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BOPP Film Production Process
Dec 22, 2018

BOPP production is the polymer melt in the first place of polypropylene (PP) through the narrow head made of sheet or thick film, and then within the special drawing machine, under certain temperature and the set speed, at the same time two or step by step in the vertical direction (vertical, horizontal) on the drawing, and through the appropriate cooling or heat treatment or special processing (such as corona, coating, etc.) made of thin film.


At present, there are two main production methods of BOPP thin films: tube membrane method and membrane method. The properties of BOPP films obtained by different processing methods are also different. BOPP thin films produced by flat film method have higher strength and better uniformity of thickness than those produced by tube method due to their large tensile ratio (up to 8 ~ 10).