Hydroxypropyl Methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, tshwj xeeb tshaj yog hauv kev tsim cov vuas vov. Nws yog rho tawm los ntawm cov cellulose ntuj (xws li paj rwb lossis ntoo pulp), thiab hydroxypropyl thiab methyl pawg tau qhia los ntawm kev hloov kho tshuaj, yog li muab nws cov dej zoo solubility, dej khaws cia, adhesion thiab kev hloov pauv hauv kev tsim kho.
1. Lub luag haujlwm ntawm HPMC hauv kev tso pobzeb
Txhim kho kev ua tau zoo ntawm kev tsim kho
Ntxiv HPMC rau cov nplaum pobzeb tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho. Nws tuaj yeem kho qhov sib xws ntawm cov nplaum pobzeb, ua rau nws yooj yim dua rau kev nthuav dav sib npaug ntawm phab ntsa lossis hauv pem teb, tiv thaiv kev sagging lossis swb. Nws yog qhov tseem ceeb tshwj xeeb rau cov xwm txheej tso pobzeb ntsug, uas tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho thiab kev tso pobzeb kom raug.
Txhim kho kev khaws dej
Ib qho ntawm cov haujlwm tseem ceeb tshaj plaws ntawm HPMC yog khaws dej. Nws tuaj yeem kaw cov dej noo thiab ncua qhov nkag mus sai ntawm cov dej noo rau hauv lub substrate, yog li ua kom ntseeg tau tias cov khoom siv cementitious inorganic xws li cement muaj dej noo txaus rau cov tshuaj tiv thaiv dej. Qhov no tsis yog tsuas yog pab txhim kho qhov pib lo ntawm cov nplaum pobzeb, tab sis kuj txo qhov tshwm sim ntawm kev hollowing thiab poob tawm.
Txhim kho lub zog ntawm kev sib txuas
HPMC tsim ib zaj duab xis uas yoog tau hauv cov cement mortar, uas ua rau kev sib txuas ntawm cov nplaum pobzeb thiab cov pobzeb thiab txheej hauv qab zoo dua. Nws cov yam ntxwv zoo heev rau kev tsim zaj duab xis thiab kev yoog tau ua rau cov txheej nplaum pobzeb qhuav muaj zog thiab tsis tawg, thiab tuaj yeem hloov kho tau zoo rau qhov deformation me ntsis ntawm phab ntsa lossis hauv pem teb los ntawm kev hloov pauv kub.
Ntev lub sijhawm qhib thiab lub sijhawm hloov kho
Lub sijhawm hu ua "lub sijhawm qhib" txhais tau hais tias lub sijhawm uas cov nplaum pobzeb tseem tuaj yeem ua kom muaj peev xwm sib txuas zoo tom qab tau nthuav tawm rau ntawm qhov chaw. HPMC ncua lub sijhawm no los ntawm kev khaws dej zoo, muab chaw rau cov neeg ua haujlwm tsim kho ntau dua rau kev ua haujlwm, uas yog qhov tseem ceeb tshwj xeeb thaum tsim kho hauv qhov kub siab lossis qhov chaw qhuav. Tib lub sijhawm, HPMC kuj ncua lub sijhawm "hloov kho lub sijhawm" ntawm cov pobzeb, tso cai rau cov neeg ua haujlwm tsim kho kom zoo dua cov pobzeb tshiab kom ntseeg tau tias qhov zoo ntawm kev paving.
Tiv thaiv kom tsis txhob tawg thiab ua hmoov av
Tom qab ntxiv HPMC rau cov nplaum pobzeb lossis cov cement mortar, qhov kev ywj pheej tag nrho ntawm cov khoom siv tau txhim kho, qhov kev ntxhov siab ntawm kev ntsws tau txo qis, thiab qhov kev pheej hmoo ntawm kev tawg ntawm qhov chaw los ntawm kev ntsws, kev nthuav dav thermal thiab kev sib cog lus tau txo qis. Tib lub sijhawm, lub peev xwm tsim zaj duab xis ntawm cellulose kuj ua rau qhov chaw tsis tshua muaj feem poob tawm, txhim kho qhov zoo.
2. Cov yam ntxwv ntawm HPMC
Kev yaj sai: HPMC tuaj yeem tawg sai thiab yaj hauv dej txias los tsim cov tshuaj pob tshab yam tsis muaj kev sib sau ua ke.
Kev siv tshuaj me me thiab muaj txiaj ntsig zoo: Nws cov nyiaj ntxiv zoo feem ntau yog 0.3% -1.0%, uas tuaj yeem txhim kho kev ua tau zoo ntawm cov nplaum pobzeb, nrog rau kev ua tau zoo ntawm tus nqi siab.
Kev sib raug zoo nrog lwm cov ntaub ntawv: HPMC tuaj yeem ua haujlwm zoo nrog ntau yam khoom ntxiv xws li cement, quartz xuab zeb, hmoov latex, thiab cov polymers redispersible los txhim kho kev ua tau zoo ntawm cov qauv.
Ib puag ncig zoo thiab tsis muaj tshuaj lom: HPMC yog cov khoom siv ntsuab thiab ib puag ncig uas tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis xeb, thiab zoo rau cov neeg ua haujlwm tsim kho thiab ib puag ncig.
3. Cov lus qhia thiab kev ceev faj rau kev siv
Xaiv tus qauv zoo
Cov chaw tsim kho sib txawv thiab cov hom vuas muaj cov kev cai sib txawv rau HPMC qhov viscosity, qib ntawm kev hloov pauv, dej solubility thiab lwm yam qhia. Feem ntau, HPMC siab viscosity yog qhov tsim nyog rau cov chaw tsim kho ntsug lossis cov vuas loj, uas tuaj yeem tiv thaiv kev plam zoo dua; thaum cov qauv qis viscosity yog qhov tsim nyog rau cov chaw tsim kho nrog cov kev xav tau siab dua.
Cov xwm txheej cia khoom
HPMC yuav tsum khaws cia rau hauv qhov chaw txias, qhuav thiab muaj cua nkag, tsis txhob kov cov dej noo kom tiv thaiv cov dej noo thiab agglomeration.
Kev tswj hwm cov tshuaj kom tsim nyog
Txawm hais tias qhov ntau npaum li cas ntawm HPMC tsis loj, nws muaj qhov cuam tshuam loj rau kev ua tau zoo. Kev noj ntau dhau yuav ua rau lub sijhawm qhuav ntev lossis lwm yam kev phiv, yog li qhov ntau npaum li cas yuav tsum tau tswj kom raug raws li cov mis tshwj xeeb.
Ua ib qho khoom siv tseem ceeb hauv cov ntaub ntawv tso pobzebHPMCua lub luag haujlwm tseem ceeb hauv kev txhim kho kev khaws dej, kev ua haujlwm ntawm kev tsim kho, lub zog sib txuas thiab kev ruaj khov ntawm cov nplaum pobzeb. Nrog kev txhawb nqa lub tswv yim ntawm cov ntaub ntawv tsim kho ntsuab thiab kev nce qib tas mus li ntawm cov thev naus laus zis niaj hnub no, HPMC yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev tso pobzeb thiab tag nrho kev lag luam cov ntaub ntawv tsim kho. Kev xaiv cov khoom lag luam HPMC zoo thiab hloov pauv tau yog qhov lav tseem ceeb rau kev ua kom zoo thiab kev ruaj khov ntawm kev tsim kho.
Lub sijhawm tshaj tawm: Plaub Hlis-18-2025