EXPANDABLE TFE COPOLYMERS METHOD OF MAKING AND POROUS EXPANDED ARTICLES THEREOF

摘要

There is provided a true tetrafluoroethylene (TFE) copolymer in the form of a fine powder wherein the copolymer comprises polymerized comonomer units of at least one comonomer other than TFE in a concentration of at least 1.0 wt% And the concentration may exceed 5.0 wt%, wherein the copolymer is swellable, i.e. the copolymer is expanded to form a strong and useful expanded TFE aerial with a microstructure of nodes interconnected by fibrils, A combined article can be manufactured. Articles made from such expandable copolymers can include tapes, films, films, fibers, and are suitable for a variety of end applications including medical devices.