Laminated rubber stopper

Details Laminated rubber stopper Laminated rubber stopper

1985-05-21

1986-09-30

Norton, Donald F.

Bottles and jars

Closures

Stopper type

B65D 3900

Patent

active

046142762

ABSTRACT:
A laminated rubber stopper comprising a head portion and a leg portion which is to be inserted in an opening of a vessel, wherein at least a leg portion is laminated with a film of a copolymer of tetrafluoroethylene, ethylene and at least one fluorine-containing vinyl monomer copolymerizable with tetrafluoroethylene and ethylene, a molar ratio of tetrafluoroethylene and ethylene being from 62:38 to 90:10 and the amount of the fluorine-containing vinyl monomer being from 0.1 to 10% by mole based on the total number of mole of tetrafluoroethylene and ethylene, which has improved fitting with an opening of a vessel and sealing properties and can be produced with low failure rate.

REFERENCES:
patent: 3760969 (1973-09-01), Shimamoto et al.
patent: 4554125 (1985-11-01), Knapp

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