Process for the production of acrylic short fibers without spinn

Plastic and nonmetallic article shaping or treating: processes – Utilizing special inert gaseous atmosphere or flushing mold...

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264143, 264206, 2642104, 2642106, 2642108, 26421117, D01F 618

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active

052195015

ABSTRACT:
A process for the production of pulp-like short fibers having a highly-oriented fibril structure without spinning is provided. This process comprises heating a mixture of water and an acrylonitrile homopolymer or copolymer to a temperature above the melting temperature of the mixture under enclosed conditions to form an amorphous melt; cooling the resulting amorphous melt to a temperature below the melting temperature to obtain a supercooled melt phase; extruding the resulting supercooled melt phase through a slit die at a temperature between the melting and the solidifying temperatures of the melt phase into an external atmosphere to give extrudates; and subjecting the resulting extrudates to drawing and heat treatment followed by beating mechanically.

REFERENCES:
patent: 2417294 (1947-03-01), D'Alelio
patent: 3402231 (1968-09-01), Bynum et al.
patent: 3984601 (1976-10-01), Blickenstaff
patent: 4163770 (1979-08-01), Porosoff
patent: 4650624 (1987-03-01), Reinehr et al.
Bruce G. Frushour, "A New Thermal Analytical Technique for Acrylic Polymers," Polymer Bulletin 4, pp. 305-314 (1981).

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