UVavanya Njani Uvavanyo lokuncamathela-Tape
Ukuza kuthi ga ngoku olona vavanyo luxhaphakileyo lokuvavanya ukunamathela kokugquma luvavanyo lweteyiphu ne-peel, olwalusetyenziswa ukususela ngeminyaka yee-1930. Kwinguqulelo yayo elula iqhekeza letape yokuncamathelisa icinezelwe ngokuchasene nefilimu yepeyinti kunye nokuchasana kunye neqondo lokususwa kwefilimu ebonwayo xa itheyiphu itsalwa. Kuba ifilimu engaguqukiyo encamathelayo encomekayo ihlala ingasuswa kwaphela, ubukhali bovavanyo budla ngokuphuculwa ngokusika kwifilim umzobo X okanye ipatheni eqanduselweyo, phambi kokufaka kunye nokususa itheyiphu. Ukuncamathela ke kulinganiswe ngokuthelekisa ifilim esusiweyo kwisikali esimiselweyo sokukala. Ukuba ifilimu engaguqukiyo ihlanjululwe ngokucocekileyo ngeteyiphu, okanye ukuba ibophelela ngokusika kuyo ngaphandle kokufaka iteyiphu, ke ukuncamathela kulinganiswa nje ngokuba kubi okanye kubi kakhulu, uphononongo oluchanekileyo lwezo filimu zingekho ngaphakathi kokukwazi oku. uvavanyo.
Inguqulelo yangoku esetyenziswa ngokubanzi yaqala ukupapashwa ngowe-1974; iindlela ezimbini zovavanyo zigutyungelwe kulo mgangatho. Zombini iindlela zokuvavanya zisetyenziselwa ukufumanisa ukuba ukuncamatheliswa kwengubo kwi-substrate kukwinqanaba elaneleyo; nangona kunjalo abahluli phakathi kwamanqanaba aphezulu okubambelela apho kufuneka khona iindlela eziphucukileyo zokulinganisa.Imida enkulu yovavanyo lweteyiphu lubuntununtunu obuphantsi, ukusetyenziswa kuphela kwiingubo zamandla aphantsi kakhulu, kunye nokungamiselwa kokubambelela kwi-substrate. apho ukusilela kwenzeka ngaphakathi kwedyasi enye, njengaxa kuvavanywa iiprimers zodwa, okanye ngaphakathi okanye phakathi kweedyasi kwiinkqubo zemulticoat. Kwiinkqubo ze-multicoat apho ukungaphumeleli kokubambelela kunokwenzeka phakathi okanye ngaphakathi kweengubo, ukunamathela kwenkqubo yokugqoka kwi-substrate ayinqunywanga.
Ukuphindaphinda kwiyunithi enye yokulinganisa yimfuzaralkujongwe ngokucokisekileyo ukwambathisa kwisinyithi kuzo zombini iindlela, kunye nokuphindaphindeka kweyunithi enye ukuya kwezimbini. Uvavanyo lweteyiphu lunandipha ukuthandwa ngokubanzi kwaye lubonwa "njengelula" kunye nexabiso eliphantsi. Ifakwe kwisinyithi, inoqoqosho ukwenza, iboleka kwisicelo sendawo yomsebenzi, kwaye okona kubaluleke kakhulu, emva kwamashumi eminyaka yokusetyenziswa, abantu baziva bekhululekile kuyo.
Xa i-tape yokubambelela eguquguqukayo isetyenziswe kwi-coated rigid substrate surface kwaye emva koko isuswe, inkqubo yokususa ichazwe ngokwemiqathango "ye-peel phenomenon," njengoko kuboniswe kwi-Fig. X1.1.
Ukuxobulwa kuqala kungqameko oluhamba phambili "olunamazinyo" (ngasekunene) kwaye luqhubela phambili ecaleni kokuncamathelisa okuncamathelisayo/ujongano okanye ujongano lokwaleka/i-substrate, ngokuxhomekeke kukuqina kwebhondi. Kucingelwa ukuba ukususwa kokugquma kwenzeka xa amandla okuqina eveliswa ecaleni kojongano lwamva, olungumsebenzi weempawu zerheological ze-backing kunye ne-adhesive layer material, inkulu kunokomelela kwebhondi kwi-coating-substrate interface (okanye amandla ahlangeneyo i-coating) .Ngokwenyani, nangona kunjalo, lo mandla usasazwa kumgama ocacileyo (OA) kwi-Fig. X1.1, ehambelana ngokuthe ngqo kwiipropati ezichazwe, ezingagxininisi kwinqanaba (O) kwi-Fig.
Njengakwimeko yethiyori-nangona amandla okuqina makhulu kwimvelaphi yazo zombini. Amandla oxinzelelo olubalulekileyo avela kwimpendulo ye-tape yokuxhasa izinto ukuba yolulwe. Ngaloo ndlela zombini i-tensile kunye ne-compressive force ibandakanyeka kuvavanyo lwe-adhesion tape.
Uphononongo olusondeleyo lovavanyo lweteyiphu ngokumalunga nobume beteyiphu esetyenzisiweyo kunye nemiba ethile yenkqubo ngokwayo ityhila isixhenxe.ral izinto, nganye okanye nayiphi na indibaniselwano enokuthi ichaphazele kakhulu iziphumo zovavanyo njengoko kuxoxiwe (6).