ETHYLENE COPOLYMER COMPOSITION FOR COATING WIRE

摘要

PURPOSE:To obtain the title composition improved in surface roughness, abra sion resistance, etc., by lowering the back pressure during molding by mixing at least two ethylene/butene-1 copolymers of different melt flow rates with an ethylene/propylene copolymer. CONSTITUTION:34-50wt.% high-MFR ethylene/butene-1 copolymer (A) of a densi ty of 0.961-0.969g/cm<3>, a melt flow rate(MFR) of 300-1000g/10min is mixed with 32-47wt.% low-MFR ethylene/butene-1 copolymer (B) of a density ot 0.925-0.940 g/cm<3> and an MFR of 0.04-0.20 g/10min and 10-25wt.% ethylene/propylene copoly mer (C) of a density of 0.955-0.962g/cm<3> and an MFR of 10-30g/10min to obtain the title composition of a density of 0.947-0.935g/cm<3> and an MFR of 0.90-2.0g/10min.