Zovala zokhala ndi madzi zikukhala zofunika kwambiri pamsika wamakono wokutira chifukwa cha malo ochezeka ndi chilengedwe komanso mpweya wochepa wa volatile organic compound (VOC). Komabe, poyerekeza ndi zokutira zachikhalidwe zosungunulira, zokutira zokhala ndi madzi nthawi zambiri zimakumana ndi zovuta pakupanga filimu ndi kumamatira. Kuti athane ndi zovuta izi, zowonjezera zina zogwira ntchito nthawi zambiri zimawonjezeredwa pakupanga. Hydroxyethyl cellulose (HEC) ndi imodzi mwazowonjezera zomwe zimagwiritsidwa ntchito kwambiri komanso zowonjezera, zomwe zimagwira ntchito yofunika kwambiri pakuwongolera kupanga mafilimu ndi kumamatira kwa zokutira zamadzi.
1. Basic katundu wa hydroxyethyl cellulose (HEC)
HEC ndi polima yosungunuka m'madzi yopanda ionic yomwe imapezeka mwa kusintha kwamankhwala a cellulose achilengedwe. Mapangidwe ake a maselo ali ndi magulu ambiri a hydroxyethyl, omwe amachititsa kuti azikhala ndi madzi abwino osungunuka komanso kupanga mafilimu. Makhalidwe akuluakulu a HEC ndi awa:
Kukula kwamphamvu: HEC imatha kukulitsa kukhuthala kwa zokutira zam'madzi, kuwapatsa rheology yabwino komanso kukhazikika pakupaka.
Katundu wopanga mafilimu: HEC imatha kupanga filimu yofananira panthawi yowumitsa zokutira, kuwongolera mawonekedwe akuthupi.
Kugwirizana: HEC imagwirizana bwino ndi mitundu yosiyanasiyana ya ma resin opangidwa ndi madzi ndi ma pigment, ndipo samakonda kusakhazikika kwa formula kapena kusanja.
2. Njira ya HEC pakupititsa patsogolo mafilimu opanga mafilimu mu zokutira zokhala ndi madzi
HEC ikhoza kupititsa patsogolo kwambiri mapangidwe opanga mafilimu mu zokutira zokhala ndi madzi, makamaka chifukwa cha mawonekedwe ake apadera a maselo ndi thupi ndi mankhwala.
Kulumikizana kwapang'onopang'ono kwa maunyolo a molekyulu: Unyolo wa ma molekyulu a HEC ndiatali komanso osinthika. Pa kuyanika kwa ❖ kuyanika, maunyolo a maselowa amatha kugwirizanitsa wina ndi mzake kuti apange maukonde ogwirizanitsa thupi, kuwonjezera mphamvu zamakina ndi kusinthasintha kwa zokutira.
Kuwongolera kwachinyezi: HEC imakhala ndi madzi abwino osungira madzi ndipo imatha kumasula pang'onopang'ono chinyezi panthawi ya kuyanika kwa chophimba, kukulitsa nthawi yopangira mafilimu, kulola kuti chophimbacho chipangidwe mofanana, ndi kuchepetsa kusweka ndi kuchepa chifukwa cha kuyanika mofulumira kwambiri.
Kuwongolera kupsinjika kwapamtunda: HEC imatha kuchepetsa kugwedezeka kwamadzi kwamadzi, kulimbikitsa kunyowetsa ndi kufalikira kwa zokutira pamwamba pa gawo lapansi, ndikuwongolera kufananiza ndi kusalala kwa zokutira.
3. Njira ya HEC pakulimbikitsa kumamatira mu zokutira zamadzi
HEC imathanso kuwongolera kwambiri kumamatira kwa zokutira zokhala ndi madzi, zomwe zimawonetsedwa makamaka m'magawo awa:
Kupititsa patsogolo mawonekedwe: Kugawidwa kwa yunifolomu kwa HEC mu zokutira kungapangitse malo olumikizana pakati pa zokutira ndi gawo lapansi ndikuwonjezera mphamvu yolumikizirana. Unyolo wake wa mamolekyulu amatha kulumikizana ndi tinthu tating'onoting'ono tating'onoting'ono tating'ono tating'ono tating'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono kuti tigwirizane bwino.
