Study the shrinkage percentage of plastic polyethylene terephthalate (PET) used with make blow mold

Abstract

The shrinkage depended on the product shape and the type of plastic used in blow, This research aims to study the shrinkage percentage of plastic polyethylene terephthalate grade : N1 used with the make blow mold in 2 stages. The testing results were as follow. vertical shrinkage percentage ( Z axis ) was 0.787 percentage and horizontal shrinkage Percentage ( X,Y axis ) was 2.13 percentage