CORONA CHARGING OF FLASH SPUN PLEXIFILAMENTARY FILM-FIBRIL WEBS IN POOR CHARGING ENVIRONMENTS

摘要

This invention relates to flash spinning a plexifilamentary film-fibril strand and laying it down into sheet material including the step of subjecting the strand to an electrostatic charge. The invention is particularly focused on cleaning, and maintaining clean, the target plate (60) of the electrostatic charging system by scrubbing or scouring the surface of the target plate with a highly abrasive brush (70) moving at a relatively high speed. The target plate (60) is selected to be abrasion resistant.