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濾布經軋光，浸漬PTFE（f防水劑），烘干，定型處理的過濾氈應用在含濕量較大的場合。與普通濾袋相比，因濾料不易堵塞糊袋，故布袋使用壽命延長且清灰周期可延長，通過的氣體流量也加大，故可大量地節省能耗和維護費用，同時也增加了產量 。
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.