Mitsui Chemicals, Inc.

Daisuke Nishiguchi

Satoshi Yamasaki

Goro Kuwamura

Takeshi Fukuda

Shinji Kiyono

Naoyuki Kakinuma

Toshihiko Nakagawa

Hidetaka Tsukada

Daisuke Hasegawa

Kenichi Goto

Shinsuke Ito

Hirokazu Morita

Tetsuya Hamada

Kazuhiro Kosumi

Kenichi Suzuki

Shigeyuki Motomura

Hisashi Kawanabe

Toshiaki Moriya

Kaoru Ueno

Masakazu Kageoka

Kazuto Usaka

Kei Ootsuki

Takuya Chikamoto

The eyewear material is an eyewear material containing thermoplastic polyurethane. The eyewear material has a tan &#x3b4; peak at both less than 0&#xb0; C. and 0&#xb0; C. or more and 70&#xb0; C. or less observed in dynamic viscoelasticity measurement in tensile mode under the measurement conditions of a temperature increase speed of 5&#xb0; C./min and a measurement frequency of 10 Hz.

Eyewear material, eyewear frame, and eyewear

A low-resilience polyurethane foam is produced by allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), and blowing agent (d) to react. The polyisocyanate (a) contains bis(isocyanatomethyl)cyclohexane, and the polyol (b) contains 5 to 30 mass % of polyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and 70 to 95 mass % of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g.

Low-resilience polyurethane foam and production method thereof

1,4-bis(isocyanatomethyl)cyclohexane contains 70 mol % or more and 95 mol % or less of a trans isomer relative to a total amount of a cis isomer and the trans isomer, and 0.1 ppm or more and 300 ppm or less of the compound represented by formula (1) below: 

1,4-bis(isocyanatomethyl)cyclohexane, polyisocyanate composition, polyurethane resin, molded article, eyewear material, eyewear frame, and lens

Disclosed is a granular polyurethane resin composition containing a thermoplastic polyurethane resin which contains a hard segment obtained by a reaction between a polyisocyanate and a chain extender. The polyisocyanate contains isocyanate groups of 1,4-bis(isocyanatomethyl)cyclohexane in an amount of not less than 50% by more relative to the total mole number of isocyanate groups.

Granular polyurethane resin composition and molded article of the same

A fiber mixture according to the invention comprises fibers A comprising a polymer A containing a thermoplastic polyurethane elastomer and fibers B comprising a thermoplastic polymer B other than the thermoplastic polyurethane elastomer, said thermoplastic polyurethane elastomer having a starting temperature for solidifying of 65&#xb0; C. or above as measured by a differential scanning calorimeter (DSC) and containing 3.00&#xd7;10or less polar-solvent-insoluble particles per g counted on a particle size distribution analyzer, which is based on an electrical sensing zone method, equipped with an aperture tube having an orifice of 100 &#x3bc;m in diameter. An elastic nonwoven fabric comprises the fiber mixture.

Mixed fiber and stretch nonwoven fabric comprising said mixed fiber and method for manufacture thereof

A spunbonded elastic nonwoven fabric according to the invention comprises fibers formed from a polymer comprising a thermoplastic polyurethane elastomer, wherein the thermoplastic polyurethane elastomer has a starting temperature for solidifying of 65&#xb0; C. or above as measured by a differential scanning calorimeter (DSC) and contains 3.00&#xd7;10or less polar-solvent-insoluble particles per g as counted on a particle size distribution analyzer, which is based on an electrical sensing zone method, equipped with an aperture tube having an orifice of 100 &#x3bc;m in diameter, and wherein the fibers have diameters such that the standard deviation of fiber diameters (Sn) divided by the average fiber diameter (X) (Sn/X) gives a value of 0.15 or less.

Stretch nonwoven fabric and method for production thereof

Microcellular polyurethane elastomer, and method of producing the same

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Sakai, Japan

Daisuke Nishiguchi