1. Cellulose ethers (MC, HPMC, HEC)
MC, HPMC, thiab HEC feem ntau siv rau hauv kev tsim kho putty, xim, mortar thiab lwm yam khoom, feem ntau yog rau kev khaws dej thiab lubrication. nws yog qhov zoo.
Txoj kev tshuaj xyuas thiab txheeb xyuas:
Hnyav 3 grams ntawm MC lossis HPMC lossis HEC, muab tso rau hauv 300 ml dej thiab do kom txog thaum nws yaj tag rau hauv cov tshuaj, muab nws cov tshuaj aqueous tso rau hauv lub raj mis dej huv, pob tshab, khoob, npog thiab nruj lub hau, thiab muab tso rau hauv Saib cov kev hloov pauv ntawm cov kua nplaum hauv qhov chaw ib puag ncig ntawm -38 ° C. Yog tias cov tshuaj aqueous yog pob tshab thiab pob tshab, nrog viscosity siab thiab fluidity zoo, nws txhais tau tias cov khoom muaj qhov zoo thawj zaug. Txuas ntxiv saib ntau tshaj 12 lub hlis, thiab nws tseem tsis hloov pauv, qhia tias cov khoom muaj kev ruaj khov zoo thiab tuaj yeem siv nrog kev ntseeg siab; yog tias cov tshuaj aqueous pom tias maj mam hloov xim, ua nyias dua, ua turbid, muaj ntxhiab tsw rancid, muaj av noo, nthuav lub raj mis, thiab ntsws lub cev lub raj mis Deformation qhia tias cov khoom zoo tsis zoo. Yog tias nws siv rau hauv kev tsim cov khoom, nws yuav ua rau cov khoom tsis ruaj khov zoo.
2. CMCI, CMCS
Qhov viscosity ntawm CMCI thiab CMCS yog nruab nrab ntawm 4 thiab 8000, thiab lawv feem ntau yog siv rau hauv kev sib dhos phab ntsa thiab cov ntaub ntawv plastering xws li cov phab ntsa sab hauv tsev thiab cov plaster plaster rau kev khaws dej thiab lubrication.
Txoj kev tshuaj xyuas thiab txheeb xyuas:
Hnyav 3 grams ntawm CMCI lossis CMCS, muab tso rau hauv 300 ml dej thiab do kom txog thaum nws yaj tag rau hauv cov tshuaj, muab nws cov tshuaj aqueous tso rau hauv lub raj mis dej huv, pob tshab, khoob, npog thiab nruj lub hau, thiab muab tso rau hauv Saib qhov kev hloov pauv ntawm nws cov tshuaj aqueous hauv qhov chaw ntawm ℃, yog tias cov tshuaj aqueous yog pob tshab, tuab, thiab kua, nws txhais tau tias cov khoom zoo thaum pib, yog tias cov tshuaj aqueous yog turbid thiab muaj cov av qeeg, nws txhais tau tias cov khoom muaj cov hmoov ore, thiab cov khoom yog adulterated. . Txuas ntxiv saib ntau tshaj 6 lub hlis, thiab nws tseem tuaj yeem tsis hloov pauv, qhia tias cov khoom muaj kev ruaj khov zoo thiab tuaj yeem siv nrog kev ntseeg siab; yog tias nws tsis tuaj yeem tswj tau, nws pom tias cov xim yuav maj mam hloov pauv, cov tshuaj yuav dhau los ua nyias dua, dhau los ua huab, yuav muaj cov av qeeg, tsw ntxhiab tsw phem, thiab lub raj mis yuav o, qhia tias cov khoom tsis ruaj khov, yog tias siv rau hauv cov khoom, nws yuav ua rau cov khoom muaj teeb meem zoo.
Lub sijhawm tshaj tawm: Lub Ob Hlis-07-2023