Lub ntsiab hom / PVC cov ntaub ntawv

PVC yuav muab faib ua PVC thiab PVC PVC. Ntawm lawv, nyuab PVC nyiaj rau li 2/3 ntawm kev ua lag luam, thiab cov nyiaj PVC muag rau 1/3. Feem ntau siv rau hauv PVC hauv pem teb, qab nthab, thiab tawv nqaij, tab sis vim lub mos mos muaj softening agent (uas yog qhov sib txawv ntawm cov PVC thiab cov PVC PVC), yooj yim los txhaws, tsis yoojyim txuag, yog li nws siv khwv tau txwv. PVC tsis muaj softener, yog li nws yog saj zawg zog, yooj yim rau cov duab, tsis txhav, tsis yog lom thiab tsis muaj paug, thiab muaj lub neej ntev txee. Yog li ntawd, nws muaj kev loj hlob zoo thiab daim ntawv muaj nqis. Tus txheej txheem ntawm PVC yog ib hom ntawm lub tshuab nqus hlau lim-absorbing, uas yog siv rau ntim ntim ntawm txhua yam ntawm cov khoom siv, yog li ntawd nws kuj yog hu ua hniav zaj duab xis thiab nplaum zaj duab xis, uas yog siv rau ntau lub lag luam xws li cov ntaub ntawv hauv tsev, ntim thiab tshuaj. Ntawm lawv, lub tuam tsev cov ntaub ntawv kev lag luam rau feem ntau feem, uas yog 60%, tom qab ntim kev lag luam, thiab lwm yam kev lag luam me me.

Cov tshuaj chlorine muaj nyob hauv cov roj molecules ntawm cov kua chloride. Vim yog cov dipole effect ntawm c-cl daim ntawv cog lus, nws yog ib yam khoom uas muaj zog polarity. PVC muaj zoo acid thiab alkali tsis kam, hnav-ua hauj, nplaim ua hauj thiab kev ua haujlwm, tab sis tsis muaj zog thiab thermal stability. Kev tshaj tawm, muaj plaub txoj kev npaj cov PVC: tshem tawm txoj haujlwm, ntau hom, emulsion method thiab txoj kev daws teeb meem. Kev ncua yog feem ntau, thiab feem ntau ntawm cov PVC resins siv los ntawm hom no. Raws li tus nqi ntawm cov yas limizer (feem ntau dibutyl phthalate thiab dioctyl phthalate), cov khoom muab faib ua cov tawv, cov khoom tawv thiab cov khoom muag muag. Rigid PVC muaj yas rau ntawm 10-25%, ib nrab ntawm PVC ntawm 30-40%, PVC PVC ntawm 40-70%. Tag nrho cov khoom siv hauv PVC yuav tsum muaj ib qho nyiaj ntawm tus stabilizer kom tsis txhob degradation thaum ua. Lub hnab yas hauv PVC cov khoom muag yog ua kom lub suab tawv zoo nkauj. Qhov kev xaiv ntawm cov yas limizer los yog sib tov ntawm cov yas lim hniav no kawg nyob ntawm qhov khoom yam khoom ntawm cov khoom tiav. Feem ntau cov yas tho hniav tseem tuaj yeem ua lub luag haujlwm ntawm kev tua AIDS rau qee yam. Lub tshuab ua yas yuav txo cov kub thiab txhaws ntawm qhov ntxhib, thiab tiv thaiv kom tsis txhob rov los ntawm cov hlau ntawm cov khoom ua haujlwm.