Pump diaphragm and method for making the same

Details Pump diaphragm and method for making the same Pump diaphragm and method for making the same

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 3/02 (2006.01) B29C 45/14 (2006.01) B32B 25/08 (2006.01) F04B 43/00 (2006.01)

Patent

CA 2282896

A composite pump diaphragm 10 includes a layer 12 fabricated from annealed polytetrafluoroethylene (PTFE) bonded to a layer 14 fabricated from an unreinforced thermoplastic elastomer including ethylene-propylene terpolymer (EPDM) and polypropylene. The diaphragm 10 is fabricated by chemically etching the PTFE layer 12, coating a surface thereof with a polyurethane adhesive, superimposing the layer 14 with layer 12 under heat and pressure, and allowing the superimposed layers to cure.

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