Is basically the extrusion of a predetermined length of parison (hollow tube of molten plastic) into a split die, which is then closed in order to seal both ends of the parison.
Then compressed air is introduced (through a blowing tube) into the parison, which blows up to fit the internal contours of the mold.
As the polymer surface meets the cold metal wall of the mold, it is cooled rapidly below TG or TM. When the product is dimensionally stable, the mold is opened, the product is ejected, and new parison is introduced and the cycle is repeated.

Resin used

• Polypropylene (PP)
• Polyethylene (PE)
• Polyvinyl Chloride (PVC)