Txhua Yam Koj Yuav Tsum Paub Txog Polyvinyl Chloride (PVC) Yas

Polyvinyl Chloride (PVC) yog ib qho ntawm ntau yam thiab siv cov khoom siv thermoplastic thoob ntiaj teb. Paub txog nws cov kav ntev, pheej yig, thiab kev tiv thaiv ib puag ncig, PVC yog siv rau ntau yam kev lag luam, los ntawm kev tsim kho mus rau kev kho mob. Hauv tsab xov xwm no, peb yuav tshawb xyuas seb PVC yog dab tsi, nws cov khoom, siv, thiab ntau ntxiv.

Polyvinyl Chloride (PVC) yog dab tsi?

Polyvinyl Chloride (PVC) yog cov khoom siv hluavtaws ua los ntawm polymerization ntawm vinyl chloride. Nws tau tsim thawj zaug hauv xyoo 1872 thiab pib ua lag luam hauv xyoo 1920 los ntawm BF Goodrich Company. PVC feem ntau yog siv rau hauv kev tsim kho kev lag luam, tab sis nws cov ntawv thov kuj tseem nthuav qhia, kev kho mob, textiles, thiab lwm yam.

PVC muaj nyob rau hauv ob hom thawj:

1. Rigid PVC (uPVC)- Unplasticized PVC yog cov khoom siv muaj zog, ruaj khov siv hauv cov kav dej, qhov rais thav duab, thiab lwm yam kev siv.
2. Flexible PVC- Hloov kho nrog cov yas yas, hloov tau yooj yim PVC yog mos, khoov tau, thiab dav siv hauv cov khoom xws li hluav taws xob rwb thaiv tsev, hauv pem teb, thiab cov kav dej hloov tau yooj yim.

Cov yam ntxwv ntawm Polyvinyl Chloride (PVC)

PVC cov khoom ua rau nws nyiam cov khoom siv rau ntau daim ntawv thov:

• Qhov ntom: PVC yog denser dua li ntau lwm yam yas, nrog rau ib qho kev nqus ntawm ib ncig ntawm 1.4.
• Durability: PVC tiv taus kev degradation los ntawm ib puag ncig yam, tshuaj, thiab UV rays, ua rau nws zoo tagnrho rau cov khoom siv ntev.
• Lub zog: Rigid PVC boasts zoo heev tensile lub zog thiab hardness, thaum saj zawg zog PVC tuav tau yooj yim thiab lub zog.
• Kev rov ua dua tshiab: PVC yog ib qho yooj yim recyclable thiab raug txheeb xyuas los ntawm resin code "3," uas txhawb kev sustainability.

Cov khoom tseem ceeb ntawm PVC

• Melting kubKub: 100 ° C txog 260 ° C (212 ° F txog 500 ° F), nyob ntawm cov additives.
• Tensile zog: Saj zawg zog PVC qhov sib txawv ntawm 6.9 mus rau 25 MPa, thaum PVC tawv tseem muaj zog ntawm 34 mus rau 62 MPa.
• Thaum tshav kub kub Deflection: PVC tuaj yeem tiv taus kub txog 92 ° C (198 ° F) ua ntej deforming.
• Corrosion Resistance: PVC tiv taus tshuaj lom neeg thiab alkalies, ua rau nws muaj kev xaiv ruaj khov rau ntau yam lag luam.

Hom PVC: Rigid vs. Flexible

PVC feem ntau muaj nyob rau hauv ob hom:

1. Rigid PVC(uPVC): Daim ntawv no yog ib qho nyuaj thiab feem ntau siv hauv kev tsim kho xws li cov kav dej thiab cov kav dej. Nws yog feem ntau hu ua "vin
2. Flexible PVC: Ua tiav los ntawm kev ntxiv cov yas yas, hloov pauv PVC yog siv rau hauv cov ntawv thov uas yuav tsum tau khoov lossis hloov tau yooj yim, xws li rwb thaiv tsev rau hluav taws xob cables, khoom siv kho mob, thiab hauv pem teb.

Vim li cas PVC siv ntau zaus?

PVC qhov nrov yog los ntawm nwstus nqi qis, muaj, thiabntau yam khoom. Rigid PVC yog tshwj xeeb tshaj yog nyiam rau cov qauv siv vim nws lub zog thiab durability, thaum hloov PVC lub softness thiab yooj ua rau nws zoo tagnrho rau cov khoom uas yuav tsum tau khoov, xws li kev kho mob tubing los yog flooring.

PVC ua li cas?

