China Plastic Molding

pet molding solution

PET moulding should be pay attention to several important points.we should know clearly about character of PET.
The following are the points of the PET moulding solution:
1.The hygroscopicity of PET is more easier ,have a good sense of water under high temperature ,so we should
make it dry before produce production.
2.Crystallinity of the PET is reduce when the molecular weight increased.
3.The PET production will remain innerstress ,so when the products is ready also need after treatment.
4.When put some recycleplastic material,should dry it enough,and no more than 20%.
5.The temperature have no big influence to PET melt viscosity
6.Melting point of the PET is obviously,and the temperature is 270~290℃,when the temperature is higher than 300℃
will be degraded.
7.Due to the speed of solidified of PET,should adopted high speed injection ,make sure the melt could fully of cavity.
8.The gate of injection should use tunnel gate and point gate ,and the gate should be biger to avoid the high pressure.
Post by zoe
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