JPH11323697A - Stretchable polyester fabric and method for producing the same - Google Patents

Abstract

(57) [Summary] [Problem] To provide a stretchable polyester fabric having a swelling texture, a firmness and a feeling of waist, and a smooth and comfortable stretch property when worn as clothing. SOLUTION: Two kinds of polyester polymers having different viscosities are joined, and the single fiber fineness is 4 denier or more and 10,000.
/ D ^1/2 (D: denier) 7%
As described above, the conjugate filament yarn having a crimp expression elongation rate of 0.2% or more and another filament yarn have a confounding number of 20 to 100 / m or a loop number of 200 to 500 /
m to form a confounding or loop and to form a composite, and a twist coefficient A (A
= TD1 / ² , T: number of twisted yarns (times / m), D: denier)
Is composed of a composite yarn having a twist of 8000 to 23000, and the fabric is contracted by 15 to 50% at a shrinkage rate in the longitudinal direction of the composite yarn by heating and relaxing, thereby elongating the composite yarn in the longitudinal direction. Rate is 5-30%, elongation recovery rate is 85
% Or more and the dry heat shrinkage is 5% or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretchable polyester fabric having a swelling texture and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method for obtaining a stretchable polyester fabric having a swelling texture, a woven fabric is formed by using a composite yarn of a high-shrinkable yarn and a low-shrinkable or stretchable yarn, and dyeing is performed. There is known a method of shrinking the highly shrinkable yarn by heat in the heat relaxation treatment in the step (i). However, such a method has a problem that the density of the woven fabric becomes compact and the woven fabric becomes hard and does not stretch smoothly when worn as a product.

[0003]

SUMMARY OF THE INVENTION According to the present invention, a conjugate filament yarn which exhibits crimping by heat is used instead of a highly shrinkable yarn in a composite yarn, and the conjugate filament yarn is crimped by heat. Is based on the fact that the conjugate filament yarn substantially contracts in the longitudinal direction to form a core-sheath structure that expands and contracts. SUMMARY OF THE INVENTION An object of the present invention is to provide a stretchable polyester fabric having a swelling texture, a firm feeling, a feeling of waist, and a smooth and comfortable stretch property when worn as clothing.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a conjugate filament yarn in which two kinds of polyester polymers having different viscosities are joined, and has a single fiber fineness of 4 denier or more and 10,000 / D ^1/2 (D : Denier) The conjugate filament yarn having a stretch recovery ratio of 7% or more and a crimp expression elongation ratio of 0.2% or more and another filament yarn in a twist yarn of 20 to 100 / m or Number of loops 20
0 to 500 yarns / m are entangled or looped to form a composite, and the twisting coefficient A (A = TD1 / ² , T: the number of twisted yarns (twice /
m), the woven fabric is composed of a twisted composite yarn having a denier of 8000 to 23000, and the elongation percentage in the longitudinal direction of the composite yarn is 5 to 30%, and the elongation recovery rate is 85%.
And a conjugate filament yarn in which two kinds of polyester polymers having different viscosities are joined together, wherein the single fiber fineness is 4% or less. Denier or more, 10
The number of entangled conjugate filament yarns having a stretch recovery ratio of 7% or more and a crimp development / elongation ratio of 0.2% or more with other filament yarns of 2,000 / D1 / ² (D: denier) twisted yarns. 20-100 pieces / m or 200-500 loops
Pieces / m and compounded by fluid treatment to obtain a twist coefficient A
(A = TD1 / ² , T: number of twisted yarns (times / m), D: denier) Using a twisted composite yarn of 8000 to 23000, weaving it into a woven fabric, then heating and relaxing the woven fabric A method for producing a stretchable polyester fabric, characterized in that the composite yarn used after the treatment is shrunk by 15 to 50% in the longitudinal direction at a shrinkage ratio to the original length of the fabric.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The conjugate filament yarn of the present invention is composed of a conjugate filament to which two kinds of polyester polymers having different viscosities are joined. The two types of polyester polymers desirably have a difference in intrinsic viscosity of 0.100 or more. Each polyester polymer may be a polyester polymer mainly composed of ethylene terephthalate units or tetramethyl terephthalate units. As the article, polyethylene terephthalate is a low-viscosity polymer and high-viscosity polymer, or polyethylene terephthalate is a low-viscosity polymer, and the third component is a high-viscosity polymer of a copolymerized polyester mainly composed of ethylene terephthalate units obtained by copolymerizing 5 to 15 mol%. It is preferably a conjugate filament yarn in which two kinds of polyester polymers are joined.

