C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/199 (2006.01) B32B 27/32 (2006.01) B32B 27/36 (2006.01) B65D 65/40 (2006.01) C08J 5/18 (2006.01)
Patent
CA 2172384
Monolayer and multilayer polyester film which comprises at least one layer of a heat-sealing polyester which is crystallizable to the extent of allowing mixtures thereof to be made with other crystallizable polyesters for crystallization without sticking is disclosed. The heat-sealing polyester is polyethylene terephthalate modified with about 7-15 ml. % cyclohexanedimethanol. In multilayered films, another layer of readily crystallizable polyethylene terephthlate is used
L'invention se rapporte à un film polyester monocouche et multicouche comprenant au moins une couche d'un polyester thermoscellable que l'on peut cristalliser jusqu'au point permettant de le mélanger à d'autres polyesters cristallisables afin d'obtenir une cristallisation dépourvue de collant. Le polyester thermoscellable est du polyéthylène téréphtalate modifié avec environ 7 à 15 % en moles de cyclohexanediméthanol. Dans les films multicouches, on utilise une autre couche de polyéthylène téréphtalate facilement cristallisable.
Bell Emily Tedrow
Mercer James Wilson Jr.
Shih Wayne Keng
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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