Namuhla, abantu banaka ikhabhoni ephansi kanye nokuvikelwa kwemvelo, ngakho-ke lapho behlobisa, abantu abaningi bazokhetha okunye okuhambisanayo nemvelo.Namuhla sikhuluma ngokuyinhloko ngezingubo ezivikela imvelo ezingangeni manzi.Izembatho ezingangeni manzi zihlukaniswa ngokuyinhloko zibe izinhlobo ezimbili zokumboza: izigqoko ezincibilika emanzini (izingubo ezisekelwe emanzini) kanye nezindwangu ezisekelwe ku-solvent.Ngakho-ke uyini umehluko phakathi kwalezi zingubo ezimbili ezingangeni manzi?
Umehluko phakathi kwezingubo ezisekelwe emanzini kanye ne-solvent-based coatings ungashiwo ngale mibono elandelayo:
A. Umehluko ezinhlelweni zokumboza
1. I-resin ihlukile.I-resin kapende osekelwe emanzini iyancibilika emanzini futhi ingahlakazwa (incibilike) emanzini;
2. I-diluent (solvent) ihlukile.Amapende asekelwe emanzini angahlanjululwa nge-DIWater (amanzi akhishwe yi-deionized) kunoma iyiphi ingxenye, kuyilapho opende abasekelwe ku-solvent bangahlanjululwa kuphela ngezincibilikisi eziphilayo (uphalafini ongenaphunga, uwoyela omhlophe okhanyayo, njll.).
B. Izidingo zokwakhiwa kwe-coating ezehlukene
1. Endaweni yokwakha, indawo yokuqandisa yamanzi ingu-0 °C, ngakho izimbotshana ezisekelwe emanzini azikwazi ukufakwa ngaphansi kuka-5 °C, kuyilapho izimbotshana ezisekelwe ku-solvent zingasetshenziswa ngaphezu kwe -5 °C, kodwa isivinini sokumisa sizohamba kancane. phansi futhi isikhawu phakathi kwamathrekhi sizokwelulwa;
2. Ukuze uthole i-viscosity yokwakha, umphumela wokunciphisa i-viscosity wamanzi umpofu, futhi upende osekelwe emanzini uzoba nzima uma uhlanjululwa futhi uncishiswa ku-viscosity (ukunciphisa i-viscosity kuzonciphisa kakhulu okuqukethwe okuqinile koketshezi olusebenza ngopende, kuthinte amandla okuvala kapende, futhi kwandise inani lamaphasi okwakha), ukulungiswa kwe-viscosity okusekelwe ku-solvent kulula kakhulu, futhi umkhawulo we-viscosity uzophinde uthinte ukukhethwa kwendlela yokwakha;
3. Okomisa nokuphulukisa, upende olusekelwe emanzini lubucayi kakhulu, umswakama uphakeme futhi izinga lokushisa liphansi, alikwazi ukuphulukiswa kahle, futhi isikhathi sokumisa sinwetshiwe, kodwa uma izinga lokushisa lishisa, amanzi asekelwe emanzini. upende nawo udinga ukushiswa ku-gradient, futhi uzongena endaweni enezinga lokushisa eliphezulu ngokushesha.Ngemva kokoma kopende osuselwe emanzini Ukuchichima komhwamuko wangaphakathi wamanzi kungabangela izimbobo noma ngisho namabhamuza amakhulu, ngoba amanzi kuphela asetshenziswa njenge-diluent kupende osuselwe emanzini, futhi akukho ukuvuthwa kwe-volatilization.Ezembozweni ezisekelwe kuncibilikisi, i-diluent yakhiwe ngezincibilikisi eziphilayo ezinamaphoyinti ahlukene abilayo, futhi kukhona ama-gradients amaningi okushintshashintsha.Izenzakalo ezifanayo ngeke zenzeke ngemva kokubaneka (inkathi yokomisa ngemva kokuqedwa kokwakhiwa kuze kufike esikhathini sokumisa ngaphambi kokungena kuhhavini).
C. Umehluko ekuhlobiseni kokugqoka ngemva kokwakhiwa kwefilimu
C-1.Ukuvezwa kwe-gloss okuhlukile
1. Izembatho ezisekelwe ku-solvent zingakwazi ukulawula ukucolisa kwezingulube kanye nezigcwalisi ngokusho kokugaya, futhi akulula ukujiya ngesikhathi sokugcina.Ngokungeza ama-resin ukulawula i-PVC enamathelayo (i-pigment-to-base ratio), izithasiselo (njengama-matting agents) ukuze kuzuzwe izinguquko ekucwebezeleni kwefilimu yokuhlanganisa, Iglosi ingaba matte, matte, semi-matte, futhi high- isicwebezelisi.Isicwebezelisi sikapende wemoto singafinyelela ku-90% noma ngaphezulu;
2. I-gloss expression of water-based paints ayibanzi njengopende owenziwe ngamafutha, futhi ukuvezwa kwe-high-gloss kubi.Lokhu kungenxa yokuthi amanzi kupende osuselwe emanzini asetshenziswa njenge-diluent.Izici zokuguquguquka kwamanzi zenza kube nzima ukuthi amapende asekelwe emanzini
veza isicwebezelisi esiphezulu esingaphezu kwama-85%..
