Binary blends of polyoxymethylene/ co-polyamide ( POM/ COPA) and ternary blends of poly-oxymethylene/ co-polyamide/ ethylene-vinyl ( POM/ COPA/ EVA) were prepared and the effect of COPA and EVA contents on properties of blends was investigated. 研究了聚甲醛供聚酰胺(POM/COPA)二元及聚甲醛供聚酰胺/乙烯-醋酸乙烯酯共聚物(POM/CA)PA/EVA)三元共混物,探讨了COPA、EVA用量对共混体系性能的影响。