Procedure for the preparation of a loop or continuous loop of polypropylene. (Machine-translation by Google Translate, not legally binding)

摘要

Process for preparing a polypropylene loop or continuous loop, characterized in that it includes the phases of: molding by insufflation of air, polypropylene as a raw material, until a tubular sheet is obtained; transverse stretching of said sheet. With a stretch index of at least 4; cut into strips, made before or after said stretch phase, of said sheet, until forming individual continuous sheets; and twisting of these sheets after stretching, forming loops or continuous loops. (Machine-translation by Google Translate, not legally binding)