Lowcell is a supercritical non-crosslinked continuous extruded foamed polypropylene sheet with closed-cell independent cell structure. 3 times the expansion ratio, the density is 0.35-0.45g/cm3, and the thickness specification varies from 3, 5, and 10mm according to the application occasion. It can be made into various turnover boxes and compartment materials, etc., and containers used for transportation and storage of products, etc. The production process of PP foam board is simple, and it can be cut into various shapes and sizes according to needs. This makes it very suitable for making the borders and inner partitions of turnover boxes, etc. Compared with traditional wood or metal materials, PP foam board is more durable and environmentally friendly. It is not easy to rust, rot or moisture, and can effectively resist the corrosion of chemicals. Not only is it able to withstand heavy loads and stacking pressure, but it also needs to protect the loaded items from bumps and damage. PP foam board also has good flame retardancy, which can effectively prevent the occurrence and spread of fire, which provides a higher safety guarantee for the use of turnover boxes. In order to meet these needs, PP foam sheets are widely used in various industries.