Heat-shrinkable multi-layer film

Details Heat-shrinkable multi-layer film Heat-shrinkable multi-layer film

B - Operations, Transporting

32

B

B32B 27/06 (2006.01) B32B 27/32 (2006.01) B32B 31/30 (1995.01)

Patent

CA 2235139

A heat-shrinkable multi-layer film endowed with good optical and mechanical properties, improved shrinkability and sealability comprising a core layer consisting essentially of a blend of ethylene-propylene copolymer and/or ethylene-propylene-butene-1 terpolymer with polypropylene homopolymer, and two outer layers each comprising a major proportion of a polymeric material selected from the group consisting of ethylene-propylene-butene-1 terpolymers, ethylene-propylene copolymers and blends thereof.

L'invention concerne un film multicouche thermorétractible, doté de bonnes propriétés optiques et mécaniques, d'une rétractibilité et étanchéité améliorées, qui comprend une couche centrale consistant essentiellement en un mélange d'un copolymère d'éthylène-propylène et/ou d'un terpolymère d'éthylène-propylène-butène-1, avec un homopolymère de polypropylène, et deux couches extérieures comprenant chacune une proportion majeure d'un matériau polymère choisi dans le groupe constitué par des terpolymères d'éthylène-propylène-butène-1, des copolymères d'éthylène-propylène et des mélanges de ceux-ci.

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