Yadda Ake Auna Gwajin Manne-Tape Mai Rufa
Ya zuwa yanzu mafi yawan gwajin gwaji don kimantawa shafi mannewa shine gwajin tef-da-bawo, wanda aka yi amfani da shi tun shekarun 1930. A cikin mafi sauƙin sigar sa an danna wani tef ɗin manne akan fim ɗin fenti da juriya da matakin cire fim lokacin da aka cire tef ɗin. Tunda ba a cire ingantaccen fim ɗin tare da mannewa da yawa kwata-kwata, tsananin ƙarfin gwajin yawanci ana haɓakawa ta hanyar yankan siffa X ko ƙirar giciye a cikin fim ɗin, kafin a shafa da cire tef ɗin. Ana ƙididdige mannewa daga nan ta hanyar kwatanta fim ɗin da aka cire tare da ƙaƙƙarfan ma'aunin ƙima. Idan fim ɗin da ba shi da kyau ya goge shi da tsafta ta hanyar tef, ko kuma idan ya yanke shi kawai ta hanyar yanke shi ba tare da shafa tef ba, to ana ƙididdige mannewa kawai a matsayin matalauci ko kuma maras kyau sosai, ƙimar ƙimar irin waɗannan fina-finai ba ta cikin iyawar wannan. gwadawa.
An fara buga sigar da ake amfani da ita sosai a cikin 1974; Hanyoyin gwaji guda biyu an rufe su a cikin wannan ma'auni. Ana amfani da hanyoyi guda biyu na gwaji don tabbatar da ko mannewar rufin da aka yi da wani abu yana a matakin da ya dace; duk da haka ba su bambanta tsakanin matakan maɗaukaki mafi girma wanda ake buƙatar ƙarin hanyoyin ma'auni mai mahimmanci.Major iyaka na gwajin tef ɗin shine ƙananan hankali, aikace-aikacen kawai ga suturar ƙananan ƙarfin haɗin gwiwa, da rashin ƙaddarar mannewa ga substrate. inda gazawar ke faruwa a cikin riga ɗaya, kamar lokacin gwajin alƙawura kaɗai, ko a ciki ko tsakanin riguna a tsarin multicoat. Don tsarin multicoat inda gazawar mannewa zai iya faruwa a tsakanin ko a tsakanin riguna, ba a ƙayyade mannewar tsarin sutura zuwa ƙasa ba.
Maimaituwa a cikin rukunin kima guda ɗaya shine nau'in halittarally lura da coatings a kan karafa ga biyu hanyoyin, tare da reproducibility na daya zuwa biyu raka'a. Gwajin tef ɗin yana jin daɗin yaɗuwar shahara kuma ana kallonsa a matsayin "mai sauƙi" haka kuma maras tsada. Aiwatar da karafa, yana da tattalin arziƙin yin aiki, yana ba da kansa ga aikace-aikacen wurin aiki, kuma mafi mahimmanci, bayan shekaru da yawa na amfani, mutane suna jin daɗi da shi.
Lokacin da aka yi amfani da tef ɗin mannewa mai sassauƙa zuwa wani wuri mai ƙarfi mai rufi sannan kuma an cire shi, an kwatanta tsarin cirewa cikin sharuddan "al'amarin kwasfa," kamar yadda aka kwatanta a cikin siffa X1.1.
Kwasfa yana farawa a gefen jagorar “haƙori” (a hannun dama) kuma yana ci gaba tare da manne/musamman abin rufe fuska ko madaidaicin shafi/ substrate, ya danganta da ƙarfin haɗin gwiwa. Ana ɗauka cewa cirewar shafi yana faruwa lokacin da ƙarfin tensile da aka haifar tare da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun kayan aikin rheological na kayan tallafi da mannewa, ya fi ƙarfin haɗin gwiwa a madaidaicin shafi-substrate (ko ƙarfin haɗin gwiwa na da shafi) . A gaskiya, duk da haka, ana rarraba wannan karfi a kan nesa mai nisa (OA) a cikin siffa X1.1, wanda ke da alaka da kai tsaye ga kaddarorin da aka kwatanta, ba a mayar da hankali ba a wani batu (O) a cikin Fig.
Kamar yadda a cikin ka'idar yanayin-ko da yake ƙarfin juzu'i ya fi girma a asalin duka biyun. Ƙarfin matsawa mai mahimmanci yana tasowa daga amsawar kayan tallafi na tef zuwa miƙawa. Don haka duka rundunonin ƙwanƙwasa da ƙarfi suna da hannu a gwajin tef ɗin mannewa.
Binciken gwajin kaset game da yanayin tef ɗin da aka yi amfani da shi da kuma wasu ɓangarori na tsarin da kansa ya bayyana guda bakwai.ral dalilai, kowane ko kowane haɗuwa wanda zai iya tasiri sosai ga sakamakon gwajin kamar yadda aka tattauna (6).