B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/30 (2006.01) C08J 7/04 (2006.01)
Patent
CA 2202285
A heat sealable thermoplastic film is coated on at least one side with an acrylonitrile-containing coating containing from 25 wt.% to about 80 wt.% acrylonitrile. More specifically, the film is coated on the inside with a polymeric coating comprising (i) from 25 to 50 wt.% of a nitrile such as acrylonitrile, (ii) from 40 to 75 wt.% of a monomer selected from the group consisting of an alkyl acrylate or 1,3-butadiene, and (iii) about 1 to 10 wt.% of a monomer selected from the group consisting of an ethylenically unsaturated carboxylic acid or sulfoethyl methacrylate, the coating having a calculated glass transition temperature (Tg) ranging from about 10 ~C to less than about 50 ~C. The outside of the film is coated with an acrylic coating composition which can contain from 0 to about 80 wt.% acrylonitrile.
On applique, sur au moins un côté d'un film thermoplastique thermosoudable, un revêtement contenant de l'acrylnitrile en une teneur comprise entre 25 % et environ 80 % en poids. Le film est plus particulièrement doté d'un revêtement interne polymère comprenant (i) de 25 à 50 % en poids d'un nitrile tel que l'acrylnitrile, (ii) de 40 à 75 % en poids d'un monomère choisi entre un acrylate d'alkyle et 1,3-butadiène, et (iii) environ 1 à 10 % en poids d'un monomère choisi entre un méthacrylate de sulfoéthyle et un acide carboxylique éthyléniquement insaturé. Ce revêtement présente une température de transition vitreuse calculée (T¿g?) comprise entre environ 10 ~C et moins de 50 ~C environ. On applique à l'extérieur du film une composition de revêtement acrylique pouvant contenir de 0 à environ 80 % en poids d'acrylnitrile.
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
LandOfFree
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