Specifications Plastic POM

1.Diameter:2mm-200mm

2.Serivice:Semi-finished machining

3.wear-resistance

1,specification: Referred to as POM Commonly known as the Race of steel Generic POM  polyoxy methylene resin POM is a dense and smooth surface of yellow or white material , high surface hardness and higher gloss ; thin wall section into a translucent. It is a crystalline polymer, a high degree of crystallinity 2. Properties POM is a tough elastic material , even at low temperatures are still very good creep properties, geometric stability and impact resistance. POM homopolymer materials and copolymer materials. Homopolymer material has good extension strength, fatigue strength , but it is not easy to process. The copolymers have good thermal stability, chemical stability and ease of processing. Whether homopolymer or copolymer material materials are crystalline materials and easy to absorb moisture. High crystallinity of POM cause it has a high shrinkage rate, reaching a high of 2% to 3.5%. For a variety of enhanced materials have different shrinkage.
Industrial production methods are generally synthesized POM aqueous formaldehyde solution in the presence of an acid condensation polymerization . To give a degree of polymerization of 100 or more a- polyoxymethylene, and then heated to decompose formaldehyde gas , after refining and dehydration , generally using the purified partially pre- polymerized monomers , and containing a small amount of initiator is introduced into a dry solvent polymerization. Of paraformaldehyde in 170 ~ 200 °C temperature processing, such as injection, extrusion , blow molding and the like.
Properties and applications of high surface hardness and the surface density POM ,  which small abrasion resistance, fatigue resistance, impact resistance , low coefficient of friction , self-lubricating and , therefore, it is the preferred material for the manufacture of gears . POM biggest drawback is not high temperature, thermal stability POM intolerance light irradiation , including visible and non- visible light. POM mechanical strength, rigidity, although shrinkage , but the size and stability. POM good dielectric properties , solvent resistance, stress cracking. POM resistance to twisting changed, after external force is removed , immediately restored to their original Combustion characteristics: flammable, away from the fire will continue to burn after the flame top is golden brown , the lower end of a blue, dripping molten combustion occurs , and issued a strong pungent odor of formaldehyde .