公开(公告)号：US10385209B2

公开(公告)日：2019-08-20

申请号：US15529846

申请日：2015-09-09

Applicant: Denka Company Limited

Inventor： Yudai Ogawa ,  Kouta Nagaoka ,  Atsushi Horihata ,  Shigeharu Yoshii ,  Atsushi Takei

IPC: C08L77/06 ,  A41G3/00 ,  D01F6/90 ,  C08K3/22 ,  C08L63/00 ,  D01F1/07

Abstract: Polyamide-based fiber for artificial hair that is excellent in drip resistance, texture, and productivity is provided. According to the present invention, provided is fiber for artificial hair, including a resin composition containing: aliphatic polyamide; semi-aromatic polyamide with a skeleton obtained by polycondensation of aliphatic diamine and aromatic dicarboxylic acid; and a bromine-based flame retardant.

公开(公告)号：US20170260391A1

公开(公告)日：2017-09-14

申请号：US15529846

申请日：2015-09-09

Applicant: Denka Company Limited

Inventor： Yudai Ogawa ,  Kouta Nagaoka ,  Atsushi Horihata ,  Shigeharu Yoshii ,  Atsushi Takei

IPC: C08L77/06 ,  D01F6/90 ,  A41G3/00

CPC classification number: C08L77/06 ,  A41G3/00 ,  C08K3/2279 ,  C08L63/00 ,  C08L2201/02 ,  C08L2203/12 ,  C08L2205/025 ,  C08L2205/16 ,  C08L2205/22 ,  D01F1/07 ,  D01F6/90 ,  C08L69/00 ,  C08L25/18 ,  C08L71/10

Abstract: Polyamide-based fiber for artificial hair that is excellent in drip resistance, texture, and productivity is provided. According to the present invention, provided is fiber for artificial hair, including a resin composition containing: aliphatic polyamide; semi-aromatic polyamide with a skeleton obtained by polycondensation of aliphatic diamine and aromatic dicarboxylic acid; and a bromine-based flame retardant.

公开(公告)号：US20220095727A1

公开(公告)日：2022-03-31

申请号：US17424107

申请日：2020-02-13

Applicant: DENKA COMPANY LIMITED

Inventor： Atsushi Horihata ,  Atsushi Takei

IPC: A41G3/00 ,  D01D10/02

Abstract: An artificial hair fiber is superior in productivity and flame retardance, and is suppressed in color unevenness. An artificial hair fiber, including polyamide; and 5 to 40 parts by mass of bromine flame retardant and 0.01 to 10 parts by mass of pigment processing pigment with respect to 100 parts by mass of the polyamide; wherein the pigment processing pigment includes a colorant and a dispersant; the dispersant is contained by 20 to 80 mass % with respect to 100 mass % of total amount of the colorant and the dispersant; the dispersant includes one or more selected from the group consisting of montanoic acid metallic salt, montanoic acid wax, polyethylene wax, and fluorine wax, is provided.

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).

公开(公告)号：US20190090565A1

公开(公告)日：2019-03-28

申请号：US16085898

申请日：2017-03-21

Applicant: DENKA COMPANY LIMITED

Inventor： Koji Miyata ,  Atsushi Horihata ,  Kazuhito Sonoda ,  Atsushi Takei

IPC: A41G3/00 ,  D01F8/14

Abstract: Provided is an artificial hair fiber which can prevent detachment between core and sheath, having superior texture close to human hair, and having superior curl retention. An artificial hair fiber has a core-sheath structure, including: a core; and a sheath covering the core; and: the core includes a core resin composition including polyester; the sheath includes a sheath resin composition including polyamide; the core and the sheath have a core/sheath mass ratio of 40/60 to 90/10; and when a melt viscosity of the polyester of the core is expressed as a, and a melt viscosity of the polyamide of the sheath is expressed as b, a viscosity ratio a/b is 0.5 to 2.5.