Method for producing an, in particular oral, active substance laminate, and active substance laminate, in particular oral active substance laminate

A method for producing an active substance laminate, having at least one active-substance-containing layer, which is arranged on a substrate, wherein the method comprises the following steps:

• a) providing a substrate having an upper side and an under side;
• b) applying an active-substance-containing mass in a gap formed by a first rotating roller and a second rotating roller, wherein the gap between the first rotating, roller and the second rotating roller has a width of from 0.2 mm-0.9 mm;
• c) transporting the substrate to the second roller by means of a third rotating roller in such a way that the active-substance-containing mass is applied to the upper side of the substrate in the form of an active-substance-containing layer to form an intermediate laminate by the second roller, wherein the rotation speed of the first rotating roller is 0.1 m/min-0.5 m/min, the rotation speed of the second rotating roller is 0.8 m/min-2.3 m/min and the rotation speed of the third rotating roller is 0.5 m/min-1.5 m/min, wherein the second roller has a rotation speed greater than the rotation speed of the third roller;
• d) transporting the intermediate laminate, formed by the substrate and the active-substance-containing layer, to a drying device;
• e) drying the active-substance-containing layer of the intermediate laminate in the drying device at a temperature of 30-120° C.;
• and
• f) guiding the dried intermediate laminate through laminating rollers and forming the active substance laminate.