PP injection molding refers to PP that can be used for injection molding, generally, PP with melt index above 1;
PP*** poly means that there are two monomers in PP, of course, propylene is the main monomer, and some of them are ethylene. Usually there are two kinds of PP, one is random * * * poly, and the other is block * * * poly.
For more professional knowledge of plastic materials, you can visit the X-Tough Plastic Forum, and Baidu search "talktpe" to find X-Tough!