Kugwirizana kwa Chemical: HEC ndi polima yopanda ionic yogwirizana bwino ndi mankhwala osiyanasiyana (monga zitsulo, matabwa, pulasitiki, ndi zina zotero), ndipo sizosavuta kuyambitsa zotsatira za mankhwala kapena zovuta zogwirizana ndi nkhope, potero zimathandizira kumamatira.
Plasticizing effect: HEC imatha kuchita nawo gawo lina la pulasitiki pakuyanika ❖ kuyanika, kupangitsa kuti ❖ kuyanika kusinthasintha, kuti athe kusinthana ndi mapindikidwe ang'onoang'ono komanso kukulitsa matenthedwe ndi kupindika kwa gawo lapansi, ndikuchepetsa kupukuta ndi kusweka. wa zokutira.
4. Zitsanzo zogwiritsira ntchito ndi zotsatira za HEC
Muzochita zothandiza, HEC imagwiritsidwa ntchito kwambiri mumitundu yosiyanasiyana yopangira madzi opangira madzi, monga madzi opangira madzi, matabwa opangidwa ndi madzi, madzi opangira mafakitale, etc. Powonjezera ndalama zoyenera za HEC, zomangamanga ntchito ya zokutira ndi khalidwe la filimu ❖ kuyanika komaliza akhoza bwino kwambiri.
Zopaka zomangamanga zokhala ndi madzi: Mu utoto wopangidwa ndi madzi ndi utoto wakunja wapakhoma, kuwonjezera HEC kumatha kupititsa patsogolo magwiridwe antchito a zokutira ndi kutsuka, kupangitsa kuti zokutira zikhale zosavuta kugwiritsa ntchito komanso filimu yokutira kukhala yofananira komanso yosalala. Panthawi imodzimodziyo, kusungirako madzi kwa HEC kungathenso kuteteza ming'alu ya filimu yophimba chifukwa cha kuyanika mofulumira.
Utoto wa matabwa opangidwa ndi madzi: Mu utoto wopangidwa ndi matabwa opangidwa ndi madzi, kukhuthala kwa HEC ndi kupanga mafilimu kumathandiza kuti filimuyi ikhale yowonekera komanso yosalala, zomwe zimapangitsa kuti matabwa apangidwe kukhala okongola komanso achilengedwe. Kuphatikiza apo, HEC imatha kupititsa patsogolo kukana kwamadzi ndi kukana kwamankhwala kwa filimu yokutira ndikuwongolera chitetezo chamitengo.
Madzi opangira mafakitale opangidwa ndi madzi: Muzitsulo zazitsulo zokhala ndi madzi ndi zowonongeka zowonongeka, zowonjezera zowonjezera za HEC zimalola kuti filimu yophimba igwirizane bwino ndi chitsulo pamwamba pazitsulo, kupititsa patsogolo ntchito zotsutsana ndi zowonongeka ndi moyo wautumiki.
Monga chowonjezera chofunikira chogwira ntchito, hydroxyethyl cellulose (HEC) imathandizira kwambiri ntchito yonse ya zokutira mu zokutira zokhala ndi madzi powonjezera mawonekedwe opangira mafilimu ndi kumamatira. Kukhuthala kwake, kusungirako madzi, kupanga mafilimu komanso kukulitsa mawonekedwe ake kumathandizira kuti zokutira zokhala ndi madzi zizigwira ntchito bwino pamachitidwe osiyanasiyana ogwiritsira ntchito, motero zimakwaniritsa kufunikira kwa msika kwa zokutira zogwira ntchito kwambiri, zoteteza chilengedwe. M'tsogolomu, ndikusintha kosalekeza kwa chitetezo cha chilengedwe ndi zofunikira zogwirira ntchito, chiyembekezo chogwiritsa ntchito HEC mu zokutira zokhala ndi madzi chidzakhala chokulirapo.
Nthawi yotumiza: Jul-12-2024