JPH11323682A - Conjugated combined filament polyester yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conjugated combined filament polyester yarn giving a new silky cloth having high bulkiness, excellent crispness, stiffness and springiness (cushioning property), dry touch and subdued surface luster by the usual alkali-thinning and dyeing of a cloth woven or knit with the yarn. SOLUTION: The conjugated combined filament yarn is composed of two or more polyester multifilament yarns entangled with each other. At least one of the yarn A constituting the combined filament yarn has thermal shrinkability and at least one of the other yarns B is a thermally extensible multifilament having irregular or porous surface. The combined filament yarn is composed of 20-50 wt.% of the yarn A and 80-50 wt.% of the yarn B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester composite mixed yarn comprising a heat-shrinkable multifilament yarn and a heat extensible multifilament yarn.

[0002]

2. Description of the Related Art Different shrinkage mixed yarns are widely used to impart a swelling feeling and bulkiness to a woven or knitted fabric. However, ordinary different shrinkage mixed yarns using only low shrinkage components and heat shrinkable fibers are unlikely to exhibit a difference in shrinkage under the tissue constraint of the woven or knitted fabric, and are still insufficient in terms of bulkiness and the like. .

[0003] For this reason, as means for expressing the feeling of swelling of a fabric due to polyester filament yarn, various types of different shrinkage mixed yarns using a heat-extensible yarn as a low shrinkage component have been proposed. For example, JP-B-61-36099 and JP-A-2-293410 disclose, as a low-shrinkage component,
Use a filament that elongates when heated,
Different shrinkage blended yarns comprising a composite of this filament and a highly shrinkable filament have been proposed.

[0004] Cloths made of these different shrinkage blended yarns have a heat-shrinkable filament as a low-shrinkage component because heat-extensible yarns are elongated by dyeing and slacks and loops are formed on the surface of the fabric. Although softness and bulkiness can be obtained as compared with a fabric using different shrinkage mixed yarns using, the slimy feeling and shininess peculiar to the filament could not be eliminated.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and, when knitted and woven and subjected to ordinary alkali weight reduction and dyeing processing, is rich in bulkiness, firmness, waist, elasticity ( An object of the present invention is to provide a polyester composite mixed yarn which is excellent in cushioning property, and can obtain a new silky tone fabric having a dry touch feeling and a calm gloss.

[0006]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention relates to a composite mixed yarn in which two or more polyester multifilament yarns are entangled, wherein at least one yarn A constituting the mixed yarn has heat shrinkability, One yarn B is composed of a heat-extensible multifilament having an uneven surface or micropores on the surface, and 20 to 50% by weight of yarn A and 80 to 50% by weight of yarn B.
A gist of the present invention is a polyester composite mixed yarn characterized in that the yarn is constituted at a ratio of 50% by weight.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

[0008] The composite mixed yarn of the present invention comprises a multifilament yarn (heat-shrinkable yarn) A having a heat-shrinkable property and a heat-extensible multifilament (heat-extensible yarn) having a special filament surface. ) B, and each filament of the yarn A and the yarn B has a mixed and entangled form.

As the heat-shrinkable yarn A, a polyester thermoplastic fiber such as polyethylene terephthalate (PET) can be used. However, the heat-shrinkable yarn A does not firmly bundle the mixed fiber even if it is subjected to heat treatment in dyeing and finishing. The heat shrinkage rate of the heat shrinkable yarn A is preferably less than 5%. After weaving and weaving the composite mixed yarn, when subjected to a heat treatment in a process such as dyeing, a heat-shrinkable yarn A forms a core yarn and a heat-extensible yarn B forms a sheath yarn to form a core-sheath structure. The heat-shrinkable yarn A serving as the core yarn imparts firmness and stiffness to the fabric and maintains the morphological stability of the composite mixed yarn.
It is preferable that the single yarn fineness is 3d or more and the elongation is 40% or less.

Next, the heat-extensible yarn B constituting the composite mixed yarn of the present invention together with the heat-shrinkable yarn A has a hot water shrinkage of 10% or less in boiling water and a dry heat of 180 ° C. The hot water shrinkage and the dry heat shrinkage are not particularly limited as long as the polyester is a polyester multifilament yarn having a dry heat shrinkage of 0% or less. However, if the heat extensibility is too high, the woven or knitted fabric will have a feeling of fluttering.
-5%, and the dry heat shrinkage are preferably in the range of -2 to -10%.

The heat-extensible yarn B is preferably a yarn that elongates further when subjected to hot water treatment and then to dry heat treatment at a temperature of 180 ° C. Thus, when the woven or knitted fabric using the composite mixed yarn of the present invention is heat-treated, the difference in yarn length between the heat-shrinkable yarn A and the heat-extensible yarn B is increased, and the bulkiness and the swelling feeling are further improved. It will be. Here, as a method of further emphasizing the bulkiness and the feeling of swelling, a method of applying normal false twisting to the heat-extensible yarn B to apply crimp and torque may be considered. When twist crimping is applied, the heat extensibility decreases, which is not preferable.

