Pali zinthu zambiri zomwe zimakhudza kugwiritsa ntchito hydroxypropyl methylcellulose HPMC mu zipangizo zomangira, makamaka pulasitala yochokera ku gypsum, motere:
1 Kusunga madzi
Hydroxypropyl methylcellulose yomangira imaletsa kuyamwa kwa madzi mopitirira muyeso ndi substrate, ndipo gypsum ikakhazikika kwathunthu, madzi ayenera kusungidwa mu pulasitala momwe angathere. Khalidweli limatchedwa kusunga madzi ndipo limagwirizana mwachindunji ndi kukhuthala kwa yankho la hydroxypropyl methylcellulose lomwe limapangidwa mu stucco. Kukhuthala kwa yankho kukakhala kwakukulu, mphamvu yake yosungira madzi imakwera. Madzi akawonjezeka, mphamvu yosungira madzi imachepa. Izi zili choncho chifukwa madzi ochulukirapo amachepetsa njira ya hydroxypropyl methylcellulose yomangira, zomwe zimapangitsa kuti kukhuthala kuchepe.
2 zoletsa kugwa
Pulasitiki yokhala ndi mphamvu zoletsa kugwa imalola opakira kuti azipaka utoto wokhuthala popanda kugwa, komanso zikutanthauza kuti pulasitikiyo si thixotropic, yomwe ikanatsika pansi ikagwiritsidwa ntchito.
3 Kuchepetsa kukhuthala, kapangidwe kosavuta
Pulasitiki ya gypsum yokhala ndi kukhuthala kochepa komanso yosavuta kupanga ingapezeke powonjezera zinthu zosiyanasiyana za hydroxypropyl methylcellulose. Mukagwiritsa ntchito ma grade otsika-kukhuthala kwa hydroxypropyl methylcellulose yomanga, kuchuluka kwa kukhuthala kumachepa. Kapangidwe kake kamakhala kosavuta, koma mphamvu yosungira madzi ya hydroxypropyl methylcellulose yomanga ndi yofooka, ndipo kuchuluka kowonjezera kuyenera kuwonjezeredwa.
4 Kugwirizana kwa stucco
Pa matope ouma okwanira, ndi bwino kupanga matope onyowa ambiri, omwe angapezeke powonjezera thovu lamadzi ndi mpweya. Koma kuchuluka kwa thovu lamadzi ndi mpweya ndi kwakukulu kwambiri.
Nthawi yotumizira: Epulo-20-2023