Kev siv hydroxypropyl methylcellulose

1. Dab tsi yog daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC)?

Teb: 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 tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm 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 methylcellulose (HPMC), thiab qhov sib txawv ntawm lawv siv yog dab tsi?

Teb: HPMC tuaj yeem muab faib ua hom instant thiab kub dissolution hom. Cov khoom lag luam tam sim no tawg sai sai hauv dej txias thiab ploj mus rau 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 ntsib nrog dej txias, tuaj yeem tawg sai sai hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity yuav maj mam tshwm kom txog thaum nws tsim cov pob tshab viscous colloid. Hom kub-melt tsuas yog siv rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum thiab pleev xim, yuav muaj kev sib koom ua ke 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 pleev xim, tsis muaj contraindications.

3. Yuav ua li cas yog cov txheej txheem dissolution ntawm hydroxypropyl methylcellulose HPMC?

Teb: Txoj kev sib cais dej kub: Txij li HPMC tsis yaj hauv dej kub, HPMC tuaj yeem sib npaug hauv cov dej kub thaum pib, thiab tom qab ntawd yaj sai sai thaum txias. Ob txoj kev raug piav raws li hauv qab no:

1), ntxiv 1/3 lossis 2/3 ntawm cov dej xav tau rau hauv lub thawv, thiab ua kom sov rau 70 ° C, disperse HPMC raws li txoj kev 1), thiab npaj cov dej kub slurry; Tom qab ntawd ntxiv cov dej txias ntxiv rau cov dej kub slurry, qhov sib tov yog txias tom qab stirring.

Txoj kev sib xyaw hmoov: sib tov HPMC hmoov nrog ntau ntau ntawm lwm cov hmoov hmoov, sib tov kom huv si nrog lub tov khoom, thiab tom qab ntawd ntxiv dej kom yaj, ces HPMC tuaj yeem yaj nyob rau lub sijhawm no yam tsis muaj agglomeration, vim tias tsuas muaj HPMC me me hauv txhua qhov me me. ces kaum hmoov, yuav yaj tam sim ntawd thaum sib cuag nrog dej. ——Putty hmoov thiab mortar manufacturers siv txoj kev no. [Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov thickener thiab dej tuav tus neeg sawv cev hauv cov hmoov mortar.

2) Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom sov li 70 ° C. Cov hydroxypropyl methylcellulose tau maj mam ntxiv nyob rau hauv qeeb stirring, pib lub HPMC ntab rau saum npoo dej, thiab ces maj mam tsim ib slurry, uas yog txias nyob rau hauv stirring.