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Method of making polymer powders and whiskers as well as particulate products of the method and atomizing apparatus

United States Patent

January 9, 2001
View the Complete Patent at the US Patent & Trademark Office
Ames Laboratory - Visit the Iowa State University Research Foundation - Office of Intellectual Property & Technology Transfer Website
Method for making polymer particulates, such as spherical powder and whiskers, by melting a polymer material under conditions to avoid thermal degradation of the polymer material, atomizing the melt using gas jet means in a manner to form atomized droplets, and cooling the droplets to form polymer particulates, which are collected for further processing. Atomization parameters can be controlled to produce polymer particulates with controlled particle shape, particle size, and particle size distribution. For example, atomization parameters can be controlled to produce spherical polymer powders, polymer whiskers, and combinations of spherical powders and whiskers. Atomizing apparatus also is provided for atoomizing polymer and metallic materials.
Otaigbe; Joshua U. (Ames, IA), McAvoy; Jon M. (Moline, IL), Anderson; Iver E. (Ames, IA), Ting; Jason (Ames, IA), Mi; Jia (Pittsburgh, PA), Terpstra; Robert (Ames, IA)
Iowa State University Research Foundation, Inc. (Ames, IA)
08/ 895,645
July 17, 1997
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in the invention pursuant to Contract No. W-7405-ENG-82 between the U.S. Department of Energy and Iowa State University, Ames, Iowa, which contract grants to Iowa State University Research Foundation, Inc. the right to apply for this patent.