The high quality products are derived from high quality raw materials. Rijie Group and Dalian University of industry jointly attack the difficulties of raw material technology, and develop and produce special materials for ultra fine glass fiber, and its own three raw materials production plants, all the use of research and development of the special material to produce ultra-fine glass fiber, from the material to ensure the stability of the product, the material produced a long life, larger than the surface area, the pore rate structure is reasonable, air permeability is strong, resistance to piercing strength.  The technology is exquisite and its performance is excellent. It is widely recognized by users both domestically and abroad.