Umhluzi wepeyinti Umhluzi wepeyinti omkhulu/umsusi wepeyinti

 Umhluzi wepeyinti Umhluzi wepeyinti omkhulu/umsusi wepeyinti

Iimbonakalo:

l Isisusi-peyinti esinobuhlobo nokusingqongileyo

l Ayinamhlwa, sebenzisa ukhuseleko kwaye isebenze lula

l Ayinaso i-asidi, i-benzene kunye nezinye izinto eziyingozi

Ingasetyenziswa kwakhona ngokucoca ifilimu yepeyinti kunye ne-slag yepeyinti kwisisombululo

l Ngaba ungayisusa ngokukhawuleza i-phenolic resin, i-acrylic, i-epoxy, ipeyinti yokugqiba i-polyurethane kunye nepeyinti ephambili

 

Inkqubo yesicelo:

Inkangeleko: Ulwelo olucacileyo olungenambala ukuya kolumdaka olukhanyayo

l Indlela yonyango: Ukuntywila

Ixesha lonyango: 1-15min

l Ubushushu bonyango: 15-35℃

l Emva konyango: Hlamba ifilimu yepeyinti yentsalela ngokusebenzisa amanzi aphantsi koxinzelelo oluphezulu

Isaziso:

1. Amanyathelo okuzikhusela

(1) Akuvumelekanga ukuyichukumisa ngqo ngaphandle kokhuseleko;

(2) Nxiba iiglavu zokhuseleko kunye neeglasi ngaphambi kokuzisebenzisa

(3) Gcina kude nobushushu, umlilo kwaye ugcine kwindawo enomthunzi, enomoya opholileyo

2. Amanyathelo oncedo lokuqala

1. Yihlambe ngamanzi amaninzi ngoko nangoko, ukuba idibene nolusu namehlo. Emva koko cela ingcebiso kagqirha ngokukhawuleza.

2. Sela malunga ne-10% yesodium carbonate emanzini ngoko nangoko, ukuba kunokwenzeka uginye isixhobo sokususa ipeyinti. Emva koko cela ingcebiso kagqirha ngokukhawuleza.

 

Isicelo:

l Intsimbi yeCarbon

Iphepha lesinyithi

l i-aluminium alloy

l ingxubevange ye-magnesium

l Ubhedu, iglasi, umthi kunye neplastiki njl.

 

Iphakheji, indawo yokugcina kunye nokuthuthwa:

Ifumaneka kwi-200 kg/ ibhereli okanye kwi-25 kg/ ibhereli

Ixesha lokugcina: ~iinyanga ezili-12 kwizikhongozeli ezivaliweyo, kwindawo enomthunzi neyomileyo

Ukususa ipeyinti kunye ne-plasticizer

Ukususa ipeyinti kunye ne-plasticizer

intshayelelo

Okwangoku, uphuhliso lwe-paint stripper eTshayina lukhawuleza kakhulu, kodwa kusekho iingxaki ezithile, ezinje ngetyhefu ephezulu, isiphumo sokususwa kwepeyinti esinganelisiyo kunye nongcoliseko olukhulu. Umgangatho ophezulu, umxholo ophezulu wetekhnoloji kunye neemveliso ezinexabiso eliphezulu zimbalwa. Kwinkqubo yokulungiselela i-paint stripper, i-paraffin wax idla ngokufakwa, nangona inokuthintela i-solvent ukuba ingaguquguquki ngokukhawuleza, kodwa emva kokususwa kwepeyinti, i-paraffin wax ihlala ihlala kumphezulu wento eza kupeyintwa, ngoko ke kuyimfuneko ukususa ngokupheleleyo i-paraffin wax, ngenxa yeemeko ezahlukeneyo zomphezulu oza kupeyintwa, okwenza kube nzima kakhulu ukususa i-paraffin wax, nto leyo ebangela ingxaki enkulu kwi-coating elandelayo. Ukongeza, ngokuhambela phambili kwetekhnoloji kunye nophuhliso loluntu, abantu baya beqonda ngakumbi ngokhuseleko lokusingqongileyo kwaye baneemfuno eziphezulu neziphezulu ze-paint strippers. Kangangeminyaka emininzi, ishishini lepeyinti belizama ukunciphisa ukusetyenziswa kwe-solvents. Nangona kunjalo, i-solvents ibaluleke kakhulu ekupeyinteni i-strippers, kwaye ke ngoko ukukhethwa kwe-solvents kubaluleke kakhulu. Inqaku 612 leGerman Technical Specification (TRGS) lisoloko lithintela ukusetyenziswa kwezicucu zepeyinti ze-methylene chloride ukuze kuncitshiswe iingozi zomsebenzi. Okubalulekileyo kukusetyenziswa rhoqo kwezicucu zepeyinti ze-methylene chloride zemveli ngabahombisi ngaphandle kokujonga ukhuseleko lwendawo yokusebenza. Zombini iinkqubo eziqinileyo nezisekelwe emanzini ziyindlela yokunciphisa umxholo we-solvent kunye nokwenza imveliso ekhuselekileyo ukuyisebenzisa. Ke ngoko, izicucu zepeyinti ezisekelwe emanzini ezinobuhlobo nokusingqongileyo kwaye zisebenza kakuhle ziya kuba yindlela eya phambili yezicucu zepeyinti. Izicucu zepeyinti ezikumgangatho ophezulu nezisemgangathweni ophezulu zithembisa kakhulu.

