KR950001003B1 - Manufacturing method for artificial swede - Google Patents

Abstract

(A) a tricot is made from knitting complex fiber of polyester/polyamide and filament yarn; (B) after raising, complex fiber of tricot surface is made into a superfine structure and complex fiber in a tricot is treated by a solution consisting of 0.1-3 wt.% of sodium hydroxide and 0.5-5 wt.% of benzyl alcohol; (C) after dying, tricot is dipped in a polyurethane solution containing 0.3-3 wt.% of polysiloxane analogue as a softening agent and solidified and abrased by a buffing machine.

Description

Manufacturing method of artificial suede with excellent flexibility.

1 to 3 are cross-sectional enlarged views of split microfiber yarns applicable to the present invention, wherein A represents polyamide, B represents polyester,

4 is a tricot organization chart applicable to the present invention.

The present invention relates to a method of manufacturing artificial suede (SUEDE), which is soft to the touch and excellent in surface effect, and more specifically, by using a polyester / polyamide composite fiber and a general polyester filament yarn which can be micronized to 0.1 denier or less A method of manufacturing artificial suede, which is made of brushed tricot paper and brushed and chemically treated to minimize the composite fiber of the inner layer of the tricot and fills a polyurethane elastomer containing a softening agent so that the texture and surface effect similar to that of natural suede are expressed. It is about.

Conventional artificial suede is made of nonwoven fabrics or woven fabrics using regular synthetic fibers of single yarn fineness of 1 to 3 denier without using ultrafine fibers, and is then incorporated into a polyurethane resin solution. It was prepared by coagulation after buffing, but unlike the natural suede of the artificial suede, it was hard to feel and lacked the writing effect of the surface, and thus was not suitable as a high-quality artificial suede fabric.

In Japanese Patent Laid-Open Nos. 51-73103, 52-2804 and 52-12903, a knitted fabric is manufactured using split microfiber, and then brushed and treated with benzyl alcohol. By making it fine and combining it with polyurethane resin. Although the artificial suede was manufactured by buffing after coagulation, the artificial suede obtained by this method has a good lighting effect but lacks flexibility and drape, and it is difficult to handle due to the use of a large amount of solvent in the manufacturing process. If it is seriously raised, and washing with water is not sufficient, there is a disadvantage in that the dyeing trouble (Tentering) by the residual solvent decreases the touch due to crystallization, odor, etc. occurs. On the other hand, Korean Patent Publication No. 91-8220 tried to solve the above problem by omitting the dividing process by solvent treatment and mechanical dividing treatment by acupuncture mosquito, but the composite fiber of the tricot surface is sufficiently divided by the abrasion brushing On the other hand, the composite fiber of the inner layer could not be divided by the non-penetration of the needles, there was a drawback of the lack of flexibility and drape of the final product.

Accordingly, it is an object of the present invention to provide a method that can easily produce an artificial suede having a soft touch and excellent surface effect.

In order to achieve the above object, in the present invention, the first step of recombining the tricoat using a composite fiber and a regular polyester filament yarn that can be ultra-fine, raising the microfiber of the composite fiber on the surface of the tricoat, and for sodium hydroxide and polyester The second step in which the carrier is immersed in the mixed aqueous solution to make the composite fiber of the inner layer of the tricot extremely fine, after dyeing, is combined with the polyurethane resin solution containing the softening agent. By combining the third step of solidifying and buffing in sequence, an artificial suede having excellent flexibility and drape property, almost no surface dropout, no visible tissue lines, and excellent lighting effect could be manufactured.

The present invention is described in more detail as follows.

The composite fiber used in the present invention is a multi-segment composite fiber composed of a fiber-forming polyamide and a fiber-forming polyester, and the fiber-forming polyimide resin as the first component is shown in FIGS. 1 to 3. As described above, the branched radially is formed at the center of the cross section of the composite fiber to form a radial portion of four directions or more and eight directions or less, and the fibrous forming polyester resin, the second component, is alternately arranged with the first component between the first component to form a wedge portion. It is formed to have a degree of fineness of 0.1 denier by performing mechanical and chemical splitting process.

In order to prevent deterioration in efficiency, strength charge, and the like, which are generated when only the composite fiber is sewn, 1 to 3 denier regular polyester filament yarns are used together, and the back bar is divided into two bars. Three bar tissues are cut into a middle bar using regular polyester filament yarns, respectively. The tricot paper thus chopped is brushed so that the composite fiber on the surface is sufficiently divided using a cloth brush.

