The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Sep. 10, 2010
Eugene P. Dougherty, Jr., Camden-Wyoming, DE (US);
Keith Edgett, Middletown, DE (US);
Lih-sheng Turng, Madison, WI (US);
Chris Lacey, Cambridge, WI (US);
Jungjoo Lee, Madison, WI (US);
Patrick J. Gorton, Clifton Park, NY (US);
Xiaofei Sun, Madison, WI (US);
Eugene P. Dougherty, Jr., Camden-Wyoming, DE (US);
Keith Edgett, Middletown, DE (US);
Lih-Sheng Turng, Madison, WI (US);
Chris Lacey, Cambridge, WI (US);
Jungjoo Lee, Madison, WI (US);
Patrick J. Gorton, Clifton Park, NY (US);
Xiaofei Sun, Madison, WI (US);
Eveready Battery Company, Inc, St. Louis, MO (US);
Abstract
In a method of microcellular injection molding, a polymer and a supercritical fluid are processed. A condition of processing the polymer and/or the supercritical fluid is adjusted to control a weight of a plastic part and/or a surface characteristic of a plastic part produced. In another method of producing a plastic part using microcellular injection molding, a polymer is heated and melted and a supercritical fluid is added thereto. The resulting mix is a single-phase polymer-gas solution comprising the polymer and the supercritical fluid. The polymer and/or the supercritical fluid are adjusted to control the weight of the plastic part and/or a surface characteristic of the plastic part. Once adjusted, the melted polymer with the supercritical fluid is injected into a mold. Upon injecting the melted polymer and supercritical fluid, a pressure drop causes the supercritical fluid to nucleate in the melted polymer, thereby causing nucleation of bubbles.