WO2006126669A1

WO2006126669A1 - Composite twist yarn

Info

Publication number: WO2006126669A1
Application number: PCT/JP2006/310538
Authority: WO
Inventors: Koichi Teshima; Masami Asano
Original assignee: Kuraray Trading Co., Ltd.; Asano Nenshi Co., Ltd.
Priority date: 2005-05-27
Filing date: 2006-05-26
Publication date: 2006-11-30
Also published as: JP4431083B2; JP2006328593A

Abstract

A composite twist yarn obtained by intertwisting plural spun yarns and a water-soluble yarn, which satisfies the following requirements: (1) the directions of twist of the plural spun yarns are the same, (2) the direction of twist of the composite twist yarn is opposite to that of the spun yarns, (3) the twist number of the composite twist yarn is 0.3 to 2 times that of the spun yarns, and (4) the mass ratio of the sum of the plural spun yarns to the water-soluble yarn is 98/2 to 40/60. Cloth is produced form a woven or knitted fabric comprising the composite twist yarn as the essential constituent yarn by dissolving the water-soluble yarn constituting the fabric in a hydrophilic solvent to remove the water-soluble yarn from the fabric.

Description

Specification

Compound twisted yarn

Technical field

[0001] The present invention relates to a composite twisted yarn and a woven or knitted fabric manufactured using the composite twisted yarn. More specifically, the present invention relates to a composite twisted yarn obtained by twisting a plurality of spun yarns and a water-soluble yarn, and a woven or knitted fabric obtained by dissolving and removing a water-soluble yarn from the composite knitted yarn with water. About. Background art

[0002] In knitted and knitted fabrics using spun yarns, composite yarns that combine spun yarns and polyurethane elastic yarns are widely used to impart stretchability to the woven or knitted fabrics. Typical examples are core spun yarn in which the core yarn made of polyurethane elastic yarn is covered with spinning cotton and twisted, and the spun yarn is wrapped around the core yarn also having polyurethane elastic yarn force. There are single-covered yarn and double-covered yarn wound around the layer, and pliers made by twisting two or more spun yarns and polyurethane elastic yarns, and these composite yarns can be used to produce elastic woven or knitted fabrics. Generally done.

[0003] However, since these conventional composite yarns use polyurethane elastic yarns with high stretchability, special devices and high techniques are required when handling yarns and weaving. In addition, since polyurethane elastic yarns are likely to deteriorate over time due to heat, light, etc., composite yarns using polyurethane elastic yarns and woven or knitted fabrics made of such composite yarns tend to lose their stretchability gradually. In addition, woven and knitted fabrics produced using polyurethane composite yarn often lack flexibility, soft texture, light weight, and the like. From such a point, a method for producing a stretchable woolen knitted fabric without using polyurethane elastic yarn has been proposed.

[0004] For example, in Japanese Patent Application Laid-Open No. 11-241269 (Patent Document 1), a fabric formed using a mixed yarn of wool fiber and water-soluble polyvinyl alcohol fiber is immersed in a room temperature water bath. However, a method for producing a stretchable woolen fabric is disclosed in which the temperature is raised while the water-soluble polyvinyl alcohol fiber is shrunk and then dissolved and removed, and then a set treatment is performed on the fabric containing only the woolen fiber. However, with this method, problems such as yarn breakage are likely to occur when weaving and knitting using a high-speed loom or knitting machine with low yarn strength of the mixed spun yarn. Also obtained woolen fabric Mechanical properties such as stretchability and strength of the fabric are also low. Furthermore, in this method, when other fibers such as cotton and synthetic fibers are used instead of wool, it is difficult to obtain a stretchable fabric.

[0005] European Patent No. 1061162B1 (Patent Document 2) describes a cashmere yarn for the purpose of improving the knitting property of a cashmere yarn and smoothly producing a woven or knitted product of cashmere, Combining a second yarn that is soluble in a weakly acidic aqueous solution at high temperature to form a composite yarn, weaving and weaving the composite yarn to produce a woven or knitted fabric, and then dissolving the second yarn from the woven or knitted fabric with an acid A method of removing and producing 100% cashmere fabric is disclosed. However, the 100% cashmere fabric obtained by this method is not sufficiently stretchable, and the second yarn is removed by acid, so that the remaining yarn is likely to deteriorate.

Patent Document 1: Japanese Patent Laid-Open No. 11 241269 (Claim 1)

Patent Document 2: European Patent No. 1061162B1 (Claim 1)

Disclosure of the invention

Problems to be solved by the invention

[0006] An object of the present invention is to provide a composite twisted yarn capable of producing a woven or knitted fabric having high stretchability and excellent properties such as lightness, flexibility and texture without using an elastic yarn such as polyurethane elastic yarn. And a production method thereof, and a woven or knitted fabric or fabric obtained by using this composite twisted yarn.

[0007] Another object of the present invention is that the spun yarn constituting the woven or knitted fabric is excellent in knitting and weaving without causing trouble such as yarn breakage even when weaving and knitting with a high-speed loom or knitting machine. Another object of the present invention is to provide a composite twisted yarn that is excellent in strength with no fiber omission and a method for producing the same, and a woven or knitted fabric or fabric obtained by using this composite twisted yarn.

[0008] Still another object of the present invention is to use various spun yarns such as spun yarn made of natural fiber, spun yarn made of synthetic fiber, spun yarn made of semi-synthetic fiber, etc. A composite twisted yarn capable of producing a composite twisted yarn of any thickness up to a thick count, a production method thereof, and a woven or knitted fabric or fabric obtained using this composite twisted yarn are provided. There is to do.

Means for solving the problem

[0009] The present inventors have intensively studied in order to achieve the above problems. And spun yarn Using a single yarn and a water-soluble yarn, the two are twisted together with a specific number of twists in the twist direction opposite to the twist direction of the spun yarn to produce a composite twisted yarn, and a woven or knitted fabric is produced from the composite twisted yarn. The water-soluble yarn in the woven or knitted fabric was dissolved and removed in water. As a result, although the polyurethane elastic yarn is not used, the spun yarn length is longer than that of the water-soluble yarn. A gap is created where the natural yarn has melted, and stretch is obtained by the gap, resulting in high stretch, and a soft and soft feel and texture. We were able to obtain a knitted or knitted fabric excellent in properties such as air permeability and air permeability.

[0010] Therefore, the present inventors have continued further research on the basis of the composite twisted yarn and the woven or knitted fabric thus obtained. Then, instead of using one spun yarn, use a plurality (two or more) of spun yarns (by aligning two or more spun yarns that are not twisted yarns). A new twisted yarn is produced by twisting the yarn in the direction opposite to the twisted direction of the spun yarn, and a woven or knitted fabric is produced using the twisted yarn, and the water-soluble yarn in the woven or knitted fabric is dissolved and removed with water. The experiment was conducted. As a result, when a composite twisted yarn is manufactured with two or more spun yarns twisted together with a water-soluble yarn, the number of twists in manufacturing the composite twisted yarn is reduced from one spun yarn and a water-soluble yarn. Even if it is less than the case of manufacturing, it is possible to obtain a composite twisted yarn that is excellent in handling and strength in knitting and weaving, etc., and by reducing the number of twists in manufacturing the composite twisted yarn, It has been found that productivity is improved along with improvement in twisting efficiency in production.

[0011] Further, the present inventors produce a woven or knitted fabric from a composite twisted yarn produced by twisting a plurality of spun yarns and a water-soluble yarn, and dissolve and remove the water-soluble yarn contained in the woven or knitted fabric with water. In the woven or knitted fabric obtained in this way, although the number of twists when producing a composite twisted yarn is small, the final woven or knitted fabric does not lose fiber from the spun yarn. It has been found that the strength of the woven or knitted fabric is maintained well. In addition, the woven or knitted fabric obtained by dissolving and removing the water-soluble yarn has high stretchability and fluffiness, as is the case with the woven and knitted fabric obtained by twisting a single spun yarn and a water-soluble yarn. It has been found that it has a good feel and feel and has excellent strength and lightness and air permeability.

