1·At present, in continuous extrusion processing of micro cellular plastics, the two pressure drop cell nucleation apparatus of the nozzle and gear pump are used.
在连续微孔挤出加工中，当今采用喷嘴和齿轮泵两种快速压降成核装置。
2·In the foam process of cellular plastics, bubble nucleation has decisive effect on cell density and cell distribution, so it is the crucial factor to control the foam quality.
前人对泡沫塑料气泡成核过程的研究基本上都是以经典成核理论为基础进行的。