Heterophasic polypropylene composition

A heterophasic polypropylene composition comprising:

• a) 99.0-99.99 wt.-% of a heterophasic polypropylene copolymer and
• b) 0.01-1.0 wt.-% of a non-soluble nucleating agent,
• wherein the heterophasic propylene copolymer is characterized by comprising:
• i) 69.0 to 88.0 wt.-% of a crystalline matrix being a propylene homo- or copolymer, the crystalline matrix corresponding to the crystalline fraction (CF) determined according to ISO 6427-B in 1,2,4-trichlorobenzene at 160° C., having an intrinsic viscosity, IV (CF) in the range of 1.3 to 3.7 dl/g and containing 1.5 to 3.5 wt.-% comonomer and
• ii) 12.0 to 31.0 wt.-% of an amorphous propylene-ethylene elastomer, optionally comprising of C4-C12 alpha-olefin(s) as further comonomers, dispersed in the crystalline matrix (i), the amorphous propylene ethylene elastomer (ii) corresponds to the soluble fraction (SF) determined according to ISO 6427-B in 1,2,4-trichlorobenzene at 160° C., and has comonomer content of soluble fraction, (C2 of SF) in the range of 21.5 to 33.0 wt.-%,
• wherein i) and ii) add up to 100 wt.-%,
• characterized in that the heterophasic polypropylene composition has a crystallisation temperature (Tc) of at least 124° C., 2,1-erythro regio defects in an amount of 0.3 to 2.0 wt.-%, and an Intrinsic Viscosity of the soluble fraction, IV(SF), in the range of 2.2 to 4.5 dl/g.