Peb hom polypropylene, lossis random copolymercov yeeb nkab polypropylene, yog xa mus rau los ntawm lub npe luv PPR. Cov khoom siv no siv kev vuam cua sov, muaj cov cuab yeej vuam thiab txiav tshwj xeeb, thiab muaj kev ywj pheej siab. Tus nqi kuj tsim nyog heev. Thaum ntxiv ib txheej rwb thaiv tsev, kev ua haujlwm rwb thaiv tsev zoo dua thiab phab ntsa yeeb nkab, tshwj tsis yog qhov sib txuas ntawm cov xov hlau sab hauv thiab sab nraud, kuj du heev.

Nws feem ntau yog siv rau hauv cov kav dej uas tau faus ua ntej hauv cov qhov dej tob lossis phab ntsa uas tau muab tso rau hauv.PPR yeeb nkabmuaj lub neej ua haujlwm txog li 50 xyoo, tus nqi tsim nyog, ruaj khov hauv kev ua haujlwm, tiv taus kub thiab khaws cia kub, tiv taus xeb, du thiab tsis lo rau ntawm phab ntsa sab hauv, muaj kev nyab xeeb thiab txhim khu kev qha hauv cov kav dej. Txhawm rau kom paub tseeb tias lub kaw lus muaj kev nyab xeeb, xav tau cov khoom siv zoo thiab cov neeg ua haujlwm tsim nyog rau kev tsim kho, uas muaj cov kev xav tau thev naus laus zis siab.

Cov xim mos mos, sib xws - es tsis yog cov xim sib txawv uas pom muaj nyob rau hauv lwm cov kav dej - muab rauCov yeeb nkab dej PP-Rib qho zoo nkauj thiab xim. (Cov neeg siv khoom feem ntau xav tias dawb yog xim zoo tshaj plaws rau cov kav dej PP-R, tab sis xim tsis yog qhov ntsuas rau kev txiav txim siab zoo; qhov zoo ntawm cov kav dej PP-R txawv ntawm cov kav dej PP-R, thiab xim ntawm cov kav dej tsis muaj feem cuam tshuam nrog nws (tseem muaj lwm yam xim uas tau ntxiv nrog cov xim masterbatch). Txhua yam xim tuaj yeem ua tau tsuav yog cov xim masterbatch nyob ntawd, thiab nws yuav tsis ua rau puas tsuaj lossis cuam tshuam rau qhov zoo ntawm PP. Yog li ntawd, R yog li ntawd, nws tsis muaj feem cuam tshuam dab tsi xim ntawm cov kav dej.

Feem ntau, tsuas yog cov khoom siv PP-R ntshiab xwb thiaj siv tau los tsim cov khoom dawb. Piv txwv li, thaum lwm cov khoom xim uas ua tiav nrog cov xim masterbatches raug sib xyaw nrog cov khoom siv rov ua dua tshiab, cov khoom pov tseg, thiab cov khoom ces kaum, cov xim ntawm cov khoom tsim los ntawm kev ntxiv cov khoom siv rov ua dua tshiab, cov khoom pov tseg, thiab cov khoom ces kaum tsis mos thiab tsis sib npaug. Cov xim ntawm cov khoom yuav tsis raug cuam tshuam los ntawm cov khoom siv, thiab lwm yam. Cov khoom sab hauv thiab sab nraud yuav tsum zoo nkauj thiab tiaj tus; qhov tsis zoo xws li cov npuas cua, qhov tob tob, cov grooves, thiab cov pa phem tsis raug lees txais.

Txhua yam khoom siv yooj yim rau cov kav dej PP-R zoo yog PP-R (tsis muaj cov khoom ntxiv). Ntshiab hauv qhov tsos, nrog rau qhov chaw du thiab xis nyob. Cov kav dej PP-R cuav zoo li mos. Feem ntau, cov khoom me me yooj yim muaj cov khoom tsis huv; polypropylene yog cov khoom tseem ceeb ntawm cov kav dej PP-R. Cov kav dej tsis zoo muaj ntxhiab txawv txawv, thaum cov kav dej zoo tsis muaj. Feem ntau, polyethylene es tsis yog polypropylene yog ua ke.

Qhov kub vuam rau cov kav dej PP-R feem ntau yog nruab nrab ntawm 260 thiab 290 ° C. Qhov zoo ntawm qhov vuam yuav raug xyuas kom zoo dua ntawm cov kub no. Cov khoom tuaj yeem nkag mus rau hauv lub taub hau vuam thaum lub sijhawm vuam yog tias cov txheej txheem vuam yog ib txwm muaj. Tsis tas li ntawd, cov khoom fusion accumulation nodules yog kua, qhia tias nws tsis yog tsim los ntawm cov khoom siv PP-R tiag tiag.

Cov khoom no kuj tsis yog ua los ntawm cov khoom siv PP-R tiag tiag yog tias cov nodules vuam tuaj yeem txias thiab khov sai (feem ntau hauv 10 vib nas this). Qhov no yog vim PP-R muaj cov nyhuv khaws cia kub zoo dua, uas txhais tau tias nws qhov txias yuav qeeb dua.
Xyuas seb cov yeeb nkab puas tau rub thiab seb lub cheeb sab hauv ntawm cov yeeb nkab puas raug cuam tshuam. Lub cheeb sab hauv ntawm cov yeeb nkab PP-R zoo tsis tuaj yeem rub tau, thiab nws tsis yooj yim khoov.