Abstract: In this paper, ABS, HIPS, ABS+PC, PP and PC as raw materials for injection molding were studied to explore the effect of storage ambient temperature on their properties, that is, the change of color difference, long-term storage at low temperature and the change of temperature from low temperature recovery to room temperature were studied respectively. Influence. The results showed that the above raw materials were stored at 30℃ and 40℃ for 168h, color difference valueΔΔE<0.5, and at 50℃ for 168h, except PC/ABS color difference valueΔΔE<0.5, the other materials color difference valueΔE>1.0. The tensile strength and bending strength of the above raw materials were increased and elongation at break under the storage condition of low temperature -20℃. However, the mechanical properties of the above-mentioned materials remained basically unchanged after the process from low temperature to room temperature.

Key words: Injection molding materials, Storage for high and low temperature, Chromatic aberration, Mechanical properties