JP4688654B2 - Compound twisted yarn - Google Patents

Description

  The present invention relates to a composite twisted yarn and a woven or knitted fabric produced using the composite twisted yarn. More specifically, the present invention relates to a composite twisted yarn obtained by twisting three types of yarn, a spun yarn, a filament yarn not having rubber elasticity, and a water-soluble yarn, and a woven / knitted fabric formed from the composite twisted yarn.

A composite yarn obtained by combining a spun yarn and a filament yarn has been widely used for woven and knitted fabrics. In the production of a composite yarn of spun yarn and filament yarn, a method by twisting and air processing is generally widely used for improving design effects and shape stability.
However, the fabric obtained by using a conventional composite yarn composed of spun yarn and filament yarn is hard, not fluffy, inferior in texture, and has poor stretchability.

Further, in woven and knitted fabrics using spun yarns, composite yarns combining spun yarns and polyurethane elastic yarns are widely used to impart stretchability to the woven or knitted fabrics. Typical examples of composite yarns using spun yarns and polyurethane elastic yarns include core spun yarns in which the core yarn made of polyurethane elastic yarn is covered with spinning cotton and twisted, and core yarns made of polyurethane elastic yarn. Examples thereof include a single covered yarn or a double covered yarn in which spun yarn is wound around a single layer or a plurality of layers, and a pliers in which two or more spun yarns and a polyurethane elastic yarn are twisted together (see Patent Document 1, etc.).
However, the above-mentioned conventional composite yarns using spun yarns and polyurethane elastic yarns use polyurethane elastic yarns with high stretchability, so the tension (tension) fluctuates greatly during weaving and weaving, and handling properties and weaving and weaving It is inferior in properties, requires special equipment and high technology when handling and knitting yarn, and the yarn strength is often insufficient. 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 from such yarns tend to lose their elasticity. Furthermore, the woven or knitted fabric produced using the polyurethane composite yarn often lacks flexibility, plump texture, lightness and the like.

In addition, the production of stretchable knitted and knitted fabrics using filament yarn has also been conventionally performed. As such conventional technology, false twisting is applied to filament yarns produced from thermoplastic polymers such as polyester and polyamide. A method for producing a stretchable woven or knitted fabric by producing a woven or knitted fabric from the yarn after applying the crimping, and then producing a crimped woven or knitted fabric by heat treatment, and a plurality of thermoplastic polymers having different heat shrinkage rates A side-by-side type composite filament yarn is manufactured using the above, a woven or knitted fabric is produced from the composite filament yarn, and then a heat treatment is performed to develop a coiled crimp to produce a stretchable woven or knitted fabric. .
However, in these conventional techniques, the polymer constituting the filament yarn is limited to a thermoplastic polymer such as polyester or polyamide. For example, for filament yarn that does not exhibit thermoplasticity such as rayon or acetate. It cannot be used, and it cannot be applied to natural fibers having a short fiber length such as cotton and wool.

  Furthermore, a method for producing a stretchable woolen knitted fabric without using a polyurethane elastic yarn has been proposed (see Patent Document 2). In this method, a woven or knitted fabric is formed from a mixed spun yarn composed of wool fibers and water-soluble polyvinyl alcohol fibers, the woven or knitted fabric is immersed in water, heated under stirring to shrink the water-soluble polyvinyl alcohol fibers, and then water-soluble. The stretchable woolen knitted fabric is manufactured by dissolving and removing the conductive polyvinyl alcohol fiber to obtain a woven or knitted fabric of only the woolen fiber, and then setting the woven or knitted fabric. However, the mixed spun yarn made of wool fibers and water-soluble polyvinyl alcohol fibers used in this method does not have sufficient yarn strength, and troubles such as yarn breakage occur when knitting and weaving using a high-speed loom or knitting machine. Is likely to occur. In addition, a stretchable woolen knitted fabric obtained by removing water-soluble polyvinyl alcohol fibers from a woven or knitted fabric formed from the mixed spun yarn is not yet sufficiently stretchable and lacks strength and the like. In addition, when this method is carried out using other fibers such as cotton and synthetic fibers instead of wool, it is difficult to obtain a stretchable knitted or knitted fabric.

JP 2001-131838 A JP-A-11-241269

An object of the present invention is not to use a polyurethane elastic yarn, and not only a filament yarn made of a thermoplastic polymer such as polyester or polyamide, but also a polymer not showing thermoplasticity such as rayon or acetate. It is also a composite yarn that effectively uses natural fibers with a short fiber length, such as cotton and wool, as raw material fibers, and is rich in elasticity, lightweight, flexible, An object of the present invention is to provide a composite yarn capable of producing a woven or knitted fabric excellent in texture and appearance.
Furthermore, the object of the present invention is excellent in yarn strength, excellent in knitting property without occurrence of trouble such as yarn breakage when using a high-speed loom or knitting machine, spun yarn made of natural fibers, Various kinds of spun yarns such as spun yarn made of synthetic fiber and spun yarn made of semi-synthetic fiber can be used, and it is possible to respond to small lots and many types with high productivity, and composite yarn of any thickness from fine count to thick count It is an object of the present invention to provide a composite yarn not using a polyurethane elastic yarn, which is useful for producing a stretchable woven or knitted fabric.
The object of the present invention is that there is no fluctuation in tension during weaving and weaving, etc., excellent handleability and weaving properties, no special weaving equipment and high technology are required, and there are no spots. An object of the present invention is to provide a composite yarn capable of easily and easily producing a woven or knitted fabric having a uniform finish and a good texture, texture, appearance, and the like, which is rich in elasticity.
Furthermore, an object of the present invention is a fiber from a spun yarn formed from the above-described composite yarn, having high stretchability, excellent in lightness, texture, flexibility, appearance, and the like, and constituting a woven or knitted fabric By providing a woven or knitted fabric without polyurethane elastic yarn that can be used effectively in various applications including ordinary clothing, which is excellent in strength and has no looseness of fibers, cutting of fibers, and closeness of yarn. is there.

