Method of fabricating welded PFA-to-PTFE structures

Details Method of fabricating welded PFA-to-PTFE structures Method of fabricating welded PFA-to-PTFE structures

1976-01-16

1978-02-14

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264267, 264275, B29B 300

Patent

active

040738566

ABSTRACT:
A method is described whereby perfluoroalkoxy (PFA) fluorocarbon resin is fusion bonded to polytetrafluoroethylene (PTFE) resin to provide united sections thereof and to provide a bonded or welded interconnection between separate sections of PTFE resin. The welds are obtained under minimal positive pressure, generally below about 40 psi, at a temperature above the gel point of the PTFE resin, generally between 635.degree. F. and 710.degree. F., with subsequent slow cooling under pressures somewhat higher and generally ranging between about 59 psi and 150 psi.

REFERENCES:
patent: 3206344 (1965-09-01), Elkins, Jr.
patent: 3946136 (1976-03-01), Fitz et al.

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