Abanye abahlobo baye bajamelana nemeko enjalo. Andazi ukuba kutheni. Umbala wale bhegi yemidlalo uphelile emva kokusetyenziswa ixesha elide. Ekuqaleni bendicinga ukuba yinto engayi kucinywa, kodwa ngoku iphelile. Ngoko makhe sijonge izizathu zokuba kutheni. Siyintoni isizathu sokuphela kweengxowa zomdlalo we-EVA?
Izinto ezichaphazela ukubola kweplastikiEVAiimveliso. Ukuphela kweemveliso ezinemibala yeplastiki kuhambelana nokumelana nokukhanya, ukumelana neoksijini, ukumelana nobushushu, ukuxhathisa kwe-asidi kunye ne-alkali yemibala kunye nedayi, kunye neempawu ze-resin esetyenzisiweyo. Ngokweemeko zokusetyenzwa kunye neemfuno zokusetyenziswa kweemveliso zeplastiki, iipropathi ezikhankanywe ngasentla zee-pigments ezifunekayo, idayi, i-surfactants, i-dispersants, ii-resin zokuphatha kunye ne-anti-aging additives kufuneka zihlolwe ngokubanzi ngexesha lokuveliswa kwe-masterbatch ngaphambi kokukhethwa.
1. Ukumelana ne-Acid kunye ne-alkali Ukuphela kweemveliso zeplastiki ezinemibala kuhambelana nokumelana nemichiza yombala (ukumelana ne-asidi kunye ne-alkali, ukuxhathisa i-redox).
Umzekelo, i-molybdenum chromium ebomvu iyaxhathisa kwi-asidi edibeneyo, kodwa ivakalelwa kwi-alkali, kwaye i-cadmium emthubi ayinyangeki kwi-asidi. Ezi pigments zimbini kunye ne-phenolic resin zinefuthe elinamandla lokunciphisa kwimibala ethile, echaphazela kakhulu ukuxhathisa ubushushu kunye nokumelana nemozulu yemibala kwaye ibangele ukubuna.
2. I-Antioxidation: Ezinye ii-pigments eziphilayo ziphela ngokuthe ngcembe ngenxa yokuthotywa kwee-macromolecules okanye ezinye iinguqu emva kwe-oxidation.
Le nkqubo ibandakanya i-oxidation yobushushu obuphezulu ngexesha lokucubungula kunye ne-oxidation xa udibana nee-oxidants ezinamandla (ezifana ne-chromate kwi-chromium yellow). Xa amachibi, i-azo pigments kunye ne-chrome etyheli zixutywe, umbala obomvu uya kuncipha ngokuthe ngcembe.
3. Ukuzinza kwe-Thermal ye-pigment ekwazi ukumelana nobushushu kubhekiselele kwiqondo lokuncipha kobunzima be-thermal, ukujika kombala, kunye nokuncipha kwebala phantsi kobushushu bokusebenza.
Izithako ze-pigments ze-inorganic pigments zi-oxide zetsimbi kunye neetyuwa, ezinozinzo oluhle lwe-thermal kunye nokumelana nokushisa okuphezulu. Ii-pigments ezenziwe kwi-organic compounds ziya kutshintsha kwi-molecular structure kunye nexabiso elincinci lokubola kwiqondo lokushisa elithile. Ngokukodwa kwi-PP, i-PA, kunye neemveliso ze-PET, iqondo lokushisa lingaphezulu kwe-280 ° C. Xa ukhetha i-colorants, kwelinye icala, kufuneka sinikele ingqalelo ekuxhathiseni ubushushu be-pigment, kwaye kwelinye icala, kufuneka siqwalasele ixesha lokumelana nobushushu be-pigment. Ixesha lokumelana nobushushu lidla ngokuba yi-4-10imvula. .
Ixesha lokuposa: Jul-12-2024