KR870001338B1 - Hygroscopic synthetic fiber's making method - Google Patents

Abstract

Hygroscopic synthetic fiber is produced. Thus, a compd. contg. polyethylene(MIF=16) and polystyrene (MIF=21) at the 9:1 ratio is spun at 283 C and at the rate of 1300 m/min. This resulting material is extended to get multifilamentous thread (75 denier, 24 filament), inflamed at 2750 tpm and heat-treated at 150≰C to give a synthetic fiber.

Description

Manufacturing method of hygroscopic synthetic fiber

According to the present invention, fibril-like pores are formed on the surface and inside of the hollow fiber in the longitudinal direction of the fiber, and fine fibrillary pores are formed in the network structure while communicating with the hollow part inside the fiber. It relates to a method for producing a hygroscopic soluble fiber.

1) Japanese Patent Publication No. 55-76106 discloses a method for preparing hollow fiber containing inert inorganic particles, and then removing metal inorganic particles by alkali reduction method, and 2) containing inert metal inorganic particles and containing ethylene tere Method for producing microporous fibers for alkali reduction of PET fibers having a phthalate group of 70 mol% or more, and 3) the pores of the crater and the inside of the fiber on the fiber surface by containing fine particles having a fear forming ability in the PET air-containing material. There are known methods for producing hollow yarns to form fear micropores in the.

However, the method of 1) of the above known method was the simplest method, but could not exhibit the function of the hygroscopic yarn, and this was merely a degree of giving hydrophilicity to the fiber by providing a separate hygroscopic processing on the fiber surface. The method of is slightly technically improved than the method of 1), but the physical function of the fiber is more weak.The method of 3) is not a fundamental hygroscopic yarn, and the hygroscopic effect is required only by graft polymerization of a monomer of a separate hydrophilic material. Not only is there an improvement in defects, but the physical properties of the fiber are so weak that there is a problem that cannot be used alone.

The present invention aims to solve the above-described drawbacks of the conventional hygroscopic fibers and to provide a high hygroscopic synthetic fiber having improved water absorption and water dissipation, high catch ratio, dryness and excellent heat retention.

It is another object of the present invention to provide a method for producing hygroscopic synthetic fiber which maintains the physical and mechanical properties peculiar to synthetic fiber with high hygroscopicity.

In the present invention, two kinds of thermoplastic resins having completely different solubility by solvent and some degree of compatibility are melted in separate injection molding machines and then supplied to the detention apparatus through different passages.

The two-component melted thermoplastic resin supplied to the detention apparatus is formed into a non-uniform two-component multi-core type while continuously passing through a distribution plate which alternately mixes-disperses-mixes the two components.

The two-component mixed melt thus formed is discharged through a hollow mold to prepare hollow fibers, then stretched and then extract and remove the soluble components in the two components with a solvent.

(A) Polyamide which can be formed into a fibrous form by a known melt spinning method while the solubility by a solvent is completely different, and one component is hydrophobic and has fiber formation ability among two kinds of thermoplastic resins with some compatibility. , Polyester crab, polyolefin-based and fluorinated polyolefin-based resin, and other components are polyolefin-based, fluorinated polyolefin-based, polyacetal-based and copolymerized vinyl- or polyester-based which have excellent solubility by solvent and have known melt spinning ability. In the present invention, polyester is used as the fiber-forming resin, and polystyrene, polyethylene, and copolymerized polyester resin are used as the dissolving component.

In other words, a polyester resin having an intrinsic viscosity of 0.65 measured at 30 ° C. and one of the above dissolved components in an equivalent mixture of phenol and tetracroethane are selected and melted in a separate injection molding machine, and fed to the detention apparatus.

B) The ratio of the fiber component dissolved in the detention apparatus to the dissolved component is very wide ranging from 99: 1-35: 65, but the ratio of dissolved component is less than 50% in consideration of the correlation between the physical properties and the absorbent performance of the fiber. It is preferable to set it as 10% or more.

The two kinds of components introduced into the detention apparatus are respectively positioned separately in the injection plate of the first stage and are supplied to the next focusing plate through the outlet hole at each position.

