Films of polypropylene blends and polyethylene blends and articles made therewith
OwnerRoger P. Genske, Yong J. Kim +4inventors
InventorsRoger P. Genske, Yong J. Kim, Russell P. Gehrke, Richard E. Johnson, Jr., R. Daniel Webster, Leonard F. Czuba
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Abstract
Novel films are disclosed which contain blends of ethylene-based copolymers or other elastomers with polypropylene and polyethylene. Typical films have two-five layers wherein at least one layer is a blend of high density polyethylene with an ethylene-based copolymer or another elastomer and has additional layers of polypropylene blended with an ethylene-based copolymer or another elastomer.
Claims34
A multiple layer film, comprising:
- (a) first and third layers each of said first and third layers comprising compositions of (i) polypropylene polymer chosen from the group consisting of polypropylene homopolymer and polypropylene copolymer and (ii), as a second component, a polymer composition chosen from the group consisting of ethylene butene-1 copolymers and ethylene propylene copolymers;
- and
- (b) a second layer, the composition of said second layer comprising polyethylene;
- said second layer being between said first and third layers.
A multiple layer film of claim 9 or 21 wherein a fifth layer is adhered to said fourth layer, the composition of said fifth layer comprising polypropylene.
A multiple layer film as in any one of claims 3-7, 21 or 22 wherein the corresponding second components in adjacent layers are different materials.
A multiple layer film comprising:
- (a) a first layer, said first layer comprising a composition of (i) polypropylene polymer chosen from the group consisting of polypropylene homopolymer and polypropylene copolymer and (ii), as a second component, a polymer composition chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer;
- (b) a second layer, the composition of said second layer comprising a polyethylene;
- and
- (c) a third layer, the composition of said third layer comprising a polypropylene composition,
- said second layer being disposed between said first and third layers.
A multiple layer film comprising:
- (a) a first layer comprising a polypropylene composition;
- (b) a second layer, the composition of said second layer comprising (i) polyethylene polymer chosen from the group consisting of polyethylene homopolymer and polyethylene copolymer and (ii), as a second component, a polymer composition providing elastomeric properties;
- and
- (c) a third layer comprising a polypropylene composition, said second layer being disposed between said first and third layers.
Dependencies are inferred from the claim text.