As the third component of the copolyester which is preferable as a bonding component of the conjugate filament yarn, isophthalic acid, adipic acid, 2,2-bis [4-
(2-hydroxyethoxy) phenyl] propane, 5-
And sodium sulfoisophthalic acid. More preferred copolymerized polyesters include copolymerized polyesters mainly composed of ethylene terephthalate units, which are obtained by copolymerizing isophthalic acid, adipic acid, and 5-sodium sulfoisophthalic acid alone or in combination. In the present invention, the two kinds of polyester polymers having different viscosities may be cationic dye-dyeable polymers, and in particular, cationic dye-dyeable polymers mainly composed of ethylene terephthalate units copolymerized with 5-sodium isophthalic acid as the third component. When the copolymer is a polyester copolymer, the design effect of the woven fabric is enhanced.

[0007] In the conjugate filament yarn of the present invention, the joining ratio (weight) of the two polyester polymers is
30/70 to 70/30, more preferably 40/60
It is desirable to be joined to 60/40. Also,
The conjugate filament yarn has a single fiber fineness of 4 denier or more, and if the single fiber fineness is less than 4 denier, it eventually becomes a woven fabric lacking firmness and stiffness.

In the present invention, the conjugate filament yarn formed by joining two kinds of polyester polymers having different viscosities has an elasticity recovery ratio of 10,000% / D ^1/2 (D: denier) of 7%. As described above, it has shrinkage characteristics in which the crimp development and elongation rate is 0.2% or more. The elasticity recovery ratio is a value indicating the strength of the crimp of the yarn measured according to JIS L-1090. If the elasticity recovery ratio is less than 7%, the yarn is crimped weakly and the restoring force at the time of elongation in the woven fabric is weak. . The crimp expression elongation rate was determined by rotating the yarn 5 times with a 1.125 m circumference measuring machine to form a skein, and drying the skein at 150 ° C. for 5 minutes under an initial load of 0.02 times the apparent denier. Length L at the time of heat treatment
After obtaining 1, the weight was removed and a load 0.1 times the apparent denier was applied to determine the length L2.
It is calculated by the formula of [(L2-L1) / L1] × 100.
If the crimping expression elongation ratio is less than 0.2%, the elongation of the yarn is weak and the elongation in the woven fabric is lacking.

In the conjugate filament yarn of the present invention, the respective melt streams of two kinds of polyester polymers having different viscosities are merged almost plane-symmetrically at the upstream portion of the spinneret to form a composite stream. It is possible to obtain a good stability by discharging from a discharge hole having a conical divergent opening at the tip end following the fine pore portion at a discharge linear velocity of 5 to 14 cm / sec.

The conjugate filament yarn is used as a composite yarn with another filament yarn.
The formation of the composite yarn of the conjugate filament yarn and the other filament yarn is performed by interlacing the conjugate filament yarn and the other filament yarn by a compounding means for performing fluid treatment using air such as a Taslan process. Done.

The fluid treatment is performed by injecting air such that the number of confounds is 20 to 100 pieces / m in the interlace processing and 200 to 500 pieces / m in the number of loops in the Taslan processing. If the number of entanglements in the interlace processing is less than 20 / m, the processability in the subsequent twisting step is poor, and if it exceeds 100 / m, the woven fabric lacks swelling due to a large binding force between filaments.
If the number of loops in the Taslan processing is less than 200 / m, the passability in subsequent steps is poor, and the number of loops is 500 / m.
When it exceeds, fastener ring occurs when it is made into a woven fabric.

