Microcellular foam of thermoplastic resin prepared with die...

Details Microcellular foam of thermoplastic resin prepared with die... Microcellular foam of thermoplastic resin prepared with die...

C - Chemistry, Metallurgy

08

J

C08J 9/18 (2006.01) B29C 67/20 (2006.01)

Patent

CA 2628473

The present invention relates to a microcellular foam of a thermoplastic resin and a method for preparing the same, and more particularly to a microcellular foam comprising a skin layer having a porosity of below 5% and a core layer having a porosity of at least 5%, wherein the thickness of the skin layer accounts for 5 to 50% of the entire foam, and a method for preparing the same. The microcellular foam of the present invention is advantageous in that it has a thicker skin layer and smaller and uniform micropores in the core layer, compared with conventional microcellular foams, while having mechanical properties comparable to those of conventional non-foamed sheets.

La présente invention concerne une mousse microcellulaire d'une résine thermoplastique et son procédé d'élaboration et, plus spécifiquement, une mousse microcellulaire contenant une couche de peau à porosité inférieure à 5 % et une couche centrale à porosité d'au moins 5 %, l'épaisseur de la couche de peau représentant 5 à 50 % de la totalité de la mousse, ainsi qu'un procédé de préparation de ladite mousse. Cette mousse microcellulaire présente des avantages du fait qu'elle a une couche de peau plus épaisse et des micropores plus petits et uniformes dans la couche centrale, en comparaison aux mousses microcellulaires traditionnelles, tandis qu'elle possède des propriétés mécaniques comparables à celles des feuilles sans mousse traditionnelles.

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