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公开(公告)号：US12031240B2
公开(公告)日：2024-07-09
申请号：US17296280
申请日：2019-11-15
Applicant: DENKA COMPANY LIMITED
Inventor： Atsushi Horihata , Atsushi Takei
CPC classification number: D01F6/48 , A41G3/00 , D10B2321/041 , D10B2401/061 , D10B2503/08
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.
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公开(公告)号：US20200288801A1
公开(公告)日：2020-09-17
申请号：US16765789
申请日：2019-03-01
Applicant: DENKA COMPANY LIMITED
Inventor： Takashi Muraoka , Atsushi Horihata , Atsushi Takei
Abstract: A fiber bundle for artificial hair that has good curl setting characteristics, good combing property, tactile sensation and glossiness similar to human hair, and flame retardancy is provided. According to the present invention, provided is a fiber bundle for artificial hair is comprising 20 to 90 parts by mass of a polyester fiber and 10 to 80 parts by mass of a polyamide fiber, wherein the polyester fiber contains a polyester resin (A), a flame retardant (C1) and an auxiliary flame retardant (D1), and the polyamide fiber contains a polyamide resin (B), a flame retardant (C2) and an auxiliary flame retardant (D2).
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公开(公告)号：US10137660B2
公开(公告)日：2018-11-27
申请号：US14649783
申请日：2013-07-18
Applicant: Denka Company Limited
Inventor： Junpei Fujiwara , Tomohiro Osawa , Shogo Hoshino , Toshio Nagano , Atsushi Takei
Abstract: Provided is a water-repellent, thermoplastic resin sheet provided with a textured layer having a microtexture on one surface side, and a water repellent layer formed with an approximately constant thickness on the aforementioned one surface side of the textured layer, wherein at least the surface region on the one surface side of the textured layer is a cross-linked material which maintains the microtexture even after heated drawing, and the water-repellent layer is formed from an olefin copolymer resin containing hydrophobic oxide particles. Also provided is a molded article, such as a molded container, formed by thermoforming the thermoplastic resin sheet.
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公开(公告)号：US10905183B2
公开(公告)日：2021-02-02
申请号：US16088799
申请日：2017-03-07
Applicant: DENKA COMPANY LIMITED
Inventor： Megumi Tsukahara , Atsushi Horihata , Atsushi Takei
Abstract: A resin composition for flame retardant artificial hair which has favorable transparency and combability similar to those of human hair and exhibits excellent flame retardancy. A resin composition for flame retardant artificial hair is obtained by configuring a resin composition including 100 parts by mass of a polyester (A) and 5-40 parts by mass of a bromine-containing flame retardant (B) including at least one kind selected from poly(pentabromobenzyl acrylate), a brominated phenol resin, and polydibromophenylene oxide, wherein the melt viscosity of the polyester (A) is 80-300 Pa·s.
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公开(公告)号：US10856598B2
公开(公告)日：2020-12-08
申请号：US16085898
申请日：2017-03-21
Applicant: DENKA COMPANY LIMITED
Inventor： Koji Miyata , Atsushi Horihata , Kazuhito Sonoda , Atsushi Takei
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.
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Patent Agency Ranking
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
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.
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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
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
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.
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公开(公告)号：US09908311B2
公开(公告)日：2018-03-06
申请号：US14650131
申请日：2013-07-18
Applicant: DENKA COMPANY LIMITED
Inventor： Junpei Fujiwara , Atsushi Takei , Tomohiro Osawa
CPC classification number: B32B27/08 , B32B1/02 , B32B3/30 , B32B27/18 , B32B27/32 , B32B2307/7244 , B32B2307/73 , B32B2439/70 , C08F110/02 , C09K3/18
Abstract: Provided is a water-repellent, thermoplastic resin sheet including a textured layer which is formed from a polyethylene resin composition comprising a water repellent agent and which has a microscopic texture on one surface side, wherein at least the surface region of the textured layer is a cross-linked material which maintains the microscopic texture even after heated drawing. Also provided is a molded article, such as a molded container, formed by thermoforming the thermoplastic resin sheet.
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10.发明授权公开(公告)号：US12123110B2
公开(公告)日：2024-10-22
申请号：US17423749
申请日：2020-02-12
Applicant: DENKA COMPANY LIMITED
Inventor： Atsushi Horihata , Takashi Muraoka , Atsushi Takei
CPC classification number: D01F6/60 , C08K3/34 , D01F1/10 , D01F8/12 , D01F8/16 , A41G3/0083 , D10B2331/02 , D10B2503/08
Abstract: A fiber for artificial hair is constituted of a resin composition containing an aliphatic polyamide and inorganic particles, and in a particle size distribution of the inorganic particles measured by a laser diffraction method, a ratio (D50/D10) of D50, which is a particle size equivalent to a cumulative percentage of 50% based on volume, to D10, which is a particle size equivalent to a cumulative percentage of 10% based on volume, is 1.8 or more and 3.0 or less.
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