公开(公告)号：US20190307192A1

公开(公告)日：2019-10-10

申请号：US16309857

申请日：2017-06-27

Applicant: DENKA COMPANY LIMITED

Inventor： Atsushi Horihata ,  Atsushi Takei ,  Rentaroh Suzuki

IPC: A41G3/00 ,  A41G5/00 ,  D01F6/60

Abstract: The present invention is to provide a fiber for artificial hair which can freely change the hairstyle at home while maintaining the wave shape of the fiber.A fiber for artificial hair having a bending rigidity maintaining ratio defined by formula (1) is 40 to 80% and a heat shrinkage ratio defined by formula (2) is 0.0 to 5.0% is provided. bending rigidity maintaining ratio (%)=100×{(bending rigidity in a state after conditioning for 24 hours at 30° C.×90% RH)/(bending rigidity in a state after conditioning for 24 hours at 23° C.×50% RH)}  (1) heat shrinkage ratio (%)=100×{(length before heat treatment)−(length after heat treatment for 5 min at 155° C.)}/(length before heat treatment)  (2).

公开(公告)号：US10888132B2

公开(公告)日：2021-01-12

申请号：US16309857

申请日：2017-06-27

Applicant: DENKA COMPANY LIMITED

Inventor： Atsushi Horihata ,  Atsushi Takei ,  Rentaroh Suzuki

IPC: A41G3/00 ,  A61G5/00 ,  D01F6/60 ,  A41G5/00

Abstract: The present invention is to provide a fiber for artificial hair which can freely change the hairstyle at home while maintaining the wave shape of the fiber.
A fiber for artificial hair having a bending rigidity maintaining ratio defined by formula (1) is 40 to 80% and a heat shrinkage ratio defined by formula (2) is 0.0 to 5.0% is provided. bending rigidity maintaining ratio (%)=100×{(bending rigidity in a state after conditioning for 24 hours at 30° C.×90% RH)/(bending rigidity in a state after conditioning for 24 hours at 23° C.×50% RH)}  (1) heat shrinkage ratio (%)=100×{(length before heat treatment)−(length after heat treatment for 5 min at 155° C.)}/(length before heat treatment)  (2).