Cellulose ether yog cov organic compound nrog kev ua tau zoo, uas yog siv dav hauv kev tsim cov ntaub ntawv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem ntawm cov phab ntsa putty thiab sab hauv thiab sab nrauv phab ntsa putty. Nws tuaj yeem tsis tsuas yog txhim kho kev tsim kho kev ua tau zoo ntawm putty, tab sis kuj txhim kho lub zog thiab lub zog ntawm putty tom qab thov.
1. Txheej txheem cej luam ntawm cellulose ether
Cellulose ether yog ib chav dej-soluble lossis dej-dispersible polymer compounds tsim los ntawm kev hloov kho tshuaj raws li ntuj cellulose. Cov cellulose ethers muaj xws li hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), thiab lwm yam. Cov cellulose ethers no muaj cov thickening zoo, dej tuav, lubrication, film-forming thiab lwm yam khoom, yog li lawv tau dav siv hauv tsev. cov ntaub ntawv.
2. Lub luag haujlwm ntawm cellulose ether hauv putty
Txhim kho kev tsim kho kev ua haujlwm ntawm putty
Cellulose ether txhim kho cov khoom rheological ntawm putty, kom lub workability thiab leveling zog ntawm putty tuaj yeem txhim kho, ua kom yooj yim rau kev thov thiab qib. Tshwj xeeb tshaj yog nyob rau hauv loj-scale kev tsim kho, lub thickening cuab yeej ntawm cellulose ether yuav ua rau putty zoo adhere rau ntawm phab ntsa, txo sagging, thiab xyuas kom meej stability ntawm kev tsim kho zoo.
Txhim kho kev tuav dej
Cov txheej txheej txheej yuav tsum tau tswj hwm lub xeev ntub dej thaum lub sijhawm tsim kho kom ntseeg tau tias qhov sib xws thiab adhesion ntawm cov txheej txheem ziab tom ntej. Cellulose ether molecules tuaj yeem nqus tau cov dej ntau thiab tsim cov dej molecule hauv lub putty, ua kom cov dej ntws tawm ntawm cov putty qeeb qeeb, yog li txhim kho cov dej tuav ntawm lub putty. Qhov kev tuav dej no ua rau cov putty tsis tshua muaj kev tawg lossis hmoov thaum nws tau tsim nyob rau hauv qhov kub thiab txias, ua rau lub sijhawm qhib thiab ua kom zoo ntawm cov txheej putty.
Txhim khu kev ruaj ntseg
Ua kom cov ntsiab lus ntawm cellulose ether tuaj yeem txhim kho qhov adhesion ntawm putty thiab xyuas kom meej tias lub putty yog ruaj khov rau saum npoo ntawm lub hauv paus. Thaum lub putty yog siv, cellulose ether tsis tau tsuas yog txhim khu lub toughness ntawm lub putty, tab sis kuj muab ib tug tej yam degree ntawm adhesion thaum lub sij hawm ziab txheej txheem los tiv thaiv lub putty txheej los ntawm poob los yog warping. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog rau qhov chaw du thiab tsis-absorbent bases vim cellulose ether muab ntxiv adhesion zog.
Tswj kom qhuav ceev
Cellulose ether tuaj yeem kho qhov ziab nrawm ntawm putty kom cov txheej txheej putty tuaj yeem qhuav sib npaug, yog li tiv thaiv kev tawg los ntawm dej sai sai ntawm qhov chaw. Rau kev tsim kho ntawm ntau txheej putty, qhov tsim nyog kom qhuav ceev yog qhov tseem ceeb tshwj xeeb, uas yuav pab kom muaj kev sib haum xeeb ntawm cov khaubncaws sab nraud povtseg thiab tag nrho cov nyhuv.
Txhim kho kev ua haujlwm tiv thaiv sagging
Nyob rau hauv ntsug phab ntsa lossis qab nthab, putty yog yooj yim cuam tshuam los ntawm lub ntiajteb txawj nqus thiab muaj teeb meem ntawm sagging thiab sagging. Cov nyhuv thickening ntawm cellulose ether tuaj yeem txhim kho cov viscosity thiab ruaj khov ntawm putty, tiv thaiv cov khoom los ntawm zawv zawg vim lub ntiajteb txawj nqus, thiab xyuas kom meej qhov sib txawv ntawm putty.
3. Cov hom tseem ceeb thiab kev xaiv ntawm cellulose ethers
Ntau hom cellulose ethers muaj cov teebmeem sib txawv hauv putty, thiab nws tseem ceeb heev uas yuav tsum xaiv hom cellulose ether. Cov hauv qab no yog ob peb feem ntau siv cellulose ethers thiab lawv cov yam ntxwv:
Hydroxypropyl methylcellulose (HPMC): Nws muaj cov thickening zoo, tuav dej thiab ua cov yeeb yaj kiab thiab yog siv dav hauv tsev putty. HPMC tuaj yeem txhim kho kev tsim kho thiab ua cov yeeb yaj kiab ntawm putty, ua kom putty smoother thaum thov, thiab txhim kho adhesion thiab smoothness ntawm putty.
