PPR Yeeb Nkab Zoo Teeb Meem

PPR yog random copolymer polypropylene synthesized los ntawm (PP thiab PE) roj theem txoj kev. Nws cov yam ntxwv tshwj xeeb yog tias cov PE molecules tau sib txuas hauv PP molecules, thiab qhov hnyav molecular li ntawm 300, 000 txog 800, 000. Cov kav dej uas tsim los ntawm kev siv PPR raw cov ntaub ntawv, tseem hu ua random copolymer polypropylene kav, yog cov khoom siv yeeb nkab yas tsim thiab siv rau xyoo 1980s thiab thaum ntxov 1990s. Nrog nws cov kev ua tau zoo heev thiab ntau yam kev siv, nws tau nyob hauv ib qho chaw hauv kev lag luam yeeb nkab yas thiab yog ib qho khoom siv ntsuab thiab ib puag ncig zoo. Txawm li cas los xij, hauv kev ua lag luam nyob rau xyoo tas los no, kev tshuaj ntsuam ntawm cov saum toj no - tau hais txog PPR cov yeeb nkab yas tsis zoo kuj tau pom tias muaj ntau yam teeb meem hauv kev ua lag luam PPR yeeb nkab, thiab cov teeb meem no tau txwv kev loj hlob ntawm kev noj qab haus huv. PPR cov kav dej.