JP2012219406A - Method of producing stretchable textile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of producing a textile with excellent stretching property and maintaining its width or length after the completion of weaving even after a processing step.SOLUTION: A method comprises three steps. The first step comprises: feeding a stretching thread A1 as a core thread from a bobbin that is wound by the thread A1 in a feed ratio of 0.8-1.5; feeding a low stretch dissoluble core thread B2 as another core thread from a bobbin that is wound by the thread B2 in a feed ratio of 1-1.05; and feeding the threads A1 and B2 with the threads A1 and B2 running in parallel through a hollow spindle having a bobbin that is wound by an insoluble thread C7 or a soluble thread C'7' so that the circumference of the thread A1 and B2 can be covered with the insoluble thread C7 or the soluble thread C'7' for forming a composite yarn. The second step comprises weaving the composite yarn. The third step comprises removing the dissoluble thread B2 in an obtained textile or removing both the dissoluble thread B2 and the soluble thread C'7' when the soluble thread C'7' is used as a covering.

Description

  The present invention relates to a method for producing a woven or knitted fabric composed of a composite yarn having stretchability.

  Conventionally, a knitted fabric occupies a representative position as a stretchable fabric. This is because the structure of the knitted fabric is formed by connecting loops, and thus has a stretchability in any direction. Therefore, even if the yarn has poor stretchability, the knitted fabric knitted with this loop connection structure exhibits stretchability. In addition to this, if an elastic yarn that originally has stretchability is used, the stretchability is further expanded. However, these elastic yarns have the drawback of being stretched by about 200% due to knitting tension during knitting.

  Since such a knitted fabric is knitted while stretching the elastic yarn, when the knitted fabric is removed from the knitting machine, the tension of the elastic yarn is released and it returns to its original length. It was impossible to avoid the phenomenon that the width was significantly reduced. In addition, the tension variation on the elastic yarn appears as it is in the width and length of the knitted fabric after knitting, so that the product width and product length become uneven, which increases the product loss rate. It was.

  On the other hand, if a yarn having poor elasticity is used in the woven fabric, the woven fabric has no elasticity. In order to give stretchability, we proposed a woven or knitted fabric that weaved and knitted using a coated composite yarn in which elastic yarn stretched about 300% and soluble yarn are aligned to form a core yarn and covered with a yarn with poor stretchability. (Patent Document 1).

  However, after weaving and knitting, in order to develop stretchability in the woven or knitted fabric, when the soluble yarn that is one of the core yarns is dissolved, the elastic yarn that has been stretched by about 300% tends to return to its original length. In some cases, the width of the woven or knitted fabric after knitting contracted significantly. For this reason, the width of the woven or knitted fabric made of ordinary yarns hardly changes. For example, even if two parts of a product can be taken, the width of the woven or knitted fabric is less than that of a woven or knitted fabric that is woven and knitted using a composite yarn using elastic yarn However, there was also a drawback that the loss rate was increased, such as only one part of the product could be removed.

  In this way, woven and knitted fabrics woven and knitted with composite yarns that use elastic yarns cause variations in the shrinkage and weaving length of elastic yarns. There were drawbacks such as the need to use a wide loom or knitting machine.

JP 2010-116641 A

  By using a special composite yarn, the present invention does not need to consider the shrinkage of the composite yarn generated by dissolving one soluble yarn of the core yarn, and can be woven and knitted in the same way as a normal woven or knitted fabric, Therefore, it aims at providing the woven / knitted fabric which has the outstanding elasticity which can also reduce a loss rate significantly.

  As a result of diligent research to solve these problems, the present inventors have supplied the stretchable yarn A as the core yarn in almost the original length, and supplied the low-elongation soluble yarn B as the other core yarn. Weaving and knitting using a composite yarn having a structure in which the periphery of the core yarn is spirally bundled with insoluble yarn C or soluble yarn C ′ in an aligned state, and then dissolving and removing soluble yarn B in the fabric or covering When the yarn C ′ was used as the yarn, it was found that by dissolving and removing both the yarn B and the yarn C ′, a woven or knitted fabric excellent in stretchability was obtained, and the present invention was completed.

