Hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chofunikira chamankhwala chomwe chimagwiritsidwa ntchito kwambiri pomanga, makamaka popanga matope. HPMC imathandizira kwambiri ntchito yomanga ndi ntchito yomaliza ya matope posintha mawonekedwe ake, kusunga madzi, kukana ming'alu ndi zina.
(1) Zinthu zoyambira za HPMC
HPMC ndi non-ionic cellulose ether yopezedwa ndi kusinthidwa kwa mankhwala a cellulose. Lili ndi zofunikira izi:
Kusungirako madzi: HPMC ikhoza kupititsa patsogolo mphamvu yosungira madzi pazinthuzo.
makulidwe zotsatira: HPMC kuonjezera mamasukidwe akayendedwe a zinthu.
Lubricity: Imathandiza kukonza magwiridwe antchito a zinthu.
Kupanga filimu: Kupanga filimu yopyapyala pamwamba pa zinthu kuti zinthuzo zikhale zolimba.
(2) Njira yochitira HPMC mumatope
1. Limbikitsani kusunga madzi
Mtondo uyenera kukhala ndi chinyezi chambiri panthawi yomanga kuti simentiyo ikhale ndi madzi okwanira. HPMC imatha kutengera mamolekyu amadzi kudzera mu kapangidwe kake ka polar, potero kupanga maukonde mumatope, kulepheretsa kutuluka kwamadzi mwachangu komanso kusamuka kwamadzi. Kusungidwa kwamadzi kumeneku ndikofunikira kwambiri pochepetsa ming'alu yowuma mumatope ndikuwonjezera mphamvu yolumikizana pakati pa matope ndi gawo lapansi.
2. Kusintha rheological katundu
HPMC akhoza kwambiri kuonjezera mamasukidwe akayendedwe a matope, kupereka zabwino rheological katundu. Panthawi yomanga, izi zimathandiza kupititsa patsogolo ntchito ndi pulasitiki ya matope, kuchepetsa kutuluka kwa magazi ndi kulekanitsa, ndikuonetsetsa kuti matope pambuyo pomanga ndi osalala komanso osalala. Nthawi yomweyo, kukhuthala kwa HPMC kumatha kupereka kumamatira kwabwino pamapangidwe okhazikika ndikuletsa matope kuti asatengeke.
3. Kupititsa patsogolo kamangidwe
HPMC imatha kupereka mafuta abwino kwambiri, kupangitsa kuti matope azikhala osalala panthawi yomanga. Izi sizimangowonjezera luso la zomangamanga, komanso zimachepetsa mphamvu ya ntchito yamanja. HPMC akhoza kusintha thixotropy wa matope, kulola kukhala mkulu mamasukidwe akayendedwe pamene osaima, facilitate ofukula yomanga, ndi kukhalabe wabwino fluidity pamene oyambitsa kapena extruding.
4. Chepetsani kuchepa kouma ndi ming'alu
Mphamvu yosungira madzi ya HPMC imatha kukulitsa nthawi ya simenti mumtondo, potero imachepetsa kuuma kwa matope ndikuchepetsa ming'alu yomwe imayamba chifukwa cha kuchepa kouma. Kuonjezera apo, mafilimu opanga mafilimu a HPMC amatha kupanga filimu yotetezera panthawi yowumitsa matope kuti achepetse kutaya kwa madzi ndipo potero amalepheretsa kusweka pamatope.
(3) HPMC imathandizira magwiridwe antchito amitundu yosiyanasiyana yamatope
1. Tondo wamba
Pakati pa matope wamba, HPMC imawonetsetsa kuti pamwamba pa matopewo ndi athyathyathya, osalala komanso omangika bwino pagawo loyambira pambuyo pomanga ndikuwongolera kusungidwa kwamadzi ndi madzimadzi. Kuphatikiza apo, ntchito ya HPMC imakulitsanso nthawi yogwiritsira ntchito matope, kupatsa ogwira ntchito yomanga nthawi yokwanira yokonza ndi kukonza.
