It is the addition of other chemical additives in the glass fiber solution to control the appropriate sintering temperature, speed, pressure and other processes, making it firmly bonded, resulting in a smooth and hydrophobic surface. Dust cannot adhere to the surface of the filter material, making it superior to ordinary glass fiber filter materials in terms of bending resistance, wear resistance, corrosion resistance, high temperature and humidity resistance, bending resistance, and strength, And it can greatly extend its service life. Suitable for high temperature, high humidity, high viscosity dust industries, industrial smoke purification with acidic, alkaline, corrosive chemical gases, and other harsh working conditions.