Polyester films and methods for marking the same

F - Mech Eng,Light,Heat,Weapons – 16 – B

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F16B 4/00 (2006.01) B32B 27/06 (2006.01) B65D 30/02 (2006.01)

Patent

CA 2562435

The present invention is directed to blended monolayer films and multilayer films having odor barrier properties, methods of making such films, and bags made from such films. Blended monolayer films include blends of non-elastic polyesters and blends of non-elastic polyesters, polyester thermoplastic elastomers, polyolefins, or combinations thereof. Multilayer thermoplastic films include a plurality of layers of film. The plurality of layers of film includes at least one non-elastic polyester layer of film and at least one additional layer of film. The one additional layers of film can be polyester thermoplastic elastomer layers, polyolefin layers, nylon layers, and combinations thereof. Blended monolayer films and multilayer films are a substantial odor barrier for at least 3 days and have a gauge thickness of from about 0.00015 to about 0.01 inches.

La présente invention concerne des films monocouches mixtes et des films multicouches présentant des propriétés barrière contre les odeurs, des procédés de fabrication de ces films ainsi que des sacs constitués de ces films. Les films monocouches mixtes comprennent des mélanges de polyesters non élastiques et des mélanges de polyesters élastiques, des élastomères thermoplastiques de polyester, des polyoléfines ou des combinaisons de ces constituants. Les films thermoplastiques multicouches comprennent une pluralité de couches de film. Cette pluralité de couches de film inclut au moins une couche de film de polyester non élastique et au moins une couche de film supplémentaire. La ou les couches de film supplémentaires peuvent être des couches d'élastomère thermoplastique de polyester, des couches de polyoléfine, des couches de nylon et des combinaisons correspondantes. Les films monocouches mixtes et les films multicouches constituent une barrière contre les odeurs sensiblement efficace pendant au moins 3 jours et présentent une épaisseur de référence comprise entre environ 0,00015 et environ 0,01 pouce.

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