| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene injection-molded article having high tensile elongation and scratch resistance.SOLUTION: The polypropylene injection-molded article has a K value of ≥0.05 and ≤0.35 calculated by following expression (I) based on an X-ray diffraction profile obtained by following procedure (1) and procedure (2). (1) The molded article is cut parallel to a plane including both of a first axis of a direction in which a molten resin in the manufacture of the molded article flows and a second axis intersecting the first axis in the thickness direction of the molded article to form a cut plane. (2) A region from a position where the surface of the molded article in the cut plane to a position in 100 μm depth is irradiated with X-Ray to measure the X-ray diffraction profile. The expression (I) is represented K value=H&bgr;/(H&bgr;+HαI+HαII+HαIII) (I) (H&bgr;, HαI, HαII and HαIII are respectively peak intensities corresponding to the crystalline diffraction of respective a &bgr;-crystal (300) plane, α-crystal (110) plane, α-crystal (040) plane and α-crystal (130) plane). |
