Polypropylene composition with improved optical characteristics

A polypropylene composition (PC), comprising:

• i) from 95.0 to 99.9 wt. %, relative to the total weight of the polypropylene composition (PC), of a monophasic propylene-ethylene random copolymer (R-PP) having a melt flow rate (MFR2), determined according to ISO 1133 at 230° C. at a load of 2.16 kg, in the range from 30 to 60 g/10 min and an ethylene content, as determined by 13C-NMR spectroscopy, in the range from 4.0 to 8.0 mol %;
• ii) from 0.01 to 0.50 wt. %, relative to the total weight of the polypropylene composition (PC), of a first nucleating agent (NU1) having a structure according to formula (I):
• wherein R is selected from C2 to C6 alkyl groups;
• wherein R1 to R5 are independently selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, alkoxy, aryloxy, hydroxyalkyl, cycloalkyl, cycloalkenyl, aryl, substituted aryl, halide, amino and thioether and combinations thereof, and optionally any adjacent R1 to R5 are linked together to form a 5-membered or 6-membered ring;
• iii) optionally from 0.1 to 3000 ppm, relative to the total weight of the polypropylene composition (PC), of a second nucleating agent (NU2), being a polymeric nucleating agent;
• iv) optionally from 0.010 to 0.150 wt. %, relative to the total weight of the polypropylene composition (PC), of a fatty acid salt (FAS);
• and
• v) optionally from 0.01 to 5.0 wt. %, relative to the total weight of the polypropylene composition (PC), of further additives (A),
• wherein the individual amounts of the monophasic propylene-ethylene random copolymer (R-PP), the first nucleating agent (NU1), the optional second nucleating agent (NU2), the optional fatty acid salt (FAS), the optional further additives (A) and any further components add up to 100.0 wt. %,
• wherein the polypropylene composition (PC) has a haze value, as determined according to ASTM D 1003-07 on 60×60 mm2 plaques with a thickness of 1 mm prepared according to ISO 19069-2 at a temperature of 200° C., in the range from 0.0 to 15.0%.