公开(公告)号：US11780118B2

公开(公告)日：2023-10-10

申请号：US16760090

申请日：2018-10-23

申请人： Messer Industries USA, Inc.

发明人： Rolf Heninger ,  Andreas Praller ,  Andreas Kürten ,  Pawel Szych

IPC分类号： B29C44/34 ,  B29B9/16 ,  C08J9/16 ,  B29B13/02 ,  B29B13/06 ,  C08J9/12 ,  B29K23/00 ,  B29K25/00 ,  B29K69/00 ,  B29K101/12 ,  B29K105/00

CPC分类号： B29B9/16 ,  B29B13/02 ,  B29B13/065 ,  B29C44/3453 ,  B29C44/3461 ,  C08J9/122 ,  B29B2009/161 ,  B29K2023/12 ,  B29K2025/06 ,  B29K2069/00 ,  B29K2101/12 ,  B29K2105/251 ,  C08J2201/036 ,  C08J2203/06 ,  C08J2323/12 ,  C08J2325/06 ,  C08J2369/00

摘要： 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.