Cov xim sib txawv ntawm PPR cov kav dej: Cov xim ntawm cov kav dej PPR nrog cov xim zoo yog mos thiab sib xws, tsis muaj qhov sib txawv. PPR kav dej feem ntau yog dawb, grey, ntsuab thiab daj. Cov neeg siv khoom feem ntau xav tias dawb yog qhov zoo tshaj plaws. Qhov tseeb, xim tsis yog tus qauv rau kev txiav txim qhov zoo. Qhov tseeb, qhov zoo ntawm PPR cov kav dej tsis muaj dab tsi cuam tshuam nrog cov xim ntawm cov kav dej PPR. Cov khoom yas feem ntau yog dawb thiab pob tshab (tseem muaj lwm yam xim uas tau ntxiv nrog xim masterbatch). Ntev npaum li cov xim masterbatch ntxiv, txhua yam xim tuaj yeem tsim tau, thiab xim masterbatch yuav tsis decomposed thiab yuav tsis hloov qhov zoo ntawm PPR. Xim kuj tsis muaj teeb meem. Raws li kev cai hauv tebchaws, PPR cov kav dej yuav tsum muaj lub teeb ci zoo. Hauv qhov no, grey lossis lwm yam kev ua haujlwm nruj yuav zoo dua, tab sis cov txiaj ntsig zoo li no tsuas yog muaj nyob rau hauv cov kav dej qhib thiab cov kav dej. Tag nrho cov kav dej rau kev txhim kho tsev yog tsaus. Yog li ntawd, tsis muaj leej twg hais tias grey zoo dua lwm yam xim. PPR raj yog opaque kiag li, thiab pseudo-PPR raj yog pob tshab me ntsis los yog ib nrab pob tshab. Feem ntau, cov khoom dawb tsuas tuaj yeem tsim nrog cov khoom siv PPR ntshiab. Piv txwv li, cov xim ntawm cov khoom tsim los ntawm kev ntxiv cov khoom siv rov ua dua tshiab, cov ntaub ntawv pov tseg, thiab cov ntaub ntawv ces kaum tsis yog mos thiab tsis sib xws, thaum lwm cov khoom siv xim ua tiav nrog cov masterbatches ntxiv nrog cov khoom siv rov ua dua tshiab, cov ntaub ntawv pov tseg, cov ntaub ntawv kaum, thiab lwm yam. Nws yuav tsis cuam tshuam. xim ntawm cov khoom. Qhov no yog vim li cas ntau cov tuam txhab lag luam uas tsom mus rau qhov zoo thiab tsom mus rau kev txhim kho hauv tsev muag khoom feem ntau siv cov khoom siv dawb. Sab hauv thiab sab nrauv ntawm cov khoom zoo PPR yuav tsum du thiab tiaj tus, thiab qhov tsis xws luag xws li huab cua npuas, pom kev nyuaj siab, grooves, thiab impurities tsis raug tso cai.
