Surface gradient cross-linking method of ultra-high molecular weight polyethylene and the application thereof
Assigneesb-ONE Medical (Suzhou) Co., Ltd., b-ONE Medical Biotech Corporation, b-ONE Orth, Corp
InventorZongtao Zhang
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Abstract
The invention relates to a surface gradient cross-linked method of a ultra-high molecular weight polyethylene and the application thereof. The surface gradient crosslinked method of ultrahigh molecular weight polyethylene includes a n ultra-high molecular weight polyethylene surface photoinitiator diffusion step and an ultraviolet light irradiation crosslinking step. In this method, the photoinitiator is diffused deeply into the surface of ultra-high molecular weight polyethylene, the body material shows a gradient cross-linking from the surface to the inside after ultraviolet irradiation so that the whole bulk has a high toughness and the surface there of has a high wear resistance.
Claims15
A crosslinking method for a surface layer of an ultra-high molecular weight polyethylene substrate, wherein the crosslinking method includes:
- (1) providing a photoinitiator in the ultra-high molecular weight polyethylene substrate, and diffusing the photoinitiator from a surface of the substrate into the surface layer of the ultrahigh molecular weight polyethylene substrate at a temperature above the melting point of the photoinitiator and below the melting point of the ultra-high molecular weight polyethylene;
- (2) exposing the diffused surface layer with ultraviolet light to crosslink the surface layer, thereby forming a surface layer gradient crosslinked ultra-high molecular weight polyethylene, wherein a radiation intensity of the ultraviolet light is ≥100 mW/cm2.
Dependencies are inferred from the claim text.