Irridating aluminum tantra on line dating

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These processes include heat treating, grinding and lapping, high speed polishing, deburring, finishing, edge-bonding, painting, passivating, irridating, bar coding, and a variety of part marking and packaging techniques.

When tooling is required, SPIROL produces tooling in-house to support compound tooling needs and general stamping requirements. SPIROL offers express delivery service, stocking programs in support of JIT deliveries, EDI communications, and free engineering consultation.

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The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials. In another aspect, the invention provides methods of making cross-linked polymeric material comprising the steps of: a) placing a consolidated and cross-linked polymeric material in a pressure chamber; b) filling the chamber with an antioxidant, either in a neat form (about 100%) or in a solution such as a 50% mixture of the antioxidant and alcohol, such as ethanol; and c) pressurizing the chamber to enhance diffusion of the antioxidant into the consolidated and cross-linked polymeric material.

The preferred method of crosslinking is by exposing the UHMWPE to ionizing radiation. 6,448,315), in attempts to improve wear resistance. also described that irradiation does not decrease the oxidation resistance of antioxidant-doped polyethylene. In another aspect, the invention provides methods of making a medical implant comprising: a) providing a polymeric material; b) consolidating the polymeric material; c) irradiating the consolidated polymeric material with ionizing radiation, thereby forming a consolidated and cross-linked polymeric material; d) machining the consolidated and cross-linked polymeric material, thereby forming a medical implant; and e) doping the medical implant with an antioxidant by diffusion, thereby forming an antioxidant-doped cross-linked medical implant.

Oxidation resistant cross-linked polymeric material, such as ultra-high molecular weight polyethylene (UHMWPE), is desired in medical devices because it significantly increases the wear resistance of the devices. According to another aspect, the invention provides methods of making cross-linked polymeric material, comprising the steps of: a) consolidating a polymeric material; b) irradiating the polymeric material with ionizing radiation, thereby forming a consolidated and cross-linked polymeric material; c) doping the consolidated and cross-linked polymeric material with an antioxidant by diffusion; and d) heating the consolidated and cross-linked polymeric material at a temperature below the melting point of the consolidated and cross-linked polymeric material.

This can open the door for greater cost efficiencies while enabling us to conform to more stringent functional and cosmetic standards.

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