Characterization of Material Properties in the Depth Direction of an Oriented PET Reheat Stretch Blow Molded Container

摘要

The properties of PET vary thru the depth of a blow molded article due to variation in blow up ratio. By blowing a preform constructed by injection molding three concentric sleeves, the wall of the blow molded article can be dissected and barrier and physical properties of discreet layers can be measured and correlated with process variables.