Process for the production of light cellular plastic with...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 9/06 (2006.01) B29C 44/08 (2006.01)

Patent

CA 2171285

A process for the production of products of light cellular plastic with closed cells from a plastic composition containing chemical blowing agent and, optionally, other process-regulative substances and additives, where the plastic composition is processed (kneaded) mechanically in a plastic processing machine to a well homogenized, melted plastic compound, and that the plastic compound is then pressed into a closed cavity, at a temperature above the decomposition temperature for the chemical blowing agent in the plastic compound, in combination with possible decomposition regulative additives.

L'invention se rapporte à un procédé pour la fabrication de produits en plastique alvéolaire léger avec alvéoles fermées, à partir d'une composition plastique contenant un agent gonflant et éventuellement d'autres substances et additifs de régulation du processus de fabrication. Dans ce procédé, la composition plastique est transformée mécaniquement (malaxée) dans une machine de travail du plastique en un composé plastique à l'état fondu bien homogénéisé, lequel est ensuite pressé dans une cavité fermée, à une température supérieure à la température de décomposition de l'agent gonflant du composé plastique, éventuellement combiné à des additifs de régulation de la décomposition.

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