At this time, in the connecting plate, a component having a high component ratio, that is, a fiber component, becomes a sheath component, and a dissolving component having a low component ratio becomes a core component, thereby forming a multi-core bicomponent mixture solution. In order to discharge the two-component mixture thus formed immediately through detention or to obtain more fibrillated core components, the bicomponent mixture is sent to the injection plate again through a distribution plate, and then the number of fibril core components is increased in the focusing plate, and then the spinneret is discharged. You may discharge through. The number of fibrillated core components in the fiber section thus formed is about the same as the number of holes through which the core component in one unit of the primary jet plate exits the focus plate in the primary focusing plate, but the core formed in the secondary focusing plate. The number of components is multiplied by the number of holes in one unit of the secondary dispersion plate.

a×b^c(n : Core 성분갯수, a : 1차 집속판에서 형성되는 Core 성분의 수, b : 2차 분산판내의 한 유니트에 뚫어진 구멍수, C : 2차 이후 분산판 갯수)이 된다.Therefore, the number of Core components during dispersion-mixing-dispersion-mixing is n

a × b ^c (n: number of core components, a: number of core components formed in the primary focusing plate, b: number of holes drilled in one unit in the secondary dispersion plate, C: number of dispersion plates after the secondary) .

The two-component melt mixed on the Multi-Core is discharged through a specially designed hollow fiber manufacturing die.

C) The two-component composite fibers discharged from the detention can be stretched after manufacturing undrawn yarn at a winding speed of 1000-1500 m / min, or at the same time as a high orientation low crystalline undrawn yarn wound at a winding speed of 2,500-4,000 m / min. It can be processed and used as a filament yarn or a filament processed yarn, or a staple can be made by a known staple manufacturing technique, and then spun and used as a spun yarn.

When the yarn thus prepared is dissolved in a solvent of a soluble component to dissolve and remove the component, a highly hygroscopic synthetic fiber is formed, but it is more preferable to raise the dissolved component in a woven fabric in order to improve the operability in a subsequent process. Do.

D) It is preferable to perform the combustible processing in order to make the hygroscopic synthetic fiber to have a sublimeness and elasticity.The purpose of the combustible processing is the first purpose of granting the sublime property, so that the space between the sand and the sand is enlarged, so that the water can move smoothly, Increasing the contact area to improve the absorbency while increasing the air layer due to the bulkiness of the fabric to increase the insulation of the fabric.

In addition, the efficacy is increased as a desirable functional material by the increase in elasticity.

Because of the wide range of combustible processing conditions, in terms of absorption performance, the temperature of the dry heat heater is suitable for the temperature range above the temperature rise defect of the supplying fiber to the high temperature range where the thread is not fused or weakened. It is effective if it is 160 degreeC or more.

On the other hand, it is desirable to control the number of twists during the flamming process so that the number of trimmings is excessive and excessive double smoke does not occur.

E) The above hygroscopic processed yarns can be cut into single or double warp yarns, or fabrics using spun yarns, or can be fabricated by twisting or weaving processed yarns or spun yarns, or double weaving. Depending on the organization of the knit fabric, the catch rate changes. This can be considered as the change of the structure between the yarns according to the organization.

F) In the present invention, a solvent extraction method using a solvent is most suitable for dissolving dissolved components in the present invention, and a method of incorporating a knitted fabric into a solution of a solvent and heating the same, and a high pressure tank for more effective dissolution extraction. The solvent treatment in the inside, the ultrasonic treatment with a solution of the solvent, or a high-pressure spray as a nozzle is used.

In this case, the dissolution treatment may be said to be complete dissolution treatment if the weight loss is made by the weight ratio of the soluble components contained in the fiber.

G) The material of this hygroscopic fiber is dyed as needed, and the dyed processed product has excellent washing resistance, and has aesthetic color and permanent processing effect.

The hygroscopic fiber of the present invention is a hygroscopic fiber having excellent capillary function by connecting fibrillary pores and fine network pores formed at random in the fiber length direction to connect the fiber surface and the inner hollow part. That is, due to the dual porous of the fiber, the water adsorption capacity, air permeability, heat retention, and moisture permeability of the surface are increased, and the water adhered to the surface is absorbed and accumulated by the capillary phenomenon in the inner micropores of the fiber, Through the processing through the opposite side, the evaporation performance is exerted.

