KR19990065596A - Manufacturing method of polyester biaxial blended yarn - Google Patents

Abstract

The present invention relates to a method for producing a polyester biaxial blended yarn.

The present invention is composed of a polyester drawn yarn having a single yarn fineness of 0.8 denier or less, or a component and a fiber forming component, and the heat-shrinkage rate is obtained by heat-treating a composite yarn (effect yarn) having a single yarn fineness of 0.8 denier or less after elution of the used component at 170 ° C to 240 ° C. The low shrink yarn (2) having 3 to 5% is produced, and then air-interacted with the latent crimp yarn (3) prepared by complex spinning of the polyester polymer (A) and the highly shrinkable polyester copolymer polymer (B).

The polyester bishrink blended yarn of the present invention is used to make stretch fabrics for garments.

Description

Manufacturing method of polyester biaxial blended yarn

The present invention relates to a method for producing a polyester biaxially blended yarn having excellent elasticity, weaving and processability. Polyester bishrink blended yarn is mainly used to manufacture stretch fabrics for garments.

Such stretch fabrics for garments are made of highly shrinkable polyester yarns and bi-shrink blended yarns prepared by copolymerizing a spundex yarn with a microfiber yarn, isophthalic acid and derivatives thereof.

The following problem occurs when manufacturing a stretch fabric with a processing yarn covered with a spandex yarn with a microfiber.

First, due to the high elasticity of spantex, the elasticity on the processed paper is good, but when the weft is supplied by water pressure or pneumatic pressure in the water jet room or air jet room, the elasticity of the spandex causes the sticky to the fabric edge, resulting in commercialization. It is difficult.

Second, the price of spandex is expensive and uneconomical.

Third, the spandex yarn shows a sensitive change in tension, so it is difficult to weave when used as a slope.

Fourth, there is a concern that the quality of the fabric may deteriorate due to the color difference after dyeing because the dyeing of spandex and polyester microfiber, which is an effect yarn, differ in dyeing properties.

On the other hand, when manufacturing a stretch fabric using a high-shrink polyester yarn copolymerized with a third component, a large amount of the third component should be copolymerized to express high shrinkability. As a result, the manufacturing cost is increased, there is a problem that the physical properties of the yarn and the fabric is lowered.

Due to such a problem, a method of manufacturing an elastic fabric using biaxial blended yarn is currently widely used.

Conventional techniques for producing polyester biaxially blended yarns are prepared by interweaving polyester highly oriented undrawn yarns and ordinary polyester drawn yarns which are spontaneously elongated on processed paper, such as Japanese Patent Application Laid-Open No. 1985-81345, with air entanglement. The method is the most widely used.

This method causes the following problems.

First, polyester highly oriented unstretched yarn has a higher incidence of defective yarns from the yarn manufacturing stage than general stretch yarn, and there is a variation in yarn quality over time and unevenness of the drum during winding.

Second, polyester highly oriented unstretched yarns are more difficult to handle than normal stretched yarns during processing. It is frequently the case that the yarn is easily deformed due to a slight tension or heat treatment unevenness and thus appears as a serious defect on the final processed paper.

Third, the process passability is poor in the weaving and weaving preparation process.

Fourth, when dyeing, there is a high risk of color difference due to the difference in the dyeability of ordinary yarns and has a serious defect that degrades the product quality.

Therefore, there has been a demand for the development of polyester biaxial blended yarn having excellent stretchability and excellent weaving property and process passability without the use of polyester highly oriented non-twisted yarn which causes such various problems.

The present invention is to provide a method for producing a polyester biaxial blended yarn having excellent process passability in the weaving and dyeing process, and exhibits excellent elasticity and bulkiness on the fabric during fabric production.

1 is a process schematic diagram of the present invention.

2 is a cross-sectional view illustrating a latent crimp yarn used in the present invention.

