Shrink films comprising PA 6/6,6

A process for producing a polymer film (P) comprising a polyamide composition (PC), wherein the polyamide composition (PC) comprises nylon-6/6,6 and polyamide oligomers and where it is possible to extract in the range from 5% to 25% by weight, based on the total weight of the polyamide composition (PC), of polyamide oligomers from the polyamide composition (PC) according to ISO 6427:

• 2013, the process comprising:
• i) providing the polyamide composition (PC) in molten form in a first extruder,
• ii) extruding the polyamide composition (PC) provided in i) in molten form from the first extruder through an annular die to obtain a tube comprising the polyamide composition (PC) in molten form,
• iii) cooling the tube comprising the polyamide composition (PC) in molten form obtained in ii) in a water bath to a first temperature (T1), which solidifies the polyamide composition (PC) to obtain a first tubular film comprising the polyamide composition (PC),
• iv) heating the first tubular film obtained in iii) to a second temperature (T2) to obtain a heated first tubular film comprising the polyamide composition (PC),
• v) blowing air into the heated first tubular film obtained in iv), which stretches the heated first tubular film widthwise, and where the heated first tubular film is cooled to a third temperature (T3) to obtain the polymer film (P) comprising the polyamide composition (PC).