The plastic protective drainage board is made of HDPE/EVA/EPS as the main raw material, and the special extrusion process is used to form a columnar and semi-conical shell with closed protrusions, forming a kind of membrane and shell with continuous three-dimensional space and a certain supporting rigidity, and liquid and gas can flow and excrete in it.

TPO waterproofing membrane is a new type of waterproofing membrane made of thermoplastic polyolefin (TPO) synthetic resin that combines ethylene propylene rubber and polypropylene with advanced polymerization technology as the base material, adding antioxidants, antioxidants, antioxidants, and softeners.