| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated film which has a dramatical improvement in rigidity while maintaining a low-temperature heat sealability of a straight chain low-density polyethylene resin film, no curl causes, and further consists of a laminate of a polypropylene resin layer and an ethylene resin layer which can be both inexpensively manufactured. SOLUTION: The laminated film consists of three layers including an intermediate layer (A) disposed between two surface layers (B) for front and rear surfaces. The intermediate layer (A) comprises a crystallizable polypropylene polymerized using a metallocene catalyst and having an MFR of 1-30 g/10 min, a melt peak temperature (Tm) of 120-165°C and a 40°C orthodichlorobenzene soluble content of 2.0 wt.% or below, and surface layers (B) comprise a copolymer of an ethylene having an MFR of 0.1-20 g/10 min and a density of 0.860-0.925 g/cm<SP>3</SP>and a 3-12Cα-olefin polymerized using a metallocene catalyst. COPYRIGHT: (C)2006,JPO&NCIPI
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