| 摘要 |
PURPOSE:To obtain exceedingly strong film by using propylene ethylene random copolymer in which ethylene content is 6 to 17 mol% when measured by C<13>-NMR, the block index is 1.1 or less, the MLMFI/MFI ratio is 10 to 16 and the MFI is 1 to 30g/min. CONSTITUTION:By the general method of manufacture a water-cooled inflation film is manufactured from propylene ethylene random copolymer resin having characterstics that the ethylene content obtained by the C<13>-NMR method is 6 to 17 mol%, the block index calculated by the C<13>-NMR method and defined below is 1.1 or less, the MFI (230 deg.C, load 2.16kg) is 1 to 30g/min, the ratio of MLMFI (230 deg.C, load 10.0kg) to MFI (230 deg.C, load 2.16kg) is 10 to 16. In this manner, it is made possible to obtain inflation film composed of polypropylene resin excellent in film strength, especially, impulse resistance at cold temperatures and further transparency. |
