An investigation on Shrinkability of ePTFE Membrane Through Uniaxial Stretching

Poly(tetrafluoroethylene) membranes were prepared through uniaxial stretching operations including cold extrusion, rolling, uniaxial stretching at temperatures up to melting point of PTFE and heat treatment. Morphology of thus prepared PTFE membranes was investigated with SEM. Heat treatment at final step is essential to prevent shrinkage. In this paper, effect of heat treatment is investigated on fixation of membrane morphology at the end of thermal stretching step

Keywords:

Poly(tetrafluoroethylene) , membrane , shrinkage , heat treatment , morphology