Molded body, method for producing the body and use thereof

1. A method for producing a molded body, said method comprising:

providing a film comprising a thermoplastic plastic and having a film thickness D ranging from 1 μm to 1000 μm;

irradiating the film with ionizing radiation, to produce an irradiated film having irradiated regions having a radiation dose;

thermally reshaping the irradiated film into a molded body so that a correlation between the radiation dose and the irradiated region is not lost and generating at least one hollow structure, wherein a temperature of the thermal reshaping remains below the melting temperature for the thermoplastic plastic, wherein the at least one hollow structure comprises:

an outside diameter d equal to at least double a value of the film thickness D,

a height h equal to or less than double the value of the outside diameter d,

a wall thickness b greater than 0.02 times the film thickness D and less than or equal to the film thickness D, and

a local curvature radius r greater than 0.2 times and less than or equal to 5 times the wall thickness b;

removing the irradiated regions, to create pores having a diameter δ from about 10 nm to about 10 μm in the molded body, and

removing the molded body from a mold.

2. The method according to claim 1 , wherein the film is irradiated through a mask.

3. The method according to claim 2 , wherein the film is irradiated with heavy ions.

4. The method according to claim 3 , wherein the heavy ions have a prespecified energy above 0.1 MeV/nucleon.

5. The method according to claim 1 , wherein the irradiated regions are removed via a wet-chemical etching process.