The manufacturing journey of PET bottles begins with two vital fossil energy sources: petroleum and natural gas. The history of PET bottle blowing dates back to discoveries made in the 1970s and their subsequent industrial application. The forming process involves blow molding, with production methods primarily categorized into "one-step" and "two-step" injection stretch blow molding.
The production process begins with the melting and polymerization of raw materials to create a preform. After undergoing heating and stretching, the preform enters the blow molding stage. Inside the blow molding machine, high-pressure air is used to shape the preform into the final bottle. Once blown, the bottles are cooled and undergo rigorous quality inspection.
Key factors influencing the PET bottle blow molding process include preform quality, the heating process, the pre-blowing stage, auxiliary equipment and molds, and the production environment.