[0012] Further, the present inventors, in such a composite twisted yarn, a plurality of the composite twisted yarn constituting the composite twisted yarn Weaving obtained by dissolving and removing water-soluble yarn in woven and knitted fabrics made from this composite twisted yarn by changing the type of spun yarn (for example, the type of fiber material, the thickness of spun yarn, other physical properties, etc.) The present inventors have found that a wide variety of characteristics and appearances can be expressed in the knitted fabric in addition to the above characteristics.

That is, the composite twisted yarn of the present invention is a composite twisted yarn obtained by twisting a plurality of (two or more) spun yarns and a water-soluble yarn, and (1) the twist directions of the plurality of spun yarns are the same. (2) The twist direction of the composite twisted yarn is opposite to the twisted direction of the spun yarn, and (3) the twist number of the composite twisted yarn is 0. (4) The ratio (mass ratio) of the total amount of the plurality of spun yarns to the water-soluble yarn is the total amount of the plurality of spun yarns Z water-soluble yarn = 98Z2 to 40Z60. The number of twists of the spun yarn is, for example, about 60 to 3000 times Zm. The water-soluble yarn may be a water-soluble filament yarn (particularly, a filament yarn composed of water-soluble polybulal alcohol fiber such as water-soluble ethylene-butyl alcohol copolymer fiber). The yarn count of the spun yarn may be about 5 to 200. The thickness of the water-soluble yarn may be about 15 to 2000 dtex.

[0014] The present invention relates to a method for producing a composite twisted yarn by twisting a plurality of spun yarns and a water-soluble yarn, wherein the plurality of spun yarns and the water-soluble yarn are aligned, and the number of twists of the composite twisted yarn is Also included is a method for producing the composite twisted yarn by twisting the spun yarn and the water-soluble yarn so that the number of twists of the spun yarn is 0.3 to 2 times.

[0015] The present invention also includes a method for producing a fabric in which a water-soluble yarn in a composite twisted yarn constituting the woven or knitted fabric is dissolved in a hydrophilic solvent and removed from at least the woven or knitted fabric formed of the composite twisted yarn. included. In this method, a woven or knitted fabric containing 10% by mass or more of the composite twisted yarn may be used as the woven or knitted fabric, and water may be used as the hydrophilic solvent.

[0016] Further, the present invention includes a fabric obtained by the above method.

The invention's effect

[0017] In the present invention, a woven or knitted fabric is produced from a composite twisted yarn obtained by twisting a plurality of spun yarns and a water-soluble yarn in spite of the fact that no polyurethane elastic yarn is used, and a water-soluble yarn in the woven or knitted fabric. Woven or knitted fabric or cloth that has high stretchability, softness, good feel and feel, and excellent properties such as lightness and breathability. A cloth can be obtained.

[0018] In the composite twisted yarn of the present invention, various spun yarns such as spun yarns made of other natural fibers, spun yarns made of synthetic fibers, spun yarns made of semi-synthetic fibers, etc. are not limited to spun yarns made of wool fibers. Spinned yarn can be used.

[0019] Further, the composite twisted yarn of the present invention is obtained by twisting a plurality of spun yarns and a water-soluble yarn with a specific twist number in a direction opposite to the twist direction of the spun yarn, and therefore the twist number is 1 Compared to a composite twisted yarn in which a spun yarn and a water-soluble yarn are twisted together, the composite twisted yarn has excellent strength and handleability during weaving. Since the number of twists can be reduced, the twisted yarn can be efficiently produced when producing the composite twisted yarn, and the productivity can be improved.

[0020] The composite twisted yarn of the present invention has an effect of suppressing fluff because a water-soluble yarn is present in the yarn, and the water-soluble yarn also plays a role of reinforcing strength. In addition, the strength and strength of using two or more spun yarns are excellent. For this reason, the composite twisted yarn of the present invention can be used for a woven or knitted fabric without causing troubles such as yarn breakage even when using a high-speed loom or knitting machine, and without performing a gluing process during warping. It can be manufactured smoothly with high productivity.

[0021] The composite twisted yarn of the present invention can be manufactured using any spun yarn from fine count to thick count, and by selecting the type and combination of the spun yarn used with two or more tensions, A variety of properties, texture, appearance, and the like can be expressed in the woven or knitted fabric after the water-soluble yarn finally obtained is dissolved and removed.

[0022] Since the composite twisted yarn and the stretchable woven or knitted fabric or fabric of the present invention do not contain polyurethane elastic yarn, there is no deterioration over time due to heat, light, etc. due to the use of polyurethane elastic yarn.

[0023] The fabric (or woven or knitted fabric) of the present invention can be obtained by treating a woven or knitted fabric containing a composite twisted yarn with water and dissolving and removing the water-soluble yarn in the composite twisted yarn with water. Therefore, since the fabric or woven or knitted fabric of the present invention has a spun yarn length longer than that of the water-soluble yarn, in the fabric or woven or knitted fabric after the water-dissolving treatment, an excess of the spun yarn is generated by that length. Elasticity is obtained. Furthermore, a gap is formed where the water-soluble yarn is melted, and the stretch is obtained by the amount of the gap, so that it has high stretchability, and the cocoon has an appearance, feel, breathability and light weight. Excellent in properties.

[0024] Furthermore, in the woven or knitted fabric obtained by dissolving and removing the water-soluble yarn in the woven or knitted fabric produced from the composite twisted yarn of the present invention with water, two or more spun yarns are in a state of being twisted together. , The fiber does not come off from the spun yarn constituting the fabric, and is excellent in strength and durability.

[0025] Therefore, the fabric or woven or knitted fabric of the present invention can be effectively used in a wide range of fields such as clothing use, medical use, and industrial materials, taking advantage of the aforementioned characteristics.

Detailed Description of the Invention

[0026] The present invention is described in detail below. The composite twisted yarn of the present invention is composed of a plurality of (two or more) spun yarns and water-soluble yarns. In the present invention, “a plurality of spun yarns” means two or more separated spun yarns, and a twisted yarn (not yet formed) of two or more spun yarns such as twin yarns or three or more spun yarns. Single yarn) is not included.

[0027] (Spun yarn)

The spun yarn constituting the composite twisted yarn of the present invention is not particularly limited as long as it is formed of fibers that do not dissolve in water (hot water, hot water, cold water), natural fibers, synthetic fibers, semi-synthetic fibers, regenerated fibers, Any of inorganic fibers may be used. These fibers can be used alone or in combination of two or more.

[0028] Examples of natural fibers include plant fibers such as cotton and hemp, and animal fibers such as silk, wool (wool), angora, cashmere, mojah, camel, alpaca, and feathers.

[0029] Examples of synthetic fibers include polyester fibers (polyethylene terephthalate fibers, polytrimethylene terephthalate fibers, polybutylene terephthalate fibers, aromatic polyester fibers such as polyethylene naphthalate fibers), polyamide fibers (polyamide 6, polyamides). 66, polyamide 11, polyamide 12, polyamide 610, polyamide 612 and other aliphatic polyamide fibers, alicyclic polyamide fibers, polyphenylene isophthalamide, polyhexamethylene terephthalamide, poly p-phenylene terephthalamide, etc. Aromatic polyamide fibers), polyolefin fibers (polyethylene, polypropylene, etc.)

2-4 In-fiber etc.), acrylic fiber (acrylonitrile-salt-bule copolymer, etc. acrylonitrile fiber with nitrile unit), water (hot water) insoluble polyvinyl alcohol fiber (ethylene) Butyl alcohol copolymer fibers, etc.), polyvinyl chloride fibers (poly salt vinyl, salt bis vinyl acetate copolymer, salt butyl nitrile fiber, etc.), Polysalt-vinylidene fibers (fibers such as salt-vinylidene monosalt-vinyl chloride copolymer, salt vinylidene vinyl acetate copolymer) [0030] Examples of the semi-synthetic fiber include acetate fiber such as triacetate fiber and promix fiber.

[0031] Examples of the recycled fiber include cellulosic recycled fibers such as rayon, polynosic, and cupra.

[0032] Examples of the inorganic fiber include glass fiber, carbon fiber, and metal fiber.

