Sealable film

Details Sealable film Sealable film

B - Operations, Transporting

32

B

B32B 7/06 (2006.01) B32B 7/12 (2006.01) B32B 27/06 (2006.01) B32B 27/08 (2006.01) B32B 27/30 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2278644

A sealable film comprising: (a) an inner layer comprising an olefin polymer; (b) a sealing layer; and (c) a separable layer positioned between the inner layer and the sealing layer, the separable layer comprising (1) ethylene- propylene block copolymer or (2) a blend of polyethylene and another olefin which is incompatible with the polyethylene, specifically either (i) polypropylene homopolymer or (ii) ethylene-propylene block copolymer. Methods of making the sealable film are described.

L'invention concerne un film pouvant être rendu étanche qui comprend a) une couche interne composée d'un polymère oléfinique; b) une couche d'étanchéité; et c) une couche séparable placée entre la couche interne et la couche d'étanchéité et contenant 1) un copolymère séquencé d'éthylène-propylène ou 2) un mélange de polyéthylène et d'une autre oléfine incompatible avec le polyéthylène, à savoir i) un homopolymère de propylène ou ii) un copolymère séquencé d'éthylène-propylène. L'invention concerne également des procédés de fabrication dudit film étanche.

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