Pobzeb nplaum ua lub luag haujlwm tseem ceeb hauv kev tsim kho kev lag luam, muab cov kev daws teeb meem ruaj khov thiab zoo nkauj rau adhering vuas rau ntau qhov chaw. Qhov ua tau zoo ntawm cov nplais nplaum yog nyob ntawm cov ntsiab lus ntawm cov khoom tseem ceeb, ntawm cov khoom siv rov ua dua tshiab thiab cov cellulose yog ob qho khoom xyaw tseem ceeb.
1. Redispersible polymers:
1.1 Txhais thiab cov khoom:
Redispersible polymers yog hmoov additives tau los ntawm cov tshuaj tsuag kom qhuav polymer emulsions los yog dispersions. Cov polymers no feem ntau yog ua los ntawm yas acetate, ethylene, acrylics los yog lwm yam copolymer. Daim ntawv hmoov yog yooj yim los lis thiab tuaj yeem muab tso rau hauv cov nplais nplaum nplaum.
1.2 Txhim kho adhesion:
Redispersible polymers ho txhim kho qhov adhesion ntawm pobzeb adhesives rau ntau yam substrates. Lub polymer dries los tsim ib tug saj zawg zog, nplaum zaj duab xis uas tsim ib tug muaj zog daim ntawv cog lus ntawm cov nplaum thiab cov pobzeb thiab substrate. Qhov kev txhim kho adhesion yog qhov tseem ceeb rau kev ua kom lub neej ntev thiab ruaj khov ntawm cov nplais saum npoo.
1.3 Flexibility thiab tawg kuj:
Qhov sib ntxiv ntawm redispersible polymer muab cov pobzeb nplaum yooj yim, cia nws hloov mus rau qhov txav ntawm lub substrate yam tsis muaj kev tawg. Qhov kev hloov pauv no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas qhov kub thiab txias hloov pauv tuaj yeem tshwm sim, tiv thaiv kev tsim cov kab nrib pleb uas tuaj yeem cuam tshuam qhov kev ncaj ncees ntawm cov nplais saum npoo.
1.4 Dej tsis kam:
Redispersible polymers pab txhawb cov dej tsis kam ntawm cov nplais nplaum. Cov zaj duab xis polymer uas tsim raws li nws dries ua ib qho thaiv, tiv thaiv dej los ntawm kev nkag mus thiab yog li tiv thaiv daim ntawv cog lus. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov av noo xws li chav dej thiab chav ua noj, qhov twg cov av noo siab.
1.5 Constructability thiab qhib sijhawm:
Cov khoom rheological ntawm redispersible polymers ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov nplais nplaum. Lawv pab tswj kom zoo sib xws thiab xyuas kom yooj yim daim ntawv thov. Tsis tas li ntawd, cov polymer redispersible pab txuas ntxiv lub sijhawm qhib ntawm cov nplaum, muab sijhawm txaus rau cov neeg siv los kho cov pobzeb ua ntej cov nplaum nplaum.
2. Cellulose:
2.1 Txhais thiab hom:
Cellulose yog lub ntuj polymer muab tau los ntawm cov phab ntsa ntawm cov nroj tsuag thiab feem ntau yog siv los ua ib qho ntxiv hauv cov nplais nplaum. Cellulose ethers, xws li methylcellulose (MC) thiab hydroxyethylcellulose (HEC), feem ntau siv vim lawv cov dej tuav tau zoo thiab cov khoom tuab.
2.2 Kev tuav dej:
Ib qho ntawm cov haujlwm tseem ceeb ntawm cellulose hauv cov nplais nplaum yog nws lub peev xwm khaws dej. Qhov no feature ncua lub sij hawm qhib ntawm cov nplaum, yog li ncua kev ua haujlwm. Thaum cellulose nqus dej, nws tsim cov qauv zoo li gel uas tiv thaiv cov nplaum kom qhuav sai sai thaum lub sijhawm thov.
2.3 Txhim kho cov txheej txheem thiab sag kuj:
Cellulose txhim kho kev ua haujlwm ntawm cov nplais nplaum los ntawm kev tiv thaiv sagging thaum daim ntawv thov ntsug. Cov nyhuv thickening ntawm cellulose pab cov nplaum tuav nws cov duab ntawm phab ntsa, kom ntseeg tau tias cov vuas sib npaug sib npaug tsis muaj kev sib tsoo.
2.4 Txo shrinkage:
Cellulose tuaj yeem txo qhov shrinkage ntawm pobzeb nplaum thaum lub sijhawm ziab. Qhov no yog ib qho tseem ceeb heev vim hais tias ntau shrinkage tuaj yeem ua rau tsim cov voids thiab cov kab nrib pleb, cuam tshuam tag nrho kev ncaj ncees ntawm daim ntawv cog lus.
2.5 Cov nyhuv ntawm tensile zog:
Cov nplaum nplaum muaj cov cellulose los ua kom lawv lub zog tensile. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas yuav tsum tau hnyav loads los yog siab, raws li nws pab txhawb rau tag nrho cov durability thiab kev ua tau zoo ntawm cov pobzeb nto.
3. Synergistic nyhuv ntawm redispersible polymer thiab cellulose:
3.1 Compatibility:
Redispersible polymers thiab cellulose feem ntau raug xaiv rau lawv kev sib raug zoo nrog ib leeg thiab lwm yam khoom xyaw hauv cov pobzeb nplaum tsim. Qhov kev sib raug zoo no ua kom muaj qhov sib xyaw ua ke uas ua kom cov txiaj ntsig zoo ntawm txhua qhov ntxiv.
3.2 Kev sib koom ua ke:
Kev sib xyaw ua ke ntawm redispersible polymer thiab cellulose ua rau muaj kev sib koom ua ke ntawm kev sib raug zoo. Flexible films tsim los ntawm redispersible polymers ntxiv cov dej tuav thiab thickening zog ntawm cellulose, ua rau muaj zog, ruaj thiab ua hauj lwm nplaum.
3.3 Txhim khu kev ua tau zoo:
Lub redispersible polymer thiab cellulose ua ke txhim kho tag nrho cov kev ua tau zoo ntawm cov pobzeb nplaum, muab zoo adhesion, yooj, dej tsis kam, processability thiab durability. Qhov kev sib xyaw ua ke no tshwj xeeb yog qhov zoo thiab qhov tseem ceeb hauv cov ntawv thov uas yuav tsum muaj kev sib raug zoo thiab kav ntev.
Incorporating redispersible polymers thiab cellulose rau hauv pobzeb adhesives yog ib tug tswv yim thiab pov thawj xyaum nyob rau hauv kev tsim kho kev lag luam. Cov additives no ua lub luag haujlwm tseem ceeb hauv kev txhim kho adhesion, yoog raws, dej tsis kam, kev ua tiav thiab kev ua haujlwm ntev. Kev sib koom ua ke ntawm redispersible polymers thiab cellulose ua rau cov kua nplaum sib npaug uas ua tau raws li qhov xav tau ntawm kev tsim kho niaj hnub no. Raws li kev siv thev naus laus zis thiab kev tshawb fawb txuas ntxiv mus, kev tsim kho tshiab ntxiv hauv cov pobzeb nplaum qhov chaw yuav tsum tshwm sim, nrog rau kev tsom mus ntxiv rau kev ua kom zoo dua qub thiab kev ruaj khov ntawm cov ntaub ntawv tseem ceeb hauv tsev.
Post lub sij hawm: Dec-26-2023