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Publication Number
US-10086107-B2
Publication Date
2018-10-02
Expiration Date
Abstract
A releasably adhesive laminate (1) comprises a structural layer (2) carrying on at least part of one side thereof a hydrophobic gel (4) and on at least part of the other side thereof a pressure-sensitive adhesive (3). The structural layer (2) is preferably a film of synthetic plastics material, eg polyurethane. The pressure-sensitive adhesive (3) is preferably an acrylic adhesive, and the hydrophobic gel (4) is preferably a silicone gel. The laminate (1) may be used as a skin contact component of a wound dressing or in numerous other applications.
Core Innovation
The invention relates to a wound dressing comprising a skin contact layer in the form of a releasably adhesive laminate that includes a silicone gel carried on a melt-blown structural layer and a pressure-sensitive adhesive carried on the other side of the structural layer. The silicone gel is formed from a curable liquid silicone gel precursor composition in direct contact with the melt-blown structural layer, while the pressure-sensitive adhesive is provided on the opposite side of the structural layer.
The disclosed method for manufacture provides a preformed pre-laminate comprising the melt-blown structural layer carrying the pressure-sensitive adhesive on one side, then applies directly to the other side of the melt-blown structural layer a curable liquid silicone gel precursor composition comprising vinyl-substituted silicone and a hydride-containing silicone. The method then causes or allows the silicone gel precursor composition to cure, thereby forming a layer of silicone gel in direct contact with the melt-blown structural layer.
The releasably adhesive laminate is further described as including perforations, including a regular array of perforations, to provide fluid transmission and breathability while maintaining flexibility. Composite wound dressing embodiments are described in which the laminate is used as a skin contact layer and is combined with absorbent pads and a fluid-impermeable barrier layer, optionally with barrier openings and a gas/suction coupling for oxygenation or fluid removal.
Claims Coverage
The partial content identifies one independent claim (clm-00001). The claim coverage centers on manufacturing a wound dressing skin-contact layer as a releasably adhesive laminate using a melt-blown structural layer with an in situ-cured silicone gel formed from a defined precursor chemistry, paired with a pressure-sensitive adhesive on the opposite side.
Manufacture of a releasably adhesive laminate wound dressing skin contact layer
A method for manufacturing a wound dressing comprising a skin contact layer in the form of a releasably adhesive laminate, where a melt-blown structural layer carries a silicone gel formed by curing a curable liquid silicone gel precursor composition directly on one side and carries a pressure-sensitive adhesive on the other side.
Preformed pre-laminate carrying pressure-sensitive adhesive
Providing a preformed pre-laminate comprising the melt-blown structural layer carrying the pressure-sensitive adhesive on one side.
Direct application of silicone gel precursor chemistry
Applying directly to the other side of the melt-blown structural layer a curable liquid silicone gel precursor composition comprising vinyl-substituted silicone and a hydride-containing silicone.
Curing to form silicone gel in direct contact
Causing or allowing the silicone gel precursor composition to cure, thereby forming a layer of silicone gel in direct contact with the melt-blown structural layer.
Overall, the claim set covers forming the wound dressing skin contact layer by directly applying and curing a vinyl-substituted silicone plus hydride-containing silicone precursor onto a melt-blown structural layer that already carries a pressure-sensitive adhesive, with optional perforations and other structural features described in the partial content.
Stated Advantages
Low wound adherence for atraumatic dressing contact.
Softness.
Removability.
Fluid transmission and breathability.
Documented Applications
Composite wound dressing embodiments where the laminate is used as a wound dressing skin contact layer combined with absorbent pads and a fluid-impermeable barrier layer.
Use of barrier openings and a gas/suction coupling for oxygenation or fluid removal in wound dressing contexts.
Skin-adhesive patch applications including attachment to strapless/backless bras, underwear, and nipple covers.
Attachment or use in patch contexts for wigs.
Attachment of protective sports/outdoor equipment, including shin/knee/elbow guards.
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