Hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chogwiritsidwa ntchito kwambiri mumakampani omanga, makamaka popanga ma plaster. Gypsum plaster, yomwe imadziwikanso kuti plaster of Paris, ndi chinthu chodziwika bwino chomangira chomwe chimagwiritsidwa ntchito kuphimba makoma ndi denga. HPMC imagwira ntchito yofunika kwambiri pakukweza magwiridwe antchito ndi magwiridwe antchito a plaster ya gypsum.
HPMC ndi ether ya cellulose yosakhala ionic yomwe imapezeka kuchokera ku cellulose yachilengedwe ya polymer kudzera mu kusintha kwa mankhwala osiyanasiyana. Imapangidwa pochiza cellulose ndi propylene oxide ndi methyl chloride. Chotsatira chake ndi ufa woyera womwe umasungunuka m'madzi ndikupanga yankho lowonekera bwino la viscous.
Nazi zina mwa zinthu zofunika kwambiri pa HPMC pa pulasitala:
1. Kusunga madzi:
Chimodzi mwa ntchito zazikulu za HPMC mu gypsum ndi mphamvu yake yosunga madzi. Imathandiza kupewa kutaya chinyezi mwachangu panthawi yowuma, zomwe zimathandiza kuti pulasitala ikhale yowongoleredwa bwino komanso yofanana. Izi ndizofunikira kuti pulasitala ikhale yolimba komanso yokhazikika.
2. Kukonza njira yogwirira ntchito:
HPMC imathandizira kuti pulasitala wa gypsum ugwire ntchito bwino popereka nthawi yabwino yotseguka komanso kukana kutsetsereka. Izi zimapangitsa kuti zikhale zosavuta kuyika ndikuyika stucco pamwamba, zomwe zimapangitsa kuti ikhale yosalala komanso yofanana.
3. Kugwirizana ndi kugwirizana:
HPMC imathandiza kuti pulasitala ya gypsum imamatire ku zinthu zosiyanasiyana. Imathandiza kuti plasitala ikhale yolimba pakati pa stucco ndi pamwamba pake, zomwe zimapangitsa kuti ikhale yolimba komanso yolimba. Kuphatikiza apo, HPMC imathandizira kuti pulasitalayo ikhale yolimba, motero imawonjezera mphamvu ndikuchepetsa ming'alu.
4. Kukhuthala:
Mu mapangidwe a gypsum, HPMC imagwira ntchito ngati chokhuthala, zomwe zimakhudza kukhuthala kwa chisakanizo cha gypsum. Kukhuthala kumeneku ndikofunikira kwambiri kuti pakhale kukhazikika ndi kapangidwe kofunikira panthawi yogwiritsa ntchito. Zimathandizanso kupewa stucco kuti isagwedezeke kapena kugwa pamalo oyima.
5. Khazikitsani nthawi yolamulira:
Kulamulira nthawi yokhazikitsa pulasitala wa gypsum ndikofunikira kwambiri pa ntchito zomangamanga. HPMC imatha kusintha nthawi yokhazikitsa kuti ipereke kusinthasintha kokwanira kukwaniritsa zofunikira zinazake za polojekiti. Izi ndizofunikira makamaka pamapulojekiti akuluakulu omwe angafunike nthawi zosiyanasiyana zokhazikitsa.
6. Zotsatira pa porosity:
Kupezeka kwa HPMC kumakhudza ma porosity a gypsum. Pulasitiki yopangidwa bwino yokhala ndi HPMC imatha kuwonjezera kukana kulowa kwa madzi ndikuchepetsa ma porosity, motero kumawonjezera kulimba komanso kukana zinthu zachilengedwe.
7. Kugwirizana ndi zowonjezera zina:
HPMC imagwirizana ndi zowonjezera zina zosiyanasiyana zomwe zimagwiritsidwa ntchito popanga ma gypsum. Kusinthasintha kumeneku kumalola kuti zosakaniza za plaster zisinthidwe kuti zikwaniritse miyezo yeniyeni yogwirira ntchito komanso zofunikira pakugwiritsa ntchito.
8. Zinthu zofunika kuziganizira pa chilengedwe:
HPMC nthawi zambiri imaonedwa kuti ndi yotetezeka komanso yoteteza chilengedwe. Siimayambitsa poizoni ndipo siimatulutsa zinthu zoopsa panthawi yopaka pulasitala kapena itatha. Izi zikugwirizana ndi kugogomezera kwakukulu kwa njira zomangira zokhazikika komanso zosawononga chilengedwe.
Hydroxypropyl methylcellulose (HPMC) imagwira ntchito yofunika kwambiri pakukweza magwiridwe antchito a gypsum mu ntchito zomanga. Kusunga kwake madzi, kukonza magwiridwe antchito, kumamatira, kukhuthala, kuwongolera nthawi, momwe imagwirira ntchito, kuyanjana ndi zowonjezera zina komanso zinthu zina zomwe zimaganizira za chilengedwe zimapangitsa kuti ikhale yowonjezera yofunika kwambiri mu mapangidwe apamwamba a gypsum. Pamene njira zomangira zikupitilira kusintha, HPMC ikadali chinthu chofunikira kwambiri pakukweza magwiridwe antchito ndi kulimba kwa gypsum plaster m'mapulojekiti osiyanasiyana omanga ndi omanga.
Nthawi yotumizira: Januwale-22-2024