Patent ID: 8404755
Filing Date: 2013-03-26
Classification: B29B,B29C,B29D,B29K,B65D,C08K,C08L,Y02W,Y10T

Abstract:
1. A process of extrusion blow molding an article comprising: providing a feed material suitable for extrusion blow molding, the feed material consisting essentially of a dry first polyester copolymer component, a dry second polyester component, a chain extender, and optionally a branching agent, wherein the chain extender is selected from the group consisting of trimellitic anhydride, pyromellitic dianhydride, trimellitic acid, or haloformyl derivatives thereof, and the second polyester comprises up to 100 wt % recycled polyethylene terephthalate; feeding the feed material to an extrusion blow molding machine to form an extruded article; and recovering excess material from the extrusion blow molding process as regrind material and combining the regrind material with the feed material.