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Mitsubishi Petrochemical Co Ltd
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Mitsubishi Petrochemical Co Ltd
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Application filed by Mitsubishi Petrochemical Co LtdfiledCriticalMitsubishi Petrochemical Co Ltd
Priority to JP23980ApriorityCriticalpatent/JPS5698214A/en
Publication of JPS5698214ApublicationCriticalpatent/JPS5698214A/en
PURPOSE: To prepare an automobile bumper having high impact strength and surface hardness, and excellent dimensional accuracy and heat resistance, by using a specific propylene block copolymer as a resin material.
CONSTITUTION: The objective bumper is repared by using, at least as a part of the bumper, a resin material having a melt flow rate of 0.1W30g/10min and composed of (A) 50W99pts.wt. of a random copolymer of propylene and a 5W12C α-olefin and (B) 50W1pts.wt. of a segment of an ethylene homopolymer or a random copolymer of ethylene and a 5W12C α-olefin and if necessary, propylene.