That is, the gist of the present invention is that
“The elastic yarn A serving as the core yarn is supplied from the bobbin around which the yarn A is wound at a feed magnification in the range of 0.8 to 1.5 times, and the low elongation soluble yarn B serving as the other core yarn is 1 Supplied from a bobbin wound with yarn B at a feed magnification in the range of ˜1.05 times and passed through a hollow spindle having a bobbin wound with insoluble yarn C or soluble yarn C ′ while running yarn A and yarn B in parallel The first step of covering the periphery of the yarn A and the yarn B with the yarn C or yarn C ′ to form a composite yarn, the second step of weaving and knitting the composite yarn, and the yarn B in the obtained knitted fabric A process for producing a stretchable woven or knitted fabric comprising a third step of dissolving and removing both the yarn B and the yarn C ′ when the yarn C ′ is used as a covering yarn. is there.

  The invention disclosed in Patent Document 1 uses a stretchable composite yarn for producing a woven or knitted fabric, and the configuration of the yarn itself is the same as that of the stretchable composite yarn used in the woven or knitted fabric of the present invention. Yes, the stretched yarn used is different. The main difference is that the composite yarn disclosed in Patent Document 1 is different from the soluble yarn constituting the other core yarn in a state where the stretchable yarn constituting the core yarn is stretched nearly 300%. On the other hand, the stretchable yarn constituting the core yarn of the composite yarn of the present invention is almost integrated with its original length or slightly stretched. For the present invention, this is a very important point. Even if weaving and knitting the composite yarn and dissolving and removing the soluble yarn in the obtained woven or knitted fabric, the width of the woven or knitted fabric hardly changes from the width after weaving and knitting. is there.

  Since the composite yarn produced by the production method of the present invention hardly stretches the stretchable yarn constituting the core yarn, when the soluble yarn as the other core material is dissolved, the stretchable yarn is the original. There is no need to consider the shrinkage that occurs when returning to the length, and the woven / knitted fabric width is the same as that of a woven / knitted fabric using ordinary yarn, so there is no variation in the woven / knitted fabric length after weaving and knitting. Loss rate can be reduced, no special know-how on the processing considering the shrinkage of the woven or knitted fabric is required, and a wide loom or knitting machine considering the shrinkage of the width of the woven or knitted fabric can be eliminated. .

Schematic which shows the example of an apparatus which produces the elastic composite yarn of this invention.

  The stretchable woven or knitted fabric obtained by the production method of the present invention uses a composite yarn obtained by covering the stretchable yarn A and the low-extension soluble yarn B with the insoluble yarn C or the soluble yarn C ′. Weaving and knitting below, and then the yarn B is dissolved and removed, or when the yarn C ′ is used as a covering yarn, both the yarn B and the yarn C ′ are dissolved and removed, thereby improving the stretch characteristics of the yarn A. It is characterized by being demonstrated.

  The present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an example of a method for producing a stretchable composite yarn used in the present invention. Here, a case where two hollow spindles are used will be described. The yarn A drawn from the bobbin 1 wound with the elastic yarn A is guided between the feed roller 3 and the yarn supply roller 5 to the first-stage hollow spindle 8 at a feed magnification of 0.8 to 1.5 times. On the other hand, the yarn B pulled out from the bobbin 2 wound with the low elongation soluble yarn B is guided between the feed roller 4 and the yarn feeding roller 5 to the first-stage hollow spindle 8 at a feed magnification of 1 to 1.05 times. The yarn A and the yarn B are drawn by the yarn supplying roller 5 and guided in parallel to the hollow spindle 8. These two aligned yarns are used as a core yarn.

