Momwe Mungayesere Mayeso a Coating Adhesion-Tepi
Ndi mayeso ofala kwambiri pakuwunika ❖ kuyanika kumamatira ndiye kuyesa kwa matepi ndi peel, komwe kwakhala kukugwiritsidwa ntchito kuyambira m'ma 1930. M'mawonekedwe ake osavuta chidutswa cha tepi yomatira imakanizidwa ndi filimu ya utoto ndi kukana ndi kuchuluka kwa kuchotsa filimu kumawonedwa pamene tepiyo ikuchotsedwa. Popeza kuti filimu yosasunthika yokhala ndi zomatira zoyamikirika nthawi zambiri samachotsedwa konse, kuopsa kwa mayeso nthawi zambiri kumawonjezeka podula mufilimuyo chithunzi X kapena chithunzi chojambulidwa pamtanda, musanagwiritse ntchito ndikuchotsa tepiyo. Kumatira kumayesedwa poyerekeza filimu yomwe yachotsedwa pamlingo wokhazikika. Ngati filimu yosasunthika yapukutidwa bwino ndi tepiyo, kapena ngati imalumikizana ndikudula popanda kugwiritsa ntchito tepi, ndiye kuti zomatirazo zimawerengedwa kuti ndizosauka kapena zosauka kwambiri, kuwunika kolondola kwa makanema oterowo kusakhala mu kuthekera kwa izi. mayeso.
Baibulo lamakono lomwe likugwiritsidwa ntchito kwambiri linasindikizidwa koyamba mu 1974; njira ziwiri zoyesera zimaphimbidwa mulingo uwu. Njira zonse zoyesera zimagwiritsidwa ntchito kutsimikizira ngati kumatira kwa zokutira ku gawo lapansi kuli pamlingo wokwanira; komabe samasiyanitsa pakati pa magulu apamwamba omatira omwe njira zowonjezereka zoyezera zimafunikira.Zolepheretsa zazikulu za kuyesa kwa tepi ndizokhudzika kwake kochepa, kugwiritsidwa ntchito kokha pa zokutira za mphamvu zochepa zomangira zomangira, ndi kusatsimikiza kwa kumamatira ku gawo lapansi. kumene kulephera kumachitika mkati mwa malaya amodzi, monga poyesa zoyambira zokha, kapena mkati kapena pakati pa malaya mu ma multicoat system. Kwa machitidwe a multicoat komwe kulephera kumamatira kumatha kuchitika pakati kapena mkati mwa malaya, kumamatira kwa makina opaka ku gawo lapansi sikudziwika.
Kubwerezabwereza mkati mwa gawo limodzi lowerengera ndi jiniralkuwonetseredwa kwa zokutira pazitsulo panjira zonse ziwiri, ndikupangika kwa mayunitsi amodzi kapena awiri. Mayeso a tepi amasangalala ndi kutchuka kofala ndipo amawoneka ngati "osavuta" komanso otsika mtengo. Ikagwiritsidwa ntchito pazitsulo, imakhala yotsika mtengo, imagwira ntchito polemba ntchito, ndipo chofunika kwambiri, patatha zaka zambiri zogwiritsidwa ntchito, anthu amamasuka nazo.
Pamene tepi yomata yosinthika imagwiritsidwa ntchito pamtunda wokhazikika wokhazikika ndikuchotsedwa, njira yochotseramo ikufotokozedwa ndi "peel phenomenon," monga momwe tawonetsera mkuyu X1.1.
Peeling imayambira pa "toothed" m'mphepete (kumanja) ndikuyenda motsatira zomatira / mawonekedwe kapena mawonekedwe opaka / gawo lapansi, kutengera mphamvu zomangira. Amaganiza kuti ❖ kuyanika kuchotsa kumachitika pamene kumangika mphamvu kwaiye pamodzi yotsirizira mawonekedwe, amene ndi ntchito ya rheological katundu wa akuchirikiza ndi zomatira wosanjikiza zipangizo, ndi wamkulu kuposa chomangira mphamvu pa ❖ kuyanika gawo lapansi mawonekedwe (kapena cohesive mphamvu ya Chophimba) .Kwenikweni, komabe, mphamvuyi imagawidwa pamtunda wosiyana (OA) mumkuyu X1.1, womwe umagwirizana mwachindunji ndi katundu wofotokozedwa, osati wokhazikika pa mfundo (O) mu Fig.
Monga momwe zimakhalira m'malingaliro - ngakhale mphamvu yamphamvu ndi yayikulu kwambiri poyambira onse awiri. Mphamvu yayikulu yopondereza imachokera ku kuyankhidwa kwa tepi yochiritsira kuti itambasulidwe. Chifukwa chake mphamvu zonse zolimba komanso zokakamiza zimakhudzidwa ndi kuyesa kwa tepi yomatira.
Kuyang'anitsitsa kwa mayeso a tepi pokhudzana ndi mtundu wa tepi yomwe yagwiritsidwa ntchito komanso mbali zina za ndondomekoyi zimawulula zisanu ndi ziwiri.ral zinthu, chilichonse kapena kuphatikiza kulikonse komwe kungakhudze kwambiri zotsatira za mayeso monga momwe tafotokozera (6).