Cov txiaj ntsig ntawm cov kav dej PVC
1. Kev thauj mus los: Cov khoom siv UPVC muaj qhov tshwj xeeb qhov nqus uas tsuas yog ib feem kaum ntawm cov hlau cam khwb cia, ua rau nws tsis tshua muaj nqi rau nkoj thiab nruab.
2. UPVC muaj kua qaub thiab alkali tsis kam, tshwj tsis yog muaj zog acids thiab alkalis ze rau qhov chaw saturation lossis muaj zog oxidizing cov neeg ua haujlwm ntawm qhov siab tshaj plaws.
3. Tsis yog-conductive: Vim tias cov khoom siv UPVC tsis yog cov khoom siv hluav taws xob thiab tsis corrode thaum raug tam sim no lossis electrolysis, tsis tas yuav tsum ua haujlwm ntxiv.
4. Tsis muaj kev txhawj xeeb txog kev tiv thaiv hluav taws vim nws tsis tuaj yeem hlawv lossis txhawb kev combustion.
5. Kev teeb tsa yooj yim thiab pheej yig ua tsaug rau kev siv cov nplaum PVC, uas tau ua pov thawj tias muaj kev ntseeg siab thiab muaj kev nyab xeeb, yooj yim siv, thiab pheej yig. Txiav thiab sib txuas kuj yog qhov yooj yim heev.
6. Cov huab cua zoo heev thiab tiv thaiv kab mob thiab fungal corrosion ua txhua yam ruaj khov.
7. Kev tiv thaiv me me thiab siab txaus: cov phab ntsa hauv cov du ua kom cov kua dej tsis txaus, tiv thaiv cov khib nyiab los ntawm cov phab ntsa ntawm cov yeeb nkab du, thiab ua rau kev saib xyuas yooj yim thiab pheej yig.

Yas tsis yog PVC.
PVC yog cov yas siv ntau yam uas yuav siv tau rau ntau yam, suav nrog cov rooj tog zaum thiab cov tsev.
Yav dhau los, PVC yog cov yas siv ntau tshaj plaws hauv ntiaj teb thiab muaj ntau yam kev siv. Nws yog dav siv hauv cov khoom siv, cov khoom lag luam, cov khoom siv niaj hnub, cov tawv tawv hauv pem teb, cov vuas hauv pem teb, cov tawv hluavtaws, cov kav dej, cov xov hlau, thiab cov cables, ntim cov yeeb yaj kiab, lub raj mis, fibers, foaming cov ntaub ntawv, thiab lwm yam.

Lub Koom Haum Ntiaj Teb Kev Noj Qab Haus Huv Lub Koom Haum Thoob Ntiaj Teb rau Kev Tshawb Fawb Txog Kev Mob Cancer thawj zaug sau cov npe ntawm cov carcinogens thaum Lub Kaum Hli 27, 2017, thiab polyvinyl chloride yog ib qho ntawm peb hom carcinogens ntawm cov npe ntawd.
Amorphous polymer nrog cov kab ntawm cov qauv crystalline, polyvinyl chloride yog ib qho polymer uas hloov ib qho chlorine atom rau ib hydrogen atom hauv polyethylene. Cov ntaub ntawv no tau teeb tsa raws li hauv qab no: n [-CH2-CHCl] Feem ntau ntawm VCM monomers tau koom nrog hauv kev teeb tsa lub taub hau-rau-tail los tsim cov linear polymer hu ua PVC. Tag nrho cov pa roj carbon atoms tau koom ua ke los ntawm cov ntawv cog lus thiab raug teeb tsa hauv tus qauv zigzag. Txhua carbon atom muaj sp3 hybrid.

PVC molecular saw muaj cov qauv luv syndiotactic tsis tu ncua. Lub syndiotacticity nce thaum lub polymerization kub poob. Muaj cov qauv tsis ruaj khov nrog rau lub taub hau-rau-lub taub hau qauv, ceg saw, ob daim ntawv cog lus, allyl chloride, thiab tertiary chlorine hauv polyvinyl chloride macromolecular qauv, uas ua rau muaj qhov tsis zoo xws li thermal deformation tsis kam thiab kev laus tiv thaiv. Xws li qhov tsis zoo tuaj yeem kho tau tom qab pom tias muaj kev sib txuas.

