Method for impregnation a polymeric granulate with a physical blowing agent

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United States of America Patent

PATENT NO 11780118
APP PUB NO 20200353647A1
SERIAL NO

16760090

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Abstract

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A method for impregnating a polymeric granulate with a physical blowing agent is disclosed. The polymeric granulate can be a typical material such as a polycarbonate that is used in foam injection moulding processes. The physical blowing agent can be carbon dioxide which impregnates that polymeric granulate at a temperature range of 40° to 120° C. and a pressure range of 15 to 55 bar. Preferably, the polymeric granulate is heated in a range of 50° to 90° with a range of 60° to 80° preferred. A pressure range of 25 to 45 bar is preferred with a range of 30 to 40 bar more preferred.

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Patent Owner(s)

  • MESSER INDUSTRIES USA, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heninger, Rolf Höhenkirchen-Siegertsbrunn, DE 9 15
Kürten, Andreas Iserlohn, DE 2 2
Praller, Andreas Germering, DE 9 18
Szych, Pawel Munich, DE 4 1

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