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滴塑布印花浆的组成和过程

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滴塑布印花浆的组成和过程

发布日期:2017-04-14 15:36 来源:http://ccsiip.com 点击:

  滴塑布印花浆其实质是PVC增塑糊,是聚氯乙烯糊树脂悬浮于液态增塑剂中的流体混合物。由于聚氯乙烯糊树脂生产工艺不同性质上也有所差别,PVC生产工艺主要有:乳液法、种子乳液法、微悬浮法、种子微悬浮法及掺混法。可选用天津化工厂、上海天原化工厂采用种子乳液法生产的PVC糊树脂(聚合度为460或1202的产品)。当使用悬浮法聚氯乙烯糊树脂制糊时工艺较复杂,由于悬浮法聚氯乙烯树脂颗粒较粗,常温条件下与增塑剂混合不能成糊,需采用冲糊工艺,冲糊工艺的过程是:先用少量的悬浮法聚氯乙烯树脂与少量的增塑剂混合,再加入大量的经过预先加热到一定温度的热增塑剂,在加入增塑剂的同时迅速搅拌得到粘稠的糊状物。待糊冷却后按配方加入树脂和其它配合剂,搅拌成所需的糊状胶料。增塑剂是软聚氯乙烯塑料中对物理机械性能影响最大的塑料助剂,因此增塑剂的选择对聚氯乙烯糊的加工应用显得尤为重要。所以,滴塑布印花浆的配方可简可繁。

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