Wararka

Sameynta filimkalooxa midabka dahaarka lehdahaarka inta badan waxaa ka mid ah laba dhinac: adhesion daahan iyo daahan qalajin.
Adhesion of A daahan guddiga midabka dahaarka ah
Tallaabada ugu horreysa ee adhesion ee u dhaxaysa substrate strip birta iyo daahan waa qoynta ee daahan guddiga midabka dahaarka on dusha substrate.Qooynta dahaarka ayaa bedeli kara hawada iyo biyaha markii hore lagu dhajiyay dusha sare ee birta.Isla mar ahaantaana, isbeddelka dareeraha ee dusha sare ee substrate wuxuu keenaa kala diri ama barar.Haddii cabbirada milanka ee resin-samaynta filimka ee daahan guddiga midabka dahaarka ah iyo dusha sare ee substrate si habboon loo doortay, waxay samayn doontaa lakab aan la taaban karin oo u dhexeeya dusha sare ee guddiga midabka dahaarka ah iyo filimka daahan, Tani waxay muhiim u tahay adhesion wanaagsan ee daahan.
Qalajinta Blooxa midabka dahaarka lehdaahan
Dhismaha adhesion ee daahan guddiga midabka dahaarka kaliya dhameystiraya tallaabada ugu horeysa ee daahan formation film ee habka daahan ee guddiga midabka dahaarka ah, iyo habka loo noqdo filim joogto ah oo adag u baahan yahay in la sii wado, kaas oo dhamaystiri kara habka formation daahan oo dhan.Habka looga beddelayo "filim qoyan" loona beddelo "filim qallalan" waxaa badanaa loo tixraacaa "qallajin" ama "daaweyn".Habka qalajinta iyo daaweynta Tani waa udub dhexaadka habka samaynta filimka daahan.Xirmooyinka leh qaabab kala duwan iyo qaabab kala duwan ayaa leh habab filim u gaar ah, kuwaas oo lagu go'aamiyo sifooyinka walxaha samaynta filimada ee loo isticmaalo daaha.Caadi ahaan, waxaan u qaybineynaa habka sameynta filimka ee daahanka laba qaybood:
(1) Aan isbedel lahayn.Guud ahaan, waxa loola jeedaa habka film-samaynta jireed, kaas oo inta badan ku tiirsan isbedbeddelka ee dareerayaasha ama warbaahinta kale firdhiso ee filimka daahan, si tartiib tartiib ah kordhinta viscosity ee filimka daahan iyo sameynta filim daahan adag.Tusaale ahaan, dahaarka akril, dahaarka caag koloriin leh, daahan ethylene, iwm.
(2) Isbadal.Guud ahaan, waxa ay tilmaamaysaa dhacdooyinka fal-celin kiimikaad ah inta lagu jiro habka samaynta filimku, dahaarkana waxa uu inta badan ku tiirsan yahay fal-celinta kiimikada si loo sameeyo filim.Habka sameynta filimkan waxaa loola jeedaa polymerization ee walxaha samaynta filimada ee daaha, loo yaqaan polymers, ka dib codsiga.Waxaa la dhihi karaa waa hab gaar ah oo ah isku-dhafka polymer, kaas oo si buuxda u raacaya habka falcelinta ee isku-dhafka polymer.Tusaale ahaan, daboolka alkyd, daboolka epoxy, daboolka poliurethane, daboolka phenolic, iwm, Si kastaba ha ahaatee, inta badan muraayadaha casriga ah ma sameeyaan filimo hal qaab ah, laakiin waxay ku tiirsan yihiin habab badan si ay ugu dambeyntii u sameeyaan filimo, iyo daboolka daboolka ayaa ah nooca caadiga ah ee filimka kaas oo ku tiirsan habab badan si uu ugu dambeyntii u sameeyo filim.