JP2002069794A - Twist yarn woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a twist yarn woven fabric of a polyester filament free from characteristic slimy feeling of polyester filament and having the feeling of natural fiber fabric comprising the bulkiness, drape property and crispness. SOLUTION: The yarn constituting at least the warp of the woven fabric satisfies the following conditions (1) to (4) and the ratio of the floating yarn of the warp and the weft in the repeating unit texture of the woven fabric is >=1.0. (1) The yarn is composed of two kinds of filament groups having a yarn length difference of >=3% and the yarn has a core-sheath structure containing the longer filament group as the sheath yarn and the shorter filament group as the core yarn, (2) the number of filaments of the filament group constituting the core yarn is >=15 and the number of the filaments of the filament group constituting the sheath yarn is larger than that of the core yarn, (3) the filament of the sheath yarn has dents on the surface and (4) the yarn is twisted at a twist coefficient K of 8,000-23,000.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twisted woven fabric of polyester filaments which eliminates the sliminess peculiar to polyester filaments and improves the swelling feeling.

[0002]

2. Description of the Related Art Conventionally, as a method of improving the texture of a woven fabric composed of polyester filaments, a yarn in which two types of filaments having different shrinkage rates are mixed is used, and a difference in shrinkage is expressed by heat in a dyeing stage to give a woven fabric. Gives swelling, creates voids between filaments by alkali weight reduction processing of textiles, gives soft and drapeable properties to textiles, and uses twisted filament yarns to give textiles a sense of tension and calmness, etc. The method is adopted.

[0003] However, the woven fabric made of polyester filaments has a drawback that the surface of the polyester filaments is smooth, so that it has a slimy feeling and is inferior to natural woven fabrics. However, there is a problem that the disadvantage is not sufficiently solved or the manufacturing cost becomes extremely high.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, eliminates the sliminess peculiar to polyester filaments, and has a swelling, drapability, and stiffness of a polyester filament having a texture like a natural fiber fabric. An object of the present invention is to provide a twisted woven fabric.

[0005]

The gist of the present invention is to provide a woven fabric in which at least the yarn constituting the warp of the woven fabric satisfies the following requirements 1) to 4), wherein the warp and the weft in the repeating unit structure of the woven fabric. Wherein the ratio of floating yarns is 1.0 or more. 1) A core-sheath structure in which the yarn is composed of two types of polyester filaments having a yarn length difference of 3% or more, the filaments having a longer yarn length are sheath yarns, and the filaments having a shorter yarn length are core yarns. Are formed. 2) The number of filaments of the filament group of the core yarn is 15 or more, and the number of filaments of the filament group of the sheath yarn is larger than the number of filaments of the core yarn. 3) There is a concave portion on the surface of the filament of the sheath yarn. 4) The yarn has a twist coefficient K (K = T√D (T: the number of twisted yarns (twice /
m), D: decitex)) are twisted from 8000 to 23000.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The polyester in the present invention is a polyester containing terephthalic acid or an ester derivative thereof as a main acid component and ethylene glycol as a main glycol component. Examples of the polyester include aliphatic dicarboxylic acids and other aromatic dicarboxylic acids. An acid or an ester derivative thereof or a third component such as propylene glycol or ethylene glycol may be contained.

The yarn constituting at least the warp of the warp and the weft of the twisted woven fabric of the present invention is composed of two types of polyester filaments having a yarn length difference of 3% or more, and has a long yarn length in a woven state. A core-sheath structure is formed in which one filament group is a sheath yarn and the shorter filament group is a core yarn, and a swelling texture is obtained by forming the core-sheath structure in a woven state. Can be In order to form a core-sheath structure, the difference in yarn length between the two polyester filament groups needs to be 3% or more, and preferably 30% or less. If a certain texture cannot be obtained and the yarn length difference exceeds 30%, snagging and pilling tend to occur.

