【作者】 陈娟； 赵亚丽； 贾玉玺；

【Author】 Juan Chen;Yali Zhao;Yuxi Jia;Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education),Shandong University;

【机构】 山东大学材料液固结构演变与加工教育部重点实验室；

【摘要】 搪塑聚氯乙烯粉料流动性能对于搪塑成型至关重要,并影响最终制品的质量。文中通过改进混料工艺参数来提高PVC搪塑粉干混料的流动性能,主要包括热混过程中的加热温度以及保温时间和冷混过程中PVC糊树脂的用量以及冷混温度。通过SEM观察,发现在110℃下保温15min,增塑剂吸收效果最好;同时在冷混过程中加入适量PVC糊树脂,能显著减小PVC颗粒之间的摩擦力,从而保证最终得到流动性良好的粉料,其中糊树脂用量宜控制在15份左右。另外,实验发现,充分冷却后的粉料休止角更小,即流动性更好。更多还原

【Abstract】 The flowability of PVC slush powders is essential for slush molding and has direct influence on the performance and quality of final products. In this paper, the flowability of PVC dry blend was increased by improving mixing conditions including the heating temperature and holding time in hot blending process, and the amount of PVC paste resin and the temperature in cool blending process. The observation by means of SEM found that the excellent absorption effect of plasticizer was got at 110℃ for 15 minutes. In the meantime, the appropriate amount of PVC paste resin was necessarily added in cool blending process, which can decrease the friction dramatically to guarantee powders with good fluidity.更多还原