The present inventors have intensively studied to achieve the above-described object. Then, by using three kinds of yarns, a spun yarn, a filament yarn having no rubber elasticity, and a water-soluble yarn, at a specific ratio, by twisting with a specific twist number in a twist direction opposite to the twist direction of the spun yarn. A composite twisted yarn was produced. As a result, it has been found that this composite twisted yarn has high yarn strength and does not use a polyurethane elastic yarn having rubber elasticity, so that it is excellent in handleability and knitting.
Furthermore, the present inventors have found that in this composite twisted yarn, the spun yarn is untwisted and lengthened by applying a twist in the direction opposite to the twisted direction of the spun yarn at the time of producing the composite twisted yarn, and the lengthened spun yarn is Since the twisted yarn is formed so as to cover the filament yarn and the water-soluble yarn, a woven or knitted fabric is produced using this composite twisted yarn, and the water-soluble yarn constituting the composite twisted yarn is dissolved in water from the woven or knitted fabric. As a result, a gap is formed where the water-soluble yarn is removed, and the restraint between the spun yarn and the filament yarn is broken down accordingly, and even though the polyurethane elastic yarn is not used, it expands and contracts. A woven or knitted fabric rich in nature can be obtained, and the woven or knitted fabric after the water-soluble yarn is dissolved and removed is plump, has a good feel and feel, and is excellent in lightness, breathability, appearance, etc. I found it.
Further, the inventors of the present invention have prepared a woven or knitted fabric from the composite twisted yarn by using a filament yarn having a crimp elongation of not less than a specific value as a filament yarn having no rubber elasticity in the production of the composite twisted yarn. It has been found that a woven or knitted fabric having higher stretchability can be obtained when water-soluble yarn is dissolved and removed from the woven or knitted fabric with water, and the present invention has been completed based on these various findings.

That is, the present invention
(1) A composite twisted yarn obtained by twisting a spun yarn, a filament yarn having no rubber elasticity and a water-soluble yarn, wherein the twist direction of the composite twist yarn is opposite to the twist direction of the spun yarn, and the twist number of the composite twist yarn is spun The number of twisted yarns is 0.3 to 2 times, and the proportion of spun yarn is in the range of 15 to 70 mass% based on the mass of the composite twisted yarn, and the proportion of filament yarn having no rubber elasticity is 10 to 60 mass. % And a water-soluble yarn ratio in the range of 5 to 75% by mass.

And this invention,
(2) (1) The filament yarn not having rubber elasticity having a value of crimp elongation (E) represented by the following formula (1) of 5% or more is used as the filament yarn not having rubber elasticity. This is a composite twisted yarn.

Crimp elongation (E) (%) = {(L ₂ −L ₁ ) / L ₂ } × 100 (1)

[In the formula, L ₁ is an 11110 decitex casket (total length of 50 cm) using a filament thread that does not have rubber elasticity under a tension of 0.044 cN. In this state, apply an initial load of 10 g to the lower end of the casket and leave it in the air (25 ° C., 65% RH) for 5 minutes, then immerse it in a constant temperature water bath at 90 ° C. for 30 minutes with the metal rod passed horizontally. Heat, then remove from the thermostatic water bath and remove only the 10g load, absorb the water adhering to the yarn with paper, dry for 4 hours at room temperature (25 ° C), and then apply 10g load again to the bottom of the casket The total length (cm) of the case when left for 5 minutes at medium (25 ° C., 65% RH) is shown. In addition, L ₂ is the amount of the case when the load of 10 g is removed from the case after the measurement of L ₁ and the load of 1000 g is applied to the lower end of the case and left in the air (25 ° C., 65% RH) for 5 minutes. Total length (cm) is shown. ]

Furthermore, the present invention provides
(3) A woven or knitted fabric produced using the composite twisted yarn of (1) or (2) ; ( 4 ) a woven or knitted fabric produced using the composite twisted yarn of (1) or (2); A woven or knitted fabric obtained by dissolving and removing water-soluble yarn in the composite twisted yarn with water; and
( 5 ) The woven or knitted fabric according to ( 4 ), wherein the water-soluble yarn in the composite twisted yarn is dissolved and removed from the woven or knitted fabric containing the composite twisted yarn of (1) or (2) at a ratio of 10% by mass or more;
It is.

The composite twisted yarn of the present invention has high yarn strength and is excellent in handleability and knitting property because it does not use a polyurethane elastic yarn having rubber elasticity.
In the composite twisted yarn of the present invention, the spun yarn is untwisted and lengthened by twisting in the direction opposite to the twisted direction of the spun yarn at the time of producing the composite twisted yarn, and the elongated spun yarn becomes the filament yarn and the water-soluble yarn. Twisting yarn is carried out in the form of covering. Therefore, when producing a woven or knitted fabric using the composite twisted yarn of the present invention and dissolving and removing the water-soluble yarn constituting the composite twisted yarn from the woven or knitted fabric in water, a gap is generated where the water-soluble yarn is removed, Accordingly, the restraint between the spun yarn and the filament yarn is resolved several times, and a woven or knitted fabric having high stretchability can be obtained even though the polyurethane elastic yarn is not used. In addition, the knitted or knitted fabric obtained by dissolving and removing the water-soluble yarn obtained thereby is plump, has a good feel and feel, and is excellent in lightness, breathability and appearance.

In the composite twisted yarn of the present invention, when a filament yarn having no rubber elasticity and having a crimp elongation (E) of 5% or more is used, it is higher when the water-soluble yarn is dissolved and removed with water. A woven or knitted fabric exhibiting elasticity is obtained.
In the composite twisted yarn of the present invention, it is not necessary to select the raw cotton constituting the spun yarn, and the spun yarn composed of natural fibers such as cotton, hemp, silk, and wool, the spun yarn composed of synthetic fibers, and the spun yarn composed of semi-synthetic fibers. , Various spun yarns such as blended spun yarns of natural fibers and synthetic fibers can be used, and can be obtained in desired thicknesses from fine counts to thick counts, and also synthetic fibers as filament yarns that do not have rubber elasticity, Any of natural fibers such as semi-synthetic fibers and silk can be used, and various composite twisted yarns can be produced according to the kind of spun yarn and filament yarn used.
The composite twisted yarn 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 above-described excellent properties.

The present invention is described in detail below.
The composite twisted yarn of the present invention needs to be formed from three types of yarns: spun yarn, filament yarn not having rubber elasticity, and water-soluble yarn.
The spun yarn constituting the composite twisted yarn of the present invention may be any spun yarn formed from fibers that do not dissolve in water (hot water, hot water, cold water). For example, natural yarn such as cotton, hemp, silk, wool, etc. Fibers, polyester fibers, polyamide fibers, polypropylene fibers, acrylic fibers, water (hot water) insoluble polyvinyl alcohol fibers, synthetic fibers such as polyvinylidene chloride fibers, semi-synthetic fibers such as acetate, recycled fibers such as rayon and cupra Either a single spun yarn comprising one type of fiber selected from the above, or a mixed spun yarn comprising two or more types of the above-described fibers may be used. An appropriate spun yarn may be selected and used according to the use of the composite twisted yarn and the woven or knitted fabric produced using the same.