※ Description of the major symbols in the drawings

1: Polyester drawn yarn or using component and fiber forming component

Composite yarn (effect company)

2: Low Conservation House 3: Potential Rolling House

4: hotplate 5: air entanglement nozzle

6: polyester biaxial blend fiber

7: feeding roller A: polyester polymer

B: Highly Shrinkable Polyester Copolymer

The present invention relates to a method for producing a polyester bi-shrink blended yarn which is excellent in weaving, process passability and elasticity, which is useful for producing stretch fabrics for garments.

More specifically, the present invention is composed of a polyester drawn yarn having a single yarn fineness of 0.8 denier or less or a composite component (fiber forming agent) having a single yarn fineness of 0.8 denier or less after the use component eluting. A low-strength yarn (2) having a dry heat shrinkage of 3 to 5% was prepared by heat treatment at 240 ° C., followed by a composite spinning of a polyester polymer (A) and a highly shrinkable polyester copolymer polymer (B). 3) and a method for producing a polyester biaxially blended yarn characterized by air-entry.

Hereinafter, the present invention will be described in more detail.

1 is a process schematic diagram of the present invention.

First, the present invention is composed of a polyester drawn yarn having a single yarn fineness of 0.8 denier or less, or a conjugated component and a fiber forming component, and a composite yarn having a single yarn fineness of 0.8 denier or less after use component dissolution is used as the effect yarn (1). The composite yarn is manufactured by composite spinning the used component and the fiber forming component. The dry heat shrinkage of the polyester drawn yarn or composite yarn used as the effect yarn (1) is generally about 13 to 18%.

The present invention produces a low shrinkage yarn by instant heat treatment of the effect yarn (1) at 170 ℃ to 240 ℃.

In this case, a downward contact hot plate 3 as shown in FIG. 1 may be used as the heat treatment mechanism. When the heat treatment temperature is lower than 170 ° C., the reduction in shrinkage of the effect yarn 1 is minimal, and when it exceeds 240 ° C., the effect yarn 1 may be fused to the hot plate 3 or the like.

The heat treatment is carried out instantaneously in a very short time. It is usually preferable to heat-treat for 0.1 second to 0.5 second. In the heat treatment, it is preferable to supply the effect yarn 1 to the heat treatment mechanism at a supercharge rate of -3% to 15% for the workability. By such heat treatment, the internal structure of the effect yarn (polyester stretched yarn or composite yarn) is changed. That is, the degree of orientation of the amorphous region is lowered, and the crystallization rate is also lowered to the level of 40% to 60%.

As a result, the dry heat shrinkage of the effect yarn, which is 13% to 18%, is lowered to 3% to 5% after heat treatment.

In the present invention, the yarn in which the effect yarn 1 is heat-treated by the above method and the dry heat shrinkage is reduced to 3% to 5% is referred to as a low shrink yarn (2). Next, the low shrinkage yarn (2) and the latent winding yarn (3) are used as effect yarns and screenings, respectively, and these are mixed with an air entanglement nozzle (5) to produce the polyester bishrink blended yarn of the present invention.

The present invention uses a latent winding house (3) having a difference in dry heat shrinkage ratio of the low shrinkage yarn (2) at least 8% when mixed. If the difference in dry heat shrinkage is less than 8%, the elasticity and bulkiness may decrease, which is not preferable. As the latent crimping yarn (3), a yarn produced by complex spinning of a polyester polymer (A) and a highly shrinkable polyester copolymer polymer (B) is used. Preferably, a yarn prepared by complex spinning in a side-by-side form as shown in FIG. 2 or in a form of a herbicidal shape in which one component is ubiquitous in the center of the cross section of another component is used.

It is preferable that the composition ratio (weight basis) of the polyester polymer (A) and the highly shrinkable polyester copolymer polymer (B) which comprise the said potential crimping yarn (3) is 25: 75-75: 25.

