Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1993-05-20
1995-03-28
Edwards, N.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428357, 428364, 1621574, 1621575, D02G 300
Patent
active
054015766
ABSTRACT:
A new, pulp-like, acrylic short fiber having excellent heat- and chemical-resistance is provided. The fiber has a thickness distribution of 0.1 .mu.m to 50 .mu.m, a length distribution of 1 mm to 20 mm, and a thermal transition temperature (Tg) of above 200.degree. C. The fiber is produced by heating a mixture of polyacrylonitrile and water of about 5% to 100% by weight to temperatures above hydration-melting temperature under seal to an amorphous melt; cooling the resulting amorphous melt to temperatures between the melting and the solidifying temperatures of the melt to form a supercooled melt; extruding the resulting supercooled melt to give extrudates; heat-stabilizing the resulting extrudates at temperatures between 180.degree. C. and 300.degree. C. for 1 minute to 4 hours after drying and drawing; and cutting and beating the resulting heat-stabilized extrudates into an appropriate size.
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patent: 5219501 (1993-06-01), Yoon et al.
B. G. Frushour, "A New Thermal Analytical Technique for Acrylic Polymers", Polymer Bulletin 4, pp. 305-314 (1981).
Cho Jae W.
Kim Byung C.
Lee Chul J.
Min Byung G.
Son Tae W.
Edwards N.
Korea Institute of Science and Technology
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