Qhov sib txawv ntawm PVC, UPVC thiab CPVC cov ntaub ntawv
Mar 31, 2022
Dab tsi yog qhov txawv ntawm PVC, UPVC thiab CPVC khoom? Puas yog UPVC / CPVC ob leeg PVC?
Yuav kom paub qhov txawv cov ntsiab lus ntawm cov khoom siv no, peb yuav tsum xub paub seb lawv yog cov khoom siv dab tsi.
1. PVC
PVC yog polymerized los ntawm vinyl chloride monomer (VCM). Cov khoom siv PVC muaj cov yam ntxwv tsis muaj tshuaj lom, tiv thaiv kev laus thiab cov kua qaub thiab alkali tsis kam, yog li nws tsim nyog rau kev siv cov kav dej tshuaj. PVC (PolyVinylChloride) feem ntau muaj 7 qib (SG1-SG7) raws li qhov nyuaj thiab kev ua haujlwm ntawm cov khoom, thiab qhov ceev yog li 1.4g / cm2. Cov khoom lag luam hauv qab SG4 feem ntau yog cov khoom muag muag, thiab ntau cov yas yas yuav tsum tau ntxiv thaum molding. Lawv feem ntau yog siv los ua cov tawv tawv, hlau thiab cable rwb thaiv tsev txheej, cov ntsaws ruaj ruaj, thiab lwm yam. SG5 thiab saum toj no yog cov khoom siv tawv, feem ntau yog siv los ua cov kav dej ntau yam, xws li cov kav dej, hluav taws xob, cov kav xa hluav taws xob thiab kev sib txuas lus thiab cov yeeb nkab fittings, ntau daim hlau, ntawv, profiles, thiab lwm yam.
PVC molding shrinkage tus nqi yog 0.6-1.5 feem pua, nrog cov khoom siv zoo, cov khoom siv hluav taws xob zoo, kev tua tus kheej, muaj zog acid thiab alkali tsis kam, tshuaj lom neeg ruaj khov, tsis tshua muaj nqi, yog qhov dav heev. siv General hom phiaj yas. Txawm li cas los xij, vim nws qhov ntsuas kub qis, qhov siab tshaj plaws yog nyob ib ncig ntawm 80 degree, uas cuam tshuam nws txoj kev loj hlob.
2. CPVC
CPVC yog cov khoom siv polymer hloov kho los ntawm chlorination ntawm polyvinyl chloride (PVC). Tom qab PVC resin yog chlorinated, cov ntsiab lus chlorine yog nce los ntawm 56.7 feem pua rau 63-69 feem pua, uas ua rau kom cov tshuaj ruaj khov thiab txhim kho cov khoom. Lub tshav kub tsis kam, acid, alkali, ntsev, oxidant thiab lwm yam corrosion.
3. UPVC
Cov khoom sib xyaw ua ke ntawm PVC raw cov ntaub ntawv thiab ib qho ntawm cov khoom siv ntxiv (tsis muaj plasticizers) yog hu ua rigid polyvinyl chloride (hu ua UPVC).
