The difference between ABS resin and POM polyformaldehyde

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The difference between ABS resin and POM polyoxymethylene ABS resin ABS resin is a blend, which is an acrylonitrile-butadiene-styrene copolymer, with the English name Acrylonitrile-butadine-styrene (abbreviated as ABS). The ratio of the three is 20:30:50 (melting point is 175°C). As long as the ratio, compounding method, and particle size of the three are changed, a series of varieties with different impact strengths and flow characteristics can be produced. For example, if the butadiene component is increased, the impact strength will be improved, but the hardness and fluidity will be reduced, and the strength and heat resistance will be reduced. ABS is a resin with very good comprehensive properties. It is non-toxic, slightly yellow, has high impact strength in a relatively wide temperature range, has a higher heat distortion temperature than PA and PVC, and has good dimensional stability. The shrinkage is in the range of 0.4% to 0.8%. If it is reinforced with glass fiber, it can be reduced to 0.2% to 0.4%, and there is rarely post-plastic shrinkage. ABS has good molding and processability, high surface finish, good painting and dyeing properties, and can be electroplated into a variety of colors. ABS still has good compounding properties and can be blended with a variety of resins to form alloys (blends), such as PC/ABS, ABS/PC, ABS/PVC, PA/ABS, PBT/ABS, etc., giving it new properties and new application areas. If ABS is blended with MMA, it can be made into transparent ABS with a light transmittance of up to 80%. POM Chemical and Physical Properties of Polyoxymethylene POM is a tough and elastic material that still has good creep resistance, geometric stability and impact resistance even at low temperatures. POM has both homopolymer and copolymer materials. Homopolymer materials have good ductility and fatigue resistance, but are not easy to process. Copolymer materials have good thermal stability, chemical stability and are easy to process. Both homopolymer and copolymer materials are crystalline materials and do not absorb moisture easily. The high degree of crystallization of POM causes it to have a very high shrinkage rate, which can be as high as 2% to 3.5%. There are different shrinkage rates for various reinforced materials. POM has a very low friction coefficient and good geometric stability, making it particularly suitable for making gears and bearings. Because it also has high temperature resistance, it is also used in pipeline components (pipeline valves, pump housings), lawn equipment, etc.