Txoj kev sib txuas ntawm PVC:
1. Cov kua nplaum tshwj xeeb yog siv los koom nrog PVC yeeb nkab fittings; cov nplaum yuav tsum tau co ua ntej siv.
2. Lub qhov (socket) tivthaiv thiab PVC yeeb nkab yuav tsum tau muab ntxuav. Qhov chaw tsawg dua nyob nruab nrab ntawm cov qhov (sockets), qhov smoother ntawm cov pob qij txha yuav tsum yog. Tom qab ntawd, sib npaug txhuam cov kua nplaum rau hauv txhua lub qhov (socket) thiab ob zaug txhuam cov kua nplaum rau sab nrauv ntawm txhua lub qhov (socket). 40 vib nas this tom qab ziab, muab cov kua nplaum tso tseg thiab ua tib zoo saib seb lub sij hawm ziab yuav tsum tau nce los yog txo raws li huab cua.
3. Lub raj xa dej yuav tsum rov qab ua dua 24 teev tom qab kev sib txuas qhuav, cov kav dej yuav tsum tau muab tso rau hauv qhov kwj dej, thiab kev ntub dej yog txwv nruj heev. Thaum backfilling, txuag cov pob qij txha, sau thaj tsam ib puag ncig cov yeeb nkab nrog xuab zeb, thiab rov qab ua kom dav.
4. Txhawm rau txuas cov yeeb nkab PVC rau cov yeeb nkab steel, ntxuav qhov sib txuas ntawm cov yeeb nkab steel uas txuas nrog, ua kom sov kom soften cov yeeb nkab PVC (tsis tas hlawv), thiab tom qab ntawd ntxig cov yeeb nkab PVC rau hauv cov yeeb nkab steel kom txias. Qhov tshwm sim yuav zoo dua yog tias cov hoops ua los ntawm cov yeeb nkab steel tau koom ua ke.
PVC cov kav dejtuaj yeem txuas rau hauv ib qho ntawm plaub txoj kev:
1. Yog tias lub raj xa dej tau txhawb nqa kev puas tsuaj loj, ua tiavcov kav dejyuav tsum tau hloov. Kev siv ob-chaw nres nkoj txuas tuaj yeem siv los ua qhov no.
2. Txoj kev hnyav tuaj yeem siv los tiv thaiv cov kua nplaum kua nplaum. Nyob rau lub sijhawm no, cov yeeb nkab tseem ceeb cov dej ntws tawm, tsim kom muaj cov yeeb nkab tsis zoo ua ntej cov kua nplaum raug txhaj rau hauv lub qhov ntawm qhov chaw xau. Cov kua nplaum yuav raug rub mus rau hauv lub qhov hws vim yog lub raj xa dej tsis zoo, txwv tsis pub cov xau.
3. Lub hom phiaj tseem ceeb ntawm lub tes tsho kho cov txheej txheem yog qhov xau ntawm lub casing los ntawm cov kab nrib pleb me me thiab qhov. Tib lub caliber yeeb nkab yog tam sim no xaiv rau longitudinal txiav thiab qhov ntev ntawm 15 mus rau 500 px. Sab hauv ntawm lub casing thiab sab nrauv ntawm cov yeeb nkab kho yog txuas nrog ntawm cov pob qij txha raws li cov txheej txheem siv. Tom qab siv cov kua nplaum, qhov saum npoo yog roughened, thiab nws yog tom qab ntawd fastened mus rau qhov chaw ntawm cov xau.
4. Txhawm rau tsim cov tshuaj resin siv cov epoxy resin curing agent, siv cov iav fiber ntau. Nws yog tusyees woven rau saum npoo ntawm cov raj xa dej los yog cov xaim xaim tom qab tau tsau rau hauv cov tshuaj tov nrog iav fiber ntau, thiab tom qab kho, nws dhau los ua FRP.