PVC feem ntau yog tsim los ntawm ib qho ntawm peb txoj kev polymerization:

• Suspension polymerization
• Emulsion polymerization
• Polymerization ntau

Cov txheej txheem no koom nrog cov polymerization ntawm vinyl chloride monomers rau hauv cov khoom polyvinyl chloride, uas tuaj yeem ua tiav rau hauv ntau yam khoom.

PVC hauv Kev Tsim Qauv: CNC Machining, 3D Printing, thiab Txhaj Moulding

Thaum PVC yog cov khoom siv nrov hauv ntau qhov kev lag luam, nws nthuav tawm qee qhov teeb meem thaum nws los txog rau kev tsim qauv thiab tsim khoom:

• CNC Machining: PVC tuaj yeem txiav siv cov tshuab CNC, tab sis nws yog abrasive thiab corrosive, yog li cov cuab yeej tshwj xeeb (xws li stainless-steel cutters) yuav tsum tau tiv thaiv kev hnav thiab tsim kua muag.
• 3D luam ntawv: PVC tsis yog feem ntau siv rau 3D luam ntawv vim nws corrosive xwm. Tsis tas li ntawd, nws tso tawm cov pa phem thaum cua sov, ua rau nws tsis tshua muaj cov khoom siv zoo tshaj plaws rau lub hom phiaj no.
• Txhaj Molding: PVC tuaj yeem ua tautxhaj tshuaj molded, tab sis cov txheej txheem no yuav tsum muaj qhov cua kom zoo thiab cov cuab yeej tiv thaiv corrosion vim qhov emission ntawm cov pa phem xws li hydrogen chloride (HCl).

Puas yog PVC Toxic?

PVC tuaj yeem tso tawmcov pa phemthaum kub los yog cua sov, tshwj xeeb tshaj yog nyob rau hauv industrial chaw xws li 3D printing, CNC machining, thiab txhaj tshuaj molding. Cov khoom tuaj yeem tawm cov pa phem xws litshuaj chlorobenzenethiabhydrogen chloride, uas tuaj yeem ua rau muaj kev phom sij rau kev noj qab haus huv. Nws yog ib qho tseem ceeb uas yuav tsum tau siv qhov cua kom zoo thiab cov cuab yeej tiv thaiv thaum ua haujlwm.

Qhov zoo ntawm PVC

• Nqi-zoo: PVC yog ib qho khoom siv pheej yig tshaj plaws muaj.
• Durability: Nws tiv taus qhov cuam tshuam, tshuaj lom neeg, thiab ib puag ncig degradation.
• Lub zog: PVC muaj lub zog tensile zoo, tshwj xeeb tshaj yog nyob rau hauv nws daim ntawv nruj.
• Ntau yam: PVC tuaj yeem molded, txiav, thiab tsim rau hauv ntau yam khoom, ua rau nws hloov tau rau ntau yam kev siv.

Disadvantages ntawm PVC

• Thaum tshav kub kub rhiab heev: PVC muaj qhov tsis zoo thaum tshav kub kub, uas txhais tau hais tias nws tuaj yeem hloov pauv lossis degrade ntawm qhov kub thiab txias tshwj tsis yog tias cov stabilizers ntxiv thaum lub sijhawm tsim khoom.
• Toxic Emissions: Thaum kub hnyiab los yog melted, PVC emits cov pa phem, yuav tsum tau ceev faj tuav thiab kev ruaj ntseg raws tu qauv.
• Corrosive Ntuj: PVC tuaj yeem ua rau cov khoom siv hlau thiab khoom siv yog tias tsis ua haujlwm zoo.

Xaus

Polyvinyl Chloride (PVC) yog ib qho khoom siv zoo kawg nkaus uas muaj qhov sib npaug zoo heev ntawm kev pheej yig, lub zog, thiab kev tiv thaiv ib puag ncig. Nws muaj ntau yam ntaub ntawv, nruj thiab hloov tau, tso cai rau nws siv nyob rau hauv ntau lub lag luam, los ntawm kev tsim kho mus rau kev kho mob. Txawm li cas los xij, nws yog ib qho tseem ceeb kom nkag siab txog cov kev pheej hmoo ntawm kev noj qab haus huv thiab cov teeb meem hauv kev ua cov PVC, tshwj xeeb tshaj yog hais txog nws cov emissions thiab corrosive xwm. Thaum kho kom raug, PVC yog cov khoom siv tseem ceeb uas txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev tsim khoom niaj hnub thiab kev tsim kho.