Improved pvc building trim

Details Improved pvc building trim Improved pvc building trim

C - Chemistry, Metallurgy

08

L

C08L 27/06 (2006.01) B29C 47/88 (2006.01) C08J 5/00 (2006.01) E04C 2/20 (2006.01)

Patent

CA 2186944

The material is an extruded high impact, exterior PVC material comprising no more than 80 percent by weight of PVC resin and about 7 percent by weight of filler, said material being permanently bendable and has an average coefficient of thermal expansion of about 2.7 x 10 in/in degree Fahrenheit over the range of ambient temperatures from minus 4 to plus 86 degrees Fahrenheit. A unique method of making the material extrudes it at lower temperatures than usually utilized. The material, formed in a strip is cooled to limited temperatures immediately before it is coiled.

Le matériau de l'invention est un matériau en PVC extrudé pour l'extérieur, résistant aux chocs, ne comprenant pas plus de 80 pour-cent en poids de résine PVC et environ 7 pour-cent en poids de charge, ledit matériau étant cintrable de manière permanente et ayant un coefficient moyen de dilatation thermique d'environ 2,7 x 10 pouce/pouce/degré Fahrenheit sur une plage de températures ambiantes allant de moins 4 à plus 86 degrés Fahrenheit. L'invention décrit un procédé unique de fabrication dudit matériau par extrusion à des températures inférieures à celles normalement utilisées. Le matériau, mis en forme de bande, est refroidi à des températures limitées immédiatement avant d'être enroulé.

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