Yiziphi izici ezithinta ukufiphala kweImikhiqizo ye-EVA? Ngikholelwa ukuthi abantu abaningi bakhathazeke kakhulu ngezinkinga ezinjalo ngemikhiqizo ye-EVA. Eqinisweni, i-EVA ibonakala empilweni yasekhaya njengento eyinhloko manje. Ivamise ukusebenza njengempahla yokufaka umsindo, impahla yaphansi, impahla yokugoba, njll. kumaphrojekthi wokuhlobisa. Izinto ze-EVA zinezinzuzo eziningi njengokhaphethi, njengokumelana nokuzamazama komhlaba okuhle, ukungangeni kwamanzi, ukulwa nogesi, njll. Ngakho-ke namuhla Imithwalo ye-Dongyang Yirong izofingqa izizathu ezine ezinkulu zokufiphala kwemikhiqizo yepulasitiki ye-Eva:
Izinto ezithinta ukufiphala kwemikhiqizo yepulasitiki ye-Eva. Ukufiphala kwemikhiqizo enemibala yepulasitiki kuhlobene nokumelana nokukhanya, ukumelana komoya-mpilo, ukumelana nokushisa, ukumelana ne-asidi ne-alkali yezingulube namadayi, kanye nezici ze-resin esetshenzisiwe. Ngokwezimo zokucubungula kanye nezidingo zokusebenzisa imikhiqizo yepulasitiki, izakhiwo ezibalulwe ngenhla zezingulube ezidingekayo, odayi, ama-surfactants, ama-disperants, ama-resin othwala kanye nezithasiselo zokulwa nokuguga kufanele zihlolwe ngokuphelele lapho kukhiqizwa ama-masterbatches ngaphambi kokuthi akhethwe.
Izizathu ezine ezinkulu zokufiphala kwemikhiqizo ye-EVA:
1. Ukumelana ne-asidi ne-alkali Ukufiphala kwemikhiqizo yepulasitiki enombala kuhlobene nokungazweli kwamakhemikhali kombala (ukumelana ne-asidi ne-alkali, ukumelana ne-oxidation nokunciphisa ukumelana)
Isibonelo, i-molybdenum chrome ebomvu imelana ne-asidi ehlanjululwayo, kodwa iyazwela ku-alkali, futhi i-cadmium ephuzi ayimelani ne-asidi. Lezi mibala ezimbili kanye ne-phenolic resin kunomphumela onamandla wokunciphisa kwamanye ama-colorants, okuthinta kakhulu ukumelana nokushisa nokumelana nesimo sezulu sombala futhi kubangele ukufiphala.
2. Izakhiwo ze-Antioxidant Ezinye izibala zemvelo ziyanyamalala kancane kancane ngemva kokukhishwa kwe-oxid ngenxa yokuwohloka kwe-macromolecular noma ezinye izinguquko.
Le nqubo iwukushisa okuphezulu oxidation ngesikhathi sokucubungula kanye ne-oxidation lapho uhlangabezana nama-oxidants aqinile (afana ne-chromate ekuphuzi kwe-chrome). Ngemuva kwechibi lombala, i-azo pigment ne-chrome yellow kuxutshwe, umbala obomvu uzofiphala kancane kancane.
3. Ukuzinza kokushisa kwezingulube ezikwazi ukumelana nokushisa kubhekisela ezingeni lokuncipha kwesisindo esishisayo, ukuguga kanye nokufiphala kwe-pigment ezingeni lokushisa lokucubungula.
Izingulube ze-Inorganic zakhiwa ama-oxide ensimbi nosawoti, ezinokuzinza okuhle kokushisa nokumelana nokushisa okuphezulu. Kodwa-ke, i-pigments ye-organic compounds izoshintsha ukwakheka kwamangqamuzana kanye nenani elincane lokubola ezingeni lokushisa elithile. Ikakhulukazi ku-PP, PA, kanye nemikhiqizo ye-PET, izinga lokushisa lokucubungula lingaphezulu kuka-280 ℃. Uma sikhetha ama-colorants, ngakolunye uhlangothi, kufanele sinake ukumelana nokushisa kwe-pigment, futhi ngakolunye uhlangothi, kufanele sicabangele isikhathi sokumelana nokushisa kwe-pigment, okuvame ukudingeka ukuthi kube yi-4-10imvula.
4. Ukumelana nokukhanya Ukumelana nokukhanya kombala kuthinta ngokuqondile ukufiphala komkhiqizo
Ngemikhiqizo yangaphandle evezwe ekukhanyeni okunamandla, imfuneko yezinga lokumelana nokukhanya (ukumelana nelanga) yombala osetshenzisiwe iyinkomba ebalulekile. Uma izinga lokumelana nokukhanya liphansi, umkhiqizo uzofiphala ngokushesha ngesikhathi sokusetshenziswa. Izinga lokumelana nokukhanya elikhethelwe imikhiqizo ukumelana nesimo sezulu akumele libe ngaphansi kwezinga lesi-6, okungcono izinga 7 noma 8, kanye neleveli 4 noma 5 emikhiqizweni yasendlini. Ukumelana nokukhanya kwe-resin ye-carrier nakho kunethonya elikhulu ekushintsheni kombala. Ngemva kokuba i-resin ikhanyiswe imisebe ye-ultraviolet, ukwakheka kwayo kwamangqamuzana kuyashintsha futhi kuyafiphala. Ukwengeza iziqinisi zokukhanya ezifana nezibambisi ze-ultraviolet ku-masterbatch kungathuthukisa ukumelana nokukhanya kombala kanye nemikhiqizo yepulasitiki enombala.
Izizathu ezine ezinkulu zokufiphala kwemikhiqizo ye-EVA yepulasitiki kwabelwana ngayo lapha. Ukunaka amaphuzu angenhla kungagwema izici ezingezinhle njengokufiphala kwemikhiqizo ye-EVA; ngenxa yezinzuzo zezinto ze-EVA, manje isisetshenziswa kabanzi empilweni yansuku zonke.
Isikhathi sokuthumela: Sep-26-2024