Block Copolymer, PPB-4228 ikoresha uburyo bwa Spheripol-II bwa Lyondell Basell. Ni polypropylene ya impact copolymer ifite ubushobozi bwo kurwanya ubushyuhe bwinshi, irwanya gukaraba, ifite ubushobozi bwo gushyushya neza, kandi ikagira ubushobozi bwo gukomera cyane.