Process for post-spin finishing of polybenzoxazole fibers

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion

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264233, 264234, 264235, 264340, 264345, 264346, D01D 1002, D01D 1006

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054116945

ABSTRACT:
Improved polybenzoxazole fibers are made by a process for finishing a spun and drawn dope fiber, which contains polybenzoxazole polymer and polyphosphoric acid, including the steps of:

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Chemical Abstract 111:196226f (p. 59)(1989).
W. W. Adams et al., AFWAL-TR-86-4011 Processing Properties, Structure and Morphology of PBO and ABPBO Polymer Fibers, Aug. 1986.
English Translation of Japan 2-84,509 (Published Mar. 26, 1990).

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