三防针刺过滤毡的三防即为“防水、防油、防静电”，即在防静电针刺毡的基础上增加“泼水、泼油”功能，适用于含湿量较大的场合，如钢铁厂高炉喷煤粉、水泥厂，电厂输煤系统等。
                 Three resistance needle punched filter felt
The three resistance of three resistant filter felt means  water repellence, oil repellence and anti static , it is said on the base of anti-static filterfelt add to the properties of water repellence and oil repellence. It is used in the occasion of high humidity, such as high stove jet coal powder of ironsteal factory, cement , conveying coal system of power factories.