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A Study of Bi-Axial Stretching Process for the PTFE Membrane(I)  

Shin, Hong-Chul (EBSI. Corp.)
Kim, Sung-Chul (EBSI. Corp.)
Cho, Ur-Ryong (Dept. of Applied Chemical Engineering, Korea University of Technology and Education)
Publication Information
Elastomers and Composites / v.42, no.2, 2007 , pp. 86-92 More about this Journal
Abstract
A few of polytetrafluoroethylene(PTFE) membranes and PTFE fine powders were analyzed to chooce an optimum resin. The bi-axial stretching process was developed to set up the foundation of the preparation process and control the pore size and porosity of PTFE membrane. The pretreatment of PTFE fine powder used in the preparation process for PTFE was needed. The mixing of additives, the ripening of mixture, paste extrusion process of ripening powder, calendering process and the bi-axial process were conducted for controlling pore size, porosity and thckness of membrane. The aftertreatment which strengthened the mechanical properties was necessary. The control of pore size and porosity of the membrane were determined. The ratio of PTFE fine powder and additives at the paste extrusion process, the ripening time, the ripening temperature and the parameters of temperature and pressure at the paste extrusion process were optimized.
Keywords
polytetrafluoroethylene(PTFE); membrane; biaxial stretching process; pore size; porosity;
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1 Y. S. Li, L. Yan, and C. B. Xiang, 'Preparation of Poly(vinylidene fluoride) Ultrafiltration Membrane Modified by Nano-sized Alumina($Al_2O_3$) and its Antifouling Research', Polymer, 46(18), 7701 (2005)   DOI   ScienceOn
2 K. Kurumada and Kitamura, 'Structure Generation in PTFE Porous Membranes Induced by the Uniaxial and Biaxial Stretching Operations' J. Membrane Sci., 149, 51-57 (1998)   DOI   ScienceOn
3 C. B. Xiao, 'Polymer Membranes for Separating Organic Mixtures' J. Appl. Polym. Sci., 101(2), 1160 (2006)   DOI   ScienceOn
4 S. Ebnesajjad, 'Fluoroplastics : Non-Melt Processible Fluoroplastics', Plastics Design Library, vol. 1, William Andrew, NY(2000)
5 C. Rudolf and W. Burger, 'Microporous Polytetra-fluoroethylene Bodies with Filter', US patent 6,218,000(2001)
6 I. Ochoa and S. G. Hatzikiriakos, 'Polytetrafluoro-ethylene(PTFE) Paste Performing : Viscosity and Surface Tension Effects', Powder Technol., 146, 73 (2004)   DOI   ScienceOn
7 J. Bridwater, 'Paste Extrusion-an Overview', Recent Advances in Chemical Engineering, Tata McGraw-Hill, New Delhi, (1989)
8 D. Newman and F. Morizio 'Method of Preparing Porous Polytetrafluoroethylene Membrane', US patent 6,103,172(2000)
9 A. B. Ariawan, S. Ebnesajjad, and S. G. Hatzikiriakos, 'Paste Extrusion of Polytetrafluoroethylene (PTFE) Fine Powder Resins', Canadian Chem. Eng. J., 80, 1153 (2002)   DOI   ScienceOn
10 N. Davide and F. Morizio, 'Porous Polytetrafluoroethylene Membrane', EU patent 0,948,993 (1999)
11 P. Wang and Y. Yang. 'Preparation and Characterizations of a New $PS/TiO_2$ Hybrid Membranes by Sol-gel Process', Polymer, 47(8), 2683 (2006)   DOI   ScienceOn
12 A. B. Ariawan, S. Ebnesajjad, and S. G. Hatzikiriakos, 'Properties of Polytrtrafluoroethylene (PTFE) Paste Extrudate', Polym. Eng. Sci., 42, 1247 (2002)   DOI   ScienceOn
13 T. A. Blanchet, 'Polytetrafluoroethylene', Handbook of Thermoplastics : Marcel Dekker, NY(1997)
14 J. J. Benbow and J. Bridgwater, 'Paste Flow and Extrusion', Oxford Univ. Press, New York (1993)
15 Korea Membrane Society, 'Membrane Separation-basic', 자유아카데미, 1-20, 60-92 (1996)
16 C. C. Ho and A. L. Zydney, 'Measurement of Membrane Pore Interconnectivity', J. Membrane Sci., 170, 101-112 (2000)   DOI   ScienceOn