B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/20 (2006.01) B29C 47/06 (2006.01) B32B 27/36 (2006.01)
Patent
CA 2620181
A method of forming a multilayer film (401, 402) is disclosed, comprising coextruding a first layer (101, 102) comprising a weatherable composition, and a second layer (201, 202) comprising a polycarbonate composition comprising a visual effect filler, wherein the first (101, 102) and second (201, 202) layers are formed by flowing each of the weatherable composition and polycarbonate composition through separate flow channels (100, 200, 300) in a multi-manifold coextrusion die. The shear stress during extrusion on the polycarbonate composition is greater than or equal to 40 kilo-Pascals.
L'invention concerne un procédé de formage d'un film multicouche, procédé comprenant la coextrusion d'une première couche renfermant une composition résistant aux intempéries, et d'une seconde couche renfermant une composition de polycarbonate renfermant une charge à effet visuel, caractérisé en ce que la première et la seconde couches sont formées par écoulement, respectivement, de la composition résistant aux intempéries et de la composition de polycarbonate, à travers des canaux d'écoulement séparés dans une filière de coextrusion à collecteur multiple. La contrainte de cisaillement durant l'extrusion de la composition de polycarbonate est supérieure ou égale à 40 kilo-pascals.
Asthana Himanshu
Moitra Aniruddha
Rosendale David
Company General Electric
Craig Wilson And Company
LandOfFree
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