Manufacture of polytetrafluoroethylene tubes

Details Manufacture of polytetrafluoroethylene tubes Manufacture of polytetrafluoroethylene tubes

1976-07-06

1980-05-20

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Autogenously or by activation of dry coated particles

264331, B27J 500

Patent

active

042039380

ABSTRACT:
Polytetrafluoroethylene tubes are prepared by isostatic molding of polytetrafluoroethylene powder over a cylindrical mandral at a temperature below about 19.degree. C. The compacted preform and mandrel are then warmed to a temperature above about 19.degree. C. and the preform removed from the mandrel. Sticking of the preform to the mandrel is avoided.

REFERENCES:
patent: 2939178 (1960-06-01), Haroldson et al.
patent: 3140327 (1964-07-01), Dettmer
patent: 3260774 (1966-07-01), Harlow

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