METHOD FOR MANUFACTURING MICROPOROUS PLASTIC FILM

摘要

The present invention provides a production method of a microporous plastic film that achieves various characteristics such as strength while having an excellent appearance grade by using a wet stretching method. The production method of a microporous plastic film according to the present invention comprises: kneading a diluent and a polymer with an extruder; discharging the polymer kneaded with the diluent into a sheet from a mouthpiece; and stretching the sheet discharged from the mouthpiece in a conveying direction of the sheet with a plurality of rollers; the diluent being applied to at least one of the plurality of rollers and/or the sheet in the step of stretching the sheet in the conveying direction of the sheet.