Broad sealing multi-layered opp films which yield hermetic...

Details Broad sealing multi-layered opp films which yield hermetic... Broad sealing multi-layered opp films which yield hermetic...

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) B32B 15/08 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2043415

F-5794-L ABSTRACT A multilayer film is hermetically heat sealable over a broad temperature range. In one embodiment, a heat sealable layer is provided to a polypropylene core layer. The heat sealable layer comprises an ethylene-propylene copolymer and/or an ethylene-propylene-butene terpolymer with an inorganic antiblock agent having a particle size of at least .8 micron and at least about 1000 ppm of a fatty acid amide, the layer having a thickness of at least about 10-25% of the total film thickness. A metal-receiving layer may be provided to a surface of the core layer opposite the heat-sealable layer and the film may be metallized.

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