Thin-wall polytetrafluoroethylene tube

Details Thin-wall polytetrafluoroethylene tube Thin-wall polytetrafluoroethylene tube

1997-02-24

1999-10-26

Tsang, Cecilia J.

Stock material or miscellaneous articles

Hollow or container type article

428 349, 428 357, 428 363, 428 366, 428 3991, 428 3692, 623 1, B29D 2200

Patent

active

059724412

ABSTRACT:
A thin-wall PTFE (polytetrafluoroethylene) tube in the form of a tube of porous expanded PTFE film wherein the porous PTFE film has a microstructure containing a multiplicity of fibrils oriented substantially parallel to each other. The tube has a wall thickness of less than about 0.25 mm and is made from at least one first layer and at least one second layer of porous PTFE film, wherein the fibrils of the first and second layers are oriented substantially perpendicular to each other. Preferably the fibrils of the at least one first layer are oriented substantially parallel to the longitudinal axis of the tube and the fibrils of the at least one second layer of porous PTFE film are oriented substantially circumferential to the tube. The first and second layers may be inner and outer layers respectively, or alternatively their relationship may be reversed. Alternatively, either of the first and second film layers may be replaced with alternative reinforcing components such as a braid or at least one reinforcing rib.

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