[0008] To measure the yarn length difference, a yarn having a core-sheath structure formed from a woven fabric is pulled out so as not to apply tension as much as possible, a mark is made on the yarn at a length of 10 cm, and the yarn is inspected. The twist is released by a twisting machine, the core yarn and the sheath yarn are separated, the length between the marks of each yarn is measured, and the yarn length difference is obtained by the following formula. Yarn length difference (%) = [(sheath length-core yarn length) / (core yarn length)] × 100

[0009] Further, in the yarn having a core-sheath structure constituting at least a warp, the number of filaments of the core yarn is 15 or more, and the number of filaments of the sheath yarn group is equal to that of the filament group of the core yarn. It must be larger than the number of filaments. When the number of filaments in the filament group of the core yarn is less than 15, at least the filament group to be the core yarn and the filament to be the sheath yarn for improving the passability of the subsequent steps in the production process of the yarn to be used for the warp Entanglement with the group becomes insufficient.

[0010] If the number of filaments in the sheath yarn is smaller than the number of filaments in the core yarn, a sufficiently swelling texture cannot be obtained, and the sheath yarn having a concave portion on the filament surface is not sufficiently formed on the woven fabric surface. It is not exposed, and the effect of eliminating the slimy feeling due to the concave portion on the filament surface of the sheath yarn is not exhibited.

The yarn constituting at least the warp of the twisted woven fabric of the present invention needs to have a concave portion on the filament surface of the sheath yarn having a core-sheath structure. The recesses on the surface of the filament of the sheath yarn include holes satisfying the requirements of a) to c) and d).
To (h), having 10 to 100 cracks per 10 μm ^{2 on the} surface of the filament. a) The length extending in the fiber axis direction is 0.1 to 4.0 μm. b) The length extending in the direction perpendicular to the fiber axis is 0.1 to 3.0 μm
m. c) The ratio of the length extending in the fiber axis direction / the length extending in the direction perpendicular to the fiber axis is 0.3 to 3.0. d) The length extending in the fiber axis direction is 0.1 to 4.0 μm. e) The length extending in a direction perpendicular to the fiber axis is 0.1 to 10.0.
μm. f) The ratio of length extending in the fiber axis direction / length extending in the direction perpendicular to the fiber axis is less than 0.05 to less than 0.3. g) The distance between adjacent cracks is longer than the length extending in the direction perpendicular to the fiber axis of each adjacent crack. h) The ratio of cracks occupying the concave portions is 50% or less.

The filament surface of the core yarn may have a concave portion, but the core yarn has a role of maintaining the strength as a yarn and maintaining the fabric strength. It is preferable that the number of recesses is less than the number of recesses on the surface of the filament of the sheath yarn or there is no recess because the strength of the yarn is reduced.

Regarding the requirements of a) to c), if the length of the hole extending in the fiber axis direction is less than 0.1 μm, the texture effect for eliminating the feeling of slimy is not exhibited, and if it exceeds 4.0 μm, the fiber becomes fibril. And fuzz is generated, causing trouble in the process. The length of the hole extending in the direction perpendicular to the fiber axis is 0.1
If it is less than μm, the texture effect is not exhibited, and if it exceeds 3.0 μm, the touch becomes rough, and the ratio of the length of the hole extending in the fiber axis direction / the length of the hole extending in the direction perpendicular to the fiber axis. If it is less than 0.3, the fiber strength is reduced, causing quality trouble. If it is more than 3.0, fluff is liable to occur and the quality is reduced.

Regarding the requirements of d) to h), if the length of the crack extending in the fiber axis direction exceeds 0.1 μm, the feeling effect is not exhibited, and if it exceeds 4.0 μm, the fibers fibrillate and fluff is generated. Cause process trouble.
The length extending in the direction perpendicular to the fiber axis of the crack is 0.1 μm
If it is less than 10 μm, the texture effect is not exhibited, and if it exceeds 10.0 μm, the fiber strength is reduced, causing quality problems.
If the ratio of the length extending in the fiber axis direction / the length extending in the direction perpendicular to the fiber axis is less than 0.05, the fiber strength is reduced and causes quality trouble. If it exceeds 0.3, the texture effect is not exhibited. . If the distance between adjacent cracks is shorter than the length of each adjacent crack extending in the fiber axis direction, the portion between the cracks will fall off, resulting in a large crack extending in the fiber axis direction, and the fiber strength will decrease. It causes quality trouble. On the other hand, if the proportion of cracks in the recesses exceeds 50%, the fiber strength is reduced, fuzz is generated, causing troubles in the process, the texture is rough, and the commercial value is low.

