... ,dust-holding Ankelin manufacture super-thin fiber filtering media with high quality and excellent technical.1, As a kind of pure hydrocarbon ... white.2, Even distribution, soft, dense, high strength,low resistanceand high efficiency.3, Acid-resistance, alkali-resistant, high melting point (167-174)°c, and ... the cooperation from all over the world! Mask filter medium-high efficiency Melt media