Eveready Battery Company, Inc.

Wisconsin Alumni Research Foundation

Playtex Products, Inc.

Chris Lacey

Keith J Edgett

Lih-Sheng Turng

Eugene P Dougherty

Patrick Gorton

Xiaofei Sun

Jungjoo Lee

Jr Eugene P Dougherty

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.

Methods for microcellular injection molding

Growing community of inventors

Cambridge, WI, United States of America

Chris Lacey