GRANULADOS E OU PASTILHAS PROCESSO PARA OBTENCAO DE GRANULADOS E PASTILHAS E ARTIGOS CONFORMADOS OBTIDOS POR INJECAO EXTRUSAO OU PRENSAGEM DE COMPOSICOES A BASE DE POLIAMIDA

摘要

Masterbatches useful for lightweight polyamide molding or extrusion comprise polyamide, a pore-forming agent and a fusible binder that is compatible with the polyamide. Admixture of the masterbatch and granular polyamide polymer results in a polyamide composition which can be molded or extruded into a product having increased homogeneity and expansion uniformity.