The composite ratio of the conjugate filament yarn and the other filament yarn is 10 to 80% by weight of the conjugate filament yarn and 90% by weight of the other filament yarn.
When the conjugate filament yarn is less than 10% by weight, stretchability in the woven fabric is hardly exhibited, and when it exceeds 80% by weight, the processability deteriorates.

As the other filament yarn to be combined with the conjugate filament yarn, a filament yarn composed of a polyester polymer mainly composed of ethylene terephthalate units is preferably used.
3% to 0% extensible polyester filament yarn, cationic dyeable polyester filament yarn, thick and thin polyester filament yarn having a birefringence Δn of 30 to 80 × 10 ^{-3 in} the thick portion, titanium oxide 1 to 3 The birefringence Δn of the polyester filament yarn containing 1% by weight and the thick portion containing 1 to 3% by weight of titanium oxide is 30 to 8
Preferred are 0 × 10 ⁻³ thick and thin polyester filament yarns, which may be used alone or in combination.

[0014] These filament yarns preferably used can be obtained as follows. The stretchable polyester filament yarn having a boiling water shrinkage of -3 to 0% is
For example, a highly oriented unstretched yarn having a birefringence Δn of 30 to 70 × 10 ⁻³ is obtained by setting the first-stage stretch ratio to a maximum stretch ratio of 0.4 to
0.5 times, the first-stage take-up roller temperature is a glass transition temperature to + 20 ° C., and the second-stage stretch ratio is 1.03 to 1.4.
It can be obtained by performing a two-stage stretching at a temperature of less than the crystallization temperature at a temperature lower than the crystallization temperature by a factor of 0 and a relaxation heat treatment at a temperature equal to or higher than the first-stage pulling roller temperature + 50 ° C. to a relaxation rate of 5% or more.

[0015] The cationic dyeable polyester filament yarn is formed by using an alkali metal salt such as 5-sulfoisophthalic acid or 2-sulfoisophthalic acid, 1,8-dicarboxynaphthalene-3-sulfonic acid or a fatty acid such as adipic acid. Spinning a copolymerized polyester polymer mainly composed of ethylene terephthalate units, preferably a copolymerized polyester polymer mainly composed of ethylene terephthalate units copolymerized with 2-3 mol% of 5-sodium sulfoisophthal and 3-6 mol% of adipic acid. Obtained by
It has dyeability for cationic dyes.

The thick part has a birefringence Δn of 30 to 80 × 1.
0 ^-3 thick and thin polyester filament yarn Article of, for example, an undrawn yarn, 100 ° C. ~ surface sliding friction crystallization temperature below the temperature on stretching rollers 4.0 to 6.0, the natural stretch ratio Below 70% elongation at break after drawing
The unstretched yarn is stretched at a draw ratio as described above, and is heat-treated at a draw ratio of 1.001 to 1.040 while running on a heating body at a temperature from the glass transition temperature to the crystallization temperature of the undrawn yarn.

A polyester filament yarn containing 1 to 3% by weight of titanium oxide is usually referred to as a full-dull yarn, and is preferably added to an anatase type primary particle having an average particle diameter of 0.1 to 1 μm in a reaction system at the time of polyester production. It is obtained by spinning a polyester polymer containing 1 to 3% by weight of titanium oxide. The thick and thin polyester filament yarn having a birefringence .DELTA.n of 30 to 80.times.10.sup.- ³ of a thick portion containing 1 to 3% by weight of titanium oxide is a polyester polymer used to obtain the thick and thin polyester filament yarn. By using a polyester polymer in which 1 to 3% by weight of titanium oxide is added to the reaction system.

Prior to weaving, the composite yarn of the conjugate filament yarn and another filament yarn is subjected to a twist coefficient A
(A = T · D ^1/2 , T: number of twisted yarns (twice / m), D: denier) It is necessary to perform twisting of 8000 to 23000. When the twist coefficient A is less than 8000, the woven fabric lacks firmness and stiffness when the woven fabric is formed due to insufficient binding force between filaments. When the twist coefficient A exceeds 23,000,
The binding force between the filaments is too strong, resulting in a woven fabric lacking extensibility.

