Material for valve seats
AssigneeKitz Corporation
InventorKazuhisa Kubota
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Abstract
A material for valve seats is molded of a composite resin. The composite resin is composed of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroalkylvinylether. The amount of the copolymer falls in the range of from 3% to 30% by weight, preferably in the range of from 10% to 30% by weight, based on the total amount of the composite resin.
Claims3
A valve seat prepared from a resin composition consisting of a blend of powders of 97 to 70% by weight of polytetrafluoroethylene and 3 to 30% by weight of a copolymer of tetrafluoroethylene and perfluoroalkylvinylether.
A valve including a valve seat prepared from a resin composition consisting of a blend of powders of 97% to 70% by weight of polytetrafluoroethylene and 3 to 30% by weight of a copolymer of tetrafluoroethylene and perfluoroalkylvinylether.
Dependencies are inferred from the claim text.