SCHROEDER, DAVID W.,FREEDMAN, JORDAN H.,GUNTER, JAMES E.,SALYER, BRIAN D.,HAWKINS, H. GENE
申请号：
CA2586618
公开号：
CA2586618C
申请日:
2005.10.06
申请国别(地区):
CA
年份:
2012
代理人:
摘要：
Solid-state deformation processing of crosslinked high molecular weightpolymers such as UHMWPE, for example by extrusion below the melt transition,produces materials with a combination of high tensile strength and highoxidative stability. The materials are especially suitable for use as bearingcomponents in artificial hip and other implants. Treated bulk materials areanisotropic, with enhanced strength oriented along the axial direction. Thematerial is oxidatively stable even after four weeks of accelerated aging in apressure vessel containing five atmospheres of oxygen (ASTM F2003). Because ofits oxidative stability, the deformation processed material is a suitablecandidate for air-permeable packaging and gas sterilization, which has thusfar been reserved for remelted crosslinked UHMWPE.
