Sequentially cross-linked polyethylene
US8680173B2 · kind B2 · utility
2Cited by
76References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2012 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Oct 23, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing an improved polyethylene, especially an ultra-high molecular weight polyethylene utilizes a sequential irradiation and annealing process to form a highly cross-linked polyethylene material. The use of sequential irradiation followed by sequential annealing after each irradiation allows each dose of irradiation in the series of doses to be relatively low while achieving a total dose which is sufficiently high to cross-link the material. The process may either be applied to a preformed material such as a rod or bar or sheet made from polyethylene resin or may be applied to a finished polyethylene part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.