Polyester needle felt filter using non-woven series of acupuncture techniques, and is made by heat-setting and other treatment methods are widely used in industrial catch dust, dust control and so on. Polyester needle felt filter permeability, and after heat treatment, surface smooth, easily deformed, easy cleaning. Polyester needle felt filter after hydrophobic oleophobic treatment because of its hydrophobic properties, used in high moisture content with a small amount of oil or soot, can prevent the paste bags and prolong life. ☆ 208 polyester flannel is ideal dust filter, with the ventilation is good, high collection efficiency, and a certain acid, alkali and heat capacity of the weaving process using a multilateral brushed improve the fabric thickness, elastic , so the good effect of dust, dust removal rate of 99.99%. These two products have been widely used in petroleum, chemical, metallurgy, mining, cement, and environmental dust and other industries. ☆ 729 polyester fabric tube with high strength and low elongation polyester fiber weaving, and made by heat-setting and other treatment methods are widely used in industrial catch dust, dust control and so on. 729 series polyester filter material suitable for shrink bags and low energy mechanical vibration categories cleaning bag filters, can be long-term below 130 ℃, the flue gas temperature above the dew point of the work environments, a short time can be resistant to 150 ℃. However, the filter should be applied to avoid the 729 or viscous fibrous dust environments; high moisture content such as filters and a small amount of oil-containing soot, can be used by water treatment increasing oil filter 729; such as filtration media explosive dust when the choice of anti-static dust bag handle 729-E filter.