The recesses on the filament surface of the sheath yarn are indispensable for obtaining a feeling of a natural fiber woven fabric without sliminess, and the number of the recesses on the filament surface of the sheath yarn is 10 μm ^2.
If the number is less than 10 pieces, there is no effect of eliminating the slimy feeling and 1
If it exceeds 100 per 0 μm ² , a rough feeling is generated, and the feeling of wearing is poor when it is made into clothing. The measurement of the concave portion on the filament surface is performed by measuring the length / width ratio of 20 concave portions at an arbitrary photographing position with an electron microscope at a magnification of 2500 times, and if 80% of the number satisfies the requirement of the hole and the crack. Good. When measuring the length of the crack extending in the direction perpendicular to the fiber axis when measuring the crack, if the crack extends to the back side of the photograph and the total length cannot be measured, it is sufficient if 80% of 20 cracks can be measured. Measure. 80%
If it is less than that, re-photograph another part and measure. Also, cracks extending in the perpendicular direction have a remarkable effect on eliminating the feeling of sliminess, but when the ratio of cracks occupying the crack recesses exceeds 50%, the yarn strength becomes weak, and fluff is generated,
This causes poor sewing processes and lowers the quality of sewn clothing.

Further, at least the yarn constituting the warp of the twisted woven fabric of the present invention has a twist coefficient K (K = T√D (T:
The number of twists (twice / m), D: decitex) is 8000 to 2
It is necessary that 3,000 twists are applied, and in addition to the effect of eliminating the slimy feeling due to the concave portion on the filament surface of the sheath yarn, drapeability and tension are imparted to the woven fabric. The twist also adds the effect of eliminating the slimy feeling. If the twist coefficient K is less than 8000, the fabric is lacking in tension, and if it exceeds 23000, a hard woven fabric is obtained.

When the woven fabric is sewn as a garment, the garment is cut in the longitudinal direction of the woven fabric, cut and cut, and the texture of the garment is greatly affected by the warp yarns appearing on the fabric surface in the fabric structure. In the twisted woven fabric of the present invention, the ratio of the floating yarn of the warp to the floating yarn of the weft in the repeating unit structure of the woven fabric (the warp) in order to sufficiently exhibit the effect of at least the yarn constituting the warp of the woven fabric. (The number of floating yarns / the number of floating yarns of wefts) is required to be 1.0 or more. Here, the float of the warp means that the warp is located on the weft, and the float of the weft means that the weft is located on the warp, and is based on the fabric surface used on the front side of the garment.

A part of the twisted woven fabric of the present invention may contain a cationic dye-dyed polyester filament group, and the form containing the cationic dye-dyed polyester filament group may be combined with a yarn constituting a warp and / or a weft. It may be contained as a yarn or may be interwoven as a weft, and when a cationic dye-dyed polyester multifilament group is contained, a woven fabric having a rich color change is obtained.

The twisted woven fabric of the present invention can be manufactured as follows. That is, the twisted woven fabric of the present invention is composed of a heat-shrinkable polyester multifilament having 15 or more filaments and a polyester containing a fine pore-forming agent, and has a lower heat shrinkage or a larger number of filaments than the heat-shrinkable polyester multifilament. It consists of a heat-extensible polyester multifilament and has a boiling water shrinkage difference of 10
% Of a composite yarn obtained by fluid processing of two or more polyester multifilaments having a twist coefficient K of 8000 to 2300.
0, and used for at least the warp of the warp and the weft, and woven into a woven fabric in which the ratio of the float of the warp to the float of the weft in the repeating unit structure of the fabric is 1.0 or more. It can be obtained by sequentially performing a relaxation treatment with hot water at a temperature of not less than ° C., an alkali weight reduction process, and a dyeing.

