HPMC (Hydroxypropyl Methylcellulose) ndi zinthu zosungunuka za polima zomwe zimagwiritsidwa ntchito kwambiri pomanga. Amapangidwa makamaka ndi cellulose yachilengedwe yachilengedwe kudzera mukusintha kwamankhwala. Chifukwa cha zabwino zake zakuthupi ndi zamankhwala, HPMC ikugwiritsidwa ntchito kwambiri pomanga zida. Sikuti zimangowonjezera ntchito yomanga ya zida zomangira, komanso zimawonjezera mphamvu zawo zakuthupi.
1. Zotsatira za HPMC pamatope a simenti
Tondo la simenti ndilofala kwambiri pomanga ndipo limagwiritsidwa ntchito makamaka pomanga makoma, pansi, ndi zina zotero. Kugwiritsa ntchito HPMC mumatope a simenti kungabweretse kusintha kwakukulu, makamaka muzinthu izi:
(1) Kuwongolera magwiridwe antchito
HPMC ali wabwino thickening katundu ndipo akhoza kwambiri kuonjezera kugwirizana kwa matope simenti, motero kuwongolera workability ake. Izi zikutanthauza kuti panthawi yomanga, matope ogwiritsira ntchito HPMC ndi osavuta kugwira ntchito poyambitsa ndi kugwiritsa ntchito, kuchepetsa ndalama zogwirira ntchito, ndipo akhoza kuchepetsa kutuluka kwa magazi ndikuwonjezera kukhazikika kwa zinthuzo.
(2) Wonjezerani maola otsegulira
Nthawi yotsegulira imatanthawuza nthawi yomwe matope a simenti amatha kugwira ntchito bwino panthawi yomanga. M'malo otsika kapena otentha kwambiri, nthawi yotsegulira matope a simenti ikhoza kukhala yayifupi. Kugwiritsa ntchito HPMC kumatha kukulitsa nthawiyi, kupewa kuumitsa matope msanga, komanso kuthandiza ogwira ntchito yomanga kukhala ndi nthawi yochulukirapo yokonza panthawi yomanga.
(3) Limbikitsani kukana kwa crack
HPMC ikhoza kupititsa patsogolo kumamatira kwa matope a simenti, ndikupangitsa kuti ikhale yochepa kwambiri ku ming'alu pansi pa kuyanika kwa shrinkage ndi kusintha kwa kutentha. Kuchulukitsa kukana kwa matope kungapangitse kukhazikika kwa nyumbayo, makamaka m'malo monga makoma akunja ndi pansi omwe amakhudzidwa mosavuta ndi chilengedwe.
(4) Limbikitsani kukana madzi
Mtengo wa HPMC imathanso kupititsa patsogolo ntchito yosalowa madzi yamatope a simenti. Akagwiritsidwa ntchito m'malo achinyezi, amatha kuchepetsa kulowa kwa madzi ndikuwonjezera moyo wautumiki wa nyumbayo.
2. Zotsatira za HPMC pamatope owuma
Dothi louma ndi chinthu chomangira chosakanizidwa chomwe chimangofunika kusakanikirana ndi madzi. Kugwiritsa ntchito HPMC mumatope owuma kumatha kubweretsanso zotsatira zazikulu:
(1) Kupititsa patsogolo kagwiritsidwe ntchito ka ndalama
Mtondo wowuma uyenera kukhala ndi madzi abwino komanso ogwira ntchito kuti ukhale wosalala mukamagwiritsa ntchito ndikuyika. Monga thickener, HPMC akhoza bwino kusintha fluidity wa matope youma, kuti zikhale zosavuta ntchito pokonzekera ndi kumanga ndondomeko pambuyo kuwonjezera madzi. Kugwiritsa ntchito HPMC ndikofunikira makamaka ngati simenti ili yochepa.
(2) Kumamatira bwino
Mphamvu yomangirira ya matope owuma imakhudza mwachindunji khalidwe la zomangamanga ndi kukhazikika kwa nyumbayo. HPMC imatha kupititsa patsogolo magwiridwe antchito amatope, kuwonetsetsa kuti imamatira molimba pamagawo osiyanasiyana omanga, ndikuletsa kugwa ndi kugwa.
(3) Limbikitsani kusunga madzi
Kusunga madzi ndi chinthu chofunikira kwambiri chomwe chimakhudza ubwino wa matope owuma. HPMC imayang'anira kutentha kwa madzi ndikuchedwetsa kuchuluka kwa madzi a nthunzi, kotero kuti matope amatha kusunga chinyezi choyenera panthawi yomanga ndikupewa kusokoneza ntchito yomanga chifukwa cha kuyanika kwambiri.
