HIGH SPEED BAG CLOSURE EXTRUSION

摘要

Disclosed herein is a method for the high speed extrusion of profile elements (16) for home storage units such as reclosable thermoplastic bags. Interlocking elements or plastic zipper strips are extruded directly into a waterbath (17) to be quenched, and drawn through said bath (17) for a distance sufficient to cool said elements (16) to the below softening point of the extruded material. Collection rates of from about 200 to about 350 linear feet per minute are achieved by passsing the elements through a depth of at least 3 feet of water prior to their first contact with a solid handling element (19).