Here, the feed magnification range of 0.8 to 1.5 times will be described. Usually, the feed magnification is expressed by the ratio (V ₂ / V ₁ ) between the yarn feed speed (V ₁ ) and the winding speed (V ₂ ). In other words, a feed magnification of 1 means winding at the same speed as the feeding speed, and 1.5 times means winding up at a speed of 1.5 when the feeding speed is 1. is there. When the feed magnification is less than 1, it means that the feeding speed is larger than the winding speed, and the yarn is fed in a so-called overfeed state, so that the yarn is loosened between the feeding roller and the winding roller. Supplying the yarn by overfeeding is a technique that is often employed when twisting is considered in the twisting process of twisting the yarn, or when false twisting. However, it is usually performed with an overfeed of 5% or less.

  In the method of the present invention, a composite yarn is produced at a feed magnification as very high as 0.8. This is because the yarn used is rich in elasticity like a polyurethane yarn, and the polyurethane yarn is shipped, for example, in the case of cheese winding, since the yarn is wound in a stretched state when the cheese is wound, the feed magnification is 0. Even with a large overfeed such as 8, the yarn tends to return to its original length, so that the yarn does not loosen and normal processing can be performed. Even if an attempt is made to process a normal yarn having no elasticity under conditions such as a feed magnification of 0.8, the yarn is loosened and satisfactory work cannot be performed.

  Also, in the twisted yarn industry and false twist processing industry, when supplying yarn by overfeed, a minus sign (−) is often displayed in front of the magnification to indicate the degree of overfeed. In this case, it should be noted that (-) does not represent a negative numerical value, but merely indicates that the feed magnification is less than one. Even in the case of the present invention, −0.8 may be displayed in the industry, but this does not indicate a negative value, but has the same meaning as an overfeed rate of 0.8. Should be noted.

  Returning to the description of the method for producing the composite yarn. Covering bobbins 6, 6 'wound with insoluble yarn C or soluble yarn C' are inserted into the two hollow spindles. Both of the yarns wound around the two covering bobbins 6, 6 'may be insoluble yarn C, or both may be soluble yarn C'. Alternatively, a combination of one insoluble yarn C and one soluble yarn C ′ may be used. The aligned yarns of the yarn A and the yarn B guided to the first-stage hollow spindle 8 are covered with the first-stage covering yarn 7 between the first-stage balloon guide 9 and the yarn C or the thread C ′ a predetermined number of times. And then guided to the second-stage hollow spindle 8 ′ and covered with the second-stage balloon guide 9 ′ by the second-stage covering thread 7 ′ by the thread C or the thread C ′ a predetermined number of times. After that, it is wound around a composite yarn winding bobbin 12 via a deli roller 10 and a take-up roller 11.

  The composite yarn produced by the production method of the present invention is made into a core yarn in a state where the yarn A and the yarn B are aligned, and is covered with an insoluble yarn C or a soluble yarn C ′ around it and bundled into three pieces. Are integrated, the length of the thread A and the length of the thread B are fixed. The yarn B supports the tension applied to the composite yarn at once, and the yarn A, the yarn C, and the yarn C ′ do not contribute to supporting the tension. Therefore, even if this composite yarn is woven and knitted, the length of the yarn A hardly changes.

  When the yarn B is dissolved and removed from the woven or knitted fabric produced by the production method of the present invention, a space is formed between the elastic yarn A and the insoluble covering yarn C (sometimes referred to as a bundled yarn). . Thanks to the voids, the yarn A and the yarn C can easily expand and contract following the expansion and contraction of the woven or knitted fabric, so that the woven or knitted fabric has excellent stretchability.

