| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially stretched multilayered propylene polymer film excellent in concealability and heat-sealing strength. SOLUTION: The biaxially stretched multilayered propylene polymer film is constituted by laminating a coating film, which is obtained from a propylene/α-olefin random copolymer (A), on one side of a biaxially stretched film base material layer, which is obtained from a propylene copolymer composition composed of 70-95 mass% of the propylene/α-olefin random copolymer (A) with a melting point Tm of 120-155°C and 5-30 mass% of an inorganic compound powder (B), and further laminating a thermal welding layer, which is obtained from a propylene/α-olefin random copolymer (C) with a melting point Tm of 80-155°C, on the other side of the biaxially stretched film base material layer. COPYRIGHT: (C)2007,JPO&INPIT |
