Calculation formula of nucleation time and density inside the die of the continuous extrusion of microcellular foam were deduced by means of finite difference method.
利用有限差分法推导出气体 /聚合物熔体体系在微孔塑料连续挤出成型过程中口模中的成核密度和成核时间的迭代计算公式 ,从而为控制微孔塑料成型过程中泡孔的大小和密度提供了理论基