Production of UHMWPE sheet materials
US7981349B2 · kind B2 · utility
3Cited by
53References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2010 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2007/002
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.