It is necessary that at least the yarn to be provided to the warp is a yarn capable of forming a core-sheath structure under a woven fabric form without forming a core-sheath structure in a yarn form before weaving. The heat-shrinkable heat-shrinkable polyester multifilament is the core yarn, and the heat-shrinkable or heat-extensible polyester multifilament is the core sheath of the heat-shrinkable polyester multifilament at least in the yarn constituting the warp in the woven form by the alkali weight reduction processing. A structure is formed, and a recess is formed on the filament surface of the heat-shrinkable or heat-extensible polyester multifilament of the sheath yarn. In addition to the color by the usual disperse dye by dyeing, the color by the cationic dye is added when a part of the woven fabric contains a polyester dye-dyeable polyester multifilament.

In the production of the twisted woven fabric of the present invention, two kinds of polymers having different intrinsic viscosities or two kinds of polymers having different heat shrinkages are joined as the heat-shrinkable polyester multifilament which becomes the core yarn of the core-sheath structure. It is preferable to use a conjugated yarn, and when the heat-shrinkable polyester multifilament serving as the core yarn is a conjugated yarn, the woven fabric has stretchability and more swelling.

The heat-shrinkable or heat-extensible polyester multifilament which forms a sheath yarn having a core-sheath structure includes:
In forming a concave portion on the filament surface, silica,
A multifilament obtained by spinning and drawing a polyester containing preferably 0.3 to 2% by weight of a fine pore-forming agent of fine particles easily soluble in alkali such as titanium oxide and alumina under ordinary conditions is used. When a crack extending in a direction perpendicular to the fiber axis is formed in addition to a hole extending in the fiber axis direction as a recess on the filament surface, an undrawn yarn obtained by spinning a polyester containing a fine pore-forming agent is drawn in the fiber axis direction. In this case, a multifilament drawn yarn heat-fixed while partially leaving a low orientation portion is used.

The heat-shrinkable polyester multifilament and the heat-shrinkable or heat-extensible polyester multifilament are used as a composite yarn by fluid processing. As the fluid processing, interlace processing or fluid turbulent flow processing is used. In the interlacing process, 40-80 per 1 m of yarn was taken into consideration in terms of the balance between the passability of the yarn and the formation of the core-sheath structure.
Entangled parts, and in fluid turbulent flow machining, 15
It is preferable to perform processing such that a loop of 0.15 mm or more protruding from the 0 to 350 yarn surfaces is formed in the composite yarn.

In order to form a core-sheath structure on at least the yarn constituting the warp in the woven form, the difference in yarn length is 3%.
It is necessary to generate a difference in shrinkage as described above, and the expression of the difference in shrinkage is determined by the combination of the heat-shrinkable polyester multifilament and the heat-shrinkable polyester multifilament in hot water before the alkali weight reduction processing. For example, the heat-shrinkable polyester multifilament is highly heat-shrinkable, and if the heat-shrinkable polyester multifilament is combined with the heat-extensible polyester multifilament, the heat-shrinkable polyester multifilament is heat-shrinkable and the heat-extensible polyester is heated. This is performed by thermally elongating the multifilament.

When a concave portion is formed on the filament surface of the heat-shrinkable or heat-extensible polyester multifilament, which becomes a sheath yarn having a core-sheath structure, weight loss by alkali such as caustic soda and caustic potash which is usually applied to polyester fiber is used. An alkali weight reduction process at a rate of 10 to 30% by weight is performed. In this alkali weight reduction processing, the fine pore forming agent present in the filament surface layer elutes, and pores extending in the fiber axis direction are formed on the filament surface. When a drawn yarn having a partially low-oriented portion is used, in addition to the hole extending in the fiber axis direction as a concave portion, the low-oriented portion of the filament is more affected by alkali, and the low-oriented portion and the vicinity thereof have a direction perpendicular to the fiber axis. Cracks are formed.

The woven fabric can be dyed with a disperse dye by any means. When the woven fabric contains a cationic dye-dyeable polyester multifilament as a composite yarn or interwoven, the disperse dye and the cationic dye are mixed. To give a twisted woven fabric of the present invention.

