Hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chomwe chimagwiritsidwa ntchito kwambiri pantchito yomanga, makamaka mumatope. Monga mkulu maselo pawiri, HPMC ali ndi makhalidwe kuti zimathandiza kuti azichita bwino posungira madzi, thickening, mafuta, bata ndi kusintha adhesion.
(1) Chemical katundu ndi limagwirira ntchito HPMC
HPMC ndi non-ionic cellulose ether yopezedwa ndi kusinthidwa kwa mankhwala a cellulose achilengedwe. Magulu a hydroxypropyl ndi methyl mu kapangidwe kake ka maselo amapereka kusungunuka kwabwino komanso kukhuthala. Mankhwalawa amathandizira HPMC kugwira ntchito zofunika izi mumatope:
1.1 Ntchito yosunga madzi
Ntchito yosungira madzi ya HPMC makamaka imachokera kumagulu a hydrophilic mu kapangidwe kake ka maselo. Maguluwa amatha kupanga zomangira za haidrojeni ndi mamolekyu amadzi, potero amatsatsa bwino ndikusunga madzi. Panthawi yomanga matope, HPMC imatha kuchepetsa kutuluka kwa madzi, kusunga chinyezi mumatope, ndikuwonetsetsa kuti simenti imagwira ntchito bwino.
1.2 Kukulitsa zotsatira
HPMC imagwiranso ntchito yowonjezereka mumatope. Yankho la viscous lomwe linapangidwa pambuyo pa kusungunuka likhoza kuonjezera kugwirizana kwa matope, kuti zikhale zosavuta kupanga ndi kupanga. Izi sizimangowonjezera ntchito yomanga matope, komanso zimachepetsanso kugwedezeka kwa matope pamtunda wowongoka.
1.3 Kupaka mafuta ndi kukhazikika
Mphamvu yamafuta ya HPMC imapangitsa kuti matope azikhala osalala panthawi yosakaniza ndi kumanga, kuchepetsa zovuta zomanga. Panthawi imodzimodziyo, HPMC ili ndi kukhazikika kwabwino, komwe kungathe kupititsa patsogolo luso lodana ndi tsankho la matope ndikuwonetsetsa kugawidwa kofanana kwa zigawo zamatope.
(2) Kugwiritsa ntchito mwachindunji kwa HPMC posungira madzi amatope
HPMC imagwiritsidwa ntchito kwambiri mumitundu yosiyanasiyana yamatope, ndipo zotsatira zake zosungira madzi zimathandiza kwambiri pakuwongolera magwiridwe antchito amatope. Zotsatirazi ndizomwe zimagwiritsidwa ntchito ndi HPMC mumatope angapo wamba:
2.1 Mtondo wamba wa simenti
Mumtondo wamba wa simenti, mphamvu yosungira madzi ya HPMC imatha kuteteza matope kuti asatayike mwachangu pomanga, potero kupewa vuto la kusweka kwamatope ndi kutaya mphamvu. Makamaka kutentha kwambiri komanso malo owuma, ntchito yosunga madzi ya HPMC ndiyofunikira kwambiri.
2.2 Mtondo wolumikizana
Pomanga matope, mphamvu yosungiramo madzi ya HPMC sikuti imangothandiza kusungunuka kwa simenti, komanso imapangitsanso mgwirizano pakati pa matope ndi gawo lapansi. Izi ndizofunikira kwambiri pakumanga zida monga matailosi ndi miyala, ndipo zimatha kuletsa kugwetsa ndi kugwa.
2.3 Mtondo wodziyimira pawokha
Mtondo wodziyimira pawokha umafunikira madzi abwino komanso odzipangira okha. Kukhuthala ndi kusunga madzi kwa HPMC kumatha kupititsa patsogolo ntchito yomanga matope odziyimira pawokha, kuwonetsetsa kuti sikutaya madzi mwachangu panthawi yomwe ikuyenda komanso kudziphatika, potero kuonetsetsa kuti ntchito yomangayo ikhale yabwino.
2.4 Insulation matope
Zophatikiza zopepuka nthawi zambiri zimawonjezeredwa kumatope osungunula, zomwe zimapangitsa kuti madzi asungidwe mumatope kukhala kofunika kwambiri. Mphamvu yosungira madzi ya HPMC imatha kuwonetsetsa kuti matope otsekemera amasunga chinyezi choyenera panthawi yomanga ndi kuumitsa, kupewa kusweka ndi kuchepa, komanso kukonza mphamvu yotchinjiriza komanso kulimba kwa matope.
(3) Ubwino wa HPMC posungira madzi amatope
3.1 Kupititsa patsogolo ntchito yomanga
Kusunga madzi kwa HPMC mumatope kumatha kupititsa patsogolo ntchito yomanga matope. Kukhuthala kwake ndi kudzoza kwake kumapangitsa kuti matope azitha kugwiritsa ntchito mosavuta komanso mawonekedwe ake, kuchepetsa zovuta komanso kulimba kwa ntchito panthawi yomanga. Nthawi yomweyo, ntchito yosunga madzi ya HPMC imatha kukulitsa nthawi yotseguka yamatope, kupatsa ogwira ntchito yomanga nthawi yambiri yogwira ntchito.
3.2 Sinthani mtundu wamatope
Mphamvu yosungiramo madzi ya HPMC imathandizira kuti simenti ikhale yokwanira, potero imakulitsa mphamvu ndi kulimba kwa matope. Kuchita bwino kwa kusunga madzi kungathenso kulepheretsa matope kuti asaphwanyike ndi kuchepa panthawi yowumitsa, kuonetsetsa kuti zomangamanga ndi zabwino.
3.3 Kuchepetsa mtengo
Kugwiritsa ntchito HPMC kumatha kuchepetsa kuchuluka kwa simenti mumatope, potero kuchepetsa ndalama zomanga. Kugwiritsa ntchito kwake kusunga madzi kumathandiza kuti madzi a mumatope agwiritsidwe ntchito bwino, kuchepetsa kutaya madzi ndi kutaya. Nthawi yomweyo, HPMC imatha kuchepetsa kukonzanso kwamatope pakumanga, kupulumutsanso ndalama.
Kufunika kwa HPMC pakusunga madzi amatope kumawonekera. Kapangidwe kake kapadera ka mankhwala ndi kachitidwe kake kamapangitsa kuti azigwira ntchito yofunika kwambiri pakusunga madzi, ntchito yomanga komanso mtundu wonse wamatope. Ndi chitukuko cha makampani omangamanga, kugwiritsa ntchito HPMC kudzakhala kokulirapo komanso mozama, ndikupitiriza kuthandizira kupititsa patsogolo ntchito ndi kutsimikizika kwabwino kwa matope ndi zipangizo zina zomangira.
Nthawi yotumiza: Jul-25-2024