C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 77/00 (2006.01) B32B 27/08 (2006.01) B32B 27/34 (2006.01) C08L 77/02 (2006.01) C08L 77/06 (2006.01)
Patent
CA 2323365
Super-miscible blends of nylon copolymers are provided as well as multilayered film structures made therefrom. A nylon composition is a substantially uniform blend of at least one semi-crystalline copolymer I and at least one semi-crystalline copolymer II, wherein the proportion by weight of each copolymer I and copolymer II. The nylon compositions are extremely uniform, and have only a single melting point rather than individual melting points of the component nylon copolymer parts. Coextruded films of a layer of this nylon composition with an olefin containing copolymer are suitable for use as barrier films, such as aroma barrier films, which have reduced curl.
L'invention concerne des mélanges ultra-miscibles de copolymères de nylon et des structures de film multicouches à base de ces mélanges. La composition de nylon considérée est un mélange sensiblement uniforme d'au moins un copolymère semi-cristallin I et d'au moins un copolymère semi-cristallin II, sachant que la proportion, en poids, des deux copolymères en question est telle que la composition a un point de fusion significatif unique. Ce type de composition est très uniforme, le point de fusion significatif unique remplaçant les points de fusion individuels propres aux différents constituants de copolymère de nylon. L'utilisation de films coextrudés comprenant une couche formée de la composition de nylon considérée et un polymère à base d'oléfine est adéquate pour constituer des films d'arrêt (par exemple, vis-à-vis des arômes) ayant un roulage réduit.
Khanna Yash P.
Kuhn William Paul
Puterbaugh Frank Herbert Jr.
Schena Martin James
Alliedsignal Inc.
Basf Aktiengesellschaft
Gowling Lafleur Henderson Llp
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