Shanghai Daoqin Plastics Co., Ltd.

         in production PVC film process in, 往往会出现一 像 is “鱼眼” 东西, that what is “鱼眼”呢? 谓 “鱼眼”, is 指PVC resin in processing can long similar 像鱼眼睛 斑点 or transparent hard 粒.

        鱼眼” generate main/primary causes large has below/following 两 方面:

        (1) resin separation quality distribution relatively is wide 泛, is separation quality high is especially easy 塑化, therefore easy generate “鱼眼”;

        (2) in PVC resin polymerization rear or is resin processing in mixed 入 根本无 method 塑化 杂质, 也会导致出现“鱼眼” 情况发生;

         is solution this issues can below/following types measures:

        (1) Raw Materials 处理, main/primary is in most 开始 时候 add large for PVC resin strong/high degree, increase 筛 数 amount, attention/notes material ring 境卫生, maintain Raw Materials 清洁避免 other mixed 入;

        (2)进一步改进捏 combined process, 实行同釜 material material separation separation add 入, need 严格遵守捏 combined add material related 程序. in addition, good PVC resin stabilizer, filling agent and other solid powder material cold time, ensure in increase agent add rear separation absorption uniform material lubricating. 整 捏 combined process in low temperature lower relatively long time inner 进行, this 样 话 for decrease/reduce “鱼眼” 情况出现;

        (3)进一步严格 control extrusion process, in extrusion processing equipment solid conditions lower, control extrusion temperature degree, screw speed and other processing process is promote material material separation 塑化 唯一手段. 总 说 in high temperature high speed lower control good screw cooling can reinforcement in function, this 样以 也会 decrease/reduce PVC resin “鱼眼” 情况发生.