KR19990076031A - Microfiber warp knitted fabric manufacturing method. - Google Patents

Abstract

The present invention relates to a method for producing a microfiber warp knitted fabric.

In the present invention, by using a composite fiber composed of a fiber-forming component and a soluble component as a surface yarn and a high shrink yarn as a back yarn, the knitted knitted paper is alkali treated, shrunk, brushed, and dyed to prepare microfiber warp knitted paper. Thermal shrinkage (100 ° C x 15 minutes) with a backside yarn using a fiber-forming component as a surface yarn, polytrimethylene terephthalate, a soluble component as a copolyester, and a single fiber fineness of 0.01 to 0.5 denier after elution component elution. It is characterized by using a highly shrinkable polytrimethylene terephthalate yarn having 12) to 18% and a dry heat shrinkage (185 占 폚 x 2 minutes) of 18 to 28%.

Description

Microfiber warp knitted fabric manufacturing method.

The present invention relates to a method for producing a microfiber warp knitted fabric having a fine brushed density, excellent light effect, excellent dyeing, and excellent stretch characteristics.

Microfiber warp knitted paper is mainly used for artificial leather and women's clothing. Conventional techniques for producing microfiber warp knitted fabrics include warp knits using split microfibers composed mainly of nylon and polyester as surface yarns and backing yarns, and high shrink yarns as inner yarns. A method of raising the brush on both sides has been used. Since this method uses split type microfine fibers as surface yarns and backside yarns, there is a limit to fineness of yarns compared to extractable (island type) microfine fibers. As a result, satisfactory surface feel and light effect effects could not be obtained. In addition, since the split type microfiber is composed of polyester and nylon having different dyeing properties, it is difficult to obtain a uniform color during dyeing and is difficult to print. In addition, due to the polyester component constituting the split microfiber, there is a problem that can not be dyed at atmospheric pressure.

Meanwhile, in order to solve the above problems, the island component is polyester and the sea component is an island-soluble copolyester of an island-in-the-sea composite fiber used as a surface yarn, and a high-shrinkable yarn is used as a back yarn to assemble a warp knitted fabric, which is then subjected to alkali treatment, Shrinkage, brushing, and dyeing have been used to produce microfiber warp knits.

In this method, the finer fibers can be finer than the method of using the split type microfine fibers as the surface yarn and the backside yarn, thereby improving the surface feel and the effect effect. In addition, since the sea component and the island component are both polyester, the problem of dyeing unevenness can be solved. However, in the above method, when the sea component is eluted with an aqueous alkali solution, the island component is removed from the alkali, and the physical properties such as strength are lowered. Due to the low elastic recovery rate of the polyester, the rebound property of the warp knitted fabric is lowered, and high temperature dyeing is required. There is a problem that the dyeing cost increases.

Therefore, an object of the present invention is to produce a microfiber warp knitted fabric that can solve the problems of the prior art.

The present invention has a fine brushed density, excellent light effect effect, can be dyed at atmospheric pressure, excellent alkali resistance, no physical property deterioration due to withdrawal of seaweed components when dissolution of sea component, very fine fiber warp knitted fabric with excellent stretch characteristics To provide a method of manufacturing.

The present invention relates to a method for producing microfiber warp knitted fabric having excellent dyeing property and elasticity.

More specifically, the present invention uses a composite fiber composed of a fiber-forming component and a soluble component as a surface yarn and a high shrink yarn as a backside yarn to prepare a microfiber warp knit, wherein the fiber-forming component is a polytrimethylene terephthalate as a surface yarn. Of the ultra-fine fiber warp knitted fabric, characterized in that a composite fiber having a co-polyester having a co-polyester and a single yarn fineness after elution of the co-usable component is used, and a highly shrinkable polytrimethylene terephthalate yarn is used as the back side yarn. It relates to a manufacturing method.

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

First, the present invention uses a composite fiber having a fiber-forming component of polytrimethylene terephthalate and a usable component of copolyester as a surface yarn, and using a highly shrinkable polytrimethylene terephthalate yarn as a back yarn to warp the tricot tissue. Relate it.