The spun yarn may be any of a single yarn, a double yarn or three or more twisted yarns.
Here, the “twisted number of spun yarn” as used in the present invention refers to the number of twisted yarns applied last in the production of spun yarn. For example, when the spun yarn is a single yarn, it refers to the number of twists applied at the time of spinning to produce a single yarn, and in the case of a double yarn, when two yarns are twisted together to produce a double yarn This refers to the number of twists. In the case of three or more twisted yarns, the number of twists when three or more yarns are twisted together to produce a twisted yarn.
The number of twists of the spun yarn is not particularly limited. If the number of twists of the spun yarn is T (unit: times / 2.54 cm) and the cotton count is S (unit: count), K = T / √S. A spun yarn having a twist coefficient K of 2 to 4 is preferably used from the viewpoints of the quality stability of the spun yarn, the handleability and productivity at the time of producing the composite twisted yarn, and the availability of the spun yarn.

When the spun yarn is a twin yarn or three or more twisted yarns, the final twist direction when the spun yarns are produced is the same as the single yarn twist direction used for the production of the double yarn or the twisted yarn. The reverse twist and the number of twists of the last 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) The number of twists of the single yarn used is preferably 0.3 to 0.9 times from the viewpoints of productivity at the time of producing the composite twisted yarn, handling properties, texture, availability of spun yarn, and the like.
Further, as the yarn count of the spun yarn, those having a cotton count of 5 to 140 are preferable from the viewpoints of processability, productivity, availability of spun yarn, market demand, etc. when producing a composite twisted yarn. Used.

In the present invention, the filament yarn that constitutes the composite fiber needs to be a filament yarn that does not have rubber elasticity (a yarn made of long fibers that do not have rubber elasticity).
The filament yarn having no rubber elasticity (hereinafter referred to as “non-rubber elastic filament yarn”) constituting the composite twisted yarn of the present invention is a filament (long fiber) that does not dissolve in water (hot water) and does not have rubber elasticity. Any synthetic yarn filament such as polyester filament, polyamide filament, polypropylene filament, acrylic filament, water (hot water) insoluble polyvinyl alcohol filament, polyvinylidene chloride filament, semi-synthetic such as acetate, etc. It should just consist of 1 type, or 2 or more types of filaments (long fiber) chosen from fiber filaments, regenerated fiber filaments, such as rayon and cupra, and natural fiber filaments, such as silk. The non-rubber elastic filament yarn may be a single filament yarn composed of one type of filament, or a mixed filament yarn composed of two or more types of the above-mentioned filaments. An appropriate non-rubber elastic filament yarn may be selected and used in accordance with the use of the composite twisted yarn and the use of the woven or knitted fabric produced using the composite twisted yarn.

The non-rubber elastic filament yarn may be crimped or non-crimped. Among them, it is possible to use non-rubber elastic filament yarn that has already been crimped or latent crimpable non-rubber elastic filament yarn, and treat the woven or knitted fabric obtained by knitting and weaving composite twisted yarn with hot water or the like. Thus, when the water-soluble yarn in the knitted or knitted fabric is dissolved and removed, the non-rubber elastic filament yarn in the composite twisted yarn is crimped, and this is preferable because a high stretchability is imparted to the woven or knitted fabric.
At that time, as the non-rubber elastic filament yarn that has already been crimped, any conventionally known crimped non-rubber elastic filament yarn can be used. Examples thereof include a non-rubber elastic filament yarn crimped by a method of embossing through a heated gear.
In addition, as the latent crimpable non-rubber elastic filament yarn, any conventionally known non-rubber elastic filament yarn that develops crimp by heating can be used, and representative examples include two or more types of different melting points. Examples thereof include a composite fiber in which a thermoplastic polymer is combined in a side-by-side manner, and a fiber in which spots are generated on the cross section of the fiber by selecting spinning conditions.
In particular, at the stage of yarn (composite twisted yarn) before knitting or weaving, the degree is small even if not crimped or crimped, and a woven or knitted fabric is produced from the composite twisted yarn, and the woven or knitted fabric is heated with hot water. It is preferable to use a latently crimped non-rubber elastic filament yarn that develops crimps, particularly by dissolving and removing the water-soluble yarn in the composite twisted yarn that has been treated to form a woven or knitted fabric, thereby producing a composite twisted yarn Therefore, the handleability and processability during twisting are improved.

In particular, in the composite twisted yarn of the present invention, when a non-rubber elastic filament yarn having a crimp elongation (E) represented by the following formula (1) of 5% or more is used as the non-rubber elastic filament yarn, When a woven or knitted fabric is prepared from the composite twisted yarn and the water-soluble yarn in the composite twisted yarn is dissolved and removed with water, a woven or knitted fabric having a higher stretchability can be obtained, which is preferable.

Crimp elongation (E) (%) = {(L ₂ −L ₁ ) / L ₂ } × 100 (1)

[In the formula, L ₁ is an 11110 decitex casket (total length of 50 cm) using a filament thread that does not have rubber elasticity under a tension of 0.044 cN. In this state, apply an initial load of 10 g to the lower end of the casket and leave it in the air (25 ° C., 65% RH) for 5 minutes, then immerse it in a constant temperature water bath at 90 ° C. for 30 minutes with the metal rod passed horizontally. Heat, then remove from the thermostatic water bath and remove only the 10g load, absorb the water adhering to the yarn with paper, dry for 4 hours at room temperature (25 ° C), and then apply 10g load again to the bottom of the casket The total length (cm) of the case when left for 5 minutes at medium (25 ° C., 65% RH) is shown. In addition, L ₂ is the amount of the case when the load of 10 g is removed from the case after the measurement of L ₁ and the load of 1000 g is applied to the lower end of the case and left in the air (25 ° C., 65% RH) for 5 minutes. Total length (cm) is shown. ]

  In the conjugate fiber of the present invention, a crimped stretch represented by the above formula (1) is obtained as a non-rubber elastic filament yarn from the viewpoint of obtaining a more stretchable woven or knitted fabric after dissolving and removing the water-soluble yarn with water. More preferably, the rate (E) is 10% or more, and more preferably 20% or more. The upper limit value of the crimp elongation (E) is not particularly limited, but if the crimp elongation (E) is too high, the processability of the twisted yarn is reduced, and if it is to be compensated, a feeding device is required. Therefore, generally, the crimp elongation (E) is preferably 80% or less, and more preferably 50% or less.