Further, the heat-extensible yarn B has irregularities or micro-crater-like micropores on the surface of each filament constituting the yarn. The unevenness or micro-crater-like micropores may be provided in the state of the thread before knitting or weaving, or may be formed by knitting and weaving into a fabric and then by alkali reduction treatment or the like.

The heat-extensible yarn B forming the sheath portion of the composite mixed yarn of the present invention has the above-mentioned special shape, so that when the fiber surface is irradiated with light, it has an irregular surface shape. The light repeats irregular reflection, and has the effect of absorbing light inside the fiber and reducing the amount of reflected light to the outside, thereby providing a deep color tone effect and a calm glossiness. Furthermore, a dry touch silky feeling can be given by a special cross-sectional shape.

In the present invention, the uneven shape or the fine pore means a minute one in μm unit, and does not mean a simple cross-sectional shape of a modified cross-section yarn (a triangular cross section, a hexagonal cross section, or the like). The heat-extensible yarn B has a slightly lower orientation (birefringence: 70 × 10 ^{−3 to} 120 × 10 ³⁾ as compared with a normal drawn yarn.
^-3 ), it is easy to be easily deformed by heat treatment such as dyeing after the weaving and knitting process, and it is easy to exhibit a different shrinkage effect such as a loop or a slack on the cloth.

Furthermore, the heat-extensible yarn B once heat-fixed
In the form (1), the single filament has a special uneven shape as compared with a normal circular cross section and the like, the surface area of the fiber is large, the bending rigidity is high, and strong resilience is obtained. And the surface irregularities, voids due to loops, sagging, etc. are added and compounded, and the fabric is excellent in firmness, waist, elasticity (cushioning property)
Can be provided.

Next, as described above, the composite mixed yarn of the present invention has a form in which the heat-shrinkable yarn A and the heat-extensible yarn B are mixed and entangled. Here, the ratio of mixed fiber
It is necessary that the heat-shrinkable yarn A accounts for 20 to 50% by weight of the whole yarn. If the proportion is less than 20% by weight, the woven or knitted fabric is weak against tension in a subsequent step, ironing, tension applied upon winding up the package, and the like, and stable shape retention cannot be obtained. On the other hand, when the proportion exceeds 50% by weight, the dry feeling and the bulkiness are lost, the color depth and the calm glossiness are reduced, and the sliminess peculiar to the filament is increased.

The heat-extensible yarn B is 80% of the entire yarn.
It needs to account for ~ 50% by weight. If this ratio is less than 50% by weight, dry feeling and bulkiness are lost, and color depth and calm gloss cannot be obtained.
On the other hand, if this proportion exceeds 80% by weight, the shape retention of the composite mixed yarn deteriorates.

Next, the composite mixed fiber of the present invention will be described with reference to the drawings.

FIG. 1 is a model diagram showing a side view of the composite mixed yarn of the present invention, wherein a heat-shrinkable yarn A and a heat-extensible yarn B are shown.
Has a form in which the yarn A forms a core yarn, and a heat-extensible yarn B having a special unevenness is arranged on the outer periphery thereof. I have.

Next, FIG. 2 is a sectional view showing an example of a single filament of the heat-extensible yarn B. The shape of the unevenness or micropores of the single filament of the heat-extensible yarn B is as follows.
For example, as shown in the cross section of the filament shown in FIG. 2, convex portions and concave portions are alternately and substantially uniformly distributed on the surface, and the cross section of the convex portion has a rectangular or substantially trapezoidal shape. Here, the arrangement, distribution and shape of the uneven portions are not particularly limited.

As described above, the composite mixed yarn of the present invention is
The heat-extensible yarn B located in the outer layer has a special uneven shape (micro-slit shape) that imparts bulkiness and swelling to the yarn by moderate shrinkage effect of the core yarn and the sheath yarn. , Dry touch feeling and calm luster can be obtained. Specific mixing ratio of core yarn and sheath yarn. Furthermore, due to different shrinkage and synergistic effect from special form, etc., elasticity, waist, elasticity, etc. This has the effect that a new feeling can be obtained.

The method for producing the composite mixed fiber yarn of the present invention is not particularly limited. As a method for obtaining the heat extensible yarn B, for example, a polyester highly oriented undrawn yarn obtained by high-speed spinning is used. After stretching, there is a method of performing a relaxation heat treatment at a high overfeed rate or performing a relaxation heat treatment at a high overfeed rate without stretching. In addition, as a method of blending the heat-shrinkable yarn A and the heat-extensible yarn B, the heat-shrinkable yarn A and the heat-extensible yarn B are either aligned or a commercially available yarn is supplied at different supply speeds. It is possible to adopt a general method of supplying the liquid to an interlace nozzle or a Taslan nozzle and performing confounding by the action of a high-pressure fluid.

The hot water shrinkage and the dry heat shrinkage are measured as follows. (1) Hot water shrinkage: Measured according to JIS-L-1013 method. (2) Dry heat shrinkage: In the method for measuring hot water shrinkage, a dry heat oven was used instead of boiling water, and the temperature was 180 ° C.
Measure with

[0024]

Next, the present invention will be described in detail with reference to examples.

