Hydroxypropyl methylcellulose, tseem hu ua HPMC, yog ib qho nonionic cellulose ether tau los ntawm cov paj rwb ua kom zoo, cov khoom siv ntuj tsim los ntawm cov txheej txheem tshuaj lom neeg. Nws yog cov hmoov dawb los yog daj me ntsis uas yooj yim soluble hauv dej. Wb tham txog txoj kev sib cais ntawm hydroxypropyl methylcellulose.
1. Hydroxypropyl methylcellulose feem ntau yog siv los ua ib qho ntxiv rau putty hmoov, mortar thiab kua nplaum. Ntxiv rau cov cement mortar, nws tuaj yeem siv los ua tus neeg saib xyuas dej thiab retardant kom nce twj; ntxiv rau putty hmoov thiab kua nplaum, nws tuaj yeem siv los ua ib daim ntawv khi. Txhawm rau txhim kho kev sib kis thiab txuas ntxiv lub sijhawm ua haujlwm, peb coj Qingquan Cellulose ua piv txwv los piav qhia txog kev sib cais ntawm hydroxypropyl methylcellulose.
2. Ordinary hydroxypropyl methylcellulose yog thawj zaug nplawm thiab dispersed nrog dej kub, ces ntxiv nrog dej txias, stirred thiab txias kom yaj;
Tshwj xeeb: noj 1/5-1/3 ntawm qhov xav tau ntawm cov dej kub, do kom txog thaum cov khoom ntxiv yog o tag, ces ntxiv ib feem ntawm cov dej kub, uas tuaj yeem yog dej txias lossis dej khov dej, thiab do. qhov tsim nyog kub (10 ° C) kom txog thaum yaj tag.
3. Organic solvent wetting method:
Disperse hydroxypropyl methylcellulose nyob rau hauv cov organic hnyav los yog moisten nws nrog cov organic hnyav, thiab ces ntxiv los yog ntxiv dej txias kom yaj nws zoo. Cov kuab tshuaj organic tuaj yeem yog ethanol, ethylene glycol, thiab lwm yam.
4. Yog hais tias agglomeration los yog wrapping tshwm sim thaum lub sij hawm dissolution, nws yog vim hais tias cov stirring yog tsis txaus los yog cov qauv zoo tib yam yog ntxiv ncaj qha mus rau hauv dej txias. Hauv qhov no, do sai sai.
5. Yog tias cov npuas raug tsim tawm thaum lub sijhawm tawg, lawv tuaj yeem tso tseg rau 2-12 teev (lub sijhawm tshwj xeeb nyob ntawm qhov sib xws ntawm cov tshuaj) lossis tshem tawm los ntawm lub tshuab nqus tsev, nias, thiab lwm yam, lossis ntxiv tus nqi tsim nyog ntawm defoaming tus neeg sawv cev.
Cov kev ceev faj
Hydroxypropyl methylcellulose muab faib ua qeeb-dissolving thiab instant-dissolving hom. Instant hydroxypropyl methylcellulose tuaj yeem yaj ncaj qha hauv dej txias.
Post lub sij hawm: Feb-06-2024