| 摘要 |
PROBLEM TO BE SOLVED: To prepare the subject film having a difference between the melting peak temperature and crystallization peak temperature determined by DSC within a specific range, high in fusing seal strength, wide in fusing seal temperature range, high in mechanical strength, by conducting a film formation of a crystalline polypropylene-based resin. SOLUTION: This film is prepared by conducting the film formation of a crystalline polypropylene-based resin such as a random propylene-based copolymer resin from 98.5-90.0wt.% of propylene and 1.5-10.0wt.% of ethylene and/or butene. For this film, the difference between the melting peak temperature (Tm) and the crystallization peak temperature (Tc): (Tm-Tc) determined by DSC falls within a range of 30-40 deg.C. |
