Cov nplaum rau pobzeb ua lub luag haujlwm tseem ceeb hauv kev lag luam kev tsim kho, muab cov kev daws teeb meem ruaj khov thiab zoo nkauj rau kev nplaum cov pobzeb rau ntau yam nto. Qhov ua tau zoo ntawm cov nplaum rau pobzeb nyob ntawm cov ntsiab lus ntawm cov khoom ntxiv tseem ceeb, uas cov polymers uas yaj tau dua thiab cellulose yog ob qho khoom xyaw tseem ceeb.
1. Cov polymers uas tawg tau dua:
1.1 Lub ntsiab lus thiab cov khoom:
Cov polymers uas tawg tau dua yog cov hmoov ntxiv uas tau los ntawm kev tsuag kom qhuav cov polymer emulsions lossis dispersions. Cov polymers no feem ntau yog ua los ntawm vinyl acetate, ethylene, acrylics lossis lwm yam copolymers. Cov hmoov no yooj yim rau kev tuav thiab tuaj yeem siv rau hauv cov qauv nplaum pobzeb.
1.2 Txhim kho kev nplaum:
Cov polymers uas tawg tau dua tshiab ua rau cov nplaum ntawm cov vuas pobzeb lo rau ntau yam khoom siv hauv pem teb zoo dua qub. Cov polymer qhuav los ua ib daim zaj duab xis uas yoog tau thiab nplaum uas tsim kom muaj kev sib txuas zoo ntawm cov nplaum thiab cov vuas pobzeb thiab cov khoom siv hauv pem teb. Qhov kev sib txuas zoo no yog qhov tseem ceeb rau kev ua kom lub ntsej muag vuas pobzeb ruaj khov thiab ntev.
1.3 Kev ywj pheej thiab kev tawg tsis kam:
Qhov ntxiv cov polymer uas tawg tau dua tshiab ua rau cov nplaum pobzeb yooj ywm, ua rau nws hloov tau raws li kev txav ntawm lub substrate yam tsis tawg. Qhov kev ywj pheej no tseem ceeb heev rau hauv ib puag ncig uas qhov kub thiab txias hloov pauv lossis kev hloov pauv ntawm cov qauv yuav tshwm sim, tiv thaiv kev tsim cov kab nrib pleb uas yuav ua rau lub ntsej muag ntawm cov pobzeb puas tsuaj.
1.4 Kev tiv thaiv dej:
Cov polymers uas tawg tau dua tshiab pab ua rau cov nplaum pobzeb tsis kam dej. Cov zaj duab xis polymer uas tsim thaum nws qhuav ua haujlwm ua ib qho thaiv, tiv thaiv dej kom tsis txhob nkag mus thiab yog li ntawd tiv thaiv cov nplaum. Qhov no tseem ceeb heev rau cov chaw noo noo xws li chav dej thiab chav ua noj, qhov twg cov av noo siab.
1.5 Kev Tsim Kho thiab Sijhawm Qhib:
Cov khoom siv rheological ntawm cov polymers uas tawg tau ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov nplaum pobzeb. Lawv pab tswj kom muaj kev sib xws thiab ua kom yooj yim siv. Tsis tas li ntawd, cov polymer uas tawg tau pab ncua lub sijhawm qhib ntawm cov nplaum, muab sijhawm txaus rau cov neeg teeb tsa los kho qhov chaw ntawm cov pobzeb ua ntej cov nplaum teeb.
2. Cellulose:
2.1 Lub ntsiab lus thiab hom:
Cellulose yog ib qho polymer ntuj tsim los ntawm cov phab ntsa cell ntawm cov nroj tsuag thiab feem ntau siv ua cov khoom ntxiv rau hauv cov nplaum rau pobzeb. Cellulose ethers, xws li methylcellulose (MC) thiab hydroxyethylcellulose (HEC), feem ntau siv vim lawv cov dej zoo heev thiab cov khoom ua kom tuab.