3. Zotsatira za HPMC pa zokutira
Kupaka ndi chinthu chofunikira kwambiri pakukongoletsa komanga, ndipo mawonekedwe ake ndi ntchito yomanga zimakhudza kwambiri kukongoletsa komaliza. Monga thickener wamba ndi stabilizer, HPMC chimagwiritsidwa ntchito zokutira, makamaka mbali zotsatirazi:
(1) Kupititsa patsogolo rheology ya zokutira
The thickening katundu wa HPMC akhoza kusintha rheology utoto, kulamulira mamasukidwe akayendedwe utoto, kupanga utoto kwambiri ngakhale pamene ntchito, ndi kupewa kuyenda kapena kudontha mofulumira kwambiri. Izi ndizofunikira makamaka ndi utoto wapakhoma kuti zitsimikizire kuti utotowo umagawidwa mofanana ndikuphimba malo onse.
(2) Kupititsa patsogolo kasungidwe ka madzi ndi kutsetsereka
HPMC imatha kukonza kusungidwa kwamadzi kwa zokutira ndikuchedwetsa kutuluka kwa madzi, potero kuwongolera kutsetsereka kwa zokutira, kupangitsa kuti zokutira zikhale zosavuta kugwira ntchito panthawi yomanga komanso kupenta kumakhala bwino. Kuonjezera apo, kusungidwa bwino kwa madzi kumalepheretsa utoto kusweka pamene uyanika.
(3) Limbikitsani kukana kwa nyengo ndi kuvala kukana kwa zokutira
Mtengo wa HPMC imathanso kuwongolera kukana kwa UV ndi kukana kwanyengo kwa zokutira, kuti zitha kupitilizabe kugwira ntchito kwake popanda kusintha kwakukulu mukakumana ndi chilengedwe chakunja kwa nthawi yayitali, makamaka ikakumana ndi kuwala kwa dzuwa, mvula ndi mchenga. Nthawi yomweyo, HPMC imathanso kukulitsa kukana kwa zokutira ndikuwongolera kulimba kwa malo omanga.
4. Mmene HPMC pa zipangizo gypsum
Gypsum ndi chinthu china chomangira chomwe chimagwiritsidwa ntchito kwambiri ndipo chimagwiritsidwa ntchito kwambiri pokongoletsa khoma lamkati, padenga ndi pansi. Kugwiritsiridwa ntchito kwa HPMC muzinthu za gypsum kumawonekera makamaka muzinthu izi:
(1) Kuwongola ndalama
HPMC ikhoza kusintha bwino madzi a gypsum slurry, kulola kuti gypsum ifalikire mofanana pamtunda, kuchepetsa thovu ndi kuyanika kosiyana.
(2) Limbikitsani kumamatira
Kumamatira kwa pulasitala ndikofunika kwambiri kuti ntchitoyo ikhale yabwino komanso yolimba. Monga kulimbikitsa wothandizira, HPMC imatha kuwongolera kumamatira pakati pa gypsum ndi zinthu zoyambira ndikuchepetsa kukhetsa komwe kumachitika chifukwa chosagwirizana.
(3) Kuchedwetsa nthawi ya condensation
HPMC imatha kuchedwetsa nthawi yoyika gypsum ndikuletsa gypsum kuti isaumike mwachangu pakumanga. Makamaka pomanga madera akuluakulu, imatha kugula nthawi yambiri yogwirira ntchito kwa ogwira ntchito yomanga ndikuwonetsetsa kuti zokutira zofananira ndi zomangamanga.
5. Kugwiritsa ntchito HPMC muzinthu zina zomangira
Kuphatikiza pa matope a simenti, matope owuma, zokutira ndi gypsum, kugwiritsa ntchito HPMC muzinthu zina zomangira kwalandiranso chidwi chofala. Mwachitsanzo, m'minda ya kunja kwa khoma kutchinjiriza zipangizo, zomatira matope, zomatira matailosi, etc., HPMC ndi chowonjezera zofunika kuti akhoza kusintha adhesion, fluidity ndi kasungidwe madzi a zipangizo, potero kuwongolera wonse yomanga kwenikweni.
Kugwiritsiridwa ntchito kwa HPMC muzomangamanga kumakhala ndi zotsatira zambiri ndipo kumatha kupititsa patsogolo magwiridwe antchito a zida zomangira, makamaka pazida zomangira wamba monga matope a simenti, matope owuma, zokutira ndi gypsum. Posintha kuchuluka ndi mtundu wa HPMC wowonjezeredwa, kugwirira ntchito, kumamatira, kukana ming'alu ndi kulimba kwa zida zomangira zosiyanasiyana zitha kukulitsidwa, potero kumapangitsa kuti ntchito yomangayo ikhale yabwino komanso yabwino. Chifukwa chake, HPMC mosakayikira ndichowonjezera chofunikira kwambiri pantchito yomanga ndipo ili ndi chiyembekezo chamsika komanso kuthekera kogwiritsa ntchito.
Nthawi yotumiza: Nov-11-2024