  The effect of the composite yarn using the soluble yarn C ′ as the covering yarn in the present invention will be described. This composite yarn can be sufficiently woven and knitted, and after weaving and knitting, after dissolving and removing the soluble yarn in the knitted and knitted fabric, only the elastic yarn A remains, so that the woven fabric substantially composed of elastic yarn only. Become a knitted. In practice, weaving and knitting with substantially the elastic yarn A alone is impossible. This is because the elastic yarn is stretched by tension applied during weaving and knitting. In order to make a yarn that can be woven and knitted, a device has been devised in which the stretchable yarn and the soluble yarn are aligned and strongly twisted to temporarily suppress the elongation of the stretchable yarn. However, although the twisted yarn obtained in this way can suppress the elongation, it becomes a fixed yarn in a stretched state due to the tension applied during twisting, and the woven or knitted fabric using this yarn is soluble. If the yarn is dissolved and removed, variations in the width and length of the woven or knitted fabric cannot be prevented.

  According to the method of the present invention, the stretchable yarn A and the soluble yarn B, which are almost maintaining the original length, are bundled and integrated with the soluble yarn C in a state where they are aligned, so that weaving The elastic yarn A is not stretched by the tension applied during knitting, and can be woven or knitted while maintaining the original length. After weaving and knitting, if soluble yarn B 'or soluble yarn C' is used as the covering yarn, both soluble yarn B and yarn C 'are dissolved and removed, leaving only yarn A, as if only elastic yarn It shows the effect of weaving and knitting.

  Hereinafter, the case where the covering yarn C (bundled yarn) is an insoluble yarn will be described. In the knitted or knitted fabric obtained by the method for producing a woven or knitted fabric of the present invention, a gap is formed between the yarn A and the yarn C after dissolving and removing the dissolved yarn B in the composite yarn used for weaving and knitting. Moreover, since the state in which the yarn A and the yarn C are fixed is released, the free stretchability is recovered, and the yarn can be stretched and contracted following the expansion and contraction of the woven or knitted fabric. Furthermore, the woven or knitted fabric of the present invention does not shrink even after the yarn B is dissolved and removed, and the width and length of the woven and knitted fabric do not change from those before the yarn B is dissolved and removed.

  On the other hand, in the case of the invention disclosed in Patent Document 1, it is a composite yarn produced with the stretchable yarn stretched. In a woven or knitted fabric woven or knitted using this composite yarn, the soluble yarn is dissolved. Since the stretchable yarn contracts to the original length, the woven or knitted fabric contracts significantly due to the contraction force.

  In order to avoid the phenomenon of shrinkage, the composite yarn to be used is important. The elastic yarn A is preferably in a state as close to the original length as possible. Therefore, the feed magnification of the elastic yarn A of the composite yarn used in the present invention is set to 0.8 to 1.5 times. At a feed magnification of 0.8, it seems that the yarn A is fed in a relaxed state, but in reality it is not loosened because it tries to return to its original length from the stretched state. This is a unique operation in the present invention unique to stretchable yarns. The polyurethane yarn, which is a typical example of the yarn A that is generally marketed, is usually supplied in the form of cheese. Because the polyurethane yarn is wound in a slightly stretched state due to the tension applied during cheese winding, the yarn length before cheese winding is restored by overfeeding. The degree is estimated to be 0.8 times. Therefore, a feed magnification of 1 represents the length of the polyurethane yarn wound around cheese.

  When the feed magnification exceeds 1.5, the stretchable yarn A is supplied in a stretched state. Therefore, after the weaving and knitting, the soluble yarn B is dissolved and removed, so that the force that the yarn A tends to shrink increases, and the woven or knitted fabric Shrinkage of the width occurs, which is not preferable. Since the yarn C covers the periphery of the core yarn composed of the yarn A and the yarn B in a spiral manner, the yarn length is longer than the length of the yarn A and the yarn B, and the expansion and contraction of the woven or knitted fabric is affected. Sufficient yarn length is required to follow.

