1, PPR raj yog dab tsi?
PP-R yeeb nkab, tseem hu ua peb hom polypropylene yeeb nkab, txais yuav random copolymerized polypropylene, uas yog extruded rau hauv cov yeeb nkab thiab txhaj rau hauv cov yeeb nkab fittings. Kev txhim kho thiab siv cov kav dej yas tshiab hauv Tebchaws Europe thaum ntxov xyoo 1990. PP-R yog ib tiam tshiab ntawm cov khoom siv kav dej hauv xyoo 1980s. Kwv yees li 5 feem pua PE tau randomly thiab uniformly polymerized (random copolymerization) nyob rau hauv cov saw molecular ntawm PP los ntawm roj-theem copolymerization txheej txheem. Nws muaj kev cuam tshuam zoo thiab ntev - lub sij hawm creep zog.
Lub interface ntawm PPR yeeb nkab txais cov khoom kub-kua tshuab, thiab cov kav dej tau ua tiav ua ke. Yog li ntawd, thaum lub installation siab dhau lawm, yuav tsis muaj dej to, thiab kev ntseeg siab yog siab heev.
2, PVC yeeb nkab yog dab tsi?
PVC yog tiag tiag vinyl polymer, thiab nws cov khoom yog cov khoom siv amorphous. Additives, stabilizers thiab lwm yam additives feem ntau yog siv nyob rau hauv PVC ua. Nws muaj tsis muaj flammability, siab zog, huab cua tsis kam thiab zoo heev geometric stability.
PVC muaj zog tiv thaiv oxidants, txo cov neeg ua haujlwm thiab muaj zog acids. Txawm li cas los xij, nws tuaj yeem corroded los ntawm concentrated oxidizing acids xws li concentrated sulfuric acid thiab concentrated nitric acid, thiab nws tsis haum rau kev sib cuag nrog aromatic hydrocarbons thiab chlorinated hydrocarbons. Cov yeeb nkab ua los ntawm cov khoom no hu ua PVC yeeb nkab.
3, Qhov sib txawv ntawm PPR yeeb nkab thiab PVC yeeb nkab
Ua ntej, cov khoom siv raw siv hauv kev tsim cov yeeb nkab PPR thiab PVC yeeb nkab yog txawv. PPR yeeb nkab yog ua los ntawm cov khoom siv copolymerized polypropylene, hos PVC yeeb nkab yog ua los ntawm cov khoom siv PVC. Cov khoom siv sib txawv ua rau cov khoom sib txawv.
Qhov thib ob, vim cov khoom siv sib txawv, PPR yeeb nkab thiab PVC yeeb nkab khoom muaj xim sib txawv. PPR cov kav dej ua los ntawm polypropylene muaj lub ntsej muag ci thiab zoo dua toughness. Cov kav dej ntawm lwm cov xim tuaj yeem ua tau raws li cov xim sib txawv masterbatch; Cov kav dej PVC feem ntau yog mis nyuj dawb nrog glossy nto, tab sis tsis muaj ntu ntu thiab cov khoom siv kuj tsis yooj yim.
Peb, phab ntsa thickness yog txawv. Yajie PPR yeeb nkab muab faib ua plaub ceg kav thiab rau ceg kav, nrog phab ntsa thickness ntawm 2.3 hli thiab 3.5 hli feem; Phab ntsa thickness ntawm PVC yeeb nkab nrog txoj kab uas hla ntawm 6 hli yog 2.
Plaub, cov nqi tsim khoom sib txawv. Vim yog cov khoom siv thiab phab ntsa tuab, cov nqi tsim khoom thiab tus nqi ntawm PPR yeeb nkab thiab PVC yeeb nkab kuj txawv. Feem ntau hais lus, tus nqi ntawm PPR raj yog qhov siab.
Thib tsib, kev siv sib txawv. Vim yog cov khoom siv, kev huv thiab kev nyab xeeb ntawm cov kav dej PVC tsis zoo li PPR kav. Hauv kev kho kom zoo nkauj hauv tsev, Yajie PPR kav feem ntau xaiv los ua cov kav dej, uas tuaj yeem siv rau cov kav dej txias thiab dej kub, thaum cov kav dej PVC feem ntau siv rau cov kav dej, thiab tsuas yog cov kav dej txias tuaj yeem siv tau.
4, Qhov twg zoo dua, PPR yeeb nkab lossis PVC yeeb nkab?
PPR tube is better. However, the scope of application is different and the characteristics are different. If it is only used for waterway reconstruction, cold water pipe, etc., PPR pipe must be better in terms of quality. But there is one thing we should pay attention to. There are many PPR tubes that say: do not install it openly. It can't be installed in the open here. It means that it is installed outdoors under the sunshine. If the PPR pipe is installed outdoors, it must be replaced once every two years, otherwise it will breed bacteria and greatly shorten the service life. Then it's not as good as PVC.