POM (Polyoxymethylene board): English name: Polyoxymethylene, commonly known as Sai steel plate 。 POM plastic particles are extruded by the extruder at high temperature, and then extruded through the corresponding die mouth to obtain board 。 It is a thermoplastic with high melting point and high crystallinity engineering plastic 。 Due to the good characteristics of POM board, it is very suitable for machining on automatic lathe, especially for manufacturing accurate parts.
POM is a kind of linear polymer with high density and high crystallinity without side chains, which has good comprehensive properties.
POM is a hard and dense material with smooth surface and luster, light yellow or white, which can be used for a long time in the temperature range of - 40 - 100 ° C. Its wear resistance and self lubrication are also superior to most engineering plastics, and it has good oil resistance and peroxide resistance. It is not resistant to acid, alkali and ultraviolet radiation.
POM is a crystalline plastic with an obvious melting point. Once the melting point is reached, the melt viscosity drops rapidly. When the temperature exceeds a certain limit or the melt is heated for a long time, it will cause decomposition.
POM has good comprehensive properties. It is hard in thermoplastics. It is one of the varieties of plastic materials whose mechanical properties are closer to metals. Its tensile strength, bending strength, fatigue strength, wear resistance and electrical properties are very good. It can be used for a long time between - 40 ℃ and 100 ℃.
Main features of POM
High mechanical strength, high rigidity, high hardness, good elasticity, sliding and abrasion resistance, good creep resistance, even at low temperatures, high impact strength, excellent dimensional stability, good mechanical performance, physiological inertia, suitable for contact with food.
Normal cannot be used epoxy Resin AB adhesive for bonding.
Application fields of POM:
POM is widely used to manufacture various sliding rotating machinery, accurate parts, gears, bearings, etc. The use industry covers automobile, electronics, clothing, health, machinery, sports equipment and other fields. It is applicable to products of different types of work, high stress parts, processing materials, plates, bars, tubes, high load parts that must have super strength and toughness, gears, pullers, bushings, cams and other abrasion resistant applications, mechanical parts that need abrasion resistance, general mechanical parts that have materials available for machining, need better toughness, mechanical parts that need higher rigidity General mechanical parts requiring higher rigidity, gears used in office automation equipment, thin meat molding products with more mold cavities and less filling, thin meat molding products with more mold cavities and less filling. It is suitable for engineering products. With the increase of crystallinity, the danger of pores in thin-walled products is reduced
Specification and size of POM board: 0.5mm-100mm * 510/610mm * 1000/2000mm
Specification and dimension of POM rod: 3mm-400mm * 1000mm
POM performance value
Specific gravity 1.43
Melting point 175 ° C
Tensile strength (yield) 70MPa
Elongation (yield) 15%
(Fracture) 15%
Impact strength (without notch) 108KJ/m2
(with notch) 7.6KJ/m2
Tips:
Due to the large internal stress of POM plate, in order to prevent stress deformation, internal stress relief treatment shall be carried out before processing to prevent bending deformation of the plate.
