Zotsatira za ufa wa latex ndi cellulose pakupanga matope osakanizika owuma

Ma Admixtures amathandizira kwambiri pakumanga matope osakanizika owuma. Zotsatirazi zikuwunika ndikufanizira zofunikira za ufa wa latex ndi cellulose, ndikuwunika momwe zinthu zimagwirira ntchito zamatope owuma pogwiritsa ntchito zosakaniza.

Redispersible latex ufa

Redispersible latex ufandi kukonzedwa ndi kutsitsi kuyanika wapadera polima emulsion. Ufa wowuma wa latex ndi tinthu tating'ono tozungulira 80 ~ 100mm tasonkhanitsidwa palimodzi. Tinthu tating'onoting'ono timasungunuka m'madzi ndikupanga kubalalitsidwa kokhazikika kokulirapo pang'ono kuposa tinthu tating'ono ta emulsion, zomwe zimapanga filimu itatha kutaya madzi m'thupi ndi kuyanika.

Njira zosinthira zosinthika zimapangitsa kuti ufa wa latex wogawanikanso ukhale ndi zinthu zosiyanasiyana monga kukana madzi, kukana kwa alkali, kukana kwanyengo komanso kusinthasintha. Ufa wa latex womwe umagwiritsidwa ntchito mumatope ukhoza kupititsa patsogolo kukana, kulimba, kukana kuvala, kumasuka kwa zomangamanga, mphamvu zomangirira ndi kugwirizana, kukana nyengo, kukana kuzizira, kuthamangitsa madzi, mphamvu yopindika ndi kusinthasintha kwamatope.

Cellulose ether

Ma cellulose ether ndi liwu lodziwika bwino lazinthu zingapo zopangidwa ndi momwe alkali cellulose ndi etherifying agent pansi pazifukwa zina. Ma cellulose a alkali amasinthidwa ndi ma etherifying agents osiyanasiyana kuti apeze ma cellulose ethers osiyanasiyana. Malinga ndi ma ionization olowa m'malo, ma cellulose ether amatha kugawidwa m'magulu awiri: ionic (monga carboxymethyl cellulose) ndi non-ionic (monga methyl cellulose). Malinga ndi mtundu wa zolowa m'malo, cellulose ether imatha kugawidwa kukhala monoether (monga methyl cellulose) ndi ether yosakanikirana (monga hydroxypropyl methyl cellulose). Malingana ndi kusungunuka kosiyanasiyana, kumatha kugawidwa m'madzi osungunuka (monga hydroxyethyl cellulose) ndi organic solvent-soluble (monga ethyl cellulose), etc. ogaŵikana mtundu nthawi yomweyo ndi padziko ankachitira anachedwa Kusungunuka mtundu.

Limagwirira ntchito ya cellulose ether mu matope ndi motere:

(1) Pambuyo pacellulose ethermumatope amasungunuka m'madzi, kugawa bwino ndi yunifolomu kwa zinthu za simenti mu dongosolo kumatsimikiziridwa chifukwa cha ntchito yapamtunda, ndi cellulose ether, monga colloid yoteteza, "kukulunga" tinthu tating'onoting'ono ndi A wosanjikiza wa filimu yopangira mafuta. imapangidwa pamtunda wake wakunja, womwe umapangitsa kuti matope azikhala okhazikika, komanso amapangitsa kuti madzi asamawonongeke panthawi yosakaniza ndi kusalala kwa zomangamanga.

(2) Chifukwa cha kapangidwe kake ka mamolekyu, njira ya cellulose ether imapangitsa kuti madzi a mumatope asakhale osavuta kutaya, ndipo pang'onopang'ono amawamasula kwa nthawi yayitali, ndikupangitsa kuti matopewo azikhala ndi madzi abwino osungira komanso kugwira ntchito.

matabwa ulusi

Ulusi wamatabwa umapangidwa ndi zomera monga zopangira zazikulu ndipo zimakonzedwa ndi mateknoloji angapo, ndipo ntchito yake ndi yosiyana ndi ya cellulose ether. Zofunika zazikulu ndi:

(1) Insoluble m'madzi ndi zosungunulira, komanso insoluble mu asidi ofooka ndi ofooka m'munsi njira

(2) Ntchito mu matope, izo zigwirizana mu atatu azithunzi-thunzi dongosolo mu malo amodzi, kuonjezera thixotropy ndi sag kukana matope, ndi kusintha constructability.

(3) Chifukwa cha mawonekedwe atatu a ulusi wamatabwa, ali ndi katundu wa "kutsekera madzi" mumatope osakanikirana, ndipo madzi omwe ali mumatope sangatengeke kapena kuchotsedwa mosavuta. Koma ilibe madzi osungira kwambiri a cellulose ether.

(4) Mphamvu yabwino ya capillary ya matabwa a matabwa imakhala ndi ntchito ya "kuyendetsa madzi" mumatope, zomwe zimapangitsa kuti pamwamba ndi madzi amkati amatope azikhala osasinthasintha, motero amachepetsa ming'alu yomwe imabwera chifukwa cha shrinkage yosagwirizana.

(5) Ulusi wa nkhuni ukhoza kuchepetsa kupsinjika kwa ma deformation a matope owuma ndikuchepetsa kuchepa ndi kusweka kwa matope.