Siv hydroxypropyl methylcellulose (HPMC) hauv daim ntawv nplaum muaj ntau yam zoo. HPMC yog ib qho khoom siv hluav taws xob, tsis yog-ionic, siab molecular hnyav polymer uas feem ntau siv los ua cov thickener, stabilizer, zaj duab xis qub, thiab dej tuav. Nws cov khoom tshwj xeeb ua rau nws siv dav hauv cov ntawv nplaum, tshwj xeeb tshaj yog hauv cov khoom siv hauv tsev, kev ua ntawv, textile printing thiab dyeing, tshuaj pleev ib ce, thiab tshuaj.
1. Cov dej tuav tau zoo heev
Ib qho tseem ceeb ntawm HPMC yog nws cov dej tuav tau zoo heev. Nyob rau hauv cov dej-raws li cov nplaum nplaum, HPMC tuaj yeem khaws cov dej noo hauv cov kua nplaum, yog li txuas ntxiv lub sijhawm tsim kho thiab xyuas kom meej tias cov nplaum tsis qhuav sai tom qab txheej. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog rau cov scenes uas yuav tsum tau ua hauj lwm ntev sij hawm los yog ilv tsim, xws li cov pobzeb adhesives, plastering cov ntaub ntawv, thiab lwm yam. Cov dej tuav kuj tuaj yeem txhim kho kev sib raug zoo ntawm cov substrate thiab cov nplaum, thiab txo qhov tawg thiab shrinkage ntawm cov nplaum txheej vim mus poob dej.
2. Thickening thiab rheological zog hloov kho
HPMC tuaj yeem ua kom cov viscosity ntawm cov nplaum, yog li txhim kho nws cov adhesion thiab stability. Nws hloov cov khoom rheological ntawm cov nplaum, ua kom yooj yim rau kev siv thaum siv thiab muaj kev sib kis tau zoo. Cov nyhuv thickening ntawm HPMC pab tswj qhov ntws ntsug ntawm cov nplaum thiab zam qhov ntws thiab ntws ntawm cov kua nplaum thaum tsim kho. Nws yog tshwj xeeb tshaj yog haum rau siv nyob rau hauv ntsug nto, xws li phab ntsa kho kom zoo nkauj thiab tiling.
3. Cov cuab yeej ua yeeb yaj kiab
HPMC tuaj yeem tsim cov duab pob tshab tom qab cov dej evaporates. Cov cuab yeej ua yeeb yaj kiab no ua lub luag haujlwm tseem ceeb hauv cov nplaum. Ntawm ib sab, cov yeeb yaj kiab tsim los ntawm HPMC tuaj yeem txhim kho lub zog saum npoo thiab ua haujlwm ntev ntawm cov nplaum, txo cov volatilization ntawm cov dej saum npoo av, thiab yog li ua rau kom qhuav ceev ntawm cov nplaum. Ntawm qhov tod tes, zaj duab xis kuj tuaj yeem muab qee qhov kev tiv thaiv, txo qhov cuam tshuam ntawm ib puag ncig sab nraud ntawm cov nplaum txheej, thiab txhim kho huab cua tiv thaiv thiab ya raws.
4. Txhim kho kev ua haujlwm ntawm cov nplaum
Lub xub ntiag ntawm HPMC txhim kho kev tsim kho ntawm cov nplaum nplaum. Piv txwv li, nws tuaj yeem txhim kho txoj hlua khi thiab kev ua haujlwm ntawm cov nplaum, ua rau kev tsim kho kom zoo dua. Tsis tas li ntawd, HPMC tuaj yeem txo cov npuas uas tsim los ntawm cov nplaum thaum tsim kho, ua kom tiav qhov chaw smoother thiab flatter. Tshwj xeeb tshaj yog nyob rau hauv kev tsim kho, txo cov tiam ntawm npuas pab txhim kho kev zoo nkauj thiab tag nrho cov zoo ntawm phab ntsa.
5. Txhim khu kev ruaj ntseg ntawm cov nplaum
Raws li ib tug stabilizer, HPMC tuaj yeem tiv thaiv cov nplaum los ntawm stratifying los yog teeb meem thaum khaws cia thiab kev thauj mus los. HPMC cov molecules tuaj yeem sib npaug sib npaug hauv cov nplaum los ua ib qho kev ruaj ntseg peb-dimensional network qauv, yog li kev txhim kho lub sij hawm ntev ntawm cov nplaum. Cov cuab yeej no tseem ceeb tshwj xeeb hauv ntau cov khoom siv nplaum uas yuav tsum tau khaws cia lossis thauj mus ntev.
