Yog lawm, dichloromethane yog siv los ua cov xim tshem tawm, thiab nws tseem yog ib qho ntawm cov kuab tshuaj muaj zog tshaj plaws uas muaj rau stripping kho cov xim thiab txheej zaj duab xis. Dichloromethane (DCM, CAS 75-09-2), tseem hu ua methylene chloride, nkag mus rau cov xim txheej sai sai thiab dissolves cov resin binders uas tuav cov xim ua ke, tso cai rau cov txheej kom muag muag, o, thiab muab pov tseg. Vim tias DCM tsis hloov pauv thiab nthuav tawm kev noj qab haus huv tiag tiag thiab kev txhawj xeeb, nws siv yuav tsum muaj qhov cua kom zoo, cov cuab yeej tiv thaiv, thiab kev paub txog kev tswj hwm kev txwv hauv cov khoom siv.
Dichloromethane yog dab tsi?
Dichloromethane yog chlorinated hydrocarbon nrog cov mis CH2Cl2. Nws yog cov kua ntshiab, tsis muaj xim nrog cov ntxhiab tsw qab, thiab qhov kub ntawm qhov kub ntawm 39.6 degrees, uas ua rau nws muaj zog heev nyob rau hauv chav tsev kub. DCM has a high density, low water solubility, and exceptional dissolving power for resins, oils, waxes, and many polymers. Cov khoom no ua rau nws muaj txiaj ntsig zoo hauv kev lag luam xim strippers, nplaum tshem tawm, degreasers, thiab cov txheej txheem rho tawm, thiab nws kuj yog siv los ua cov txheej txheem hnyav hauv kev tswj cov ntawv thov.
Yuav Ua Li Cas Dichloromethane Tshem Tawm Xim
Xim zaj duab xis muaj cov pigments khi rau hauv ib lub matrix resin. DCM ua haujlwm los ntawm kev nkag mus rau txheej txheej thiab o ntawm cov resin, uas rhuav tshem cov adhesion ntawm cov xim thiab cov substrate thiab nruab nrab ntawm cov xim pigment. Nyob rau hauv feeb ntawm daim ntawv thov, lub txheej softens thiab hlwv, thiab nws yuav ces muab tshem tawm nrog ib tug scraper, txhuam, los yog siab yaug. Vim tias lub tshuab yog lub cev o es tsis yog tshuaj lom neeg tawg ntawm cov resin, DCM ua haujlwm ntawm ntau hom txheej txheej, suav nrog alkyd, epoxy, polyurethane, thiab ntau lub tshuab lacquer thiab enamel, uas yog vim li cas nws thiaj li nyiam nyob rau hauv kev lag luam stripping.
Cov ntawv thov zoo nyob rau hauv xim thiab txheej tshem tawm
Kev lag luam dip tanks: batch stripping ntawm hlau qhov chaw, racks, thiab fixtures qhov twg tuab txheej yuav tsum tau muab tshem tawm zoo.
Rooj tog thiab ntoo refinishing: tshem tawm cov kua roj vanish qub, lacquer, thiab xim txheej los ntawm cov khoom ntoo ua ntej refinishing.
Kev tu thiab rov ua dua: tshem tawm cov txheej txheem ua tsis tiav los ntawm cov khoom siv thiab cov qauv ua ntej kev npaj thiab rov ua dua.
Kev tshem tawm Graffiti: softening pleev xim rau ntawm masonry thiab hlau nto nyob rau hauv lub nroog thiab chaw tu.
Adhesive thiab residue cleanup: tshem cov nplaum kho, mastics, thiab coatings los ntawm cov cuab yeej thiab substrates.
Kev txwv thiab kev xav txog kev sib raug zoo
Tsis yog txhua lub txheej teb sib npaug rau DCM. Qee cov hmoov txheej niaj hnub no, ob-cov khoom siv epoxies, thiab cov yeeb yaj kiab hauv dej muaj zog dua thiab yuav xav tau lub sijhawm nyob ntev dua lossis ntxiv co- cov kuab tshuaj. DCM tseem tuaj yeem tua qee yam yas, roj hmab, thiab cov kuab tshuaj-sensitive substrates, thiab nws yuav soften ntau sealants thiab gaskets. Vim hais tias formulations sib txawv, ib txwm sim lub stripper ntawm ib tug me me, inconspicuous cheeb tsam ua ntej thiab xyuas lub substrate compatibility ua ntej daim ntawv thov tag nrho. DCM evaporates sai, yog li thickened los yog gelled stripper formulations feem ntau yog siv los txuas lub sij hawm sib cuag ntawm qhov chaw ntsug.