Hydroxyethyl cellulose (HEC): Nws yog tsuas yog siv nyob rau hauv dej-raws li systems, muaj zoo thickening thiab rheology tswj muaj peev xwm, thiab feem ntau yog siv nyob rau hauv sab hauv phab ntsa putty thiab dej-raws li txheej. HEC muaj kev txhim kho tseem ceeb ntawm txheej txheej txheej ntawm putty, tab sis nws cov dej tuav yog me ntsis qis dua HPMC.
Hydroxypropyl cellulose (HPC): HPC muaj viscosity siab thiab zoo heev stability, thiab yog haum rau lub sij hawm uas yuav tsum tau siab rau anti-sagging. Ntxiv qhov tsim nyog ntawm HPC rau putty tuaj yeem txhim kho cov kev ua haujlwm tiv thaiv sagging thiab lub zog ntawm putty.
4. Daim ntawv thov zoo thiab kev ua lag luam zeem muag ntawm cellulose ethers
Daim ntawv thov qhov zoo ntawm cellulose ethers hauv putty yog qhov tseem ceeb, feem ntau yog tshwm sim hauv cov hauv qab no:
Kev txuag nqi: Cellulose ethers tuaj yeem txhim kho kev ua haujlwm ntawm putty, txo tus naj npawb ntawm reworks, thiab yog li txo cov khoom thiab nqi zog.
Kev tiv thaiv ib puag ncig: Cellulose ethers yog cov khoom siv ntuj tsim los ntawm cov khoom siv txuas ntxiv, nrog kev tiv thaiv ib puag ncig zoo, tsis muaj tshuaj lom rau tib neeg lub cev, thiab pab ua kom tau raws li cov kev xav tau ntawm cov khoom siv niaj hnub no rau kev tiv thaiv ib puag ncig ntsuab.
Kho kom haum rau ntau yam kev nyab xeeb: Cov dej tuav thiab tawg tsis kam ntawm cellulose ethers ua rau nws tsim nyog rau kev tsim kho nyob rau hauv cov huab cua sib txawv, ua tau raws li qhov xav tau ntawm cov kev tsim kho sib txawv xws li qhuav sab qaum teb thiab sab qab teb.
Kev cia siab rau kev lag luam zoo: Nrog rau kev txhim kho cov vaj tsev ntsuab thiab kev xav tau ntau ntxiv rau cov khoom siv hauv tsev, kev lag luam xav tau cellulose ethers raws li cov khoom tseem ceeb tau nce xyoo los ntawm xyoo. Tshwj xeeb tshaj yog nyob rau hauv kev lag luam kho kom zoo nkauj, cov kev cai rau phab ntsa flatness thiab nto kev zoo nkauj tau raug txhim kho, uas tau nthuav dav txoj kev loj hlob ntawm cov khoom putty. Cellulose ether ua tus hloov kho yuav muaj kev cia siab rau daim ntawv thov ntau dua.
5. Kev ceev faj rau cellulose ether hauv daim ntawv thov putty
Txawm hais tias cellulose ether muaj ntau qhov zoo hauv putty, cov ntsiab lus hauv qab no yuav tsum raug sau tseg hauv cov txheej txheem thov tiag tiag:
Kev tswj kev noj tshuaj: Kev sib ntxiv ntawm cellulose ether ntau dhau yuav ua rau muaj viscosity ntau dhau ntawm putty thiab cuam tshuam rau kev tsim kho qib. Yog li ntawd, tus nqi ntawm cov cellulose ether ntxiv rau hauv cov mis putty yuav tsum tau tswj kom muaj nuj nqis kom ntseeg tau tias kev tsim kho zoo tshaj plaws.
Uniform dispersion: Lub dispersion ntawm cellulose ether nyob rau hauv putty yuav ncaj qha rau nws cov nyhuv. Txhawm rau kom tsis txhob muaj cov agglomeration ntawm cellulose ether, nws yog ib qho tsim nyog yuav tsum tau txais cov txheej txheem nplawm kom tsim nyog thaum npaj putty kom paub meej tias nws sib npaug ntawm cov dej theem.
Compatibility nrog rau lwm yam additives: Putty qauv feem ntau muaj lwm yam additives, xws li redispersible latex hmoov, muab tub lim, thiab lwm yam. tus qauv.
Daim ntawv thov ntawm cellulose ether nyob rau hauv phab ntsa putty thiab putty tsis tsuas yog txhim kho kev tsim kho thiab daim ntawv thov cov nyhuv ntawm putty, tab sis kuj ncua lub neej kev pab cuam ntawm putty thiab txo cov teeb meem zoo los ntawm kev tsim kho tsis zoo. Nrog rau kev nthuav dav ntxiv ntawm lub tsev ntsuab thiab cov khoom siv kho kom zoo nkauj, cellulose ether, raws li ib puag ncig tus phooj ywg thiab muaj txiaj ntsig lub tsev ntxiv, muaj kev cia siab rau daim ntawv thov dav. Hauv kev tsim qauv ntawm putty formula, kev xaiv tsim nyog thiab siv cellulose ether tuaj yeem muab qhov zoo tshaj plaws flatness thiab durability rau lub tsev phab ntsa, yog li ua tau raws li cov kev cai sib txawv ntawm huab cua thiab kev tsim kho, thiab muab kev lav zoo rau kev txhim kho zoo ntawm cov tsev niaj hnub.
Post lub sij hawm: Nov-05-2024