Propylene polymer with high crystallinity

摘要

A composition suitable for the manufacture of films having a very advantageous stiffness-processability-balance comprising a high crystalline propylene polymer having
a) T P of at least 122.5 °C and
b) T w of at least 118 °C, whereby
the T P and the T w are calculated from the temperature rising elution fractionation (TREF)-function of the propylene polymer in the range of 80 to 140 °C, wherein
T P is the maximum temperature of the TREF-function;
T w the weight average temperature of the TREF-function defined by T W = ˆ‘ c i ‹ T i ˆ‘ c i
T i the temperature at which the concentration c i of an elute is determined; and
c i the concentration of the elute at the temperature T i .