Dab tsi khoom yog ppr kub yaj lub raj ua los ntawm

PPR cov yeeb nkab kub-yaj yog qhov cov lus luv luv ntawm tripropylene polyethylene, tseem hu ua random copolymer polypropylene yeeb nkab. PPR yog ib qho kev luam ntawv copolymer polypropylene sib xyaw los ntawm (PP thiab PE) roj theem txujci. Nws cov qauv yog pom los ntawm cov kev sib txuas ntawm cov qib PE molecules hauv PP Ntawm cov lwg me me, qhov hnyav nyhav li ntawm 300,000 txog 800,000. Cov kav dej tsim tawm los ntawm PPR raw khoom tseem yog hu ua random copolymer polypropylene kav. Lawv yog cov yas yeeb nkab khoom tsim thiab siv hauv xyoo 1980s thiab pib xyoo 1990. Nrog nws tus kheej ua tau zoo tshaj plaws thiab siv ntau yam, nws tau nyob hauv qhov chaw lag luam yas yeeb nkab thiab tau lees paub tias yog cov khoom lag luam ntsuab thiab ib puag ncig.