1. Lub hom phiaj tseem ceeb ntawm hydroxypropyl methyl cellulose (HPMC) yog dab tsi?
HPMC yog dav siv nyob rau hauv cov khoom siv, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textiles, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam.HPMC tuaj yeem muab faib ua qib kev tsim kho, qib zaub mov thiab qib kho mob raws li nws lub hom phiaj.Tam sim no, feem ntau cov khoom siv hauv tsev yog qib kev tsim kho.Nyob rau hauv kev tsim kho qib, putty hmoov yog siv ntau npaum li cas, li 90% yog siv rau putty hmoov, thiab tus so yog siv rau cement mortar thiab kua nplaum.
2. Muaj ntau ntau hom hydroxypropyl methyl cellulose (HPMC).Qhov txawv ntawm lawv siv yog dab tsi?
HPMC tuaj yeem muab faib ua hom instant thiab kub-melt hom.Cov khoom lag luam tam sim no tau tawg sai sai hauv dej txias thiab ploj hauv dej.Lub sijhawm no, cov kua dej tsis muaj viscosity, vim tias HPMC tsuas yog tawg mus rau hauv dej yam tsis muaj kev sib cais tiag tiag.Txog 2 feeb, cov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid.Cov khoom kub yaj, thaum nws ntsib dej txias, nws tuaj yeem tawg sai sai hauv dej kub thiab ploj mus rau hauv dej kub.Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity maj mam tshwm kom txog thaum lub pob tshab viscous colloid tsim.Kub-melt hom tsuas yog siv rau hauv cov hmoov putty thiab mortar.Hauv cov kua nplaum thiab pleev xim, clumping tshwm sim thiab siv tsis tau.Hom instant muaj ntau yam kev siv.Nws tuaj yeem siv rau hauv cov hmoov putty thiab mortar, nrog rau cov kua nplaum thiab xim.Tsis muaj contraindications.
3. Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose HPMC?
Cov txheej txheem dej kub dissolution: Txij li HPMC tsis yaj hauv dej kub, HPMC tuaj yeem sib cais hauv cov dej kub thaum pib, thiab tom qab ntawd yaj sai sai thaum lub caij txias.Ob txoj kev raug piav raws li hauv qab no:
1).Ntxiv 1/3 los yog 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab kub rau 70 ° C.disperse HPMC los npaj cov dej kub slurry;tom qab ntawd ntxiv cov dej txias ntxiv rau cov dej kub Nyob rau hauv slurry, txias qhov sib tov tom qab stirring.
Txoj kev sib tov hmoov: sib tov HPMC hmoov nrog ntau ntawm lwm cov khoom siv hmoov, sib tov kom huv si nrog ib rab diav, thiab tom qab ntawd ntxiv dej kom yaj, ces HPMC tuaj yeem yaj nyob rau lub sijhawm no yam tsis muaj clumping thiab agglomerating, vim hais tias txhua lub kaum me me, tsuas muaj me ntsis. ntawm HPMC Cov hmoov yuav yaj tam sim ntawd thaum nws ntsib dej.-Putty hmoov thiab mortar manufacturers siv txoj kev no.[Hydroxypropyl methyl cellulose (HPMC) yog siv los ua cov thickener thiab dej-retaining tus neeg sawv cev hauv putty hmoov mortar.
Muab cov dej kub uas xav tau rau hauv lub thawv thiab kub kom txog 70 ° C.Maj mam ntxiv hydroxypropyl methylcellulose nrog qeeb nplawm, pib HPMC ntab saum npoo dej, thiab tom qab ntawd maj mam tsim cov slurry, thiab txias cov slurry nrog nplawm.
Post lub sij hawm: Nov-16-2021