METHOD OF MAKING A COMPRESSION MOULDED PREFORM, SUCH A COMPRESSION MOULDED PREFORM AND METHOD OF MAKING A STRETCH BLOW MOULDED PLASTIC CONTAINER

摘要

A polymeric preform (10) that can be blow molded into a plastic article includes an open neck portion, a body portion (12) with a sidewall (14), and a closed end (16) opposite the neck portion with a thickness of not more than 70 percent of the thickness of the sidewall. The thickness of the closed end is preferably in the range of 30 percent to 70 percent of the thickness of the sidewall, and more preferably between 30 percent to 50 percent of the sidewall thickness. This reduces the volume or amount of material needed to form the preform without adversely impacting the structural integrity or physical properties of a container formed from the preform. According to one presently preferred aspect of the invention, the preform is compression molded. A method of making this preform and a method of making a stretch blow molded plastic container (11) are also disclosed.