The twisted composite yarn is used and woven as a warp or a weft or as a warp and a weft. The woven structure is not particularly limited, but is preferably a structure that does not impair the elasticity of the constituent yarn itself, for example, a warp double structure, a twill structure, or the like.

The woven fabric of the present invention has a longitudinal elongation of 5 to 30%, an elongation recovery of 85% or more, and a dry heat shrinkage of 5% or less of a warp or a weft or a composite yarn existing as a warp and a weft. Yes, the fabric has a so-called stretch property in which the fabric stretches and recovers. The elongation of the woven fabric in the present invention,
Based on JIS L-1096, method B (constant load method), the elongation recovery rate is JIS L-1096, method B (constant load method)
Is the elongation recovery rate after one hour of standing time, and the dry heat shrinkage rate is the shrinkage rate after suspending the fabric for 3 minutes in a dry heat constant temperature room at 160 ° C. If the elongation ratio is less than 5%, extensibility is lacking, and if it exceeds 30%, trouble occurs at the time of sewing. When the elongation recovery rate is less than 85%, the recovery property is poor, and the shape retention of the woven fabric is deteriorated. On the other hand, when the dry heat shrinkage exceeds 5%, the shrinkage occurs due to ironing or the like, and the dimensional stability of the fabric deteriorates.

Such a woven fabric is woven by using a composite yarn to form a woven fabric, and then subjected to a heat-relaxation treatment. The woven fabric is used in a longitudinal direction, for example, when the conjugate yarn is used as a weft, the weft of the woven fabric is used. It can be obtained by shrinking the woven fabric in the direction by 15 to 50%, preferably 15 to 35%, with respect to the original length of the woven fabric. If the shrinkage ratio due to the heat relaxation treatment is less than 15%, sufficient elongation cannot be obtained, and if the shrinkage ratio exceeds 50%, it is necessary to increase the width or length of the woven fabric at the time of weaving, which is economical. Disadvantageous. Heat relaxation treatment is preferably 110
The treatment is performed under a moist heat of up to 130 ° C., and this treatment may be performed in an independent step, or may be performed in a step such as high-temperature dyeing.

By the heat-relaxation treatment, the conjugate filament yarn in the warp or the weft or the composite yarn existing as the warp and the weft, due to heat, in addition to the viscosity difference between the joining components, particularly one of the joining components is a copolymerized polyester. In some cases, a crimp develops in each filament based on the copolyester exhibiting high shrinkage, and the crimp substantially shrinks in the longitudinal direction of the yarn to form a core portion. The filament forms a sheath, and in addition to the stretchability based on the crimped structure of the conjugate filament yarn of the core, the filament yarn of the sheath bulges due to the bulkiness effect of the crimped structure of the core. Give the fabric a rich texture.

In the fabric of the present invention, various effects can be obtained by other filament yarns combined with the conjugate filament yarns. When the other filament yarn to be composited is an extensible polyester filament yarn having a boiling water shrinkage of -3 to 0%, the core-sheath structure is conspicuous, and a more bulging texture without snagging can be obtained by cationic dyeing. In the case of a polyester filament yarn, a different color mixing effect by a combination of a disperse dye and a cationic dye is given to the fabric.

When the other filament yarn to be composited is a thick and thin polyester filament yarn having a thick portion having a birefringence Δn of 30 to 80 × 10 ⁻³ , the dyeing density effect is reduced by titanium oxide. In the case of a polyester filament yarn containing 1 to 3% by weight, a dry feeling due to elution of titanium oxide in weight reduction processing applied to polyester fabric is obtained, and a birefringence of a thick portion containing 1 to 3% by weight of titanium oxide is obtained. When the rate Δn is a thick and thin polyester filament yarn of 30 to 80 × 10 ⁻³ ,
The dyeing shade effect and the dry feeling are given to the fabric, respectively.

[0025]

The present invention will be described below in more detail with reference to examples. The intrinsic viscosity was measured at 25 ° C. with a Ubbelohde viscometer using a mixed solvent of phenol / tetrachloroethane (weight ratio: 50/50). The number of loops in the fluid treatment was 0.15 m from the yarn surface using a photoelectric fluff measuring device.
The loops protruding m or more were defined as loops, and the number per 1 m of yarn length was measured.

