发明名称 |
Process for postcondensation and rejection moulding of polyethyleneterephthalate, homopolymer or copolymer for the manufacturing of bottle preforms. |
摘要 |
<p>A process for producing bottle preforms from the melt of polyethylene terephthalate and/or its copolyesters, includes selectively introducing an inert gas into the continuous flow or partial flow of the polyester melt from a poly-condensation having an intrinsic viscosity between 0.5 and 0.75 dl/g, subsequently bringing the melt to an acetaldehyde content below 10 ppm in a melt after-condensation reactor and to an intrinsic viscosity of 0.75 to 0.95 dl/g and thereafter guiding the melt into an injection molding tool and processing same.</p> |
申请公布号 |
EP0727303(B1) |
申请公布日期 |
1999.02.03 |
申请号 |
EP19960102464 |
申请日期 |
1996.02.19 |
申请人 |
EMS-INVENTA AG |
发明人 |
STIBAL, WERNER, DIPL.-ING.;KAEGI, WERNER, DIPL.-CHEM. ING. ETH;ENSINGER, JOACHIM, DIPL.-ING. TH;NOTHHELFER, KLAUS, DIPL.-PHYS. |
分类号 |
B29B11/08;B29C45/00;B29C49/06;B29K67/00;C08G63/88;(IPC1-7):B29C67/24;C08G63/90;C08G63/78 |
主分类号 |
B29B11/08 |
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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