Method of producing a container of orientable plastic material

Abstract

A method for producing a squeezable, thin-walled tube container of orientable plastic material in which the container includes a mouth portion, a squeezable thin-walled tubular container body having an open bottom-forming portion and a connecting portion located between the mouth portion and the container body and in which the mouth portion and the connecting portion consists of non-oriented material includes forcing the non-oriented material in the tube portion, by mechanical means, through a gap with a gap width at most amounting to approximately half the wall thickness of the material in the tube portion for orientation of the material passing through the gap, thereby obtaining substantially monoaxial orientation of the material which forms the container body and the open bottom-forming portion of the thin-walled squeezable tube container. The material is heated after passage through the gap and maintained at a temperature at which the material undergoes thermal crystallization and/or shrinking in the orientation direction of the material.