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US 2001/0034170 A1Published application
Non-curling reinforced composite membranes with differing opposed faces, methods for producing and their use in varied applications
AssigneeSaint-Gobain Performance Plastics Corporation
InventorFrank M. Keese
Life of this patent
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Abstract
A double-faced PTFE-silicone rubber reinforced composite with curling tendency controlled is achieved by coating one side of a balanced PTFE/glass composite with liquid silicone rubber. Each face of the composite can perform independent functions in a single application, thereby optimizing performance.
Claims21
A fiber-reinforced flexible composite membrane having two compositionally distinct opposing faces, the membrane comprising:
- a fibrous reinforcement;
- a perfluoropolymer material coating on each side of the reinforcement, the perfluoropolymer in a balanced state having mechanical forces within the perfluoropolymer equal on each side of the reinforcement to prevent the membrane from curling;
- and
- an elastomer disposed over the perfluoropolymer material on one side of the reinforcement.
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A non-curling reinforced membrane with compositionally distinct opposed faces, the composite comprising:
- a glass reinforced fabric layer having two opposed faces;
- a PTFE coating applied to the fabric layer on both faces, the coating in a balanced state having mechanical forces within the PTFE equal on each side of the reinforcement to prevent the membrane from curling;
- and
- a layer of silicone rubber applied to one of said opposed faces previously coated with PTFE.
1 more element
Dependencies are inferred from the claim text.