Shanghai Daoqin Plastics Co., Ltd.

made as process in, 发现TPU injection molding transparent what to do? how to solution this type of issues, about/regarding this type of 情况, 鼎誉认 is TPU injection molding 时出现 this type of causes has 两, is process for, is raw materials 本身就 is transparent.

先说 pellets causes, has TPU材 material pellets is transparent, is material 做出 并不 transparent, is pelletizing pellets comparison small, but also is has water speed cooling, therefore pellets generally is transparent, is injection molding rear due to is slow cooling, but also injection molding parts thick degree large small 都不一定, therefore material transparent is very positive 常, therefore material need selection transparent degree high material, can light pellets transparent selection.

another if is injection molding process issues, that can can is injection molding temperature degree high, material also has to injection molding temperature degree, this 样做出 product is transparent, also has if material use front has dry, or mold temperature degree high and other and other, for transparent degree has effect/influence, is effect/influence 也不会太 large.

solution TPU injection molding transparent can 不妨试试 below/following methods:

1. in tpu胶粒 pellets in add nucleating agent.

nucleating agent in crystallization type polymer processing molding process in, can 代替晶核, make high poly material separation in nucleating agent upper long formed 晶体, due to add nucleating agent, tpu胶粒, PP保护 film melt in melting point can crystallization 晶核数 amount large increase, crystallization speed degree add fast, crystallization pellets micro fine 化, this 样晶体不 effect/influence film transparent property, from in improve/increase PE, PP film crystallization degree, improve/increase film strong/high degree meanwhile, improve/increase transparent degree.

nucleating agent separation has machine nucleating agent and machine nucleating agent large type. has machine nucleating agent has acid, acid and other, machine nucleating agent has slip powder, carbon acid and other. add amount is acid 钠0.25PHR, acid 0.4PHR, Na2CO30.2PHR, slip powder 0.05PHR. in HDPE in add 0.3-0.7% hard acid nucleating agent can make HDPE film transparent degree 由67% improve/increase to 73.5%.

2. in tpu胶粒 pellets in add 0.5-1% 均质油.

this type of 均质油 can 同PVC, PE, PP, PU, PC, PS, HIPS, ABS, AAS, PMMA, PET, PBT and other has good versus property, can use 直接颜 material powder agent formed uniform transparent property good has color plastics, 且均质油无毒, in 50-70℃ lower high speed 搅拌就 can used for molding processing.