Qhov tseem ceeb ntawm cov xim dispersion ntawm cov xim yas

Lub dispersion ntawm pigments yog qhov tseem ceeb heev rau cov xim ntawm cov yas. Cov nyhuv kawg ntawmximdispersion tsis tsuas yog cuam tshuam rau lub zog tinting ntawm cov xim, tab sis kuj cuam tshuam rau cov tsos ntawm cov khoom xim (xws li me ntsis, streaks, gloss, xim thiab pob tshab), thiab tseem cuam tshuam ncaj qha rau qhov zoo ntawm cov khoom xim, xws li lub zog, elongation, tsis kam ntawm cov khoom. Kev laus thiab kev tiv thaiv, thiab lwm yam, kuj cuam tshuam rau kev ua haujlwm thiab kev ua haujlwm ntawm cov yas (xws li ximmasterbatch).

Lub dispersibility ntawm pigments nyob rau hauv plastics hais txog lub peev xwm ntawm pigments los txo qhov loj ntawm aggregates thiab agglomerates rau ib tug xav tau loj tom qab ntub dej. Yuav luag tag nrho cov khoom ntawm pigments nyob rau hauv daim ntawv thov yas yog raws li qib uas pigments yuav ua tau zoo dispersed. Yog li ntawd, qhov dispersibility ntawm pigments yog ib qho tseem ceeb heev qhia rau daim ntawv thov rauyas xim.

Nyob rau hauv cov txheej txheem ntawm pigment ntau lawm, lub crystal nucleus yog thawj tsim. Kev loj hlob ntawm cov siv lead ua nucleus yog ib qho siv lead ua thaum pib, tab sis tsis ntev nws yuav loj hlob mus rau hauv ib qho polycrystal nrog cov qauv mosaic. Tau kawg, nws cov khoom tseem zoo heev, thiab cov kab me me ntawm cov khoom yog li ntawm 0.1 txog 0.5 μm, uas feem ntau hu ua thawj cov khoom lossis cov khoom tseem ceeb. Cov khoom tseem ceeb zoo li sib sau ua ke, thiab cov khoom sib sau ua ke hu ua cov khoom sib txuas. Raws li txoj kev sib txawv ntawm kev sib sau ua ke, cov khoom thib ob yog cov kev cai muab faib ua ob pawg: ib qho yog tias cov muaju txuas nrog cov npoo los yog cov ces kaum, qhov kev nyiam ntawm cov muaju yog me me, cov khoom me me yog xoob, thiab yooj yim sib cais los ntawm kev sib xyaw ua ke. dispersion, uas yog hu ua txuas. Sib sau ua ke; Lwm hom, cov muaju muaj ciam teb los ntawm cov dav hlau siv lead ua, lub zog txaus nyiam ntawm cov muaju yog qhov muaj zog, cov khoom muaj zog, hu ua aggregates, tag nrho cov cheeb tsam ntawm cov aggregates tsawg dua qhov sib npaug ntawm thaj chaw ntawm lawv cov khoom, thiab cov aggregates cia siab rau cov txheej txheem dispersion. Nws yuav luag nyuaj rau disperse.