The total thickness (total fineness) of the non-rubber elastic filament yarn is not particularly limited, but it is easy to combine with the spun yarn and the water-soluble yarn, the handling property of the composite twisted yarn, the strength of the composite twisted yarn, and the composite twisted yarn. In general, the total fineness of the non-rubber elastic filament yarn is preferably 30 to 600 dtex, more preferably 56 to 330 dtex, from the viewpoint of the quality of the woven or knitted fabric to be produced.
The thickness (single fiber fineness) of each filament constituting the non-rubber elastic filament yarn is not particularly limited, but the handleability of the composite twisted yarn at the time of weaving and the like, the strength of the composite twisted yarn, the woven or knitted fabric obtained using the composite twisted yarn From the viewpoint of quality and the like, the single fiber fineness of each filament constituting the non-rubber elastic filament yarn is preferably 0.3 to 11 dtex, and more preferably 0.5 to 3.3 dtex. When the single fiber fineness of each filament constituting the non-rubber elastic filament yarn is small, it is generally possible to obtain a woven or knitted fabric having flexibility and a fine texture, whereas when the single fiber fineness of each filament is large, A knitted or knitted fabric having a tight feeling and a dry feeling can be obtained.

  The non-rubber elastic filament yarn may be a non-rubber elastic monofilament yarn composed of one non-rubber elastic filament, or may be a non-rubber elastic multifilament yarn composed of a plurality of non-rubber elastic filaments. Among them, in terms of quality of knitted fabric obtained by using the composite twisted yarn of the present invention, handling property at the time of knitting, etc., strength of composite twisted yarn, processability of twisted yarn, easy availability, non-rubber elasticity The filament yarn is preferably a non-rubber elastic multifilament yarn in which 1 to 300 filaments, particularly 6 to 150 filaments are assembled.

  As the water-soluble yarn constituting the composite twisted yarn of the present invention, a yarn that dissolves in water (hot water) at a temperature up to the boiling temperature of water (about 100 ° C.) under atmospheric pressure is produced from the composite twisted yarn of the present invention. It is preferably used from the viewpoint of ease of removal and handling when the water-soluble yarn is dissolved and removed from the woven or knitted fabric with water. In particular, as the water-soluble yarn, when the water-soluble yarn itself is immersed in hot water at a temperature of 80 ° C. or more and left for 30 minutes, it is 85% by mass or more based on the mass of the water-soluble yarn before immersion, In particular, a water-soluble yarn in which 95% by mass or more dissolves 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 more preferably used. If water solubility of the water-soluble yarn is low, when the woven or knitted fabric produced using the composite twisted yarn is treated with water to dissolve and remove the water-soluble yarn in the composite twisted yarn, the removal of the water-soluble yarn becomes insufficient, It becomes difficult to impart sufficient stretchability, lightness, breathability and the like to the woven or knitted fabric.

  Any fiber can be used as the fiber constituting the water-soluble yarn as long as it is a fiber that imparts water solubility to the water-soluble yarn. For example, water-soluble polyvinyl alcohol fiber, water-soluble ethylene-vinyl alcohol copolymer fiber And water-soluble polyamide fibers. Among them, water-soluble polyvinyl alcohol fibers and water-soluble ethylene-vinyl alcohol copolymer fibers are preferably used in terms of fiber strength, high solubility in water (hot water), biodegradability, availability, and the like. It is done. Water-soluble polyvinyl alcohol fibers have been widely known, and are sold as, for example, water-soluble vinylon.

The water-soluble yarn may be either a spun yarn or a filament yarn as long as it is water-soluble. When producing a composite twisted yarn having a low water-soluble yarn blend ratio, it is preferable to use a filament yarn, whereby when the woven or knitted fabric produced from the composite twisted yarn is treated with water to dissolve and remove the water-soluble yarn in the composite twisted yarn. In addition, the removal of the water-soluble yarn is performed quickly and satisfactorily.
The thickness (total fiber fineness) of the water-soluble yarn is 15 to 200 dtex, particularly 25 to 100 dtex, which facilitates twisting of the spun yarn and the non-rubber elastic filament yarn, the strength of the composite twisted yarn, and spinning. It is preferable from the viewpoints of reducing fluff, ease of dissolving and removing water-soluble yarn from a woven or knitted fabric formed from composite twisted yarn, imparting stretchability to the fabric after dissolving the water-soluble yarn, and availability.

  In the present invention, in order to obtain the composite twisted yarn of the present invention, the reason why the yarn (water-soluble yarn) that dissolves in water instead of the yarn that dissolves in alkali or acid is used is the composite twisted yarn forming a woven or knitted fabric When a part of the yarn is removed with alkali or acid, the spun yarn and filament yarn constituting the composite twisted yarn may be altered or decomposed, whereas when treated with water, the spun yarn and It is mentioned that there is no fear of degeneration or decomposition of the filament yarn. In addition, when a water-soluble yarn using water-soluble polyvinyl alcohol fiber or water-soluble ethylene-vinyl alcohol copolymer fiber is used, water-soluble polyvinyl alcohol or water-soluble ethylene-vinyl alcohol copolymer is used. The fiber is biodegradable, and the reason is that the waste liquid after dissolution can be decomposed and removed by microorganisms.

  In the composite twisted yarn of the present invention, based on the mass of the composite twisted yarn, the proportion of spun yarn is 15 to 70 mass%, the proportion of non-rubber elastic filament yarn is 10 to 60 mass%, and the proportion of water-soluble yarn is 5 to 75 mass%. %. When the ratio of the three types of yarns constituting the composite twisted yarn is in the above range, a composite twisted yarn having excellent yarn strength and excellent handleability during weaving can be obtained, and the weaving produced by weaving and weaving the composite twisted yarn When water-soluble yarns are dissolved and removed from the knitted fabric, no knitting or the like occurs, the woven fabric has excellent shape stability, and has excellent stretchability, plumpness, texture, lightness, breathability, appearance, etc. Can be obtained.

In the composite twisted yarn, if the proportion of the water-soluble yarn becomes too large and the proportion of the spun yarn and the non-rubber elastic filament yarn becomes too small, a woven or knitted fabric is produced from the composite twisted yarn, and the water-soluble yarn is washed from the woven or knitted fabric with water. When it is dissolved and removed, the dough becomes unstable, and the fabric tends to become loose.
In addition, in the composite twisted yarn, if the proportion of the water-soluble yarn is too small, a fabric knitted fabric is produced from the composite twisted yarn, and the water-soluble yarn is dissolved and removed from the woven or knitted fabric with water. In other words, it tends to be low in lightness and air permeability.
Furthermore, even if the proportion of the water-soluble yarn in the composite twisted yarn is in an appropriate range, if the proportion of the spun yarn is too large, while the proportion of the non-rubber elastic filament yarn is too small, the yarn strength of the composite twisted yarn is reduced. In addition, it is easy for spun yarn to fall out.
Even if the proportion of the water-soluble yarn in the composite twisted yarn is in an appropriate range, if the proportion of the non-rubber elastic filament yarn is too large, while the proportion of the spun yarn is too small, the water-soluble yarn is dissolved and removed. The texture of the resulting fabric tends to be inferior.