[0033] These fibers may be used alone or in combination of two or more, depending on the use of the composite twisted yarn and the fabric (woven or knitted fabric) produced using the same. Can be used. That is, the spun yarn may be a single spun yarn composed of these fibers or a mixed spun yarn composed of two or more kinds of fibers. Among these fibers, natural fibers such as cotton, wool, and silk, synthetic fibers such as polyamide fibers, polyacetal fibers, and acrylic fibers, semi-synthetic fibers such as acetate fibers, and regenerated fibers such as rayon and cuvula. General purpose.

[0034] Further, the composite twisted yarn of the present invention is composed of a plurality of (two or more) spun yarns, and the plurality of spun yarns may be spun yarns formed of the same type of fiber. It may be a combination of spun yarns formed from different types of fibers. For example, a combination in which a plurality of all spun yarns are the same type of fiber (for example, a combination in which a plurality of all spun yarns are cotton spun yarns, and a combination in which all of the plurality of spun yarns are spun yarns made of the same type of synthetic fibers). A part of the plurality of spun yarns are cotton spun yarns, and the remaining spun yarns are made of wool spun yarns, synthetic fiber spun yarns, and blended yarns of cotton and synthetic fibers. A combination of at least one selected from the group, a part of the plurality of spun yarns is a spun yarn composed of a specific synthetic fiber, and the remaining spun yarn is a different synthetic fiber. The combination which is the spun yarn comprised by is mentioned.

[0035] Of the plurality of spun yarns constituting the composite twisted yarn of the present invention, each spun yarn may be any one of single yarn, twin yarn, and three or more twisted yarns. For example, all of the plurality of spun yarns may be single yarns, all may be double yarns, or all may be three or more twisted yarns. Further, for example, some spun yarns of the plurality of spun yarns may be single yarns, and other spun yarns may be twin yarns or three or more twisted yarns, or some of the spun yarns The spun yarn is a double yarn Yes, and the other spun yarn may be three or more twisted yarns. In particular, the plurality of spun yarns are all single yarns, so that the process can be omitted when producing a composite twisted yarn, and the degree of freedom associated with the untwisting of the spun yarn is great. Point power that greatly contributes to

[0036] The number of twists of each spun yarn is not particularly limited. If the number of twists is T (unit: Z2. 54cm) and the cotton count is S (unit: count), it is expressed as K = TZ S. A spun yarn having a twist coefficient K of about 1.5 to 5 (preferably 2 to 4, more preferably 2.5 to 3.5) is used for the quality stability of the spun yarn, the productivity in the production of the composite twisted yarn, Point power such as availability is preferable.

[0037] The number of twists of each spun yarn is not particularly limited as long as the number of twists of the composite twisted yarn is 0.3 to 2 times that of any of the spun yarns. ~ 3000 times Zm, preferably ί 100-2000 times / m, more preferably <ί 200 ~ 1500 times / m (special 300 ~ 1300 times / m).

[0038] However, in the present invention, it is necessary for each spun yarn to satisfy the relationship between the number of twists of the composite twisted yarn and the number of twisted spun yarns. That is, the number of twists of each spun yarn may be different. Force Each number of twists needs to satisfy the above relationship. Therefore, for example, when two spun yarns A and B are used, if the number of twists of spun yarn A is 100 times Zm and the number of twists of spun yarn B is 1000 times Zm, the number of twists of spun yarn A is 0. 3 to 2 times is 30 to 200 times Zm, and the twist number of spun yarn B is 0.3 to 2 times 300 to 2000 times Zm, and the value is 0.3 to 2 times the twist number of spun yarn A and spinning. When using spun yarn A and spun yarn B with such a twist number that has a common portion (common numerical range) of the value of 0.3 to 2 times the twist number of yarn B, the twist of the composite twisted yarn The number (number of twists) does not satisfy the above-mentioned requirements defined in the present invention.

[0039] Here, the "twisted number of spun yarn" in the present invention means the number of twists of the last twist applied in the production of the spun yarn. For example, when the spun yarn is a single yarn, it means the number of twists that have been spun to produce a single yarn, and in the case of a double yarn, when two yarns are twisted together to produce a double yarn In the case of three or more twisted yarns, it means the number of twists when three or more yarns are twisted together to produce a twisted yarn.

[0040] When the spun yarn is a twin yarn or three or more twisted yarns, twin yarn or three yarns are considered from the viewpoints of twisted yarn productivity, yarn handling properties, texture, and availability of spun yarn. Of the above twisted yarn The twist direction of the last twist in the production is preferably opposite to the twist direction of the single yarn used for producing the double yarn or the twisted yarn. Furthermore, the number of twists of the final twist (the number of twists of the spun yarn referred to in the present invention; the number of twists when the twin yarn or the twisted yarn was produced) is the number of twists of the single yarn used for the production of the double yarn or the twisted yarn. 0.3 to 0.9 times (preferably 0.4 to 0.8 times)

[0041] Further, as the yarn count of the spun yarn, for example, yarns having a cotton count of 5 to 200, preferably 5 to 140, more preferably 10 to 120 are used in the production of the composite twisted yarn. Points such as smoothness or productivity, availability of spun yarn, market demand for the fabric to be produced are preferable.

[0042] (Water-soluble yarn)

The water-soluble yarn is not particularly limited as long as it has solubility in a hydrophilic solvent. In particular, it is soluble in water (hot water) at a pressure up to the boiling temperature of water (about 100 ° C) under atmospheric pressure. A thread is preferred. A woven or knitted fabric obtained from a composite twisted yarn containing such a water-soluble yarn can easily dissolve and remove the water-soluble yarn with a hydrophilic solvent such as water, and has excellent handling properties. In particular

As a water-soluble yarn, when the water-soluble yarn itself is immersed in hot water at a temperature of 80 ° C or higher (especially 90 ° C or higher) and left for 30 minutes, A water-soluble yarn in which 85% by mass or more, particularly 95% by mass or more is soluble in the hot water (a water-soluble yarn having a water-insoluble residue of less than 15% by mass, particularly less than 5% by mass) is preferable. The water solubility of water-soluble yarns is low, and even when a woven or knitted fabric produced using a composite twisted yarn is treated with a hydrophilic solvent such as water, the water-soluble yarn in the composite twisted yarn cannot be sufficiently dissolved and removed. It becomes difficult to impart sufficient stretchability and lightness to the knitted fabric.

[0043] The fiber constituting the water-soluble yarn is not particularly limited as long as the water-solubility is satisfied. For example, a fiber made of water-soluble rosin can be used. Fibers composed of water-soluble rosin include cellulosic fibers (such as hydroxy C alkyl cellulose fibers such as hydroxymethylcellulose) and bulle fibers (polybulurpyrrolidone, polybulul).

13

Acrylic monomers such as ethers, polybulal alcohol fibers, polyblucetal fibers), acrylic copolymers or alkali metal salts thereof ((meth) acrylic acid hydroxyl group-containing (meth) acrylic acid esters) A copolymer containing units composed of Water-soluble polyamide fibers (polyamide fibers having polyoxyethylene units, polyamide fibers introduced with sulfonic acid groups or hydroxyl groups, etc.), water-soluble polyester fibers (polyester fibers having polyoxyethylene units, sulfonic acids, etc.) And polyester fibers into which an amino group is introduced). The fibers composed of these water-soluble rosins can be used alone or in combination of two or more. Further, the fiber composed of the water-soluble resin may be a fiber composed of an alloy in which a plurality of water-soluble resins are combined.

[0044] Among these, the bulle fiber, particularly the water-soluble polybulal alcohol fiber is preferable from the viewpoints of fiber strength, high solubility in water (hot water), biodegradability, and availability. The water-soluble polybulal alcohol fiber is not particularly limited as long as it is a fiber (water-soluble polyvinyl alcohol fiber) composed of a water-soluble polyvinyl alcohol-based resin mainly composed of a bull alcohol unit. A water-soluble polyvinyl alcohol-based resin does not allow melt spinning because the thermal decomposition temperature and the melting start temperature are close to each other. Therefore, in the present invention, melt-spun water-soluble polybutyl alcohol, for example, a polymerization degree is reduced to about 200 to 800 (especially 250 to 500), and olefins (especially Ca-olefins such as ethylene) are reduced. 3-20 mole ^_0/0 (in particular 3-15 mol ^_0/0) degree co

2-10

Polymerized polyvinyl alcohol-based resin (especially water-soluble ethylene-vinyl alcohol copolymer fiber) is preferably used. Fibers composed of water-soluble polybulal alcohol-based rosin are commercially available as, for example, water-soluble vinylon. Since water-soluble polybutyl alcohol fiber is biodegradable, the waste liquid discharged when the polybutyl alcohol fiber is dissolved and removed from the woven or knitted fabric with water can be smoothly treated and purified by microorganisms. .

