UV curing fasahar wani nau'i ne na high-inganci, kare muhalli, makamashi-ceton da high quality-butter surface fasahar.An san shi a matsayin sabon fasaha don masana'antar kore a cikin karni na 21st.Tare da haɓakar kimiyya da fasaha, aikace-aikacen fasahar warkarwa ta UV ya haɓaka daga farkon bugu na alluna da masu ɗaukar hoto zuwa UV curing coatings, tawada da adhesives.Filin aikace-aikacen yana faɗaɗawa, yana samar da sabon masana'antu.
Kayayyakin maganin UV galibi ana rarraba su zuwa suturar UV, tawada UV da mannen UV.Babban fasalin su shine cewa suna da saurin warkarwa, gabaɗaya tsakanin ƴan daƙiƙai zuwa dubun daƙiƙa, kuma mafi sauri ana iya warkewa cikin 0.05 ~ 0.1s.Su ne mafi saurin bushewa da warkewa a tsakanin sutura daban-daban, tawada da adhesives a halin yanzu.
Maganin UV yana nufin maganin UV.UV shine gajartawar Ingilishi ta UV.Curing yana nufin tsarin da abubuwa ke canzawa daga ƙananan ƙwayoyin cuta zuwa polymers.Maganin UV gabaɗaya yana nufin yanayin warkewa ko buƙatun sutura (paints), tawada, adhesives (manne) ko wasu tukunyar tukunyar da ke buƙatar maganin UV, waɗanda suka bambanta da warkar da dumama, warkarwa tare da adhesives (maganin warkarwa), warkewar yanayi, da sauransu. [1].
Abubuwan asali na samfuran warkarwa na UV sun haɗa da oligomers, diluents masu aiki, masu amfani da hoto, ƙari da sauransu.Oligomer shine babban jikin samfuran warkarwa na UV, kuma aikinsa yana ƙayyade ainihin aikin kayan da aka warke.Sabili da haka, zaɓi da ƙira na oligomer babu shakka muhimmiyar hanyar haɗi ce a cikin ƙirar samfuran warkarwa UV.
Abin da waɗannan oligomers suke da shi shi ne cewa duk suna da resins ɗin da ba a yarda da su ba an tsara su ta hanyar amsawar radical polymerization: acryloyloxy> methacrylyloxy> vinyl> allyl. Saboda haka, oligomers da aka yi amfani da su a cikin maganin UV na kyauta sun fi yawa daban-daban resins acrylic, irin su epoxy acrylate, polyurethane acrylate, polyester acrylate, polyether acrylate, acrylate resin ko vinyl resin, kuma mafi yawan amfani da su shine epoxy acrylate resin, polyurethane acrylate resin da polyester acrylic resin.Wadannan resin guda uku an gabatar dasu a takaice a kasa.
Epoxy acrylate
Epoxy acrylic acid darajar ita ce mafi yawan amfani da ita kuma mafi girman adadin UV curing oligomer a halin yanzu.An shirya shi daga resin epoxy da (meth) acrylate.Za a iya raba Epoxy acrylates zuwa bisphenol A epoxy acrylates, phenolic epoxy acrylates, modified epoxy acrylates da epoxidized acrylates bisa ga tsarin su, kuma bisphenol A epoxy acrylates ne aka fi amfani da su.
Bisphenol A epoxy acrylate yana daya daga cikin oligomers tare da saurin warkar da haske.Fim ɗin da aka warke yana da ƙarfi mai ƙarfi, babban sheki, kyakkyawan juriya na sinadarai, juriya mai kyau da kayan lantarki.Bugu da kari, bisphenol A oxygen musayar acrylate yana da sauki albarkatun kasa dabara da kuma low price.Sabili da haka, ana amfani da shi azaman babban guduro don takarda mai haske, itace, filastik da murfin ƙarfe, haka kuma a matsayin babban guduro don maganin tawada mai haske da manne haske.
Polyurethane acrylate
Polyurethane acrylate (PUA) wani muhimmin oligomer UV ne mai warkewa.An haɗa shi ta hanyar amsawar mataki biyu na polyisocyanate, diol mai tsayi mai tsayi da hydroxyl acrylate.Saboda da yawa Tsarin na polyisocyanates da dogayen sarkar diols, oligomers tare da saitin kaddarorin suna hada ta hanyar kwayoyin zane.Saboda haka, su ne oligomers tare da mafi yawan samfuran samfuran a halin yanzu, kuma ana amfani da su sosai a cikin kayan shafa na UV, tawada da adhesives.
Polyester Acrylate
Polyester acrylate (PEA) kuma oligomer na kowa ne, wanda aka shirya daga ƙananan nauyin polyester glycol ta acrylate.Polyester acrylate yana da ƙarancin farashi da ƙarancin danko.Saboda ƙananan danko, polyester acrylate za a iya amfani dashi azaman oligomer da diluent mai aiki.Bugu da ƙari, yawancin polyester acrylates suna da ƙananan wari, ƙananan fushi, sassauci mai kyau da kuma launi mai launi, kuma sun dace da fenti mai launi da tawada.Domin inganta babban magani kudi, za a iya shirya multifunctional polyester acrylate;Amine modified polyester acrylate ba zai iya kawai rage tasirin iskar oxygen polymerization hanawa, inganta warkewa kudi, amma kuma inganta mannewa, sheki da kuma sa juriya.
Abubuwan diluents masu aiki yawanci suna ƙunshe da ƙungiyoyi masu amsawa, waɗanda zasu iya narke da dilute oligomers, kuma suna taka muhimmiyar rawa a cikin tsarin warkar da UV da kaddarorin fim.Dangane da adadin ƙungiyoyin masu amsawa, abubuwan da ake amfani da su na yau da kullun na monofunctional sun haɗa da isodecyl acrylate, lauryl acrylate, hydroxyethyl methacrylate, glycidyl methacrylate, da sauransu;Diluents masu aiki na bifunctional sun haɗa da jerin polyethylene glycol diacrylate, dipropylene glycol diacrylate, neopentyl glycol diacrylate, da dai sauransu;Multifunctional aiki diluents kamar trimethylolpropane triacrylate, da dai sauransu [2].
Mai farawa yana da tasiri mai mahimmanci akan ƙimar warkewar samfuran UV.A cikin samfuran maganin UV, adadin photoinitiator gabaɗaya shine 3% ~ 5%.Bugu da kari, pigments da filler additives suma suna da tasiri mai mahimmanci akan aikin ƙarshe na samfuran warkewar UV.
Lokacin aikawa: Juni-15-2022