Contamination preventing sealant films and products thereof

Details Contamination preventing sealant films and products thereof Contamination preventing sealant films and products thereof

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) A61J 1/00 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2162123

A contamination-proof sealant film mainly used in the medical field, which is provided at least with the first layer as the innermost layer comprising at least one resin selected from the group consisting of linear low-density polyethylene, low-density polyethlene, polypropylene and polybutene-1, the second layer as an adhesive layer comprising non-crystalling polyolefin, adhesive polyolefin or an ethylene-vinyl acetate copolymer, and the third layer consisting of an ethylene-vinyl alcohol copolymer. The third layer functions as a barrier for preventing the contaminant from migrating from outside the third layer toward the first layer as the innermost layer.

Une pellicule anti-contamination étanche utilisable principalement dans le domaine médical comporte plusieurs couches. La première couche au moins, placée la plus à l'intérieur, se compose d'une résine appartenant au groupe constitué par un polyéthylène linéaire basse densité, un polyéthylène basse densité, un polypropylène et un polybutène-1. La seconde couche, qui sert de couche adhésive, se compose de polyoléfine non cristalline, de polyoléfine adhésive, ou d'un copolymère d'acétate d'éthylène-vinyle. La troisième couche, en copolymère d'alcool éthylène-vinylique, constitue une barrière contre la migration de contaminants depuis l'extérieur de la troisième couche vers la première couche située la plus à l'intérieur.

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