Sequentially cross-linked polyethylene
US9650476B2 · kind B2 · utility
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80References
24Claims
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Key dates
| Filing date | Oct 6, 2015 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Oct 6, 2035 |
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.