发明名称 |
Process for producing multi-layer molded product |
摘要 |
There is provided a process for producing a multi-layer molded product having a plurality of thermoplastic resin layers. This process provides for (i) a step of supplying first and second molten thermoplastic resins each through first and second resin supplying gates which are temperature-controllable independently of each other, to between female and male molds kept in an open state with a time difference being provided between supply starts of the first and second resins, and (ii) a step of closing the female and male molds after completion of supply of the first and second resins. The process enables production of high-quality multi-layer molded products having a plurality of resin layers with good repeatability under relatively low resin supply pressure and by single mold closing. Further, high-quality multi-layer molded products can readily be produced without restrictions on materials used.
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申请公布号 |
US6231798(B1) |
申请公布日期 |
2001.05.15 |
申请号 |
US19960716454 |
申请日期 |
1996.09.27 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LTD. |
发明人 |
MATSUMOTO MASAHITO;MUROTANI HITOSHI;FUNAKOSHI SATORU;MATSUBARA SHIGEYOSHI |
分类号 |
B29C43/20;B29C43/34;B29C45/16;B29C45/56;B29L9/00;(IPC1-7):B29C33/02 |
主分类号 |
B29C43/20 |
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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