... 3.Thickness,5-25mm Supply Air Conditioning Filter Media , Synthetic FIber Features1.Using polyester, polyamide, nylon, etc. chemical synthetic fibers, in ... .Using different melting point of exterior and interior of the fiber, thick and thin fibers was fused together by hot-melt ... strong. The integration between the fibers is closer, and the fiber is not easy to shed.4.Low flammability, fire resistance ...