Acrylic fiber for artificial hair, method for producing same, and head decoration product comprising same

Patent metadata

Field	Value
Publication number	US-10477908-B2
Application number	US-201715717280-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Mar 30, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

An acrylic fiber for artificial hair includes an acrylic polymer and an organic solvent that can dissolve the acrylic polymer, wherein the acrylic polymer includes 29.5 to 79.5% by weight of acrylonitrile, 20 to 70% by weight of vinyl chloride and/or vinylidene chloride, and 0.5 to 5% by weight of a sulfonic acid-containing vinyl monomer with respect to a total weight of the acrylic polymer, and wherein a content of the organic solvent in the acrylic fiber is 0.1 to 3% by weight.

First claim

What is claimed is:

1. An acrylic fiber for artificial hair, comprising an acrylic polymer and an organic solvent that can dissolve the acrylic polymer,
wherein the acrylic polymer comprises, with respect to a total weight of the acrylic polymer, 29.5 to 79.5% by weight of acrylonitrile, 20 to 70% by weight of vinyl chloride and/or vinylidene chloride, and 0.5 to 5% by weight of a sulfonic acid-containing vinyl monomer,
wherein a content of the organic solvent in the acrylic fiber is 0.1 to 3% by weight, and
wherein the acrylic fiber has a single fiber fineness of 30 to 100 dtex.

2. The acrylic fiber for artificial hair according to claim 1 , wherein the organic solvent is at least one selected from the group consisting of acetone, dimethylsulfoxide, N,N-dimethylformamide, dimethylacetamide, dimethylsulfone, ε-caprolactam, ethylene carbonate, and sulfolane.

3. A method for producing an acrylic fiber for artificial hair, the method comprising:
extruding a spinning solution through a spinning nozzle to form a yarn;
drawing the yarn to prepare a primary drawn yarn and washing it with water; and
impregnating the water-washed primary drawn yarn with an organic solvent that can dissolve the acrylic polymer so that a content of the organic solvent in the acrylic fiber is 0.1 to 3% by weight,
wherein the spinning solution comprises an acrylic polymer comprising, with respect to a total weight of the acrylic polymer, 29.5 to 79.5% by weight of acrylonitrile, 20 to 70% by weight of vinyl chloride and/or vinylidene chloride, and 0.5 to 5% by weight of a sulfonic acid-containing vinyl monomer, and
wherein the acrylic fiber has a single fiber fineness of 30 to 100 dtex.

4. The method for producing an acrylic fiber for artificial hair according to claim 3 , wherein the impregnating the water-washed primary drawn yarn is performed using a mixture of the organic solvent that can dissolve the acrylic polymer and a finishing oil.

5. The method for producing an acrylic fiber for artificial hair according to claim 3 , wherein the spinning solution is obtained by dissolving the acrylic polymer in one organic solvent selected from the group consisting of acetone, dimethylsulfoxide, N,N-dimethylformamide, and dimethylacetamide.

6. The method for producing an acrylic fiber for artificial hair according to claim 5 , wherein the extruding is performed by extruding the spinning solution into a coagulation liquid through the spinning nozzle; and wherein the drawing is performed by drawing the yarn in an aqueous solution of the organic solvent used for the spinning solution.

7. A hair ornament product comprising the acrylic fiber for artificial hair according to claim 1 .

8. The hair ornament product according to claim 7 , wherein the hair ornament product is at least one selected from the group consisting of a fiber bundle for hair, a weave, a wig, a braid, a toupee, a hair extension, and a hair accessory.

Assignees

• Kaneka Corp

Inventors

• Okamoto Akihiro
• Kano Aki
• Fujita Masato

Classifications

• A41G3/00

  Wigs (for dolls only A63H3/44) · CPC title

• A41G5/004 Primary

  Hairpieces, e.g. hair extensions · CPC title

• D10B2321/101

  modacrylic · CPC title

• A41G3/0083

  Wigs characterised by their hair filaments · CPC title

• A41G5/0006

  Toupées covering a bald portion of the head · CPC title