In the present invention, the composite fiber used as the surface yarn during the knitting is a composite spinning of alkaline water-soluble copolyester as a usable component and polytrimethylene terephthalate as a fiber forming component as a detention apparatus for a conventional islands-in-sea type or split type composite fiber. It is then prepared by stretching. It is preferable to use up to 20 to 60% by weight of the releasing component during composite spinning, and to 80 to 40% by weight of the fiber forming component, but the weight ratio thereof is not particularly limited. In addition, at least six or more fiber-forming components are arranged separately in the cross section of each filament constituting the composite fiber and are continuous in the longitudinal direction of the fiber axis. Is 0.01-0.5 denier. If the single yarn fineness is more than 0.5 denier, the surface feel and the light effect are deteriorated. If the single yarn fineness is less than 0.01 denier, the spin processability is deteriorated.

The copolyester used as a usable component in the preparation of the composite fiber of the present invention is copolymerized with isophthalic acid or 5-sodium sulfoisophthalic acid in polyethylene terephthalate and has excellent alkali solubility.

In the present invention, the heat shrinkage rate (100 ° C. × 15 minutes) of the highly shrinkable polytrimethylene terephthalate yarn used as the backside yarn during the knitting is 12-18%, and the dry heat shrinkage rate (185 ° C. × 2 minutes) is 18-28%. When the heat shrinkage rate and the dry heat shrinkage rate are lower than the above ranges, the density of the hairs is lowered, and when the heat shrinkage rate and the dry heat shrinkage rate are higher than the above ranges, the manufacturing process becomes difficult. Next, the warp knitted fabric as described above is refined at about 95 ° C. in a refining refiner and eluted with seawater in the warp knitted paper in a caustic soda solution. Subsequently, heat treatment is performed at 160 ° C. pin tenter, followed by brushing. After dyeing the brushed warp knitted paper is finished in order to make the hair evenly to prepare a microfiber warp knitted fabric of the present invention.

In the present invention, the polymethylene terephthalate used as the fiber forming component of the surface yarn and the backside yarn is prepared by condensation polymerization of terephthalic acid or dimethyl terephthalate and 1,3-propanediol and has a structural formula as shown in Formula (I).

Polytrimethylene terephthalate is made of polyethylene terephthalate (PET)

Styrene terephthalate (PBT) It has an intermediate carbon number, has excellent elastic recovery rate of polyamide level, and has excellent alkali resistance, excellent elasticity, low temperature dyeing and dyeing fastness.

In particular, alkali resistance is more than twice that of polyethylene terephthalate. As a result, the ultrafine fiber warp knitted fabric produced by the method of the present invention is an alkaline aqueous solution, and the loss of surface components and back yarns of the surface yarns are generated in the sea component elution step, so that there is no deterioration in the properties of the warp knit and the fabric is excellent.

In addition, the ultrafine fiber warp knitted fabric prepared by the method of the present invention has good hair compactness and excellent elasticity in the direction of the warp yarn due to the excellent elasticity and rebound elasticity of the polymethylene terephthalate. In addition, dyeing can be performed at normal pressure, thereby reducing excessive energy waste generated during conventional high-pressure dyeing.

In the present invention, the touch and the area shrinkage were evaluated by the following method.

Surface feel

Measured by Kawada Sea system.

Area shrinkage (%)

Measure the unit area (A) of the sheet dough and the unit area (B) of the warp knitted paper heat-shrink treated, and substitute the following formula.

Area shrinkage (%) = × 100

Through the following examples will be described in more detail the present invention. However, these examples are merely provided to more easily understand the present invention, the present invention is not limited to these examples.

Example 1

Polytrimethylene terephthalate with an intrinsic viscosity of 0.88, measured in a 30 ° C solution with methylene chloride and trifluoroacetic acid at 50:50, was used as a fiber-forming component, which was then used in a island-based extruder with a temperature of 260 ° C. Melt.

On the other hand, an alkali-soluble copolyester is used as the elution component and is melted in a sea component extruder having a temperature of 285 ° C. When the fiber-forming component (polytrimethylene terephthalate) and the usable-release component (alkali-soluble copolyester) melted in an extruder, respectively, had a temperature ratio of 285 ° C. and a number of fiber-forming components 36 at a weight ratio of 50:50. After supplying to the spinneret for the type composite fiber, the composite spinning is carried out to prepare island-in-the-sea composite fiber having 130 denier 36 filament yarn having a single yarn fineness of 0.05 denier after elution of the usable component. The composite fiber prepared as described above was used as a surface yarn, and a high shrinkage polytrimethylene terephthalate 40 denier / 24 filament yarn having a heat shrinkage rate of 15% and a dry heat shrinkage rate of 25% was used as a backside yarn, and these were cut into tricot tissue. Prepare a light letter with a unit weight of 280 g / m 2. The warp knitted paper was refined at 95 ° C. in an expanded refiner, eluted with soluble components in caustic soda hot water at a concentration of 28 g / l for 15 minutes, and then heat-treated in a 160 ° C. pin tenter and brushed with a brush. Then, after finishing the dyeing and finishing set, the finishing process for uniformly selecting the hairs in the brushing machine is performed to prepare microfiber warp knitted paper. Dyeing was performed at 95 ° C. for 60 minutes using a disperse dye. The results of measuring the physical properties of the manufactured microfiber warp knitted fabric are shown in Table 2.