[0045] The water-soluble yarn may be a spun yarn or a filament yarn as long as it is water-soluble. When the water-soluble yarn is a spun yarn, the twist direction is preferably the same as the twist direction of the composite twist yarn. If the twisting directions of both yarns are the same, the length of the non-water-soluble spun yarn in the composite twisted yarn can be increased, and the stretchability of the fabric can be improved.

[0046] The water-soluble yarn may be a spun yarn, but a filament yarn is more preferable. The advantage of filament yarn is that even when the blending ratio of water-soluble yarn in the composite twisted yarn is low, the composite twisted yarn When the woven or knitted fabric produced from the yarn is treated with a hydrophilic solvent such as water to dissolve and remove the water-soluble yarn, the water-soluble yarn is removed quickly and well, and the yarn strength of the composite twisted yarn is increased. In addition, it is easy to use spun yarn with fine counts, and it can be used at a low mixing rate, so that costs can be reduced.

[0047] The thickness of the water-soluble yarn is, for example, about 15 to 200 dtex, preferably 20 to 150 dtex, more preferably 25 to about LOOdtex. When the thickness of the water-soluble yarn is within this range, it is easy to twist with the spun yarn, the strength of the composite twisted yarn, the reduction of the spinning fluff, and the dissolution and removal of the water-soluble yarn from the woven or knitted fabric formed from the composite twisted yarn. The ease of use, the stretchability of the fabric after dissolving the water-soluble yarn, and the productivity of the water-soluble yarn can be improved.

[0048] In the composite twisted yarn of the present invention, the removal yarn constituting the composite twisted yarn (the yarn to be removed after forming the woven or knitted fabric) is a hydrophilic solvent such as water, which is not a yarn that dissolves or decomposes in alkali or acid. The reason for using the soluble yarn (water-soluble yarn) is that, when treated with alkali or acid to remove part of the composite twisted yarn that forms the woven or knitted fabric, the spinning that constitutes the composite twisted yarn There is a possibility that the yarn may be altered or decomposed, but when treated with a hydrophilic solvent such as water (especially water), there is no possibility that the spun yarn will be altered or decomposed. In the present invention, by using such a water-soluble yarn, a wide variety of spun yarns can be used as the spun yarn constituting the composite twisted yarn. That is, as long as the spun yarn constituting the composite twisted yarn is not soluble in a hydrophilic solvent such as water, it can be used even if it is easily dissolved or decomposed by alkali or acid. As a result, the types of spun yarns and the range of selections can be expanded, and as a result, the types, characteristics, and textures of the woven and knitted fabrics formed from the composite twisted yarns can be varied.

[0049] (Composite twisted yarn)

The composite twisted yarn of the present invention is obtained by twisting a plurality (two or more) of spun yarn and a water-soluble yarn. The number of spun yarns (number of yarns) constituting the composite twisted yarn needs to be 2 or more. For example, 2 to 5 yarns, preferably from the viewpoint of limiting the number of krills of the twisting machine, quality control, etc. 2 to 4, more preferably 2 to 3 (particularly 2). That is, in the present invention, a composite twisted yarn can be obtained by aligning and twisting two or more spun yarns and a water-soluble yarn.

[0050] The composite twisted yarn of the present invention is formed by using two or more spun yarns. Handling and strength during weaving and weaving while maintaining the number of twists (number of top twists) when producing composite twisted yarns in the direction opposite to the twisting direction of the yarn at a value as small as 0.3 to 2 times that of the spun yarn It is possible to produce composite twisted yarns with excellent productivity with high twisting efficiency. In the woven or knitted fabric obtained by dissolving and removing the water-soluble yarn from the woven or knitted fabric of the present invention with a hydrophilic solvent such as water, the two or more spun yarns are in a twisted state. Since the yarn is untwisted while being spun, the fibers forming the spun yarn are prevented from coming off, and the strength of the spun yarn, and thus the strength of the woven or knitted fabric, can be kept high.

[0051] Further, the number of water-soluble yarns is, for example, from the viewpoint of reducing the number of krills of a twisting machine, and from the viewpoint of easiness of dissolving and removing water-soluble yarns of woven and knitted fabric made from composite twisted yarns. ~ 3, preferably about 1-2, and usually one.

[0052] Further, in the composite twisted yarn of the present invention, the twist directions of the plurality of spun yarns all have the same twist direction, and the twist direction of the composite twisted yarn (two or more spun yarns and a water-soluble yarn are used). The twist direction at the time of twisting; the direction of the upper twist) is opposite to the twist direction of the spun yarn (hereinafter, the twist of the spun yarn may be referred to as “bottom twist”). In the composite twisted yarn in which the twist direction of each spun yarn in two or more spun yarns is the same direction, the twist direction of the upper twist yarn is twisted in the opposite direction to the twist direction of the lower twist yarn, all the spun yarns Is partially or completely untwisted and longer than the original spun yarn. Therefore, high stretchability is imparted to the woven or knitted fabric obtained by dissolving and removing the water-soluble yarn with a hydrophilic solvent such as water from the woven or knitted fabric produced using the composite twisted yarn of the present invention.

[0053] On the other hand, when the twist directions of two or more spun yarns are different from each other (for example, a total of two spun yarns, one spun yarn of S twist and one spun yarn of Z twist, were used. When using three spun yarns, one S-twisted yarn and two Z-twisted spun yarns, a total of three S-twisted spun yarns and one Z-twisted spun yarn For example, when using spun yarn), twisting the spun yarn and water-soluble yarn to produce a composite twisted yarn (hereinafter sometimes referred to as “top twist”) in either the S or Z direction. Even so, one of the two or more spun yarns (spun yarn having a twist direction opposite to the upper twist) is untwisted, but the remaining spun yarn (having the same twist direction as the upper twist) In the case of (spun yarn), the twist is more strongly applied in the same direction than before the upper twist is applied. Therefore, weaving and knitting force water-soluble yarns made using such composite twisted yarns Even if it is removed by dissolution with an aqueous solvent, a highly woven or knitted fabric cannot be obtained, the texture of the woven or knitted fabric becomes stiff, and the strength is insufficient in terms of lightness and air permeability.

[0054] Further, in the composite twisted yarn of the present invention, the number of twists of the composite twisted yarn (the number of twists of the upper twist) is 0.3 to 2 times the number of twists of each of the two or more spun yarns. It is necessary to be in the range of about, preferably 0.3 to 1.75 times, more preferably about 0.5 to 1.3 times.

[0055] For example, in the case of producing the composite twisted yarn of the present invention by twisting (up-twisting) two 600m Zm (Z twisted) spun yarns and a water-soluble yarn, the two spun yarns and the water-soluble yarn are produced. The twisted yarn is twisted 600 times ZmX (0.3 to 2 times) = 180 to 1200 times Zm in the S direction to make the composite twisted yarn of the present invention.

[0056] In addition, for example, a spun yarn A of 500 times Zm (S twist) and a spun yarn B of 800 times Zm (S twist) and two spun yarns having different numbers of V ヽぅ twists are combined with a water-soluble yarn and the Z direction. When twisting together (up twisting) to produce the composite twisted yarn of the present invention, 500 times ZmX (0.3 to 2 times) = 150 to 1000 times Zm and 800 times ZmX (0.3 to 2) Times) = 240 to 1600 times Zm is a common numerical range of 24 0 to: L000 times Zm in the range of Zm is applied to form the composite twisted yarn of the present invention.