Kev nyab xeeb, qhov cua, thiab kev txiav txim siab
DCM raug cais raws li qhov xav tias muaj kab mob carcinogen hauv ntau lub tebchaws, thiab qhov raug mob hnyav rau nws cov vapors tuaj yeem ua rau kiv taub hau, mob taub hau, thiab txo qis kev nco qab, nrog rau cov teeb meem hnyav dua ntawm qhov siab. Ua haujlwm tsuas yog ua kom muaj cua txaus, qhov tso pa tawm hauv zos, thiab siv lub tshuab ua pa pom zoo thaum tsis tuaj yeem tswj tau cov pa. Hnav cov tshuaj lom neeg- hnab looj tes tiv thaiv, tsom iav, thiab khaub ncaws tiv thaiv, thiab zam kev sib cuag ntawm daim tawv nqaij, uas tuaj yeem ua rau muaj tshuaj lom. DCM tsis yooj yim ignited ntawm chav tsev kub, tab sis nws tuaj yeem tsim cov nplaim hluav taws sib xyaw ntawm qhov kub siab thiab tuaj yeem decompose rau corrosive gases ze nplaim taws lossis kub qhov chaw. Ntau lub cheeb tsam txwv tsis pub DCM hauv cov neeg siv khoom xim strippers, yog li cov neeg siv khoom lag luam yuav tsum paub meej txog cov kev cai hauv zos uas siv tau thiab siv cov tshuab kaw uas siv tau. Pov tseg cov khoom siv stripper pov tseg raws li cov kev cai hauv zos.
Cov lus nug nquag
Puas yog dichloromethane tib yam li methylene chloride?
Yog lawm. Dichloromethane thiab methylene chloride yog ob lub npe rau tib lub tebchaw, CH2Cl2, nrog CAS tus lej 75-09-2.
Puas yog DCM tshem tawm txhua hom xim?
DCM tshem tawm cov kuab tshuaj feem ntau-raws li cov xim, lacquers, varnishes, thiab ntau epoxy thiab polyurethane txheej. Qee cov hmoov coatings thiab hla ntau heev -txuas tshuab yog ntau resistant, yog li ib tug me me kuaj thaj yog pom zoo ua ntej daim ntawv thov tag nrho.
Puas yog dichloromethane xim Remover muaj kev nyab xeeb rau kev siv hauv tsev?
DCM yog ib yam khoom phom sij uas muaj kev phom sij loj heev, thiab ntau thaj chaw txwv lossis txwv tsis pub siv rau hauv cov neeg siv khoom xim strippers. Rau kev siv hauv tsev, xaiv cov uas tsis yog -chlorinated, dej-raws li strippers hloov thiab ua raws li cov lus qhia ntawm cov khoom.
DCM siv sijhawm ntev npaum li cas thiaj tshem tau cov xim?
DCM feem ntau softens xim nyob rau hauv 5 mus rau 30 feeb nyob ntawm cov txheej thickness, formulation, thiab kub. Thick, multi- txheej txheej txheej yuav xav tau daim ntawv thov rov qab los yog lub sijhawm nyob ntev dua.
Cov cuab yeej tiv thaiv dab tsi xav tau thaum siv DCM?
Siv tshuaj lom neeg- hnab looj tes tiv thaiv, tsom iav kev nyab xeeb, hnav khaub ncaws tiv thaiv, thiab lub tshuab ua pa pom zoo nrog cov pa roj carbon monoxide thaum lub qhov cua tsis txaus. Ua hauj lwm sab nraum zoov los yog nyob rau hauv lub zos tso pa thaum twg los tau.
Puas yog dichloromethane txwv nyob rau hauv cov xim strippers?
DCM raug txwv lossis txwv tsis pub siv cov tshuaj pleev xim rau hauv ntau lub tebchaws, suav nrog European Union, thaum siv kev lag luam tseem tso cai raws li kev tswj hwm. Tshawb xyuas cov kev cai tshwj xeeb hauv koj cheeb tsam ua ntej yuav khoom lossis siv DCM- raws li cov khoom lag luam.
