Propylene resin composition and method for evaluating the same

摘要

There is provided a propylene resin composition having an Izod impact strength (23 DEG C., notched) of not less than 5 kJ/m2 and a flexural modulus of not less than 500 MPa, wherein as measured by electron spectroscopy for chemical analysis, the ratio of the valence electron spectral intensity at a bond energy of 16.5 eV to the valence electron spectral intensity at a bond energy of 13.5 eV, I 16.5/I 13.5, is in the range of 1.6 to 2.0. There is also provided a method for evaluating a propylene resin composition, which comprises subjecting a propylene resin composition to electron spectroscopy for chemical analysis to measure the ratio of the valence electron spectral intensity at a bond energy of 16.5 eV to the valence electron spectral intensity at a bond energy of 13.5 eV, I 16.5/I 13.5; and evaluating, based on the ratio, the amount of a rubber component present on the surface of the composition.