[0057] In the present invention, a composite twisted yarn is produced by twisting the upper twisted yarn in a direction opposite to the twisting direction of the lower twisted yarn and a twist number in the range of 0.3 to 2 times the twisted number of the lower twisted yarn. When twisting together (when the upper twist is applied), the upper twist works in the direction of untwisting the spun yarn (the lower twist) while maintaining the shape stability (twisting stability) of the composite twisted yarn. During the upper twisting, the yarn length of the spun yarn is increased, while the water-soluble yarn is twisted to shorten the yarn length. As a result, even when the twist of the spun yarn is further twisted from 0, the spun yarn is twisted in a state where the relationship of the yarn length of the spun yarn> the yarn length of the water-soluble yarn is maintained. As a result, weaving and knitting can be performed well when producing woven or knitted fabrics from composite twisted yarns, and both the weaving and knitting forces obtained by weaving and weaving are dissolved and removed with water-soluble yarns such as water. As a result, a woven or knitted fabric with increased elasticity, a soft texture, and excellent lightness and breathability can be obtained.

[0058] If the number of twists of the upper twist in the composite twisted yarn is too smaller than the number of twists of the lower twist (twisted number of the spun yarn), the untwisting of the spun yarn is insufficient at the time of twisting for producing the composite twisted yarn. In addition, the twisting of the water-soluble yarn is insufficient, so that the twisting process in producing the composite twisted yarn is not stable, and the resulting composite twisted yarn has spots, and the strength is also determined using such a composite twisted yarn. From woven and knitted fabrics Even if the water-soluble yarn is dissolved and removed with water, a stretchable woven or knitted fabric cannot be obtained. On the other hand, if the number of twists of the upper twist in the composite twisted yarn is too larger than the number of twists of the lower twist (twisted number of the spun yarn), the twisting process for applying the upper twist (a twisting process for producing the composite twisted yarn) This may cause problems such as yarn breakage, which may lead to reduced productivity of composite twisted yarn, reduced strength of the obtained composite twisted yarn, process failure during weaving using the composite twisted yarn, etc. This lowers the productivity when producing composite twisted yarn.

[0059] The "twist number of the composite twisted yarn" (the twist number of the upper twist) in the present specification is the number of twists when a plurality of spun yarns and a water-soluble yarn are twisted together. Is a value according to the set number of twists during the twisting process.

[0060] Specifically, the number of twists of the composite twisted yarn is not particularly limited, but is, for example, about 60-30000 / m, preferably about 100 to 2000 times Zm, and more preferably about 200 to 1500 times Zm.

[0061] The type of the twisting machine used to produce a composite twisted yarn by twisting a plurality of spun yarns and water-soluble yarns is not particularly limited. For example, a conventional general-purpose twisting machine such as a double twister, a ring twister, or an up twister. Can be used.

[0062] The composite twisted yarn of the present invention may have torque. If the twisted yarn does not interfere with the knitting and weaving process even if it has torque, it is used for the production of woven or knitted fabric without reducing the torque. be able to. In the case where the torque is hindered in the weaving and weaving process, it is preferable to reduce the torque by heat treatment. The heat treatment temperature at that time can be appropriately determined depending on the kind of spun yarn and water-soluble yarn constituting the composite twisted yarn, the strength of the torque of the composite twisted yarn, and the like.

[0063] In the composite twisted yarn of the present invention, the ratio (mass ratio) of the spun yarn to the water-soluble yarn is the total amount of the plurality of spun yarns Z water-soluble yarn = 98Z2 to 40Z60, preferably 95 to 5 to 50 to 50, and more preferably Is about 90Ζ10 ~ 60Ζ40. When the ratio of both yarns is within such a range, a composite twisted yarn excellent in knitting and weaving property, yarn strength, twist stability, etc. can be obtained. When the water-soluble yarn in the woven or knitted fabric produced by the composite twisted yarn is dissolved and removed with water, the water-soluble yarn is removed well, and the strength of the water-soluble yarn is also reduced. The removed gap can improve stretchability, and at the same time, the texture, feel, lightness and breathability of the woven or knitted fabric can be improved.

[0064] If the proportion of the water-soluble yarn in the composite twisted yarn is too small (the proportion of the spun yarn is less than the above range) In many cases, the strength of the woven or knitted fabric produced from the composite twisted yarn decreases the stretchability, lightness, air permeability, etc. of the woven or knitted fabric after removing the water-soluble yarn, and the strength is also stiff and tends to be inferior. On the other hand, if the proportion of the water-soluble yarn in the composite twisted yarn is too large (the proportion of the spun yarn is too small), the woven / knitted fabric produced from the composite twisted yarn will have a form stability after removing the water-soluble yarn. It is easy to cause a drop in eyes.

[0065] (Woven and knitted fabric (fabric) and manufacturing method thereof)

In the present invention, a woven or knitted fabric having high stretchability can be produced by using the composite twisted yarn. The type and organization of the woven or knitted fabric (fabric) of the present invention are not particularly limited, and examples thereof include woven fabrics (plain weave, oblique weave, satin weave, etc.) and knitted fabrics (machine knitting, crochet knitting, bar needle) Knitting, Afghan knitting, lace knitting, etc.). Since the composite twisted yarn of the present invention has high yarn strength, for example, troubles such as yarn breakage do not occur even when a woven or knitted fabric is produced by a high speed loom or knitting machine (for example, a weaving speed or a knitting speed of 0.05 mZ or more) Therefore, productivity is high.

[0066] The woven or knitted fabric of the present invention is manufactured using at least the composite twisted yarn, and the usage ratio of the composite twisted yarn is adjusted in accordance with the type and application of the target woven or knitted fabric (required degree of expansion and contraction, etc.). be able to. In order to obtain a woven or knitted fabric having high elasticity, the ratio of the composite twisted yarn to the woven or knitted fabric is, for example, 10% by mass or more (for example, 10 to: LOO% by mass) ), Preferably 20% by mass or more (for example, 20 to 100% by mass), more preferably about 25% by mass or more (for example, 25 to: LOO% by mass). As will be described later, the water-soluble yarn can be extracted and removed with a hydrophilic solvent, but the ratio of the composite twisted yarn in the woven or knitted fabric is a value including the water-soluble yarn. If the ratio of the composite twisted yarn in the woven or knitted fabric is too low, it is difficult to obtain a highly stretchable fabric (woven or knitted fabric) even if the water-soluble yarn is removed.

[0067] In the present invention, a fabric having high stretchability can be obtained by extracting and removing a water-soluble yarn in a composite twisted yarn from a woven or knitted fabric using the composite twisted yarn with a hydrophilic solvent. Hydrophilic solvents include water, alcohols (methanol, ethanol, isopropanol, etc.), ketones (acetone, etc.), ethers (tetrahydrofuran, etc.), cellosolves (methyl cellosolve, ethyl acetate mouthsolve, etc.), carbitols (Carbitol, diethylene glycol dimethyl ether, etc.). These hydrophilic solvents can be used alone or Two or more types can be used in combination. Among these hydrophilic solvents, water, alcohols such as ethanol, ketones such as acetone, and mixed solvents of water and other hydrophilic solvents.

13

Usually water is used.

[0068] The method of extracting (dissolving and removing) the water-soluble yarn is not particularly limited, but may be a method of immersing in a high-temperature hydrophilic solvent from the viewpoint that the water-soluble yarn can be efficiently removed by a simple method. . When water is used as the hydrophilic solvent, the extraction water may be neutral or may be an alkaline or acidic aqueous solution. Moreover, the aqueous solution which added surfactant etc. may be sufficient.

[0069] The extraction treatment temperature can be adjusted according to the type of fiber constituting the water-soluble yarn, the solubility in the solvent, the shape and thickness of the yarn, and the like. When extracting the constituted water-soluble yarn, it is, for example, about 40 to 120 ° C, preferably 50 to 110 ° C, more preferably 60 to 100 ° C (particularly 70 to 100 ° C). . By treating at such a temperature, the water-soluble yarn can be quickly removed from the woven or knitted fabric in a short time. If the treatment temperature is too low, the extractability of the water-soluble yarn is insufficient and the productivity is lowered. If the treatment temperature is too high, the dissolution time of the water-soluble yarn becomes extremely short, and the quality of the woven or knitted fabric tends to deteriorate.

