| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject film having excellent rigidity and gloss and comprising isotactic polypropylene obtained by polymerizing propylene by using a metallocene catalyst. SOLUTION: This film is composed of isotactic polypropylene obtained by polymerizing propylene or copolymerizing propylene withα-olefin other than a 2-12C propylene by using a catalyst composed of (A) a transition metal compound having at least a piece ofπ-electron conjugate ligand (usually metallocene) and (B) at least one kind of compound selected from (i) aluminoxane, (ii) an ionic compound forming an ionic complex material by reacting with the component A and (iii) a Lewis acid or composed of the component A, the component B and (C) an organic aluminum compound and having 1.5-3.8 ratio of (Mw/Mn) wherein Mw is a weight-average molecular weight and Mn is a number-average molecular weight and 150-168 deg.C melting point, and has >=120% gloss and >=1,900N/mm<2> Young's modulus. |