When the garments are sewn with a garment using woven or knitted cloth, the arrangement of the yarns is parallel or inclined in the direction of gravity when worn, and the absorbed and accumulated moisture or liquid moves underneath the garment when worn by gravity. The upper portion continues to absorb moisture adhering to the fiber surface continuously. In fact, in the practical aspect of the outer coat, capillary phenomenon and drainage action appear sequentially.

As such, the water or liquid moved to the bottom of each yarn forms water droplets at the ends of the yarns and is mechanically discharged. This is a natural liquid flow and is transported and evaporated to the fiber surface through the communication holes of the fibers.

In addition, in the case of use as a yarn, when after weaving after weaving, fibrillating the surface of the woolen yarn, the evaporation of the liquid is more effective.

When the hygroscopic fiber is properly woven and comfortable, and sewn as clothing, excellent wearing ability can be obtained in sports clothes, work clothes, underwear, pajamas, and the like.

In addition, it is suitable as a fascination material because of its excellent touch and color effect, and it is possible to permanently exhibit more developed absorbent performance if a separate hygroscopic processing is performed.

EXAMPLE

The fiber-forming component is a polyester having an intrinsic viscosity of 0.65 measured at 30 ° C. in the same amount mixture of phenol and tetracroethane, and the soluble component is a low viscosity polyethylene having MIF = 16 and copolymerized polystyrene having MIF = 21: 1: 1. The raw composite material was spun at a spinning temperature of 283 ° C and a winding speed of 1300 m / min using a hollow fiber manufacturing die.

At this time, the component ratio of the polyester and the composite material was 7: 3, the dissolved component in the fiber was 30%, and the connecting plate was used in two stages in the detention apparatus.

The undrawn yarn was drawn at a draw ratio of 3.0 times to prepare a multi-filament drawn yarn of 75 denier and 24 filaments, and then burned at 2750 tpm in an ARCT drawing machine, followed by heat treatment at 150 ° C. and winding while steaming.

After mixing 2 of the garnison, the forge prepared by 28g / g flat knitting machine was impregnated in the ultrasonic tank containing the benzene liquid, and then dissolved components were extracted for 40 minutes at room temperature.

The results of the examples are shown in the following table.

Comparative Example 1

The cotton card spun yarn 30'S single yarn was sectioned under the same conditions as in Example, and the forge was refined and the same physical properties as in Example were evaluated. The results are shown in the table.

Comparative Example 2

A hollow undrawn yarn was prepared at a spinning temperature of 290 ° C. and a winding speed of 1200 m / min using a polyester resin of IV = 0.63 containing 1% by weight of an inert inorganic salt, followed by drawing at a draw ratio of 2.9 times, and 75 denier 24 filaments. Filament was prepared.

In the same combustor as in Example, the burned yarn was comminuted in the same manner as in Example, after the combusted processed yarn was subjected to the same conditions as in Example, and the heat treatment temperature was increased to 190 ° C.

The weight loss rate was 25% and the results are shown in the table.

[table]

Claims (3)

Two-component composite spinning in which more than 50 parts of compatible and soluble fiber-forming thermoplastic resins and 50 parts or less of soluble thermoplastic resin that can be melt-spun are melted separately, and these two components are continuously embedded with two or more distribution plates. Hydration to dissolve and dissolve the soluble components by putting in a detention apparatus and dispersing and mixing several times to make a two-component mixed melt mixed in a multi-core phase and spun this into a spinneret for manufacturing hollow fiber to prepare a two-component composite hollow fiber Method of manufacturing synthetic fibers. The fiber-forming thermoplastic resin according to claim 1, wherein the fibrous thermoplastic resin is polyamide or polyester or polyolefin or fluorinated polyolefin, and the soluble thermoplastic resin is polyolefin or fluorinated polyolefin or polyacetal or copolymerized vinyl or polyester. The manufacturing method of the hygroscopic synthetic fiber which is resin. The method of manufacturing a hygroscopic soluble fiber according to claim 1, wherein the two-component composite spinning device is composed of a distribution plate, a dispersion plate, a focusing plate, and a mold with a hollow cross section.