PECULIARITIES OF THE ELECTRET STATE OF MELT-SPUN AND MELT-BLOWN FIBROUS POLYPROPYLENE MATERIALS

摘要

The charge state of melt-spun and melt-blown polypropylene fibers is investigated. It is shown that the production of fibers by melt-spinning and melt-blowing technologies promotes the formation of a spontaneous polarizing charge. The possible mechanisms of fiber polarization are analyzed. The influence of parameters of the melt-spinning technological process and forced electrization of fibers during their formation in direct and alternating electrical fields on the magnitude and stability of the electret charge is examined. It is established that the application of corona discharge in fiber polarization is more efficient for the electret state formation.