  Hereinafter, the present invention will be described in more detail. The elastic yarn A used in the method for producing a knitted or knitted fabric of the present invention has a high elongation at break, but has a property of returning to its original state when the tension is released after elongation within a specified range. Examples of fibers that can be used as the thread A include polyurethane fibers, polyester urethane fibers, polyether urethane fibers, copolymer fibers of ester urethane compounds and ether urethane compounds, polyolefin elastic fibers, and polybutylene terephthalate fibers. Natural rubber yarn, synthetic rubber yarn, polyvinyl chloride fiber, polyvinylidene chloride fiber and the like. Polyurethane fibers are preferably used in view of the extent of elongation, the extent of elongation recovery, versatility in the market, and the like. A combination of polyurethane fibers and other elastic yarns can also be used.

  The yarn B used in the production method of the present invention is a yarn that works to ensure the strength to withstand the tension applied during weaving and knitting, and must be a yarn that does not cut during weaving and knitting. Further, if the composite yarn is easily stretched by the tension applied at the time of producing the composite yarn, the width and length of the woven or knitted fabric after the soluble yarn is dissolved is not preferable. For this reason, the yarn B must be soluble, and a low elongation yarn is preferably used.

  Examples of the yarn satisfying these conditions include water-soluble polyvinyl alcohol-based synthetic fibers, alginic acid fibers, and cationic dye-dyed polyester fibers. Of these, water-soluble polyvinyl alcohol-based synthetic fibers are preferably used because of the ease of dissolution treatment. In the case of water-soluble polyvinyl alcohol-based synthetic fibers and alginic acid fibers, dissolution treatment is performed with water or warm water, and when cationic dye-dyed polyester fibers are used, dissolution treatment is performed with a weak alkaline aqueous solution. In this case, the yarn C must use an alkali-resistant fiber.

  The insoluble yarns C7 and 7 'of the composite yarn used in the present invention are yarns that have a function of binding the aligned yarns A and B by covering them, and are used for clothing and industrial applications. The thermoplastic synthetic fibers that can be used are preferably used. Of these, polyester fibers and nylon fibers are preferably used. Further, as a characteristic, it is preferable that the heat shrinkage rate is small. The reason for this is that after weaving and knitting an elastic fabric with this composite yarn, it is often heated in processing steps such as the dissolution and removal step of yarn B and the dyeing step of woven and knitted products. This is because the yarn contracts and the woven or knitted fabric contracts. Therefore, the yarn C7, 7 'preferably has a heat shrinkage of 30% or less under a condition of 180 ° C x 30 minutes. The yarns C7 and 7 'may be the same type of yarn or different types of yarns, but it is preferable to use the same type of yarn for work.

  After weaving and knitting, the woven or knitted fabric obtained by dissolving and removing the yarn B in the composite yarn is only the stretch yarn A and the bundle yarn C used. Comparing the length of the yarn A and the length of the yarn C, the yarn C is considerably longer than the yarn A because it is used as a covering yarn. When the yarn B is dissolved, the portion occupied by the yarn B becomes a space, and the yarn C used as a bundled yarn can move freely, and as a result, it can sufficiently cope with the expansion and contraction of the yarn A. . Therefore, the obtained woven or knitted fabric has excellent stretchability.

  When the soluble yarn C ′ is used as the covering yarn, the soluble yarn used as the core yarn B can be used as the yarn C ′. In this case, it is preferable to use the same type of the soluble yarn used for the core yarn and the soluble yarn used as the covering yarn, and it is preferable to use a water-soluble yarn in consideration of ease of work.

  Next, a method for producing the composite yarn used in the present invention will be described. FIG. 1 is a schematic view showing one embodiment of the present invention. The yarn A drawn from the bobbin 1 wound with the elastic yarn A is guided between the feed roller 3 and the yarn supply roller 5 to the first-stage hollow spindle 8 at a feed magnification of 0.8 to 1.5 times. On the other hand, the low-extension soluble yarn B is fed between the feed roller 4 and the yarn feeding roller 5 at a feed magnification of 1 to 1.05 times. The yarn A and the yarn B are drawn by the yarn supply roller 5, run in parallel, and guided to the first-stage hollow spindle 8. This aligned yarn is used as a core yarn.

