured at a spacing of 20 cm with a region B10 cm continuous with the region A10 cm in the warp direction, and the stress in the weft direction at 30% elongation is 1.4 N / The stress in the region B was 1.2 N / cm with respect to cm, and the difference was 17%. The elongation recovery rate was 75% or more in the warp yarn direction under the same conditions as in the elongation rate measurement, and in the weft direction in any of the regions A and B. A men's swimsuit was produced by arranging region A around the waist of the front and back bodies, and region B in the other part. The difference between the areas A and B and the support power of the area A were experienced. Compared to a fabric with seams, the fabric surface had less irregularities and was excellent in running water resistance. Table 1 shows the elongation ratio.
[Example 2]
Chlorine-resistant lycra "Lycra-254B" 44T manufactured by Toray Operontex Co., Ltd. is used as the core yarn, and nylon 610 of 22 decitex 24 filaments as the sheath yarn is twisted at a draft rate of 3.5 times of the core yarn at 1400T / M single covering yarn was prepared. Let this covering thread be (3). As the core yarn, chlorine-resistant lycra “Lycra-254B” 55T of Toray Operontex Co., Ltd. is used. Cationic dyeable polyester yarn of 33 dtex 24 filaments is used. M, single covering yarn was prepared. Let this covering thread be (4).
For the region B where the stress of the base material is low, using the yarn of (3) for warp and weft, a rapier weaving machine has a cocoon density of 90 feathers / whale size (3.788 cm), 2 cocoon holders, and 103 cocoon density / Weaved a plain yarn so that the width of the product was 15 cm at 2.54 cm, and woven a plain weave. Continuously, for region C, weaving 15 yarns of (3) and 15 yarns of (4) as weft yarns so that the width is 103 cm / 2.54 cm and the product width is 5 cm. The driven plain weave was woven. Continuously, weaving a plain weave for region A by weaving the yarn of (4) at a weft density of 103 / 2.54 cm and a product width of 10 cm. Subsequently, the plain weave was woven so that the region C was used under the same conditions and the width was 5 cm with the product under the same conditions, and then the plain weave was continuously woven using the same yarns under the same conditions and the width was 15 cm with the product. Region B + region C + region A + region C + region B was taken as 1 pitch to obtain a living machine. An overview is shown in FIG. After relaxing and scouring the raw machine in an open state, after dyeing nylon 610 in black with an acid dye and a cationic dye in red with an acid dye at an intermediate set, a liquid dyeing machine at 120 ° C., excess Finishing set was performed at a certain width without applying tension. The warp direction of the obtained woven fabric region B7.5cm, region C5cm, region A7.5cm, the elongation rate measured at a spacing of 20cm is 40% or more, the stress in the weft direction at 30% elongation is region B1. They were 2 N / cm, region C1.4 N / cm, and region A 1.7 N / cm. The difference in stress between region B and region A was 42%. The elongation recovery rate was 75% or more in the warp yarn direction under the same conditions as in the elongation rate measurement and in the weft direction in any of the regions A, B, and C. A region A was arranged on the back part of the back body, and a men's swimsuit was made in the same manner as in Example 1 for the front body. The support of the hips can be experienced and there is no problem with the ability to follow the movement. Compared with a fabric with seams, the fabric surface has less irregularities and has excellent resistance to running water. Table 1 shows the elongation ratio.
[Comparative Example 1]
After weaving a plain weave so that the product is 35 cm in the same condition using the same yarn usage (3) as in region B of Example 2, 15 weft yarns (3) and (4) in region A continuously. A plain weave was knitted by driving the weft yarn so that the width of the product was 15 cm at a weft density of 103 / 2.54 cm with two repetitions. Region A and region B were taken as 1 pitch to obtain a living machine, and dyeing was performed under the same conditions as in Example 2. The elongation rate of the region B10 cm and the region A10 cm in the warp yarn direction of the obtained woven fabric is 40% or more, but the stress in the weft direction at the time of 30% elongation is region B1.2 N / cm, region A1.25 N / cm, The difference in stress between region B and region A was 4%. The elongation recovery rate was 75% or more in the warp yarn direction under the same conditions as in the elongation rate measurement and in the weft direction in any of the regions A, B, and C. Similarly to Example 1, the region A was arranged around the waists of the front body and the back body, and the region B was arranged in the other part to prepare a men's swimsuit. The difference between areas A and B could not be experienced. Table 1 shows the elongation ratio.
[Comparative Example 2]
The core yarn is chlorine-resistant lycra "Lycra-254B" 55T manufactured by Toray Operontex Co., Ltd., 44 decitex 36-filament cationic dyeable polyester yarn, and the core yarn has a draft rate of 3.5 times and a twist of 1400T / M, single covering yarn was prepared. Let this covering thread be (5).
A plain weave was woven into a product of 35 cm in the same condition using the same yarn usage (3) as in the region B of Example 2, and a horizontal density of 103 yarns / 2. A plain weave was woven by driving a weft thread so that the product had a width of 15 cm at 54 cm. Region A and region B were set to 1 pitch to obtain a living machine, and dyeing was performed under the same conditions as in Example 2. In the obtained woven fabric, the elongation rate of the region B10 cm and the region A10 cm in the warp yarn direction is 40% or more, but the stress in the weft direction at the time of 30% elongation is region B1.2 N / cm and region A2.1 N / cm. It was. The difference between the stress in the region B and the stress in the region A was 75%, and the shrinkage difference between the regions A and B was large, causing puckering and wrinkles. The elongation recovery rate was 75% or more in the warp yarn direction and the weft direction in region B under the same conditions as in the elongation rate measurement, but the elongation recovery rate in region A was 75% or less. Similarly to Example 1, the region A was arranged around the waists of the front body and the back body, and the region B was arranged in the other part to prepare a men's swimsuit. Although the difference between the regions A and B could be experienced, even when the difference between the regions A and B was greatly stretched and worn, the unevenness remained and the running water resistance was poor. Table 1 shows the elongation ratio.

