Most of the plastic storage drawers are made of PP plastic. PP plastic, chemical name: polypropylene PP is a crystalline polymer. PP is the lightest in common plastics the density is only 0.91g / cm3 (smaller than water). Among general-purpose plastics, PP has the best heat resistance. Its heat distortion temperature is 80-100 °C and it can be boiled in boiling water. PP has good stress resistance, is not easy to have crack, and has a long service life. The overall performance of PP is better than PE. PP products are light weight, good toughness, and good chemical resistance.