Ufa wa putty umagwiritsidwa ntchito makamaka pokonza makoma panthawi yomanga. Komabe, ufa wa putty wachikhalidwe umasungunuka mosavuta ndi kufewa ukayikidwa m'madzi, zomwe zimakhudza ubwino wa nyumbayo komanso nthawi yogwirira ntchito. Hydroxypropyl methylcellulose (HPMC), monga chowonjezera chofunikira, imatha kusintha kwambiri kukana kwa ufa wa putty.
1. Kapangidwe ka mankhwala ndi ntchito zoyambira za HPMC
Hydroxypropyl methylcellulose (HPMC) ndi ether ya cellulose yosakhala ionic yokhala ndi ntchito zosiyanasiyana monga kukhuthala, kupanga filimu, kukhazikika, ndi kunyowetsa. Imagwiritsidwa ntchito kwambiri pakupanga zinthu, mankhwala, chakudya ndi zina. Kapangidwe ka mamolekyu a HPMC kali ndi magulu a hydrophilic hydroxyl (–OH) ndi magulu a hydrophobic hydrocarbon (–CH3, –CH2–), zomwe zimapangitsa kuti madzi asungunuke bwino komanso akhale olimba. Makhalidwe amenewa amathandiza HPMC kupanga mayankho okhazikika a colloidal m'madzi ndikupanga kapangidwe kolimba ka netiweki panthawi yokonza, potero kukonza mawonekedwe enieni a zinthuzo.
2. Njira yowonjezerera kukana madzi
2.1. Kukhuthala kwa mphamvu
HPMC imatha kuonjezera kwambiri kukhuthala kwa slurry ya putty powder, zomwe zimathandiza kuti slurry ipange njira yokhazikika yoyimitsira m'madzi. Kumbali imodzi, kukhuthala kumeneku kumawongolera magwiridwe antchito a slurry ndikuchepetsa vuto la delamination ndi kutuluka magazi; kumbali ina, popanga slurry yokhuthala, HPMC imachepetsa kuchuluka kwa kulowa kwa mamolekyu amadzi, motero kumawonjezera mphamvu ya putty powder. Kukana madzi pambuyo pochira.
2.2. Kapangidwe ka filimu
Pa nthawi yokonza ufa wa putty, HPMC imapanga filimu yolimba pakati pa simenti, madzi ndi zosakaniza zina. Nembanemba iyi ili ndi mphamvu yochepa yotumizira nthunzi ya madzi ndipo imatha kuletsa kulowa kwa chinyezi. Filimu yopangidwa ndi HPMC ingathandizenso kulimba kwa makina ndi kukana kukalamba kwa zinthuzo, zomwe zimapangitsa kuti ufa wa putty usavutike ndi madzi.
2.3. Kulimbitsa kukana ming'alu
Mwa kukonza mphamvu ya ufa wa putty kuti ukhale wosalala komanso wochepa, HPMC ingachepetse bwino chiopsezo cha ming'alu yomwe imabwera chifukwa cha ming'alu youma komanso kusintha kwa kutentha. Kuchepetsa ming'alu kudzathandizanso kukonza kukana kwa ufa wa putty m'madzi, chifukwa ming'alu idzakhala njira yayikulu yolowera madzi.
2.4. Kulamulira momwe madzi amayendera
HPMC imatha kuchedwetsa kuchuluka kwa madzi m'simenti, zomwe zimathandiza kuti ufa wa putty ukhale ndi nthawi yayitali yodzichiritsa yokha komanso kukhuthala panthawi yolimba. Kuchepa kwa madzi pang'onopang'ono kumathandiza kupanga kapangidwe kakang'ono, motero kuchepetsa ma porosity a ufa wa putty ndikuwonjezera magwiridwe antchito osalowa madzi a zinthuzo.
