| 摘要 |
The polyolefin composite film is excellent in low-temperature heat sealability, heat-sealing strength and transparency, and at least has surface layer [i]//intermediate layer [iii]//core layer [ii], wherein the surface layer [i] includes a propylene resin composition including 0-50 wt% of a specific propylene/±-olefin random copolymer (A) and/or a specific 1-butene/±-olefin copolymer (E), and 50-100 wt% of a propylene polymer (B) having a melting point of 120-170°C ((A), (E) and (B) in the surface layer totals 100 wt%); the core layer [ii] includes a propylene resin composition including 70-100 wt% of a crystalline polypropylene (C) having a melting point of 150-170°C, and 0-30 wt% of the copolymer (A) ((C) and (A) in the core layer totals 100 wt%); and the intermediate layer [iii] includes a propylene resin composition including 50-95 wt% of the crystalline polypropylene (C) and 50-5% of the polymer (B), the copolymer (A), and/or the copolymer (E) ((C), (B), (A) and (E) in the intermediate layer totals 100 wt%). |
