Hydroxyethyl Cellulose (HEC) ndi polima wamba wopanda ionic wosungunuka m'madzi wokhala ndi makulidwe abwino kwambiri, kusunga madzi, komanso kupanga mafilimu. Chifukwa chake, amagwiritsidwa ntchito kwambiri popaka utoto, utoto wa latex, ndi zomatira. Zomatira ndi mafakitale ena. Utoto wa latex ndi gawo lofunika kwambiri lazokongoletsera zamakono zomangira nyumba, ndipo kuwonjezera kwa HEC sikungangowonjezera kukhazikika kwa utoto wa latex, komanso kupititsa patsogolo ntchito yake yomanga.
1. Basic makhalidwe a hydroxyethyl mapadi
Hydroxyethyl cellulose ndi polima wosungunuka m'madzi womwe umapezeka posintha mankhwala pogwiritsa ntchito mapadi achilengedwe ngati zinthu zopangira. Zina zake zazikulu ndi izi:
makulidwe: HEC ali wabwino thickening tingati kuonjezera mamasukidwe akayendedwe a latex utoto ndi kupereka lalabala utoto kwambiri thixotropy ndi rheology, potero kupanga yunifolomu ndi wandiweyani ❖ kuyanika pomanga.
Kusungirako madzi: HEC imatha kuteteza madzi kuti asatuluke mwachangu mu utoto, motero amakulitsa nthawi yotsegulira utoto wa latex ndikuwongolera kuyanika ndi kupanga mafilimu a filimu ya utoto.
Kukhazikika: HEC ili ndi kukhazikika kwamphamvu kwamankhwala pamapangidwe a utoto wa latex, imatha kukana kusintha kwa pH, ndipo ilibe zotsutsana ndi zosakaniza zina mu utoto (monga pigments ndi fillers).
Kuyimilira: Posintha kuchuluka kwa HEC, kuchuluka kwa madzi ndi kukweza kwa utoto wa latex kumatha kuwongolera, ndipo mavuto monga kugwa ndi maburashi mufilimu ya utoto amatha kupewedwa.
Kulekerera kwa mchere: HEC ili ndi kulolerana kwina kwa ma electrolyte, kotero imatha kukhalabe ndi magwiridwe antchito abwino pamapangidwe okhala ndi mchere kapena ma electrolyte ena.
2. Kachitidwe ka hydroxyethyl cellulose mu utoto wa latex
Monga thickener ndi stabilizer, njira yaikulu ya hydroxyethyl cellulose mu utoto latex akhoza kusanthula mbali zotsatirazi:
(1) Kunenepa
HEC imasungunuka mofulumira m'madzi ndikupanga njira yomveka bwino, yowoneka bwino. Mwa kupanga zomangira za haidrojeni ndi mamolekyu amadzi, mamolekyu a HEC amawonekera ndikuwonjezera kukhuthala kwa yankho. Mwa kusintha kuchuluka kwa HEC, kukhuthala kwa utoto wa latex kumatha kuyendetsedwa bwino kuti mukwaniritse ntchito yomanga yabwino. Kukula kwa HEC kumagwirizananso ndi kulemera kwake kwa maselo. Nthawi zambiri, kulemera kwa mamolekyu kumapangitsa kuti thupi likhale lolimba kwambiri.
(2) Kukhazikika
Pali ma emulsion ambiri, inki ndi zodzaza mu utoto wa latex, ndipo kuyanjana pakati pazigawozi kumatha kuchitika, zomwe zimapangitsa delamination kapena mpweya wa utoto wa latex. Monga colloid yoteteza, HEC ikhoza kupanga dongosolo lokhazikika la sol mu gawo lamadzi kuti muteteze ma pigment ndi fillers kuti asakhazikike. Kuonjezera apo, HEC imatsutsana bwino ndi kusintha kwa kutentha ndi kumeta ubweya, kotero imatha kutsimikizira kukhazikika kwa utoto wa latex panthawi yosungirako ndi kumanga.
(3) Kupititsa patsogolo luso lomanga
Kugwiritsa ntchito utoto wa latex kumadalira kwambiri mawonekedwe ake. Mwa kukulitsa ndi kukonza ma rheology, HEC ikhoza kupititsa patsogolo ntchito yotsutsa-sag ya utoto wa latex, kulola kuti ifalikire mofanana pamtunda ndikupangitsa kuti ikhale yochepa. Panthawi imodzimodziyo, HEC ikhoza kuwonjezeranso nthawi yotsegulira utoto wa latex, kupatsa ogwira ntchito yomanga nthawi yowonjezereka kuti asinthe ndi kuchepetsa zizindikiro za burashi ndi zizindikiro zoyenda.
