Utoto wa latex (womwe umadziwikanso kuti utoto wamadzi) ndi mtundu wa utoto wokhala ndi madzi ngati zosungunulira, zomwe zimagwiritsidwa ntchito kwambiri pokongoletsa ndi kuteteza makoma, denga ndi malo ena. Njira ya utoto wa latex nthawi zambiri imakhala ndi emulsion ya polima, pigment, filler, zowonjezera ndi zina. Mwa iwo,hydroxyethyl cellulose (HEC)ndi chokhuthala chofunikira ndipo chimagwiritsidwa ntchito kwambiri mu utoto wa latex. HEC sichingangowonjezera kukhuthala ndi kumveka kwa utoto, komanso kuwongolera magwiridwe antchito a filimu ya utoto.
1. Makhalidwe oyambira a HEC
HEC ndi polima yosungunuka m'madzi yosinthidwa kuchokera ku cellulose yokhala ndi makulidwe abwino, kuyimitsidwa komanso kupanga mafilimu. Unyolo wake wa mamolekyulu uli ndi magulu a hydroxyethyl, omwe amawapangitsa kuti asungunuke m'madzi ndikupanga yankho lamphamvu kwambiri. HEC ili ndi hydrophilicity yamphamvu, yomwe imathandiza kuti ikhale ndi gawo lokhazikitsira kuyimitsidwa, kusintha rheology ndi kupititsa patsogolo mafilimu mu utoto wa latex.
2. Kuyanjana pakati pa HEC ndi polymer emulsion
Chigawo chapakati cha utoto wa latex ndi polymer emulsion (monga acrylic acid kapena ethylene-vinyl acetate copolymer emulsion), yomwe imapanga mafupa akuluakulu a filimu ya utoto. Kuyanjana pakati pa AnxinCel®HEC ndi emulsion ya polima kumawonekera makamaka muzinthu izi:
Kukhazikika kwabwino: HEC, monga thickener, ikhoza kuonjezera kukhuthala kwa utoto wa latex ndikuthandizira kukhazikika kwa emulsion particles. Makamaka mu emulsions otsika ndende polima, Kuwonjezera HEC akhoza kuchepetsa sedimentation wa emulsion particles ndi kusintha kusunga bata wa utoto.
Rheological regulation: HEC imatha kusintha mawonekedwe a penti ya latex, kuti ikhale ndi ntchito yabwino yokutira pakumanga. Mwachitsanzo, panthawi yopenta, HEC imatha kukonza malo otsetsereka a utoto ndikupewa kudontha kapena kutsika kwa zokutira. Kuphatikiza apo, HEC imathanso kuwongolera kubwezeretsedwa kwa utoto ndikuwonjezera kufanana kwa filimu ya utoto.
Kukhathamiritsa kwa ntchito zokutira: Kuphatikizika kwa HEC kumatha kusintha kusinthasintha, glossiness ndi kukana kukanika kwa zokutira. Mamolekyu a HEC amatha kuyanjana ndi emulsion ya polima kuti apititse patsogolo mawonekedwe onse a filimu ya utoto, ndikupangitsa kuti ikhale yolimba komanso kuti ikhale yolimba.
3. Kuyanjana pakati pa HEC ndi ma pigment
Ma pigment mu utoto wa latex nthawi zambiri amakhala ndi inorganic pigments (monga titanium dioxide, mica powder, etc.) ndi organic pigments. Kuyanjana pakati pa HEC ndi ma pigment kumawonekera makamaka pazinthu izi:
Kubalalika kwa pigment: Kukhuthala kwa HEC kumawonjezera kukhuthala kwa utoto wa latex, womwe umatha kumwaza bwino tinthu tating'ono ta pigment ndikupewa kuphatikizika kwa pigment kapena mvula. Makamaka ena abwino pigment particles, ndi polima dongosolo HEC akhoza kukulunga padziko pigment kuteteza agglomeration wa pigment particles, potero kuwongolera kubalalitsidwa kwa pigment ndi yunifolomu wa utoto.
Mphamvu yomanga pakati pa pigment ndi filimu yokutira:HECmamolekyu amatha kutulutsa kutulutsa kwakuthupi kapena kuchitapo kanthu kwa mankhwala ndi pamwamba pa pigment, kukulitsa mphamvu yomangirira pakati pa pigment ndi filimu yokutira, ndikupewa zochitika za kukhetsa kwa pigment kapena kuzimiririka pamwamba pa filimu yokutira. Makamaka mu utoto wowoneka bwino wa latex, HEC imatha kusintha bwino kukana kwanyengo komanso kukana kwa UV kwa pigment ndikukulitsa moyo wautumiki wa zokutira.