  As the number of spun yarns, non-rubber elastic filament yarns and water-soluble yarns constituting the composite twisted yarn (number of yarns), 1 to 3 spun yarns, non-rubber from the viewpoint of limiting the number of krills and quality control of the twisting machine It is preferable that there are 1-3 elastic filament yarns and 1-3 water-soluble yarns, 1-2 spun yarns, 1-2 non-rubber elastic filament yarns, 1-2 water-soluble yarns. More preferably, one spun yarn, one non-rubber elastic filament yarn and one water-soluble yarn are twisted together to form a composite twisted yarn.

  In the composite twisted yarn of the present invention, the twist direction of the composite twisted yarn (twisted direction when three types of spun yarn, non-rubber elastic filament yarn and water-soluble yarn are twisted together) (hereinafter, the twist of the composite twisted yarn is referred to as “upper twist”. However, the twist direction of the spun yarn constituting the composite twisted yarn (hereinafter, the twist of the spun yarn may be referred to as “bottom twist”) is required to be reversed. Reversing the twist direction of the upper twist and the twist direction of the lower twist is generally performed in terms of reducing the twisting torque and improving the feel of the twist, but the twisting direction of the upper twist is lower. When the upper twist is performed to produce a composite twisted yarn, the upper twist works in the direction of slightly untwisting the spun yarn (the lower twist). Twisting is performed in a state where the yarn length of the spun yarn is somewhat longer due to twisting, and the spun yarn with the longer yarn length covers the non-rubber elastic filament yarn or the water-soluble yarn.

In the composite twisted yarn of the present invention, it is necessary that the number of twists of the composite twisted yarn (number of upper twists) be 0.3 to 2 times the number of twisted yarns (twisted number of lower twist), and 0.4 to The ratio is preferably 1.8 times, and more preferably 0.5 to 1.75 times.
If the number of twists of the upper twist is less than 0.3 times the number of twists of the lower twist, the stability of the twist will be poor, and the resulting composite twisted yarn will be uneven, causing variations in strength, etc., insufficient suppression of fluff, spinning The weaving property tends to be inferior due to insufficient covering of non-rubber elastic filament yarn and water-soluble yarn with yarn, and the twist of the spun yarn (under twist) is not untwisted during the twisting process for producing the composite twisted yarn. Along with this, the stretchability, plumpness, texture, lightness, etc. of the fabric obtained by preparing a woven or knitted fabric and dissolving the water-soluble yarn are liable to be lowered.
On the other hand, if the number of twists of the upper twist exceeds twice that of the lower twist, troubles such as yarn breakage may occur in the twisting process when producing the composite twisted yarn, and the composite twisted yarn may not be obtained, Decrease, strength reduction of the resulting composite twisted yarn, process failure during weaving and knitting using composite twisted yarn, torque of composite twisted yarn due to twisting becomes too strong, process failure during weaving and knitting associated with it This is likely to cause a decrease in productivity.
The “twist number of the composite twisted yarn” (the twist number of the upper twist) as used in the present specification means a twisting step in producing a composite twisted yarn by twisting spun yarn, non-rubber elastic filament yarn and water-soluble yarn. The set twist number.

  In the production of the composite twisted yarn of the present invention, as a non-rubber elastic filament yarn, when using a filament yarn that has already developed crimp, a spun yarn in a state where the filament yarn is tensioned and the crimp is extended, It is preferable to twist the non-rubber elastic filament yarn and the water-soluble yarn from the viewpoint of obtaining a woven or knitted fabric excellent in stretchability when the water-soluble yarn is dissolved and removed from the woven or knitted fabric made from the composite twisted yarn.

  There are no particular restrictions on the type of twisting machine for twisting together three types of yarns: spun yarn, non-rubber elastic filament yarn and filament yarn. For example, a conventional general-purpose twisting machine such as a double twister, ring twister or up twister is used. can do.

  The composite twisted yarn of the present invention obtained as described above generally has torque. Even if it has torque, if it does not interfere with the weaving and weaving process, it can be used as it is for the production of woven or knitted fabric without reducing the torque. On the other hand, when 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 must be determined depending on the spun yarn constituting the composite twisted yarn, the non-rubber elastic filament yarn, the type of water-soluble yarn, the strength of the torque of the composite twisted yarn, and the like.

  The composite twisted yarn of the present invention obtained as described above is in a state in which the spun yarn that has been untwisted and elongated is arranged outside the composite twisted yarn and is also restrained by the non-rubber elastic filament yarn and the water-soluble yarn. Because it can be handled by a loom or knitting machine, it is excellent in knitting and weaving. In addition, the knitted or knitted fabric produced from the composite twisted yarn of the present invention has a good feeling and bulge because the spun yarn is arranged on the outer side, and the non-rubber elastic filament yarn having a higher degree of freedom is provided on the inner side. Therefore, it becomes a woven or knitted fabric excellent in stretchability.

There are no particular restrictions on the type of woven or knitted fabric produced using the composite twisted yarn of the present invention, the content of the structure, and the like.
In the production of the woven or knitted fabric, the use ratio of the composite twisted yarn of the present invention can be adjusted according to the type and use of the woven or knitted fabric, the degree of expansion and contraction required for the woven or knitted fabric, and the like. In order to obtain a woven or knitted fabric having high elasticity, in the woven or knitted fabric before the treatment of removing the water-soluble yarn in the composite twisted yarn forming the woven or knitted fabric in water, the composite twisted yarn of the present invention is used. It is preferable that the use ratio is 10% by mass or more, particularly 25% by mass or more with respect to the mass of the woven or knitted fabric, whereby the woven or knitted fabric is treated with water (hot water) to form a woven or knitted fabric. After dissolving and removing the water-soluble yarn in the twisted yarn, a woven or knitted fabric having high stretchability can be obtained.

