Method for the extrusion of tetrafluoroethylene polymer tubes

Details Method for the extrusion of tetrafluoroethylene polymer tubes Method for the extrusion of tetrafluoroethylene polymer tubes

1982-05-17

1984-02-07

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Autogenously or by activation of dry coated particles

264330, B27J 500

Patent

active

044302835

ABSTRACT:
Tetrafluoroethylene polymer tubes suitable for the preparation of lined pipe are prepared by ram extrusion wherein the tube is extruded above the sinter temperature and cooled below its crystalline melting point while radially unsupported to provide a tube of improved dimensional stability under thermal cycling.

REFERENCES:
patent: 2847711 (1958-08-01), Hibbard
patent: 4104394 (1978-08-01), Okita
patent: 4203938 (1980-05-01), Burnett et al.

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