Denka Company Limited

Atsushi Takei

Atsushi Horihata

Junpei Fujiwara

Masashi Kume

Tomohiro Osawa

Kouta Nagaoka

Yusuke Masuda

Toshio Nagano

Masamichi Kanaoka

Yudai Ogawa

Shogo Hoshino

Yasushi Hirokawa

Rentaroh Suzuki

Koji Miyata

Kazuhito Sonoda

Shigeharu Yoshii

Megumi Tsukahara

Yutaka Aoki

Masamich Kanaoka

A fiber for artificial hair, the fiber containing 50 parts by mass or more and 95 parts by mass or less of a vinyl chloride-based resin and 5 parts by mass or more and 50 parts by mass or less of a vinyl-based copolymer resin, in which the vinyl-based copolymer resin contains 60% by mass or more and less than 70% by mass of a styrene-based monomer unit and more than 30% by mass and 40% by mass or less of an acrylonitrile-based monomer unit on the basis of the entire vinyl-based copolymer resin.

Fiber for artificial hair and hair accessory product

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.

Fiber for artificial hair and head accessory product

A fiber for artificial hair constituted of a resin composition containing an aliphatic polyamide. A weight average molecular weight Mw of a dissolved component obtained when the fiber for artificial hair is dissolved in hexafluoroisopropanol is 46,000 or more and less than 65,000.

The present invention provides a fiber for artificial hair and a hair decorating product having superior combing property. A fiber for artificial hair includes vinyl chloride based resin, vinyl based copolymer, and vinyl chloride based acrylic graft copolymer.

Fiber for artificial hair and hair decorating product

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&#xb7;s.

Resin composition for artificial hair and molded body of same

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&#xd7;{(bending rigidity in a state after conditioning for 24 hours at 30&#xb0; C.&#xd7;90% RH)/(bending rigidity in a state after conditioning for 24 hours at 23&#xb0; C.&#xd7;50% RH)}&#x2003;&#x2003;(1)heat shrinkage ratio (%)=100&#xd7;{(length before heat treatment)&#x2212;(length after heat treatment for 5 min at 155&#xb0; C.)}/(length before heat treatment)&#x2003;&#x2003;(2).

Fibers for artificial hair

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.

Fiber for artificial hair

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.

Polyamide-based fiber for artificial hair having exceptional dripping resistance upon combustion

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.

Water-repellent, thermoplastic resin sheet, and molded article

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.

Disclosed are a multilayer styrenic resin sheet including 10 to 50 laminated layers which are each made of a styrenic resin composition that includes 29 to 65 mass % of a styrene/conjugated diene copolymer (A), 51 to 15 mass % of a polystyrene resin (B) and 20 to 9 mass % of an impact-resistant polystyrene resin (C) and which each have an average thickness of 2 to 50 &#x3bc;m; and a packaging material (such as carrier tape or tray) for electronic components which is formed from the multilayer styrenic resin sheet. The melt tension of the styrenic resin composition at 220&#xb0; C. is preferably 10 to 30 mN, and the content of the conjugated diene is preferably 10 to 25 mass % relative to 100 mass % of the copolymer (A).

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Kamakura, Japan

Atsushi Takei