Muaj ntau hom yas, xws li PE, PP, PS, ABS, PC, PVC, thiab lwm yam. Feem ntau cov yas pov tseg yog nyob rau hauv lub xeev tsis degradable, uas tuaj yeem yooj yim ua rau ib puag ncig muaj kuab paug, ua rau hluav taws kub, pov tseg lub zog, thiab rov siv dua thiab siv tau yooj yim. txheej txheem tseem ceeb heev. Cov xim pleev xim muaj xws li PU xim, xim roj hmab, xim UV, thiab lwm yam. Muaj ntau txoj hauv kev los tshem tawm cov xim qub qub, feem ntau siv xws li: xim tshem tawm, tshuaj alkali, xim tshem tawm, organic hnyav, nplaim taws, phau ntawv chipping, sandblasting, thiab lwm yam. Nyob rau hauv cov tsoos yas granulation tshuab ua, cov yas yuav tsum tau crushed ua ntej, uas yuav ua puas lub substrate. Tom qab tev tawm cov xim, nws kuj yuav tsum tau hloov kho, uas ua rau kom tus nqi thiab txheej txheem.
Kawm txog cov xim tshem tawm uas tsis ua rau muaj kev puas tsuaj rau lub substrate thiab tsis tas yuav rov ua dua yog qhov tseem ceeb dua. Cov tshuaj pleev xim tshiab uas muaj txiaj ntsig zoo tuaj yeem ua rau muaj txiaj ntsig zoo rau cov teeb meem uas muaj nyob rau hauv cov txheej txheem ib txwm muaj. Kev siv cov xim pleev xim zoo rau kev tshem tawm cov xim muaj qhov zoo ntawm cov nqi qis heev, cov nyhuv zoo, kev ua haujlwm siab, thiab tsis muaj volatility.
Cov kuab tshuaj uas ua rau cov xim tev tawm yog siv los tiv thaiv kev lag luam. Los ntawm kev siv cov organic solvents nyob rau hauv cov xim Remover kom o feem ntau ntawm cov txheej, cov nyhuv ntawm tshem tawm cov laus coatings ntawm lub substrate nto yog tiav.
Thaum cov xim tshem tawm nkag mus rau hauv cov khoom siv hluav taws xob sib txawv ntawm cov txheej txheem polymer, nws yuav ua rau cov polymer o, ua rau cov zaj duab xis ntim mus tas li. Thaum lub sij hawm tus txheej txheem ntawm nce lub polymer ntim ntawm cov zaj duab xis, kev ntxhov siab sab hauv kuj yuav raug generated, weakening thiab ua puas lub adhesion ntawm cov zaj duab xis rau lub substrate. Tom qab cov yeeb yaj kiab nthuav tawm los ntawm qhov taw tes zoo li hnyav, nws loj hlob mus rau hauv cov kuab tshuaj flake, ua rau cov yeeb yaj kiab wrinkle, ua rau tag nrho cov adhesion ntawm zaj duab xis mus rau substrate, tom thiab tshem tawm cov zaj duab xis.
Raws li qhov sib txawv ntawm kev tshem tawm cov yeeb yaj kiab-tsim tshuaj, lawv tuaj yeem muab faib ua:
① Nws yog tsim nrog cov kuab tshuaj organic xws li ketones, benzenes, thiab cov khoom ua kom txias, nrog rau cov tshuaj tiv thaiv tsis haum tshuaj paraffin, feem ntau hu ua "cov tshuaj dawb", thiab feem ntau yog siv los tshem tawm cov txheej qub xws li roj-raws li, alkyd, thiab nitrolacquer. Hom tshuaj pleev xim zoo nkauj no yog tsim los ntawm cov kuab tshuaj tsis muaj zog, uas muaj teeb meem xws li flammability thiab toxicity, thiab kuj pheej yig.
② Chlorinated hydrocarbon paint remover, commonly known as "water impact paint remover", is prepared with dichloromethane, paraffin and cellulose ether as the main components. It is mainly used to remove old cured coatings such as epoxy asphalt, polyurethane, epoxy phthalamide, amino alkyd resin, etc. High paint removal efficiency, low toxicity, and wide application. The paint removers with dichloromethane as the main solvent can also be divided into neutral paint removers (pH=7 ± 1), alkaline paint removers (pH>7) thiab cov kua qaub xim tshem tawm raws li qhov sib txawv pH.
