PPR yas yeeb nkab yog dab tsi?
PPR yog ib qho qauv copolymer polypropylene synthesized los ntawm vapor theem txujci (PP thiab PE). Nws cov yam ntxwv muaj nuj nqi yog tias cov PE lwg me me muaj peev xwm muaj feem xyuam rau PP molecules nrog cov leb molecular ranging ntawm 300 txhiab rau 800 txhiab. Cov yeeb nkab khoom tsim los ntawm PPR tseem hu ua polyol copper tub rau polypropylene yeeb nkab, uas yog cov yeeb nkab khoom tsim thiab siv thaum kawg ntawm xyoo 1980 thiab ntxov ntxov 90s. Nrog nws tus kheej kev ua tau zoo thiab ntau hom kev siv, nws tau nyob hauv ib qho chaw hauv cov yeeb nkab ua lag luam, thiab nws pom zoo tias yog ib qho chaw tiv thaiv ntsuab. Tab sis xyoo tas los, txoj kev lag luam ua lag luam, PPR yas yeeb nkab muaj teeb meem zoo tshaj plaws, piv txwv tias, pom tias PPR cov yeeb nkab muaj ntau yam teeb meem, cov teeb meem no rau ntau yam txwv PPR cov yeeb nkab txoj kev txhim kho.
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