Huilong Plastics Machinery Co., Ltd., established in 1996, is a hi-tech enterprise engaged in manufacturing high-grade extrusion laminating machine. In the past decade years, Huilong cooperated with South China University of Technology and other universities in technologies to research and develop efficient, precise, energy-saving and environmentally-friendly extrusion laminating machine, and owned 20 invention patents, such as “the extruder with principle of energy dynamic equilibrium for economizing on the energy” which is original in the world.