Example 1 The intrinsic viscosity at the time of spinning was 0.50
Polyethylene terephthalate of No. 4 and 1.0 mol% of 5-sodium sulfoisophthalic acid and 12 mol% of adipic acid
And a copolymerized polyester having an intrinsic viscosity of 0.622 at the time of spinning obtained by copolymerizing polyethylene glycol with polyethylene terephthalate as a bonding component. The tip following the part has a taper angle of 15
゜ was spun from a discharge hole having a conically wide open shape in a conical shape and spun to obtain a conjugate filament yarn of 100 denier / 24 filaments having a bonding ratio (weight) of 50/50. The conjugate filament yarn obtained had a stretch recovery ratio of 15.8% in a twisted state (1000 times / m),
The rate of crimp development and elongation was 0.9%.

The conjugate filament yarn and 1
20 denier / 72 filament spontaneously extensible polyethylene terephthalate filament yarn (boiling water shrinkage (BW
S) -1%) was subjected to Taslan processing with a loop number of 296 / m to form a composite, and then twisted at 1200 times / m with a double twister twisting machine.

The obtained composite yarn was used for warp and weft, and woven into a warp double woven fabric. The fabric is heated and relaxed at 120 ° C. for 20 minutes using a high-pressure jet dyeing machine, an intermediate set at 190 ° C. for 60 seconds, a weight loss rate of 20% at 95 ° C. for 80 minutes, and an alkali weight loss processing and high pressure. Dyeing with a disperse dye was performed sequentially at 130 ° C. for 40 minutes using a liquid jet dyeing machine. The shrinkage rate (the original length of the greige machine) in the heat relaxation treatment of the woven fabric was 20% in the warp direction and 27% in the weft direction.

The obtained woven fabric has an elongation of 15% in the warp direction,
The elongation recovery rate was 14% in the weft direction, the elongation recovery rate was 95% or more in the weft direction, and the dry heat shrinkage rate was 1% in both the weft direction. Also,
The obtained woven fabric has a conjugate filament yarn in the composite yarn that contracts in the longitudinal direction by heat-relaxation treatment, and a core portion,
The spontaneously extensible polyethylene terephthalate filament yarn forms a sheath, has a soft and swelling texture, and the garment made of this woven fabric has a smooth stretch property and a comfortable feeling of wearing.

(Comparative Example 1) In Example 1, a 75 denier / 18 filament high shrinkable polyester filament yarn (BWS 20%) consisting of a copolymerized polyester obtained by copolymerizing 8 mol% of isophthalic acid with polyethylene terephthalate was used. ) Was performed in the same manner as in Example 1 except that the composite yarn was subjected to Taslan processing, twisted, and woven using the obtained composite yarn as a warp and a weft. For this woven fabric, as in Example 1,
Heat relaxation treatment, intermediate setting, alkali weight reduction processing and dyeing processing were performed. The shrinkage in the heat relaxation treatment was 24% in the warp direction and 28% in the weft direction.

The obtained woven fabric had an elongation rate of 2% in both the weft and elongation directions, an elongation recovery rate of 95% in the weft direction, a dry heat shrinkage of 1% in both the elongation and the weft direction. In addition, the resulting fabric has a soft, bulging texture with the heat-relaxation treatment, where the high-shrinkage polyester filament yarn in the composite yarn forms the core and the spontaneously extensible polyethylene terephthalate filament yarn forms the sheath. However, the fabric was hardly stretched under a low load, and the garment made of this woven fabric did not have smooth stretchability and had a poor feeling of wearing.

