Process for producing oriented polymeric film with improved surface quality

摘要

There is disclosed a process for reducing the amount and severity of surface scuffing imparted in oriented polymeric films during manufacture. This process involves the use of low levels of electrical discharge in the form of corona treatment applied in air at ambient atmospheric pressure prior to longitudinal drawing with a roll type process in order to reduce surface defects generated by said roll orientation process. When the instant invention is used in conjunction with polyethylene terephthalate film, the frequency of cleanings required is reduced significantly in comparison to film produced without the aid of this process, thereby allowing longer production runs to occur between cleanings.