Pali mgwirizano wina pakati pa ufa wa ufa wa putty powder ndi HPMC (hydroxypropyl methylcellulose), koma ntchito ndi zotsatira za awiriwa ndi zosiyana.
1. Mapangidwe ndi mawonekedwe a ufa wa putty powder
Putty ufa ndi zinthu zomangira zomwe zimagwiritsidwa ntchito pokweza khoma, kukonzanso ndi kukongoletsa. Zigawo zazikuluzikulu zimaphatikizapo zipangizo zoyambira (monga simenti, gypsum), zodzaza (monga calcium carbonate) ndi zowonjezera (monga cellulose ether, wosungira madzi, etc.). Ubwino wa ufa wa putty ufa makamaka umatanthawuza kufinya, kufanana komanso kumva kwa tinthu tating'ono panthawi yomanga. Ubwino wa ufawu umakhudzidwa ndi izi:
Kukula kwa tinthu ting'onoting'ono: Calcium carbonate imagwiritsidwa ntchito ngati chodzaza chachikulu. Kapangidwe ka calcium carbonate particles, kumapangitsanso kuti ufa wa putty ufa ukhale wowoneka bwino, komanso umakhala wosalala komanso wosalala wa khoma pambuyo pa ntchito.
Mtundu wa zinthu zoyambira: Mwachitsanzo, simenti-based putty powder ndi gypsum-based putty powder adzakhala ndi kumverera ndi makhalidwe osiyanasiyana chifukwa cha zipangizo zosiyanasiyana zomwe zimagwiritsidwa ntchito. Tinthu ting'onoting'ono ta ufa wopangidwa ndi simenti ukhoza kukhala wokhuthala, pomwe wa gypsum-based putty powder ukhoza kukhala wabwino kwambiri.
Ukadaulo wokonza: Popanga ufa wa putty, kuchuluka kwa kugaya ndi kufanana kwa chilinganizo kumakhudzanso mtundu wa ufa. Ukadaulo wabwino wokonza ukhoza kupanga ufa wofewa komanso wofanana.
2. Udindo wa HPMC mu putty powder
HPMC, yomwe ndi hydroxypropyl methylcellulose, ndi yowonjezera yowonjezera mu putty powder. Ndi polima yosungunuka m'madzi yomwe imagwira ntchito kwambiri pakukulitsa, kusunga madzi ndikuwongolera ntchito yomanga. HPMC palokha sichikhudza mwachindunji ubwino wa tinthu (ie ufa wa ufa) wa putty powder, koma umakhala ndi kusintha kwakukulu pa ntchito yomanga ya putty powder:
Mphamvu yosungira madzi: Ntchito yofunikira ya HPMC ndi kusunga madzi, zomwe zingachedwetse kutuluka kwa madzi mu putty powder panthawi yomanga ndikuletsa kuti ufa wa putty usamawume msanga panthawi yomanga khoma. Izi zimakhala ndi zotsatira zabwino pamakoma ndi kumamatira, makamaka kutentha kwambiri ndi malo owuma, kusunga madzi ndikofunikira kwambiri.
Kukula kwamphamvu: HPMC imatha kukulitsa kukhuthala kwa ufa wa putty, kuti ukhale wokhazikika komanso wosavuta kukwapula pambuyo poyambitsa. Izi zimathandizira kuwongolera kuchuluka kwa ufa wa putty pakumanga, kumachepetsa kuwuluka ndi kugwa kwa ufa, ndipo kumatha kukulitsa mphamvu yolumikizirana, potero kumapangitsanso kumva bwino pakumanga.
Limbikitsani ntchito yomanga: Kukhalapo kwa HPMC kumatha kupangitsa kuti ufa wa putty ukhale wosavuta kugwira ntchito pakumanga, kumva bwino, ndikuwonetsa mawonekedwe ofananirako komanso osakhwima mukawongolera. Ngakhale HPMC sisintha ubwino wa thupi la putty powder particles, imapangitsa kuti ntchito yonse ikhale yogwira ntchito ndipo imapangitsa kuti phokoso likhale losakhwima likagwiritsidwa ntchito.
3. Zotsatira zosalunjika za HPMC pa ubwino wa putty powder
Ngakhale HPMC sisintha mwachindunji kukula kwa tinthu kapena kupukuta kwa thupi la putty powder, imapangitsa kuti mapangidwe a ufa wa putty apitirire kusungirako madzi, kukhuthala, kutsekemera ndi zina, kupangitsa kuti putty ufa ukhale wosavuta komanso wosavuta kugwira ntchito ukagwiritsidwa ntchito. Panthawi yomanga, ufa wa putty wokhala ndi HPMC umakhala wosavuta kugwiritsa ntchito mosadukiza, kuchepetsa zokopa ndi kusagwirizana, zomwe zimapangitsa ogwiritsa ntchito kumva kuti ufawo ndi wosakhwima.
Kusungidwa kwa madzi kwa HPMC kungalepheretse ming'alu ya shrinkage mu ufa wa putty panthawi yowumitsa khoma, zomwe zimakhalanso ndi zotsatira zabwino pakuwongolera kusalala komanso kusalala kwa khoma. Choncho, kuchokera pakuwona zotsatira zomaliza za khoma, HPMC ili ndi zotsatira zina zosalunjika pa fineness ya putty powder.
4. Ubale pakati pa mlingo wa HPMC ndi khalidwe la ufa
Mlingo wa HPMC uyeneranso kuyang'aniridwa bwino. Kawirikawiri, mlingo wa HPMC mu putty powder ndi wochepa, ndipo kugwiritsa ntchito mopitirira muyeso kumabweretsa mavuto otsatirawa:
Kuchuluka kwambiri: Ngati mlingo wa HPMC uli wochuluka, ufa wa putty ukhoza kukhala wowoneka bwino kwambiri, zomwe zimapangitsa kuti zikhale zovuta kugwedeza, ndipo zingayambitsenso mavuto monga kutayika kwa ufa ndi kumata pamwamba. Sikophweka kugwiritsa ntchito lathyathyathya panthawi yomanga, zomwe zidzakhudza zotsatira za khoma lomaliza ndikupatsa anthu kumverera kwa ufa wovuta.
Wonjezerani nthawi yowumitsa: Mphamvu yosungira madzi ya HPMC idzachedwetsa nthawi yowuma ya putty powder. Ngati mlingowo ndi wochuluka, khoma silingawume kwa nthawi yaitali, zomwe sizingathandizenso kuti ntchito yomanga ipite patsogolo.
Choncho, mlingo wa HPMC uyenera kukhala wokwanira kuti ugwire ntchito yake kuti ukhale wabwino wa putty powder.
Ubwino wa putty ufa umatsimikiziridwa makamaka ndi kuwongolera kwa zinthu zake zoyambira ndi zodzaza, komanso kupanga ndi zinthu zina. Monga chowonjezera mu ufa wa putty, HPMC sichidziwikiratu mtundu wa ufa, koma imakhala ndi zotsatira zabwino pa fineness ya ufa wake pokonza kusungirako madzi, thickening ndi zomangamanga za putty powder. Kugwiritsa ntchito moyenera kwa HPMC kungapangitse ufa wa putty kuwonetsa kumva bwino komanso kugwiritsa ntchito bwino pakumanga, kuchepetsa zolakwika zomanga, motero kumapangitsa kuti khoma lonse likhale losalala komanso labwino kwambiri.
Nthawi yotumiza: Sep-30-2024