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US 4,102,966 AGranted
Method of molding polytetrafluoroethylene
AssigneeProduits Chimiques Ugine Kuhlmann
InventorsGilbert Duperray, Andre Monnet, Claude Tournut
Life of this patent
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Abstract
Method of molding granular polytetrafluoroethylene powder which comprises compressing the powder in a mold at a pressure of between about 10 and 50 bars to form a preform and subjecting the preform to isostatic molding at a pressure of between about 100 and 1000 bars.
Claims13
A method for making a composite, complex, molded structure from granular polytetrafluoroethylene powder comprising:
- a. compressing granular polytetrafluoroethylene powder at a pressure between about 10 and 50 bars to cohere the granules into a consolidated preform,
- b. placing the preform in contact with additional polytetrafluoroethylene granules in an isostatic mold, and
- c. subjecting the preform in step (b) to isostatic molding at a pressure between about 100 and 1000 bars to cohere the preform and the additional granules into a complex, molded, composite structure.
Dependencies are inferred from the claim text.