Patent EP0426422A2 successfully refreshed from Google Patents.
EP0426422A2
Expired / Lapsed
EP
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Hydrogel wound dressing product
Assignee: Paul Hartmann AG
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Filing: 1990-10-30
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Granted: —
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Expires: 2010-10-30
Abstract
Abstract A wound dressing product (10) includes a flexible backing member (14) which is vacuum formed to include a depression (38). A pressure-sensitive adhesive layer (16) extends across the depression (38) side of the flexible backing member (14). A hydrogel material (12) is positioned in the depression (38) of the flexible backing member (14) and a release liner (18) extends over the exposed pressure-sensitive adhesive layer (16) and the exposed hydrogel material (12) . The release liner (18) has a selective releasability whereby it can be removed from the wound dressing, product (10) intact, leaving a portion-of the pressure-sensitive adhesive (16) and the hydrogel material (12) exposed.
Inventors
- 👤 James V Cartmell
- 👤 Wayne R Sturtevant
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; A; A61; A61F; A61F13/00; A61F13/02; A61F13/0203; A61F13/023; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/60; A61L26/00; A61L26/0009; A61L26/0019; A61L26/0061; A61L26/008; A61P; A61P17/00; C08G18/08; C08G18/10; A61F2013/00361; A61F2013/00727; A61F2013/00748; A61F2013/00846; A61F2013/00851; A61F2013/00855; A61F2013/00868; A61F2013/00885; A61F13/15; A61F13/15577; A61F2013/15821; A61F2013/15926; C08G2210/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
78 words
A method of treating wounds comprising the step of applying a substantially transparent hydrogel material (12) to a wound site, said hydrogel material (12) comprising from about 15% to about 30% by weight of a polyhedric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide based diamine, up to about 1% by weight of a salt, and the balance water.
Claim 2
Independent Claim
78 words
A method of treating wounds comprising the step of applying a substantially transparent hydrogel material (12) to a wound site, said hydrogel material (12) comprising from about 15% to about 30% by weight of a polyhedric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide based diamine, up to about 1% by weight of a salt, and the balance water.
Claim 3
Dependent Claim
29 words
A method of treating wounds as claimed in claim 1, characterized in that said polyhydric alcohol is selected from the group consisting of polypropylene glycol, polyethylene glycol and glycerine.
Claim 4
Dependent Claim
20 words
A method of treating wounds as claimed in claim 1 or 2, characterized in that said salt is sodium chloride.
Claim 5
Dependent Claim
55 words
A method of treating wounds as claimed in claim 1, 2 or 3, characterized in that said hydrogel material comprises: 17% by weight of said polyhydric alcohol; 12% by weight of said isophorone diisocyanate terminated prepolymer; 9% by weight of said polyethylene oxide based diamine; 1% by weight of said salt; and the balance water.
Claim 6
Dependent Claim
86 words
A wound dressing product (10) comprising: a flexible backing member (14) having a first side and a second side and further having a vacuum formed center portion to define a depression (38) on said first side; a pressure-sensitive adhesive layer (16) extending across said first side of said flexible backing member (14); a hydrogel material (12) located in said depression (38) of said flexible backing member (14); and a release liner (18) extending over said exposed pressure-sensitive adhesive layer (16) and said exposed hydrogel material (12).
Claim 7
Dependent Claim
86 words
A wound dressing product (10) comprising: a flexible backing member (14) having a first side and a second side and further having a vacuum formed center portion to define a depression (38) on said first side; a pressure-sensitive adhesive layer (16) extending across said first side of said flexible backing member (14); a hydrogel material (12) located in said depression (38) of said flexible backing member (14); and a release liner (18) extending over said exposed pressure-sensitive adhesive layer (16) and said exposed hydrogel material (12).
Claim 8
Dependent Claim
21 words
A wound dressing product (10) as claimed in claim 5, characterized in that said pressure-sensitive adhesive (16) comprises an acrylic-based adhesive.
Claim 9
Dependent Claim
74 words
A wound dressing product (10) as claimed in claim 5 or 6, characterized in that said hydrogel material (12) comprises from about 15% to about 30% by weight of a polyhydric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer from about 5% to about 10% by weight of a polyethylene oxide-based diamine, from about 0% to about 1% by weight of a salt, and the balance water.