C-2.Ukuvezwa kombala ohlukile
1. Izembatho ezisekelwe ku-solvent zinezinhlobonhlobo ze-pigments kanye nezigcwalisi, ezingaphili noma eziphilayo, ngakho imibala ehlukahlukene ingashintshwa, futhi ukuvezwa kombala kuhle kakhulu;
2. Uhlu olukhethiwe lwe-pigments kanye nokugcwalisa amapende asekelwe emanzini luncane, futhi izingulube eziningi eziphilayo azikwazi ukusetshenziswa.Ngenxa yethoni yombala engaphelele, kunzima ukulungisa imibala ecebile njengamapende asekelwe ku-solvent.
D. Isitoreji Nezokuthutha
Opende abasuselwe emanzini abanawo ama-solvents ephilayo avuthayo, futhi aphephile uma kuqhathaniswa ukuwagcina nokuthuthwa.Uma kwenzeka ukungcola, zingagezwa futhi zihlanjululwe ngamanzi amaningi.Kodwa-ke, amapende asekelwe emanzini anezidingo zokushisa zokugcina nokuthutha.Ubisi nezinye izifo.
E. Ukudlulela Komsebenzi
Izindwangu ezisekelwe ku-solvent ngokuvamile ziyimikhiqizo ye-organic, futhi imikhiqizo ye-organic izoba nochungechunge lwezinkinga ezifana ne-chain scission kanye ne-carbonization ngaphansi kwezimo zokushisa eziphezulu.Njengamanje, izinga lokushisa eliphakeme lokumelana nemikhiqizo ye-organic alidluli ku-400 °C.
Izembatho ezikhethekile ezimelana nezinga lokushisa eliphezulu zisebenzisa ama-resin akhethekile ezinto eziphilayo ezinalayelwe ezisekelwe emanzini zingamelana nezinga lokushisa lezinkulungwane zamadigri.Isibonelo, uchungechunge lwe-ZS olusekelwe emanzini olungamelana nokushisa okuphezulu alugcini nje ngokucabangela izakhiwo zokulwa nokugqwala kanye ne-anti-oxidation zezingubo ezivamile, kodwa futhi ukumelana nokushisa okude isikhathi eside, kuze kufike ku-3000 ℃ izinga lokushisa eliphezulu, okuyi-. akunakwenzeka ngezingubo ezisekelwe ku-solvent.
G. Umehluko ekuvikelekeni nasekuvikelweni kwemvelo
Izindwangu ezisekelwe ku-solvent zinezingozi zokuphepha ezingaba khona zomlilo nokuqhuma ngesikhathi sokukhiqiza, ukuthutha, ukugcinwa, kanye nokusetshenziswa.Ikakhulukazi ezindaweni ezivalekile, maningi amathuba okuthi abangele ukuminza nokuqhuma.Ngasikhathi sinye, ama-solvents e-organic nawo azodala umonakalo othile emzimbeni womuntu.Icala elidume kakhulu yi-toluene ebangela umdlavuza, futhi i-toluene ayisavunyelwe ukusetshenziswa.I-VOC yezingubo ezisekelwe ku-solvent iphezulu, futhi imikhiqizo evamile iphakeme ngisho nangaphezu kuka-400. Amabhizinisi angaphansi kwengcindezi enkulu ekuvikelweni kwemvelo nokuphepha lapho ekhiqiza futhi esebenzisa izimbotshana ezisekelwe ku-solvent.
Izindwangu ezisekelwe emanzini zihambisana nemvelo futhi ziphephile ekukhiqizeni, ekuthuthweni, ekugcinweni nasekusetshenzisweni (ngaphandle kwezingubo ezisekelwe emanzini mbumbulu ezivela kwabanye abakhiqizi abangekho emthethweni).
Isiphetho:
Izembatho ezisekelwe emanzini kanye ne-solvent-based based coatings zinezinzuzo zazo kanye nokubi.Ngenxa yokuthi ucwaningo lwezingubo ezisekelwe emanzini lusakhula, ukusebenza kwezingubo ezisekelwe emanzini akukwazi ukuhlangabezana ngokugcwele nezidingo zokukhiqizwa komphakathi.Ukusetshenziswa kwezingubo ezisekelwe ku-solvent kusadingeka.Isimo sangempela sihlaziywa futhi sahlulelwa, futhi asinakuphikwa ngenxa yokungalungi okuthile kohlobo oluthile lopende.Kukholelwa ukuthi ngokujula kocwaningo lwesayensi mayelana nezingubo ezisekelwe emanzini, ngolunye usuku, ukunamathela kwemvelo nokuphephile kuyosetshenziswa kabanzi kuwo wonke amagumbi omhlaba.
Isikhathi sokuthumela: Jan-13-2022