Hydroxypropyl methylcellulose HPMC txoj kev yaj

Hydroxypropyl methylcellulose, tseem hu ua HPMC, yog cov cellulose ether nonionic tau los ntawm paj rwb refined, ib yam khoom siv polymer ntuj, los ntawm ntau yam txheej txheem tshuaj lom neeg. Nws yog ib qho hmoov dawb lossis me ntsis daj uas yooj yim yaj hauv dej. Cia peb tham txog txoj kev yaj ntawm hydroxypropyl methylcellulose.

1. Hydroxypropyl methylcellulose feem ntau yog siv ua cov khoom ntxiv rau cov hmoov putty, mortar thiab kua nplaum. Ntxiv rau cov cement mortar, nws tuaj yeem siv ua tus neeg sawv cev khaws dej thiab retardant kom nce pumpability; ntxiv rau cov hmoov putty thiab kua nplaum, nws tuaj yeem siv ua tus binder. Txhawm rau txhim kho qhov kis tau thiab ntev lub sijhawm ua haujlwm, peb coj Qingquan Cellulose ua piv txwv los piav qhia txog txoj kev yaj ntawm hydroxypropyl methylcellulose.

2. Cov hydroxypropyl methylcellulose ib txwm yog thawj zaug do thiab dispersed nrog dej kub, ces ntxiv nrog dej txias, do thiab txias kom yaj;

Tshwj xeeb: siv 1/5-1/3 ntawm cov dej kub uas xav tau, do kom txog thaum cov khoom ntxiv o tag, tom qab ntawd ntxiv cov dej kub seem, uas tuaj yeem yog dej txias lossis dej khov, thiab do kom txog thaum qhov kub tsim nyog (10 ° C) kom txog thaum yaj tag.

3. Txoj kev ntub dej ntawm cov kuab tshuaj organic:

Muab hydroxypropyl methylcellulose yaj rau hauv cov organic solvent los yog ua kom nws ntub nrog cov organic solvent, thiab tom qab ntawd ntxiv los yog ntxiv dej txias kom yaj zoo. Cov organic solvent tuaj yeem yog ethanol, ethylene glycol, thiab lwm yam.

4. Yog tias muaj kev sib sau ua ke lossis kev qhwv thaum lub sijhawm yaj, nws yog vim tias qhov kev sib xyaw tsis txaus lossis tus qauv ib txwm raug ntxiv ncaj qha rau hauv dej txias. Ntawm lub sijhawm no, sib xyaw sai sai.

5. Yog tias cov npuas dej tshwm sim thaum lub sijhawm yaj, 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 kev nqus tsev, nias, thiab lwm yam, lossis ntxiv cov tshuaj tua npuas kom tsim nyog.

Cov kev ceev faj

Hydroxypropyl methylcellulose muab faib ua ob hom uas yaj qeeb thiab hom uas yaj sai. Hydroxypropyl methylcellulose uas yaj sai tuaj yeem yaj ncaj qha rau hauv dej txias.