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

Jia-Horng LinLaboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan;School of Chinese Medicine, China Medical University, Taichung, Taiwan;Department of Fashion Design, Asia University, Taichung, Taiwan

Chien-Lin HuangAdvanced Medical Devices and Composite Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan

Ting-Ting LiSchool of Textiles, Tianjin Polytechnic University, Tianjin, China

Yu-Ming LeeLaboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan

Zong-Han WuLaboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan

Ching-Wen LouInstitute of Biomedical Engineering and Materials Science, Central Taiwan University of Science and Technology, Taichung, TaiwanCorrespondence[email protected]

Abstract

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.

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

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

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