JOURNAL OF TEXTILE RESEARCH ›› 2017, Vol. 38 ›› Issue (11): 22-26.doi: 10.13475/j.fzxb.20170501705

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Filtration performance of polytetrafluoroethylene fiber electret fabric charged by tribo-electrically

  

  • Received:2017-05-05 Revised:2017-07-29 Online:2017-11-15 Published:2017-11-15

Abstract:

In order to study the effect mechanism of static charge generated by friction in the process on the filtration efficiency of PTFE (polytetrafluoroethylene) fiber nonwoven materials, and prepare high filtration efficiency, a low-resistance nonwoven filter material, PTFE-fiber was selected as the raw material, the puncture nonwoven fabric with different weight were prepared by staple combing and acupuncture. The surface electrostatic potential and the filtration performance of the nonwovens were measured in the range of 0 to 40 days after tribo-charging, and the charge storage stability of acupuncture nonwovens was analyzed. The results show that the PTFE-fiber nonwoven fabric treated by carding and needle punching process have high filtration efficiency and low- resistance. The higher the weight is, the higher the surface potential and the filtration efficiency of the nonwovens. PTFE-fiber filter material charged by taibo-electric with the weight of 220 g/m2 can capture more than 99% particles of 0.26μm, and the electrostatic decay cycle is longer. Water soaking gas little linfluence on the static decay.

Key words: polytetarfluoroethylene fiber, needling, tribo-electric charging, electret, static charge decay, filtration

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