Method for preparing perforated film

摘要

A method for preparing a perforated film, for use in the field of sanitary, food packaging and industrial materials, by thermally embossing an oriented polyolefin film with an embossing roll having a large number of protruding knobs and a pinch roll which presses the film against the knobs, and simultaneously taking up the resultant film at a rate not less than the processing speed of the embossing roll.