G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 1/04 (2006.01) B32B 27/36 (2006.01) G02B 5/30 (2006.01)
Patent
CA 2521545
A multilayer optical body having improved dimensional stability is disclosed. The optical body includes an optical film, such as an oriented multilayer optical film, and a dimensionally stable (warp-resistant) layer that includes a combination of i) polystyrene or a first polystyrene copolymer and ii) a second polystyrene copolymer or the layer includes a norbornene-based polymer. In addition, in specific implementations, the invention includes an intermediate layer between the optical film and the dimensionally stable layer. Methods of making the optical body are also disclosed.
L'invention porte sur un corps optique multicouche ayant une meilleure stabilité dimensionnelle. Le corps optique comprend un film optique tel qu'un film optique multicouche orienté et une couche aux dimensions stables (résistant à la déformation) qui comprend une combinaison de i) polystyrène ou d'un premier copolymère de polystyrène et ii) un second copolymère de polystyrène ou la couche comprend un polymère à base de norbornène. De plus, selon des formes d'exécutions spécifiques, l'invention comprend une couche intermédiaire entre le film optique et la couche aux dimensions stables. L'invention porte également sur des procédés de fabrication du corps optique.
Hamer Kevin M.
Hebrink Timothy J.
Rosell Barry S.
Strobel Joan M.
3m Innovative Properties Company
Smart & Biggar
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