Extended PTFE fabrics used as high-temperature filter clothes: manufacturing technique and chemical stability evaluation

Abstract

2014):Extended PTFE fabrics used as high-temperature filter clothes: manufacturing technique and chemical stability evaluation, The Journal of The Textile Institute, Polytetrafluoroethylene (PTFE) bag filters can separate or capture particles due to their porous structure. This study fabricates extended PTFE (ePTFE) fabrics with combination of two twill weaves, two warp/weft ratios, and three picking densities, after which samples are thermally treated at 100, 200, and 300°C for 60 min or treated with 98% sulfuric acid for 30 and 60 min. Influences of these parameters on mechanical properties of resulting ePTFE filter clothes are then explored. Results show that filter clothes have shrinkage below 2 and 7% when treated at 200 and 300°C for 60 min, respectively. Immersion in 98% sulfuric acid for 60 min insignificantly change appearance of filter clothes made by 2/2 twill with a warp/weft ratio of 2 × 1, indicating that ePTFE filter clothes have good dimensional stability and low shrinkage rate.

Waterproof-breathable PTFE nano- and Microfiber Membrane as High Efficiency PM2.5 Filter

“…The permeability of PTFE film produced by Shanghai Ling Fluor Film Technology Co., Ltd., (Shanghai, China) is 64.26 mm·s −1 . Lin et al [37] prepared a PTFE fabric for use in high temperature filtration garments. The fabric has good gas permeability, the maximum gas permeability can reach 21.50 cc/cm 2 /s (215 mm·s −1 ), and the smallest can reach 8.11 cc/cm 2 /s (81.1 mm·s −1 ).…”