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Study of a new novel process for preparing and co-stretching PTFE membrane and its properties |
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| Authors: | Jizhi Huang Xinmin Hao |
| Institution: | a Donghua University, Shanghai 200051, People’s Republic of China b The Quartermaster Research Institute of the General Logistic, Department of CPLA, Beijing 100088, People’s Republic of China c Shanghai New and Special Textile Material Research Center, 1601, No. 2 Building, Shanghai, Beijing 200082, People’s Republic of China |
| Abstract: | A new idea regarding improvement of the elastic recovery property of a PTFE/PU compound membrane through a co-stretching process was put forward. The experimental results show that the PTFE/PU membrane has great elastic recovery owing to PU. When the longitudinally stretching ratio of PTFE is 200%, the traverse stretching ratio is 850%, and the thickness of PU is 0.03 mm. When the longitudinally and traverse elastic recovery of PTFE/PU is 82.1% and 88.6%, respectively, the porosity is 78.0%, mean pore size is 0.382 μm, and the water vapour permeability is 9330 g/24 h m2. It has been used for the SARS protective clothing in China. |
| Keywords: | Co-stretching PTFE/PU membrane Vapour permeability |
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