(Example 2) The same two kinds of polymers as used in Example 1 were used as bonding components, and the melt flows of the respective components were merged symmetrically at the upstream part of the spinneret, and the composite flow was connected to the tip following the pores. The portion is discharged from a discharge hole having a conical divergent opening at a taper angle of 15 ° and spun, and the joining ratio (weight) is 50/5.
A conjugate filament yarn of 50 denier / 12 filaments was obtained. In the twisted yarn (1414 turns / m), the elasticity of the obtained conjugate filament yarn was 16%, and the crimp onset / elongation ratio was 0.8%. This conjugate filament yarn and 110 denier / 72
Filament thick and thin polyethylene terephthalate filament yarn (thick portion birefringence Δn60 × 1
0 ^-3 , thin portion ratio 15%, BWS 2%)
The composite was formed by performing interlace processing at a rate of pcs / m and then twisting at 1600 times / m with a double twister twisting machine.

The obtained composite yarn was used for warp and weft and woven into a twill fabric. Example 1 for this fabric
In the same manner as in the above, a heat relaxation treatment, an intermediate setting, an alkali weight reduction processing and a dyeing processing were performed. The shrinkage of the woven fabric in the heat relaxation treatment was 17% in the warp direction and 28% in the weft direction.

The obtained fabric has an elongation of 12% in the warp direction,
The elongation recovery rate was 11% in the weft direction, the elongation recovery rate was 90% or more in the weft direction, and the dry heat shrinkage rate was 2% in both the weft direction and the weft direction. Also,
The obtained woven fabric was excellent in design effect with a dark streak pattern based on a light color.

Example 3 The conjugate filament yarn of 50 denier / 12 filament obtained in Example 2, 2.3 mol% of 5-sodium sulfoisophthalic acid and 5 mol% of adipic acid were copolymerized with polyethylene terephthalate. 75 denier of copolyester /
A 24 filament cationic dye-dyeable polyester filament yarn is interlaced at 50 entangles / m to form a composite, which is then mixed with a double twister twisting machine.
Twisting was performed 600 times / m, and the obtained composite yarn was woven using a warp and a weft.

Under the same conditions as in Example 1, the woven fabric was subjected to a heat-relaxation treatment, an intermediate setting, an alkali weight reduction treatment, and a dyeing treatment with a cationic dye. The dyeing with the cationic dye was performed at the boiling temperature. The shrinkage of the woven fabric in the heat relaxation treatment was 30% in the warp direction and 40% in the weft direction.

The obtained woven fabric has an elongation of 15% in the warp direction,
The elongation recovery rate was 20% in the weft direction, the elongation recovery rate was 90% or more in the weft direction, and the dry heat shrinkage rate was 2% in both the weft direction and the weft direction. Also,
The obtained woven fabric was excellent in the design effect with a melange-like surface feeling of a different color mixture.

Example 4 The conjugate filament yarn of 100 denier / 24 filaments obtained in Example 1 and polyethylene terephthalate containing 2% by weight of titanium oxide have an elongation of 80%, a BWS of 14% and a U% Is 1
% Of 100 denier / 36 filament thick and thin polyethylene terephthalate filament yarn is subjected to interlacing to give an interlacing number of 52 yarns / m to be composited, and then to 1,400 turns / m with a double twister twisting machine.
Twist.

The obtained composite yarn was used as a warp and a weft, and woven into a warp double weave fabric. Example 1 for this fabric
Under the same conditions as described above, heat relaxation treatment, intermediate setting, alkali weight reduction processing and dyeing processing with a disperse dye were performed.
The contraction rate of the fabric in the heat-relaxation process is 42% in the warp direction.
It was 45% in the weft direction.

The obtained woven fabric had an elongation rate of 20% in both the weft and elongation directions, an elongation recovery rate of 90% in the weft direction, a dry heat shrinkage of 2% in both the elongation and the weft direction. In addition, the obtained woven fabric was soft and had a swelling feeling, a dry feeling, and a light and light slab pattern with excellent design effect.

Example 5 Intrinsic viscosity at the time of spinning differs 2
Bonding ratio (weight) of 5 kinds of polyethylene terephthalate
The composite spinning was performed at 0/50 to obtain a conjugate filament yarn of 100 denier / 24 filaments. Twisted conjugate filament yarn (1000 times /
In the m) state, the elasticity recovery ratio was 15.8%, and the crimp expression elongation ratio was 0.9%. This conjugate filament yarn and 120 denier / 24 filament spontaneously extensible polyethylene terephthalate filament yarn (BWS-1)
%) To give a composite yarn by performing an interlacing process at 50 entanglements / m to obtain a composite dye dyeable with a disperse dye. Next, the composite yarn was twisted at 1200 times / m with a double twister twisting machine.

