Laminated porous polytetrafluoroethylene tube and its process of

Details Laminated porous polytetrafluoroethylene tube and its process of Laminated porous polytetrafluoroethylene tube and its process of

1982-06-04

1984-10-23

Anderson, Philip

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

156 79, 156184, 264 41, 264 453, 264127, 2642888, 264DIG66, 428422, F16L 916, B32B 2732, B29D 724, B29D 2700

Patent

active

044788983

ABSTRACT:
A method of manufacturing a porous tetrafluoroethylene tube comprises forming a sheet of tetrafluoroethylene containing a lubricant, winding it into a tubular shape, wrapping reinforcing material about the tubular shape to form a tubular product, rolling the tubular product so that it may have a uniform wall thickness, preheating the tubular product at a temperature lower than 327.degree. C., stretching the tubular product longitudinally, and heating it at a temperature higher than 327.degree. C., while holding it in its stretched position. The method may also be used to manufacture a tube containing 15 to 95% by weight of a filler.

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patent: 4443511 (1984-04-01), Worden et al.

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