Tawada ita ce babbar hanyar gurɓatar da masana'antar bugawa; Yawan tawada a duk shekara a duniya ya kai tan miliyan 3. Gurbacewar yanayi na shekara-shekara (VOC) da tawada ke haifarwa ya kai dubunnan ton. Wadannan kwayoyin volatiles na iya samar da mafi tsanani greenhouse sakamako fiye da carbon dioxide, da kuma a karkashin sakawa a iska na hasken rana zai samar da oxides da photochemical hayaki, tsanani gurbatawa na yanayi yanayi, shafi lafiyar mutane. A halin yanzu, babbantawada kare muhalliyana da nau'ikan nau'ikan:
1) Tawada mai tushen ruwa
Tawada mai tushen ruwa yana amfani da ruwa maimakon kaushi na halitta, wanda ke rage fitar da VOC sosai kuma baya shafar lafiyar ɗan adam. Ba shi da sauƙi don ƙonawa, tawada mai tsayi, launi mai haske, ba ya lalata farantin, aiki mai sauƙi, farashi mai sauƙi, mai kyau adhesion bayan bugu, ƙarfin ruwa mai ƙarfi, bushewa da sauri. Abu ne da aka sani a duniya na bugu na kare muhalli.
2) Tawada UV curable
UV tawada yana nufin amfani da hasken UV, tare da tsayin raƙuman ruwa daban-daban da ƙarfi a ƙarƙashin hasken UV don yin gyaran fim ɗin tawada. Amfani da makamashi mai ban mamaki, mai ɗaure tawada a cikin polymerization na monomers zuwa polymers, Don haka fim ɗin launi na UV yana da kyawawan kayan inji da sinadarai. A halin yanzu tawada UV ya zama fasahar tawada mafi balagagge, gurɓataccen gurɓataccensa yana da ƙanƙanta. Bugu da ƙari, babu sauran ƙarfi, UV tawada ba shi da sauƙin manna, bayyananniyar dige, launi mai haske, kyakkyawan juriya na sinadarai, amfani, da sauran fa'idodi.
3) Tawada mai tushen soya
Ana yin tawada mai tushen waken soya da man waken soya da ake ci (ko wasu busassun mai ko busassun kayan lambu) gauraye da pigments, resins, waxes da sauransu. Wannan tawada ba ya ƙunshe da mahaɗan ma'adanai waɗanda ke ƙazantar da yanayi, mara wari, mara guba, sannu a hankali yana maye gurbin tawada mai ma'adinai. Shaharar sa da haɓakawa yana da sauri sosai a Turai, Japan da Amurka.
4) Tawada UV na tushen ruwa
UV na tushen ruwa yana cikin tawada UV wanda aka ƙara wani adadin ruwa da 5%kare muhallisauran ƙarfi, haɗe da guduro tushen ruwa na musamman. Wannan ya sa tawada ba kawai yana riƙe da fa'idodin tawada UV da sauri ba, ceton makamashi, ƙaramin sawun ƙafa, kariyar muhalli, amma har ma don cimma maganin tawada, ƙarancin ɗanɗano, don buƙatun bugu na bugu na tawada. Wannan tawada sabuwar alkibla ce ta bincike a fagen tawada UV.
5) Tawada mai narkewar barasa
Barasa mai narkewa tawada dogara ne a kan ethanol (giya) a matsayin babban kaushi, mara guba, aminci, kare muhalli, kiwon lafiya, shi ne manufa maye gurbin gargajiya roba tawada kayayyakin. A Koriya ta Kudu, Singapore, tawada mai narkewar barasa ya maye gurbin tawada toluene. Tawada mai narkewar barasa yana taka rawa a cikiflexoHakanan tawada ce mai dacewa da muhalli.
Lokacin aikawa: Mayu-05-2022
