Oxygen scavenging film with good interply adhesion

Details Oxygen scavenging film with good interply adhesion Oxygen scavenging film with good interply adhesion

B - Operations, Transporting

32

B

B32B 27/32 (2006.01)

Patent

CA 2597389

An oxygen scavenger film includes a layer including a blend of an oxygen scavenger and a polymer selected from high density polyethylene, polypropylene or a propylene copolymer, and a sealant layer. Alternatively, both the oxygen scavenging layer and the sealant layer include a polymer selected from high density polyethylene, polypropylene or a propylene copolymer. The hot tack strength of these films is at least 2.0 Newtons/inch at 135~C, according to ASTM F 1921-98, measured with DTC instrumentation.

L'invention concerne un film désoxygénant qui comprend une couche contenant un mélange d'un désoxygénant et d'un polymère choisi parmi le polypropylène ou le polyéthylène haute densité ou un copolymère de propylène, ainsi qu'une couche de scellage. Dans une variante, la couche désoxygénante et la couche de scellage contiennent toutes deux un polymère choisi parmi le polypropylène ou le polyéthylène haute densité ou un copolymère de propylène. La tenue à chaud des soudures de ces films est supérieure ou égale à 2 Newtons/pouce à 135 °C, conformément à la norme ASTM F 1921-98, la mesure étant réalisée au moyen d'instruments DTC.

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