ABS, like PS, is a thermoplastic with excellent processability that can be processed using common processing methods. ABS melt flow is better than PVC and PC, but worse than PE, PA and PS, similar to POM and HIPS; ABS flow characteristics are non-Newtonian; its melt viscosity is related to processing temperature and shear rate , but more sensitive to the 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. General product drying conditions are temperature 80~85°C, time 2~4h; drying conditions for special requirements products (such as electroplating) are temperature 70~80°C, time 18~18h. ABS products are prone to internal stress during processing. The internal stress can be inspected by immersing in glacial acetic acid. If the stress is too high and the product is absolutely prohibited for stress cracking, annealing treatment should be carried out. The specific conditions are hot air circulation at 70~80°C. Dry box 2 ~ 4h, then cooled to room temperature.
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