The shell of POM hollow pepperball is produced by laser welding. The shell of POM hollow pepper ball welded by laser has no difference from solid plastic ball in appearance, with high precision and good surface finish, while PP plastic hollow ball is produced by blow molding process. The manufacturing processes and use cases of the two plastic balls are completely different.It is difficult to process POM pepper ball shell by laser welding, because POM will emit unpleasant smell when welding at high temperature, so the welding of POM pepper ball shell is mostly produced by automatic technology, and the manufacturing space belongs to unmanned operation. Because of the pungent smell produced during welding, it is difficult for workers to bear such smell. Because POM pepper ball shell is welded by laser, coupled with automatic production technology, the manufacturing cost of POM pepper ball shell is too high, only for POM pepper ball shell.