[0027]

The present invention will be described below in more detail with reference to examples.

(Example 1) Semi-Dal 56 dtex / 36 filament containing 0.5% by weight of titanium oxide and drawn polyethylene terephthalate yarn a having a boiling water shrinkage of 17%
And a polymer containing 0.8% by weight of silica and a spinning speed of 25.
The undrawn yarn spun at 00 m / min is subjected to a pin temperature of 90 ° C., a draw ratio of 1.632 times (maximum draw ratio × 0.54), and a yarn speed of 53.
The thick and thin yarn obtained by drawing at 0 m / min is further heat-treated at 180 ° C.
A 48-filament, polyethylene terephthalate drawn yarn b having a boiling water shrinkage of 4% was mixed with an overfeed ratio of 0.6.
%, Interlace processing with air pressure of 0.3 MPa
A composite yarn having 60 entangled portions per m was obtained. This composite yarn was twisted at 2,000 turns / m with a double twister to obtain a twisted yarn.

The twisted yarn was used as a warp and a weft, and woven into a Venetian fabric having a ratio of the float of the warp to the float of the weft in the repeating unit structure of 1.5. This fabric is subjected to a relaxing treatment in hot water at 120 ° C.
It was finished by 7% by weight alkali reduction and dyeing at 130 ° C. in a disperse dye solution. The obtained woven fabric was a spun-like twisted woven fabric like a natural fiber woven fabric without slimy feeling.

When the warp and the weft were unwound from the woven fabric and the morphology was observed, the filament group of the drawn yarn a was the core yarn and the filament group of the drawn yarn b was the core-sheath structure of both the warp and the weft. The difference in length between the core yarn and the sheath yarn in the warp was 15%, and the difference in the yarn length between the core yarn and the sheath yarn in the weft was 12%. Further, holes and cracks were photographed at 2500 times magnification on the filament surface of the sheath yarn using an electron micrograph, and the shapes of adjacent holes and 20 cracks were measured. 2 μm, a hole extending in a direction perpendicular to the fiber axis is 1.0 μm on average, and a ratio of length extending in the fiber axis direction / length extending in a direction perpendicular to the fiber axis is 1.2 on average, and extending in the fiber axis direction. Average length 0.6
μm, the average length extending in the direction perpendicular to the fiber axis is 6.0μ
m, a concave portion consisting of a crack having a ratio of length extending in the fiber axis direction / length extending in a direction perpendicular to the fiber axis of 0.1 is 10 μm.
m ² 35 pieces exist per cracks accounting for 5 percent of the recess, the distance between the cracks averaged 2.4 [mu] m.

Comparative Example 1 Using the twisted yarn obtained in Example 1,
Using the warp and the weft, the fabric was woven into a satin-textured fabric in which the ratio of the float of the warp to the float of the weft in the repeating unit structure was 0.25, and finished in the same manner as in Example 1. In the obtained woven fabric, the warp and the weft extracted from the woven fabric were the same as those in Example 1.
, But a spun woven fabric with swelling but lacking spun-like texture.

Comparative Examples 2-3 Titanium oxide 0.5% by weight
Containing semi-dal 56 dtex / 36 filaments,
A drawn polyethylene terephthalate yarn a having a boiling water shrinkage of 17% and a polyester polymer containing 0.8% by weight of silica were spun at a spinning speed of 2400 m / min.
Thick and thin yarn obtained by drawing at 0 ° C., a draw ratio of 1.632 times, and yarn speed of 530 m / min, is further heat-treated at 180 ° C., and is obtained by heat-treating at 180 ° C./80 filaments / 24 filaments, having a boiling water shrinkage of 4%. Combined with d, 0.6% overfeed ratio, 0.3MP air pressure
The composite yarn having 55 entangled portions per 1 m of the yarn was obtained by interlacing in a. Using this composite yarn, the following Example 1
In the same manner as, twisting, weaving, relaxing treatment with hot water,
Alkali weight reduction processing and dyeing were sequentially performed and finished. However, in the obtained woven fabric, since the number of filaments of the sheath yarn was smaller than the number of filaments of the core yarn, the filament group of the core yarn appeared on the surface and the irritation was conspicuous. .

