| 摘要 |
PURPOSE: To improve a draw ratio of syndiotactic polypropylene by adding isotactic polypropylene, and enlarge the range of drawing temperature by adding syndiotactic polypropylene to isotactic polypropylene. CONSTITUTION: A polypropylene resin composition composed of 1-99 pts.wt. of syndiotactic polypropylene wherein peak strength observed as about 20ppm which is measured with<13> C-NMR is at least 0.5 of peak strength assigned to a methyl group of total propylene unit, and 99-1 pts.wt. of isotactic polypropylene of which the peak strength is at least 0.9 of peak strength observed as about 22ppm which is measured with<13> C-NMR, is at least mono- axially oriented. Thereby, a polypropylene film can be obtained by drawing at least axially a raw fabric sheet obtained by melt extrusion of polypropylene resin composition within a range of 200-300 deg.C. |