[0070] The ratio of the hydrophilic solvent is 2 times (weight basis) or more with respect to the woven or knitted fabric, for example, 2 to 1,000 times, preferably 3 to: LOO times, more preferably about 5 to 50 times. is there. If the amount of the hydrophilic solvent is too small, removal of the water-soluble yarn will be insufficient. If extraction and removal are insufficient, the water-soluble yarn may be extracted and removed again in a hydrophilic solvent bath using a fresh hydrophilic solvent not containing water-soluble yarn! / ヽ.

[0071] The extraction processing time can be appropriately adjusted according to the purpose, the apparatus to be used, and the processing temperature. For example, considering the production efficiency, stability, quality of the resulting knitted fabric, performance, etc. 1 to 300 minutes, preferably 5 to 200 minutes, more preferably 10 to about LOO minutes (especially 15 to 60 minutes).

[0072] The woven or knitted fabric (fabric) after the extraction treatment of the water-soluble yarn may be naturally dried, but is preferably dried by heating from the viewpoint of improving the feel and breathability of the fabric. The drying temperature can be appropriately selected according to the type of fiber constituting the woven or knitted fabric, and is, for example, 60 ° C or higher, preferably 80 to 200 ° C, more preferably 100 to 180 ° C (particularly 120 to 160 ° C). C) degree. Dry The drying time is, for example, about 0.5 minute to 24 hours, preferably about 1 minute to 10 hours, and about 3 minutes to 1 hour.

[0073] It should be noted that such a treatment with a hydrophilic solvent is performed before the step of dyeing the woven or knitted fabric or attaching the resin to the woven or knitted fabric in terms of the smoothness of the production process and the quality of the woven or knitted fabric. Is preferred. If the water-soluble yarn is extracted during the dyeing process or after these processes, the water-soluble thread is not sufficiently removed while the dyeing process is hindered in the resin adhesion process.

[0074] In the woven or knitted fabric (fabric) of the present invention, if necessary, stabilizers (thermal stabilizer, ultraviolet absorber, light stabilizer, antioxidant, etc.), fine particles, colorant, antistatic agent, difficult Additives such as flame retardants, plasticizers, lubricants, crystallization rate retarders may be included. These additives can be used alone or in combination of two or more. These additives may be contained in any of the yarns constituting the composite twisted yarn, the composite twisted yarn, and the woven or knitted fabric.

[0075] The fabric (woven or knitted fabric) obtained in this way has an increased length and freedom of spun yarn that has been untwisted in the space where the water-soluble yarn was present and the upper twist in the opposite direction. Due to the synergistic effect such as increasing the degree of elasticity, it has a good feel with high elasticity and swell, and is also excellent in light weight and breathability.

[0076] In the fabric after the water-soluble yarn is dissolved and removed with water, the two or more spun yarns constituting the composite twisted yarn remain in the woven or knitted fabric in the form of a twisted yarn in which they are twisted together. As a result, the fibers forming the spun yarn are not lost, and the strength is maintained.

Industrial applicability

[0077] The composite twisted yarn of the present invention is excellent in knitting and weaving properties, and troubles such as yarn breakage do not occur when a woven fabric or knitted fabric is produced. By removing the water-soluble yarn in the knitted fabric by dissolving it in a hydrophilic solvent such as water, it has high stretchability, is soft and has a good feel and feel, and is lightweight and breathable. The composite twisted yarn of the present invention is superior to the above-described highly stretchable woven or knitted fabric because it has excellent properties and further, a fiber fabric from the spun yarn that forms the woven or knitted fabric does not occur and an excellent woven or knitted fabric is obtained. It can be used effectively in manufacturing.

[0078] The fabric obtained as described above is energized with such characteristics, for example, clothing (sports It can be used effectively for clothing, underwear, foundation, tights, socks, etc., medical materials (elastic bandages, etc.), vehicle materials (vehicle interior materials, etc.), industrial materials (belt conveyor fabrics, etc.).

Example

[0079] The ability to specifically describe the present invention by way of examples and the like. The present invention is not limited to the following examples. In the following Examples and Comparative Examples, the elongation rate of the fabric (plain woven fabric) was measured as follows.

[0080] [Elongation rate of fabric]

(1) From the fabric manufactured in the following example, a test piece (a) having a longitudinal dimension of 15 cm (length) and a weft dimension of 2.5 cm (width), and a longitudinal direction of the fabric Specimens (b) each having a dimension of 2.5 cm (width) and a weft dimension of 15 cm (length) were cut out.

[0081] (2) The end of the test piece (a) cut out in (1) above with an lg weight attached to the center of the one end in the length direction (the center in the width direction). The test piece was hung vertically and left in that state for 1 minute, and the length (La) of the test piece (a) at that time was measured.

[0082] Next, remove the end weight of the test piece (a) from the lg weight, and instead attach a 300 g weight at the same location and hang it vertically and leave it in that state for 3 minutes. Measure the length (La) (cm) of (a) and calculate the following mathematical formula (i)

2

It was.

[0083] Elongation rate in the warp direction (%) = {(La -La) / La} X 100 (i)

2 1 1

(3) Attach an lg weight to the center (the center in the width direction) of one end in the length direction of the specimen (b) cut out in (1) above, with the end with the weight facing down. The test piece was suspended vertically and left in that state for 1 minute, and the length (Lb) of the test piece (b) at that time was measured.

[0084] Next, the lg weight is removed from the end of the test piece (b). Instead, a 300 g weight is attached to the same location and hung vertically and left in that state for 3 minutes. The length (Lb) (cm) of (b) is measured, and the elongation rate (%) in the weft direction of the fabric is obtained from the following formula (ii).

2

I tried.

[0085] Elongation rate in the weft direction (%) = {(Lb -Lb) / Lb} X 100 (ii)

2 1 1

Example 1 (1) (i) As a spun yarn, we prepared a 40th spun yarn (“TS40 single yarn” manufactured by Tsuzuki Spinning Co., Ltd.) with 800% Zm (Z twist) cotton 100%. This spun yarn has 2.5 twists per 54cm T = 20.32 times and count S = 40. Therefore, the twist coefficient Κ calculated from the formula:: = (ΤΖ S) is 20. 32 / ^ 40 = 20. 32/6. 32 = 3.22.

[0086] (ii) As a water-soluble yarn, polybulal alcohol multifilament yarn (56dtex) (dissolved in water at 80 ° C) (manufactured by Kuraray Co., Ltd., "water-soluble vinylon") was prepared.

[0087] (2) Double twister (Murata Kikai Co., Ltd.)

(36M) manufactured by Co., Ltd.) and twisted so that the number of twists (upper twist) is 700 times Zm (S twist) to produce a composite twisted yarn. Number) = 0.875 times the number of yarn twists].

[0088] (3) A yarn of a predetermined length (lm) is cut from the composite twisted yarn obtained in (2) above to obtain a sample yarn, and the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn are separated. Separated into two types of yarn, the mass of each separated yarn was measured, and the result of measurement was determined. When the ratio of each yarn in the composite twisted yarn was determined, the composite twisted yarn was 84% by weight (2 spun yarns). The total weight of the yarn) and the water-soluble yarn 16% by weight.

[0089] (4) Using the composite twisted yarn obtained in (2) above as a warp and weft, weaved a plain weave fabric of warp 25 Zcm, 20 weft Zcm (100% of composite twist yarn in plain weave fabric is 100% ). In this weaving process, weaving plain weave without any troubles such as yarn breakage at high speed was a powerful problem (weaving speed of 0.1 lmZ).

[0090] (5) The plain weave fabric obtained in (4) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. The stretch rate in the warp direction and the weft direction of the fabric thus obtained was measured by the above method. The stretch rate in the warp direction was 22% and the stretch rate in the weft direction was 23%. It was. In addition, the fabric was soft and soft, had excellent lightness and breathability, and was also excellent in the strength that the cotton fibers of the fabric could not be removed.

[0091] Example 2

(1) Cotton No. 40 twin yarn is used as the warp, and the composite twisted yarn obtained in (2) of Example 1 is used as the weft. A plain weave fabric with a warp of 25 cm and a weft of 20 cm was woven (40% by mass of the composite twisted yarn in the plain fabric). In this weaving process, it was possible to weave a plain weave fabric without any troubles such as thread breakage at high speed, and there was no problem in weaving mass production (weaving speed of 0.1 lmZ).

