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US 4,764,404 AGranted
Films having a polypropylene blend layer
AssigneeAmerican National Can Company
InventorsRoger P. Genske, Yong J. Kim
Life of this patent
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Abstract
This invention pertains to blends of a first component of a polypropylene, a second component of an ethylene-based copolymer, and a third component which provides some properties representative of elastomeric polymers. The blends are useful in making single and multiple layer sheet structures. The invention further contemplates packages made from sheet structures incorporating layers of the blends therein.
Claims19
A mulitple layer sheet structure, comprising:
- (a) a first layer of metal foil having two opposing surfaces on opposing sides of said foil layer;
- (b) a second layer of an abuse resistant polymer adhered to one said surface on one said side of said foil;
- and
- (c) a third layer adhered to said sheet structure on the other said side of said foil layer, the composition of said third layer being a blend of (i) as a first component, a polypropylene polymer, (ii) as a second component, a polymeric composition providing elastomeric properties, and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third component, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
1 more element
A multiple layer sheet structure, comprising:
- (a) a first layer of a polyamide having two opposing surfaces on opposing sides of said polyamide layer;
- (b) a second layer of an ethylene vinyl alcohol copolymer having two opposing surfaces, one said surface of said second layer being on one said surface on one said side of said first layer;
- (c) a third layer of a polyamide on the other said surface of said second layer opposite said first layer;
- and
- (d) a fourth layer adhered in said sheet structure to the other said side of said first layer, the composition of said fourth layer being a blend of (i) as a first component, a polypropylene, (ii) as a second component, a polymeric composition providing elastomeric properties and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third component, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
2 more elements
A multiple layer sheet structure comprising:
- (a) a first layer of a barrier material having two opposing surfaces on opposing sides of said first layer, the composition of said first layer being a vinylidene chloride copolymer;
- (b) a second layer of an abuse resistant polymer adhered to one said surface on one said side of said first layer;
- and
- (c) a third layer adhered, in said sheet structure, on the other said side of said first layer, the composition of said third layer being a blend of (i) a first component of polypropylene, (ii) as a second component, a polymeric composition providing elastomeric properties, and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third componet, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
1 more element
Dependencies are inferred from the claim text.