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US 5,500,265 AGranted
Peelable film structure
AssigneeMobil Oil Corporation
InventorsBenoit Ambroise, Maurice Petitjean
Life of this patent
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Abstract
A peelable film comprising: (A) a core layer comprising an olefin polymer; (B) a skin layer on at least one surface of the core layer, the skin layer comprising: (i) a blend of a butylene polymer with another olefin polymer; or (ii) a polymer of butylene and at least one other olefin; and (C) a coating layer on the skin layer.
Claims22
A peelable film comprising:
- (a) a core layer comprising an olefin polymer;
- (b) a skin layer on at least one surface of the core layer, consisting essentially of:
- (i) a blend of a butylene polymer with another olefin polymer;
- or
- (ii) a polymer of butylene with one other olefin;
- and
- (c) a coating layer comprising a heat-sealable polymer on the skin layer, said peelable film being peelable between said coating layer and said skin layer.
4 more elements
A method of making a peelable film comprising coextruding a core layer comprising an olefin polymer with a skin layer consisting essentially of either:
- (i) a blend of a butylene polymer with another olefin polymer;
- or (ii) a polymer of butylene with one other olefin;
- and coating said skin layer with a coating layer comprising a heat-sealable polymer, said peelable film being peelable between said coating layer and said skin layer.
Dependencies are inferred from the claim text.