METHOD FOR MANUFACTURING POLYVINYL CHLORIDE-BASED ARTIFICIAL HAIR FIBER

WIPO Patent Application WO/2017/221773

A1

Provided is a method for manufacturing a polyvinyl chloride-based artificial hair fiber which maintains the texture of a fiber formed of a polyvinyl chloride-based resin fiber containing a crosslinked vinyl chloride-based resin and has a low glossiness and in which the knitting properties, gear processability and spinning properties are improved. The method according to the present invention for manufacturing a polyvinyl chloride-based artificial hair fiber comprises a step for spinning a polyvinyl chloride-based resin-containing resin composition from a nozzle hole, wherein: the resin composition contains a polyvinyl chloride-based resin; the polyvinyl chloride-based resin contains 90-99 parts by mass of a polyvinyl chloride-based resin (A) having a viscosity-average degree of polymerization of 450-1700 and 10-1 parts by mass of a crosslinked vinyl chloride-based resin (B) in which the viscosity-average degree of polymerization of a tetrahydrofuran soluble component is 1800-2300; the difference in viscosity-average degree of polymerization between the polyvinyl chloride-based resin (A) and the tetrahydrofuran soluble component in the crosslinked vinyl chloride-based resin (B) is 600-1850; and the minimum cross-sectional secondary moment (Imin) of the nozzle hole, relative to an axis passing through the centroid of a cross section of the nozzle hole, is 1×10-4 mm4-15×10-4 mm4.

AKAHANE TAKUYA (JP)
HORIHATA ATSUSHI (JP)
KUME MASASHI (JP)

PCT/JP2017/021872

December 28, 2017

June 13, 2017

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DENKA COMPANY LTD (JP)

D01F6/48

WO2006093009A1	2006-09-08
WO2004090208A1	2004-10-21

JPH1150330A

1999-02-23

SK INTELLECTUAL PROPERTY LAW FIRM et al. (JP)

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