mouldanu

The process of making PET bottles starts with a properly designed preform. The preform design must be based on the cap mould/mold finished bottle's dimensions and the stretchability of the PET grade. A preform is then heated and conditioned before being placed in a PET bottle blowing mould. The preform is blown with very little initial expansion due to the low-pressure air inside the blow mold.A properly designed PET preform prevents pearlescence, a defect in the appearance of the finished product. The pearlescent part of the bottle is the ier part of the preform. A correctly designed preform allows the PET material to stretch and crystallize properly. A properly designed prefo...

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