4. Kuyanjana pakati pa HEC ndi fillers
Ma fillers ena (monga calcium carbonate, talcum powder, silicate minerals, etc.) nthawi zambiri amawonjezeredwa ku utoto wa latex kuti apititse patsogolo rheology ya utoto, kupititsa patsogolo mphamvu yobisala ya filimu yophimba ndikuwonjezera mtengo wa utoto. Kuyanjana pakati pa HEC ndi fillers kumawonekera m'magawo awa:
Kuyimitsidwa kwa zodzaza: HEC imatha kusunga zodzaza ndi utoto wa latex mumkhalidwe wobalalika yunifolomu kudzera pakukhuthala kwake, kulepheretsa zodzaza kuti zisakhazikike. Kwa zodzaza ndi kukula kwa tinthu tating'onoting'ono, kukhuthala kwa HEC ndikofunikira kwambiri, komwe kumatha kusunga utoto wokhazikika.
Kuwala ndi kukhudza kwa zokutira: Kuwonjezera kwa zodzaza nthawi zambiri kumakhudza gloss ndi kukhudza kwa zokutira. AnxinCel®HEC ikhoza kupititsa patsogolo maonekedwe a zokutira posintha kagawidwe ndi kakonzedwe ka zodzaza. Mwachitsanzo, kubalalitsidwa kwa yunifolomu kwa tinthu tating'onoting'ono kumathandizira kuchepetsa kuuma kwa ❖ kuyanika pamwamba ndikuwongolera kusalala ndi gloss ya filimu ya utoto.
5. Kuyanjana pakati pa HEC ndi zina zowonjezera
Mtundu wa penti wa latex umaphatikizansopo zina zowonjezera, monga defoamers, preservatives, wetting agents, etc. Zowonjezera izi zikhoza kugwirizana ndi HEC pamene zikuwongolera ntchito ya utoto:
Kuyanjana pakati pa defoamers ndi HEC: Ntchito ya defoamers ndi kuchepetsa thovu kapena thovu mu utoto, ndipo mawonekedwe apamwamba a viscosity a HEC angakhudze zotsatira za defoamers. Kuchulukitsitsa kwa HEC kungapangitse kuti zikhale zovuta kuti defoamer achotse chithovu chonsecho, motero zimakhudza mtundu wa utoto. Choncho, kuchuluka kwa HEC yowonjezeredwa kumayenera kugwirizanitsidwa ndi kuchuluka kwa defoamer kuti akwaniritse zotsatira zabwino.
Kuyanjana pakati pa zoteteza ndi HEC: Udindo wa zotetezera ndikuletsa kukula kwa tizilombo toyambitsa matenda mu utoto ndikuwonjezera nthawi yosungira utoto. Monga polima zachilengedwe, mawonekedwe a mamolekyu a HEC amatha kuyanjana ndi zinthu zina zotetezera, zomwe zimakhudza zotsatira zake zotsutsana ndi kutu. Chifukwa chake, ndikofunikira kusankha chosungira chomwe chimagwirizana ndi HEC.
Udindo waHECmu latex utoto si thickening, koma mogwirizana ake ndi polima emulsions, inki, fillers ndi zina zina olowa amatsimikiza ntchito lalabala utoto. AnxinCel®HEC imatha kusintha mawonekedwe a penti ya latex, kupititsa patsogolo kufalikira kwa ma pigment ndi ma fillers, komanso kukulitsa mawonekedwe amakina ndi kulimba kwa zokutira. Kuphatikiza apo, mphamvu ya synergistic ya HEC ndi zowonjezera zina zimakhudzanso kukhazikika kosungirako, ntchito yomanga ndi mawonekedwe opaka utoto wa latex. Chifukwa chake, popanga utoto wa utoto wa latex, kusankha koyenera kwa mtundu wa HEC ndi kuchuluka kwake komanso kuchuluka kwa kuyanjana kwake ndi zinthu zina ndizofunika kwambiri pakuwongolera ntchito yonse ya utoto wa latex.
Nthawi yotumiza: Dec-28-2024