Invention Grant
- Patent Title: Method for the production of polyester granulates from highly viscous polyester melts and also device for the production of the polyester granulates
- Patent Title (中): 从高粘度聚酯熔体生产聚酯颗粒的方法以及用于生产聚酯颗粒的装置
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Application No.: US13730823Application Date: 2012-12-28
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Publication No.: US09346191B2Publication Date: 2016-05-24
- Inventor: Kurt Hanimann , Eike Schulz van Endert , Theodor Anton Bruckmann
- Applicant: Uhde Inventa-Fischer GmbH , BKG Bruckmann & Kreyenborg Granuliertechnik GmbH
- Applicant Address: DE Berlin DE Munster
- Assignee: UHDE INVENTA-FISCHER GMBH,NORDSON BKG GMBH
- Current Assignee: UHDE INVENTA-FISCHER GMBH,NORDSON BKG GMBH
- Current Assignee Address: DE Berlin DE Munster
- Agency: Fenwick & West LLP
- Priority: DE102007040135 20070824
- Main IPC: B29B9/12
- IPC: B29B9/12 ; B01J8/12 ; B01J19/00 ; B01J19/20 ; B29B9/06 ; B29B9/16 ; C08G63/90 ; B29B13/06 ; B29K67/00
Abstract:
The invention relates to a method and device for the direct production of polyester granulate from a highly viscous polyester melt with a polymerization degree of 132 to 165, as well as the granulates formed thereform. In the method, the highly viscous polyester melt is subjected to a pre-drying and drying/degassing after a hot cutting method. Hot cutting is implemented at water temperatures of 70° C. to 95° C. and with a liquid to solid ratio of 8 to 12:1.
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