Cov tshuaj tua kab qhuav qhuav yog ib qho kev tsim tawm hauv xyoo 1970s, thiab tau dhau los ua ib qho ntawm cov txheej txheem ua tiav. Qhuav suspension tus neeg saib xyuas (tom qab no hu ua SC), tseem hu ua dej ncua kev kawm tus neeg saib xyuas, colloidal ncua kev kawm tus neeg saib xyuas thiab concentrated suspension tus neeg saib xyuas, yog siv los disperse insoluble los yog insoluble technical tshuaj rau hauv dej nyob rau hauv qhov kev txiav txim ntawm surfactant thiab lwm yam additives los tsim ib tug uniform thiab ruaj khov coarse suspension system. Vim tias nws qhov nruab nrab dispersion yog dej, tus neeg sawv cev ncua kev kawm ntawv muaj cov yam ntxwv ntawm tus nqi qis, kev tsim khoom ruaj ntseg, khaws cia, kev thauj mus los thiab kev siv, thiab nws yooj yim rau kev sib xyaw nrog dej thiab siv. Piv nrog rau kev tsim tshuaj tua kab nrog cov kuab tshuaj organic raws li qhov nruab nrab, nws muaj qhov zoo ntawm kev cuam tshuam rau ib puag ncig thiab tsawg dua kev puas tsuaj.
Cov txheej txheem kev npaj cov tshuab ziab khaub ncaws muaj xws li tshuaj tua kab, tshuaj tua kab, tshuaj lom neeg lub cev, tshuaj siv tshuab thiab lwm yam kev qhuab qhia, thiab kev tshawb fawb thiab kev tsim tshuab yog qhov nyuaj. Txawm hais tias tus neeg sawv cev qhuav qhuav tau tshwm sim thaum ntxov li xyoo 1970, vim muaj kev cuam tshuam ntawm kev txhim kho kev sib tsoo tshuab, surfactant thiab lwm yam thev naus laus zis, nws qhov kev nce qib tseem nyuaj rau kev sib piv nrog cov ntaub ntawv ntau npaum li emulsifiable concentrates thiab wettable hmoov. Cov ntau yam tam sim no tsim, tshwj xeeb tshaj yog feem ntau ntawm domestic qhuav suspension cov khoom, muaj lub cev tsis zoo stability, yog nquag mus rau stratification thiab nag lossis daus thaum lub sij hawm cia, thiab cov khoom xyaw zoo ntawm cov tshuaj tua kab yog nyuaj rau disperse tusyees, los yog txawm agglomerate thiab tsis tuaj yeem nchuav tawm ntawm lub ntim, uas cuam tshuam rau kev txhawb nqa thiab kev siv cov kev ncua qhuav hauv kev ua liaj ua teb.
Cov cuab yeej ua haujlwm thiab cov txheej txheem ntawm cov tshuaj tua kab qhuav qhuav yog qhov tseem ceeb heev, uas feem ntau cuam tshuam rau cov khoom zoo.
Cov ntsiab lus tseem ceeb ntawm kev tshawb fawb txog kev siv thev naus laus zis ntawm tus neeg sawv cev qhuav qhuav yog:
1. Raws li cov khoom ntawm cov khoom siv tshuaj tua kab uas tau xaiv, ib txoj hauv kev txiav txim siab, uas yog, txoj kev txiav txim siab;
2. Xaiv cov khoom tsim nyog;
3. Txiav txim seb qhov kev pub mis ntawm txhua yam khoom.
Muaj ob txoj hauv kev tseem ceeb rau kev siv tshuaj tua kab qhuav qhuav. Ib qho yog txoj kev sib tsoo superfine (tseem hu ua txoj kev sib tsoo ntub dej), thiab lwm yam yog txoj kev condensation (tseem hu ua kub yaj dispersion method). Thiab cov txheej txheem ntawm kev ua liaj ua teb cov tshuaj dej ncua kev kawm pib siv txoj kev sib tsoo ultra-nplua.
Txhawm rau kom ntseeg tau tias cov khoom siv tshuaj tua kab qhuav qhuav, Tuam Tshoj tus qauv kev lag luam tshuaj, "Specifications for the Preparation of Pesticide Dry Suspension Product Standards" (HG/T2467.5-2003), qhia tias cov khoom siv tshuaj tua kab dav dav yuav tsum tswj. cuaj qhov taw qhia, suav nrog cov ntsiab lus ntawm cov khoom xyaw zoo, qhov txwv tsis pub muaj feem cuam tshuam, pH lossis pH ntau yam, tus nqi ncua kev kawm, kev pov tseg, kev tshuaj ntsuam ntub dej, kev ua npuas ntev ntev, qhov kub thiab txias thiab thermal cia stability. Cov ntsuas no tuaj yeem ua kom ntseeg tau cov ntsiab lus ntawm cov khoom xyaw zoo thiab qee yam khoom ntawm cov khoom siv tshuaj tua kab. Txawm li cas los xij, txhawm rau kom ntseeg tau tias nws siv tau zoo, qee yam khoom tsim nyog ntawm cov tshuaj tua kab raug tshem tawm yuav tsum tau tswj. Cov khoom no muaj xws li: centrifuge stability, viscosity thiab adaptability rau cov dej zoo kuaj.
Cov tshuaj tua kab qhuav qhuav yog tam sim no lees paub tias yog ib qho kev npaj tshuaj tua kab hauv ib puag ncig, tab sis nws txoj kev koom tes hauv kev lag luam tshuaj tua kab hauv Suav teb tseem txwv tsis pub, thiab cov tshuaj tua kab ntxiv tseem yog ib qho ntawm cov kev cuam tshuam rau kev txhim kho ntawm qhov kev npaj no. Nrog rau kev nkag mus rau txawv teb chaws additives rau hauv Suav lag luam thiab kev loj hlob ntawm domestic tshuaj tua kab additives, txoj kev loj hlob ntawm cov tshuaj tua kab mob qhuav suspension agents yuav tsim sai heev.