Filtration performance of biaxial circular seamless knitted filter material based on electrostatic adsorption

Abstract

In order to solve the problem of dust accumulation at the joints of traditional filter materials and the reduction of filtration efficiency, weft knitting was selected to make the fabric cylindrical unwinding machine. The cylindrical filter material was formed by cylindrical needling machine in the later period. This type of novel seamless filter material was compared with the traditional one on the filtration performance and numerical simulation of filtration performance. The results show that when the warp and weft lining yarns in the seamless filter material were PTFE monofilaments containing tourmaline particles, the filtration efficiency was the optimal due to the presence of the surface static voltage. The filtration efficiency could greatly be improved by 7.24%. The relationship between the surface static voltage and distance was exponential. The filter material with electrostatic field on the surface increased the active filtration of electrostatic adsorption in addition to the passive filtration. This type of seamless filter material provided research and development ideas and theoretical guidance for the development and application of filter materials.

Fabrication and evaluation of aramid fiber/polytetrafluoroethylene emulsion/tourmaline particle composite filter media: Filtration performance, thermal behavior, and mechanical property

“…This phenomenon can be clearly observed in the partial enlarged drawings (see Figure6(d)) of Figure 6(c) (highlighted in red). According to previous literature, there is no chemical reaction between the PTFE and TM particles during the mixing process, 17,29 and thus the filaments are formed by PTFE emulsion in the fabrication process of the composite filter media. The gravity of adhesive TM particles should play a major role in the formation of the PTFE filaments because this force is imbalanced with respect to PTFE emulsion properties such as surface tension and viscosity.…”

Structural design and mechanical properties of glass fiber weft-knitted biaxial tubular fabrics

“…3,4 For these reasons, the WKBT fabrics reinforced composites are widely used in oil and gas flexible pipeline, fire hose and filter bag. 5…”