Vala ukuhlela esi siqendu iintlobo zomhluzi wepeyinti

1) Umhluzi wepeyinti ye-alkaline

Isicoci sepeyinti ye-alkaline ngokubanzi siquka izinto ze-alkaline (i-sodium hydroxide esetyenziswa rhoqo, i-soda ash, iglasi yamanzi, njl.njl.), izinto ezisetyenziswa xa kusenziwa ...

2) Umhluzi wepeyinti ye-asidi.

I-acid paint stripper yi-paint stripper eyenziwe zii-asidi ezinamandla ezifana ne-sulfuric acid egxininisiweyo, i-hydrochloric acid, i-phosphoric acid kunye ne-nitric acid. Ngenxa yokuba i-hydrochloric acid egxilileyo kunye ne-nitric acid ziyaguquguquka lula kwaye zivelise i-acid mist, kwaye zinefuthe lokubola kwi-substrate yesinyithi, kwaye i-phosphoric acid egxilileyo ithatha ixesha elide ukubola ipeyinti kwaye inefuthe lokubola kwi-substrate, ngoko ke, ezi asidi zintathu zingasentla azisetyenziswa rhoqo ukubola ipeyinti. I-concentrated sulfuric acid kunye ne-aluminium, isinyithi kunye nezinye iintsimbi ze-passivation reaction, ngoko ke ukubola kwesinyithi kuncinci kakhulu, kwaye kwangaxeshanye kunokuphelelwa ngamandla kwamanzi, i-carbonization kunye ne-sulfonation yezinto eziphilayo kwaye kwenze ukuba ichitheke emanzini, ngoko ke i-concentrated sulfuric acid idla ngokusetyenziswa kwi-acid paint stripper.

3) Umhluzi wepeyinti oqhelekileyo

Isixhobo sokucoca ipeyinti esiqhelekileyo senziwe ngomxube we-organic solvent eqhelekileyo kunye neparafini, njengesixhobo sokucoca ipeyinti se-T-1, T-2, T-3; isixhobo sokucoca ipeyinti se-T-1 senziwe nge-ethyl acetate, i-acetone, i-ethanol, i-benzene, iparafini; i-T-2 yenziwe nge-ethyl acetate, i-acetone, i-methanol, i-benzene kunye nezinye izinyibilikisi kunye neparafini; i-T-3 yenziwe nge-methylene chloride, i-plexiglass, i-plexi-glass kunye nezinye izinyibilikisi. I-Ethanol, i-paraffin wax, njl. zixutyiwe, zinobuthi obuphantsi, kwaye zinomphumo omhle wokucoca ipeyinti. Zinefuthe lokucoca ipeyinti kwipeyinti ye-alkyd, ipeyinti ye-nitro, ipeyinti ye-acrylic kunye nepeyinti ye-perchloroethylene. Nangona kunjalo, i-organic solvent kolu hlobo lwesixhobo sokucoca ipeyinti iyatshintshatshintsha, iyatsha kwaye inetyhefu, ngoko ke kufuneka isetyenziswe kwindawo enomoya ococekileyo.

