【摘要】 微孔塑料的成型方法主要包括间歇成型法、连续挤出成型法、注射成型法和相分离法等,并且各有优缺点。其中,连续挤出成型法及注射成型法适合工业化生产。微孔塑料的成型过程包括聚合物/气体均相体系的形成、气泡成核和气泡长大及定型高的三个步骤,与常规泡沫塑料相比较,其加工过程的要求非常高,必须有高的气体浓度、高的成核速率、成核密度和短的长大定型时间。更多还原

【Abstract】 Processing technology of microcellular plastics includes batch microcellular foaming,extruding,injection and phase separation,each has advantages and disadvantages. Thereinto,the extruding and injection are suitable for industrialization.The forming of microcellular plastics consists of three key steps:forming of homogeneous gas/polymer system,nucleation and growing and shaping of gas bubbles.Compared with conventional foam plastics,the processing of microcellualr plastics requires high gas concentration,great nucleation ratio and nucleation density and short growing and shaping time.更多还原