P84 needled felt uses Austrian LENZIHG company produces P84 fiber (poly amide fibers) and the three dimensional acupuncture. which has a very Good high temperature resistance up to 260 ‘C, and P84 fiber cross section shows irregular leaf can greatly improve the filtering effect. Fiber taper itself has a resistance to hydrolysis, oxidation, which has a good temperature resistance, good filtering effect, and widely apply to concrete mixer, cement, waste incineration, using complex operating conditions such as coal-fired boiler.