1.Its crossing point well-distributed, 2.alkali resistance 3High tensile strength.5fireproof from-260*C -600*C. Needle felt of basalt fiberInstruction of products:On the needle felt of basalt fiber, the basalt single fiber penetrate interlacing out-of-order to form structure of on-orietational three-dimensional aperture. Owing to adopt thinner fiber of 7-9um, bigger than the superficial area, ...