4) Umhluzi wepeyinti we-chlorine hydrocarbon solvent

Isixhobo sokucoca ipeyinti esinyibilikisa i-chlorine hydrocarbon solvent sisombulula ingxaki yokucocwa kwepeyinti kwi-epoxy kunye ne-polyurethane coating, kulula ukuyisebenzisa, sisebenza kakuhle kwaye asibolisi kangako kwiintsimbi. Iquka ikakhulu izinyibilikisi (izihluzi zepeyinti zemveli zisebenzisa i-methylene chloride njenge-organic solvent, ngelixa izihluzi zepeyinti zanamhlanje zihlala zisebenzisa izinyibilikisi ezinamaqondo aphezulu okubila, ezifana ne-dimethylaniline, i-dimethyl sulfoxide, i-propylene carbonate kunye ne-N-methyl pyrrolidone, zidityaniswe ne-alcohols kunye nezinyibilikisi ezinuka kamnandi, okanye zidityaniswe neenkqubo ze-hydrophilic alkaline okanye ze-acidic), izinyibilikisi ezidibeneyo (ezifana ne-methanol, i-ethanol kunye ne-isopropyl alcohol, njl.njl.) Izinyibilikisi (ezifana ne-phenol, i-formic acid okanye i-ethanolamine, njl.njl.), izinyibilikisi (ezifana ne-polyvinyl alcohol, i-methyl cellulose, i-ethyl cellulose kunye ne-fumed silica, njl.njl.), izithinteli eziguquguqukayo (ezifana ne-paraffin wax, i-ping ping, njl.njl.), izithinteli zokubola (ezifana ne-OP-10, i-OP-7 kunye ne-sodium alkyl benzene sulfonate, njl.njl.), izithinteli zokubola, ii-penetration agents, ii-wetting agents kunye nee-thixotropic agents.

5) Umhluzi wepeyinti osekelwe emanzini

ETshayina, abaphandi baphumelele ekuphuhliseni i-paint stripper esebenzisa amanzi besebenzisa i-benzyl alcohol endaweni ye-dichloromethane njenge-solvent ephambili. Ngaphandle kwe-benzyl alcohol, ikwaquka i-agent yokutyeba, i-volatile inhibitor, i-activator kunye ne-surfactant. Ulwakhiwo lwayo olusisiseko (umlinganiselo wevolumu): i-20%-40% ye-solvent component kunye ne-40%-60% ye-acidic water-based component ene-surfactant. Xa ithelekiswa ne-dichloromethane paint stripper yendabuko, ayinatyhefu ingako kwaye isantya esifanayo sokususa ipeyinti. Ingasusa ipeyinti ye-epoxy, i-epoxy zinc yellow primer, ingakumbi kwi-aircraft skinning paint inefuthe elihle lokukrazula ipeyinti.

Bhinqa ukuhlela esi siqendu izinto eziqhelekileyo

1) Isinyibilikisi esiyintloko

I-solvent ephambili inokunyibilikisa ifilimu yepeyinti ngokungena kwemolekyuli kunye nokudumba, okunokutshabalalisa ukunamathela kwefilimu yepeyinti kwi-substrate kunye nesakhiwo sendawo sefilimu yepeyinti, ngoko ke i-benzene, i-hydrocarbon, i-ketone kunye ne-ether zihlala zisetyenziswa njengezona zinyibilikisi ziphambili, kwaye i-hydrocarbon yeyona ilungileyo. Izinyibilikisi eziphambili yi-benzene, ii-hydrocarbons, ii-ketones kunye nee-ethers, kwaye ii-hydrocarbons zezona zilungileyo. I-solvent ye-solvent engenatyhefu incinci engena-methylene chloride ikakhulu iqulethe i-ketone (pyrrolidone), i-ester (methyl benzoate) kunye ne-alcohol ether (ethylene glycol monobutyl ether), njl. I-ethylene glycol ether ilungile kwi-polymer resin. I-ethylene glycol ether inonyibiliko oluqinileyo kwi-polymer resin, iyakwazi ukungena kakuhle, inqanaba eliphezulu lokubila, ixabiso eliphantsi, kwaye ikwayi-surfactant elungileyo, ngoko ke iyasebenza kuphando lokuyisebenzisa njenge-solvent ephambili ukulungiselela i-paint stripper (okanye i-cleaner agent) enefuthe elihle kunye nemisebenzi emininzi.