Example 2

A microfiber warp knitted fabric was prepared under the same conditions and processes as in Example 1 except that the single yarn fineness after the elution component eluted was changed to 0.2 denier. The results of measuring the physical properties of the manufactured microfiber warp knitted fabric are shown in Table 2.

Example 3

The same fiber-forming component and the usable-release component as in Example 1 were supplied to a spinneret for extracting composite fibers having a temperature of 285 ° C. and the number of fiber-forming components of eight at a weight ratio of 65:35, followed by complex spinning to obtain a usable component. Extractive composite fiber of 130 denier 36 filaments having a single fineness of 0.3 denier after elution is produced. Thus prepared fine fibers warp knitted by the same process and conditions as in Example 1, and then dyed. The results of measuring the physical properties of the manufactured ultrafine fiber warp knitted fabric are shown in Table 2.

Comparative Example 1 to Comparative Example 2

Except for changing the manufacturing conditions as shown in Table 1 to produce a microfiber warp knitted fabric under the same conditions and processes as in Example 1. The results of measuring the physical properties of the manufactured microfiber warp knitted fabric are shown in Table 2.

<Table 1> Article

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Surface yarn type Island Island Extraction type Island Island Fiber forming component PTT PTT PTT PET PET Releasing component Copolymer PET Copolymer PET Copolymerized PET Copolymer PET Copolymer PET Elution component elution posterior thread fineness 0.05 0.2 0.3 0.1 0.1 The cotton doctor High Shrinkage PTT High Shrinkage PTT High Shrinkage PTT Highly shrinkable PET General PET Dyeing condition Temperature (℃) 90 90 130 130 130 Minutes 60 60 60 60 60

In Table 1, PTT is polytrimethylene terephthalate and PET is polyethylene terephthalate.

<Table 2> Evaluation Results of Microfiber Warp Knot Properties

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Surface smoothness ◎ ◎ ◎ ○ ○ Drape Castle ◎ ○ ○ ○ ○ elasticity ◎ ◎ ◎ △ △ Dissolution Processability ◎ ◎ ◎ ○ ○ Compression Recovery Characteristics ○ ○ ○ △ △ Area shrinkage (%) 60 60 60 60 46

(Double-circle) is good, (circle) is excellent, (triangle | delta) is a normal and x represents a defect.

Microfiber warp knitted fabric of the present invention is capable of dyeing disperse dyes at room temperature, excellent dyeing uniformity and color fastness. In addition, the density of brushing is high, the light effect is excellent, and the alkali resistance is excellent, so there is no deterioration of physical properties when dissolution of sea component. In addition, the ultrafine fiber warp knitted fabric of the present invention is excellent in elasticity and resilience characteristics.

Claims (3)

In the production of microfiber warp knits using a composite fiber composed of a fiber-forming component and a soluble component as a surface yarn and a high shrink yarn as a backside yarn, the fiber-forming component as a surface yarn is polytrimethylene terephthalate and A method for producing an ultrafine fiber warp knitted fabric characterized by using a composite fiber having co-polyester and having a single yarn fineness of 0.01 to 0.5 denier after elution of the usable component, and using a highly shrinkable polytrimethylene terephthalate yarn as a back side yarn. The ultrafine fiber according to claim 1, wherein the heat shrinkage rate of the highly shrinkable polytrimethylene terephthalate yarn (100 占 폚 x 15 minutes) is 12 to 18%, and the dry heat shrinkage rate (185 占 폚 x 2 minutes) is 18 to 28%. Method for preparing warp knitted paper. The method of claim 1, wherein the copolyester is polyethylene terephthalate copolymerized with isophthalic acid or 5-sodium sulfoisophthalic acid.