  The feed magnification of the yarn A is preferably in the range of 0.8 to 1.5 times, more preferably around 1 time so that the woven or knitted fabric does not shrink after the soluble yarn B is dissolved. Some overfeeds may be applied depending on the purpose of use. The yarn B may be somewhat elongated due to the tension applied to the soluble yarn B depending on the yarn speed of the feed roller 4 and the yarn feeding roller 5, but the degree is within 30% or less of the breaking elongation of the yarn B. There is no problem when producing the film.

  If colored yarn is desired, the yarn C may be a composite yarn that is dyed and covered around the core yarn.

  As a method for bundling the composite yarn in the present invention, a covered yarn method using a covering machine using a hollow spindle is preferably used. Covering bobbins 6, 6 'wound with insoluble yarn C or soluble yarn C' are inserted into the hollow spindles 8, 8 '. The aligned yarns of the yarn A and the yarn B guided to the hole of the hollow spindle are single-covered with the yarn C a predetermined number of times between the first-stage hollow spindle 8 and the balloon guide 9 and then the second-stage hollow spindle. And the balloon guide 9 ′, and is wound around the composite yarn winding bobbin 12 through the delivery roller 10 and the take-up roller 11.

  Although FIG. 1 shows a case where there are two hollow spindles, a single single cover may be used if the core yarn can be sufficiently covered. In the case of double covering, the covering direction of the bundled yarn C may be the same direction, the first step may be the right direction, and the second step may be the left direction. If the core yarn is sufficiently covered with the bundled yarn C, it may be in the same direction or in a different direction. Further, although it is the degree of covering, it is preferable that the core yarn is entirely covered and the core yarn is not exposed, but if the core yarn may be exposed a little when it becomes a woven or knitted fabric. There is no problem.

  Hereinafter, the production method of the present invention will be specifically described by way of examples.

Example 1
An apparatus as shown in FIG. 1 was used. 310 dtex polyurethane yarn (made by Toray Industries, Inc.) as yarn A, 31 dtex water-soluble vinylon yarn (manufactured by Nichibi Co., Ltd., trade name: Solbron) as yarn B, and 56 dtex polyester filament processed yarn (made by Toray Industries, Inc.) as yarn C )It was used. The bobbin wrapped with polyurethane yarn and the bobbin wrapped with water-soluble vinylon yarn are set on the bobbin stand for core yarn of the covering machine base. The feed rate of polyurethane yarn is 1 times and the feed rate of water-soluble vinylon yarn is also 1 time. It was. These yarns were aligned to form a core yarn. This core yarn is led to two hollow spindles inserted with a bobbin wrapped with polyester filament processed yarn with a double cover method at a yarn speed of 3.8 m / min. The lower winding was 2000 T / m and the second winding hollow spindle was spirally covered and wound up so that the upper winding was 1500 T / m, and a composite yarn was obtained.

  The warp yarn was woven into a plain weave fabric with a weaving width of 204 cm at 45 yarns / inch of polyester filament processed yarn and 65 yarns / inch of a composite yarn obtained as weft yarn. Next, as a method of dissolving and removing the soluble yarn in the obtained woven fabric, a method of dissolving and removing the soluble yarn by soaking in 60 ° C. warm water for 10 minutes was adopted. As a result of measuring the weaving width when dried after the treatment and the shrinkage ratio of the width, the width of the fabric after the dissolution treatment was 198 cm and the width shrinkage ratio was 2.94%.

(Comparative Example 1)
A composite yarn obtained by using the same yarn as in Example 1 except that the feed magnification of polyurethane was doubled was woven so as to have the same woven structure as in Example 1 to obtain a woven fabric. The soluble yarn was dissolved under the same conditions, and the width of the fabric after drying was measured. The width of the fabric was 107 cm and the width shrinkage was 47.5%. From this result, it was found that the fabric width after the dissolution treatment of the fabric obtained by the method of the present invention contracted only slightly compared to the weaving width as compared with the case of Comparative Example 1.

