B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/36 (2006.01) B32B 15/08 (2006.01)
Patent
CA 2171201
A polymeric film has a substrate layer (1) with a heat-sealable layer (2) on at least one surface (3) thereof. The substrate layer contains a blend of 20 to 60 mole % of a first polyester comprising ethylene terephthalate as the main repeating unit and 40 to 80 mole % of a second polyester comprising butylene terephthalate as the main repeating unit. The heat-sealable layer contains a third polyester which has a melting point less than that of the first and second polyesters. The polymeric film is suitable for laminating to metal sheet (4) for can production.
Un film polymère a un substrat (1) ainsi qu'une couche thermo-scellable (2) sur au moins une surface (3) du substrat. Le substrat contient un mélange de 20 à 60 moles % d'un premier polyester comprenant un téréphtalate d'éthylène en tant qu'unité principale de répétition, et de 40 à 80 moles % d'un second polyester comprenant un téréphtalate de butylène en tant qu'unité principale de répétition. La couche thermo-scellable contient un troisième polyester qui a un point de fusion inférieur à celui des premier et second polyesters. Le film polymère est approprié pour être laminé sur une tôle métallique (4) pour la production de boîtes métalliques à conserves.
Berry Michael Richard
Donnellan John Paul
Dimock Stratton Llp
Dupont Teijin Films U.s. Limited Partnership
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