Back to results
US 4,818,577 AGranted
Synthetic liner capable of resisting chemical attack and high temperature
AssigneeMinnesota Mining and Manufacturing Company
InventorDaivd T. Ou-Yang
Life of this patent
Estimating the term…
Abstract
A liner, suitable for use with caps for containers, comprising a layer of compressible polymeric foam, a layer of adhesive in contact with and coextensive with said foam layer, and a layer of polymeric film in contact with and coextensive with said layer of adhesive. The liner shows good chemical resistance, good resistance to high temperatures, and good impermeability to gases.
Claims14
Liner suitable for a cap for a container consisting of:
- (a) a layer of compressible polymeric foam, said layer of foam comprising a polymer or copolymer of olefin,
- (b) a layer of adhesive in contact with and coextensive with said layer of foam, and
- (c) a layer of polymeric film in contact with and coextensive with said layer of adhesive, said layer of film being made of a material selected from the group consisting of crystalline and semicrystalline polyesters, silicones, polytetrafluoroethylenes, and polyimides.
Dependencies are inferred from the claim text.