[0092] (2) The plain weave fabric obtained in (1) above is immersed in hot water at 90 ° C. for 15 minutes (bath ratio = 1: 15), and water in the composite twisted yarn forming the weft of the fabric The sex yarn was dissolved and removed, then washed with hot water at 60 ° C. for 10 minutes (bath ratio = 1: 15), and then the fabric was taken out of the water and dried at 150 ° C. As a result of measuring the elongation in the warp direction and the weft direction of the fabric obtained by the above method, the stretch rate in the warp direction was 11% and the stretch rate in the weft direction was 23%. Had. In addition, the fabric was fluffy and excellent in texture, strength, lightness and breathability. In addition, the weft strength of the weft yarn, which does not come off the cotton yarn of the weft force forming the fabric, was excellent.

[0093] Example 3

(1) Prepare a 40th spun yarn (manufactured by Tsuzuki Spinning Co., Ltd., "TS40 single yarn") with 100% cotton Zm (Z twist) of 800 turns. Supply one used polyvinyl alcohol multifilament yarn to a double twister (Murata Kikai Co., Ltd. “36M”) so that the number of twists (upper twist) is 300 times / m (S twist). A composite twisted yarn was produced by twisting together [number of twists of composite twisted yarn (upper twisted number) = 0.375 times the number of twisted spun yarns].

[0094] (2) A yarn of a predetermined length (lm) is cut from the composite twisted yarn obtained in (1) above to obtain a sample yarn, and the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn are separated. It was separated into two types of yarn, and the mass of each separated yarn was measured, and the result of measurement was determined. The ratio of each yarn in the composite twisted yarn was determined. This composite twisted yarn was 86% by weight spun yarn and water-soluble yarn. 14% by mass.

[0095] (3) Cotton Weft No. 40 yarn was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft to weave a plain weave fabric of warp 25cm and weft 20cm. 40% by mass of mixed twisted yarn in plain weave fabric). In this weaving process, plain weaving fabrics that could cause troubles such as thread breakage could be woven at high speed, and there was no problem in weaving mass production (weaving speed of 0.1 lmZ). [0096] (4) The plain weave fabric obtained in (3) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, and then washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. The stretch rate in the warp direction and the weft direction of the fabric thus obtained was measured by the above-mentioned method. Had. In addition, this fabric was fluffy, excellent in texture, light and breathable. In addition, the weft strength of the weft yarns, which were not removed by the cotton fibers of the weft force forming the fabric, was also excellent.

[0097] Example 4

(1) Prepared a 40th spun yarn (800mm) of Zm (Z-twisted) 100% cotton (“TS4 0 single yarn” manufactured by Tsuzuki Spinning Co., Ltd.), and used these two spun yarns and Example 1 One polyvinyl alcohol multifilament yarn is fed to a double twister (“36M” manufactured by Murata Machinery Co., Ltd.) and twisted so that the twist number (upper twist) is 1400 times Zm (S twist). To produce composite twisted yarn [twisted number of composite twisted yarn (upper twisted number) = 1.75 times the twisted number of spun yarn].

(2) A predetermined length (lm) of yarn is cut from the composite twisted yarn obtained in (1) above to obtain a sample yarn, and the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn are separated. It was separated into two types of yarns, and the mass of each separated yarn was measured, and the result of measurement was determined. The ratio of each yarn in the composite twisted yarn was determined. The composite twisted yarn was 84% by weight spun yarn and water-soluble yarn. From 16% by mass.

[0099] (3) A plain weave fabric of warp 25 Zcm and weft 20 Zcm was woven using cotton No. 40 double yarn as warp and the composite twisted yarn obtained in (1) above as weft ( 40% by mass of mixed twisted yarn in plain weave fabric). In this weaving process, plain weaving fabrics that could cause troubles such as thread breakage could be woven at high speed, and there was no problem in weaving mass production (weaving speed of 0.1 lmZ).

[0100] (4) The plain weave fabric obtained in (3) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and in the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, and then washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. The elongation rate in the warp direction and the weft direction of the resulting fabric was measured by the above method. As a result, the stretch rate in the warp direction was 11% and the stretch rate in the weft direction was 21%, indicating high stretchability in the weft direction. In addition, this fabric was fluffy, excellent in texture, light and breathable. In addition, the weft strength of the weft yarn, which was not removed by the cotton fibers of the weft force forming the fabric, was also excellent.

[0101] Example 5

(1) The number of twists is 900 times Zm (Z twist) 100% cotton 60th yarn (Nisshinbo Co., Ltd., “Black Dragon 60 single yarn”) and 700 times of twist Zm (Z twist) Prepare 30th-yarn spun yarn of 100% cotton (manufactured by Tsuzuki Spinning Co., Ltd., “TS30 single yarn”), one of each of these spun yarns (total of 2) and the same as used in Example 1 Supply one polybulualcohol multifilament yarn to a double twister (Murata Kikai Co., Ltd. “36M”) and twist it so that the number of twists (upper twist) is 800 times Zm (S twist) A composite twisted yarn was produced together [the number of twists of the composite twisted yarn (upper twisted number) = 0.89 times the number of twists of the 60th spun yarn and 1.14 times the number of twists of the 30th spun yarn].

[0102] (2) A predetermined length (lm) of yarn is cut from the composite twisted yarn obtained in (1) above to obtain a sample yarn, the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn Separated into two types of yarn, the mass of each separated yarn was measured, and the result of measurement was determined. The ratio of each yarn in the composite twisted yarn was determined. The composite twisted yarn was 85% by weight spun yarn and water-soluble yarn. It consisted of 15% by mass.

[0103] (3) Cotton Weft No. 40 yarn was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft to weave a plain weave fabric of warp 25 Zcm, weft 20 Zcm ( 40% by mass of mixed twisted yarn in plain weave fabric). In this weaving process, plain weaving fabrics that could cause troubles such as thread breakage could be woven at high speed, and there was no problem in weaving mass production (weaving speed of 0.1 lmZ).

[0104] (4) The plain weave fabric obtained in (3) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:

15) Dissolve and remove the water-soluble yarn in the composite twisted yarn forming the fabric, and then wash with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then remove the fabric from the water. Dried at 150 ° C. The warp direction and weft stretch rate of the fabric thus obtained was measured by the method described above. The warp direction stretch rate was 12% and the weft direction stretch rate was 22%, and the stretch rate was high in the weft direction. Had sex. In addition, this fabric is fluffy, excellent in texture, and lightweight Excellent in breathability and breathability. In addition, it became a fabric that expressed twist irregularities due to the use of two spun yarns of different counts. In addition, the weft strength of the weft yarn was excellent because the cotton fibers were not removed from the weft yarn forming the fabric.

[0105] Comparative Example 1

(1) Twisting number 800 times Zm (Z-twisted) 100% cotton 40th-number spun yarn (manufactured by Tsuzuki Spinning Co., Ltd., “TS40 single yarn”) and the polybulu alcohol multi used in Example 1 One water-soluble yarn composed of filament yarn (56dtex) is supplied to a double twister (Murata Kikai Co., Ltd., “36 M”), and the twist number (upper twist) is 200 times Zm (S twist) ) To produce a composite twisted yarn [number of twists of composite twisted yarn (number of top twists) = 0.25 times the number of twisted spun yarns].

(2) A predetermined length (lm) of yarn is cut from the composite twisted yarn obtained in (1) above to obtain a sample yarn, and the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn are separated. It was separated into two types of yarn, and the mass of each separated yarn was measured, and the result of measurement was determined. When the ratio of each yarn in the composite twisted yarn was determined, the composite twisted yarn was 84% by weight spun yarn and 16% water-soluble yarn. It consisted of mass%.

[0107] (3) Cotton No. 40 twin yarn was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft to weave a plain weave fabric of warp 25 Zcm, weft 20 Zcm ( (Mixing ratio of compound twisted yarn in plain woven fabric: 40% by mass) (weaving speed: 0 lmZ).

[0108] (4) The plain weave fabric obtained in (3) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, and then washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. The stretch rate in the warp direction and the weft direction of the fabric thus obtained was measured by the method described above. The stretch rate in the warp direction was 11% and the stretch rate in the weft direction was 14%. Compared to -4, the elasticity was low.

