Wararka

Samaynta 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 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 dahaarka.
Qalajinta Blooxa midabka dahaarka lehdaahan
Dhismaha adhesion ee daahan guddiga midabka dahaarka ah oo kaliya dhamaystiro tallaabada ugu horeysa ee daahan formation film ee habka daahan ee guddiga midabka dahaarka, iyo habka of noqoshada filim joogto ah adag u baahan tahay in la sii wado, kaas oo dhamaystiri kara habka formation daahan oo dhan daahan. . Habka looga beddelayo "filim qoyan" oo loo beddelo "filim qallalan" waxaa badanaa loo tixraacaa "qallajin" ama "daaweyn". Habka qalajinta iyo daaweynta Tani waa udub dhexaadka habka samaynta filimka daahan. Xirmooyinka leh qaababka iyo qaababka kala duwan waxay leeyihiin habab filim u gaar ah, kuwaas oo lagu go'aamiyo sifooyinka walxaha 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 filimka-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, daahan 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 falcelinta 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 odhan karaa waa hab gaar ah oo ah isku-dhafka polymer, kaas oo si buuxda u raacaya habka falcelinta ee isku-dhafka polymer. Tusaale ahaan, dahaarka alkyd, lakabka epoxy, daboolka polyurethane, daboolka phenolic, iwm. Si kastaba ha ahaatee, inta badan dahaarka casriga ah ma sameeyaan filimaan hal qaab, laakiin waxay ku tiirsan yihiin habab badan si ay ugu dambeyntii u sameeyaan filim, iyo daboolka gariiradda ayaa ah nooca caadiga ah ee filimka. taas oo ku tiirsan habab badan si ay ugu dambeyntii u sameeyaan filimo.