KR20080104698A - A textured yarn - Google Patents

Abstract

Textured yarn is provided to reveal lightness and to have an excellent elasticity and an excellent washing durability by containing a hollow fiber. Textured yarn comprises potential crimped yarn and hollow fiber. The potential crimped yarn and the hollow fiber are made of two thermoplastic polymers of which heat shrinkages are different each other and are bridged. The potential crimped yarn comprises polyesters of which inherent viscosities are different each other. The polyesters of which inherent viscosities are different each other are polyethylene terephthalate and polytrimethylene terephthalate. The hollow fiber is the polyester yarn of which a total fineness is 30~300 denier. The mono denier of the hollow fiber is 0.5~4 denier.

Description

A textured yarn

The present invention relates to a processed yarn.

Recently, as outdoor activities increase due to the improvement of living standards, the consumption of clothes required for outdoor activities is increasing. In particular, for outdoor activities, the demand for elastic materials that can relax the body is increasing, and the demand for light materials for the convenience is increasing.

Spandex is a representative example of elastic materials. Spandex is excellent in elasticity, but cannot be used by itself, and is used by covering synthetic fibers such as polyester or polyamide or natural fibers such as cotton or wool. However, in the case of spandex, not only the elasticity decreases due to heat during dyeing and processing in fabric manufacturing but also the fastness to washing due to dye transfer after dyeing due to disperse dye dyeing when combined with polyester fiber. There are disadvantages.

As a conventional method of manufacturing the fabric showing the stretch is a method using a stretchable twisted yarn disclosed in Korea Patent Publication 1994-0015000. However, when the elastic twisted yarn is used, there is a limitation in elasticity due to the elastic limit of the twisted yarn, and there is a drawback in that the fabric is sagging when worn several times due to poor elongation recovery rate.

As another conventional technology, Korean Patent Laid-Open Publication No. 1998-0009557 proposes a method of simultaneously producing two types of polymers by spinning a polymer into a mold capable of forming a hollow to express elasticity and lightness. . However, since the hollow ratio is low around 10%, there is a disadvantage that sufficient light weight is not secured when the actual fabric is applied.

In addition, Korean Patent Laid-Open Publication No. 2003-0040287 proposes a long-fiber-short fiber composite yarn having latent crimped yarn and short fiber spun yarn with a sheath-core, but not only is it difficult to bundle short fibers, but also a twisting process It has a tricky disadvantage.

The present invention overcomes the problem of product coverage due to reduced elasticity at high temperature, which is a problem of the existing spandex covering company, and a decrease in the fastness due to dyeing, as well as the introduction of a latent crimping yarn as well as a combination of the latent crimping yarn and hollow fiber. It is to provide a processed yarn that can express the light weight when applying the fabric.

The present invention is to provide a process yarn that is excellent in elasticity and washing fastness and light weight because the potential crimping yarn and hollow yarns are entangled with each other so as to solve these problems.

Hereinafter, the present invention will be described in detail.

The processed yarn of the present invention is characterized by (i) a latent crimp yarn composed of two kinds of thermoplastic polymers having different heat shrinkage properties, and (ii) a hollow fiber, wherein the latent crimp yarn and the hollow fiber are entangled with each other.

The latent crimping yarn may be composed of two kinds of polyesters having different intrinsic viscosities, or may be composed of polyethylene terephthalate and polytrimethylene terephthalate.

The latent crimping yarn is manufactured by a conventional composite spinning method, and the two types of thermoplastic polymers are preferably bonded in a side by side form on a yarn cross section.

Next, the hollow yarn has a hollow ratio of 20% or more. If the porosity is less than 20%, the light weight effect of the processed yarn is reduced. As the hollow fiber, a polyester yarn having a single fineness of 0.5 to 4 deniers and a total fineness of 30 to 300 deniers is used.

The hollow yarn may be hollow fiber manufactured by directly spinning with a spinneret for hollow fibers, and the fiber-forming component and the eluting component are spun into a composite spinning mold to produce a two-component composite fiber, and then eluted to constitute the two-component composite fiber. It may also be hollow fiber produced by eluting the component.

The latent crimp yarn and hollow yarn are preferably entangled in a ratio of 1: 9 to 9: 1 by weight.

The processing yarn of the present invention is manufactured by a method of interlacing the latent winding house and the hollow fiber described above by air-texturing or interlacing. In order to give uniform entanglement and suppress the generation of knitting, the air pressure during the entanglement treatment is appropriately set depending on the type of yarn, but preferably it is adjusted to 1 to 5 kg / cm 2.

If the air pressure is less than 1kg / ㎠ low air pressure may cause the problem that the potential crimps and hollow yarns are not entangled, if the air pressure is more than 5kg / ㎠ not only the air is uneven, but also one of the potential winding houses and hollow fiber There is a disadvantage in that the yarns form loops to form streakys in the manufacture of knitted fabrics and thus the appearance is poor. In general, the proper air pressure is 2-3 kg / cm 2.

The fabrics thus prepared are woven or woven using yarns, and the woven dough is heat-set after normal refining, shrinking, and dyeing processing to produce a final fabric having excellent elasticity, color fastness, and light weight.

The processed yarn produced according to the present invention has elasticity and at the same time contains hollow fiber, which has the effect of expressing lightness. In addition, the final product manufactured by weaving and knitting with this processing yarn does not use spandex, so it has elasticity and excellent washing fastness.

Various physical properties and measuring method for the woven fabric of the present invention is as follows.

* Hollow rate

The hollow ratio of the hollow yarn is represented by the following equation after the yarn cross-sectional photograph.

