An antioxidant stabilized crosslinked ultra-high molecular...

A - Human Necessities – 61 – L

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A61L 27/50 (2006.01) A61L 27/16 (2006.01)

Patent

CA 2678459

An antioxidant combined with UHMWPE prior to subjecting the UHMWPE to crosslinking irradiation. In one exemplary embodiment, the antioxidant is tocopherol. After the antioxidant is combined with the UHMWPE, the resulting blend may be formed into slabs, bar stock, and/or incorporated into a substrate, such as a metal, for example. The resulting product may then be subjected to crosslinking irradiation. In one exemplary embodiment, the UHMWPE blend is preheated prior to subjecting the same to crosslinking irradiation. Once irradiated, the UHMWPE blended product may be machined, packaged, and sterilized in accordance with conventional techniques.

L'invention concerne le mélange d'un antioxydant avec du UHMWPE avant de soumettre le UHMWPE à une irradiation de réticulation. Selon un mode de réalisation, l'antioxydant est le tocophérol. Après le mélange de l'antioxydant avec le UHMWPE, le mélange résultant peut être mis sous la forme de tablettes, de blocs et/ou incorporé dans un substrat, tel qu'un métal par exemple. Le produit résultant peut ensuite être soumis à une irradiation de réticulation. Selon un mode de réalisation, le mélange UHMWPE est préchauffé avant d'être soumis à une irradiation de réticulation. Une fois irradié, le mélange UHMWPE peut être usiné, emballé et stérilisé selon des techniques classiques.

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