| 摘要 |
PURPOSE:To provide the subject product having a high strength, a large elongation at breakage and excellent energy output characteristics by melt-extruding an ultrahigh mol.wt. PP composition comprising ultrahigh mol.wt. PP and an alpha-olefinic polymer in a specific ratio and subsequently drawing the extruded product. CONSTITUTION:An ultrahigh mol.wt. PP composition comprising 50-99 pts.wt., preferably 60-90 pts.wt., of ultrahigh mol.wt. PP having an intrinsic viscosity [eta]of >=5dl/g, preferably >=10dl/g, and 1-50 pts.wt., preferably 10-40 pts.wt., of an alpha-olefinic polymer derived from a 4-18C alpha-olefin and an intrinsic viscosity [eta]of >=5dl/g, preferably >=12.5dl/g, is melt-extruded and subsequently drawing the extruded product. |