(Example 2, comparative example 2)
The stretchability in the transverse direction of the fabric after the dissolution treatment obtained by the method of Example 1 was measured. The test was performed based on the method B of JIS-L-1096, 8.16.1. The stretch rate in the transverse direction of this fabric was 35%. When the load of this fabric was removed, it almost returned to its original length. As a control group, a plain weave fabric using 112 dtex polyester filament processed yarn instead of the composite yarn used in Example 1 was obtained, and when the elongation rate was measured by the same JIS method, the elongation rate was 1%. . From this result, it was found that the fabric using the composite yarn obtained by the method of the present invention had superior stretchability compared to the case of Comparative Example 2.

(Example 3, Comparative Example 3)
A knitted fabric was produced with a circular knitting machine using the composite yarn used in Example 1 and the composite yarn used in Comparative Example 1. The knitting machine was a single cylinder knitting machine having a hook diameter of 31.5 inches and 180 needles. The knitted fabric width after the knitted fabrics are soaked in 60 ° C. warm water for 10 minutes to dissolve and remove the soluble yarn and dried. The shrinkage ratio of the knitted fabric width using the composite yarn used in Example 1 is It was 4.9%. On the other hand, the shrinkage ratio of the knitted fabric width using the composite yarn used in Comparative Example 1 was 49.5%. From this result, it was found that the knitted fabric width using the composite yarn obtained by the method of the present invention hardly contracted as compared with the case of Comparative Example 3.

  The stretchable woven or knitted fabric obtained by the production method of the present invention was made and obtained by a completely different production method from the conventional stretchable woven or knitted fabric, as is apparent from the relationship between Examples and Comparative Examples. It was found that the characteristics of the woven or knitted fabric are also significantly different from those of the conventional stretch woven or knitted fabric. In the composite yarn produced by the production method of the present invention, the stretchable yarn in the composite yarn maintains almost the original length. The width of the knitted or knitted fabric has a feature that it hardly shrinks. Therefore, there is an advantage that a conventional weaving machine and a knitting machine can be used without a special weaving and knitting design and without using a special specification loom or knitting machine. In addition, a stable wide stretch woven or knitted fabric can be easily obtained without losing the aesthetic appearance, and the loss of the product can be reduced.

1 ...... Thread A bobbin 2 ...... Thread B bobbin 3 ...... Thread A feed roller 4 ...... Thread B feed roller 5 ...... Yarn feed roller 6 …… First stage covering bobbin 6 ′ …… Second stage covering Bobbin 7 ... 1st stage covering thread C or C '
7 '…… Second stage covering thread C or C'
8 …… First stage hollow spindle 8 ′ …… Second stage hollow spindle 9 …… First stage balloon guide 9 ′ …… Second stage balloon guide 10 …… Delivery roller 11 …… Take-up roller 12 …… Composite Thread winding bobbin

Claims (1)

  The elastic yarn A serving as the core yarn is supplied from a bobbin wound with the yarn A at a feed magnification in the range of 0.8 to 1.5 times, and the low elongation soluble yarn B serving as the other core yarn is 1 to 1 Supplied from a bobbin wound with thread B at a feed magnification in the range of 1.05 times and passed through a hollow spindle having a bobbin wound with insoluble thread C or soluble thread C ′ while running thread A and thread B side by side A first step of covering the periphery of the yarn A and the yarn B with the yarn C or the yarn C ′ to form a composite yarn, a second step of weaving and knitting the composite yarn, and the yarn B in the obtained knitted fabric A method for producing a stretchable knitted or knitted fabric, comprising a third step of dissolving and removing both the yarn B and the yarn C ′ when dissolved and removed or when the yarn C ′ is used as a covering yarn.