Process for preparing a non-woven fabric for medical use, comprising the following steps: —performing a spraying process in which —a spray jet is generated from a polycarbonate urethane plastic solution having a viscosity of from 800 to 1500 Pa×s using a spraying unit from which the polycarbonate urethane plastic solution exits； —said spray jet includes at least one strand of a single microfiber that may have a diameter of from 1 to 15 μm, preferably a diameter of from 2 to 10 μm； —said at least one strand of the single microfiber is sprayed onto a support, wherein —the support is moved relative to the spraying unit, or the spraying unit is moved relative to the support； —the spraying process is repeated several times to form polycarbonate urethane microfiber layers； —whereby polycarbonate urethane microfibers formed from the individual spraying processes overlay each other and adhere to each other at the respective contact points； and —a non-woven fabric having a fibrillar microporous structure is formed； —and optionally detached from the support after the last spraying process.
