Patent ID: 9718903
Date: 2017-08-01
CPC Classifications: B29C,B29K,C08F

Claim:
1. A process of forming molded polymer articles comprising: selecting one or more propylene based polymers formed from a metallocene catalyst; providing the one or more propylene based polymers; melt processing by blow molding the one or more propylene based polymers at a barrel temperature of at least 420° F. and a hot runner temperature of at least 480° F. for at least about 30 hours to form blow molded polymer articles therefrom without experiencing plate-out or blooming in the blow molded polymer articles, wherein the propylene based polymers comprises an ethylene content of less than 5 weight percent and less than 5 weight percent of xylene solubles; and; heat treating the blow molded polymer articles, wherein the heat treating comprises heating the blow molded polymer articles at a temperature of at least about 120° C for a time of at least about 30 minutes, wherein the blow molded polymer articles exhibit a haze reduced by at least 20% in comparison to prior to the heat treating.