Screw pair and co-rotating intermeshing twin-screw extruder provided with screw pair
US-9498899-B2 · Nov 22, 2016 · US
Method for extruding plastic materials
US9944008B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9944008-B2 |
| Application number | US-99981009-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 30, 2009 |
| Priority date | Jun 20, 2008 |
| Publication date | Apr 17, 2018 |
| Grant date | Apr 17, 2018 |
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Abstract
Official abstract text for this publication.
The invention relates to a process for extruding plastic compositions, in particular polymer melts and mixtures of polymer melts, above all thermoplastics and elastomers, particularly preferably polycarbonate and polycarbonate blends, also with the incorporation of other substances such as for example solids, liquids, gases or other polymers or other polymer blends with improved optical characteristics, with the assistance of a multi-screw extruder with specific screw geometries.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for extruding plastic compositions comprising extruding the plastic compositions in a multi-screw extruder, co-rotating the screw elements of the extruder in pairs and the screw elements being fully self-wiping in pairs, using screw elements with two or more screw flights Z, with centreline distance A and outer diameter DE, wherein a total of the tip angles of a pair of centerline distance A and an outer diameter DE, wherein a total of the tip…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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- What does patent US9944008B2 cover?
- The invention relates to a process for extruding plastic compositions, in particular polymer melts and mixtures of polymer melts, above all thermoplastics and elastomers, particularly preferably polycarbonate and polycarbonate blends, also with the incorporation of other substances such as for example solids, liquids, gases or other polymers or other polymer blends with improved optical charact…
- Who is the assignee on this patent?
- Koenig Thomas, Bierdel Michael, Liesenfelder Ulrich, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification B29B7/489. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 17 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).