Super High-Flow POM Resin Polyacetal

Polyoxymethylene is a hard and dense material with a smooth and shiny surface, light yellow or white, and the thin-walled part is translucent. The combustion characteristics are easy to burn, and continue to burn after leaving the fire. The upper end of the flame is yellow, and the lower end is blue. Melting and dripping occur, and there is a strong irritating smell of formaldehyde and fishy smell. POM is white powder, generally opaque, good coloring property, specific gravity 1.41-1.43 g/cm3, molding shrinkage rate 1.2-3.0%, molding temperature 170-200℃, drying condition 80-90℃ for 2 hours. The long-term heat resistance of POM is not high, but it can reach 160°C in the short term. The short-term heat resistance of homopolymerized POM is more than 10°C higher than that of copolymerized POM, but the long-term heat resistance of copolymerized POM is about 10°C higher than that of homopolymerized POM. It can be used for a long time in the temperature range of -40°C to 100°C. POM is easy to decompose, and the decomposition temperature is 240 degrees. Irritant and corrosive gases are produced during decomposition, so the mold steel should be made of corrosion-resistant materials.

POM has high strength and rigidity, good elasticity, good wear resistance and wear resistance. Its mechanical properties are excellent, the specific strength can reach 50.5MPa, and the specific stiffness can reach 2650MPa, which is very close to metal. The mechanical properties of POM change slightly with temperature, and the change of copolymerized POM is slightly larger than that of homopolymerized POM. The impact strength of POM is higher, but the conventional impact is not as good as that of ABS and PC; POM is sensitive to the gap, and the impact strength can be reduced by as much as 90% if there is a gap. The fatigue strength of POM is very prominent. After 10 alternating loads, the fatigue strength can reach 35MPa, while PA and PC are only 28MPa. The creep property of POM is similar to that of PA, it is only 2.3% at 20°C, 21MPa, and 3000h, and it is little affected by temperature. The friction coefficient of POM is small, the wear resistance is good (POM>PA66>PA6>ABS>HPVC>PS>PC), the limit PV value is very large, and the self-lubricating property is good.

Application range：