3. Momwe mungawonjezerere hydroxyethyl cellulose ku utoto wa latex
Kuti mugwiritse ntchito mokwanira mphamvu ya hydroxyethyl cellulose, njira yoyenera yowonjezera ndiyofunikira. Nthawi zambiri, kugwiritsa ntchito HEC mu utoto wa latex kumaphatikizapo izi:
(1) Kutha kutha
Popeza HEC imasungunuka pang'onopang'ono m'madzi ndipo imakhala yowonongeka, nthawi zambiri imalangizidwa kuti isungunuke HEC m'madzi kuti apange njira yothetsera yunifolomu ya colloidal musanagwiritse ntchito. Mukasungunuka, HEC iyenera kuwonjezeredwa pang'onopang'ono ndikugwedezeka mosalekeza kuti zisagwirizane. Kuwongolera kutentha kwa madzi panthawi ya kusungunuka ndikofunika kwambiri. Nthawi zambiri tikulimbikitsidwa kuti tisungunuke pa kutentha kwa 20-30 ° C kuti tipewe kutentha kwa madzi kochuluka komwe kumakhudza mapangidwe a maselo a HEC.
(2) Onjezani dongosolo
Popanga utoto wa latex, HEC nthawi zambiri imawonjezedwa panthawi ya pulping. Pokonzekera utoto wa latex, ma pigment ndi fillers amayamba kumwazikana mu gawo lamadzi kuti apange slurry, ndiyeno njira ya HEC colloidal imawonjezeredwa panthawi yobalalika kuti iwonetsetse kuti ikhoza kugawidwa mofanana mu dongosolo lonse. Nthawi yowonjezera HEC ndi mphamvu ya kusonkhezera idzakhudza mphamvu yake yowonjezereka, choncho iyenera kusinthidwa malinga ndi zofunikira za ndondomeko pakupanga kwenikweni.
(3) Kuwongolera mlingo
Kuchuluka kwa HEC kumakhudza mwachindunji ntchito ya utoto wa latex. Kawirikawiri, kuchuluka kwa HEC ndi 0.1% -0.5% ya kuchuluka kwa utoto wa latex. HEC yaying'ono kwambiri idzapangitsa kuti kukhuthala kukhale kopanda pake ndipo utoto wa latex ukhale wamadzimadzi, pamene HEC yochuluka kwambiri idzapangitsa kuti mamasukidwe akayendedwe akhale apamwamba kwambiri, zomwe zimakhudza kugwira ntchito. Choncho, muzogwiritsira ntchito, mlingo wa HEC uyenera kusinthidwa moyenerera malinga ndi ndondomeko yeniyeni ndi zofunikira zomanga za utoto wa latex.
4. Zitsanzo zogwiritsira ntchito hydroxyethyl cellulose mu utoto wa latex
Pakupanga kwenikweni, HEC yakhala ikugwiritsidwa ntchito kwambiri mumitundu yosiyanasiyana ya utoto wa latex, monga:
Utoto wa latex wamkati wamkati: Kukhuthala ndi kusunga madzi kwa HEC kumathandizira kuwongolera kwambiri mawonekedwe ndi anti-sag a filimu ya utoto mkati mwa khoma la latex utoto, makamaka m'malo otentha kwambiri momwe imatha kukhalabe yogwira ntchito bwino.
Kunja kwa khoma la latex utoto: Kukhazikika ndi kukana kwa mchere kwa HEC kumathandizira kukonza nyengo komanso kukana kukalamba mu utoto wa latex wakunja ndikukulitsa moyo wautumiki wa filimu ya utoto.
Utoto wa latex wa anti-mildew: HEC imatha kumwaza anti-mildew agent mu utoto wa latex wa anti-mildew ndikusintha mawonekedwe ake mufilimu ya utoto, potero kumapangitsa kuti anti-mildew azitha.
Monga chowonjezera chabwino kwambiri cha utoto wa latex, hydroxyethyl cellulose imatha kupititsa patsogolo magwiridwe antchito a utoto wa latex kudzera pakukhuthala kwake, kusunga madzi, komanso kukhazikika kwake. Muzochita zogwira ntchito, kumvetsetsa bwino njira yowonjezeramo ndi mlingo wa HEC kungathandize kwambiri kumangidwe ndi kugwiritsa ntchito utoto wa latex.
Nthawi yotumiza: Oct-22-2024