| abstract |
In a medical plaster material having a base that is coated with a pressure sensitive hot-melt-type adhesive in an even, porous layer, a coating applied on one side by means of a direct-gravure process provides sufficient porosity and, as a result, vapour permeability to skin moisture, as well as a completely bacteria-proof and reliably adhesive plaster material, due to the fact that: (a) the layer of pressure sensitive hot-melt-type adhesive forms continuous webs in the longitudinal and transverse directions, which delineate island-like nonadhesive surface areas; (b) the nonadhesive surface areas constitute between 30 and 60 % of the entire surface, preferably between 40 and 57 %, and (c) the coating weight of the adhesive is between 30 and 160 g/m2, preferably between 40 and 120 g/m2. Block copolymers with a viscosity between 1,000 and 20,000 mPa.S at 120-180° make suitable hot-melt-type adhesives. The adhesive is applied using a heatable direct-gravure applicator and both a rigid and an elastic doctor blade. |