A procedure for the manufacture of bilaterally oriented polypropylene laminates. (Machine-translation by Google Translate, not legally binding)

摘要

A process for the manufacture of biaxially oriented polypropylene sheets, characterized by extruding the polypropylene at a melting temperature in the range of 190º to 230º C to achieve a non-tubular film, cooling the non-tubular film at a temperature of at least 56º C below the solidification temperature and at least 60 seconds from the time it has been extruded. (Machine-translation by Google Translate, not legally binding)