Method for preparing tubing and hollow fibers from non-crosslink

Details Method for preparing tubing and hollow fibers from non-crosslink Method for preparing tubing and hollow fibers from non-crosslink

1992-03-16

1993-07-06

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

264185, 264203, 2642095, 2642108, 26421117, B29C 3516, D01D 524, D01F 614

Patent

active

052251209

ABSTRACT:
This invention relates to hollow elongate articles such as tubing and fibers formed from non-crosslinked polyvinyl alcohol. The articles are prepared by extruding a solution of polyvinyl alcohol in the shape of the desired article into a coagulating bath concurrently with a stream of a non-solvent for the polymer. The stream occupies the area corresponding to the interior cavity of the article and prevents collapse of the cavity until the article has solidified in the coagulation bath.

REFERENCES:
patent: 4385094 (1983-05-01), Tanaka et al.
patent: 4851168 (1989-07-01), Graiver et al.

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