Patent EP0351016A2 successfully refreshed from Google Patents.
EP0351016A2
Expired / Lapsed
EP
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Artificial skin
Assignee: Koninklijke Utermohlen NV
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Filing: 1989-07-07
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Granted: —
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Expires: 2009-07-07
Abstract
Abstract A material which transmits wound moisture, made up of an upper layer of an elastomer having a thickness of 0.01-0.2 mm which is provided with pores having a diameter not exceeding 0.7 µm and a pore density of 1-75 % of the surface, and a lower layer of an elastomer having a thickness of 0.05-1 mm which is provided with macropores having a diameter of 50-200 µm, at least some of the walls of said macropores being provided with micropores having a diameter of 0.1-0.25 µm, is provided. The material of the invention meets a number of conditions making it suitable for the use of artificial skin.
Inventors
- 👤 Etienne Joseph Carolus Martinus Petrus Lommen
- 👤 Charles Roelf Hendrik Wildevuur
- 👤 Wouter Leonardus Joseph Hinrings
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:11
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/60; A61F; A61F2/00; A61F2/02; A61F2/10; A61F2/105; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/425; A61F13/00; A61F2013/00089; A61F2013/00157; A61F2013/00182; A61F2013/00217; A61F2013/00221; A61F2013/00246; A61F2013/00251; A61F2013/00255; A61F2013/00259; A61F2013/00263; A61F2013/00293; A61F2013/00361; A61F2013/00365; A61F2013/00519; A61F2013/00527
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
Artificial skin which transmits wound moisture, made up of a) an upper layer of an elastomer having a thickness of 0.01-0.2 mm which is provided with pores having a diameter not exceeding 0.7 µm and a pore density of 1-75% of the surface, and b) a lower layer of an elastomer having a thickness of 0.05-1 mm which is provided with macropores having a diameter of 50-200 µm, at least some of the walls of said macropores being provided with micropores having a diameter of 0.1-0.25 µm.
Claim 2
Dependent Claim
87 words
Artificial skin which transmits wound moisture, made up of a) an upper layer of an elastomer having a thickness of 0.01-0.2 mm which is provided with pores having a diameter not exceeding 0.7 µm and a pore density of 1-75% of the surface, and b) a lower layer of an elastomer having a thickness of 0.05-1 mm which is provided with macropores having a diameter of 50-200 µm, at least some of the walls of said macropores being provided with micropores having a diameter of 0.1-0.25 µm.
Claim 3
Dependent Claim
22 words
Artificial skin according to Claim 1, characterized in that the upper layer is provided with pores having a diameter of 0.2-0.44 µm.
Claim 4
Dependent Claim
20 words
Artificial skin according to Claim 1 or 2, characterized in that the thickness of the upper layer is 0.02-0.1 mm.
Claim 5
Dependent Claim
26 words
Artificial skin according to one or more of Claims 1-3, characterized in that the pore density of the upper layer is 25-40% of the surface area.
Claim 6
Dependent Claim
22 words
Artificial skin according to one or more of Claims 1-4, characterized in that the lower layer is manufactured from a nonbiodegradable elastomer.
Claim 7
Dependent Claim
22 words
Artificial skin according to one or more of Claims 1-5, characterized in that the thickness of the lower layer is 0.1-0.7 mm.
Claim 8
Dependent Claim
33 words
Artificial skin according to one or more of Claims 1-6, characterized in that the ratio of vacant volume to total volume for the lower layer is in the range of 0.5-0.95, preferably 0.7-0.9.
Claim 9
Dependent Claim
31 words
Artificial skin according to one or more of Claims 1-7, characterized in that the micropores in the walls of the macropores form a "continuum" with the micropores in the upper layer.
Claim 10
Dependent Claim
22 words
Artificial skin according to one or more of Claims 1-8, characterized in that a polyurethane having elastomeric properties is used as elastomer.
Claim 11
Dependent Claim
53 words
Artificial skin according to Claim 9, characterized in that, as elastic polyurethane, use is made of a polyether urethane or a polyester urethane which is based on the elements chosen from the group comprising polytetramethylene adipate, polyethylene glycol adipate, polytetramethylene oxide, polydiethylene glycol adipate, 3,4′ and 4,4′-diphenylmethane diisocyanate, toluene diisocyanate and hexamethylene diisocyanate.
References Cited (Backward Citations)
No citation records indexed.
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