"SUR" and "PRE" are two categories of QIFA WPC products differentiated based on their manufacturing processes. "PRE" is the first-generation wood-plastic composite product, made by mixing wood fibers, HDPE, and additives, and then heating and extruding the mixture. "SUR" is an upgraded version of the PRE product, also known as co-extruded WPC. It has at least two layers of structure, with the same material used for the core as in PRE, while the outer layer is covered with a 360-degree capped polymer composite for enhanced durability and protection.
Read More