This series has a rich cotton filter pore, large surface area, excellent sound absorption performance and to restore the ability to remove the smell in the air, SO2, NH3 gas, such as pollution and effective sterilization, with different levels of filtration filter batteries, filters with large surface area, low resistance, long life, high-performance features such as sterilization, can effectively improve the quality of the air supply, are widely used in electronics, chemical, pharmaceutical, food, room, etc. in the air purification system, according to the use of the environment the need to spray Photocatalyst antibacterial pharmaceutical agent.