A brief introduction to the properties of commonly used ABS plastic sheets.
ABS resin is currently the largest and most widely used polymer. It organically integrates various properties of PS, SAN and BS.Together, it has excellent mechanical properties with balanced toughness, hardness and rigidity. ABS is a terpolymer of acrylonitrile, butadiene and styrene, A stands for acrylonitrile, B for butadiene, and S for styrene.
The appearance of ABS is opaque and ivory-colored pellets, and its products can be colored with high gloss. The relative density of ABS is about 1.05, and the water absorption rate is low. ABS has good bonding with other materials, and is easy to surface printing, coating and plating. The oxygen index of ABS is 18 to 20, it is a flammable polymer, the flame is yellow, there is black smoke, and it emits a special cinnamon smell.
ABS has excellent mechanical properties, its impact strength is excellent, and it can be used at extremely low temperatures; ABS has excellent wear resistance, good dimensional stability, and oil resistance, and can be used for bearings under moderate loads and speeds. The creep resistance of ABS is larger than that of PSF and PC, but smaller than that of PA and POM. The bending strength and compressive strength of ABS are poor among plastics. The mechanical properties of ABS are greatly affected by temperature.
The heat distortion temperature of ABS is 93~118℃, and the product can be increased by about 10℃ after annealing treatment. ABS can still show certain toughness at -40℃, and can be used in the temperature range of -40~100℃.
ABS has good electrical insulation and is almost unaffected by temperature, humidity and frequency, and can be used in most environments.
ABS is not affected by water, inorganic salts, alkalis and various acids, but is soluble in ketones, aldehydes and chlorinated hydrocarbons, and will cause stress cracking when eroded by glacial acetic acid and vegetable oil. ABS has poor weather resistance and is easy to degrade under the action of ultraviolet light; after half a year outdoors, the impact strength is reduced by half.
ABS, like PS, is a thermoplastic with excellent processability and can be processed by common processing methods.
The melt fluidity of ABS is better than that of PVC and PC, but worse than that of PE, PA and PS, similar to POM and HIPS; the flow characteristics of ABS are non-Newtonian fluids; its melt viscosity is related to processing temperature and shear rate , but is more sensitive to shear rate.
ABS has good thermal stability and is not prone to degradation. ABS has a high water absorption rate and should be dried before processing. The drying conditions for general products are temperature 80~85℃, time 2~4h; for products with special requirements (such as electroplating), the drying conditions are temperature 70~80℃, time 18~18h. ABS products are prone to internal stress during processing, and the size of internal stress can be tested by immersing in glacial acetic acid; if the stress is too large and the product is absolutely forbidden to stress cracking, annealing treatment should be carried out, and the specific conditions are hot air circulation at 70~80℃ 2~4h in the drying box, and then cooled to room temperature.
The largest application areas of ABS resin are automobiles, electronic appliances and building materials. Applications in the automotive field include automotive instrument panels, body outer panels, interior trim panels, steering wheels, sound insulation panels, door locks, bumpers, air ducts, and many other components.
In terms of electrical appliances, it is widely used in refrigerators, televisions, washing machines, air conditioners, computers, copiers and other electronic appliances.
In terms of building materials, ABS sheets, ABS sanitary ware, and ABS decorative boards are widely used in the building materials industry. In addition, ABS is also widely used in packaging, furniture, sports and entertainment products, machinery and instrumentation industries.