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US 2005/0173819 A1Published application
Reduced cuffing in blow molding processes
AssigneeExxonMobil Chemical Patents Inc.
InventorsEric Smith, Clyde Bohne
Life of this patent
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Abstract
Defects in a blow molding process are reduced or eliminated by providing a small amount of a low molecular weight polyethylene glycol to the composition blow molded.
Claims19
A process of manufacturing a blow molded article comprising:
- (a) blow molding a first composition comprising a first polyethylene into a shaped article;
- (b) perceiving parison cuffing defects in said process or said blow molded article;
- (c) then selecting at least one of the following in response to step (b):
- (i) providing to said process a second polyethylene having a lower melt index than said first polyethylene, measured according to ASTM D-1238;
- (ii) providing to said process a small amount of a low molecular weight polyethylene glycol;
- whereby a second composition is blow molded into an article.
3 more elements
A method of reducing cuffing in the blow molding of a composition comprising HDPE, said method comprising incorporating a small amount of a low molecular weight polyethylene glycol in said composition prior to blow molding to provide a new composition and then blow molding said new composition.
Dependencies are inferred from the claim text.