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1. 发明申请

US20050043431A1 Sequentially cross-linked polyethylene 有权
标题翻译：顺序交联聚乙烯
公开(公告)号：US20050043431A1
公开(公告)日：2005-02-24
申请号：US10957782
申请日：2004-10-04
申请人： Aiguo Wang , John Dumbleton , Aaron Essner , Shi-Shen Yau
发明人： Aiguo Wang , John Dumbleton , Aaron Essner , Shi-Shen Yau
IPC分类号： A61L27/00 , A61L27/16 , C08J7/00 , C08G2/00
CPC分类号： C08J3/28 , A61L27/16 , C08J3/247 , C08L23/06 , C08L2312/06
摘要： 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. If applied to a finished polyethylene part, the irradiation and annealing must be accomplished with the polyethylene material not in contact with oxygen at a concentration greater than 1% oxygen volume by volume. When applied to a preform, such as a rod, the annealing of the bulk polymer part of the rod from which the finished part is made must take place on the rod before the implant is machined therefrom and exposed to oxygen.
摘要翻译：一种生产改进的聚乙烯，特别是超高分子量聚乙烯的方法，该聚乙烯利用顺序的照射和退火工艺来形成高度交联的聚乙烯材料。在每次照射之后使用顺序照射，然后进行顺序退火，允许在一系列剂量中的每个剂量的照射相对较低，同时实现足够高的交联材料的总剂量。该方法可以应用于预成型材料，例如由聚乙烯树脂制成的棒或棒或片，或者可以施加到成品聚乙烯部分上。如果应用于成品聚乙烯部件，照射和退火必须用不超过1体积氧浓度的氧气接触的聚乙烯材料完成。当应用于诸如棒的预成型件时，制造成品部件的棒的主体聚合物部分的退火必须在植入物从其加工并暴露于氧之前在棒上进行。

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