Dab tsi yog PVC?
Lub npe tag nrho ntawm PVC yog Polyvinylchlorid. Cov khoom tseem ceeb yog polyvinyl chloride, thiab lwm yam khoom xyaw ntxiv los txhim kho nws cov cua sov, toughness, ductility, thiab lwm yam. Cov txheej txheem saum toj kawg nkaus ntawm zaj duab xis saum npoo yog xim, cov khoom tseem ceeb hauv nruab nrab yog polyvinyl chloride, thiab cov txheej hauv qab yog rov qab. -coated nplaum.
Nws yog cov khoom siv hluavtaws uas nyiam, nrov thiab siv dav hauv ntiaj teb niaj hnub no. Nws txoj kev siv thoob ntiaj teb yog thib ob ntawm ntau yam khoom siv hluavtaws. Raws li kev txheeb cais, xyoo 1995 ib leeg, qhov ntim ntawm PVC hauv Tebchaws Europe yog kwv yees li ib lab tons, thaum nws noj yog 6.3 lab tons. Nyob rau hauv lub teb chaws Yelemees, kev tsim thiab kev siv ntawm PVC qhov nruab nrab yog 1.4 lab tons. PVC tau tsim thiab siv thoob ntiaj teb ntawm kev loj hlob ntawm 4%. Nyob rau hauv xyoo tas los no, kev loj hlob ntawm PVC nyob rau sab hnub tuaj Asia yog qhov tseem ceeb nyob rau ntau lub sijhawm, ua tsaug rau qhov kev xav tau sai rau kev tsim kho vaj tse hauv cov tebchaws Esxias yav Qab Teb. Ntawm cov ntaub ntawv uas tuaj yeem tsim cov duab peb sab, PVC yog cov khoom tsim nyog tshaj plaws.
PVC tuaj yeem muab faib ua mos PVC thiab tawv PVC. Ntawm lawv, nyuaj PVC nyiaj txog li 2/3 ntawm kev ua lag luam, thiab muag PVC nyiaj rau 1/3. Mos PVC feem ntau yog siv rau hauv pem teb, qab nthab thiab saum npoo ntawm tawv. Txawm li cas los xij, vim tias cov PVC mos muaj cov softeners (qhov no kuj yog qhov sib txawv ntawm cov mos PVC thiab tawv PVC), nws yooj yim ua nkig thiab nyuaj rau khaws cia, yog li nws qhov ntau ntawm kev siv yog txwv. Hard PVC tsis muaj softeners, yog li nws muaj qhov yooj yooj yim, yooj yim rau cov duab, tsis nkig, tsis muaj tshuaj lom thiab tsis muaj kuab paug, thiab muaj lub sijhawm cia ntev, yog li nws muaj kev txhim kho zoo thiab daim ntawv thov nqi. Hauv qab no, nws yog hu ua PVC. Cov ntsiab lus ntawm PVC yog lub tshuab nqus tsev yas-absorbing zaj duab xis, uas yog siv rau saum npoo ntim ntawm ntau hom panels, yog li nws tseem hu ua cov yeeb yaj kiab zoo nkauj thiab cov nplaum nplaum. Nws yog siv rau hauv ntau lub lag luam xws li cov khoom siv hauv tsev, ntim khoom, tshuaj, thiab lwm yam. Ntawm lawv, kev lag luam khoom siv hauv tsev suav nrog ntau tshaj plaws, 60%, ua raws li kev lag luam ntim khoom, thiab ob peb lwm yam kev lag luam me me.
