PP yeeb nkab cov ntaub ntawv tshwj xeeb tau muab faib ua peb tiam: thawj tiam yog hloov kho los ntawm homopolymer polypropylene, hu ua PP-H, tiam thib ob yog tsim los ntawm PP thiab PE thaiv cov txheej txheem copolymerization, hu ua PP-B, thiab tiam thib peb yog hloov los ntawm random copolymer polypropylene thiab hu ua PP-R.