On the other hand, two types of 5 having different intrinsic viscosities at the time of spinning.
-Composite spinning of a copolymer dye obtained by copolymerizing 2.2 mol% of sodium sulfoisophthalic acid with polyethylene terephthalate at a joining ratio (weight) of 50/50 to give a cationic dye-dyeable conjugate filament yarn of 100 denier / 24 filaments. Obtained. Twisted yarn of the obtained cationic dye-dyeable conjugate filament yarn (1000
Times / m), the elasticity recovery ratio was 17.0%, and the crimp expression elongation ratio was 1.1%. This conjugate filament yarn and a 120 denier / 48 filament spontaneously extensible polyethylene terephthalate filament yarn (BWS-1%) made of a copolymerized polyester obtained by copolymerizing 2.2 mol% of 5-sodium sulfoisophthalic acid with polyethylene terephthalate were used. Then, an interlacing process was performed so that the number of entanglements became 50 / m to form a composite, thereby obtaining a composite dye dyeable with a cationic dye. Next, the composite yarn was twisted at 1200 times / m with a double twister twisting machine.

A woven fabric having a lattice pattern was woven using the above-described composite yarn capable of dyeing a disperse dye and the composite yarn capable of dyeing a cationic dye described later. Under the same conditions as in Example 1, the fabric was subjected to heat relaxation treatment, intermediate setting, alkali weight reduction processing, and dyeing processing with a cationic dye and a disperse dye. The obtained woven fabric has an elongation ratio of 9% in the warp direction, 15% in the weft direction, an elongation recovery rate of 90% or more in the weft direction, a dry heat shrinkage rate of
It was 3% or less in both the weft directions. Also, the obtained fabric is
It was soft and swelling with a dry sensation, and was excellent in design effect with a pattern that could be dyed with a disperse dye and a cationic dye.

[0044]

The stretchable polyester fabric of the present invention has a swelling texture, has a firmness and waist, and exhibits a smooth and comfortable stretch property when worn as clothing. When the conjugate filament yarn in the component yarn has a deeply dyed or differently dyed portion, a deeper design effect is added, and it is suitable as a fabric for clothing requiring soft and stretchability.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasuo Takada 4-160 Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Laboratory

Claims (18)