The highly shrinkable polyester copolymer polymer (B) constituting the latent crimp yarn (3) is 2,2-bis (4- (2-hydroxyethoxy) phenyl) propane, 1 with respect to all diol components during polyester polymerization. , 3-di (hydroxyethoxy) benzene, 1 ｛2 (2-hydroxyethoxy) ethoxy, 3 (2-hydroxyethoxy｝ benzene, 1,3-di ｛2 (2-hydroxye At least one compound selected from the group consisting of methoxy) ethoxy｝ benzene, 2,2-dimethyl-1,3propanediol and 1,3bis (beta-hydroethoxy) -2,2-dimethyl propane diol It is prepared by adding 3 to 10 mol% or 5 to 12 mol% of isophthalic acid or a derivative thereof based on the total acid component, and the fineness ratio of low shrinkage yarn (2) to latent winding yarn (3) is 1: 2 to 3 when mixing. : Adjusting to 1 is advantageous for stretch and bulky expression on the fabric.

The polyester bishrink blended yarn produced by the method described above has excellent passability in various processes and exhibits excellent elasticity and bulkyness on the fabric during fabric production.

Hereinafter, the present invention will be described through Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

A low-shrink yarn (2) having a dry heat shrinkage ratio of 4% was produced by supplying 100 denier / 192 filament polyester stretched yarn (15% dry heat shrinkage rate) to a contact heater at a supercharge rate of 1%, followed by heat treatment at 225 ° C for 0.2 seconds. do.

On the other hand, a highly shrinkable polyester copolymer polymer obtained by copolymerizing 4 mol% of a polyester polymer with 2,2-dimethyl-1,3 propanediol was spun into a side-by-side type to give 60 denier / 12 filament latent crimps (3) To prepare. At this time, the weight ratio of the general polyester polymer and the highly shrinkable polyester copolymer polymer constituting the latent crimping yarn is 50:50.

The low shrinkage yarn (2) and the latent winding yarn (3) manufactured as described above are air-interlinked to produce a polyester bishrink blended yarn.

The bi-shrink blended yarn is used as a warp yarn and 75 denier / 36 filament polyester twisted yarn is used as the weft yarn, and then the fabric is woven in a water jet room, and then processed in a conventional manner. Table 1 shows the results of evaluating the weavability, processability, elasticity and appearance.

Example 2

In Example 1, weaving and dyeing were carried out under the same conditions and processes as in Example 1, except that polyester bishrink blended yarn was used as the weft yarn and 75 denier / 36 filament polyester false twist yarn was used as the warp yarn. Table 1 shows the results of evaluating the weavability, processability, elasticity and appearance.

Example 3

In Example 1, weaving and dyeing were carried out under the same conditions and processes as in Example 1, except that polyester biaxially blended blend yarn was used as warp and weft yarns. Table 1 shows the results of evaluating the weavability, processability, elasticity and appearance.

Example 4

After supplying 130 denier / 48 filament polyester islands-in-the-sea composite yarn composed of 36 degrees of monofilament and forming microfibers of 0.5 denier or less after post-processing, it was supplied to the contact heater at a supercharge rate of 1% and then 0.2 at 180 ° C. A low heat shrinkage yarn 2 having a dry heat shrinkage rate of 3.5% was prepared by heat treatment for a second.

Meanwhile, 60 denier / 12 filament latent crimps (3) are prepared by complex spinning a highly shrinkable polyester copolymer polymer in which a general polyester polymer and 2,2-dimethyl-1,3 propanediol are 4 mol% copolymerized into a deep sheath type. . At this time, the weight ratio of the conventional polyester, the polymer constituting the latent crimp yarn, and the highly shrinkable polyester copolymer polymer is 60:40.

The low shrinkage yarn (2) and the latent winding yarn (3) manufactured as described above are air-interlinked to produce a polyester bishrink blended yarn.

The bi-shrink blended yarn is used as a warp yarn and 75 denier / 36 filament polyester twisted yarn is used as the weft yarn, and then the fabric is woven in a water jet room, and then processed in a conventional manner. Table 1 shows the results of evaluating the weavability, processability, elasticity and appearance.