Subsequently, it is immersed in a mixed aqueous solution of sodium hydroxide and a carrier for polyester and refined for several minutes at a boiling temperature. The purpose of refining and splitting is to remove the spinning and milling oil, and to improve the flexibility by dividing the composite fiber in the inner layer of the raising paper, and to evenly divide the finely divided composite fiber on the surface to make the final product uniform. .

In the case of treatment with a single solution of sodium hydroxide in the refining fractionation treatment, at high concentrations where the composite fibers in the inner layer of the brushed paper can be divided, the microfibers on the surface divided by the brushing have a high rate of loss, resulting in the dropping of the surface wool. At low concentrations such that microfibers are not reduced, the inner composite fibers are not split.

In case of treatment with an aqueous solution of Kaer alone, the refining effect is not sufficient, waste water problems occur, and there is a disadvantage in that it is not economical. Therefore, it is good to use a combination of the two components as appropriate. It is preferable that the concentration of sodium hydroxide should be 0.1 to 3% by weight during the longitudinal splitting treatment. In case of less than 0.1% by weight, the refining and splitting effect is not sufficient, and in the case of 3% by weight or more, the refining splitting effect is sufficient, but the loss of surface microfiber is remarkably caused, resulting in severe fallout of cows and a significant decrease in strength. Benzyl alcohol, o-phenyl phenol, phenol, nitrobenzene, m-cresol, benzoic acid, benzyl alcohol, Aniline, benzylamine and 2-phenoxyethanol can be used.But considering the safety, workability and price, benzyl alcohol is recommended and the concentration is 0.5 to 5 weight. % Is preferred. If the amount is less than 0.5% by weight, the swelling of the polyester has an inadequate disintegration effect, and if the amount is more than 5% by weight, the swelling is excessive, resulting in a rapid increase in alkali reduction rate and a large amount of wastewater after treatment.

Then, after dyeing the brushed paper to a desired color using a method commonly used in the technical field to which the present invention belongs, it is impregnated with a polyurethane resin solution containing a softening agent and solidified in water at room temperature and then 50 to 70 ° C. Wash in water. The polyurethane resin solution is a polyurethane solvent solution in which a polyol, a diisocyanate compound, and a chain extender are copolymerized. That is, the polyol includes a polyether polyol and a polyester polyol as a compound having a molecular weight of about 500 to 2000 having a hydroxyl group at the sock end.

The polyether polyols include polyoxyethylene glycol, polyoxypropylene glycol, polytetramethylene glycol, and the like, and copolymers thereof may also be used.

Polyester polyols include polyethylene adipate glycol, polyethylene propylene dk diate glycol, polyethylene propylene adipate glycol, polytrimethylene adipate glycol, and polytrimethylene adipate glycol Tetramethylene adipate glycol, Polypentamethylene adipate glycol, Polyhexamethylene adipate glycol, Poly-caprolactone polyol, etc. are mentioned. As the diisocyanate compound, organic compounds having two isocyanate groups are 2,4 or 2,6-toluene diisocyanate, 4,4-diphenylmethane diisocyanate, meta or paraphenylene diisocyanate ( m or p-phenylene diisocyanate meta or para-xylene diisocyanate, 1,5-naphthalene diisocyanate, tetra methylene diisocyanate, 1,6-hexamethylene Hexa methylene diisocyanate and the like. As the chain tableting agent, a low molecular weight compound having two active hydrogens, ethylene glycol and butylene glycol are glycols, hydrazine, ethylene diamine and 1,2-propylene. Diamines such as propylene diamine and m-toluene diamine, and amino alcohols. The amount of electric polyurethane used is preferably such that the resin solid content is attached to 3 to 30% by weight of the fiber.

Softeners contained in the polyurethane resin solution include econcon compounds such as dimethyl polysiloxane, methyl phenyl polysiloxane, methylchloropenyl polysiloxane, methylhydrogen polysiloxane, and the like. In particular, the use of an amino-modified silicone compound in which dimethylpolysiloxane is substituted with an amino group allows excellent compatibility with polyurethane and enables uniform distribution. The added silicone compound not only improves the flexibility of the final product, but also improves the buffing properties due to the release of polyurethane and fibers during buffing and reduces the dropping of cows. The amount of addition is preferably 0.3 to 3% by weight based on the total complex.

Then, after drying the polyurethane impregnated fabric, the surface is polished with a buffing paper wound with 200 to 400 mesh sand paper to obtain an artificial suede.

