26-10-2007 дата публикации
Номер: NZ546851A
A medical appliance designed to adhere to the skin proximate a stoma or other open wound with an adhesive layer including two or more different composition pressure sensitive adhesives is disclosed, wherein the medical appliance comprises a film layer, a first hydrocolloid adhesive and a second hydrocolloid adhesive, wherein the second hydrocolloid adhesive has a different composition than the first hydrocolloid adhesive. One adhesive is skin friendly, having excellent tack properties, and painless removability. The other adhesive is flexible and comfortable to wear, has high moisture tolerance and the ability to swell to create a seal around the stoma. It has minimal cold flow and will not discolour significantly when sterilized. Particularly disclosed is a medical appliance having a stomal opening, the medical appliance being adherable to peristomal skin around a stoma, comprising: (a) a first hydrocolloid adhesive layer being rubber-free and having a first adhesive surface for contacting the skin, .said first hydrocolloid adhesive layer having initial wet-tack and cold flow adhesion characteristics for directly contacting and adhering to the peristomal, skin, said first hydrocolloid adhesive layer including a polyisobutylene having dispersed therein a water soluble or swellable hydrocolloid or mixture of hydrocolloids; (b) a second hydrocolloid adhesive layer overlying said first hydrocolloid adhesive layer and apart from said skin contacting first adhesive surface, said second hydrocolloid, adhesive layer including a homogeneous mixture of one or more polyisobutylenes or blends of one or more polyisobutylenes and butyl rubber, and one or more styrene radial or block type copolymers, mineral oil, one or more water soluble hydrocolloid gums and a tackifier, said second hydrocolloid adhesive layer being more flexible, having less cold flow, having greater ability to swell, and greater thickness than said first hydrocolloid adhesive layer; and (c) a film layer in ...
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