Plastic hollow boards are generally made of environmentally friendly non-polluting recyclable thermoplastic polypropylene (PP), polyethylene (HDPE) resin and various auxiliary materials. There is also a polycarbonate (PC) hollow board, also known as sunshine board, glass card Pulong board and PC hollow board are made of high-performance engineering plastic PC resin. It has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame retardancy, and anti-aging. It is a high-tech, The comprehensive performance is extremely excellent, energy-saving and environmentally-friendly plastic sheet, which is currently widely used internationally for plastic building materials.