Hydroxypropylmethylcellulose (HPMC) yog ib qho cellulose derivative siv dav ua tus binder thiab thickener hauv ntau qhov chaw suav nrog kev tsim kho, tshuaj thiab khoom noj. HPMC yog ib qho polymer soluble hauv dej uas tuaj yeem muab cov txiaj ntsig zoo heev ua ib qho nplaum hauv kev lag luam pobzeb. Hauv tsab xov xwm no, peb tham txog lub luag haujlwm ntawm hydroxypropylmethylcellulose (HPMC) hauv cov nplaum pobzeb.
qhia
Cov nplaum rau pobzeb yog cov khoom siv polymer uas siv los nplaum cov pobzeb rau ntau yam substrates xws li cement mortar, concrete, plasterboard thiab lwm yam nto. Cov nplaum rau pobzeb muaj peev xwm muab faib ua cov nplaum organic thiab cov nplaum inorganic. Cov nplaum rau pobzeb organic feem ntau yog ua los ntawm cov polymers hluavtaws xws li epoxy, vinyl lossis acrylic, thaum cov nplaum inorganic yog ua los ntawm cement lossis cov khoom siv minerals.
HPMC yog siv dav ua cov khoom ntxiv rau hauv cov nplaum pob zeb organic vim nws cov yam ntxwv tshwj xeeb xws li kev khaws dej, ua kom tuab, thiab cov yam ntxwv rheological. Cov yam ntxwv no yog qhov tseem ceeb kom ntseeg tau tias cov nplaum pob zeb sib xyaw zoo, txhawb kev ua haujlwm zoo thiab txo lub sijhawm qhuav. HPMC kuj pab ua kom cov nplaum pob zeb muaj zog dua, ua rau nws ruaj khov dua.
kev khaws dej
Kev khaws dej yog ib qho tseem ceeb uas yuav tsum ua kom cov nplaum pobzeb tsis qhuav sai dhau. HPMC yog ib qho khoom khaws dej zoo heev, nws tuaj yeem khaws tau txog li 80% ntawm nws qhov hnyav hauv dej. Qhov no ua kom cov nplaum siv tau ntev dua, muab sijhawm rau tus neeg kho pobzeb kom tso pobzeb, txawm tias thoob plaws hnub. Tsis tas li ntawd, HPMC ua kom cov txheej txheem kho kom zoo dua, ua kom muaj kev sib txuas zoo thiab txhim kho kev ruaj khov.
cov khoom ua kom tuab
Qhov viscosity ntawm cov nplaum pobzeb muaj feem cuam tshuam ncaj qha rau qhov tuab ntawm cov sib tov, cuam tshuam rau qhov yooj yim ntawm kev siv thiab lub zog sib txuas. HPMC yog cov khoom ua kom tuab zoo uas tuaj yeem ua tiav viscosities siab txawm tias ntawm qhov concentration qis. Yog li, cov neeg tsim cov nplaum pobzeb tuaj yeem siv HPMC los tsim cov nplaum pobzeb nrog qhov sib xws haum rau txhua qhov kev xav tau daim ntawv thov tshwj xeeb.
Cov khoom rheological
Cov khoom rheological ntawm HPMC tuaj yeem txhim kho qhov ua haujlwm ntawm cov nplaum pobzeb. Viscosity hloov pauv nrog qib ntawm kev siv shear stress, ib yam khoom hu ua shear thinning. Shear thinning txhim kho cov yam ntxwv ntws ntawm cov nplaum pobzeb, ua rau nws yooj yim dua rau kev nthuav dav ntawm phab ntsa thiab pem teb nrog kev siv zog me ntsis. Tsis tas li ntawd, HPMC muab kev faib tawm sib npaug ntawm cov khoom sib xyaw, zam kev sib sau ua ke thiab kev siv tsis sib xws.
Txhim kho lub zog ntawm kev sib txuas
Qhov ua tau zoo ntawm cov nplaum rau pobzeb nyob ntawm seb muaj zog npaum li cas: cov nplaum yuav tsum muaj zog txaus kom cov pobzeb lo rau ntawm qhov chaw thiab tiv taus kev ntxhov siab uas yuav ua rau cov pobzeb tawg lossis txav mus los. HPMC pab txhawb rau qhov khoom no los ntawm kev txhim kho qhov zoo ntawm cov nplaum thiab txhim kho nws qhov kev lo. HPMC resins tsim cov nplaum rau pobzeb ua tau zoo nrog cov qib siab dua ntawm kev sib txuas thiab ua kom ruaj khov dua. Kev siv HPMC pab tiv thaiv cov grout lossis pobzeb tawg thiab ua rau cov pobzeb zoo li qub rau qhov zoo nkauj ntev dua.
xaus lus
Xaus lus, HPMC txhim kho cov nplaum pob zeb organic los ntawm kev muab ntau yam zoo, suav nrog kev khaws dej, ua kom tuab, cov khoom rheological thiab txhim kho lub zog sib txuas. HPMC lub peev xwm los txhim kho kev ua haujlwm tau zoo, txo lub sijhawm qhuav thiab tiv thaiv kev tawg pob zeb tau ua rau nws yog ib feem tseem ceeb ntawm kev lag luam pob zeb. Kev siv HPMC hauv kev tsim cov nplaum pob zeb tuaj yeem txhim kho cov khoom zoo thaum muab cov kev daws teeb meem ruaj khov, muaj zog uas ua haujlwm tau zoo li lawv zoo nkauj. Tag nrho cov txiaj ntsig no ua pov thawj tias HPMC yog cov polymer hloov pauv hauv kev lag luam nplaum pob zeb uas tab tom loj hlob.
Lub sijhawm tshaj tawm: Lub Rau Hli-21-2023