| 摘要 |
PURPOSE:A composition suitable for preventing effective warpage of molded article, providing a precise molded article having improved heat resistance, mechanical strength, dimensional stability, etc., obtained by blending a polypropylene having a specific molecular weight distribution with specific amounts of a crystal nucleating agent and mica. CONSTITUTION:100pts.wt. polypropylene having a ratio Mw/Mn of weight- average molecular weight (Mw) and number-average molecular weight (Mn) of <=5, preferably 2-4 and 0.5-100g/10min. melt flow index is blended with (A) 0.05-2.5pts.wt., preferably 0.1-1.5pt.wt. crystal nucleating agent (e.g., 1,3,2,4- dibenzylidene-D-sorbitol, etc.,) and (B) 5-150pts.wt., preferably 10-80pts.wt. mica (e.g., golden mica, white mica, etc.,) having 10-300mum average particle diameter and 10-100 aspect ratio. |
