Antimicrobial composite
a technology of composites and antimicrobial metals, applied in the field of antimicrobial composites, can solve the problems that no elemental form of antimicrobial metals is present on the exterior surfaces of composites, and achieve the effects of high silver content, high release rate, and satisfactory antimicrobial activity
Inactive Publication Date: 2006-03-16
BEIERSDORF AG
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Benefits of technology
The present invention provides an antimicrobial composite that includes a first layer and a second layer. The first layer is a liquid-permeable layer that has a plurality of openings, and the second layer is a liquid-absorbing layer that has a plurality of openings. The first layer is made of a foraminous structure, such as a perforated film or a mesh, and is open to the exterior surface of the composite. The second layer is made of an organic polymer, such as polyolefin or polyester. The composite has antimicrobial properties and can be used in various applications such as medical devices, wound care materials, and personal care products. The composite has a sheet-like structure and is lightweight and flexible. The amount of antimicrobial metal in the composite can be controlled to provide effective antimicrobial properties without compromising the appearance of the composite.
Problems solved by technology
Moreover, substantially none of this antimicrobial metal in elemental form is present on exterior surfaces of the composite.
Method used
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[0112] A commercially available polyethylene net (Delnet®, available from Applied Extrusion Technologies, and also available from Smith & Nephew Extruded Films Ltd. U.K.), having triangle-shaped holes (length of longest bisector: 400-700 μm) is coated, by vapor deposition, first with aluminum and then with silver (alternatively, a commercially available PE net that already is coated with aluminum may be used). The area weight of the resultant Al and Ag coated net is about 20 g / m2. The content of Al is about 60-80 mg / m2 and the content of Ag is about 60-460 mg / m2. The coated net is laminated to a needle-punched nonwoven (Maliviies) with the coated side facing the nonwoven. The nonwoven is composed of about 75 weight-% of rayon (viscose) and about 25 weight-% of polyethylene / polypropylene fibers and has an area weight of about 120 g / m2. Lamination is carried out under heat and pressure (by slightly melting the PE / PP fibers and pressing the two layers together).
[0113] A material which...
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Abstract
A wound covering article comprises an antimicrobial composite which comprises a first, liquid-permeable layer and a second layer over the first layer, An antimicrobial metal in elemental form is present between the first and second layers. The article further comprises a backing material arranged on the second layer. This Abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application is a divisional of U.S. application Ser. No. 10 / 654,949, filed on Sep. 5, 2003, which claims priority under 35 U.S.C. § 119 of German Patent Application No. 103 28 261.0, filed on Jun. 23, 2003. The disclosures of these applications are expressly incorporated by reference herein in their entireties.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to antimicrobial composites which may be used, in particular, as wound coverings, dressings, cloths, and the like. By coating one side of a liquid-permeable material with an antimicrobial metal such as silver and laminating the resultant material to a material such as a liquid-absorbing nonwoven material with the metal coating facing the liquid-absorbing material, the abrasion of metal particles may be prevented while at the same time, the antimicrobial and disinfectant effect of the metal coating is retained. [0004] 2. Di...
Claims
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IPC IPC(8): B32B7/12B32B15/04A61F13/00A61F13/02A61F13/15A61L15/18A61L15/46B32B15/08B32B27/04B32B27/12B32B27/32
CPCA61F13/0203Y10T428/28A61F13/8405A61F2013/00748A61F2013/0091A61F2013/00936A61L15/18A61L15/46A61L2300/102A61L2300/104A61L2300/404A61L2300/608B32B7/12B32B15/08B32B27/04B32B27/12B32B27/32Y10T428/2857Y10T428/2813Y10T428/2891Y10T428/2848Y10T156/10A61F13/0276Y10T442/2525Y10T442/169Y10T442/10Y10T442/164Y10T442/109Y10T442/172Y10T442/178Y10T442/183B32B2323/04B32B2307/726B32B2307/54B32B2305/026B32B27/08B32B3/26B32B2311/08B32B2311/24B32B2305/38B32B2535/00
Inventor HILFENHAUS, PETERJOHN, HEIKEBUTTNER, HARALD
Owner BEIERSDORF AG