| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated film for a heavy duty packing bag which is excellent in characteristics including heat sealing properties, transparency, surface glossiness, and printability, can demonstrate high goods appeal properties, and can be used appropriately for the heavy duty packing bag such as a rice bag or a fertilizer bag. SOLUTION: The laminated film is formed by coextruding polyethylene and polypropylene. The polyethylene forming the inner layer of the laminated film is polymerized by a metallocene catalyst, and the polypropylene forming the outer layer of the laminated film is random-polymerized by a metallocene catalyst. In the laminated film for the heavy duty packing bag, the polyethylene polymerized by the metallocene catalyst is mixed in a ratio of 5-50 wt.% in the polypropylene forming the outer layer. COPYRIGHT: (C)2005,JPO&NCIPI
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