POLYOLEFIN RESIN COMPOSITION FOR BLOW MOLDING, WITH GOOD FLAT CHARACTERISTIC, IMPACT STRENGTH AND TRANSPARENCY, AND PRODUCT USING THE COMPOSITION

摘要

PURPOSE: A polyolefin resin composition for blow molding and a product prepared by using the composition are provided, to improve the flat characteristic, the impact strength and the transparency. CONSTITUTION: The polyolefin resin composition comprises 100 parts by weight of a polyolefin resin mixture; 0.01-0.2 parts by weight of a radical generator; optionally 0.01-1 parts by weight of silica with a mean particle size of 1-10 micrometers; optionally 0-1 part by weight of a coloring agent; and optionally 0-1 part by weight of an organic nucleating agent comprising a sorbitol-based one and a rosin-based one. The polyolefin resin mixture comprises 40-80 wt% of a random polypropylene resin which comprises 2-10 wt% of ethylene, an α-olefin of C4-C10 or their mixture and whose melt index is 5 dg/min or less; and 20-60 wt% of an ethylene-propylene-α-olefin copolymer which comprises 10-30 wt% of propylene, an α-olefin or their mixture and whose melt index is 5 dg/min, or an ethylene-α-olefin copolymer which comprises 10-30 wt% of ethylene and whose melt index is 5 dg/min or less.