B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 7/02 (2006.01) B32B 27/00 (2006.01) B44F 1/14 (2006.01) G02B 5/28 (2006.01)
Patent
CA 2686240
A transparent thermoplastic resinous film of at least 10 generally parallel layers in which the contiguous adjacent layers are of diverse transparent thermoplastic material differing in refractive index by at least about 0.03, the planarity of the film being modified so as to reflect non-specular color. Modification of the film can be achieved by co-extruding an outer thermoplastic layer with the multilayer film which outer thermoplastic layer has a solidification temperature lower than the remaining film layers, cooling the film to modify the planarity thereof.
L'invention concerne un film résineux thermoplastique transparent comprenant au moins 10 couches globalement parallèles. Les couches adjacentes contiguës présentent divers matériaux thermoplastiques transparents dont l'indice de réfraction diffère d'au moins environ 0,03, la planarité du film étant modifiée de manière à réfléchir une couleur non spéculaire. La modification du film peut être obtenue au moyen de la co-extrusion d'une couche thermoplastique externe avec le film multicouche, la couche thermoplastique externe présentant une température de solidification inférieure aux autres couches de film, refroidissant le film afin de modifier sa planarité.
Basf Corporation
Sim & Mcburney
LandOfFree
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