Chemical-resistant films in high optical quality

A process for producing a polyamide film or a polyamide moulding, by extruding a polyamide moulding composition through an extrusion film die comprising a die body and a die lip,

• the process comprising:
• melting the polyamide moulding composition at a temperature of between 250 and 330° C. in a multi-screw extruder comprising a first extruder zone, a second extruder zone, and a transition region, where the temperature of the second extruder zone and the transition region is 10° C. higher than the first extruder zone;
• extruding the melted polyamide moulding composition through a die lip having a temperature of between 290 and 370° C.;
• removing an extruded composition having a thickness between 10 μm and 10 mm with at least one roll or at least one belt;
• and
• conveying and at the same time cooling the extruded composition,
• wherein:
• the composition comprises, in polymerized form, an aromatic, aliphatic or cycloaliphatic dicarboxylic acid and a cycloaliphatic diamine,
• the polyamide moulding composition has a carboxyl endgroup fraction, an amino endgroup fraction, or both, of less than 35 mmol/kg, and
• a temperature of the die lip, which is an exit region, is higher than a temperature of the die body by 10° C. to 100° C.