Imolekyuli yebenzaldehyde incinci, kwaye ukungena kwayo kwikhonkco leemacromolecules kunamandla, kwaye ukunyibilika kwayo kwizinto eziphilayo ezikwi-polar nako kunamandla kakhulu, nto leyo eya kwenza iimacromolecules zinyuke ngomthamo kwaye zivelise uxinzelelo. I-paint stripper enobungozi obuphantsi kunye ne-volatility ephantsi eyenziwe nge-benzaldehyde njenge-solvent inokususa ngempumelelo i-epoxy powder coating kumphezulu we-metal substrate kubushushu begumbi, kwaye ikwafanelekile ekususeni ipeyinti yesikhumba senqwelo-moya. Ukusebenza kwale paint stripper kufana noko kwe-chemical paint strippers zemveli (uhlobo lwe-methylene chloride kunye nohlobo lwe-alkali eshushu), kodwa ayidli kakhulu kwi-metal substrates.

I-Limonene yinto elungileyo kwizixhobo zokususa ipeyinti ngokwembono ehlaziyekayo. Yi-hydrocarbon solvent ethathwe kwi-orenji peel, i-tangerine peel kunye ne-citron peel. Yi-solvent egqwesileyo yegrisi, i-wax kunye ne-resin. Inendawo ephezulu yokubila kunye nendawo yokutsha kwaye ikhuselekile ukuyisebenzisa. Ii-Ester solvents zingasetyenziswa njengezinto eziluhlaza kwi-paint stripper. Ii-Ester solvents zibonakaliswa yityhefu ephantsi, ivumba elimnandi kwaye azinyibiliki emanzini, kwaye zisetyenziswa kakhulu njenge-solvents zezinto eziphilayo ezinamafutha. I-Methyl benzoate imele ii-ester solvents, kwaye uninzi lwabaphengululi lunethemba lokuyisebenzisa kwi-paint stripper.

2) I-Co-solvent

I-co-solvent inokunyusa ukunyibilika kwe-methyl cellulose, iphucule i-viscosity kunye nozinzo lwemveliso, kwaye isebenzisane nee-molecules eziphambili ze-solvent ukuze zingene kwifilimu yepeyinti, zinciphise ukunamathelana phakathi kwefilimu yepeyinti kunye ne-substrate, ukuze kukhawuleziswe izinga lokukrazula ipeyinti. Inganciphisa nomthamo we-solvent ephambili kwaye inciphise iindleko. Ii-alcohols, ii-ether kunye nee-esters zihlala zisetyenziswa njenge-co-solvents.

3) Umkhuthazi

I-Promoter linani lee-nucleophilic solvents, ikakhulu ii-organic acids, ii-phenols kunye nee-amines, kuquka i-formic acid, i-acetic acid kunye ne-phenol. Isebenza ngokutshabalalisa imixokelelwane ye-macromolecular kunye nokukhawulezisa ukungena kunye nokudumba kwengubo. I-organic acid iqulethe iqela elifanayo elisebenzayo njengokwakhiwa kwefilimu yepeyinti - OH, inokunxibelelana nenkqubo yokudibanisa ioksijini, i-nitrogen kunye nezinye ii-athomu ze-polar, iphakamisa inkqubo yenxalenye yeendawo zokudibanisa ezibonakalayo, ngaloo ndlela inyusa i-paint stripper kwisantya sokusasazwa kwengubo yendalo, iphucule ukudumba kwefilimu yepeyinti kunye nokukwazi ukushwabana. Kwangaxeshanye, ii-organic acids zinokuvuselela i-hydrolysis ye-ester bond, i-ether bond yepolymer kwaye yenze ukuba iphule i-bond, okubangela ukulahleka kokuqina kunye ne-brittle substrates emva kokususa ipeyinti.

