Process for removing moisture and volatiles from pellets in single screw extruders
US6129873A · kind A · utility
20Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1999 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Apr 7, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/288
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a process for extruding a thermoplastic resin in a single screw extruder, a barrel of a single screw extruder has a channel, a feed section and a first melt seal located after the feed section. The process is improved by supplying solid polymer into the feed section and venting moisture extracted from the polymer during the conversion of the polymer from a solid to a melt into a vent area and through a rear vent positioned in the feed section. An unfilled area within the channel of the barrel between the rear vent and the first melt seal forms the vent area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.