| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene film for packaging with little interlaminar peeling when a bag forming article is opened and excellent in straight line cutting properties. SOLUTION: In a laminated polypropylene film with heat sealing properties and the straight line cutting properties which is prepared by successively laminating at least three layers of a heat seal layer (A) comprising a biaxially oriented polypropylene resin, a substrate layer (B) comprising a biaxially oriented polypropylene resin, and a uniaxially oriented polypropylene resin layer (C), interlaminar strength between the substrate layer (B) and the heat seal layer (A) is increased by incorporating a definite amount of an ethylene component into the substrate layer (B), and heat seal strength is restricted by specifying the thickness of the heat seal layer, to attempt to decrease the interlaminar peeling when the bag forming article is opened. COPYRIGHT: (C)2006,JPO&NCIPI
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