[0109] Comparative Example 2

Two twists of 800m Zm (Z-twisted) 100% cotton 40th yarn (Tsetsu Spinning Co., Ltd., “TS4 0 single yarn”) and the polybulu alcohol multifilament yarn used in Example 1 (56dt ex) and one water-soluble yarn is supplied to a double twister (Murata Kikai Co., Ltd., “36M”), and the twist number (upper twist) is 2000 times Zm (S twist). Twist together to form a composite twist Although the yarn was manufactured [the number of twists of the composite twisted yarn (number of top twists) = 2.5 times the number of twisted yarns of the spun yarn], the twisted yarn was difficult due to many yarn breaks and the ability to produce composite twisted yarn I got it.

[0110] Comparative Example 3

(1) Ten times of 350m Zm (Z-twisted) 100% cotton, 10th spun yarn (manufactured by Tsuzuki Spinning Co., Ltd., “TS10 single yarn”) and the polybulu alcohol multi used in Example 1 One water-soluble yarn composed of filament yarn (56dtex) is supplied to a double twister (Murata Kikai Co., Ltd., “36 M”), and the twist number (upper twist) is 200 times Zm (S twist) ) To produce a composite twisted yarn [number of twists of composite twisted yarn (number of top twists) = 0.571 times the number of twisted spun yarns].

[0111] (2) A predetermined length (lm) of yarn is cut from the composite twisted yarn obtained in (1) above to obtain a sample yarn, and the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn are separated. Separated into two types of yarn, the mass of each separated yarn was measured, and the result of measurement was determined. When the ratio of each yarn in the composite twisted yarn was determined, this composite twisted yarn was 98.2% by weight spun yarn and water-soluble. Sex yarn 1. Consists of 8 mass%.

[0112] (3) A plain weave fabric of warp 25 Zcm and weft 5 Zcm was woven using cotton No. 40 twin yarn as warp and the composite twisted yarn obtained in (1) above as weft ( (Mixing ratio of composite twisted yarn in plain woven fabric 60% by mass) (weaving speed 0 lmZ min).

[0113] (4) The plain weave fabric obtained in (3) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and in the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, and then washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. The warp direction and weft direction elongation rate of the fabric thus obtained was measured by the method described above. The warp direction elongation rate was 11% and the weft direction elongation rate was 13%. Compared to -4, the elasticity was low.

[0114] Comparative Example 4

(1) The number of twists is 1500 times !! 1 twist) 100% cotton 120% spun yarn [Royal Textile Mills Ltd. (India), “Royal 120”] and 2 polybural alcohol used in Example 1 Three water-soluble yarns composed of multifilament yarn (56dtex) are supplied to a double twister (Murata Kikai Co., Ltd., “36M”), and the twist number (upper twist) is 1500 times Zm (S And twisted together to produce a composite twisted yarn [number of twists of composite twisted yarn (number of top twists) = spinning 1.0 times the number of yarn twists].

[0115] (2) A yarn of a predetermined length (lm) is cut from the composite twisted yarn obtained in (1) above to obtain a sample yarn, and the upper twist of the sample yarn is released, and the spun yarn and the water-soluble yarn It was separated into two types of yarns, the mass of each separated yarn was measured, and the result of measurement was determined. The ratio of each yarn in the composite twisted yarn was determined. The composite twisted yarn was 37% by weight spun yarn and water-soluble yarn. It was composed of 63% by mass.

[0116] (3) Cotton No. 40 twin yarn was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft to weave a plain weave fabric of warp 25 cm and weft 20 cm ( (Mixing ratio of composite twisted yarn in plain woven fabric 40% by mass) (weaving speed 0 lmZ min).

[0117] (4) The plain weave fabric obtained in (3) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and in the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, and then washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. The dough thus obtained was inferior in form stability and was less likely to cause squeezing and was less useful. Therefore, the stretch rate in the warp direction and the weft direction was not measured.

[0118] Reference Example 1

(1) Use one piece of cotton No. 40 double yarn as the warp, and use the composite twisted yarn obtained in (2) of Example 1 and cotton No. 30 double yarn as the weft in a ratio of 1: 4 A plain weave fabric of warp 25 Zcm, weft 20 Zcm was woven (mixing ratio of composite twisted yarn in plain weave fabric 8 mass%).

[0119] (2) The plain weave fabric obtained in (1) above is immersed in hot water at 90 ° C for 15 minutes (bath ratio = 1:15), and in the composite twisted yarn forming the fabric The water-soluble yarn was dissolved and removed, and then washed with hot water at 60 ° C for 10 minutes (bath ratio = 1:15), and then the fabric was taken out of the water and dried at 150 ° C. When the elongation rate in the warp direction and the weft direction of the fabric thus obtained was measured by the above method, the stretch rate in the warp direction was 11% and the stretch rate in the weft direction was 11%.

[0120] Example 6

In Example 4, a polybulualcohol multifilament yarn (56dtex, Kuraray Co., Ltd.) composed of an ethylene vinyl alcohol copolymer having a polymerization degree of 330 obtained by copolymerizing ethylene with 10 mol% of ethylene. The composite twisted yarn was prepared by the same method as in Example 4 except that the product was changed to “Mintbar”). A plain woven fabric was prepared in the same manner as in Example 4. Further, the polybulu alcohol-based multifilament yarn was dissolved and removed from the obtained plain weave fabric in the same manner as in Example 4 except that the dissolution condition was a condition of immersing in hot water at 90 ° C. for 10 minutes. The warp direction elongation rate and the weft direction elongation rate of the obtained fabric were 11% and 21%, respectively, which were the same as in Example 4 and had high stretchability in the weft direction. In addition, this fabric was soft and excellent in texture, lightweight and breathable. Furthermore, the weft strength of the weft yarn, which eliminates the fiber from the fiber, was also excellent. In this example, as compared with Example 4, water-soluble fibers can be dissolved and removed very quickly, and therefore, superior to Example 4 in terms of passability of the dissolution and removal process.

Claims

The scope of the claims

[1] A composite twisted yarn in which a plurality of spun yarns and a water-soluble yarn are twisted together, wherein (1) the twist directions of the plurality of spun yarns are the same direction, and (2) the twist direction of the composite twisted yarns is the spun yarn (3) Twist force of composite twisted yarn is 0.3 to 2 times the twisted number of the spun yarn, and (4) Total amount of plural spun yarns and water-soluble A composite twisted yarn in which the ratio (mass ratio) to the yarn is the total amount of a plurality of spun yarns Z water-soluble yarn = 98Z2 to 40Z60.

[2] The composite twisted yarn according to claim 1, wherein the number of twists of the spun yarn is 60 to 3000 times Zm.

[3] The composite twisted yarn according to claim 1, wherein the water-soluble yarn is a water-soluble filament yarn.

[4] The composite twisted yarn according to claim 1, wherein the water-soluble yarn is a filament yarn composed of water-soluble polybutyl alcohol fiber.

5. The composite twisted yarn according to claim 1, wherein the water-soluble yarn is a filament yarn composed of water-soluble ethylene-vinyl alcohol copolymer fiber.

6. The composite twisted yarn according to claim 1, wherein the spun yarn has a yarn count of 5 to 200 and the water-soluble yarn has a thickness of 15 to 2000 dtex.

[7] A method for producing a composite twisted yarn by twisting a plurality of spun yarns and a water-soluble yarn, wherein the plurality of spun yarns and the water-soluble yarn are aligned, and the number of twists of the composite twisted yarn is determined by the spun yarn. The method for producing a composite twisted yarn according to claim 1, wherein the spun yarn and the water-soluble yarn are twisted together so that the number of twists is 0.3 to 2 times.

[8] A method for producing a fabric, comprising dissolving at least a water-soluble yarn in a composite twisted yarn constituting the woven or knitted fabric in a hydrophilic solvent from the woven or knitted fabric formed of the composite twisted yarn according to claim 1.

[9] The method according to claim 8, wherein the woven or knitted fabric containing 10% by weight or more of the composite twisted yarn according to claim 1 is used as the woven or knitted fabric, and water is used as the hydrophilic solvent.

[10] A fabric obtained by the method according to claim 8.