Process for making chemical resistant pump diaphragm

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/16 (2006.01) B29C 45/18 (2006.01) F04B 43/02 (2006.01) F04B 53/00 (2006.01)

Patent

CA 2315998

A method for making an injection molded multilayer polymer pump diaphragm having one side resistant to chemicals. The method can include injecting molten polymer material of a first type having chemical resistance properties into a first pump diaphragm mold cavity to produce a first pump diaphragm layer; curing the first pump diaphragm layer; applying an adhesive to one side of the first pump diaphragm layer; placing the first pump diaphragm layer in a second pump diaphragm mold cavity sized to receive an amount of a second type of polymer material against the adhesive painted side of the first pump diaphragm layer; injecting molten polymer material of the second type into the second pump diaphragm mold cavity into contact with the adhesive to produce a second pump diaphragm layer adhered to first pump diaphragm layer; and curing the second pump diaphragm layer such that said first and second pump diaphragm layers adhere together to form a pump diaphragm having one side which is resistant to chemicals.

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