Microporous polypropylene hollow fiber membranes were prepared by the melt-spinning and cold-drawing method. The changes of texture structure of hard elastic polypropylene lale during drawing state and the formation of micropore were studied using SEM, The effects of process condition on the pore structure and properties were also discussed. The results show that the maximum porosity of the membrane with distributing uniformly pore diameter are increased with the lowering spinning temperature, and increasin...
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