Amanzi anyibilikisiweyo sisinyibilikisi esingaguqukiyo se-dielectric esiphezulu (ε=80120 kwi-20 ℃). Xa umphezulu oza kuhlutywa ungowe-polar, njenge-polyurethane, isinyibilikisi esingaguqukiyo se-dielectric esiphezulu sinefuthe elihle ekwahlukaniseni umphezulu we-electrostatic, ukuze ezinye izinyibilikisi zingene kwii-pores eziphakathi kwengubo kunye ne-substrate.

Iperoksayidi yehydrogen iyabola kwiindawo ezininzi zesinyithi, ivelise ioksijini, ihydrogen kunye nohlobo lweoksijini oluyi-athomu. Ioksijini ibangela ukuba umaleko okhuselayo othambileyo uqengqeleke, uvumela i-paint stripper entsha ukuba ingene phakathi kwesinyithi kunye ne-coating, ngaloo ndlela ikhawulezisa inkqubo ye-stripping. Ii-asidi nazo ziyinxalenye ephambili kwi-paint stripper formulations, kwaye umsebenzi wazo kukugcina i-pH ye-paint stripper kwi-210-510 ukuze isabelane namaqela e-amine akhululekileyo kwii-coating ezifana ne-polyurethane. I-asidi esetyenziswayo ingaba yi-solid acid enyibilikayo, i-liquid acid, i-organic acid okanye i-inorganic acid. Njengoko i-inorganic acid inokubangela ukubola kwesinyithi, ngoko ke kungcono ukusebenzisa ifomyula eqhelekileyo ye-RCOOH, ubunzima be-molecular bungaphantsi kwe-1,000 ye-solid organic acids, njenge-formic acid, i-acetic acid, i-propionic acid, i-butyric acid, i-valeric acid, i-hydroxyacetic acid, i-hydroxybutyric acid, i-lactic acid, i-citric acid kunye nezinye ii-hydroxy acids kunye nemixube yazo.

4) Izinto eziqinisayo

Ukuba i-paint stripper isetyenziselwa izinto ezinkulu zesakhiwo ezifuna ukunamathela kumphezulu ukuze zisebenze, kuyimfuneko ukongeza izinto zokutyebisa ezifana neepolymers ezinyibilikayo emanzini ezifana ne-cellulose, i-polyethylene glycol, njl.njl., okanye iityuwa ezingaphiliyo ezifana ne-sodium chloride, i-potassium chloride, i-sodium sulfate, kunye ne-magnesium chloride. Kufuneka kuqatshelwe ukuba izinto zokutyebisa iityuwa ezingaphiliyo ziya kwandisa i-viscosity yazo, ngaphaya kolu luhlu, i-viscosity iyancitshiswa endaweni yoko, kwaye ukukhetha okungafanelekanga kunokuba nefuthe nakwezinye izinto.

I-Polyvinyl alcohol yi-polymer enyibilikayo emanzini, enokunyibilika kakuhle kwamanzi, ukwakheka kwefilimu, ukunamathela kunye ne-emulsification, kodwa zimbalwa izinto eziphilayo ezinokuyinyibilikisa, izinto ze-polyol ezifana ne-glycerol, i-ethylene glycol kunye ne-polyethylene glycol ephantsi kobunzima be-molecular, i-amide, ityuwa ye-triethanolamine, i-dimethyl sulfoxide, njl.njl., kwizinyibilikisi ze-organic ezingentla, kufuneka kunyibilikiswe inani elincinci le-polyvinyl alcohol. Isisombululo samanzi se-Polyvinyl alcohol kunye nomxube we-benzyl alcohol kunye ne-formic acid esingahambelani kakuhle, kulula ukuyifaka, kwaye ngaxeshanye ne-methyl cellulose, ukunyibilika kwe-hydroxyethyl cellulose ye-poor, kodwa kunye ne-carboxy methyl cellulose kubhetele.

