1. Cov khoom siv tseem ceeb sib txawv
Qhov sib txawv tseem ceeb ntawm PET thiab PVC cov yeeb yaj kiab zoo nkauj nyob hauv lawv cov tshuaj muaj pes tsawg leeg, uas txiav txim siab lawv cov khoom muaj nqis. PET yog cov thermoplastic polymer ua los ntawm ethylene glycol thiab terephthalic acid, ib yam ntawm cov khoom siv polyester. Nws yog ib tug linear polymer nrog ib tug high℃ntawm crystallinity, muab nws zoo heev structural stability. Ntawm qhov tod tes, PVC yog vinyl polymer synthesized los ntawm vinyl chloride monomers. Nws cov qauv molecular muaj cov tshuaj chlorine atoms, uas ua rau nws cov yam ntxwv tshwj xeeb xws li nplaim taws retardancy tab sis kuj cuam tshuam rau nws qhov kev ua haujlwm ib puag ncig.
2. Kev ua haujlwm ib puag ncig
Qhov no yog ib qho tseem ceeb tshaj qhov sib txawv ntawm ob cov ntaub ntawv. PET cov yeeb yaj kiab zoo nkauj feem ntau pom tau tias yog ib puag ncig zoo dua. PET yog cov khoom siv rov ua dua tshiab, thiab nws cov txheej txheem tsim tawm qis qis ntawm cov organic sib txuas (VOCs). Siab- cov yeeb yaj kiab PET zoo tuaj yeem ua tau raws li cov qauv kev nruj ib puag ncig xws li EU REACH thiab US CARB, ua rau lawv tsim nyog rau eco-paub qhov chaw nyob sab hauv xws li tsev, tsev kawm ntawv, thiab tsev kho mob.
Nyob rau hauv sib piv, PVC zoo nkauj zaj duab xis muaj ntau controversial ib puag ncig cuam tshuam. Kev tsim cov PVC cuam tshuam nrog kev siv cov yas yas thiab cov stabilizers, qee qhov yuav tso tawm cov khoom tsis zoo (xws li phthalates) dhau sijhawm. Tsis tas li ntawd, PVC yog qhov nyuaj rau kev rov ua dua tshiab, thiab kev pov tseg tsis raug (xws li, incineration) tuaj yeem tsim cov pa phem xws li dioxins. Txawm hais tias muaj "eco-cov yeeb yaj kiab PVC" muaj uas siv tsis yog- cov tshuaj lom neeg muaj pes tsawg leeg thiab qis- VOC cov qauv, lawv qhov chaw ib puag ncig tag nrho tseem siab dua li ntawm PET zaj duab xis.
3. Lub cev thiab cov cuab yeej cuab tam
Cov yam ntxwv ntawm lub cev ntawm PET thiab PVC zaj duab xis sib txawv, cuam tshuam rau lawv cov kav ntev thiab siv tau hauv cov xwm txheej sib txawv:
- Hardness and Wear Resistance: PET films inherently harder, with better scratch resistance and wear resistance. Lawv tuaj yeem tiv taus kev sib txhuam thiab kev cuam tshuam me me yam tsis muaj kev puas tsuaj yooj yim, ua rau lawv zoo tagnrho rau cov chaw tsheb loj -. PVC zaj duab xis, thaum muab kev hnav tsis zoo, feem ntau softer dua PET. Txawm li cas los xij, PVC qhov kev hloov pauv tau zoo dua, tso cai rau nws hloov kho kom zoo dua rau qhov chaw nkhaus lossis qhov tsis sib xws (xws li, embossed rooj tog panels).
- Thaum tshav kub kub Resistance: PET zaj duab xis muaj cov cua kub zoo heev, nrog rau qhov kub thiab txias ntawm 100-120 degree. Lawv tsis tshua muaj kev deform lossis tsis muaj xim thaum raug kub hnyiab (xws li tshav ntuj ncaj qha lossis qhov sib thooj rau cov khoom siv cua sov). PVC zaj duab xis muaj cov cua kub qis dua, feem ntau yog siv qhov kub thiab txias ntawm 60-80 degree. Cov cua kub ntau dhau tuaj yeem ua rau lawv muag, ntsws, lossis tawm tsw.
- Waterproof thiab Moisture Resistance: Ob qho yeeb yaj kiab muaj kev ua haujlwm tsis zoo. PVC zaj duab xis, vim muaj cov tshuaj chlorine atoms, muaj cov dej noo zoo dua me ntsis thiab tsis tshua muaj pwm loj hlob hauv qhov chaw ntub dej (piv txwv li, chav dej, chav ua noj). PET zaj duab xis kuj tiv thaiv dej nkag tab sis yuav tsis ua tau zoo li PVC nyob rau hauv ntev -lub sij hawm siab - av noo.
- Transparency thiab Gloss: PET films muab siab dua transparency thiab glossiness, ua rau lawv haum rau cov ntaub ntawv uas ib tug ntshiab, iav -zoo li tag (xws li, hniav iav, siab -gloss rooj tog). PVC cov yeeb yaj kiab muaj ntau yam kev xaiv gloss (los ntawm matte mus rau siab -gloss) tab sis feem ntau muaj qhov pom tseeb qis dua PET, uas tuaj yeem cuam tshuam qhov pom tseeb ntawm cov qauv hauv qab.
4. Kev ua haujlwm thiab kev teeb tsa
Cov txheej txheem ua tiav rau PET thiab PVC cov yeeb yaj kiab zoo nkauj sib txawv, cuam tshuam rau kev tsim kho thiab tus nqi:
PVC zaj duab xis yog yooj yim rau txheej txheem thiab nruab. Lawv muaj qhov hloov tau zoo thiab tuaj yeem txuas rau cov substrates (xws li ntoo, MDF, lossis hlau) siv ob qho tib si kub - nias lossis txias - nias txoj kev. Qhov qis melting point ntawm PVC tso cai rau kev sib txuas sai dua, txo cov sij hawm tsim kho thiab cov nqi zog. Qhov no ua rau cov yeeb yaj kiab PVC yog qhov kev xaiv nrov rau loj - cov haujlwm tsim kho.
PET zaj duab xis, ua nyuaj dua thiab tsis hloov pauv, yuav tsum tau ua tiav ntau dua. Kub- nias yog txoj kev nyiam rau kev txhim kho PET cov yeeb yaj kiab, vim nws ua kom muaj kev sib raug zoo dua thiab tsis txhob muaj npuas lossis tsis sib haum. Kev ua haujlwm siab dua thiab cov kev xav tau siab txhais tau hais tias PET zaj duab xis installation yog qhov xav tau ntau dua thiab yuav raug nqi zog ntau dua
