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US 2004/0104518 A1Published application
Double-walled, blow-molded, poly(vinyl chloride) article and method of making same
OwnerGary S. Henneberryinventor
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Abstract
Formulations of poly(vinyl chloride) are disclosed that have properties to endure the rigors of continuous extrusion blow molding to form double-walled, blow-molded poly(vinyl chloride) articles. The formulations satisfy a test that each formulation has a 40 cm parison formation time of at least 40 seconds.
Claims9
A method of making a making a double-walled poly(vinyl chloride)-containing article, comprising the steps of:
- (a) melting a composition containing poly(vinyl chloride);
- (b) continuously extruding the composition in the form of a parison, wherein the composition is made from a formulation having a 40 cm parison formation time of at least 40 seconds;
- and
- (c) blow molding the parison into a desired shape.
1 more element
A poly(vinyl chloride)-containing article, comprising:
- poly(vinyl chloride) in a formulation having a 40 cm parison formation time of at least 40 seconds.
Dependencies are inferred from the claim text.