Shanghai Daoqin Plastics Co., Ltd.

POM polyoxymethylene (POM) typical applications scope/range: POM tool has very low friction coefficient and very good stability property, especially combined made as gears and bearings. due to it also tool has high temperature resistance features, therefore also used for pipeline device parts （阀门, housing/shell 体）, equipment and other. injection molding parts process conditions drying 处理: if material in drying ring in, usually need drying 处理. temperature degree: homopolymer material is 190~230C; copolymer material is 190~210C. injection molding parts mold temperature degree: 80~105C. is decrease small molding rear shrinkage rate can selection high injection molding parts mold temperature degree. injection pressure: 700~1200bar. injection speed degree: in and other or high injection speed degree. runner and gate: can use type type gate. if use 隧道形 gate, most good use relatively short type type. for/regarding homopolymer material use hot runner. for/regarding copolymer material can use internal hot runner can use external hot runner. chemical and material features: POM is types tough has elastic property material, make in low temperature lower still has very good resistant creep features, stability property and impact resistant features. POM既 has homopolymer material has copolymer material. homopolymer material tool has very good strong/high degree, resistant fatigue strong/high degree, easy processing. copolymer material has very good heat stabilized property, chemical stability property and easy processing. homopolymer material also is copolymer material, is crystallization property material and easy absorption water separation. POM high crystallization degree it has versus high shrinkage rate, can high to 2%~3.5%. for/regarding various different reinforcement type material has different shrinkage rate.