Thermoformable multi-layer polypropylene foam sheet

Details Thermoformable multi-layer polypropylene foam sheet Thermoformable multi-layer polypropylene foam sheet

B - Operations, Transporting

32

B

B32B 5/32 (2006.01)

Patent

CA 2346804

A thermoformable, multilayer, co-extruded sheet comprising at least two separate foam polypropylene layers obtained by chemical foaming of two polypropylene resins having different flexural modulus, a "high modulus" polypropylene and a "low modulus" polypropylene. The presence of two different foam layers of polypropylene of different modulus allows obtaining a thermoformable sheet with the desired balance between thermoformability and stiffness.

Cette feuille multicouche, thermoformable, co-extrudée, comprend au moins deux couches séparées de mousse polypropylène, obtenues par moussage chimique de deux résines polypropylène possédant des modules d'élasticité en flexion différents, un polypropylène possédant un module d'élasticité élevé, et l'autre un module d'élasticité faible. La présence de ces deux couches de mousse différentes à polypropylène possédant dans chaque couche un module d'élasticité différent, permet d'obtenir une feuille thermoformable possédant l'équilibre recherché entre thermoformabilité et rigidité.

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