Porous flexible radially expanded fluoropolymers and process for producing the same.

摘要

An interpenetrated matrix of a polytetrafluoroethylene and an elastomer is formed into a composite material which is flexible, durable and highly porous with a tight microporous structure and has a high rate of retractability. The composite material is subjected to radial expansion to produce shaped articles such as tubes and rods with excellent compliance, flexibility and elasticity. More particularly, the composite material can be utilized to produce vascular grafts with excellent biological compatibility that are capable of dynamic local diameter change responsive to pulsatile blood pressure change.