Patent EP0341870A2 successfully refreshed from Google Patents.
EP0341870A2
Expired / Lapsed
EP
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Absorbent elastomeric wound dressing
Assignee: 3M Co
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Filing: 1989-04-28
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Granted: —
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Expires: 2009-04-28
Abstract
Abstract An elastomeric nonwoven absorbent web is provided. The web comprises a nonwoven fibrous matrix of elastomeric melt-blown small diameter fibers and absorbent staple fibers or absorbent particulate material, wicking staple fibers, and bulking staple fibers dispersed throughout the matrix. This web is particularly useful in an absorbent elastomeric wound dressing. The wound dressing has a fluid permeable, compliant, low adherency wound contacting layer, an intermediate conformable, fluid-absorbent element, i.e., the elastomeric nonwoven absorbent web, and a soft, compliant cover layer.
Inventors
- 👤 John E. Riedel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:30
CPC Classifications
A; A61; A61F; A61F13/00; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/24; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
35 words
An elastomeric nonwoven absorbent web comprising a nonwoven fibrous matrix of elastomeric melt-blown small diameter fibers and absorbent staple fibers or absorbent particulate material, wicking staple fibers, and bulking staple fibers dispersed throughout the matrix.
Claim 2
Dependent Claim
35 words
An elastomeric nonwoven absorbent web comprising a nonwoven fibrous matrix of elastomeric melt-blown small diameter fibers and absorbent staple fibers or absorbent particulate material, wicking staple fibers, and bulking staple fibers dispersed throughout the matrix.
Claim 3
Dependent Claim
46 words
The elastomeric nonwoven absorbent web of claim 1 wherein said elastomeric melt-blown small diameter fibers comprise polyurethane elastomeric materials, polyester elastomeric materials, polyamide elastomeric materials, A-B-A block copolymer materials where the A end groups are styrenic moieties and B is an elastomeric midblock, and combinations thereof.
Claim 4
Dependent Claim
18 words
The elastomeric nonwoven absorbent web of claim 1 wherein said elastomeric melt-blown small diameter fibers comprise polyurethane fibers.
Claim 5
Dependent Claim
82 words
The elastomeric nonwoven absorbent web of claim 1 wherein said elastomeric melt-blown small diameter fibers comprise about 5 to 20 weight percent of said web, said absorbent staple fibers comprise about 10 to 30 weight percent of said web, said absorbent particulate material comprises about 5 to 20 weight percent of said web, said wicking staple fibers comprise about 30 to 60 weight percent of said web, and said bulking staple fibers comprise about 20 to 30 weight percent of said web.
Claim 6
Dependent Claim
23 words
The elastomeric nonwoven absorbent web of claim 1 wherein said absorbent staple fibers comprise fibers having an absorbency of at least about 1000%.
Claim 7
Dependent Claim
20 words
The elastomeric nonwoven absorbent web of claim 5 wherein said absorbent staple fibers comprise acrylonitrile fibers having a hydrophilic surface.
Claim 8
Dependent Claim
25 words
The elastomeric nonwoven absorbent web of claim 1 wherein said wicking staple fibers comprise cotton fibers, rayon fibers, wool fibers, silk fibers, or combinations thereof.
Claim 9
Dependent Claim
29 words
The elastomeric nonwoven absorbent web of claim 1 wherein said bulking staple fibers are crimped fibers having an average crimp frequency of more than about one-half crimp per centimeter.
Claim 10
Dependent Claim
20 words
The elastomeric nonwoven absorbent web of claim 12 wherein said crimp frequency is at least about 2 crimps per centimeter.
Claim 11
Dependent Claim
25 words
The elastomeric nonwoven absorbent web of claim 1 wherein said bulking staple fiber has a flexural rigidity of 1.5 x 10⁻⁴ gram-square centimeters per tex.
Claim 12
Dependent Claim
18 words
The elastomeric nonwoven absorbent web of claim 1 wherein said bulking staple fiber is acrylic or polyester fiber.
Claim 13
Dependent Claim
20 words
The elastomeric nonwoven absorbent web of claim 1 wherein said web has a softness of less than about 80 g.
Claim 14
Dependent Claim
22 words
The elastomeric nonwoven absorbent web of claim 1 wherein said web has a wicking value of at least about 0.5 cm/30 sec.
Claim 15
Dependent Claim
20 words
The elastomeric nonwoven absorbent web of claim 1 wherein said web has an absorbency of at least about 1000 percent.
Claim 16
Dependent Claim
23 words
The elastomeric nonwoven absorbent web of claim 1 wherein said web has an absorbency of at least 11.5 g per g basis weight.
Claim 17
Dependent Claim
23 words
The elastomeric nonwoven absorbent web of claim 1 wherein said web has a retention of absorbed liquid of at least about 50 percent.
Claim 18
Dependent Claim
40 words
An absorbent elastomeric wound dressing comprising (1) a fluid permeable, compliant, low adherency wound contacting layer, (2) an intermediate conformable, fluid-absorbent element, the element comprising the elastomeric nonwoven absorbent web of claim 1, and (3) a soft, compliant cover layer.
Claim 19
Dependent Claim
19 words
The wound dressing of claim 17 wherein said wound contacting layer is a porous nonwoven small diameter fiber web.
Claim 20
Dependent Claim
18 words
The wound dressing of claim 17 wherein said cover layer is absorbent liquid impermeable and moisture vapor permeable.
Claim 21
Dependent Claim
25 words
The wound dressing of claim 19 wherein one face of said cover layer comprises a pressure-sensitive adhesive layer for contact with said fluid absorbent element.
References Cited (Backward Citations)
No citation records indexed.
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