The treatment of dissolving and removing the water-soluble yarn in the composite twisted yarn with water from the woven or knitted fabric produced using the composite twisted yarn of the present invention is performed before the step of dyeing the woven or knitted fabric and before the step of attaching the resin to the woven or knitted fabric. It is good to do. When water-soluble treatment of the water-soluble yarn constituting the composite twisted yarn is performed during or after the dyeing process or resin adhering process, the water-soluble yarn does not interfere with the dyeing process or resin adhering process. Is not sufficiently removed. The treatment for dissolving and removing the water-soluble yarn in the composite twisted yarn forming the woven or knitted fabric with water is usually preferable in the first stage from the viewpoint of the smoothness of the subsequent production process and the quality of the woven or knitted fabric.
The temperature of the water when dissolving and removing the water-soluble yarn in the composite twisted yarn forming the woven or knitted fabric with water is the type of water-soluble fiber constituting the water-soluble yarn, the solubility in water, the shape and thickness of the yarn, etc. When the water-soluble yarn is formed from water-soluble polyvinyl alcohol fiber, the treatment with warm water or hot water at a temperature of 70 to 100 ° C. is usually performed for a short time. Can be quickly dissolved and removed from the woven or knitted fabric.

Hereinafter, the present invention will be specifically described with reference to examples and the like, but the present invention is not limited to the following examples.
In the following examples and comparative examples, the crimp elongation (E) of the polyester multifilament yarn (non-rubber elastic filament yarn) used for the production of the composite twisted yarn was determined by the above mathematical formula (1).
Moreover, the elongation rate of the woven fabric (plain woven fabric) produced using the composite twisted yarn (fabric after the water-soluble yarn was dissolved and removed with water) was measured as follows.

[Elongation rate of plain weave fabric]
(1) A test piece (a) having a warp dimension of 15 cm (length) and a weft dimension of 2.5 cm (width) from a plain weave fabric manufactured in the following example, and the warp direction of the fabric The test piece (b) having a dimension of 2.5 cm (width) and a dimension in the weft direction of 15 cm (length) was cut off.
(2) A 1 g weight is attached to the center (the center in the width direction) of one end portion in the length direction of the test piece (a) cut out in the above (1), and the end portion to which the weight is attached is directed downward. The test piece was hung vertically and left in that state for 1 minute, and the length (La ₁ ) of the test piece (a) at that time was measured.
Next, the 1 g weight is removed from the end of the test piece (a). Instead, a 300 g weight is attached to the same place and hung vertically and left in that state for 3 minutes. The length (La ₂ ) (cm) was measured, and the elongation (%) in the warp direction of the plain weave fabric was determined from the following mathematical formula (2a).

Elongation rate in warp direction (%) = {(La ₂ −La ₁ ) / La ₁ } × 100 (2a)

(3) A 1 g weight is attached to the center (one center in the width direction) of one end portion in the length direction of the test piece (b) cut out in the above (1), and the end portion with the weight is turned down. The test piece was suspended vertically and left in that state for 1 minute, and the length (Lb ₁ ) of the test piece (b) at that time was measured.
Next, the 1 g 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. At that time, the test piece (b) The length (Lb ₂ ) (cm) was measured, and the elongation (%) in the weft direction of the plain weave fabric was determined from the following mathematical formula (2b).

Elongation rate in the weft direction (%) = {(Lb ₂ −Lb ₁ ) / Lb ₁ } × 100 (2b)

  In the following examples and comparative examples, the types and contents of spun yarns, polyester multifilament yarns (non-rubber elastic filament yarns) and water-soluble yarns used for the production of the composite twisted yarn are as follows.

《Spun yarn》
(1) Spinned yarn (I) :
Number of twists = 600 times / m (Z twist) (single yarn) (20th yarn of 100% cotton) (“TS20 single yarn” manufactured by Tsuzuki Spinning Co., Ltd.) [Number of twists per 2.54 cm T = 15.24 times Thus, the count S = 20, and the twist coefficient K = 15.24 / √20 = 15.24 / 4.47 = 3.24 determined from the formula: K = (T / √S)]
(2) Spinned yarn (II ):
Twist number = 600 times / m (S twist) (double yarn) [twist number = 800 times / m (Z twist) 100% cotton 40% spun yarn (“TS40 single yarn” manufactured by Tsuzuki Spinning Co., Ltd.) Twist yarn obtained by twisting the yarn to S600 times / m]
(3) Spun yarn (III) :
Number of twists = 700 times / m (Z twist) (single yarn) (30th spun yarn of 100% cotton) (“TS30 single yarn” manufactured by Tsuzuki Spinning Co., Ltd.)
(4 ) Spinned yarn (IV ):
Twist number = 300 times / m (S twist) (double yarn) [twist number = 450 times / m (Z twist) 100% cotton 14th yarn (TS14 single yarn manufactured by Tsuzuki Spinning Co., Ltd.) Twist yarn obtained by twisting the yarn so as to be S300 times / m]
(5) Spun yarn (V) :
Number of twists = 1500 times / m (Z twist) (single yarn) (120th spun yarn of 100% cotton) (“Sikibo 120 single yarn” manufactured by Shikibo)

《Non-rubber elastic filament yarn (polyester multifilament yarn)》
(1) Polyester multifilament yarn (A) :
“Clavera” manufactured by Kuraray Co., Ltd. (84 dtex / 36 filament, crimp elongation (E) = 25%)
(2) Polyester multifilament yarn (B) :
Kuraray Co., Ltd. “Clavera” (84 dtex / 36 filament, crimp elongation (E) = 5%)
(3) Polyester multifilament yarn (C) :
“Clavera” manufactured by Kuraray Co., Ltd. (167 dtex / 48 filament, crimp elongation (E) = 21%)
(4) Polyester multifilament yarn (D) :
“Kurabella” manufactured by Kuraray Co., Ltd. (333 dtex / 96 filament, crimp elongation (E) = 22%)
(5) Polyester multifilament yarn (E) :
“Clavera” manufactured by Kuraray Co., Ltd. (33 dtex / 6 filament, crimp elongation (E) = 6%)
(6) Polyester multifilament yarn (F) :
Kuraray Co., Ltd. “Clavera” (33 dtex / 12 filament, crimp elongation (E) = 4%)

《Water-soluble yarn》
Water-soluble yarn (a) :
Polyvinyl alcohol multifilament yarn (PVA multifilament yarn) (56 dtex / 12 filament) (“Water-soluble vinylon” manufactured by Kuraray Co., Ltd.) (completely dissolved in hot water at 80 ° C.)