  The stretch fabric according to the present invention is an inner fabric having a body shape correcting function by a stretch fabric having two or more types of belt-shaped regions having different stresses in the weft direction and having no seams at the boundaries between the regions and excellent in stretch recovery. It is also possible to provide a stretch woven fabric that is suitably used for sportswear having a compression function, sportswear with an enhanced exercise effect, swimwear with low running water resistance, and clothing having a support function.

Claims (7)

In a woven fabric using a spandex fiber as a core yarn and a covering yarn using a synthetic fiber as a sheath yarn as a warp yarn and a weft yarn, there are at least two types of belt-like regions having different stresses at 30% elongation in the weft direction, There is no seam at the boundary between regions where the stresses are different, the elongation rate in the vertical direction and / or the horizontal direction is 40% or more, and the elongation recovery rate in the vertical direction and / or the horizontal direction is 75% or more. Stretch fabric. The stretch woven fabric according to claim 1, wherein the regions having different stresses are composed of regions A in which the stress is large and regions B in which the stress is small, and the regions A and the regions B are alternately adjacent to each other. The regions having different stresses are composed of a region A in which the stress is large, a region B in which the stress is small, and a region C that exceeds the stress in the region B and has a stress that is less than the stress in the region A. The stretch fabric according to claim 1, wherein the boundary portion has no seam. The stretch fabric according to any one of claims 1 to 3, wherein the maximum stress is 5% or more and 50% or less of the minimum stress as a difference between the maximum stress and the minimum stress in the belt-like regions having different stresses. . The stretch fabric according to any one of claims 1 to 4, wherein the stretch fabric is subjected to a surface smoothing process and / or a water repellent process. A garment comprising the woven fabric according to any one of claims 1 to 5 as at least a part thereof. A swimsuit comprising the woven fabric according to any one of claims 1 to 5 as at least a part thereof.