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Methods of maintaining and using a high concentration of dissolved copper on the surface of a useful article

a technology of dissolved copper and useful articles, which is applied in the field of maintaining and using a high concentration of dissolved copper on the surface of a useful article, can solve the problems of reducing the anti achieve the effects of enhancing the microbial properties of the surface, enhancing the wetting of the copper alloy surface, and enhancing the dissolution of copper

Inactive Publication Date: 2014-08-21
PMX IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method of creating a specific surface finish on copper and copper-alloy surfaces using various methods, such as cold rolling, grinding, or chemical etching. The surface finish improves the ability of the surfaces to be wetted by water and bodily fluids, which enhances the dissolution of copper ions and increases antimicrobial properties. A chemical treatment involving degreasing and further treatment with diluted acid and an oxidizing agent can be used to enhance copper ion uptake from the surface. However, application of tarnish inhibitors or films of oils, waxes, or other substances can prevent copper ion uptake and decrease antimicrobial properties.

Problems solved by technology

Such applications inhibit takeup of copper ions from the treated surface and decrease the antimicrobial properties of the surface.

Method used

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  • Methods of maintaining and using a high concentration of dissolved copper on the surface of a useful article
  • Methods of maintaining and using a high concentration of dissolved copper on the surface of a useful article
  • Methods of maintaining and using a high concentration of dissolved copper on the surface of a useful article

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Embodiment Construction

[0028]The invention can better be understood by reference to the following detailed description wherein numerous exemplary processes are described. Numerous abbreviations are used throughout. To aid in the understanding, some of the abbreviations are described and listed in Table 1 below. These definitions relate to numerous matters, including but not limited to detailed definitions of materials, material characteristics, tests procedures, innovative manufacturing and surface treatment processes and other processes of the present invention.

TABLE 1Process Conditions / DefinitionsFinish A =6-14 Ra rolled, typically 10 RaFinish B =2-5 Ra rolled, typically 4 RaFinish C =18-40 Ra rolled, typically 28 RaMILL OIL =As-rolled; remnants of rolling lubricant. NOTdegreased; starting point for other conditions.DG =Degrease using commercial solutionDRY =Forced air dryPKL =10-20% H2SO4 + 1-3% H2O2RT =Age 72 hours @ 25° C. in airFURN1 =Furnace treat 2 hours @ 200° C. in airFURN2 =Furnace treat 5 minu...

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Abstract

A method for maintaining and using a high concentration of dissolved copper on a surface of a useful article by providing a copper surface without coatings thereon, which increase the wetting angle and which isolate the copper surface and which has a surface roughness between 2 and 50 micro inches Ra, so as to kill microbes thereon.

Description

[0001]The invention claims the benefit of priority of U.S. Provisional Patent Application No. 60 / 747,948, “METHODS OF PRODUCTION AND USE OF ANTI-MICROBIAL COPPER”, filed on May 23, 2006.FIELD OF THE INVENTION[0002]The invention relates generally to methods for increasing the concentration of dissolved copper ions and copper containing molecules in solutions disposed on copper and copper alloy surfaces and thereby enhancing the antimicrobial properties of such copper alloy surfaces. Particularly, it relates to methods which can be practiced on an industrial scale prior to fabrication into semi-finished and finished goods, as well as treatments which can be applied after fabrication.BACKGROUND OF THE INVENTION[0003]Copper and copper alloys have been used for millennia as some of mankind's primary technological materials. Their combination of ease of manufacture, recyclability, resistance to overall corrosion, and their availability on a variety of attractive colors and finishes have m...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B21B45/00
CPCB21B45/00C22C9/00C22C9/04A61K31/30C22F1/08A01N59/20Y10T428/12993A61P31/02Y02A50/30A01N25/34A01N2300/00A01N25/08A61L2/238C21D1/26
Inventor PRATT, RICHARDJOHNSON, THOMAS D.SUH, TIMOTHY
Owner PMX IND