B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/08 (2006.01) B29C 47/06 (2006.01) B29C 55/02 (2006.01) B29C 55/12 (2006.01) B32B 27/34 (2006.01)
Patent
CA 2403073
A multi-layer, thermoplastic film bi-axially oriented at a stretching ratio >= about 3.0:1 in the machine direction and at a stretching ratio >= about 6.0:1 in the transverse direction, which film comprises a layer a) comprising at least 50 wt. % of a crystalline or partially crystalline co-polyamide characterized by a Tg <= 100 ~C, and at least one outer heat-sealing layer b) comprising a polyolefin, said film being further characterized in that it has a % free shrink at 100 ~C <= 3 in each direction.
L'invention concerne un film thermoplastique multicouche biorienté selon un facteur d'étirage >= d'environ 3,0:1 dans le sens machine et un facteur d'étirage >= d'environ 6,0:1 dans le sens travers. Le film de l'invention comprend une couche a) comprenant au moins 50 % en poids d'un copolyamide cristallin ou partiellement cristallin, et se caractérise par un T¿g? <= 100 ·C, et au moins une couche de thermoscellage extérieure b) comprenant une polyoléfine. Le film se caractérise en outre en ce qu'il présente un pourcentage de rétrécissement naturel à 100 ·C <= 3 dans chaque sens.
Di Cesare Gregorio
Forloni Roberto
Longo Eugenio
Cryovac Inc.
Smart & Biggar
LandOfFree
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