[Claims] 1. A conjugate filament yarn in which two kinds of polyester polymers having different viscosities are joined, wherein the single fiber fineness is 4 denier or more and 10,000 / D ^1/2.
(D: denier) The conjugate filament yarn having a stretch recovery ratio of 7% or more and a crimp development / elongation ratio of 0.2% or more and another filament yarn having a confounding number of 20 to 1 is used.
00 / m or the number of loops is 200 to 500 / m to form a confounding or loop and to form a composite, and the twist coefficient A (A = T ·
D ^1/2 , T: Number of twisted yarns (twice / m), D: denier) is 80
The woven fabric is composed of a composite yarn having a twist of 00 to 23000, and the elongation rate in the longitudinal direction of the composite yarn is 5 to 3
Stretchable polyester fabric characterized by having an elongation recovery of 85% or more and a dry heat shrinkage of 5% or less. 2. A conjugate filament yarn comprising a low-viscosity polymer of polyethylene terephthalate or a high-viscosity polymer of polyethylene terephthalate or a copolymerized polyester mainly composed of ethylene terephthalate units obtained by copolymerizing 5 to 15 mol% of a third component. The stretchable polyester fabric according to claim 1, which is a conjugate filament yarn to which the polyester polymer is bonded. 3. The stretchable polyester according to claim 2, wherein the copolymerized polyester is an ethylene terephthalate unit-based copolymerized polyester obtained by copolymerizing isophthalic acid, adipic acid, or 5-sodium sulfoisophthalic acid alone or in combination as a third component. Polyester fabric. 4. The conjugate filament yarn,
The stretchable polyester fabric according to claim 1, which is a conjugate filament yarn in which two kinds of cationic dye dyeable polyester polymers having different viscosities are joined. 5. The stretchable polyester according to claim 1, 2 or 3, wherein the other filament yarn is an extensible polyester filament yarn having a boiling water shrinkage of -3 to 0%. fabric. 6. The stretchable polyester fabric according to claim 1, wherein the other filament yarn is a cationic dyeable polyester filament yarn. 7. The filament yarn according to claim 1, wherein the other filament yarn is a thick and thin polyester filament yarn having a thick portion having a birefringence Δn of 30 to 80 × 10 ^−3. Item 5. An elastic polyester fabric according to item 4. 8. The stretchable polyester fabric according to claim 1, wherein the other filament yarn is a polyester filament yarn containing 1.5 to 3% by weight of titanium oxide. . 9. A filament containing 1.5 to 3% by weight of titanium oxide having a birefringence .DELTA.n of 30%.
The stretchable polyester fabric according to claim 1, 2, 3, or 4 which is a thick and thin polyester filament yarn of up to 80 x ^10-3 . 10. A conjugate filament yarn in which two kinds of polyester polymers having different viscosities are joined, wherein the single fiber fineness is at least 4 denier and 10,000 / D ^1/2.
A conjugate filament yarn having a stretch recovery ratio of 7% or more and a crimp development / elongation ratio of 0.2% or more in a twist yarn of (D: denier) is entangled with another filament yarn in the number of 20 to 1
00 / m or the number of loops is 200-500 / m.
^1/2 , T: number of twists (twice / m), D: denier) 800
After weaving into a woven fabric using a composite yarn having a twist of 0 to 23000, the heat-relaxation treatment is applied to the woven fabric, and the shrinkage ratio to the original fabric length in the longitudinal direction of the used composite yarn is 15 to
A method for producing a stretchable polyester fabric, wherein the fabric is contracted by 50%. 11. Two types of conjugate filament yarns, wherein polyethylene terephthalate is a low-viscosity polymer, and polyethylene terephthalate or a copolymerized polyester mainly composed of ethylene terephthalate units obtained by copolymerizing a third component with 5 to 15 mol% is a high-viscosity polymer. The method for producing a stretchable polyester fabric according to claim 10, wherein a conjugate filament yarn to which the polyester polymer is bonded is used. 12. The stretch polyester according to claim 11, wherein the copolyester is an ethylene terephthalate unit-based copolyester obtained by copolymerizing isophthalic acid, adipic acid, or 5-sodium sulfoisophthalic acid alone or in combination as a third component. Method for producing conductive polyester fabric. 13. A conjugate filament yarn joined to a cationic dye-dyeable copolyester polymer mainly composed of ethylene terephthalate units obtained by copolymerizing two kinds of 5-sodium sulfoisophthalic acids having different viscosities as a conjugate filament yarn. Claim 1 using Article
0. The method for producing a stretchable polyester fabric according to item 0. 14. The stretchable polyester according to claim 10, 11 or 12, wherein an extensible polyester filament having a boiling water shrinkage of -3 to 0% is used as another filament. Fabrication method. 15. The method for producing a stretchable polyester woven fabric according to claim 10, wherein a cationic dyeable polyester filament yarn is used as another filament yarn. 16. A thick and thin polyester filament yarn having a thick portion having a birefringence Δn of 30 to 80 × 10 ^{−3 as} another filament yarn.
The method for producing a stretchable polyester woven fabric according to any one of claims 0, 11, 12, and 13. 17. The stretchable polyester fabric according to claim 10, wherein a polyester filament yarn containing 1.5 to 3% by weight of titanium oxide is used as another filament yarn. Manufacturing method. 18. A thick and thin polyester filament yarn having a birefringence Δn of 30 to 80 × 10 ^{−3 in} a thick portion containing 1.5 to 3% by weight of titanium oxide as another filament yarn. 10. The method for producing a stretchable polyester fabric according to claim 11, claim 11, or claim 12.