HPMC (CAS: 9004-65-3), ua ib yam khoom siv ntxiv uas siv dav hauv kev tsim kho vaj tse, feem ntau yog siv rau kev khaws dej, ua kom tuab thiab txhim kho kev ua haujlwm ntawm cov khoom tiav. Kev khaws dej yog ib qho ntawm cov cim qhia tseem ceeb thaum koj xaiv HPMC zoo, yog li cia peb saib ze dua ntawm cov yam uas cuam tshuam rau kev khaws dej ntawm HPMC.
1. Qhov ntau npaum li cas ntawm HPMC, thiab nws cov dej ua haujlwm yog sib npaug ncaj qha rau qhov ntxiv. Qhov ntau npaum li cas ntawm HPMC siv rau hauv cov ntaub ntawv tsim kho hauv khw sib txawv nyob ntawm qhov zoo. Nws feem ntau yog ntxiv rau hauv xws li kev sib txuas, plastering, anti-cracking mortar, thiab lwm yam. Qhov ntau npaum li cas ntxiv yog 2 ~ 2.5 KG / MT, qhov ntau npaum li cas ntxiv ntawm putty thiab lwm yam yog ntawm 2 ~ 4.5 KG / MT, cov kua nplaum pobzeb yog ntawm 3.5 ~ 4 KG / MT, thiab qhov ntau npaum li cas ntawm cov grout pobzeb yog 0.3 ~ 1 KG / MT raws li ntau txoj kev tsim kho, qhov dav ntawm qhov sib txawv thiab qhov zoo ntawm slurry, cov mortar self-leveling yog ntawm 0.2 ~ 0.6 KG / MT, thiab ETICS yog ntawm 4 ~ 7 KG / MT. Hauv qhov ntau no, qhov ntau HPMC ntxiv, qhov kev ua haujlwm khaws dej yuav zoo dua.
2. Kev cuam tshuam ntawm ib puag ncig kev tsim kho. Cov av noo, kub, cua siab, cua ceev thiab lwm yam yuav cuam tshuam rau qhov dej ntws hauv cov cement mortar thiab gypsum-based khoom. Hauv ntau lub caij thiab thaj chaw sib txawv, qhov dej khaws cia ntawm tib yam khoom yuav txawv, tab sis feem ntau, Kub muaj kev cuam tshuam loj rau qhov dej khaws cia, yog li muaj kev pom ntawm kev ua lag luam: HPMC nrog qhov kub siab dua gel yog cov khoom zoo nrog qhov dej khaws cia siab.
3. Cov txheej txheem tsim khoom thiab viscosity ntawm cellulose ether -HPMC. Cov pab pawg methoxy thiab hydroxypropoxy tau faib sib npaug zos raws li cov saw hlau cellulose molecular, uas tuaj yeem ua rau muaj kev sib txuas ntawm cov pa oxygen ntawm cov hydroxyl thiab ether bonds nrog dej. Lub peev xwm ntawm hydrogen bonding ua rau dej dawb dhau los ua dej khi, yog li tswj tau qhov evaporation ntawm dej thiab ua tiav cov dej khaws cia siab.
Thaum qhov viscosity ntawm HPMC nce ntxiv, qhov ceev ntawm kev khaws dej kuj nce ntxiv, qhov viscosity nce mus txog qee qib, qhov ceev ntawm kev khaws dej nce ntxiv. Nws zoo li tiaj tus. Ib qho yooj yim piav qhia. Lub luag haujlwm khaws dej ntawm HPMC raug cuam tshuam los ntawm txhua yam. Kev xaiv tsis tuaj yeem ua raws li ib qho cim qhia.
Lub sijhawm tshaj tawm: Tsib Hlis-16-2022