聚丙烯旋转成型浆液料粘结和干燥工艺研究

Study on Sticking and Drying Process of Aqueous Slurry of Powder PP for Rotational Moulding

研究了以粉状聚丙烯为原料、以羧甲基纤维素 (CMC)为稳定剂的旋转成型用水性浆液料在加热过程中的粘结和干燥行为。实验结果表明 ,随着加热温度的上升 ,浆液料的不流挂时间tA 和干燥时间tB 都下降。不流挂时间tA 控制着干燥时间tB 的长短。在旋转成型工艺的烘干粘结预制段 ,提高生产效率的关键是缩短流挂阶段的时间。

Behavior of the sticking and drying of the aqueous slurry of powder polypropylene (PP) using sodium carboxymethylcellulose (CMC) as a suspension stabilizer during heating process in rotational moulding was investigated. Experimental results show that the non-flowing time t A and the drying time t B of the slurry decrease with the rise of the heating temperature and that the variation of the non-flowing time t A controls that of the drying time t B . It has been concluded that it is very important to shorten the time of the flowing stage during the drying-sticking prefabricating process in the rotational moulding and that the promotion of the efficiency of the production can be achieved by using two-stage heating method significantly.