Metallized composite film structure and method

Details Metallized composite film structure and method Metallized composite film structure and method

B - Operations, Transporting

32

B

B32B 15/08 (2006.01)

Patent

CA 2205402

A metallized film combination comprising an oriented polypropylene substrate layer, at least one surface of which having a coating of a vinyl alcohol homopolymer or copolymer hydrolyzed to at least 95 % at a pH of greater than 5.0, said coating having a metal layer thereon. The high pH PVOH hydrolysis conditions provide a metallized product of high metal adhesion and good water and oxygen barrier properties.

La présente invention concerne un film composite métallisé comportant une couche de substrat de polypropylène orienté, dont au moins une surface porte un revêtement d'un homopolymère ou d'un copolymère d'alcool vinylique, hydrolysé à 95 % minimum à un pH supérieur à 5,0, ledit revêtement étant lui-même revêtu d'une couche métallique. Les conditions d'hydrolyse à l'alcool polynivylique (PVOH) à pH élevé assurent la formation d'un produit métallisé qui présente une caractéristique de forte adhésion métallique ainsi que de bonnes propriétés de barrière contre l'eau et l'oxygène.

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