초록 ▼

This invention pertains to the use of polymer blends in making multiple layer films. In some layers, the elastomer or ethylene-based copolymer is blended with polypropylene, and in some layers, with polyethylene. Typical films have two to five layers. In multilayer films, at least one layer of a ble

This invention pertains to the use of polymer blends in making multiple layer films. In some layers, the elastomer or ethylene-based copolymer is blended with polypropylene, and in some layers, with polyethylene. Typical films have two to five layers. In multilayer films, at least one layer of a blend of polyethylene, preferably high density polyethylene, with elastomer and/or ethylene-based copolymers. Another layer is polypropylene blended with elastomers and/or ethylene-based copolymers. The films may have as few as two layers, one each having polypropylene and polyethylene, preferably high density polyethylene. Additional layers may be added to the two or three layer films taught herein, for variety of purposes.

대표청구항 ▼

A multiple layer film comprising: (a) a first layer, the composition of said first layer being a blend of (i) polypropylene, (ii) a second component, said second component providing elastomeric properties, and being selected from the group consisting of ethylene butene-1 copolymers and ethylene prop

A multiple layer film comprising: (a) a first layer, the composition of said first layer being a blend of (i) polypropylene, (ii) a second component, said second component providing elastomeric properties, and being selected from the group consisting of ethylene butene-1 copolymers and ethylene propylene copolymers, and (iii) a third component, the composition of said third component being a modifier having elastomeric properties the composition of said third component being different from the composition of said second component; and (b) a second layer having two surfaces, and being adhered, on one of said surfaces to said first layer, the composition of said second layer being a blend of (i) polyethylene and (ii) a second component, said second component being a modifier providing elastomeric properties representative of elastomers.