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Method of applying a protein coating to a substrate and article thereof
| Details |
Inventors: Everhart, Dennis S.; Kiick-Fischer, Kristi L.;
Assignee: Kimberly-Clark Corporation (Neenah, WI)
Primary Examiner: Pianalto; Bernard
Assistant Examiner:
Attorney, Agent or Firm: Sidor; Karl V.
Disclosed is a method of coating a permeable sheet with amphiphilic proteins, the method including the steps of: 1) providing a permeable sheet having a plurality of individual exposed surfaces, at least a portion of which having relatively low surface energies; 2) providing an aqueous solution containing amphiphilic proteins, the solution having a relatively high surface tension; and 3) contacting the solution containing amphiphilic proteins under shear stress conditions with the matrix of fibrous material so that at least a portion of the amphiphilic proteins are adsorbed onto at least some individual exposed surfaces. Also disclosed is a protein-coated permeable sheet composed of: 1) a permeable sheet having a plurality of individual exposed surfaces, at least a portion of which having relatively low surface energies; and 2) amphiphilic proteins adsorbed onto at least some individual exposed surfaces to define a gradient distribution of amphiphilic protein coating along at least one dimension of the permeable sheet. |
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DETAILED DESCRIPTION The problems described above are addressed by the present invention which is directed to a method of coating a permeable sheet with amphiphilic proteins.
The method includes the steps of: 1) providing a permeable sheet having a plurality of individual exposed surfaces, at least a portion of which having relatively low surface energies; 2) providing an aqueous solution containing amphiphilic proteins, the solution having a relatively high surface tension; and 3) contacting the solution containing amphiphilic proteins under shear stress conditions with the permeable sheet so that at least a portion of the amphiphilic proteins are adsorbed onto at least some individual exposed surfaces.
The permeable sheet may be a matrix of fibrous material.
The matrix of fibrous material may be, but is not limited to, one or more woven fabrics, knit fabrics, nonwoven fabrics and combinations of the same.
The matrix of fibrous material may further include one or more secondary materials.
The matrix of fibrous material may be a nonwoven fabric such as, for example, nonwoven webs of meltblown fibers, nonwoven webs of continuous spunbond filaments and bonded carded webs.
In an embodiment of the invention, the nonwoven web of meltblown fibers may further include one or more secondary materials selected from the group consisting of textile fibers, wood pulp fibers, particulates and superabsorbent materials.
The fibrous material may be formed from a thermoplastic polymer.
For example, thermoplastic polymer may be selected from polyolefins, polyamides and polyesters.
The polyolefin may be selected from polyethylene, polypropylene, polybutene, ethylene copolymers, propylene copolymers, and butene copolymers and blends of the same.
In one aspect of the invention, at least a portion of the fibrous material may be a multi-component or bi-component material selected from multi-component or bi-component fibers and multi-component or bi-component filaments.
It is contemplated that at least a portion, if not all, of these fibers may be textured by use of an expanding agent
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