发明名称 |
METHOD OF MAKING BOTTLE PRE-FORMS OF ETHYLENE POLYGLYCOL TEREPHTALATE AND/OR COPOLYESTERS THEREOF BY INJECTION MOULDING A CONDENSATION PRODUCT AND BOTTLE PRE-FORMS OBTAINED THEREBYN |
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 |
PL312865(A1) |
申请公布日期 |
1996.09.02 |
申请号 |
PL19960312865 |
申请日期 |
1996.02.20 |
申请人 |
EMS-INVENTA AG |
发明人 |
STIBAL WERNER;KAEGI WERNER;ENSINGER JOACHIM;NOTHHELFER KLAUS |
分类号 |
B29B11/08;B29C45/00;B29C49/06;B29K67/00;C08G63/88;(IPC1-7):B29C49/06 |
主分类号 |
B29B11/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|