An undrawn yarn obtained by spinning a polymer containing 0.8% by weight of silica at a spinning speed of 2500 m / min was drawn at a pin temperature of 90 ° C., a draw ratio of 1.632, and a yarn speed of 530 m / min. 80 obtained by further heat treating the thick and thin yarn at 180 ° C.
Decitex / 48 filament, stretched polyethylene terephthalate yarn b having a boiling water shrinkage of 4% and titanium oxide 0.5
In a similar manner, a composite yarn having 45 entangled portions per 1 m of yarn was obtained by interlacing with a combination of a semi-dal 56 decitex / 8 filament containing 5% by weight and a stretched polyethylene terephthalate yarn c having a boiling water shrinkage of 17%. Using this composite yarn, twisting, weaving, relaxing treatment with hot water, alkali weight reduction processing, and dyeing were successively performed in the same manner as in Example 1 to finish the composite yarn. In the twisting process, loops are generated in the pan winding machine and thread breakage occurs frequently, and the resulting fabric has too few filaments of the core yarn, so that the filament group serving as the core sheath is poorly separated, and Was noticeable.

(Comparative Example 4) Semi-Dal 56 dtex / 36 filament containing 0.5% by weight of titanium oxide, drawn polyethylene terephthalate yarn a having a shrinkage factor of 17% in boiling water a
And a stretched polyethylene terephthalate yarn e having a semi-dal 80 dtex / 48 filament containing 0.5% by weight of titanium oxide and a shrinkage ratio of boiling water of 4%, interlaced at an overfeed rate of 0.6% and an air pressure of 0.3 MPa to obtain a yarn. A composite yarn having 60 entangled portions per meter was obtained. Using this composite yarn, in the same manner as in Example 1, twisting, weaving, relaxation treatment with hot water, alkali weight reduction processing, and dyeing were sequentially performed to finish. Although the obtained woven fabric had a swelling, it had a slimy feeling and was far from the texture of a natural fiber woven fabric.

Further, when the warp and the weft were removed from this woven fabric and the yarns were observed, the filament group of the drawn yarn a was the core yarn, and the filament group of the drawn yarn e was the core-sheath structure of both the warp and the weft. The difference in length between the core yarn and the sheath yarn in the warp was 15%, and the difference in the length between the core yarn and the sheath yarn in the weft was 12%. Was observed, but no holes or cracks were observed.

(Example 2) 56 dtex / 30 filaments produced by laminating two kinds of polyethylene terephthalate polymers having intrinsic viscosities of 0.5 and 0.6 at the time of spinning at a ratio of 1: 1 and a shrinkage ratio of boiling water of 13 % Of the conjugate yarn f and a polymer containing 0.8% by weight of silica at a spinning speed of 3000 m / min. 80 dtex / 48 filaments obtained by heat setting at 0.9 ° C. and a magnification of 0.9 times, and a stretched polyethylene terephthalate yarn g having a boiling water shrinkage of -1% were subjected to air pressure of 0.5 MPa
A composite yarn having 243 loops per meter of yarn was obtained by fluid turbulence processing in a. This composite yarn is double twisted with 1
Twisting was performed 200 times / m to obtain a twisted yarn.

The twisted yarn is used as a warp, and a 167 decitex / 48 filament cationic dye dyeable yarn made of polyethylene terephthalate of dimethyl sulfoisophthalate% copolymer is used as a weft by a double twister.
A twisted yarn having a twist of 00 turns / m was woven into a woven fabric having a twill structure in which the ratio of the floating yarn of the warp to the floating yarn of the weft in the repeating unit structure was 1.0. 120 ° C
Was subjected to a relaxation treatment in hot water, a weight loss of 15% by weight, an alkali weight reduction treatment, and dyed at 125 ° C. in a mixed solution of a disperse dye and a cationic dye to give a different color. The resulting fabric is
It was a spun-like texture with a swelling-like natural fiber fabric without a slimy feel, and was a rich, colorful, high-quality twisted yarn fabric.

