Two typical antistatic filter materials,the conductive type of the base cloth embedded with conductive yarns and the conductive type of the surface layer mixed with conductive fibers,were selected as the substrate,and polytetrafluoroethylene(PTFE)emulsion impregnation treatment and PTFE microporous film coating treatment were carried out to obtain the composite filter material with uniform surface density and thickness.Then based on electrical resistivity,static voltage decay time and friction charged voltage 3 indexes,the effects of post-treatment process on the properties of antistatic filter materials were investigated from the perspectives of dissipation and accumulation of static charges.The experimental results showed that,the antistatic performance of the filter material increased after impregnation treatment.The surface resistivity and volume resistivity of the dust-facing surface of the two kinds of filter materials decrease by less than one order of magnitude.The static voltage half-life of the dust-facing surface of the substrate conductive filter material and the surface conductive filter material was shortened from 0.40 s and 0.23 s to 0.38 s and 0.20 s respectively.The friction charged voltage decreased from 1 043 V and 596 V to 668 V and 67 V respectively when the friction time was 60 s.The experimental results also showed that,the antistatic performance of the filter material decreased after film coating treatment.The surface resistivity of the dust-facing surface of the substrate conductive filter material increased by one order of magnitude,and the volume resistivity increased by less than one order of magnitude.The surface resistivity and volume resistivity of surface conductive filter material increasd by 4 orders of magnitude.The static voltage half-life of the dust-facing surface of the substrate conductive filter material and the surface conductive filter material was prolonged from 0.40 s and 0.23 s to 0.53 s and 0.77 s respectively.The friction charged voltage increased from 1 043 V and 596 V to 1 952 V and 920 V respectively when the friction time was 60 s.
关键词
后处理工艺/浸渍处理/覆膜处理/抗静电滤料/表面电阻率/体积电阻率/静电压衰减时间/摩擦带电电压
Key words
post-treatment process/impregnation treatment/film coating treatment/antistatic filter material/surface resistivity/volume resistivity/electrostatic voltage decay time/friction charged voltage
维普
万方数据