Hollow ratio = area of hollow part / total area of yarn × 100 (%)

* Stretch rate and recovery rate of fabric

The elongation and recovery rate of the fabric is measured by the static load method of KS K 0352.

* Color fastness to laundry

Wash fastness of fabric is measured by A-1 method of KS K 0430.

* Fabric thickness and weight

The fabric thickness is measured using a Peacock Co., Ltd. model G, and the weight is measured by the weight of the fabric per yard.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example  One

Side-by-side latent crimping yarn consisting of polyethylene terephthalate and polytrimethylene terephthalate, using 1 strand of 75 denier 24 filaments and 1 strand of 70 denier 34 filament yarn having a 30% hollow ratio composed of polyethylene terephthalate. A 145 denier stretchable lightweight yarn was produced by entanglement with air pressure of kg / cm 2.

The weaving yarn manufactured as above is a weft yarn, and the ramp is a 2/2 twill weave on a rapier loom using polyester denier yarn of 150 denier, followed by refining / shrink, heat setting (P-set), dyeing, heat setting ( D-processing was performed in the process of F-set) to prepare a fabric.

At this time, the elasticity, wash fastness and weight of the fabric produced using the processed yarn are shown in Table 2.

Example  2 ~ 3

A fabric was manufactured in the same manner as in Example 1, except that the configuration of the processed yarn used as the weft yarn was changed as shown in Table 1.

At this time, the elasticity, wash fastness and weight of the fabric produced using the processed yarn are shown in Table 2.

Example  4

Side-by-side latent crimp yarn composed of polyethylene terephthalate and polytrimethylene terephthalate 75 denier 24 filaments 1 strand of yarn and polyethylene terephthalate and alkali-soluble polyester 100 with a hollow ratio of 40% after alkali elution Using a denier 36 filament yarn 1 strand was entangled with an air pressure of 3.5 kg / ㎠ to prepare a flexible lightweight processed yarn of 145 denier.

The weaving yarn manufactured as above is a weft yarn, and the ramp is a 2/2 twill weave on a rapier loom using polyester denier yarn of 150 denier, followed by refining / shrink, weight loss, heat setting (P-set), dyeing, heat Fabric was prepared by the dyeing process in the process of fixed (F-set).

At this time, the elasticity, wash fastness and weight of the fabric produced using the processed yarn are shown in Table 2.

Comparative Example  One

The fabric was manufactured by the same process as in Example 1, except that the spandex 70 denier yarn was covered with a polyethylene terephthalate and covered with one strand of 70 denier 34 filament yarn having a hollow ratio of 30%. .

At this time, the elasticity, wash fastness and weight of the fabric produced using the processed yarn are shown in Table 2.

Comparative Example  2 ~ 3

A fabric was manufactured in the same manner as in Example 1, except that the configuration of the processed yarn used as the weft yarn was changed as shown in Table 1.

At this time, the elasticity, wash fastness and weight of the fabric manufactured using the processed yarn are shown in Table 2.

Manufacture conditions division Latent stall Hollow fiber dead species Hollow Ratio of Hollow Fiber (%) Example 1 75/24 latent barn 70/34 hollow fiber 30 Example 2 75/24 latent barn 70/68 Hollow Fiber 20 Example 3 60/24 Latent Remarks 70/34 hollow fiber 30 Example 4 75/24 latent barn 100/36 Elution Type Hollow Fiber 40 Comparative Example 1 70/6 spandex 70/34 hollow fiber 30 Comparative Example 2 75/24 latent barn 100/36 General History 0 Comparative Example 3 75/36 High Stretch Speaker 70/34 hollow fiber 30

Property evaluation result of fabric division elasticity Color fastness Thickness (0.01 × 10mm) Fabric weight (g / yd) Elongation (%) Elongation recovery rate (%) Example 1 30 96 Grade 4 55 250 Example 2 29 94 Grade 4 52 270 Example 3 31 94 Grade 4 48 240 Example 4 28 95 Grade 4 60 245 Comparative Example 1 35 91 2nd class 70 345 Comparative Example 2 30 95 Grade 4 64 320 Comparative Example 3 20 75 Grade 4 58 275

The present invention is excellent in elasticity and color fastness and is useful as a yarn for clothing.

Claims (9)

A process yarn comprising (i) a latent crimping yarn composed of two kinds of thermoplastic polymers different from each other in heat shrinkage, and (ii) hollow fiber, wherein the latent crimping yarn and the hollow fiber are entangled with each other. The process yarn according to claim 1, wherein the latent crimping yarn is composed of two kinds of polyesters having different intrinsic viscosities. The process yarn according to claim 1, wherein the latent crimping yarn is composed of polyethylene terephthalate and polytrimethylene terephthalate. The processed yarn according to claim 1, wherein the hollow yarn is a polyester yarn having a total fineness of 30 to 300 denier. The single yarn fineness of the hollow fiber is 0.5-4 denier, The processed yarn of Claim 1 or 4 characterized by the above-mentioned. The processed yarn according to claim 1, wherein the hollow yarn is prepared by eluting the eluting component of the two-component composite fiber composed of the fiber-forming component and the eluting component. The process yarn according to claim 1, wherein the two types of thermoplastic polymers having different thermal shrinkage properties are bonded to each other in a side by side form on a yarn cross section. The finished yarn according to claim 1, wherein the hollow yarn has a hollow ratio of 20% or more. The processed yarn according to claim 1, wherein the weight ratio of latent crimped yarn and hollow fiber is 1: 9 to 9: 1.