Title:
MANUFACTURE OF SLIDING MEMBER FOR PROSTHETIC JOINT
Document Type and Number:
Japanese Patent JP2984203
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sliding member for an prothetic joint having a small creep deformation factor and no deterioration of a surface layer and excellent in sliding characteristic and abrasion resistance by irradiating a prescribed quantity of γ-rays to ultrahigh-molecular weight polyethylene as the absorbed dose, heat-treating it at the prescribed temperature, then molding it into the desired shape by cut machining.
SOLUTION: γ-rays 500-10,000kGy are irradiated to ultrahigh-molecular weight polyethylene as the absorbed dose, it is heat-treated at 80-200°C, then it is cut- machined into the desired shape to manufacture a sliding member for an prothetic joint. When γ-ray irradiation and heat treatment are combined, the creep deformation is suppressed to less than 1%, and the creep resistance and abrasion resistance can be remarkably improved. The sliding member is molded into the desired shape by cut machining after γ-ray irradiation and heat treatment, the deteriorated raw material surface of the ultrahigh-molecular weight polyethylene is removed, and the sliding characteristic and abrasion resistance of the sliding face can be improved.
Inventors:
IKADA YOSHITO
OONISHI HIROYASU
FUJISAWA AKIRA
MASUDA SHINGO
OONISHI HIROYASU
FUJISAWA AKIRA
MASUDA SHINGO
Application Number:
JP28422095A
Publication Date:
November 29, 1999
Filing Date:
October 31, 1995
Export Citation:
Assignee:
KYOSERA KK
International Classes:
A61L27/00; A61F2/30; B29C69/00; (IPC1-7): A61L27/00; A61F2/30; B29C69/00