Example 1 PET was used as a hardly eluting component, PET was used as a readily eluting component, obtained by copolymerizing 2.5 mol% of 5-sodium sulfoisophthalic acid and 12 wt% of polyethylene glycol having an average molecular weight of 700. A spinneret designed to form a core-sheath structure yarn in which the cross-sectional shape is a gear shape as shown in Fig. 2 and coated with an alkali-eluting component with an alkali-eluting component, and a birefringence spun using a composite spinning device Rate (Δ
n) A highly oriented undrawn yarn 75d / 24f of 60 × 10 ^-3 is used as a supply yarn for a heat-extensible yarn, and a supply speed of 500 m
Per minute, at a non-contact heater temperature of 400 ° C. and an overfeed rate of 20%, to obtain a heat-extensible yarn B of 90 d / 24 f. The hot water shrinkage of the obtained heat extensible yarn B is −1.
The dry heat shrinkage is 2% and the dry heat shrinkage is -5.0%. The dry heat shrinkage of the yarn after hot water treatment and air drying is -6.0 based on the yarn length before hot water treatment. %Met.

Next, the heat-extensible yarn B obtained above,
The drawn PET yarn 50d / 12f obtained by a conventional method having a boiling water shrinkage of 3.5%, which is a heat-shrinkable yarn A, is aligned to obtain 500
Entangling treatment was performed at m / min to obtain a composite mixed yarn of 140d / 36f. The confounding treatment conditions at this time were using an interlace nozzle (type P212) manufactured by Heberline Co., Ltd.
The air pressure was 3.0 kg / cm ² and the overfeed rate was 1.8%.

The obtained composite mixed yarn was twisted at 1000 T / M for warp and weft, and the warp density was 110 yarns / 2.
Weaving a 2/2 twill fabric with 54 cm and a weft density of 80 yarns / 2.54 cm, subjected to normal alkali weight reduction and dyeing finishing, it is rich in bulkiness, firmness, waist, elasticity, and a dry touch feel. And a woven fabric excellent in silky surface feeling was obtained.

Example 2 As the supply yarn of the heat-extensible yarn B, the fineness was 150 d / 48.
f at room temperature under the same conditions as in Example 1 except that
A 1.1-fold stretching treatment is performed, and subsequently, a relaxation heat treatment is performed at a non-contact heater temperature of 500 ° C. and an overfeed rate of 25% to form a heat-extensible yarn B.
And 100% / 24f PET drawn yarn obtained by a conventional method with a boiling water shrinkage of 4.0%. Was. In addition, in the above-mentioned yarn processing, when the heat-extensible yarn B before the entanglement treatment was applied was solely collected, the hot water shrinkage ratio was-
The dry heat shrinkage is 1.0% and the dry heat shrinkage is −4.5%. 0.0%.

The obtained composite blended yarn was twisted at 500 T / M into a warp, and the ordinary PET drawn yarn 100d / 36f obtained by a conventional method was twisted at 1200 T / M into a weft. The warp density is 78 threads / 2.54 cm, the weft density is 83
Weaving 2/2 twill woven fabric of 2.54 cm, and normal weight loss and dyeing finish processing, it is rich in bulkiness, firmness, waist, elasticity, excellent in dry feeling and silky surface feeling A woven fabric was obtained.

The single filament constituting the heat-extensible yarn B extracted from the woven fabrics obtained in Examples 1 and 2 is as follows:
The easily eluted components were eluted by the alkali weight reduction, and had a gear-shaped cross section as shown in FIG.

Comparative Example 1 A mixed fabric was obtained in the same manner as in Example 1 except that the heat-extensible yarn B was changed to a multifilament yarn of a single component of PET having a round cross section, and a woven fabric was prototyped. Then, normal alkali weight reduction and dyeing finishing were performed. The obtained woven fabric had high bulkiness, softness and slimy feeling, no dry touch feeling, strong shininess on the woven fabric surface, and lacked firmness, waist and elasticity.

[0032]

According to the present invention, if the polyester composite mixed yarn of the present invention is knitted and woven and subjected to ordinary alkali weight reduction and dyeing processing, not only the bulkiness is good, but also the elasticity, waist and elasticity are excellent.
Further, it is possible to obtain a novel silky tone fabric having a dry touch feel and a calm gloss.

[Brief description of the drawings]

FIG. 1 is a model diagram showing a side view of one embodiment of a polyester composite mixed yarn of the present invention.

FIG. 2 is a cross-sectional view showing an example of a single filament constituting a heat-extensible yarn B.

[Explanation of symbols]

 A heat-shrinkable yarn B heat-extensible yarn

Claims (1)

[Claims] Claims: 1. A composite mixed yarn in which two or more polyester multifilament yarns are entangled, wherein at least one yarn A constituting the mixed yarn has heat shrinkability and at least one other yarn A The yarn B is made of a heat-extensible multifilament having an uneven surface or micropores on its surface, and the yarn A is composed of 20 to 50% by weight and the yarn B is composed of 80 to 50% by weight. Polyester composite fiber yarn characterized by having.