Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1993-04-20
1994-05-31
Theisen, Mary Lynn
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264109, 264126, B29C 6724
Patent
active
053167112
ABSTRACT:
A process for producing shaped or molded articles made of polymer particles containing aromatic imide linkages includes the steps of introducing the polymer particles into a chamber for heating the particles, the chamber having a blade which rotates in the chamber and heats the particles by impacting them; heating the polymer particles to a forming temperature; discharging the polymer particles into a shaping device, such as a mold; and, pressurizing the polymer in the shaping device until the polymer particles consolidate into the shape desired. The process has proven to be effective with polymers that are difficult to process, such as thermoplastic polyimide polymers, polyetherimide polymers, bismaleimide polymers, polyarylate polymers, amideimide polymers, and other polymers containing fully reacted aromatic imide linkages.
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Vol. 1, No. 4 of Drais News of Draiswerke, Inc., 3 Pearl Court, Allendale, N.J. 07401 entitled "New Developments in Superfast Compounding".
Emerson Roger D.
Theisen Mary Lynn
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