Extruded tubing and catheters having helical liquid crystal fibr

Details Extruded tubing and catheters having helical liquid crystal fibr Extruded tubing and catheters having helical liquid crystal fibr

1992-08-24

1993-09-28

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604283, 138153, A61M 2500

Patent

active

052483053

ABSTRACT:
Extruded catheters and other flexible plastic tubing may be manufactured with improved rotational and/or longitudinal stiffness, compared with catheters made of more conventional plastics. A tubing of liquid crystal polymer plastic-containing material may be extruded through a tube extrusion die while rotating the inner and outer die walls to provide circumferential shear to the extruded tube. Thus the liquid crystal polymer is oriented in a helical manner to provide improved properties, including greater rotational stiffness.

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