Oligomers kwayoyin halitta ne da suka kunshi wasu raka'o'i masu maimaitawa, kuma su ne manyan abubuwan da ake iya warkewa na tawada UV. Tawada masu warkarwa na UV su ne tawada waɗanda za a iya bushe su kuma a warke nan take ta hanyar fallasa hasken ultraviolet (UV), wanda ya sa su dace don aiwatar da bugu mai sauri da sutura. Oligomers suna taka muhimmiyar rawa wajen tantance kaddarorin da aikin tawada masu warkarwa na UV, kamar danko, mannewa, sassauci, dorewa, da launi.
Akwai manyan nau'ikan nau'ikan nau'ikan oligomers na UV masu warkewa, wato epoxy acrylates, polyester acrylates, da urethane acrylates. Kowane aji yana da nasa halaye da aikace-aikace, dangane da nau'in substrate, hanyar warkewa, da ingancin da ake so na samfurin ƙarshe.
Epoxy acrylates sune oligomers waɗanda ke da ƙungiyoyin epoxy a cikin kashin baya, da ƙungiyoyin acrylate a ƙarshensu. An san su da babban reactivity, ƙananan danko, da kyakkyawan juriya na sinadarai. Duk da haka, suna kuma da wasu kurakurai, irin su rashin sassauci, ƙarancin mannewa, da halayen rawaya. Epoxy acrylates sun dace da bugu a kan tarkace, kamar ƙarfe, gilashi, da filastik, kuma don aikace-aikacen da ke buƙatar babban sheki da tauri.
Polyester acrylates sune oligomers waɗanda ke da ƙungiyoyin polyester a cikin kashin baya, kuma ƙungiyoyin acrylate a ƙarshen su. An san su da matsakaicin reactivity, ƙananan raguwa, da kyakkyawan sassauci. Duk da haka, su ma suna da wasu kura-kurai, kamar babban danko, ƙarancin juriyar sinadarai, da fitar wari. Polyester acrylates sun dace da bugawa a kan sassa masu sassauƙa, kamar takarda, fim, da masana'anta, da kuma aikace-aikacen da ke buƙatar mannewa mai kyau da elasticity.
Urethane acrylates sune oligomers waɗanda ke da ƙungiyoyin urethane a cikin kashin baya, kuma ƙungiyoyin acrylate a ƙarshen su. An san su da ƙananan reactivity, babban danko, da kuma kyakkyawan sassauci. Duk da haka, suna da wasu kurakurai, kamar tsada mai tsada, babban hana iskar oxygen, da ƙarancin magani. Urethane acrylates sun dace da bugu akan nau'ikan abubuwa daban-daban, kamar itace, fata, da roba, kuma don aikace-aikacen da ke buƙatar ƙarfin ƙarfi da juriya.
A ƙarshe, oligomers suna da mahimmanci don ƙirƙira da aikin tawada masu warkarwa na UV, kuma ana iya rarraba su zuwa manyan azuzuwan uku, wato epoxy acrylates, polyester acrylates, da urethane acrylates. Kowane aji yana da nasa abũbuwan amfãni da rashin amfani, dangane da aikace-aikace da substrate. Ci gaban oligomers da tawada UV tsari ne mai gudana, kuma ana bincika sabbin nau'ikan oligomers da hanyoyin warkarwa don biyan buƙatun masana'antar tawada.
Lokacin aikawa: Janairu-04-2024
