【摘要】 微孔物理发泡因其制品的诸多优点而越来越受到人们的重视,目前人们已逐渐开始将研究重点从发泡成核机理研究转到加工过程中诸多因素的研究,以求更好的实现对泡孔尺寸、分布及密度的控制。针对微孔塑料挤出的全过程,对影响气泡成核、成长及泡孔密度的诸多因素如预定型压力、熔体温度、粘度、气泡界面张力、定型卷取速度。冷却水温等进行了全面分析,从而使微孔塑料的生产更趋合理化。更多还原

【Abstract】 More and more emphasis has been put on the microcellular physical foaming for its many advantages. So far, the emphasis of study in this field has transformed from cell nucleation and growth theory to many factors affecting the extrusion system,so as to better control the cell density, cell distribution and cell size. Many factors affecting cell nucle ation and cell growth among the extrusion process such as preshaping pressure, melt temperature, melt viscosity, interfa cial tension,take-up speed and the temperature of cooling water were systematically analyzed thus making the produc tion of microcellular plastics more rational.更多还原