Method for extruding linear polyolefin materials having high viscosities
US4321229A · kind A · utility
23Cited by
14References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Oct 22, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2023/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for the extrusion of low-density linear polyolefin materials having high viscosities, wherein such materials are continuously fed to and through a rotary extruder having feeding, transition and metering sections which comprises employing, in the extruder screw forming such sections in cooperation with the cylindrical interior of the extruder housing, opened leading edges for the screw flights of said sections; and gall-resistant coated surfaces on the screw flights of said sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.