... based and cement-based concrete. polyacrylonitrile fiber pan fiberPolyacrylonitrile fiber is an advanced organic fiber aimed at the modern projects and constructions ... channel, etc.Construction projects: damp proof for roof, columniation, putty, industrial terrace, natatorium, etc.Tunnel and underground projects: jet ... etc. Airport projects: runway, packing apron sleeper, etc. polyacrylonitrile fiber