P84 (polyimide) + Aramid Composite needle felt filter bag

P84 (polyimide) + Aramid Composite needle felt filter bag combines the wear-resistant characteristics of aramid fiber with the high filtration precision and wear-resistant advantages of P84 (polyimide) fiber, overcomes the shortcomings of single material, and makes a new type of composite filter material with high performance and high cost performance. The surface layer of P84 (polyimide) + Aramid Composite needle felt filter bag is selected. The combination of P84 (polyimide) fiber + aramid fiber and high-performance PTFE (polytetrafluoroethylene) base cloth can significantly improve the composite fastness and overall strength of the filter material. The base cloth of P84 (polyimide) + Aramid Composite needle felt filter bag shall be high-strength PTFE (polytetrafluoroethylene) base cloth to ensure that the filter material has sufficient mechanical strength; After the composite filter material is made by the post-treatment process, the unique post-treatment production process of Hongsheng company and the "polytetrafluoroethylene (PTFE) mixed solution needle" are used to impregnate the product as a whole according to the post-treatment formula of the current working condition, and then after high-temperature sintering treatment, the fiber surface is wrapped to form a layer of PTFE protective film, which greatly improves the oxidation resistance, corrosion resistance, temperature resistance and dimensional stability of the filter material; Enhance the hydrophobicity of the filter material, improve the filtration accuracy of the filter material and prolong the service life of the filter material.
P84 (polyimide) + Aramid Composite needle felt filter bag has the following characteristics:
(1) High strength and stable size
P84 (polyimide) composite film coated needle felt filter bag base cloth is made of high-performance PTFE (polytetrafluoroethylene), with high strength and small elongation. After pretreatment, the physical and chemical indexes are significantly improved; After PTFE (polytetrafluoroethylene) impregnation and high-temperature setting treatment, the filter material will not shrink at high temperature, almost maintain the original size, will not affect the gap between the filter bag and the bag cage, and ensure the ash removal effect.
(2) Good temperature resistance
P84 (polyimide) fiber + aramid fiber is selected for instantaneous high temperature of 200 ℃; At the same time, the temperature resistance of high-performance PTFE (polytetrafluoroethylene) based cloth can reach 260 ℃, which can fully ensure that the strength of the filter material will not lose at high temperature. Under normal working conditions, the service temperature can be controlled between + 20 ℃ - 260 ℃ above the dew point.
(3) Easy to remove ash, no blockage and stable operation
The filter material is impregnated with PTFE (polytetrafluoroethylene), with smooth surface, high dust stripping rate and easy ash removal. Due to the narrow front and wide rear channel formed by the filter material, the dust can pass through the filter material to reduce the accumulation, which will not lead to the blockage of the filter material, keep the filter material running for a long time, and slow down the rise and change speed of the inherent resistance of the filter material;
(4) Corrosion resistance
P84 (polyimide) fiber and aramid sulfone fiber have good corrosion resistance. In addition, after the whole filter material is impregnated with PTFE (polytetrafluoroethylene), PTFE (polytetrafluoroethylene) will form a dense protective film on the fiber surface, which improves the anti-oxidation and anti-corrosion performance of the filter material. Therefore, the erosion of the filter bag during operation is very small.
(5) Water and oil repellent, anti condensation
P84 (polyimide) composite film coated needle felt filter bag is impregnated with PTFE (polytetrafluoroethylene) to enhance the hydrophobicity of the filter material, and then processed by high-temperature hot rolling process. Therefore, the filter material has good water and oil repellency and anti condensation function.
(6) High filtering precision
P84 (polyimide) composite film coated needle punched felt adopts the selected blend of P84 (polyimide) fiber and aramid fiber imported from Austria as the effective filter layer. The filter layer formed by the fiber after needle punching is more dense than the bottom filter layer, forming A-type structure on the micro level. The filtration mechanism belongs to "surface filtration". The pore diameter of the filter material is small and the porosity is high, which improves the filtration accuracy of the filter material, and the dust purification efficiency is high and stable, It is easy to meet the dust emission requirements.