Halaye da ƙwarewar bugu na tawada na tushen ruwa don takarda corrugatedakwatin cakulan
Tawada mai tushen ruwa samfurin tawada ne mai dacewa da muhalli wanda ya sami kulawa sosai a cikin 'yan shekarun nanakwatin irin kek. Menene bambanci tsakanin tawada mai tushen ruwa da tawada na gabaɗaya, kuma menene abubuwan da ke buƙatar kulawa da amfani? Anan, Meibang zai yi muku bayani dalla-dalla.
An yi amfani da tawada mai tushen ruwa wajen buga takarda na dogon lokaci a ƙasashen waje kuma fiye da shekaru 20 a gida. Buga takarda da aka ƙera ya samo asali daga bugu na gubar (bugu na taimako), bugu na diyya (bugu na kashe kuɗi) da bugu na ruwan roba na roba zuwa bugu na tawada mai sassauƙa na yau da kullun. Tawada mai sassauƙa na tushen ruwa kuma an haɓaka daga rosin-maleic acid modified resin series (ƙananan sa) zuwa jerin guduro acrylic (high grade). Har ila yau, farantin bugu yana wucewa daga farantin roba zuwa farantin guduro. Har ila yau, na'urar bugawa ta ci gaba a hankali daga matsi mai launi ɗaya ko biyu tare da manyan rollers zuwa na'urorin FLEXO masu launi uku ko hudu.
Abubuwan da aka haɗa da halayen tawada masu tushen ruwa iri ɗaya ne da na tawada na bugu na gaba ɗaya. Yawan tawada masu tushen ruwa yawanci sun ƙunshi masu canza launi, masu ɗaure, mataimaka da sauran abubuwa. Masu launi sune masu launi na tawada na tushen ruwa, wanda ke ba da tawada takamaiman launi. Don sanya ra'ayi mai haske a cikin gyare-gyaren gyare-gyare, masu launi gabaɗaya suna amfani da pigments tare da kyakkyawan kwanciyar hankali na sinadarai da ikon canza launi; Mai ɗaure ya ƙunshi ruwa, guduro, mahadi amine da sauran kaushi na halitta. Resin shine abu mafi mahimmanci a cikin tawada na tushen ruwa. Ana amfani da resin acrylic mai narkewa da ruwa. Bangaren ɗaure kai tsaye yana rinjayar aikin mannewa, saurin bushewa, aikin anti-stick, da dai sauransu na tawada, kuma yana rinjayar watsa tawada mai sheki da tawada. Amine mahadi yafi kula da alkaline PH darajar na tushen ruwa tawada, sabõda haka, acrylic guduro iya samar da mafi alhẽri bugu sakamako. Ruwa ko wasu abubuwan kaushi na halitta suna narkar da resins, Daidaita danko da bushewar tawada; Abubuwan taimako sun haɗa da: defoamer, blocker, stabilizer, diluent, da dai sauransu.
Kamar yadda tawada mai tushen ruwa shine sabulun sabulu, yana da sauƙi don samar da kumfa a cikin amfani, don haka ya kamata a ƙara man siliki a matsayin mai lalata don hanawa da kawar da kumfa, da inganta aikin watsawa na tawada. Ana amfani da blockers don hana saurin bushewa na tawada na tushen ruwa, hana tawada daga bushewa a kan lissafin anilox da rage manna. Mai daidaitawa na iya daidaita ƙimar PH na tawada, kuma ana iya amfani da shi azaman diluent don rage ɗankowar tawada. Ana amfani da sinadari don rage launin tawada mai tushen ruwa, kuma ana iya amfani da shi azaman mai haske don inganta hasken tawada mai tushen ruwa. Bugu da ƙari, ya kamata a ƙara wasu kakin zuma a cikin tawada mai tushen ruwa don ƙara juriya ga lalacewa.
Ana iya haɗa tawada mai tushen ruwa da ruwa kafin bushewa. Da zarar tawada ya bushe, ba zai sake narkewa cikin ruwa da tawada ba. Don haka, dole ne a motsa tawada mai tushen ruwa gabaɗaya kafin amfani da shi don kiyaye kayan haɗin tawada iri ɗaya. Lokacin ƙara tawada, idan ragowar tawada a cikin tankin tawada ya ƙunshi ƙazanta, sai a fara tace shi, sannan a yi amfani da shi da sabon tawada. Lokacin bugawa, kar a bar tawada ya bushe akan nadi na anilox don kaucewa toshe ramin tawada. Toshe yawan watsa tawada yana haifar da rashin kwanciyar hankali na bugawa. Yayin aikin bugu, flexlate yakamata a jika ta tawada koyaushe don gujewa toshe tsarin rubutu akan farantin bugu bayan tawada ya bushe. Bugu da ƙari, an gano cewa lokacin da danko na tawada na tushen ruwa ya dan kadan, bai dace ba don ƙara ruwa a hankali don kauce wa rinjayar kwanciyar hankali na tawada. Kuna iya ƙara adadin da ya dace na stabilizer don daidaita shi.
Lokacin aikawa: Maris 15-2023
