PPR yog ib qho random copolymer ntawm polypropylene synthesized los ntawm PP thiab PE ntawm cov pa roj-theem txoj kev. Nws cov yam ntxwv tus yam ntxwv yog PE molecules randomly txuas nyob rau hauv PP molecules, nrog molecular hnyav li ntawm 300,000 mus rau 800,000. Cov kav dej uas siv PPR raw cov ntaub ntawv tseem hu ua random copolymer polypropylene kav, ib hom ntawm cov yeeb nkab yas khoom tsim thiab siv nyob rau hauv lig 1980s thiab thaum ntxov 1990s. Nrog nws cov kev ua tau zoo heev thiab ntau yam kev siv, nws tau ruaj ntseg ib qho chaw hauv cov yeeb nkab yas ua lag luam thiab tau lees paub tias yog cov khoom lag luam ntsuab thiab ib puag ncig zoo.
Txawm li cas los xij, nyob rau xyoo tas los no, kev ua lag luam, raws li tau piav qhia los ntawm cov lus saum toj no - tau hais txog kev tsom xam ntawm PPR yas yeeb nkab teeb meem zoo, tau qhia ntau yam teeb meem hauv PPR yeeb nkab ua lag luam. Cov teeb meem no tau cuam tshuam txoj kev loj hlob zoo ntawm cov kav dej PPR.
