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US 6,645,609 B2Granted
Peelable, sealable polyolefinic multilayered film and its use as a packaging film
AssigneeWolff Walsrode AG
InventorsBernd Sperlich, Helmut Wagner, Willi Schwarz, Hans Wunderlich
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Abstract
Described is a stretched multilayered film comprising: (a) a polyolefin layer; and (b) at least one peelable outer layer. Each peelable outer layer (b) independently is 0.5 to 5 μm thick, comprises a copolymer of vinyl acetate and ethylene, and has a vinyl acetate proportion of from 3 to 30 wt. %, based on the weight of the peelable outer layer (b). Also described is a method of using the multilayered film as a packaging film.
Claims10
A stretched multilayered film consisting essentially of:
- (a) a core layer which consists of Polypropylene homopolymer, and
- (b) a peelable outer layer, and
- (i) a further outer layer selected from the group consisting of
- (b′) a separate peelable outer layer, and
- (c) a heat-sealable, non-peelable outer layer, wherein each peelable outer layer (b) and (b′) independently 0.5 to 5 μm thick, comprises a copolymer of vinyl acetate and ethylene, and has a vinyl acetate proportion of from 3 to 30 wt. %, based on the weight of each of peelable outer layer (b) and (b′), and said polypropylene layer (a) is interposed between said peelable outer layer (b) and said further outer layer (i).
2 more elements
Dependencies are inferred from the claim text.