Japan Exlan Company Limited

Yoshihiro Watanabe

Ryosuke Nishida

Noriyuki Kohara

Hirotaka Shiota

Takahisa Kida

Ryuichi Kasahara

Yoshiki Yamato

The present invention is an antistatic acrylic fiber which comprises 90 to 99% by weight of acrylonitrile polymer containing 80 to 100% by weight of acrylonitrile as a constituting component and 10 to 1% by weight of acrylic antistatic resin containing 10 to 70% by weight of acrylonitrile as a constituting component, characterized in that alkali metal ion is contained in the fiber in an amount of not less than 150 ppm. The acrylic fiber of the present invention has antistatic property which does not lower so much even if the fiber is subjected to a spinning and dyeing step.

Antistatic acrylic fiber and a method for manufacturing the same

Disclosed are a hot-melting acrylonitrile (AN) polymer composition comprising a non-volatile component modified from AN alone or a AN monomer composition through chemical reaction, an AN polymer and water, a method for producing the composition, and a method for producing a shaped article of AN polymer by melting the composition under heat followed by shaping the melt. The composition and the shaped article do not contain toxic AN and AN monomer mixture.

Acrylonitrile polymer compositions, method for producing the

A process for producing a homogeneous phase melt of polyacrylonitrile suitable for extrusion molding and melt spinning, by the steps of preparing polymer/water crumb containing 30-60 wt % of polyacrylonitrile and dewatering the crumb in a molten state with stirring at temperatures above 140.degree. C. and at pressures above autogenous pressure until the concentration of the polymer in the crumb exceeds 70% by weight.

Process for producing homogeneous phase melt of polyacrylonitrile

Saturated or superheated steam, or an inert gas, or a combination thereof is introduced into a gas phase above a molten acrylonitrile polymer in a vessel having a stirrer, while the polymer has a temperature of at least 120.degree. C. and a pressure at least equal to its autogenous pressure. Any unreacted acrylonitrile monomer, or both any such monomer and any acrylonitrile monomer or water used as a plasticizer are removed by evaporation from the vessel.

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Okayama, Japan

Yoshihiro Watanabe