| 摘要 |
PROBLEM TO BE SOLVED: To provide a coextrusion multilayered film capable of being used as a sealant film for pillow packaging, having easy opening properties permitting the easy opening due to the hand, capable of being heat-sealed even at a low temperature and improved in the lamination processability with a paper base material. SOLUTION: The coextrusion multilayered film is composed of a surface layer (A) based on a propylene resin (a) with a melting point of 150-170°C, an intermediate layer (B), which is composed of low density polyethylene (b1) and an ethylene/α-olefin copolymer (b2), and a seal layer (C) composed of a propylene/ethylene random copolymer (c1) with a melting point of 120-145°C and a butene-1-propylene random copolymer (c2). The surface layer (A), the intermediate layer (B) and the seal layer (C) are laminated in the order of (A)/(B)/(C). COPYRIGHT: (C)2007,JPO&INPIT
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