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US 5,429,591 AGranted
Absorbent dressing having backing and continuous adhesive layer
AssigneeNitto Denko Corporation
InventorsKatsuhiro Yamamoto, Tetsuo Watanabe, Toshiyuki Yamamoto
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Abstract
A dressing comprising a backing and an adhesive layer, wherein the backing is moisture-permeable and the adhesive layer comprises an adhesive composition comprising a rubber-based adhesive, a polymer having a water-absorbing property and/or a water-swelling property, and a metal oxide and/or a metal salt, the polymer having the water-absorbing property and/or the water-swelling property being a polymer containing a functional group having an ability to form a salt and/or coordination compound.
Claims9
A dressing comprising:
- a backing having a first side and a second side;
- and
- a continuous adhesive layer formed on said first side of said backing,
- wherein said backing is moisture-permeable and said continuous adhesive layer comprises an adhesive composition comprising a rubber-based adhesive, a polymer having at least one of a water-absorbing property or a water-swelling property, and a water soluble metal salt selected from the group consisting of aluminum salt, calcium chloride, copper sulfate and combinations thereof, said polymer containing a functional group having an ability to form at least one of a salt or a coordination compound whereby said polymer forms ionic or coordinate bonds to metal ions generated from said water soluble metal salt by contact with wound exudate or body fluid to enable the adhesive layer to absorb said wound exudate or body fluid, wherein said rubber-based adhesive contains polyisobutylene as the base material and further contains at least one member selected from the group consisting of polyisoprene, natural rubber, polybutadiene, polyethylene, polypropylene, and an ethylene-propylene copolymer and wherein, said adhesive layer has been subjected to irradiation treatment.
1 more element
A dressing obtained by a process which comprises the steps of:
- coating a backing in continuous form with an adhesive composition comprising a rubber-based adhesive, a polymer having at least one of a water-absorbing property or a water-swelling property, and a water soluble metal salt selected from the group consisting of aluminum salt, calcium chloride, copper sulfate, and combinations thereof, thereby to form a continuous adhesive layer, wherein said rubber-based adhesive contains polyisobutylene as the base material and further contains at least one member selected from the group consisting of polyisoprene, natural rubber, polybutadiene, polyethylene, polypropylene, and an ethylene-propylene copolymer,
- subjecting said adhesive layer to irradiation,
- applying a separator to an exposed surface of the continuous adhesive layer, thereby to form a three-layered structure,
- forming a groove on the three-layered structure by pressing the three-layered structure with one of a mold or a roll having a projection, and
- cutting the resulting three-layered structure at the grooved part, thereby to produce the dressing,
- wherein said backing is moisture-permeable, said polymer containing a functional group having an ability to form at least one of a salt and a coordination compound.
3 more elements
Dependencies are inferred from the claim text.