2.2 Kev khaws dej:
Ib qho ntawm cov haujlwm tseem ceeb ntawm cellulose hauv cov nplaum pobzeb yog nws lub peev xwm khaws dej. Qhov no ua rau lub sijhawm qhib ntawm cov nplaum ntev dua, yog li ua kom ntev dua. Thaum cellulose nqus dej, nws tsim cov qauv zoo li gel uas tiv thaiv cov nplaum kom tsis txhob qhuav sai thaum siv.
2.3 Txhim kho kev ua haujlwm thiab kev tiv thaiv sag:
Cellulose ua rau cov nplaum pobzeb ua haujlwm tau zoo dua los ntawm kev tiv thaiv kom tsis txhob poob thaum siv ntsug. Qhov cuam tshuam ntawm cellulose ua rau cov nplaum tuab pab kom nws cov duab ntawm phab ntsa, ua kom cov pobzeb lo sib npaug yam tsis ntog.
2.4 Txo qhov ntsws:
Cov cellulose tuaj yeem txo qhov kev ntsws ntawm cov nplaum pobzeb thaum lub sijhawm ziab. Qhov no yog qhov tseem ceeb vim tias kev ntsws ntau dhau tuaj yeem ua rau muaj qhov khoob thiab tawg, ua rau puas tsuaj tag nrho ntawm cov nplaum.
2.5 Cov nyhuv rau lub zog tensile:
Cov nplaum rau pobzeb muaj cov cellulose los ua kom lawv lub zog tensile nce ntxiv. Qhov no tseem ceeb heev rau cov chaw uas raug kev thauj khoom hnyav lossis kev nyuaj siab, vim nws pab txhawb rau qhov ruaj khov thiab kev ua tau zoo ntawm cov pobzeb.
3. Cov nyhuv synergistic ntawm redispersible polymer thiab cellulose:
3.1 Kev Sib Haum Xeeb:
Cov polymers uas yaj tau dua thiab cellulose feem ntau raug xaiv vim lawv sib haum nrog ib leeg thiab lwm cov khoom xyaw hauv cov nplaum pobzeb. Qhov kev sib haum no ua kom muaj kev sib xyaw ua ke uas ua rau muaj txiaj ntsig ntau tshaj plaws ntawm txhua yam khoom ntxiv.
3.2 Kev sib koom tes ua ke:
Qhov kev sib xyaw ua ke ntawm cov polymer uas tawg tau dua tshiab thiab cellulose ua rau muaj kev sib txuas zoo. Cov zaj duab xis yooj ywm uas tsim los ntawm cov polymers uas tawg tau dua tshiab ua kom tiav cov yam ntxwv ntawm cellulose uas tuav dej thiab ua kom tuab, ua rau cov nplaum muaj zog, ruaj khov thiab siv tau.
3.3 Kev ua tau zoo dua:
Cov polymer uas yaj tau dua thiab cellulose ua ke ua rau cov nplaum pobzeb zoo dua, ua rau nws nplaum tau zoo dua, yooj ywm dua, tiv taus dej tau zoo dua, ua tau yooj yim dua thiab ruaj khov dua. Qhov kev sib xyaw ua ke no zoo heev rau cov ntawv thov uas xav tau kev sib txuas ruaj khov thiab kav ntev.
Kev siv cov polymers uas tawg tau thiab cellulose rau hauv cov nplaum pobzeb yog ib qho kev coj ua zoo thiab tau lees paub hauv kev lag luam kev tsim kho. Cov khoom ntxiv no ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev nplaum, kev ywj pheej, kev tiv thaiv dej, kev ua haujlwm tau zoo thiab kev ruaj khov mus ntev. Kev sib koom ua ke ntawm cov polymers uas tawg tau thiab cellulose ua rau muaj cov qauv nplaum sib npaug uas ua tau raws li qhov xav tau ntawm cov haujlwm tsim kho niaj hnub. Thaum thev naus laus zis thiab kev tshawb fawb txuas ntxiv mus, kev tsim kho tshiab ntxiv hauv qhov chaw nplaum pobzeb yuav tshwm sim, nrog rau kev tsom mus rau kev ua kom zoo dua qub thiab kev ruaj khov ntawm cov ntaub ntawv tsim kho tseem ceeb no.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-26-2023