| abstract |
The invention relates to a process for producing shaped articles, where a foam layer which includes a polyurethane foam obtained by foaming a composition including an aqueous, anionically hydrophilicized polyurethane dispersion (I), and drying, is thermoformed where the thermoforming takes place at a temperature of from >= 100°C to <= 200°C and under a pressure of from >= 50 bar to <= 150 bar, and where additionally during the thermoforming the foam is compressed to >= 25% to <= 100% of its original volume. The foam can be stabilized using ethylene oxide/propylene oxide block copolymers. The invention further relates to shape articles obtainable in this way, and to the use thereof, preferably as wound dressings. |