Example 1
(1) One spun yarn (I), one polyester multifilament yarn (A), and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting so that the number of twists in the composite twisted yarn was 300 times / m (S twist) (by applying an upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 68/19/13 (mass ratio).
(3) Cotton No. 30 double yarn (Tsutsubo Co., Ltd. “TS30 single yarn” double yarn) is used as the warp, and the composite twisted yarn obtained in (1) above is used as the weft, warp 23 / cm, A plain weave fabric with a weft of 18 / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) above is immersed in hot water at 80 ° C. for 15 minutes (bath ratio = 1: 10), and the water-soluble yarn in the composite twisted yarn forming the fabric is obtained. After dissolving and removing, the dough was removed from the water and dried at 120 ° C. The stretch rate in the weft direction of the fabric thus obtained was measured by the above-mentioned method, which was 23%, had high stretchability, and was made plump by dissolving and removing the water-soluble yarn with water. Since it occupies the surface of the fabric, the cotton texture was good.

Example 2
(1) One spun yarn (I), one polyester multifilament yarn (A), and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting the composite twisted yarn so that the number of twists was 1000 times / m (S twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 68/19/13 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 18 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the dough thus obtained was measured by the above-mentioned method, which was 26%, had high stretchability, and was made plump by dissolving and removing the water-soluble yarn with water. Since it occupies the surface of the fabric, the cotton texture was good.

Example 3
(1) One spun yarn (I), one polyester multifilament yarn (B), and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting the composite twisted yarn so that the number of twists was 1000 times / m (S twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 68/19/13 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 18 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the fabric thus obtained was 19% as measured by the method described above, had high stretchability, and was made plump by dissolving and removing the water-soluble yarn with water. Since it occupies the surface of the fabric, the cotton texture was good.

Example 4
(1) One spun yarn (II), one polyester multifilament yarn (A) and one water-soluble yarn (PVA multifilament yarn) are used with a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was produced by twisting the composite twisted yarn so that the number of twists was 1000 times / m (Z twist) (by applying an upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 68/19/13 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 18 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the fabric thus obtained was measured by the method described above, and it was 25%, which had high stretchability, and was made plump by dissolving and removing the water-soluble yarn with water. Since it occupies the surface of the fabric, the cotton texture was good.

Example 5
(1) One spun yarn (III), one polyester multifilament yarn (C), and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting the composite twisted yarn so that the number of twists was 1000 times / m (S twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 47/40/13 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 18 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the dough thus obtained was measured by the above-mentioned method, which was 26%, had high stretchability, and was made plump by dissolving and removing the water-soluble yarn with water. Since it occupies the surface of the fabric, the cotton texture was good.

Example 6
(1) One spun yarn (III), one polyester multifilament yarn (D) and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting the composite twisted yarn so that the number of twists was 1000 times / m (S twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 34/57/9 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 14 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the fabric thus obtained was measured by the method described above, and it was 20%. It has high stretchability, and it was made plump by dissolving and removing water-soluble yarn with water. The texture was somewhat strong.

<< Comparative Example 1 >>
(1) One spun yarn (I), one polyester multifilament yarn (A), and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting the composite twisted yarn so that the number of twists was 150 times / m (S twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 68/19/13 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 18 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the fabric thus obtained was measured by the method described above, and it was 13%. The stretchability was low, and the spun yarn did not occupy the surface of the fabric. Was low.

<< Comparative Example 2 >>
A single twisted yarn (I), a polyester multifilament yarn (A) and a water-soluble yarn (PVA multifilament yarn) are used in a double twisted yarn ("36M" manufactured by Murata Machinery Co., Ltd.) An attempt was made to produce a composite twisted yarn by twisting it so that the number of twists was 1800 times / m (S twist), but there were many yarn breaks and twisting was difficult.

<< Comparative Example 3 >>
(1) One spun yarn (IV), one polyester multifilament yarn (D) and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was produced by twisting the composite twisted yarn so that the number of twists was 400 times / m (Z twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 69/27/4 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 11 A plain weave fabric of 1 book / cm was woven (50% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The stretch rate in the weft direction of the fabric thus obtained was measured by the method described above and found to be 13%, indicating low stretchability and low plumpness.

<< Comparative Example 4 >>
(1) One spun yarn (V), one polyester multifilament yarn (E) and seven water-soluble yarns (PVA multifilament yarn) were used using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was produced by twisting the composite twisted yarn so that the number of twists was 2000 times / m (S twist) (by applying the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the characteristic yarn was 10/7/83 (mass ratio).
(3) The same number 30 cotton yarn as used in (3) of Example 1 was used as the warp, and the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 17 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The fabric obtained in this way was easily slipped, had no form stability, and had no commercial value.

<< Comparative Example 5 >>
(1) One spun yarn (I), one polyester multifilament yarn (F) and one water-soluble yarn (PVA multifilament yarn), using a double twister ("36M" manufactured by Murata Machinery Co., Ltd.) The composite twisted yarn was manufactured by twisting it so that the number of twists in the composite twisted yarn was 800 times / m (S twist) (over the upper twist).
(2) A yarn of a predetermined length (1 m) 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, the polyester multifilament yarn and the water-soluble yarn The yarn was separated into three types of yarns, the mass of each separated yarn was measured, and the proportion of each yarn in the composite twisted yarn was determined from the measurement result. The spun yarn / polyester multifilament yarn / water-soluble in the composite twisted yarn The ratio of the sex yarn was 65/8/27 (mass ratio).
(3) The same cotton 30 No. 2 yarn as used in (3) of Example 1 was used as the warp, the composite twisted yarn obtained in (1) above was used as the weft, warp 23 / cm, weft 18 A plain weave fabric of / cm was woven (40% of mixed twisted yarn in the plain weave fabric) (weaving speed 0.1 m / min).
(4) The plain weave fabric obtained in (3) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain weave fabric, and then dried. The fabric obtained in this way was easily broken of the polyester multifilaments in the fabric, and the spun yarn was cut off and was not commercial value.

  The above Examples 1 to 6 and Comparative Examples 1 to 5 are summarized in Tables as shown in Tables 1 and 2 below.

As can be seen from the results of Table 1 and Table 2 above, in Examples 1 to 6, a composite twisted yarn obtained by twisting a spun yarn, a non-rubber elastic filament yarn (polyester multifilament yarn) and a water-soluble yarn, The twist direction of the twisted yarn is opposite to the twist direction of the spun yarn, the twist number of the composite twisted yarn is in the range of 0.3 to 2 times the twist number of the spun yarn, and the spun yarn / non-rubber elastic filament yarn / When the ratio of the water-soluble yarn is in the range of 15 to 70/10 to 60/5 to 75 (mass ratio), a high-quality woven or knitted fabric is obtained that is highly stretchable, plump and excellent in lightness. It has been.
In particular, in Examples 1, 2, and 4 to 6 using a non-rubber elastic filament yarn having a crimp elongation (E) of 5% or more, a fabric having a higher stretch rate was obtained after dissolving and removing the water-soluble yarn. Has been obtained.

