(1) Txheej txheem cej luam ntawm instant hydroxypropyl methylcellulose
Instant hydroxypropyl methylcellulose (HPMC) yog cov cellulose ether uas tsis yog ionic tau los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj thiab muaj cov yam ntxwv solubility zoo thiab viscosity. Nws cov qauv molecular muaj cov hydroxyl, methoxy thiab hydroxypropoxy pawg. Cov pab pawg ua haujlwm no muab nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, ua rau nws tseem ceeb hauv ntau yam kev siv.
(2) Kev ua haujlwm ntawm HPMC hauv kev tsim kho cov nplaum
Hauv kev tsim kho, HPMC yog ib qho tseem ceeb ntxiv thiab siv dav hauv ntau yam nplaum tsim kho, xws li cov nplaum pobzeb, cov phab ntsa putties, cov av qhuav, thiab lwm yam. Nws cov haujlwm tseem ceeb hauv cov nplaum tsim kho suav nrog:
1. Cov nyhuv tuab
HPMC tuaj yeem ua rau cov nplaum siv hauv kev tsim kho kom muaj viscosity thiab sib xws ntau dua. Nws cov nyhuv ua kom tuab yog los ntawm nws cov khoom o hauv dej thiab cov qauv sib txuas hydrogen sib txuas ntawm cov molecular. viscosity tsim nyog tuaj yeem txhim kho kev ua haujlwm ntawm cov ntaub ntawv thaum lub sijhawm tsim kho thiab tiv thaiv cov nplaum kom tsis txhob poob thaum siv rau ntawm cov chaw ntsug, yog li ua kom ntseeg tau tias kev tsim kho zoo.
2. Cov nyhuv ntawm kev khaws dej
HPMC muaj cov yam ntxwv zoo heev uas khaws dej tau zoo, uas tuaj yeem txo qhov dej poob thaum lub sijhawm tsim kho. Kev khaws dej yog ib qho tseem ceeb ntawm cov nplaum tsim kho. Tshwj xeeb tshaj yog rau cov ntaub ntawv ua los ntawm cement thiab gypsum, qhov cuam tshuam ntawm kev khaws dej ntawm HPMC tuaj yeem ncua lub sijhawm qhib ntawm cov nplaum, muab kev kho thiab lub sijhawm tsim kho ntev dua, tiv thaiv kev tawg ntxov thiab txo lub zog.
3. Txhim kho kev ua haujlwm tau zoo
HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov nplaum hauv kev tsim kho, suav nrog kev ua haujlwm zoo, kev tsim kho thiab kev tiaj tus. Nws cov nyhuv lubricating ua rau cov nplaum yooj yim dua rau kev siv thiab khawb thaum lub sijhawm tsim kho, txhim kho kev ua haujlwm ntawm kev tsim kho thiab qhov chaw tiaj tus ntawm kev tsim kho, thiab ua kom muaj txiaj ntsig zoo kawg.
4. Txhim kho lub zog sib txuas
HPMC tuaj yeem ua kom cov nplaum thiab cov khoom siv sib txuas zoo dua thiab txhim kho lub zog ntawm cov nplaum los ntawm kev tsim cov txheej sib txuas zoo thiab sib xws. Qhov no tseem ceeb rau kev ruaj khov ntawm cov qauv tsev xws li phab ntsa thiab pem teb, thiab tuaj yeem tiv thaiv cov vuas, cov vuas ntsej muag, thiab lwm yam kom tsis txhob poob.
5. Kev ua tau zoo tiv thaiv kev plam
Hauv cov ntawv thov xws li cov nplaum rau pobzeb, HPMC tuaj yeem txhim kho cov khoom siv lub peev xwm tiv thaiv kev plam. Qhov no pab kom cov pobzeb ruaj khov rau ntawm cov chaw tsim kho ntsug, txo qhov zaus ntawm kev hloov kho thiab kev ua haujlwm, thiab yog li txhim kho qhov zoo ntawm kev tsim kho.
(3) Cov ntawv thov tshwj xeeb ntawm HPMC hauv cov nplaum sib txawv ntawm lub tsev
1. Cov nplaum rau pobzeb
Hauv cov nplaum pobzeb, HPMC tsis yog tsuas yog ua lub luag haujlwm hauv kev ua kom tuab thiab khaws cov dej, tab sis kuj txhim kho kev ua haujlwm tiv thaiv kev plam ntawm cov nplaum pobzeb, ua kom ntseeg tau tias cov pobzeb ruaj khov thaum lub sijhawm tsim kho. Nws cov yam ntxwv rheological tshwj xeeb ua rau cov nplaum tuav tau qhov viscosity tsim nyog nyob rau hauv ntau yam kev tsim kho, ua rau nws yooj yim kho thiab tsim kho.
