Toray Industries, Inc.

Shigeru Fujii

Hiroyoshi Tanaka

Teruo Koseki

Keizo Ono

Mitsuo Suzuki

Haruo Obara

Mototada Fukuhara

Ken-ichi Morita

Michihiko Tanaka

Hajime Machida

An improved electric resistance heating element made of a carbon material, provided around its surface with a layer essentially comprising carbon fiber, and an improved electric resistance heating furnace using the heating element.

Electric resistance heating element and electric resistance heating

The present invention relates to an acrylic fiber having excellent water absorbency. The fiber has a porous core and a relatively dense skin structure. It is a blended polymer which comprises an acrylic polymer copolymerized with a synthetic polymer which is miscible but substantially incompatible therewith, and is soluble in a solvent for the acrylic polymer but is insoluble in water.

Water absorbent acrylic fiber

An antistatic acrylic fiber having an electrical resistivity of about 10.sup.8 .OMEGA. centimeters or less. The fiber comprises (A) an acrylonitrile homopolymer or copolymer and (B) an antistatic polymer comprising a plurality of polyether segments disposed in said polymer (A), and wherein electrically conductive carbon black is dispersed in antistatic polymer (B). Preferably antistatic polymer (B) extends in the form of long and slender stripes in the polymer (A).

Antistatic acrylic fiber

An acrylic fiber having excellent antistatic properties is obtained by mixing a polymer (A) consisting mainly of acrylonitrile with a copolymer (B) consisting mainly of a polyetherpolyester block copolymer consisting of a polyester and compound represented by the general formula (1): ##EQU1## (wherein each of m and n is O or a positive integer, wherein 25 .ltoreq. m + n .ltoreq. 1000, and m .gtoreq. 10).

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Ehime, Japan

Shigeru Fujii