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Antimicrobial composite

Inactive Publication Date: 2006-03-16
BEIERSDORF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0057] It should also be noted that the first layer of the composite of the present invention may have a variety of substances on the surface thereof which is to contact the wound, provided these substances do not interfere to any significant extent with the liquid-permeability of the layer and the antimicrobial effect exerted by the metal. Non-limiting examples of such substances are compounds and compositions which promote wound healing and / or have a skin care effect.
[0088] In addition to its use as a dressing or wound covering in the form of, e.g., a compress, the composite according to the present invention can also be used in other areas, e.g., for skin care applications. For example, moistened skin may be covered or wiped with the composite, for example in the form of a cloth. The moisture will penetrate the cover layer into the moisture-absorbing layer and thereby contact the metal (silver) layer. The antimicrobial metal will be released, thereby providing the antimicrobial effect associated with the metal. One of the advantages of the composite of the present invention is that the skin will not get discolored in these cosmetic uses. This is a substantial improvement over conventionally used products such as, e.g., baby care wipes and dressings.

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 (Malivlies) 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

An antimicrobial composite which comprises a first, liquid-permeable layer and a second layer arranged on the first layer. An antimicrobial metal in elemental form is present between the first and second layers and substantially no antimicrobial metal in elemental form is present on exterior surfaces of the composite. 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 continuation 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. ...

Claims

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Application Information

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IPC IPC(8): B32B27/12B32B27/02D03D15/00B32B27/04A61F13/00A61F13/02A61F13/15A61L15/18A61L15/46B32B7/12B32B15/08B32B27/32
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
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