See if you use pure PP material or modified PP material. Pure PP material can be directly injected. It is recommended to bake materials with high surface appearance. If the modified PP material is used, it must be baked. Otherwise, the surface is easy to have substances, and the baking temperature is 70-90 degrees for 2-4 hours.
Dongguan hengjia rubber & plastic technology co., ltd
Address: No.0/5, Zhang Guan West Road, Zhangmutou Town, Dongguan, Guangdong.