Example 5

In Example 4, weaving and dyeing were carried out under the same conditions and processes as in Example 4, except that polyester bishrink blended yarn was used as the weft yarn and 75 denier / 36 filament polyester false twist yarn was used as the warp yarn. Table 1 shows the results of evaluating the weavability, processability, elasticity and appearance.

Example 6

In Example 4, weaving and dyeing were carried out under the same conditions and processes as in Example 4 except that the polyester biaxially blended yarn was used as warp and weft yarns. Table 1 shows the results of evaluating the weavability, processability, elasticity and appearance.

Comparative Example 1

Covering yarn made by covering spandex yarn with 100 denier / 192 filament polyester processed yarn is used as a warp yarn, and 75 denier / 36 filament polyester twisted yarn is used as weft yarn, and then weaved in a raffia loom. It is processed by the method. Table 1 shows the results of measuring the weaving property, workability, elasticity and appearance.

Comparative Example 2

After weaving in raffia loom using covering yarn manufactured by covering spandex yarn of screening yarn with polyester processing yarn of 100 denier / 192 filament as weft, and using 75 denier / 36 filament polyester twisted yarn as warp yarn It is processed by the method. Table 1 shows the results of measuring the weaving property, workability, elasticity and appearance.

Comparative Example 3

Covering yarns prepared by covering the spandex yarn of the screening yarn with a polyester processed yarn of 100 denier / 192 filaments are used as warp and weft yarns, and then are woven in a raffia loom, and then processed in a conventional manner. Table 1 shows the results of measuring the weaving property, workability, elasticity and appearance.

Table 1 Measurement results of process passability and physical properties

Weaving Preparation Fairness Weaving Machinability Radial stretch Upward elasticity Exterior Example 1 Good Good Good Good Bad Good Example 2 Good Good Good Bad Good Good Example 3 Good Good Good Good Good Good Example 4 Good Good Good Good Bad Good Example 5 Good Good Good Bad Good Good Example 6 Good Good Good Good Good Good Comparative Example 1 Bad Bad Bad Good Bad Bad Comparative Example 2 Good Bad Poor 1 Bad Good Bad Comparative Example 3 Bad usually usually Good Good Good

Examples 3 and 6 have excellent elasticity in all directions of the warp yarn, because the polyester biaxially blended yarn of the present invention is used as the warp and weft yarn when weaving, and the examples 1, 2, 4 and In the case of Example 5, since the polyester biaxially blended yarn of the present invention is used only in any of the warp or weft yarns during weaving, only the elasticity of the warp or weft direction in which the polyester biaxially blended yarn of the present invention is used is excellent.

Since the polyester bishrink blended yarn produced by the method of the present invention is composed of effect yarns and screening (latent winding yarn) having different shrinkage rates from each other, the fabric produced therein has good bulkiness and elasticity due to the appearance of coils during screening during salt processing. Done.

In addition, since the polyester bishrink blended yarn prepared by the method of the present invention has excellent process passability in the weaving and dyeing process, it is possible to easily prepare a stretchable fabric using the same.

Claims (3)

It consists of polyester stretched yarn with single yarn fineness of 0.8 denier or less, or used component and fiber-forming component, and heats the composite yarn (effect yarn) with single yarn fineness of 0.8 denier or less after heat treatment at 170 ℃ ~ 240 ℃ A low shrinkage yarn (2) having a shrinkage ratio of 3 to 5% was prepared, and then air-entangled with a latent winding yarn (3) prepared by complex spinning of a polyester polymer (A) and a highly shrinkable polyester copolymer polymer (B). Method for producing a polyester biaxial blend fiber, characterized in that. The method for producing a polyester bi-shrink blended yarn according to claim 1, wherein the difference in dry heat shrinkage between the low shrinkage yarn (2) and the latent winding yarn (3) is 8% or more. The method for producing a polyester bispun blended yarn according to claim 1, wherein the fineness ratio of the low shrinkage yarn (2) to the latent winding yarn (3) is 1: 2 to 3: 1 at the time of air entanglement.