High-performance PTFE (Polytetrafluoroethylene) needled felt filter material and preparation process thereof
A PTFE and needle-punched felt technology, applied in the fields of filtration and separation, non-woven fabrics, layered products, etc., can solve the problems of affecting the filtration and cleaning effect, large loss of filter material strength, shortened service life, etc., to reduce dust accumulation, High filtration precision and good dimensional stability
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[0028] The filter material includes a fine denier PTFE fiber mesh layer 1, a first base fabric layer 2, an upper PTFE fiber mesh layer 3, a second base fabric layer 4, and a lower PTFE fiber mesh layer 5.
[0029] The preparation process is:
[0030] 1. Production of fine denier PTFE fiber mesh layer and first base cloth layer
[0031] It is completed by the conventional carding and needle punching process, namely: pre-treating the fine denier PTFE fiber → pre-opening → main opening → uniform mixing → feeding → carding into a net → single-sided netting → pre-needling → winding →Inspection and other processes.
[0032] (1) Pretreatment: Spread the fine denier PTFE fiber evenly after loosening it, spraying it with a 1% antistatic agent aqueous solution, leaving it for 12 hours, and then using it; using antistatic agent surface treatment technology to improve its fluffiness to facilitate the next The process is processed, and at the same time, the cohesion between the fibers after formi...
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