Gypsum joint compound, yomwe imadziwikanso kuti drywall mud kapena kungophatikizana, ndi zinthu zomangira zomwe zimagwiritsidwa ntchito pomanga ndi kukonza zowuma. Amapangidwa makamaka ndi ufa wa gypsum, mchere wofewa wa sulfate womwe umasakanizidwa ndi madzi kuti upange phala. Phala limeneli limagwiritsidwa ntchito ku seams, ngodya, ndi mipata pakati pa mapanelo owuma kuti apange malo osalala, opanda msoko.
Hydroxypropyl methylcellulose (HPMC) ndi efa ya cellulose yomwe nthawi zambiri imawonjezeredwa ku pulasitala yolumikizana pazifukwa zosiyanasiyana. HPMC imachokera ku cellulose, polima wachilengedwe wopezeka m'makoma a cellulose. Nazi zina zofunika pakugwiritsa ntchito HPMC mu pulasitala olowa pawiri:
Kusunga Madzi: HPMC imadziwika chifukwa cha zinthu zake zabwino zosungira madzi. Mukathiridwa pa pulasitala, zimathandiza kuti chisakanizocho chisawume msanga. Nthawi yowonjezereka yogwira ntchito imapangitsa kuti ikhale yosavuta kugwiritsa ntchito ndikumaliza zinthu zomwe zimagwirizanitsa.
Kupititsa patsogolo kusinthika: Kuphatikizidwa kwa HPMC kumawonjezera kusinthika kwa gulu lolumikizana. Amapereka kusinthasintha kosalala, kumapangitsa kuti ikhale yosavuta kugwiritsa ntchito ndikuyika pamalo owuma. Izi ndizofunikira kwambiri kuti tipeze zotsatira zowoneka ngati akatswiri.
Kumamatira: HPMC imathandiza olowa pawiri kutsatira drywall pamwamba. Zimathandizira pawiri kumamatira mwamphamvu ku seams ndi zolumikizira, kuonetsetsa kuti mgwirizano wamphamvu komanso wokhalitsa zinthu zikauma.
Chepetsani kuchepa: Zida za Gypsum zimacheperachepera zikauma. Kuphatikiza kwa HPMC kumathandizira kuchepetsa kuchepa komanso kuchepetsa mwayi wa ming'alu yowonekera pamtunda womalizidwa. Izi ndizofunikira kuti mupeze zotsatira zabwino komanso zokhalitsa.
Air Entraining Agent: HPMC imagwiranso ntchito ngati wothandizira mpweya. Izi zikutanthauza kuti zimathandiza kuphatikizira tinthu tating'ono tating'onoting'ono mumsoko, kuwongolera magwiridwe ake onse komanso kulimba.
Consistency Control: HPMC imapereka chiwongolero chokulirapo pa kusasinthika kwa gulu lolumikizana. Izi zimathandizira kukwaniritsa kapangidwe kake ndi makulidwe omwe amafunidwa panthawi yogwiritsira ntchito.
Ndikofunika kuzindikira kuti mapangidwe enieni a zida za gypsum akhoza kusiyana kuchokera kwa opanga ndi opanga, ndipo magiredi osiyanasiyana a HPMC angagwiritsidwe ntchito kutengera zomwe mukufuna pazomaliza. Kuonjezera apo, zowonjezera zina monga thickeners, binders ndi retarders zikhoza kuphatikizidwa muzopangidwe kuti zipititse patsogolo ntchito.
Hydroxypropyl methylcellulose (HPMC) cellulose ether imagwira ntchito yofunika kwambiri pakuwongolera magwiridwe antchito, kumamatira komanso magwiridwe antchito onse amitundu yolumikizana ya gypsum yomwe imagwiritsidwa ntchito pomanga ndi kukonza khoma. Makhalidwe ake osunthika amathandizira kumaliza bwino komanso kokhazikika pamawonekedwe a drywall.
Nthawi yotumiza: Jan-29-2024