Shanghai Daoqin Plastics Co., Ltd.

due to polyethylene (PE) is crystallization polymer, its melt crystallization product also need absorption separation hot amount, selection machine temperature degree usually high melting point degree. mold temperature degree for products crystallization has relatively large effect/influence, temperature degree high, melt cooling speed degree slow, products crystallization degree high, products strong/high degree high, is products shrinkage rate temperature degree increase high increase large, easy generate internal stress and deformation, therefore high low density different mold temperature degree, usually LDPE mold temperature degree in 30~45 ℃,而HDPE versus again improve/increase 10~20 ℃. injection pressure main/primary is flow 状况, generally polyethylene (PE) in melt lower tool has relatively good flow property, therefore remove thin fine long products outer, amount selection low injection pressure, generally in 60~80MPa.