On the other hand, in Comparative Example 1, the number of twists of the composite twisted yarn is less than 0.3 times the number of twists of the spun yarn, and in Comparative Example 3, the ratio of the water-soluble yarn in the composite twisted yarn is less than 5% by mass. For this reason, the stretchability of the fabric obtained by removing the water-soluble yarn from the fabric produced using the composite twisted yarn is small and lacks in the plump feeling.
In Comparative Example 2, since the composite twisted yarn was manufactured with the number of twists of the composite twisted yarn exceeding twice the number of twists of the spun yarn, the composite twisted yarn was produced with frequent breakage. I can't.
In Comparative Example 4 and Comparative Example 5, since the ratio of the non-rubber elastic filament yarn (polyester filament yarn) in the composite twisted yarn is less than 10% by mass, the water-soluble yarn is dissolved and removed from the woven or knitted fabric produced from the composite twisted yarn. The obtained dough is distorted and inferior in form stability, or the polyester filaments are cut and the spun yarn is lost, so that a dough with commercial value cannot be obtained.

Example 7
(1) Using the composite twisted yarn obtained in (1) of Example 1 as warp and weft, weaved a plain weave fabric of warp 23 / cm and weft 18 / cm (mixed rate of composite twist yarn 100 in plain weave fabric) %). At that time, the weaving process was carried out without sizing the warp and weft, but the plain weave fabric could be woven at high speed without causing any troubles such as thread breakage, and there was no problem in weaving mass productivity. No (weaving speed 0.1 m / min).
(2) The plain woven fabric obtained in the above (1) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain woven fabric, and then dried. The warp direction elongation rate and the weft direction elongation rate of the fabric thus obtained were measured by the above-described method. As a result, the warp direction elongation rate was 23% and the weft direction elongation rate was 25%. Was. In addition, the water-soluble yarn is removed by dissolution with water, and the cotton yarn is soft and has a good cotton texture because the spun yarn occupies the surface of the fabric.

<< Reference Example 1 >>
(1) Using the same cotton No. 30 double yarn as used in (1) of Example 1 as the warp, and using the composite twisted yarn obtained in (1) of Example 1 and the No. 30 cotton double yarn as the weft: 4 (weft number ratio) was used to weave a plain weave fabric of warp 23 / cm and weft 18 / cm (mixing ratio of composite twisted yarn in plain weave fabric 8%) (weaving speed 0.1 m / min).
(2) The plain woven fabric obtained in the above (1) was treated in the same manner as in (4) of Example 1 to dissolve and remove the water-soluble yarn in the plain woven fabric, and then dried. The elongation rate in the weft direction of the fabric thus obtained was 10% when measured by the method described above.

The composite twisted yarn of the present invention is excellent in knitting and weaving properties, does not cause troubles such as yarn breakage when producing a woven fabric or knitted fabric, and also produces a woven or knitted fabric from the composite twisted yarn of the present invention, and is water-soluble in the woven or knitted fabric. By removing the yarn by dissolving it in water, it has high stretchability, is plump and has a good feel and feel, even though it does not use polyurethane elastic yarn, light weight, breathability, etc. In addition, it is possible to obtain a woven or knitted fabric that is excellent in strength and has excellent strength without causing the fibers to come off from the spun yarn forming the woven or knitted fabric. Therefore, the composite twisted yarn of the present invention can be effectively used for the production of the above-described highly stretchable woven or knitted fabric.
The woven or knitted fabric of the present invention obtained by treating the woven or knitted fabric containing the composite twisted yarn of the present invention with water and dissolving and removing the water-soluble yarn in the composite twisted yarn with water has high stretchability, excellent texture, feel, Utilizing characteristics such as lightness and breathability, it can be used in a wide range of fields such as normal clothing, sports clothing, underwear, foundations, elastic bandages, medical applications, vehicle interior materials, belt conveyor fabrics, and other industrial materials. It can be used effectively.

Claims (5)

  A composite twisted yarn in which a spun yarn, a filament yarn without rubber elasticity and a water-soluble yarn are twisted together, wherein the twist direction of the composite twist yarn is opposite to the twist direction of the spun yarn, and the twist number of the composite twist yarn is the twist of the spun yarn 0.3 to 2 times the number, and the proportion of spun yarn is in the range of 15 to 70 mass% based on the mass of the composite twisted yarn, and the proportion of filament yarn having no rubber elasticity is in the range of 10 to 60 mass%. A composite twisted yarn characterized in that the ratio of the inner and water-soluble yarns is in the range of 5 to 75 mass%. 2. The composite according to claim 1, wherein a filament yarn having no rubber elasticity with a value of crimp elongation (E) represented by the following formula (1) of 5% or more is used as the filament yarn having no rubber elasticity. Twisted yarn.

Crimp elongation (E) (%) = {(L ₂ −L ₁ ) / L ₂ } × 100 (1)

[In the formula, L ₁ is an 11110 decitex casket (total length of 50 cm) using a filament thread that does not have rubber elasticity under a tension of 0.044 cN. In this state, apply an initial load of 10 g to the lower end of the casket and leave it in the air (25 ° C., 65% RH) for 5 minutes, then immerse it in a constant temperature water bath at 90 ° C. for 30 minutes with the metal rod passed horizontally. Heat, then remove from the thermostatic water bath and remove only the 10g load, absorb the water adhering to the yarn with paper, dry for 4 hours at room temperature (25 ° C), and then apply 10g load again to the bottom of the casket The total length (cm) of the case when left for 5 minutes at medium (25 ° C., 65% RH) is shown. In addition, L ₂ is the amount of the case when the load of 10 g is removed from the case after the measurement of L ₁ and the load of 1000 g is applied to the lower end of the case and left in the air (25 ° C., 65% RH) for 5 minutes. Total length (cm) is shown. ] A woven or knitted fabric produced using the composite twisted yarn according to claim 1 or 2.   A woven or knitted fabric obtained by dissolving and removing water-soluble yarn in the composite twisted yarn with water from the woven or knitted fabric produced using the composite twisted yarn according to claim 1 or 2. The woven or knitted fabric according to claim 4 , wherein the water-soluble yarn in the composite twisted yarn is dissolved and removed from the woven or knitted fabric containing the composite twisted yarn according to claim 1 or 2 at a ratio of 10% by mass or more.