| 摘要 |
PURPOSE: Provided is a polypropylene resin composition for extrusion coating, which is improved in the high speed processability, the neck toughness, the stiffness and the heat adhesive strength. CONSTITUTION: The polypropylene resin composition comprises 100 parts by weight of a resin mixture which consists of (i) 77-92 wt% of a propylene-ethylene-butene-1 copolymer resin with a melting point of 130-145 deg.C and a melt index of 5-20 g/10 min(230 deg.C, 2.16 kg), (ii) 3-13 wt% of a low density polyethylene resin with a density of 0.920 g/cm¬3 or less and a melt index of 5-10 g/10 min(190 deg.C, 2.16 kg), and (iii) 5-10 wt% of a polybutene resin with a molecular weight of 400-1,000; and 0.01-0.04 parts by weight of a decomposing agent for cross-linking. The polypropylene resin composition has a melt index of 20-35 g/10 min(230 deg.C, 2.16 kg).
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