Short chain ramped polypropylene.

Polypropylene having a) soluble xylene (XS) of at least 0.5% by weight and b) a strain hardening coefficient (SHI @ 1s-1) of at least 0.15 measured by a deformation rate of depsilon / dt from 1.00 s-1 at a temperature of 180 ° C, in which the strain hardening coefficient (SHI) is defined as the slope of the logarithm in base 10 of the tensile stress growth function (lg (eta E + )) as a function of the base 10 logarithm of the Hencky deformation (lg (epsilon)) in the Hencky deformation range between 1 and 3.