发明名称 |
Method of adding supercritical carbon dioxide to thermoplastic resin and foamed articles |
摘要 |
<p>This invention provides a method for stably adding a predetermined amount of supercritical carbon dioxide at a fixed delivery rate into a forming machine and also a process for producing an expanded thermoplastic resin product by making use of the addition method. Carbon dioxide is charged from a liquefied carbon dioxide cylinder (1) into a predetermined amount deliverable pump (2) while allowing the carbon dioxide to remain in a liquefied state. When the carbon dioxide is pressurized and delivered by the predetermined amount deliverable pump (2), a delivery pressure of the carbon dioxide is controlled at an optional pressure within a range of from a critical pressure (7.4 MPa) of carbon dioxide to 40 MPa to deliver the carbon dioxide without any fluctuation of the amount of the delivery by setting up the pressure of a pressure control valve (3). The carbon dioxide is heated to a critical temperature (31 DEG C) of carbon dioxide or higher to convert it into supercritical carbon dioxide. This supercritical carbon dioxide is then added to a molten thermoplastic resin in the forming machine (4). <IMAGE></p> |
申请公布号 |
EP0972626(A2) |
申请公布日期 |
2000.01.19 |
申请号 |
EP19990305640 |
申请日期 |
1999.07.16 |
申请人 |
MITSUI CHEMICALS, INC. |
发明人 |
NISHIKAWA, SHIGEO;SUGIHARA, EIICHI;TAKEDACHI, MASAHIRO;YORITA, KAORU;INOUE, HARUO;SHIMADA, YOKO;ERIGUCHI, MICHIO |
分类号 |
B29C44/34;(IPC1-7):B29C44/34;B29C44/60 |
主分类号 |
B29C44/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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