POLYPROPYLENE COATED STEEL TUBE

摘要

PURPOSE: To manufacture a polypropylene coated steel tube of superior resistance to impact and resistance to flaw at the specified temperature. CONSTITUTION: A polypropylene coated steel tube of superior resistance to impact at -45 deg.C and resistance to flaw at 100 deg.C is manufactured by laminating syndiotactic polypropylene single or a composition 5 composed of syndiotactic propylene of 100-70wt.% and an ethylene-propylene copolymer of 0-30wt.% and isotactic polypropylene 6 containing a pigment in the range of 0.1-7wt.% on the surface of a ground treated steel tube 1 through a modified polypropylene layer 4.