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Polypropylene random copolymer (PP-R) yeeb nkab tau dhau los ua cov kav dej nrov thiab raug nqi. PP-R cov kav dej yog lub teeb yuag, ruaj khov thiab muab lub sijhawm ntev, txhim khu kev qha thiab corrosion-resistant piping tov rau ntau yam kev siv. PP-R cov kav dej yog tsim los ua kom muaj kev ntseeg siab ntawm qhov kub txog li 90 degree rau cov kav dej siab thiab mus txog 110 degree rau tag nrho lwm yam kev siv.
Qhov kub tsis kam ntawm PP-R yeeb nkab yog txiav txim siab los ntawm cov khoom siv polymer. Feem ntau, qhov siab tshaj plaws kev khiav hauj lwm kub ntawm polypropylene nws txawv ntawm 95 degree thiab 135 degree, nyob ntawm seb cov qib thiab tus nqi ntawm comonomer ntxiv. PP-R cov kav dej muaj cov copolymer ntawm propylene thiab ethylene uas muab cov yeeb nkab ua haujlwm tshwj xeeb hauv cov ntsiab lus ntawm qhov kub thiab txias.
Cov qauv molecular ntawm PP-R kav dej muaj cov pa roj carbon qaum, uas ua rau lawv zoo heev hauv kev tiv thaiv qhov kub thiab txias. Cov pob txha carbon yog pom nyob rau hauv daim ntawv ntawm polyethylene, uas yog ib tug heev crystalline polymer. Lub siab crystallinity ntawm PP-R ua rau nws tiv taus kub thiab siab hloov.
Lub melting point ntawm PP-R yeeb nkab yog kwv yees li 160 degree. Qhov no txhais tau hais tias, txawm nyob rau ntawm qhov kub thiab txias, lub polymer tsis tawg, deform los yog tsim dips los yog bulges. PP-R kav dej muaj kev ruaj ntseg zoo heev, uas txhais tau hais tias lawv tsis nthuav lossis cog lus loj vim qhov kub thiab txias.
Kev sib xyaw ua ke ntawm cov khoom no ua kom ntseeg tau tias cov kav dej PP-R tuaj yeem ua haujlwm tau zoo ntawm qhov kub thiab txias yam tsis muaj degradation lossis tsis ua haujlwm. Yog li ntawd, cov kav dej no yog qhov zoo tagnrho rau ntau yam kev siv uas yuav tsum tau muaj qhov kub thiab txias.
PP-R kav dej muaj ntau yam kev siv, suav nrog cov dej kub thiab dej txias, cua sov hydronic, siv tshuaj lom neeg thiab kev lag luam, thiab compressed cua tshuab. Cov kav dej no muaj cov tshuaj tiv thaiv zoo heev thiab tsis cuam tshuam los ntawm cov tshuaj feem ntau.
PP-R yeeb nkab tshuab yog cov resistant rau corrosion thiab tsis tas yuav kim corrosion tiv thaiv txheej. Qhov no yog vim hais tias cov khoom siv polymer yog inherently corrosion-resistant thiab du sab hauv-bore ntawm cov yeeb nkab tsis ua hauj lwm scale thiab av buildup.
PP-R cov kav dej kuj tseem tiv taus qhov kev loj hlob ntawm microbiological, uas txhais tau hais tias lawv huv thiab nyab xeeb rau cov dej xa dej. Cov kav dej no yooj yim rau nruab thiab xav tau kev saib xyuas tsawg. Cov txheej txheem kev teeb tsa suav nrog vuam lossis fusion, uas tsim kom muaj kev sib txuas tsis sib haum thiab tshem tawm cov pob qij txha uas tsis sib haum xeeb.
Hauv cov ntsiab lus, qhov ntsuas kub ntawm PP-R yeeb nkab yog mus txog 90 degree rau cov kav dej siab thiab 110 degree rau lwm yam kev siv. PP-R cov kav dej yog lub teeb yuag, ruaj khov thiab muab lub sijhawm ntev, txhim khu kev qha thiab corrosion-resistant piping tov rau ntau yam kev siv. Cov kav dej no muaj cov tshuaj tiv thaiv zoo heev thiab tiv taus corrosion, microbiological kev loj hlob, thiab feem ntau cov tshuaj. PP-R yeeb nkab tshuab yog huv si, yooj yim rau nruab thiab tswj, thiab yuav tsum tau saib xyuas tsawg heev.
PP-R cov kav dej yog cov kav dej uas muaj txiaj ntsig zoo uas muaj txiaj ntsig zoo dua li cov kav hlau kav ib txwm muaj. PP-R kav dej yog ib qho kev nqis peev zoo rau txhua daim ntawv thov uas yuav tsum muaj kev txhim khu kev qha thiab kav ntev. Ntxiv nrog rau kev ua tau zoo ntawm qhov kub thiab txias, lawv muaj ntau yam txiaj ntsig uas ua rau lawv xaiv zoo rau ntau yam kev siv.
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