Abstract: The refrigerator liner is mainly made of HIPS at present. During the production and use of the refrigerator, the liner cracking will occur which will adversely affect the sales and use of the refrigerator. To the refrigerator liner, it is generally believed that there are two main types of refrigerator liner cracking, one is mechanical stress cracking caused by excessive mechanical stress, and the other is chemical stress cracking caused by the increase of internal stress, the stress is mainly caused by chemical medium corrosion, especially when the refrigerator liner under both stress of mechanical and chemical effect. By analyzing the effects of stress and chemical corrosion on the high-gloss and low-gloss HIPS extruded sheets of different formulations, and proposes ideas for the improvement of the inner tank.

Key words: HIPS liner, Cracking, Stress, Edible oil