| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene biaxially stretched multilayered film excellent in adhesion, cutting properties, economical efficiency or the like, re duced in the generation amount of a harmful component at the time of incinera tion and using the same polypropylene type resin in its inner and outer layers and intermediate layer. SOLUTION: The polypropylene type biaxially stretched multilayered film has an A-layer, a B-layer and a C-layer in this order. Per 100 pts.wt. of a polypropylene resin of which the MFR at 30 deg.C is 0.5-15 g/10 min, the A-layer contains 1-15 pts.wt. of polybutene or/and polyisobutylene and the B-layer contains 1-20 pts.wt. of polybutene or/and polyisobutylene. The C-layer contains 1-15 pts.wt. of polybuene and the DSC fusion peak temperature of the resin composition of the B-layer exceeds the DSC fusion peak temperatures of the A- and C-layers. This multilayered film is obtained by simultaneously stretching a sheet consisting of the A-, B- and C-layers biaxially in an expansion ratio of 3-7 times.
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