CN-116648159-B - Fiber for artificial hair and wig

Abstract

The invention aims to provide a fiber for artificial hair comprising polyamide, which has a shiny feel that is inhibited from gloss similar to natural hair, has excellent continuous antistatic property and has excellent heat setting property. The solution to the problem is to provide a fiber for artificial hair comprising a thermoplastic polyamide and a polymer antistatic agent having compatibility with the thermoplastic polyamide, wherein the polymer antistatic agent has a melting point equal to or lower than the melting point of the thermoplastic polyamide.

Inventors

• Gyousuke Sato
• MATSUMOTO SHIHO
• SUGAWARA FUMITAKA

Assignees

• 爱德兰丝株式会社

Dates

Publication Date

20260508

Application Date

20220228

Priority Date

20210301

Claims (11)

1. 1. A fiber for artificial hair comprising a thermoplastic polyamide and a polymer-type antistatic agent having compatibility with the thermoplastic polyamide, The polymer antistatic agent has a melting point which is less than or equal to the melting point of the thermoplastic polyamide, The thermoplastic polyamide has a melting point of 170-270 ℃, The polymer antistatic agent is selected from a condensate of polyamide having carboxyl groups at both ends and polyethylene glycol having an aromatic ring, and a block copolymer having a polyethylene oxide block and a polyolefin block, The artificial hair fiber further comprises a thermoplastic polyester which is non-compatible with the thermoplastic polyamide and has a higher melting point.
2. 2. The artificial hair fiber according to claim 1, wherein, The polymer antistatic agent has a melting point of 160-250 ℃.
3. 3. The artificial hair fiber according to claim 1, wherein, The polymer antistatic agent has a melt flow rate of 10g/10 min-40 g/10 min at 215 ℃.
4. 4. The artificial hair fiber according to claim 1, wherein, The polymer antistatic agent has a surface intrinsic resistance value of 10 6 Ω/□～10 10 Ω/≡.
5. 5. The artificial hair fiber according to claim 1, wherein, The polymer antistatic agent is contained in an amount of 0.5 to 10 wt%.
6. 6. The fiber for artificial hair according to any one of claims 1 to 5, which has a weight ratio of thermoplastic polyamide to thermoplastic polyester of 75/25 to 85/15.
7. 7. The fiber for artificial hair according to any one of claims 1 to 5, which has a concave-convex shape formed on a surface, wherein the convex portions of the concave-convex shape include particles of thermoplastic polyester.
8. 8. The fiber for artificial hair according to any one of claims 1 to 5, which has a matrix comprising thermoplastic polyamide and a domain structure comprising thermoplastic polyester.
9. 9. The artificial hair fiber according to any one of claims 1 to 5, wherein, The thermoplastic polyamide is at least one thermoplastic resin selected from the group consisting of linear saturated aliphatic polyamide, alternating copolymer of hexamethylenediamine and terephthalic acid, and alternating copolymer of m-xylylenediamine and adipic acid.
10. 10. The artificial hair fiber according to any one of claims 1 to 5, wherein, The thermoplastic polyester is at least one thermoplastic resin selected from polyethylene terephthalate and polybutylene terephthalate.
11. 11. A wig comprising a wig base and the artificial hair fiber according to any one of claims 1 to 10 implanted in the wig base.

Description

Fiber for artificial hair and wig Technical Field The present invention relates to a fiber for artificial hair used for wigs, hair-increasing hairs, or hair substitute hairs, and more particularly, to a fiber for artificial hair comprising polyamide. Background The fiber for artificial hair containing polyamide is more flexible and pliable than synthetic fibers such as polyester, and has a texture and a feel similar to those of natural hair. On the other hand, however, it is difficult to exhibit a natural hair-specific shine exhibited by the irregularities of the stratum corneum. In addition, fibers for artificial hair generally have low moisture retention, generate static electricity during hair styling, and make it difficult to comb the hair style. Patent document 1 describes a fiber for artificial hair, which is formed of a1 st thermoplastic resin as a matrix and a2 nd thermoplastic resin which is incompatible with the 1 st thermoplastic resin and has a melting point different from that of the 1 st thermoplastic resin, and has a surface with a concave-convex shape, and the convex portion of the fiber is formed of the 1 st thermoplastic resin. The fiber for artificial hair of patent document 1 can suppress gloss while maintaining the natural hair's gloss without impairing the physical properties such as strength of the matrix. Patent document 2 describes a fiber material for artificial hair, which is obtained by mixing an additive containing a polyalkylene ether phosphate compound with polyamide to prepare filaments, and then eluting the additive. Since the above-mentioned additive has water retention and antistatic properties, the fiber material for artificial hair of patent document 2 exhibits water retention and antistatic properties. However, on the other hand, the trace of the original additive is formed as a concave portion or a sponge-like cavity due to the elution of the additive, and small voids are formed on the surface of the fiber material. Patent document 3 describes a polyamide fiber for artificial hair, which is formed from a nylon 46 polymer composition containing cuprous halide and an alkali metal halide or an alkaline earth metal halide as a heat-resistant agent. The polyamide fiber for artificial hair may be added with a conductive substance such as conductive carbon black, so that deterioration of shape retention due to electrification of static electricity and dirt due to adhesion of dust or the like can be prevented when the polyamide fiber is used as artificial hair. Prior art literature Patent literature Patent document 1 WO2010/134561 Patent document 2 Japanese patent publication No. 47-37649 Patent document 3 Japanese patent laid-open No. 1-282309 Disclosure of Invention Problems to be solved by the invention The artificial hair is preferably preformed with a given curl at the manufacturing stage. By doing so, when a user of artificial hair brushes a hairstyle, the brush-shaped hairstyle can be maintained for a long time. In addition, the artificial hair is preferably not electrostatically charged. In this case, the user can easily perform an operation of forming a desired hairstyle using a comb or the like (hereinafter, sometimes referred to as "styling"). For example, the fiber for artificial hair comprising polyamide described in patent document 1 is insufficient in antistatic property and shaping property by heat treatment (hereinafter, sometimes referred to as "heat-shaping property"), and there is still a problem that formation of curl in the production stage and shaping at the time of use are difficult to perform. In the case of using the additive of patent document 2, small voids, which are not normally present in natural hair, are formed on the surface of the fiber material, and it is difficult to exhibit a shine peculiar to natural hair. Further, since the additive of patent document 2 is transferred from the inside to the surface of the fiber material, the additive is detached each time the shampoo and the wiping are performed, and thus the antistatic property is not sufficiently sustained. The conductive material of patent document 3 is not compatible with polyamide, and has a large influence on the physical properties of the fiber for artificial hair such as flexibility and strength, and when it is used, reproduction of the texture of natural hair becomes difficult. The present invention has been made to solve the above problems, and an object of the present invention is to provide a fiber for artificial hair comprising polyamide, which has a shiny feel that is suppressed in gloss similar to natural hair, is excellent in sustained antistatic properties, and is also excellent in heat-setting properties. Means for solving the problems The present invention provides a fiber for artificial hair, comprising a thermoplastic polyamide and a polymer antistatic agent having compatibility with the thermoplastic polyamide, wherein the polymer antistatic agent has a melting poin