2. Mtondo wodziwikiratu
Mtondo wodziyimira pawokha uyenera kukhala ndi madzi abwino komanso kukhuthala kwakukulu kuti zitsimikizire kuti zikuyenda bwino panthawi yomanga. HPMC kumawonjezera otaya katundu matope kudzera thickening ndi kusunga madzi, kulola kuti kufalikira mofulumira ndi bwino pomanga. Panthawi imodzimodziyo, HPMC ikhoza kupititsa patsogolo ntchito yoletsa kutuluka kwa magazi, kuteteza madzi kuti asasunthike m'mwamba panthawi yowumitsa matope, komanso kuchepetsa chiopsezo cha matuza ndi ming'alu.
3. Mtondo wa insulation
Mtondo wa insulation umafunika kusungidwa bwino kwa madzi ndi kukana ming'alu kuti muwonjezere mphamvu yomangirira pakati pa wosanjikiza ndi maziko. Kugwiritsiridwa ntchito kwa HPMC kumatha kupititsa patsogolo mphamvu ya matope otsekemera, kupititsa patsogolo kukana kwake, ndikuwonetsetsa kukhazikika kwanthawi yayitali kwa zida zotchinjiriza.
(4) Zitsanzo zogwiritsira ntchito HPMC mumatope
1. Mtondo womangira matayala
Chomangira chomangira matayala chiyenera kukhala ndi zomatira bwino ndi ntchito yomanga. Powonjezera kusungirako madzi ndi kukhuthala kwa matope, HPMC imawonetsetsa kuti matope amakhala ndi zomatira zokwanira panthawi yomanga ndikuchepetsa kuthekera kwa kugwetsa matailosi ndikugwa.
2. Pasita matope
Pulata matope kumafuna yosalala pamwamba ndi amphamvu adhesion. Kukhuthala ndi kusunga madzi kwa HPMC kumathandizira kuti matope opaka pulasitala azitha kufalikira pamtunda wokhazikika pakumanga, kuchepetsa kugwa ndi kusweka.
(5) Momwe mungagwiritsire ntchito HPMC ndi kusamala
1. Mlingo
Mlingo wa HPMC nthawi zambiri umakhala pakati pa 0.1% ndi 0.5% ya kulemera konse kwa matope. Ngati atagwiritsidwa ntchito kwambiri, matopewo amakhala owoneka bwino komanso ovuta kupanga; ngati atagwiritsidwa ntchito pang'ono, sizigwira ntchito momwe ziyenera kukhalira.
2. Kuphatikiza ndi zina zowonjezera
HPMC nthawi zambiri amagwiritsidwa ntchito limodzi ndi zowonjezera zina monga cellulose ether, rabara ufa, etc. kuti apeze ntchito yabwino yonse.
3. Onjezani dongosolo
HPMC iyenera kusakanikirana mofanana ndi zipangizo zina zowuma za ufa panthawi ya matope, ndikuwonjezera madzi ndi kusonkhezera. Njirayi imatha kutsimikizira kugawidwa kofanana kwa HPMC mumatope ndikukwaniritsa zotsatira zabwino.
Hydroxypropyl methylcellulose (HPMC) mu matope imathandizira kwambiri magwiridwe antchito onse a matope mwa kupititsa patsogolo kusungidwa kwa madzi, kuwongolera magwiridwe antchito, kuwongolera magwiridwe antchito, kuchepetsa kuchepa kouma ndi ming'alu. Monga chowonjezera chofunikira chamankhwala, sikuti chimangokwaniritsa zofunikira zogwirira ntchito zamakono zamakono, komanso zimalimbikitsa kupita patsogolo kwaukadaulo womanga matope. M'tsogolomu, ndikukula kosalekeza kwaukadaulo wopanga HPMC komanso kukulitsa malo ogwiritsira ntchito, ntchito yake mumatope ndi zida zina zomangira idzakhala yofunika kwambiri.
Nthawi yotumiza: Jun-17-2024