To make a high-speed processing possible and improve the processing stability and production efficiency in producing an extrusion lamination film by using polypropylene produced by using a metallocene catalyst.
Preferably, polypropylene used here satisfies the following requirements: the wt. average mol.wt. is 30,000-1,000,000; the isotactic pentad fraction is 0.900-0.949; the different bonding induced by 2,1-insertion reaction and 1,3-insertion reaction is 0-1 mol%; the ratio (Mw/Mn) of wt. average mol.wt. (Mw) to number average mol.wt. (Mn) is 1.5-3.8; and when the amount of components dissolved out of polypropylene into o-dichlorobenzene is measured at each temperature of o-dichlorobenzene while the temperature of o- dichlorobenzene is raised continuously or stepwise, the position of the main dissolution peak is at 95°C or higher and the amount of components dissolved out in a temperature range of the peak temperature ±10°C is at least 90% of the amount of the total components eluted at temperatures higher than 0°C.
SHIODA TSUTOMU
SAITO JUN
| JPH09241439A | 1997-09-16 | |||
| JPH091649A | 1997-01-07 | |||
| JPH08325327A | 1996-12-10 | |||
| JPH06100579A | 1994-04-12 | |||
| JP2000230086A | 2000-08-22 |
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