Further, when the warp was removed from the woven fabric and the morphology was observed, the filament group of the conjugate yarn f formed a core yarn, and the filament group of the drawn yarn g formed a core-sheath structure of a sheath yarn. The yarn length difference between the core yarn and the sheath yarn was 18%. Also, holes and cracks were photographed at 2500 times magnification on the filament surface of the sheath yarn by electron micrograph.
When measuring the shape of adjacent holes and 20 cracks,
The length extending in the fiber axis direction is 1.0 μm on average, the length extending in the direction perpendicular to the fiber axis is 0.9 μm on average, and the ratio of the length extending in the fiber axis direction / length extending in the direction perpendicular to the fiber axis is 1 on average. .1 hole and the length extending in the fiber axis direction is 0.6 μm on average
m, the length extending in the direction perpendicular to the fiber axis is 5.0 μm on average,
The ratio of the length extending in the fiber axis direction to the length extending in the direction perpendicular to the fiber axis in the direction perpendicular to the fiber axis is 0.12.
There were 31 per μm ² , cracks occupied 3% of the recesses, and the average distance between cracks was 2.4 μm.

[0039]

The twisted yarn fabric of the present invention eliminates the sliminess peculiar to polyester filament, has a swelling, drape property, and a spun-like texture like a natural fiber fabric with stiffness, suits, dresses, blouses, and the like. It is useful as cloth for clothing such as slacks.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 4L036 MA05 MA33 PA21 PA42 PA46 UA01 4L048 AA20 AA21 AA27 AA36 AA41 AA47 AA50 AA56 AB07 AB08 AB12 AB19 AB21 AB24 BA01 BA02 CA12 CA13 CA16 DA01 EB04 EB05

Claims (4)

[Claims] 1. A woven fabric in which at least the yarn constituting the warp of the woven fabric satisfies the following requirements 1) to 4), wherein the ratio of the floating yarn of the warp to the floating yarn of the weft is 1 in the repeating unit structure of the woven fabric. 0.0 or more. 1) A core-sheath structure in which the yarn is composed of two types of polyester filaments having a yarn length difference of 3% or more, the filaments having a longer yarn length are sheath yarns, and the filaments having a shorter yarn length are core yarns. Are formed. 2) The number of filaments of the filament group of the core yarn is 15 or more, and the number of filaments of the filament group of the sheath yarn is larger than the number of filaments of the core yarn. 3) There is a concave portion on the surface of the filament of the sheath yarn. 4) The yarn has a twist coefficient K (K = T√D (T: the number of twisted yarns (twice /
m), D: decitex)) are twisted from 8000 to 23000. 2. The method according to claim 1, wherein the recesses on the surface of the filament of the sheath yarn are a).
And c) satisfying the requirements d) to h), and the number of concave portions is 10 per 10 μm ^2.
The twisted woven fabric according to claim 1, wherein the number is from 100 to 100. a) The length in the fiber axis direction is 0.1 to 4.0 μm. b) The length in the direction perpendicular to the fiber axis is 0.1 to 3.0 μm. c) The ratio of length in the fiber axis direction / length in the direction perpendicular to the fiber axis is from 0.3 to 3.0. d) The length in the fiber axis direction is 0.1 to 4.0 μm. e) The length in the direction perpendicular to the fiber axis is 0.1 to 10.0 μm. f) The ratio of length in the fiber axis direction / length in the direction perpendicular to the fiber axis is 0.05 to less than 0.3. g) The distance between adjacent cracks is greater than the length of each adjacent crack in the direction perpendicular to the fiber axis. h) The ratio of cracks occupying the concave portions is 50% or less. 3. The twisted yarn fabric according to claim 1, wherein the polyester filament group serving as a core yarn is composed of a conjugate filament in which two kinds of polymers are joined. 4. The twisted woven fabric according to claim 1, wherein a part of the woven fabric contains a cationic dye-dyed polyester multifilament.