Hydroxypropylencellulose (HPMC) yog lub cellulose ether tau los ntawm cov khoom ntuj xws li ntoo pulp thiab paj rwb linters. Vim nws cov khoom muaj txiaj ntsig, suav nrog cov dej solubility, thickening muaj peev xwm, zaj duab xis-forming khoom, thiab lwm yam siv hauv ntau yam lag luam. Ib qho ntawm cov ntsiab lus tseem ceeb los txiav txim siab thaum siv HPMC yog nws cov viscosity, uas tuaj yeem cuam tshuam zoo heev rau nws txoj kev ua tau zoo hauv cov chaw siv sib txawv. Hauv tsab xov xwm no, peb tham txog vim li cas cellulose hpmc nrog cov viscosities sib txawv, thiab cov neeg viscosity sib txawv tuaj yeem pab ua kom zoo HPMC kev ua tau zoo.
Viscosity yog kev ntsuas ntawm cov kua dej tsis kam mus ntws thiab yog qhov kev txiav txim siab tseem ceeb thaum tsim cov khoom lag luam uas xav tau cov yam ntxwv tshwj xeeb. Viscosity cuam tshuam rau kev ua tau zoo ntawm HPMC vim tias nws txiav txim siab nws lub peev xwm los tsim cov tshuaj pleev, cov tuab ntawm cov txheej, thiab lwm yam khoom siv lub cev. HPMC muaj nyob rau hauv ntau hom neeg txawv teb chaws, qib feem ntau tau ua viscosity qis (LV), nruab nrab me viscosity (MV) thiab siab viscosity (hv). Txhua ntawm cov hom no muaj lub hom phiaj tshwj xeeb thiab haum rau ib puag ncig ib puag ncig.
Tsis muaj viscosity (LV) HPMC
Tsis muaj viscosity HPMC muaj qhov hnyav me me thiab yog cov soluble yooj yim rau hauv dej. Nws yog hom HPMC nquag tshaj plaws thiab yog siv nyob rau hauv ntau yam kev lag luam xws li cov zaub mov noj suav nrog cov zaub mov noj, cov tshuaj pleev ib ce, tsim khoom siv. LV HPMC yog qhov zoo tshaj plaws rau cov kev siv uas xav tau qhov nruab nrab voscosity daws teeb meem, emulsions thiab xim. LV HPMC kuj tseem siv tau los txuas lub txee lub neej ntawm cov khoom noj, txo cov synergesis thiab muab cov syneresesis thiab muab cov syneresesis thiab muab cov syneresesis thiab muab cov syneresesis thiab muab cov syneresesis thiab muab cov syneresesis thiab muab ib qho kev ntxhib los mos thiab muab cov tshuaj kho kom zoo.
LV HPMC tseem siv nyob rau hauv kev tsim kho kev tsim kho los txhim kho kev ua haujlwm ntawm cov khoom siv Maas-based xws li Mortars, Grouts thiab vile cov nplaum. Nws pab kom txo cov dej poob hauv cov xis mas sib xyaw, tiv thaiv kev tawg, thiab ntxiv dag zog rau cov khoom sib khi ntawm cov ntaub ntawv. LV HPMC kuj tseem siv tau los ua kom lub zog thiab cov kav dej ruaj khov ntawm plaster, stucco thiab lwm yam khoom siv cuam tshuam.
Nruab nrab viscosity (MV) HPMC
Nruab nrab viscosity HPMC muaj qhov hnyav dua molecular hnyav dua li LV HPMC thiab yog tsis yog soluble hauv dej. Nws yog feem ntau siv nyob rau hauv cov ntawv thov uas yuav tsum tau muaj ntau cov kev daws teeb meem xws li txheej, varnishes thiab inks. MV HPMC muaj kev tswj hwm zoo dua thiab thov cov khoom zoo dua li LV HPMC, ua rau muaj cov khaub ncaws tsis zoo thiab zoo nkauj thiab zoo nkauj. MV HPMC tseem tuaj yeem siv ntau ntau yam li ntau ntau yam, muab cov khoom siv ntxiv rau ntau yam kev siv.
MV HPMC tseem muaj dav hauv cov khoom lag luam kws tshuaj, xws li cov tshuaj tso tawm, raws li nws qeeb dua cov khoom xyaw nquag.
Siab viscosity (hv) hpmc
Siab viscosity HPMC muaj qhov hnyav siab tshaj plaws ntawm tag nrho peb qib thiab yog cov dej tsawg dua. Nws yog feem ntau siv nyob rau hauv cov ntawv thov uas yuav tsum tau ua thickening thiab stetilizing cov yam ntxwv, xws li cov kua ntses, cov tshuaj pleev cov qab zib thiab cov gels. HV HPMC pab txhim kho cov kev ntxhib los mos thiab viscosity ntawm cov khoom, muab ib qho kev paub zoo dua. Nws kuj tseem tuaj yeem siv los ua kom muaj emulsions, tiv thaiv kev sib luag thiab ntev ntev lub neej. Ib qho ntxiv, HV HPMC feem ntau siv hauv kev lag luam daim ntawv los txhim kho daim ntawv muaj zog thiab luam tawm.
Hauv kev xaus
Qhov tseeb viscosity ntawm HPMC yog qhov tseem ceeb rau kev ua kom zoo dua nws qhov kev ua tau zoo hauv cov chaw siv sib txawv. LV HPMC yog qhov zoo tshaj plaws rau cov kev siv uas xav tau cov kev daws teeb meem me me xws li cov xim av, varnishes thiab inks. Thaum kawg, HV HPMC yog qhov tsim nyog rau cov ntawv thov uas yuav tsum tau siv cov khoom siv thickening thiab ruaj khov xws li cream, kua txiv thiab kua qaub. Xaiv cov viscosity yog tuaj yeem pab txhim kho kev ua tau zoo ntawm HPMC thiab ua kom nws haum ntau rau cov ntawv thov sib txawv.
Lub sij hawm Post: Aug-31-2023