O le LyondellBasell Polypropylene grade Moplen HP550J B o se homopolymer e tafe feololo ma se mea masani.tufatufaina atu o le mamafa molecular ma ua fa'atulagaina i se afifi fa'aopoopo fa'amoemoe lautele. O le Moplen HP550J B oua mamanuina mo le gaosiga o ata tifaga e mafai ona liua i lipine ua fa'aloaloa mo galuega lalaga.