Patent ID: 9044323
Filing Date: 2015-06-02
Classification: A61F,A61L,Y10T

Abstract:
1. A high wear-resistance bearing material for being used under a humid environment comprising: a substrate made of a polymer material having a methylene repeating unit; and a polymer layer covering a bearing surface of the substrate, the polymer layer comprising polymer chains which have a phosphorylcholine group and are grafted from the bearing surface, wherein the polymer layer having the phosphorylcholine group has a static-water contact angle not greater than 20 degrees, and wherein a phosphoric index of a covered bearing surface covered with the polymer layer is not less than 0.28, the phosphoric index being calculated by dividing a peak intensity of a phosphate group of the polymer layer in an infrared spectrum measured on the covered bearing surface by a peak intensity of the methylene repeating unit of the bearing surface in the infrared spectrum.