I-Polyacrylamide yi-polymer enyibilikayo emanzini ethe ngqo, yona kunye nezinto eziphuma kuyo zingasetyenziswa njenge-flocculants, i-thickeners, i-enhancers yephepha kunye ne-retarders, njl. Njengoko i-polyacrylamide molecular chain ineqela le-amide, ibonakaliswa yi-hydrophilicity ephezulu, kodwa ayinyibiliki kwizisombululo ezininzi ze-organic, ezifana ne-methanol, i-ethanol, i-acetone, i-ether, i-aliphatic hydrocarbons kunye ne-aromatic hydrocarbons. Isisombululo samanzi se-Methyl cellulose kwi-benzyl alcohol uhlobo lwe-asidi sizinzile ngakumbi, kwaye iintlobo ngeentlobo zezinto ezinyibilikayo emanzini zinokuxutywa okuhle. Ubungakanani be-viscosity buxhomekeke kwiimfuno zokwakha, kodwa isiphumo sokutyeba asihambelani ngokuthe ngqo nobungakanani, ngokwanda kobungakanani obongeziweyo, isisombululo samanzi sinciphisa kancinci ubushushu be-gelation. Uhlobo lweBenzaldehyde alunakwandiswa ngokongeza i-methyl cellulose ukuze kufezekiswe isiphumo esibalulekileyo se-viscosity.

5) Isithinteli sokuGqwala

Ukuthintela ukugqwala kwesiseko (ingakumbi i-magnesium kunye ne-aluminium), kufuneka kongezwe isixa esithile se-corrosion inhibitor. Ukugqwala yingxaki engenakuyityeshelwa kwinkqubo yokwenziwa, kwaye izinto eziphathwe nge-paint stripper kufuneka zihlanjwe kwaye zomiswe ngamanzi okanye zihlanjwe nge-rosin kunye ne-petroli ngexesha elifanelekileyo ukuqinisekisa ukuba isinyithi kunye nezinye izinto azigqwali.

6) Izithinteli eziguquguqukayo

Ngokubanzi, izinto ezinomngxuma omhle kulula ukuzenza zibe yi-volatilize, ngoko ke ukuze kuthintelwe i-volatilization yee-molecule eziphambili ze-solvent, kufuneka kongezwe inani elithile le-volatilization inhibitor kwi-paint stripper ukunciphisa i-volatilization yee-molecule ze-solvent kwinkqubo yokuvelisa, ukuthutha, ukugcina kunye nokusetyenziswa. Xa i-paint stripper ene-paraffin wax isetyenziswa kumphezulu wepeyinti, kuya kwenziwa umaleko omncinci we-paraffin wax kumphezulu, ukuze ii-solvent molecules eziphambili zibe nexesha elaneleyo lokuhlala kwaye zingene kwifilimu yepeyinti ukuze zisuswe, ngaloo ndlela ziphucule isiphumo sokususa ipeyinti. I-paraffin wax eqinileyo yodwa iya kubangela ukusasazeka okubi, kwaye inani elincinci le-paraffin wax liya kuhlala kumphezulu emva kokususwa kwepeyinti, nto leyo eya kuchaphazela ukutshiza kwakhona. Ukuba kuyimfuneko, yongeza i-emulsifier ukunciphisa uxinzelelo lomphezulu ukuze i-paraffin wax kunye ne-paraffin wax engamanzi zisasazeke kakuhle kwaye uzinzo lokugcina kwayo luphuculwe.

7) I-Surfactant

Ukongezwa kwee-surfactants, ezifana nee-amphoteric surfactants (umz., imidazoline) okanye i-ethoxynonylphenol, kunokunceda ukuphucula uzinzo lokugcina ipeyinti kwaye kube lula ukuhlambulula ipeyinti ngamanzi. Kwangaxeshanye, ukusetyenziswa kwee-molecules ze-surfactant ezineempawu ezimbini ezichaseneyo ze-lipophilic kunye ne-hydrophilic ze-surfactant, kunokuchaphazela isiphumo sokunyibilika; ukusetyenziswa kwe-surfactant colloidal group effect, ukuze ukunyibilika kwezinto ezininzi kwi-solvent kwande kakhulu. Ii-surfactants ezisetyenziswa rhoqo yi-propylene glycol, i-sodium polymethacrylate okanye i-sodium xylenesulfonate.

Ukudilika