Iimveliso zeplastikhi ezinemibala ziya kuphela ngenxa yezinto ezininzi. Ukuphela kweemveliso zeplastiki ezinemibala kuhambelana nokumelana nokukhanya, ukumelana neoksijini, ukumelana nobushushu, iasidi kunye nokumelana nealkali kwitoni, kunye neempawu zentlaka esetyenzisiweyo.
Oku kulandelayo luhlalutyo oluneenkcukacha lwezinto ezinciphayo zombala weplastiki:
1. Ukukhanya kombala
Ukukhawuleza kokukhanya kombala kuchaphazela ngokuthe ngqo ukuphela kwemveliso. Kwiimveliso zangaphandle ezivezwe kukukhanya okuqinileyo, ukukhawuleza kokukhanya (ukukhawuleza ukukhanya) kwinqanaba leemfuno zombala osetyenzisiweyo sisalathiso esibalulekileyo. Inqanaba lokukhawuleza kokukhanya lihlwempuzekileyo, kwaye imveliso iya kuphelelwa ngokukhawuleza ngexesha lokusetyenziswa. Amanqanaba okumelana nokukhanya akhethwe kwiimveliso ezinganyangekiyo zemozulu akufuneki abe ngaphantsi kwamabanga amathandathu, ngokukhethekileyo amabakala asixhenxe okanye asibhozo, kwaye iimveliso zangaphakathi zingakhetha amabanga amane okanye amahlanu.
Ukuxhathisa ukukhanya kwe-resin yenethiwekhi kunefuthe elikhulu kutshintsho lombala, kunye nolwakhiwo lweemolekyuli zentlaka luyatshintsha kwaye luphele emva kokuba ukhanyiswe yimitha yelanga. Ukongeza izikhombisi ezikhanyayo ezinje nge-ultraviolet absorbers kwi-masterbatch zinokuphucula ukumelana nokukhanya kwemibala kunye neemveliso zeplastikhi ezinemibala.
2. Ukumelana nobushushu
Ukuzinza kwe-thermal kwe-pigment-resistant pigment kubhekisa kwinqanaba lokulahleka kobunzima be-thermal, ukutshintsha kombala, kunye nokuphela kombala kubushushu bokuqhubekeka.
Izinto zombala ezingaphiliyo zenziwe ngee-oxides zesinyithi kunye neetyiwa, ezinokuzinza okuhle kobushushu kunye nokumelana nobushushu obuphezulu. Imibala yeekhompawundi eziphilayo iya kufumana utshintsho kulwakhiwo lweemolekyuli kunye nexabiso elincinci lokubola kubushushu obuthile. Ingakumbi PP, PA, iimveliso PET, lobushushu processing ingaphezulu kwe-280 ℃. Xa ukhetha imibala, umntu kufuneka aqwalasele ubushushu be-pigment, kwaye ixesha lokumelana nobushushu le-pigment kufuneka liqwalaselwe kwelinye icala. Ixesha lokumelana nobushushu lihlala liyi-4-10min. .
3. Antioxidant
Ezinye ii-pigment ze-organic ziphantsi kokwehla kwe-macromolecular okanye ezinye iinguqu emva kwe-oxidation kwaye ngokuthe ngcembe ziya kuphela. Le nkqubo ngamaqondo obushushu aphezulu e-oxidation ngexesha lokulungiswa, kunye ne-oxidation xa udibana ne-oxidants eyomeleleyo (njenge-chromate kwi-chrome etyheli). Emva kwechibi, i-azo pigment kunye ne-chrome yellow zisetyenziswa ngokudibeneyo, umbala obomvu uya ngokuthe chu.
4. Ukuchasana ne-Acid kunye nealkali
Ukuphela kweemveliso zeplastiki ezinemibala kuhambelana nokumelana nemichiza (i-asidi kunye ne-alkali ukumelana, ukumelana nokunciphisa i-oxidation). Umzekelo, i-molybdenum chrome ebomvu iyamelana ne-asidi, kodwa inovakalelo kwi-alkalis, kunye ne-cadmium etyheli ayixhomekeki kwi-asidi. Ezi zombala zimbini kunye nentlaka ye-phenolic inefuthe elomeleleyo lokunciphisa imibala ethile, echaphazela kakhulu ukuxhathisa kobushushu kunye nokumelana nemozulu kwemibala kwaye kubangele ukubuna.
Ukuphela kweemveliso ezinemibala yeplastiki, kufanele kukhethwe ngokweemeko zokusetyenziswa kunye neemfuno zokusetyenziswa kweemveliso zeplastiki, emva kovavanyo olubanzi lweepropathi ezichazwe apha ngasentla zeebala eziyimfuneko, idayi, izinto ezisebenza ngokusebenza, izinto ezasasazwayo, ii-resins zezithuthi kunye nezinto ezichasayo. izongezo zokuguga.
