Abstract: In order to study the effect of antibacterial function on HIPS material used in refrigerator liner, two kinds of silver antibacterial agents were used to make antibacterial HIPS liner material. The mechanical properties, oil resistance, antibacterial properties, food safety, machine forming and accelerated aging properties of these materials were studied. The results show that the mechanical properties, physical properties and oil resistance of the two antibacterial HIPS have no obvious changes compared with those of ordinary HIPS. When the amount of antibacterial agent A is 0.5% or the amount of antibacterial agent B is 3%, the antibacterial rate of HIPS liner material against Escherichia coli and Staphylococcus aureus is more than 99.99%, and the food contact test can meet the regulatory requirements. 150 L single-door refrigerator and 520 L multi-door refrigerator were selected for accelerated aging test. The results show that the reliability of the inner parts can still meet the requirements after adding two kinds of antibacterial agents. Silver antibacterial agent can be widely used in refrigerator liner, which can promote the health and safety upgrade of refrigerator industry.

Key words: Refrigerator liner, Nano silver, Antibacterial properties, Mechanical properties, Ageing test