Fiber for artificial hair and head accessory product

Patent metadata

Field	Value
Publication number	US-2022018041-A1
Application number	US-201917296280-A
Country	US
Kind code	A1
Filing date	Nov 15, 2019
Priority date	Nov 29, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

A fiber for artificial hair formed of a polyvinyl chloride-based resin composition. The fiber for artificial hair has a value X1 of a loss tangent tans at 70° C. of 0.06 or more and 0.12 or less, when dynamic viscoelasticity is measured under the following conditions, and has a peak in a temperature range of 90° C. or higher and 110° C. or lower. (Dynamic viscoelasticity measurement conditions)The measurement is performed by sandwiching a bundle of 40 fibers for artificial hair that are arranged at a heating rate of 4° C./min and a frequency of 1 Hz.

First claim

1 . A fiber for artificial hair formed of a polyvinyl chloride-based resin composition,
wherein when dynamic viscoelasticity is measured under the following conditions, the fiber for artificial hair has a value X1 of a loss tangent tanδ at 70° C. of 0.06 or more and 0.12 or less, and has a peak in a temperature range of 90° C. or higher and 110° C. or lower, (dynamic viscoelasticity measurement conditions) the measurement is performed by sandwiching a bundle of 40 fibers for artificial hair that are arranged at a heating rate of 4° C./min and a frequency of 1 Hz.

2 . The fiber for artificial hair according to claim 1 ,
wherein a value X2 of a loss tangent tans at 60° C. obtained by the dynamic viscoelasticity measurement is 0.05 or more and 0.10 or less.

3 . The fiber for artificial hair according to claim 1 ,
wherein a cross section of the fiber for artificial hair has a shape selected from the group consisting of polygons, spectacles, and Y-shapes.

4 . The fiber for artificial hair according to claim 1 ,
wherein the polyvinyl chloride-based resin composition includes a non-crosslinked polyvinyl chloride-based resin and a crosslinked polyvinyl chloride-based resin, and a content of the crosslinked polyvinyl chloride-based resin with respect to 100 parts by mass of the non-crosslinked polyvinyl chloride-based resin is 2 parts by mass or more and 15 parts by mass or less.

5 . The fiber for artificial hair according to claim 4 ,
wherein the non-crosslinked polyvinyl chloride-based resin has a viscosity average degree of polymerization of 450 or more and 1,700 or less.

6 . The fiber for artificial hair according to claim 4 ,
wherein in the crosslinked polyvinyl chloride-based resin, a viscosity average degree of polymerization of a component dissolved in tetrahydrofuran is 500 or more and 2,300 or less.

7 . A head accessory product using the fiber for artificial hair according to claim 1 .

8 . A head accessory product using the fiber for artificial hair according to claim 2 .

Assignees

• Denka Company Ltd

Inventors

• Horihata Atsushi
• Takei Atsushi

Classifications

• D01F6/10

  from polyvinyl chloride or polyvinylidene chloride · CPC title

• D01D5/253

  with a non-circular cross section; Spinnerette packs therefor (D01D5/38 takes precedence) · CPC title

• D01F6/48 Primary

  of polymers of halogenated hydrocarbons · CPC title

• A41G3/0083 Primary

  Wigs characterised by their hair filaments · CPC title

• A41G3/00

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