Process for manufacturing a molded body with a superhydrophobic surface and molded bodies which can be obtained by this process and its application

A method for producing a molded body, the method comprising:

• providing a composite, the composite including a first plate having a polymer film pressed into a surface of the first plate;
• providing a third plate, the third plate including roughened areas on at least parts of one or more surfaces thereof, the roughened areas having a mean roughness Ra from 1 μm to 30 μm and an averaged roughness depth Rz from 20 μm to 100 μm,
• placing the third plate opposite the pressed-in polymer film without the third plate touching the composite;
• then
• heating the third plate to a temperature above the glass transition temperature Tg of the polymer of the pressed-in polymer film without heating the composite and without the heated third plate coming into contact with the surface of the pressed-in polymer film, whereby the polymer of the pressed-in polymer film at least partially penetrates into the roughened areas of the third plate, and
• structuring the surface of the pressed-in polymer film facing the third plate by a relative movement which removes the third plate from the first plate while the pressed-in polymer film remains soft and is thus extended lengthwise, thereby forming a modified composite that comprises the molded body.