滤布经轧光，浸渍PTFE（f防水剂），烘干，定型处理的过滤毡应用在含湿量较大的场合。与普通滤袋相比，因滤料不易堵塞糊袋，故布袋使用寿命延长且清灰周期可延长，通过的气体流量也加大，故可大量地节省能耗和维护费用，同时也增加了产量 。
After treatment of calendering , PTFE dipping, dry , setting  the filter cloth can be used on much more wet occasion. Comparing with common filter bag  this type of felt have a long using life and long cleaning cycle and high gas flow because of the filet material is not easy to block when using. So the energy consumption and maintenance cost greatly lowed and outlet improved.