Block Copolymer, PPB-4228 e amohela ts'ebetso ea Spheripol-II ea Lyondell Basell. Ke polypropylene ea impact copolymer e nang le khanyetso e phahameng ea mocheso, khanyetso ea ho hlatsoa, ts'ebetso e ntle ea ho hatella, le ho tiea ho hoholo ha khanyetso.