Production process for parts of a perfluoropolymer composition
OwnerJ. David Booze, Clifford K. Deakyne +1inventors
InventorsJ. David Booze, Clifford K. Deakyne, Thomas P. Gannett
Life of this patent
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Abstract
Perfluoropolymer parts containing (reinforcing) fibers oriented parallel to the surface of the parts may be joined by frictional welding processes such as vibration welding and ultrasonic welding without disturbing the orientation of the fibers. The parts may be used directly or cut into other shapes. Such parts are useful where high temperature resistance and/or chemical resistance is desired along with good physical properties such as strength and/or toughness. These types of parts include gaskets and seal rings.
Claims13
A process for forming a part comprising a perfluoropolymer or a polychlorotrifluoroethylene polymer, the process comprising the steps of:
- (a) contacting a flat surface of a first part comprising a perfluoropolymer with a flat surface of a second part comprising either a perfluoropolymer or a polychlorotrifluoroethylene polymer, said first and second parts comprising fibers oriented essentially parallel to a plane of said flat surfaces;
- (b) maintaining contact between said flat surfaces of said first and second parts while moving said first part and said second part in relationship to one another in order to create sufficient frictional heat between said first and second parts whereby the respective flat surfaces of said first and second parts melt and/or soften;
- and,
- (c) halting the motion of said first and second parts while maintaining contact between said flat surfaces for a time sufficient to allow the flat surfaces of said first and second parts to cool and adhere to one another.
Dependencies are inferred from the claim text.