| 摘要 |
PURPOSE:To obtain a polymer, having a melt flow rate within a specific range and specific relation between the above-mentioned melt flow rate and Q values and capable of providing molded products having excellent thermoforming properties, heat distortion properties, rigidity and scuff resistance. CONSTITUTION:A polypropylene based polymer having 0.1-5g/10min melt flow rate and relation between the above-mentioned melt flow rate and Q values satisfying the formula (y is Q value; x is melt flow rate), and preferably >=0.945 crystallinity. The Q values are characteristic values indicating molecular weight distribution and the ratio (Mw/Mn) of weight-average molecular weight (Mw) to number-average molecular weight (Mn). The afore-mentioned polymer has improved drawdown properties and uniform extensibility and is suitable in the field of vacuum molding, air-pressure forming and press molding. |
