Poly(vinyl chloride) fiber for artificial hair, method and apparatus for producing the same

Abstract

A poly(vinyl chloride) fiber for artificial hair which is produced by a method comprising spinning a poly(vinyl chloride) based resin composition by using a nozzle (10) having a ratio L / D of the length (L) of the land of the nozzle hole (2) to the diameter (D) of the nozzle hole (2) of 1 to 3, a thickness of its introduction portion (1) of 4 mm or more and an angle of the final introduction in the nozzle introduction portion (2) to the nozzle hole (2) of 20 DEG to 90 DEG , with a discharge amount of per unit nozzle hole of 65 to 165 g / h, and which has an arithmetic mean roughness (Ra) according to JIS B 0601 in the longitudinal direction of 0.18 to 0.38 mum, and has a maximum height (Ry) according to JIS B 0601 in the longitudinal direction of 0.5 to 3.5 mum.

Description

technical field [0001] The present invention relates to artificial hair having luster, color and feel similar to human hair, used in the manufacture of hair decoration products such as wigs, hairpieces, braids, and extension hairs. Polyvinyl chloride fiber for hair, its manufacturing method and its manufacturing device. Background technique [0002] Synthetic fibers conventionally used as artificial hair fibers for hair include synthetic fibers such as polyester fibers, acrylic fibers, and polyvinyl chloride fibers. In particular, polyvinyl chloride fibers are difficult to obtain due to their strength, elongation, transparency, and curl. Since it has excellent retention properties, it is widely used as fibers for artificial hair for hair. However, synthetic fibers formed by the usual melt spinning method have a smooth surface, so they have a strong luster, and in terms of touch, they are far from the natural feel of natural hair because of the strong slippery feeling unique...

AI Technical Summary

Problems solved by technology

However, synthetic fibers formed by the usual melt-spinning method have a smooth surface, so they have a strong luster, and in terms of touch, they are far from the natural feel of natural hair because of the strong slippery feeling unique to plastics.

[0003] Therefore, in order to solve such a problem, a polyester-based fiber containing organic particles such as silica-based inorganic particles and cross-linked polystyrene in the polyester-based fiber and having a convex portion of a specific shape on the surface has been proposed. technology (refer to Patent Document 1), although the polyester fiber can reduce the luster and slippery feeling to some extent, it still cannot obtain the luster, touch and natural feel like natural hair.

Moreover, although the technology described in this patent document 1 is applicable to the manufacture of polyvinyl chloride-based fibers, since the melt viscosity of polyvinyl chloride-based resins is high, the polyvinyl chloride-based resins contain silica-based inorganic particles, crosslinked When a resin composition of organic particles such as polystyrene is spun, fiber breakage occurs during spinning, so there is a problem that fiber formability decreases

[0004] On the other hand, in order to solve the above-mentioned problems, a technique of cooling the spun polyamide fibers to impart wrinkled unevenness to the surface of the polyamide fibers has been proposed (see Patent Document 2). Can make it less glossy and slippery, but still can't achieve the luster, touch and natural feel of natural hair

Moreover, although the technology described in this patent document 2 is applicable to the manufacture of polyvinyl chloride-based fibers, since the surface unevenness of the obtained polyvinyl chloride-based fibers is small, there is still a problem that the luster, touch and natural feel like natural hair cannot be obtained. The problem

[0005] In addition, there has also been proposed a single fiber for a wig, which appropriately mixes and contains: a single fiber (A) having an even number of protrusions in the radial direction in cross-section, and an odd number of protrusions in the radial direction in cross-section. A single fiber (B), two or three single fibers with an approximately circular cross-section are adjacently formed, and three of the single fibers (C) connected with a width approximately equal to the radius of the single fiber at the joint between adjacent single fibers According to the cross-sectional shape or mixing ratio of the fiber, the single fiber for wig still has the problem of not being able to obtain the luster, touch and natural feel like natural hair.

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