Layered adhesive construct
AssigneeColoplast A/S
InventorsMads Lykke, Astrid Toftkaer, Hasse Buus, Tom Bjarnum Kongebo
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Abstract
A layered adhesive construct includes a backing layer and a layer of a pressure sensitive, hot melt processable adhesive composition. The adhesive composition includes a polar plasticising oil or a combination of polar plasticising oils in a content above 10% (w/w), and 10-50% (w/w) of a polar polyethylene copolymer. The polyethylene copolymer has a melt flow index below 2 g/10 min (190° C./21.1N), and the polar plasticising oil is a liquid rosin derivative, animal oils and derivatives, esters, ethers, glycols, poly propylene oxide, or alpha-butoxy-polyoxypropylene.
Claims29
A layered adhesive construct comprising a backing layer and a layer of a pressure sensitive, hot melt processable adhesive composition comprising a polar plasticising oil or a combination of polar plasticising oils in a content above 10% (w/w), and 10-50% (w/w) of at least one polar polyethylene copolymer, the polyethylene copolymer has a melt flow index below 2 g/10 min (190° C./21.1N), the polar plasticising oil being selected from the group consisting of liquid rosin derivatives, animal oils and derivatives, esters, ethers, glycols, poly propylene oxide, and alpha-butoxy-polyoxypropylene.
The layered adhesive construct according to claim 5, wherein the ethylene vinyl acetate has a content of 40-80% (w/w) vinyl acetate.
The layered adhesive construct according to claim 12, wherein a content of the tackifying resin is 0.1-40% (w/w) of the adhesive composition.
The layered adhesive construct according to claim 16, wherein the ingredient includes a polar active ingredient.
The layered adhesive construct according to claim 18, wherein an amount of hydrocolloid is below 50% w/w of the adhesive composition.
The layered adhesive construct according to claim 20, wherein the salt is a water soluble inorganic salt selected from the group of NaCl, CaCl2, K2SO4, NaHCO3, Na2CO3, KCl, NaBr, NaI, K1, NH4Cl, AlCl3 and mixtures thereof.
The layered adhesive construct according to claim 20, wherein the salt is a water soluble organic salt selected from the group of CH3COONa, CH3COOK, COONa, COOK and mixtures thereof.
A medical device comprising a backing layer and a pressure sensitive, hot melt processable adhesive composition comprising a polar plasticising oil or a combination of polar plasticising oils in a content above 10% (w/w), and 10-50% (w/w) of at least one polar polyethylene copolymer, the polyethylene copolymer has a melt flow index below 2 g/10 min (190° C./21.1N), the polar plasticising oil being selected from the group consisting of liquid rosin derivatives, animal oils and derivatives, esters, ethers, glycols, poly propylene oxide, and alpha-butoxy-polyoxypropylene.
The medical device according to claim 27, wherein the backing layer is non-vapour permeable.
The medical device according to claim 27, wherein the backing layer is water vapour permeable and has a moisture vapour transmission rate above 500 g/m2/24 h.
The medical device according to claim 27, wherein the medical device is a dressing, an ostomy appliance, a prosthesis, a breast prosthesis, a urine collecting device, a faecal management device, a measuring instrument, a therapeutic instrument, a medical tape, a dressing, or a bandage for sealing around a medical device on the skin.
The medical device according claim 27, wherein the medical device is a beta-sterilised medical device.
Dependencies are inferred from the claim text.