| 摘要 |
PURPOSE: A polypropylene-based resin composition for bottle caps is provided to reduce manufacturing cost and to manufacture plastic bottle caps with high transparency and shock resistance without using metallocene ethylene-based resin. CONSTITUTION: A polypropylene-based resin composition for bottle caps comprises polypropylene-based resin mixed in single phase. The polypropylene- based resin mixed in single phase comprises 40-60 parts by weight of a first ethylene-propylene random copolymer which includes 0.5-3 weight% of ethylene and 40-60 parts by weight of a second ethylene propylene random copolymer which includes 6-15 weight% of ethylene based on 100.0 parts by weight of polypropylene based resin. A melt index of the polypropylene-based resin is 1-10g/10minute(230 deg. Celsius). |
