Toray Industries, Inc.

Toray Coatex Co., Ltd.

Hajime Nishimura

Yukihiro Matsuzaki

Makoto Nishimura

Hiroyasu Kato

Kuniyasu Shiro

Satoshi Yanagisawa

Masaru Ueno

Katsuya Okajima

Makoto Kaneko

Tomoharu Hirose

Akito Kuroda

Masaharu Wada

Makato Nishimura

Koji Yamano

Yu Matsuoka

A sheet material has good mechanical properties, flexibility, lightweight properties, and quality, and also relates to a production method therefor. The sheet material includes, as constitutional components, an elastic polymer and nonwoven fabric composed mainly of ultrafine hollow fiber with an average monofilament diameter in the range of 0.05 to 10 &#x3bc;m, the ultrafine hollow fiber containing 2 to 60 hollows.

Sheet material and manufacturing method thereof

A base body for an artificial leather includes an intertwined fiber body mainly including an ultrafine fiber having a 0.01 to 10 &#x3bc;m fiber diameter and an elastic polymer, the ultrafine fiber including, as a constituent polymer, a polyester obtained from a dicarboxylic acid and/or an ester-forming derivative thereof, and a diol, the polyester containing 15 to 500 ppm of a 1,2-propanediol-derived component.

Base body for artificial leather

The present invention provides a conjugated fiber suitable for use as a crimped fiber capable of producing an artificial leather having highly dense texture and good quality. The present invention also provides a base body for an artificial leather and an artificial leather produced by using such conjugated fiber. The conjugated fiber of the present invention includes a conjugated fiber comprising a readily soluble polyester component and a less readily soluble component, and the readily soluble polyester component comprises a copolymerized polyester having 5 to 10% by mole of 5-sodium sulfoisophthalate copolymerized therewith and the readily soluble polyester component contains a polyalkylene glycol. The polyalkylene glycol is in the form of streaks extending in longitudinal direction of the fiber in the longitudinal cross section of the conjugated fiber.

Conjugated fiber, base body for artificial leather, and artificial leather

A polishing pad is provided with a compression elastic modulus of 0.17 MPa or more and 0.32 MPa or less produced by preparing a nonwoven fabric formed of bundles of ultrafine fibers with an average monofilament diameter of 3.0 &#x3bc;m or more and 8.0 &#x3bc;m or less, preparing a polishing pad base by impregnating the nonwoven fabric with a polyurethane based elastomer in an amount of 20 mass % or more and 50 mass % or less relative to the mass of the polishing pad base, and laminating the polishing pad base with a porous polyurethane layer containing wet-solidified polyurethane as primary component which has openings with an average opening diameter of 10 &#x3bc;m or more and 90 &#x3bc;m or less in its surface to serve as polishing surface layer.

Polishing pad

Growing community of inventors

Otsu, Japan

Hajime Nishimura