Gas tight polypropylene peel film

Details Gas tight polypropylene peel film Gas tight polypropylene peel film

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) B65D 65/40 (2006.01) B65D 75/58 (2006.01) B65D 75/00 (2006.01)

Patent

CA 2471950

The present invention is related to a coextruded multilayer polyolefin film being heat sealable and peelable onto polypropylene based substrates of at least 3 layers, comprising at least a peelable top layer, at least an intermediary layer and at least a base layer, characterised in that at least one of the intermediate layers comprises an easy lowable low melting polymer with a melt flow index at least equal or higher than the melt flow index of the base layer, said easy flowable polymer representing at least 60% by weight of the total weight of said multilayer polymer film.

La présente invention concerne un film de polyoléfine multicouche coextrudé thermosoudable et décollable sur des substrats à base de polypropylènes d'au moins 3 couches. Il comprend au moins une couche supérieure décollable, au moins une couche intermédiaire, et au moins une couche de base. Ce film se caractérise en ce que l'une au moins des couches intermédiaires comprend un polymère dont la basse température de fusion est facile à faire descendre et dont l'indice de fluidité est au moins égal à celui de la couche de base. Ce polymère facilement fluide représente au moins 60 % de la masse totale du film polymère multicouche de l'invention.

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