Peb hom polypropylene, los yog random copolymerpolypropylene yeeb nkab, yog xa mus los ntawm cov ntawv luv PPR. Cov khoom siv no siv cov vuam kub, muaj cov vuam tshwj xeeb thiab cov cuab yeej txiav, thiab muaj cov yas siab. Tus nqi kuj tsim nyog heev. Thaum cov txheej txheej insulating ntxiv, cov rwb thaiv tsev kev ua tau zoo txhim kho thiab cov yeeb nkab phab ntsa, tshwj tsis yog cov junctions ntawm cov xov hlau sab hauv thiab sab nrauv, kuj zoo heev.

Nws feem ntau yog ua haujlwm hauv cov kav dej ua ntej faus rau hauv qhov tob tob lossis cov phab ntsa embedded.PPR cevmuaj kev pab cuam lub neej txog li 50 xyoo, yog tus nqi tsim nyog, ruaj khov hauv kev ua tau zoo, kub-tiv taus thiab kub-preserving, corrosion-resistant, du thiab tsis-scaling ntawm lub puab phab ntsa, muaj kev ruaj ntseg thiab txhim khu kev qha nyob rau hauv lub kav dej system. Txhawm rau kom ntseeg tau tias lub kaw lus muaj kev nyab xeeb, cov cuab yeej siv tau zoo thiab cov neeg ua haujlwm tsim nyog yog xav tau rau kev tsim kho, uas muaj cov txheej txheem siab.

Cov xim zoo nkauj, zoo ib yam - ntau dua li cov suab sib txawv hauv cov kav dej - muab rauPP-R kav dejib qho txaus nyiam nam 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 cov xim ntawm cov dej. yeeb nkab tsis muaj dab tsi ua nrog nws (tseem muaj lwm yam xim uas tau ntxiv nrog cov xim masterbatch). yog li ntawd, nws tsis cuam tshuam dab tsi xim cov yeeb nkab dej yog dab tsi.

Feem ntau, tsuas yog cov khoom siv ntshiab PP-R tuaj yeem siv los tsim cov khoom dawb. Piv txwv li, thaum lwm cov khoom siv xim ua tiav nrog cov xim masterbatches tau ua ke nrog cov khoom siv rov ua dua tshiab, cov ntaub ntawv pov tseg, thiab cov khoom siv ces kaum, 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. Cov khoom xim yuav tsis cuam tshuam los ntawm cov khoom siv, thiab lwm yam. Cov khoom siv sab hauv thiab sab nrauv yuav tsum tsis muaj qhov tsis zoo thiab tiaj tus; flaws xws li cua npuas, glaring depressions, grooves, thiab contaminants yog tsis tsim nyog.

Tag nrho cov ntaub ntawv yooj yim rau cov kav dej zoo PP-R yog PP-R. (tsis muaj additives). Ntshiab nyob rau hauv tsos, nrog ib tug du nto thiab xis tuav. Cov imitation PP-R kav dej zoo li supple. Feem ntau, cov khoom ntxhib yog feem ntau muaj xws li impurities; polypropylene yog qhov tseem ceeb ntawm cov kav dej PP-R. Cov kav dej tsis zoo tsw ntxhiab tsw txawv, qhov cov kav dej tsis zoo. Feem ntau, polyethylene es tsis yog polypropylene ua ke.

Qhov kub thiab txias rau PP-R kav yog nyob nruab nrab ntawm 260 thiab 290 ° C. Qhov zoo ntawm qhov vuam yuav ua kom zoo dua qub ntawm cov kub no. Cov khoom siv tau yooj yim nkag mus rau lub vuam tuag lub taub hau thaum vuam yog tias qhov vuam tsis zoo li qub. Tsis tas li ntawd, cov khoom lag luam fusion accumulator nodules yuav luag ua kua, qhia tias nws tsis tau tsim nrog cov ntaub ntawv PP-R tiag.

Cov khoom lag luam kuj tsis yog tsim los ntawm cov khoom siv PP-R tiag tiag yog tias cov vuam sib txuas nodules tuaj yeem txias thiab khov sai (feem ntau hauv 10 vib nas this). Qhov no yog vim PP-R muaj zog tiv thaiv tshav kub, uas txhais tau hais tias nws cov cua txias yuav qeeb qeeb.
Tshawb xyuas seb cov yeeb nkab fittings puas tau kos thiab yog tias lub puab txoj kab uas hla ntawm cov yeeb nkab yog distorted. Sab hauv txoj kab uas hla ntawm PP-R yeeb nkab zoo tsis tuaj yeem kos, thiab nws tsis yooj yim khoov.