Synthetic suede manufactured by the above-mentioned method is sufficiently divided into composite fiber groups in the inner and outer layers, so it is excellent in draping flexibility and there is almost no falling out of the surface wool, so there is no visible texture line and the lighting effect is excellent. It can be applied to sofa, seat cover, and sundries.

The following examples and comparative examples further illustrate the present invention, but do not limit the scope of the present invention.

Example 1

Melt spinning at a volume ratio of 1: 3 using nylon 6 with a relative viscosity of 2.6 in 25 ° C and 96% sulfuric acid as component A and polyethylene terephthalate with an intrinsic viscosity of 0.64 as measured in 25 ° C orthochlorophenol It was wound at a speed of 1,500 m / min to obtain an undrawn yarn having the same cross-sectional shape as the third degree.

The wire was twisted three times at 130 ° C. and heat-fixed with a hot plate at 150 ° C. to obtain a split composite microfiber of 50-day 36 filaments. This composite yarn is used as a front and back yarn, and a 50-day 24 filament commutated polyester fiber is used as a middle yarn to squeeze the tricot into the same texture as that of the fourth degree, Each brush was raised 10 times each.

Subsequently, the mixture was immersed in a mixed aqueous solution of 1% by weight of sodium hydroxide and 1% by weight of benzyl alcohol, and then treated at 100 ° C. for 20 minutes, and the treated fabric was dried under high pressure by a conventional method and dried as described below. Soak it in the mixed solution and squeeze it with Mangle to attach 15% by weight of solids, soak it in a 25 ℃ water bath and solidify it for 10 minutes, and then wash it in a 60 ℃ water bath for 10 minutes for complete extraction of the solvent and dry it at 140 ℃ hot air. After quenching, both surfaces were buffed with 300 mesh sandpattern to obtain the artificial suede of the present invention.

[Polyurethane Resin Mixture]

● 100 parts by weight of polyurethane resin (Nihon Ink Chemical, CRISVON 8006HV) (30 parts by weight of solid content)

● 3 parts by weight of silicone compound (Shinwol Chemical, KF864)

● 200 parts by weight of DMF (N, N-Dimethyl formamide)

The thickness of the manufactured suede was measured by KS K 0506 method, weight by KS K 0514 method, tear strength by KS K 0535 (pendulum method), drape coefficient by JIS L 1096 flexibility test method, and apparent density Calculated by weight / thickness, the lighting effect was evaluated by 10 competent sensory researchers and the results are shown in Table 1.

Comparative Example 1

A synthetic suede was prepared in the same manner as in Example 1 except that the mixed aqueous solution of sodium hydroxide and benzyl alcohol was not immersed, and then the physical properties and characteristics were evaluated in the same manner as in Example 1, and the results are shown in Table 1 below. It is described in.

Comparative Example 2

Synthetic suede was prepared in the same manner as in Example 1, except that the silicone compound was not added to the polyurethane resin mixture, and the physical properties and properties were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Example 3

The artificial suede was prepared in the same manner as in Example 1 except that the front and white yarns were made of regular polyester fibers of 50 denier 24 filaments, and the physical properties and properties were evaluated in the same manner as in Example 1, and the results are shown in Table 1. Described.

TABLE 1

Note 1) KS K 0506, 2) KS K 0514, 3) Apparent Density (g / cm 3) = 4) KS K 0535, 5) Sensory evaluation, 6) JIS L 1096 Flexibility test method.

Claims (3)

The first step of squeezing tricoats using polyester / polyamide composite fibers and regular filament yarns that can be made extremely fine, brushing the composite fibers on the surface of the tricots, and mixing aqueous solution of sodium hydroxide with a carrier for polyester The second step of making the composite fiber of the tricoat inner layer fine by immersion in immersion, impregnated into a polyurethane resin solution containing a softening agent after dyeing. A method of manufacturing a flexible suede with excellent flexibility, characterized by comprising a third step of solidifying and buffing. The method of claim 1, wherein the mixed aqueous solution of sodium hydroxide and the carrier for polyester is characterized in that the sodium hydroxide concentration is 0.1 to 3% by weight, the polyester carrier is benzyl alcohol and the concentration is 0.5 to 5% by weight. Excellent manufacturing method of artificial suede. The method of producing a synthetic suede having excellent flexibility according to claim 1, wherein the softening agent is a polysiloxane compound and the content is 0.3 to 3% by weight based on the total solid content after polyurethane impregnation.