Multi-branched polypropylene

Polypropylene having a multi-branching index (MBI) of at least 0.15, wherein the multi-branching index (MBI) is defined as the slope of strain hardening index (SHI) as function of the logarithm to the basis 10 of the Hencky strain rate/lg(dε/dt)), wherein

• dε/dt is the deformation rate,
• ε is the Hencky strain, and
• the strain hardening index (SHI) is measured at 180° C., wherein the strain hardening index (SHI) is defined as the slope of the logarithm to the basis 10 of the tensile stress growth function (lg(ηE+)) as function of the logarithm to the basis 10 of the Hencky strain (lg(ε)) in the range of Hencky strains between 1 and 3.