2. Cov khoom siv pleev rau phab ntsa
HPMC feem ntau ua lub luag haujlwm hauv kev khaws dej thiab ua kom cov putty tuab, ua rau cov putty ua haujlwm tau zoo dua thiab muaj qhov chaw du tom qab ziab. Nws cov dej khaws cia tuaj yeem txo qhov tawg thiab ntsws ntawm cov txheej putty thaum lub sijhawm tsim kho, thiab txhim kho qhov zoo ntawm cov txheej kawg.
3. Cov av nplaum qhuav
Hauv cov mortar qhuav, lub luag haujlwm tseem ceeb ntawm HPMC yog khaws cov dej noo thiab tiv thaiv kev poob dej thaum ntxov, yog li txhim kho kev ua haujlwm thiab kev nplaum ntawm cov mortar. Nws kuj tseem tuaj yeem kho qhov sib xws ntawm cov mortar kom haum rau ntau yam kev tsim kho, xws li masonry mortar, plastering mortar, thiab lwm yam.
4. Cov tshuaj nplaum rau kev tsim kho
HPMC feem ntau yog siv rau hauv kev tsim cov sealant los txhim kho qhov fluidity thiab workability ntawm cov colloid, yog li nws tuaj yeem sib npaug cov pob qij txha thaum lub sijhawm thov thiab tswj tau qhov elasticity thiab lo. Nws cov dej khaws cia kuj tseem tuaj yeem tiv thaiv cov sealant kom tsis txhob poob dej sai dhau thiab txhim kho qhov zoo ntawm kev tsim kho.
(4) Cov txiaj ntsig ntawm HPMC hauv kev tsim cov nplaum
Kev tiv thaiv ib puag ncig: HPMC yog los ntawm cov cellulose ntuj, muaj cov khoom siv tshuaj ruaj khov, tsis tso tawm cov tshuaj lom neeg thaum siv, thiab zoo rau ib puag ncig thiab tib neeg lub cev.
Kev Ruaj Ntseg: HPMC muaj kev ruaj ntseg tshuaj zoo thiab tsis yooj yim cuam tshuam los ntawm cov yam ntxwv ib puag ncig xws li kub thiab pH, thiab tuaj yeem tswj nws cov kev ua tau zoo ntev.
Kev Sib Tw: HPMC sib xws nrog ntau yam khoom siv hauv tsev thiab tuaj yeem sib xyaw zoo nrog cov ntaub ntawv xws li cement, gypsum, thiab mortar kom ua rau nws cov haujlwm tuab thiab khaws dej.
(5) Cov qauv kev loj hlob yav tom ntej
Nrog rau kev txhim kho thev naus laus zis hauv kev tsim kho, kev siv HPMC hauv cov nplaum tsim kho yog dav heev. Cov kev taw qhia kev txhim kho yav tom ntej suav nrog:
Kev txhim kho kev ua haujlwm: Txhim kho qhov ua tau ntau yam ntawm HPMC los ntawm kev hloov kho tshuaj lossis kev sib xyaw nrog lwm cov khoom ntxiv kom tau raws li qhov xav tau ntawm cov ntawv thov kev tsim kho sib txawv.
Cov khoom lag luam uas zoo rau ib puag ncig: Tsim cov khoom lag luam HPMC uas zoo rau ib puag ncig thiab lwj tau kom txo qhov cuam tshuam rau ib puag ncig.
Cov ntaub ntawv ntse: Tshawb nrhiav kev siv HPMC hauv cov ntaub ntawv tsim kho ntse, xws li cov nplaum kho tus kheej, cov ntaub ntawv teb rau qhov kub thiab txias, thiab lwm yam, los txhim kho qib kev txawj ntse ntawm cov ntaub ntawv tsim kho.
Tam sim ntawd hydroxypropyl methylcellulose, ua ib qho tseem ceeb ntxiv rau cov nplaum hauv tsev, ua lub luag haujlwm tseem ceeb hauv kev txhim kho qhov viscosity, dej khaws cia, thiab cov khoom siv hauv kev tsim kho ntawm cov nplaum. Nws daim ntawv thov hauv cov nplaum pobzeb, phab ntsa putty, qhuav mortar thiab lwm yam teb tau txhim kho qhov zoo thiab kev ua haujlwm ntawm kev tsim kho. Yav tom ntej, los ntawm kev tsim kho tshiab tas mus li thiab kev txhim kho kev paub txog ib puag ncig, kev siv HPMC hauv cov nplaum hauv tsev yuav coj mus rau qhov chaw loj hlob dav dua.
Lub sijhawm tshaj tawm: Lub Rau Hli-14-2024