Zosakaniza zimathandiza kwambiri pakukonza bwino ntchito yomanga matope osakaniza ndi madzi. Zotsatirazi zikufufuza ndikuyerekeza makhalidwe oyambira a ufa wa latex ndi cellulose, ndikusanthula momwe zinthu zopangidwa ndi matope osakaniza ndi madzi zimagwirira ntchito pogwiritsa ntchito zosakaniza.
Ufa wa latex wosungunukanso
Ufa wa latex wosungunukansoAmakonzedwa pogwiritsa ntchito kupopera kwa emulsion yapadera ya polima. Ufa wouma wa latex ndi tinthu tating'onoting'ono tozungulira ta 80 ~ 100mm tosonkhanitsidwa pamodzi. Tinthu tating'onoting'onoti timasungunuka m'madzi ndipo timapanga kufalikira kokhazikika kwakukulu pang'ono kuposa tinthu tating'onoting'ono toyambirira ta emulsion, zomwe zimapanga filimu pambuyo pa kutaya madzi ndi kuumitsa.
Njira zosiyanasiyana zosinthira zimapangitsa kuti ufa wa latex wotha kusungunukanso ukhale ndi makhalidwe osiyanasiyana monga kukana madzi, kukana alkali, kukana nyengo komanso kusinthasintha. Ufa wa latex womwe umagwiritsidwa ntchito mu matope ukhoza kuwonjezera kukana kukhudzana ndi kugwedezeka, kulimba, kukana kuwonongeka, kusavuta kumanga, mphamvu yolumikizana ndi kugwirizana, kukana nyengo, kukana kuzizira ndi kusungunuka, kukana madzi, kulimba kopindika ndi mphamvu yopindika ya matope.
Cellulose ether
Cellulose ether ndi dzina lathunthu la zinthu zingapo zomwe zimapangidwa ndi momwe alkali cellulose imagwirira ntchito komanso momwe imagwirira ntchito pansi pa mikhalidwe ina. Alkali cellulose imasinthidwa ndi zinthu zosiyanasiyana zotenthetsera kuti ipeze ma ether osiyanasiyana a cellulose. Malinga ndi momwe zinthu zosinthira zimakhalira, ma ether a cellulose amatha kugawidwa m'magulu awiri: ionic (monga carboxymethyl cellulose) ndi non-ionic (monga methyl cellulose). Malinga ndi mtundu wa substituent, cellulose ether imatha kugawidwa m'magulu awiri (monga methyl cellulose) ndi mixed ether (monga hydroxypropyl methyl cellulose). Malinga ndi kusungunuka kosiyanasiyana, imatha kugawidwa m'magulu awiri osungunuka m'madzi (monga hydroxyethyl cellulose) ndi organic solvent-soluble (monga ethyl cellulose), ndi zina zotero. Dry-mixed mortar makamaka ndi madzi-soluble cellulose, ndipo madzi-soluble cellulose imagawidwa m'magulu awiri a instant type ndi surface treated delayed dissolving type.
Limagwirira ntchito la efa wa cellulose mu matope ndi motere:
(1) Pambuyo paether ya celluloseMu matope amasungunuka m'madzi, kufalikira kogwira mtima komanso kofanana kwa zinthu zomangira simenti mu dongosolo kumatsimikizika chifukwa cha ntchito ya pamwamba, ndipo cellulose ether, monga colloid yoteteza, "imakulunga" tinthu tolimba ndipo Filimu yopaka mafuta imapangidwa pamwamba pake panja, zomwe zimapangitsa kuti matope azikhazikika, komanso zimathandizira kuti matope aziyenda bwino panthawi yosakaniza komanso kuti ntchito yomanga ikhale yosalala.
(2) Chifukwa cha kapangidwe kake ka molekyulu, yankho la cellulose ether limapangitsa kuti madzi omwe ali mu matope asamatayike mosavuta, ndipo pang'onopang'ono amawatulutsa kwa nthawi yayitali, zomwe zimapangitsa kuti matopewo azikhala ndi madzi okwanira komanso kuti azitha kugwira ntchito bwino.
ulusi wamatabwa
Ulusi wamatabwa umapangidwa ndi zomera ngati zinthu zazikulu zopangira ndipo umakonzedwa ndi ukadaulo wosiyanasiyana, ndipo magwiridwe ake ndi osiyana ndi a cellulose ether. Makhalidwe akuluakulu ndi awa:
(1) Sisungunuka m'madzi ndi zosungunulira, komanso sichisungunuka m'mayankho ofooka a asidi ndi maziko ofooka
(2) Ikagwiritsidwa ntchito mu matope, idzalumikizana kukhala kapangidwe ka magawo atatu mu mkhalidwe wosasinthasintha, kuonjezera mphamvu ya thixotropy ndi kukana kwa matope, ndikuwonjezera kupangika kwake.
(3) Chifukwa cha kapangidwe ka ulusi wa matabwa ka magawo atatu, uli ndi mphamvu ya "kutseka madzi" mu matope osakanikirana, ndipo madzi omwe ali mu matopewo sangalowe kapena kuchotsedwa mosavuta. Koma alibe madzi ambiri osungira cellulose ether.
(4) Mphamvu yabwino ya ulusi wa matabwa imakhala ndi ntchito ya "kuyendetsa madzi" mu matope, zomwe zimapangitsa kuti pamwamba ndi mkati mwa matopewo zikhale zofanana, motero zimachepetsa ming'alu yomwe imabwera chifukwa cha kusokonekera kosagwirizana.
(5) Ulusi wamatabwa ukhoza kuchepetsa kupsinjika kwa matope olimba ndikuchepetsa kuchepa ndi kusweka kwa matope.
Nthawi yotumizira: Epulo-25-2024