Improved coextrusion blowmolding process.

摘要

An improvement in the process for coextrusion blowmolding of multilayer polymer articles, wherein a multilayer parison is extruded through a die, introduced into a mold, and blowmolded, the flow of multilayer plastic material being periodically interrupted, and additional plastic material being injected into the extrusion die at timed intervals, so that this additional material forms portions of the parison which later are trimmed from the molded article and reprocessed for reuse.