6. Txhim kho daim ntawv cog lus
Txawm hais tias HPMC nws tus kheej tsis yog cov nplaum, nws tuaj yeem txhim kho nws txoj kev sib raug zoo los ntawm kev txhim kho lub cev ntawm cov nplaum. Los ntawm kev kho cov rheology thiab dej tuav ntawm cov nplaum, HPMC tuaj yeem xyuas kom meej tias cov nplaum txheej yog sib npaug sib npaug rau saum npoo ntawm substrate, yog li txhim kho tag nrho cov txiaj ntsig ntawm cov nplaum. Tsis tas li ntawd, HPMC tseem tuaj yeem ua ke nrog lwm cov khoom xyaw (xws li emulsions, plasticizers, thiab lwm yam) txhawm rau txhim kho cov khoom sib txuas ntawm cov nplaum.
7. Compatibility thiab kev tiv thaiv ib puag ncig
HPMC yog non-ionic cellulose derivative nrog zoo tshuaj inertness thiab zoo compatibility nrog ntau yam dej-raws li thiab hnyav-raws li nplaum nplaum. Tsis tas li ntawd, HPMC yog ntuj tsim thiab biodegradable, uas ua tau raws li cov kev cai niaj hnub no kev tiv thaiv ib puag ncig thiab kev txhim kho kom ruaj khov. Piv nrog rau qee cov khoom siv hluavtaws, HPMC tsis tsim cov khoom tsim kev puas tsuaj thaum lub sij hawm decomposition, yog li nws yog ib puag ncig zoo thiab tsim nyog rau kev siv nrog kev tiv thaiv ib puag ncig siab, xws li ntim khoom noj, khoom siv kho mob, thiab lwm yam.
8. Kub thiab kua qaub thiab alkali tsis kam
HPMC muaj qhov hloov tau zoo rau kev hloov pauv ntawm qhov kub thiab pH tus nqi thiab tuaj yeem tswj hwm nws qhov kev ua haujlwm ruaj khov nyob rau hauv ib qho kev sib txawv. Qhov no txhais tau hais tias HPMC tuaj yeem tswj tau qhov thickening zoo thiab dej tuav cov teebmeem txawm tias nyob rau qhov kub thiab txias lossis hauv cov kua qaub tsis muaj zog lossis tsis muaj zog alkaline ib puag ncig. Qhov no feature muab nws qhov zoo dua hauv qee qhov chaw tshwj xeeb, xws li cov ntawv nplaum siv nyob rau hauv qhov kub thiab txias lossis muaj zog tshuaj corrosion.
9. Anti-mildew kev ua tau zoo
HPMC muaj qee yam tshuaj tiv thaiv kab mob thiab tshuaj tua kab mob, uas ua rau nws ruaj khov dua los siv hauv qee qhov chaw tshwj xeeb. Rau cov khoom siv nplaum xws li cov khoom siv hauv tsev uas raug rau qhov chaw ntub dej rau lub sijhawm ntev, cov khoom tiv thaiv kab mob tuaj yeem ua rau lub neej kev pab cuam ntawm cov khoom thiab txo qhov kev yaig ntawm cov kab mob ntawm cov nplaum nplaum.
Daim ntawv thov ntawm HPMC hauv cov ntawv nplaum tuaj yeem txhim kho kev ua tau zoo tag nrho ntawm cov khoom. Nws tsis tsuas yog txhim kho cov dej tuav, thickening thiab stability ntawm cov nplaum, tab sis kuj txhim kho kev tsim kho kev ua tau zoo thiab txhim kho lub zog sib txuas. Tsis tas li ntawd, HPMC kev tiv thaiv ib puag ncig, kev sib raug zoo ntawm cov tshuaj lom neeg, thiab qhov kub thiab txias thiab acid thiab alkali tsis kam ntxiv nthuav nws qhov kev siv tau ntau yam ntawm cov ntawv thov scenarios. Nrog rau kev nce qib ntawm kev siv thev naus laus zis tas li, daim ntawv thov kev cia siab ntawm HPMC hauv thaj chaw ntawm cov nplaum yuav dav dua.
Post lub sij hawm: Sep-05-2024