| 摘要 |
PURPOSE: To improve the low-temp. heat sealability, hot tack properties, impact resistance, unsealability, and extrudability of a polyethylene resin compsn. for a laminated film by compounding a specific linear low-density PE resin, a linear medium- to high-density PE resin, and a high-pressure low-density PE resin. CONSTITUTION: This compsn. comprises 40-65wt.% linear low-density PE resin which is a copolymer produced by copolymerizing ethylene and 1-10mol% 4C or higherα-olefin using a metallocene catalyst and has a melt flow rate (190 deg.C) of 0.1-1.0g/10min. a density of 0.900-0.918g/cm<3> , and a mol.wt. distribution (Muslin) by GPC of 1.5-3.5, 30-55wt.% linear medium-to high-density PE resin which is an ethylene homopolymer or a copolymer of ethylene and 10 mol % or lower 3-20Cα-olefin and has a melt flow rate of 5.0-8.0, a density of 0.910-970g/cm<3> , and a mol.wt. distribution of 2.0-5.0, and 5-30wt.% high-pressure low-density PE resin which is an ethylene homopolymer or a copolymer of ethylene and 2-10mol% vinyl acetate and has a density of 0.915-0.924g/cm3.
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