Ngikholwa ukuthi abantu abaningi bakhathazeke kakhulu ngenkinga yokushabalala yepulasitikiIzikhwama zamathuluzi e-EVA, pho yini ebangela ukuthi izikhwama zamathuluzi ziphele? Ukufiphala kwemikhiqizo enemibala yepulasitiki kuhlobene nokumelana nokukhanya, ukumelana komoya-mpilo, ukumelana nokushisa, ukumelana ne-asidi ne-alkali kwezingulube nodayi, kanye nezakhiwo ze-resin esetshenzisiwe. Ake sikuhlaziye kafushane ngezansi.
1. Ukumelana ne-Acid kanye ne-alkali Ukufiphala kwemikhiqizo yepulasitiki enombala kuhlobene nokumelana kwamakhemikhali kombala (ukumelana ne-asidi ne-alkali, ukumelana ne-redox).
Isibonelo, i-molybdenum chromium ebomvu imelana nama-asidi ahlanjululwayo, kodwa izwela i-alkali, futhi i-cadmium ephuzi ayimelani ne-asidi. Lezi mibala ezimbili kanye ne-phenolic resin kunomthelela onamandla wokunciphisa emibalabala ethile, okuthinta kakhulu ukumelana nokushisa kanye nokumelana nesimo sezulu semibalabala futhi kubangele ukufiphala.
2. I-Antioxidation: Ezinye izibala zemvelo ziyanyamalala kancane kancane ngenxa yokuwohloka kwama-macromolecules noma ezinye izinguquko ngemva kwe-oxidation.
Le nqubo ibandakanya i-oxidation yezinga eliphezulu lokushisa ngesikhathi sokucubungula kanye ne-oxidation lapho uhlangabezana nama-oxidants aqinile (afana ne-chromate ku-chromium yellow). Lapho amachibi, i-azo pigments kanye ne-chrome yellow kuhlanganiswa, umbala obomvu uzofiphala kancane kancane.
3. Ukuzinza kokushisa kombala okwazi ukumelana nokushisa kubhekisela ezingeni lokuncipha kwesisindo esishisayo, ukuguquguquka, kanye nokufiphala kwe-pigment ngaphansi kwezinga lokushisa lokucubungula.
Izingulube ze-Inorganic zakhiwa ama-oxide ensimbi nosawoti, ezinokuzinza okuhle kokushisa nokumelana nokushisa okuphezulu. Ama-pigments enziwe ngama-organic compounds azoshintsha ukwakheka kwamangqamuzana kanye nenani elincane lokubola ekushiseni okuthile. Ikakhulukazi emikhiqizweni ye-PP, PA, kanye ne-PET, izinga lokushisa lokucubungula lingaphezulu kuka-280°C. Uma sikhetha ama-colorants, ngakolunye uhlangothi, kufanele sinake ukumelana nokushisa kwe-pigment, futhi ngakolunye uhlangothi, kufanele sicabangele isikhathi sokumelana nokushisa kwe-pigment. Isikhathi sokumelana nokushisa ngokuvamile siyimvula engu-4-10. .
4. I-Lightfastness Ukukhanya okungaguquki kwemibala kuthinta ngokuqondile ukufiphala kwemikhiqizo.
Emikhiqizweni yangaphandle evezwe ekukhanyeni okuqinile, izinga lokukhanya (ukushona kwelanga) lombala osetshenzisiwe liyinkomba ebalulekile. Uma izinga lokukhanya liphansi, umkhiqizo uzofiphala ngokushesha ngesikhathi sokusetshenziswa. Ibanga lokumelana nokukhanya elikhethelwe imikhiqizo ekwazi ukumelana nesimo sezulu akufanele libe ngaphansi kwezinga lesithupha, futhi kungcono kakhulu ukukhetha amazinga esikhombisa noma ayisishiyagalombili. Ngemikhiqizo yasendlini, izinga lesine noma lesihlanu lingakhethwa.
Ukumelana nokukhanya kwe-resin ye-carrier nakho kunethonya elikhulu ekushintsheni kombala. Ngemva kokuba inhlaka ikhanyiswe imisebe ye-ultraviolet, ukwakheka kwayo kwamangqamuzana kuyashintsha nombala uyanyamalala. Ukwengeza iziqinisi ezikhanyayo ezifana nezibambisi ze-ultraviolet ku-masterbatch kungathuthukisa ukumelana nokukhanya kwama-colorants nemikhiqizo yepulasitiki enemibala.
Isikhathi sokuthumela: Jul-05-2024