Gypsum ndi chinthu chomangamanga chofala chomwe chimagwiritsidwa ntchito ngati chokongoletsera cha khoma. Imadziwika chifukwa cha kukhazikika kwake, zolimba, ndi kutsutsana ndi moto. Komabe, ngakhale ali ndi mapindu ake, pulasitala amatha ming'alu pakapita nthawi, omwe amatha kusiya kukhulupirika kwake ndikusokoneza mawonekedwe ake. Pulani yapulanda imatha kuchitika pazifukwa zosiyanasiyana, kuphatikizapo zinthu zachilengedwe, zomanga zoipa, ndi zinthu zabwino kwambiri. M'zaka zaposachedwa, hydroxypropyl methylcellulose (hpmc) zowonjezera zikatuluka monga yankho lothana ndi vuto la pulasitala. Nkhaniyi ikufotokoza kufunika kwa zowonjezera za HPMC zowonjezera poletsa ming'alu ya pulasitala ndi momwe amagwirira ntchito.
Kodi owonjezera a HPMC ndi amagwira ntchito bwanji?
Zowonjezera za HPMC zimagwiritsidwa ntchito pomanga malonda ngati othandizira ophatikiza ndi mafayilo osinthika pamapulogalamu ambiri, kuphatikizapo zopota. Kuchokera ku cellulose, amasungunuka m'madzi ozizira komanso otentha motero angagwiritsidwe ntchito m'malo omangamanga. Akasakanizidwa ndi madzi, hpmc ufa umapanga chinthu chofanana ndi gel osakaniza ma sotucco kapena kugwiritsidwa ntchito ngati makoma okutira pamwamba pa mpanda wopaka. Zojambulajambula ngati gelc zimawalola kufalikira mobwerezabwereza, kupewa kusinthika mwamphamvu kwa chinyezi komanso kuchepetsa chiopsezo chosweka.
Ubwino wofunikira kwambiri wa zowonjezera za HPMC ndikutha kuwongolera kuchuluka kwa gypsum, kulola nthawi yabwino. Izi zowonjezera zimapanga chotchinga chomwe chimachepetsa kutulutsidwa kwamadzi, potero kuchepetsa mwayi wowuma msanga komanso kusokoneza kotsatira. Kuphatikiza apo, HPMC imatha kufalitsa ma thovu a mpweya mu gypsum osakaniza, zomwe zimathandizira kukonza kugwirira ntchito ndikupangitsa kuti zisagwiritse ntchito.
Pewani ming'alu yakale pogwiritsa ntchito HPMC yowonjezera
Kuyanika shrinkage
Chimodzi mwazomwe zimayambitsa zoyambitsa pulasitala likuuma shrinkage pamwamba. Izi zimachitika pamene Stucco ikauma ndikumachepetsa, ndikupanga mikangano yomwe imayambitsa kusokonekera. Zowonjezera za HPMC zingathandize kuchepetsa kuyanika shrinkage pochepetsa kuchuluka komwe madzi amatuluka kuchokera ku gypsum osakaniza. Pamene plaster osakaniza ali ndi chinyezi chosasunthika, kuchuluka kwa zouma ndi yunifolomu, kuchepetsa chiopsezo cha kusweka ndi shrinkage.
Kusakanikirana kolakwika
Nthawi zambiri, pulasitala yosakanikirana bwino imabweretsa mfundo zofooka zomwe zimatha kuthyoleka mosavuta. Kugwiritsa ntchito zowonjezera za HPMC ku gypsum kusakanikirana kungathandize kukonza zomangamanga ndikupanga njira yomangayi. Izi zowonjezerazi zimafalikira kwambiri pulasitala, zomwe zimapangitsa kuti zikhale zofunikira komanso kuchepetsa chiopsezo chosweka.
Kusasinthasintha
Kutentha kwambiri kumatha kuyambitsa stucco kuti ichuluke ndi mgwirizano, kupanga mikangano yomwe ingayambitse ming'alu. Kugwiritsa ntchito zowonjezera zowonjezera za HPMC kumachepetsa kuchuluka kwa madzi osinthika, pomaliza kuchepetsa chiwongola dzanja ndikuchepetsa chiopsezo chowonjezereka kwa mafuta. Gulister akamatsikira, imachepetsa mphamvu zomwe zingatheke m'malo ochulukitsa, ndikupanga mikangano yomwe ingayambitse ming'alu.
Nthawi yosakwanira yolunga
Mwinanso chinthu chofunikira kwambiri ku Plaster kusokonekera sikokwanira nthawi. Zowonjezera za HPMC zimachepetsa kutulutsa kwamadzi kuchokera ku gypsum osakaniza, potero pofika nthawi yokhazikika. Nthawi yayitali yothira nthawi yambiri imasinthasintha kwa Stucco ndikuchepetsa mawonekedwe a mawanga ofooka omwe angang'ambe. Kuphatikiza apo, ma hpmc owonjezera amathandizira kuthana ndi nyengo yovuta kwambiri yomwe imayambitsa ming'alu m'malo owonekera.
Pomaliza
Kusanja kwa Stucco kuli kofala mu makampani omanga ndipo kumatha kubweretsa kukonza zokwera mtengo komanso zolakwika. Ngakhale pali zinthu zambiri zomwe zingayambitse ming'alu mu pulasitala, pogwiritsa ntchito zowonjezera za HPMC ndi njira yothetsera vuto lopewa ming'alu. Ntchito ya hpmc zowonjezera ndikupanga chotchinga chomwe chimalepheretsa kusinthika kwamphamvu ndikuchepetsa kuyanika ndikumakulitsa ndi kuwonjezeka kwa mafuta. Izi zowonjezerazi zimasinthanso kugwirira ntchito, zomwe zimayambitsa mphamvu zosasintha komanso zabwino kwambiri. Powonjezera ma hpmc owonjezera kusiyanasiyana, omangawo amatha kuonetsetsa kuti ali wolimba.
Post Nthawi: Sep-26-2023