Ukubaluleka kokuhlakazeka kwe-pigment kumbala wepulasitiki

Ukuhlakazwa kwezingulube kubaluleke kakhulu ekubaleni amapulasitiki. Umphumela wokugcina weumbalaukuhlakazeka akuthinti kuphela amandla okuthayela kwe-pigment, kodwa futhi kuthinta ukubukeka komkhiqizo onemibala (njengamabala, ama-streaks, i-gloss, umbala nokucaca), futhi kuthinta ngokuqondile ikhwalithi yomkhiqizo onemibala, njengamandla, ubude, ukumelana komkhiqizo. Ukuguga nokumelana nokumelana, njll., nakho kuthinta ukusebenza kokucubungula nokusebenza kokusetshenziswa kwamapulasitiki (okuhlanganisa nombalamasterbatch).

I-dispersibility of pigments in plastics ibhekisela emandleni ombala wokunciphisa usayizi wama-aggregates nama-agglomerates kusayizi oyifunayo ngemva kokumanzisa. Cishe zonke izakhiwo ze-pigments ekusetshenzisweni kwepulasitiki zisekelwe ezingeni lapho ama-pigments angahlakazeka kahle. Ngakho-ke, i-dispersibility of pigments iyinkomba ebaluleke kakhulu yohlelo lokusebenzaumbala wepulasitiki.

Enqubweni yokukhiqizwa kwe-pigment, i-crystal nucleus iqala ukwakhiwa. Ukukhula kwe-crystal nucleus kuyikristalu eyodwa ekuqaleni, kodwa ngokushesha ikhula ibe i-polycrystal enesakhiwo se-mosaic. Yiqiniso, izinhlayiya zayo zisalungile, futhi usayizi womugqa wezinhlayiya cishe u-0.1 kuya ku-0.5 μm, ngokuvamile obizwa ngokuthi izinhlayiya eziyinhloko noma izinhlayiya eziyinhloko. Izinhlayiya eziyinhloko zivame ukuhlangana, futhi izinhlayiya ezihlanganisiwe zibizwa ngokuthi izinhlayiya zesibili. Ngokwezindlela ezihlukene zokuhlanganisa, izinhlayiya zesibili zihlukaniswa ngokwejwayelekile zibe izigaba ezimbili: enye iwukuthi amakristalu axhunywe imiphetho yekristalu noma ama-engeli, ukukhangana phakathi kwamakristalu kuncane kakhulu, izinhlayiya zikhululekile, futhi zihlukaniswa kalula ukuhlakazeka, okubizwa ngokuthi okunamathiselwe. Ukuhlanganisa; olunye uhlobo, amakristalu ahlanganiswe izindiza ze-crystal, amandla akhangayo phakathi kwamakristalu aqinile, izinhlayiya ziqinile, ezibizwa ngokuthi ama-aggregates, indawo ephelele ye-aggregates ingaphansi kwesamba sezindawo ezingaphezulu zezinhlayiya zazo, futhi ama-aggregate ancike ezinqubweni zokusabalalisa ezijwayelekile. Kucishe kube nzima ukuhlakazeka.