Abstract
Microporous polypropylene fibers were prepared by stretching polypropylene fibers containing CaCO 3 filler. The properties of the resultant fibers are controllable by adjusting the filler content and the stretching ratio. Also, it is elucidated that the fibers have a fine texture of polypropylene fibrils, in which the filler particles are dispersed. Furthermore, the CaCO 3 filler was removed by treating the fibers with an HCl-CH 3 OH solution, and their properties were also investigated.
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