Claim 10
Dependent Claim
85 words
A wound dressing product (22) comprising: a flexible backing sheet (28); a perimeter-defining, damming layer (26) on the flexible backing member (28) having a central cavity; and a hydrogel material (24) comprising from about 15% to about 30% by weight of a polyhedric alcohol, from about 0% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide based diamine, up to about 1% by weight of a salt, and the balance water.
Claim 11
Dependent Claim
85 words
A wound dressing product (22) comprising: a flexible backing sheet (28); a perimeter-defining, damming layer (26) on the flexible backing member (28) having a central cavity; and a hydrogel material (24) comprising from about 15% to about 30% by weight of a polyhedric alcohol, from about 0% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide based diamine, up to about 1% by weight of a salt, and the balance water.
Claim 12
Dependent Claim
54 words
A wound dressing product (10,22) as claimed in any of claims 5 to 8, characterised in that said hydrcgel material (12, 24) comprises: 17% by weight of polyhydric alcohol; 12% by weight of isophorone diisocyanate terminated prepolymer; 9% by weight of polyethylene oxide based diamine; 1% by weight of salt; and the balance water.
Claim 13
Dependent Claim
30 words
A wound dressing product (10, 22) as claimed in any of claims 5 to 9, characterised in that said flexible backing member or sheet (14, 28) comprises a polyurethane film.
Claim 14
Dependent Claim
25 words
A wound dressing product (10, 22) as claimed in any of claims 5 to 10, characterised in that said hydrogel material (12, 24) is transparent.
Claim 15
Dependent Claim
39 words
A wound dressing product (10, 22) as claimed in any of claims 5 to 11, further characterised by a printed wound sizer (20, 32) on said flexible backing member or sheet (14, 28) overlying said hydrogel material (12, 24).
Claim 16
Independent Claim
154 words
A method of manufacturing a wound dressing product (10), the method comprising the steps of: providing a flexible film (14), said flexible film (14) having a first side and a second side; coating said first side of said flexible film (14) with a pressure-sensitive adhesive (16) capable of adhering to the skin of a patient; introducing said second side of said flexible film (14) to a vacuum platen (36), said vacuum platen (36) defining a center cavity portion (38) in said first side of said flexible film (14); pulling a vacuum on said vacuum platen (36) to draw said first side of said adhesive coated flexible film (14) into said center cavity portion (38); dispensing a hydrogel material (12) into said center cavity portion (38) formed on said first side of said adhesive coated flexible film (14); and attaching a release liner (18) over said first side of said adhesive coated flexible film (14).
Claim 17
Independent Claim
154 words
A method of manufacturing a wound dressing product (10), the method comprising the steps of: providing a flexible film (14), said flexible film (14) having a first side and a second side; coating said first side of said flexible film (14) with a pressure-sensitive adhesive (16) capable of adhering to the skin of a patient; introducing said second side of said flexible film (14) to a vacuum platen (36), said vacuum platen (36) defining a center cavity portion (38) in said first side of said flexible film (14); pulling a vacuum on said vacuum platen (36) to draw said first side of said adhesive coated flexible film (14) into said center cavity portion (38); dispensing a hydrogel material (12) into said center cavity portion (38) formed on said first side of said adhesive coated flexible film (14); and attaching a release liner (18) over said first side of said adhesive coated flexible film (14).
Claim 18
Dependent Claim
75 words
A method of manufacturing a wound dressing product (10) as claimed in claim 13,characterized in that the hydrogel material (12) comprises from about 15% to about 30% by weight of a polyhydric alcohol, from about 8% to about 14% by weight of an isophorone diisocyanate terminated prepolymer, from about 5% to about 10% by weight of a polyethylene oxide-based diamine, from about 0% to about 1% by weight of a salt, and the balance water.
Claim 19
Dependent Claim
25 words
A method of manufacturing a wound dressing product (10) as claimed in claim 13 or 14, characterised in that said hydrogel material (12) is transparent.
Claim 20
Dependent Claim
54 words
A method of manufacturing a wound dressing product (10) as claimed in claim 13, 14 or 15, further characterized by the inclusion of the step of printing a pattern on said flexible backing member (14) overlying said hydrogel material (12), thereby creating a wound sizer (20) permitting measurement of the size of a wound.
References Cited (Backward Citations)
No citation records indexed.
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