3. Kugwiritsa ntchito HPMC mu ufa wa putty
3.1. Kuwongolera magwiridwe antchito a zomangamanga
HPMC imakonza bwino mphamvu ya rheological ya putty slurry, zomwe zimapangitsa kuti ogwira ntchito yomanga nyumba azitha kugwira ntchito zokanda ndi kusalaza. Chifukwa cha kukhuthala kwake bwino komanso kusunga madzi, ufa wa putty ukhoza kukhala ndi chinyezi choyenera ukagwiritsidwa ntchito, zomwe zimachepetsa ming'alu youma komanso kukonza bwino ntchito yomanga.
3.2. Kuonjezera mphamvu za makina a zinthu zomalizidwa
Ufa wa putty wowonjezeredwa ndi HPMC uli ndi mphamvu zambiri zamakaniko komanso umamatira ukatha kuuma, zomwe zimachepetsa kuthekera kwa ming'alu ndi kusweka. Izi zimathandizira kwambiri kukongola ndi kulimba kwa nyumbayo.
3.3. Kulimbitsa kukana kwa madzi kwa chophimba chomaliza
Mayeso akusonyeza kuti mphamvu ya ufa wa putty wowonjezeredwa ndi HPMC imachepa pang'ono mutanyowa m'madzi, ndipo imasonyeza kukana bwino kwa hydrolysis ndi kukhazikika. Izi zimapangitsa ufa wa putty wogwiritsa ntchito HPMC kukhala woyenera kwambiri pazofunikira zomangira m'malo ozizira.
4. Njira zodzitetezera pogwiritsa ntchito
Ngakhale kuti HPMC ili ndi mphamvu yofunikira pakukweza kukana kwa madzi kwa ufa wa putty, mfundo zotsatirazi ziyenera kukumbukiridwa pogwiritsira ntchito:
4.1. Sankhani mlingo moyenera
Mlingo wa HPMC uyenera kusinthidwa moyenera malinga ndi fomula ndi zofunikira pakupanga ufa wa putty. Kugwiritsa ntchito mopitirira muyeso kungapangitse kuti slurry ikhale yokhuthala kwambiri, zomwe zingakhudze ntchito yomanga; kugwiritsa ntchito kosakwanira sikungapangitse kuti ikhale yolimba komanso yopanga filimu.
4.2. Kugwirizana ndi zowonjezera zina
HPMC nthawi zambiri imagwiritsidwa ntchito limodzi ndi ma ether ena a cellulose, ufa wa latex, ma plasticizer ndi zina zowonjezera kuti zikwaniritse zotsatira zabwino kwambiri. Kusankha bwino ndi kufananiza zowonjezerazi kungathandize kuti ufa wa putty ugwire bwino ntchito.
4.3. Lamulirani kutentha ndi chinyezi cha malo ozungulira
Kapangidwe ka madzi ka HPMC kangakhudzidwe kakagwiritsidwa ntchito m'malo otentha kwambiri kapena chinyezi chochepa. Ntchito yomanga iyenera kuchitika m'malo otentha komanso chinyezi choyenera momwe zingathere, ndipo chisamaliro chiyenera kuperekedwa pakusunga chinyezi cha matope.
HPMC imawongolera bwino kukana madzi kwa ufa wa putty kudzera munjira zosiyanasiyana monga kukhuthala, kupanga filimu, kukonza kukana ming'alu ndikuwongolera momwe madzi amagwirira ntchito, zomwe zimapangitsa kuti ikhale yokhazikika komanso yolimba m'malo ozizira. Izi sizimangowonjezera ubwino ndi magwiridwe antchito a nyumbayo, komanso zimawonjezera moyo wautumiki wa nyumbayo. Mu ntchito zothandiza, kusankha moyenera ndi kugwiritsa ntchito HPMC ndi zowonjezera zina kungathandize kwambiri magwiridwe antchito a ufa wa putty ndikupeza zotsatira zabwino kwambiri zomangira.
Nthawi yotumizira: Juni-26-2024