Udindo wa hydroxyethyl cellulose mu utoto wa latex

Hydroxyethyl Cellulose (HEC) ndi polima wamba wosungunuka m'madzi womwe umagwiritsidwa ntchito kwambiri mu utoto wa latex. Sizimangogwira ntchito yofunikira pakuwongolera magwiridwe antchito azinthu, komanso zimathandizira kwambiri zomwe zimachitika pakugwiritsa ntchito komanso mtundu wafilimu yomaliza yophimba.

Makhalidwe a Hydroxyethyl Cellulose
Hydroxyethyl cellulose ndi nonionic cellulose ether yopangidwa kuchokera ku cellulose yachilengedwe kudzera kusinthidwa kwa etherification. Ili ndi kukhuthala bwino, kuyimitsa, kufalitsa ndi kutulutsa emulsifying. Zinthuzi zimathandiza HEC kupanga ma colloids okhazikika m'madzi amadzimadzi okhala ndi mamasukidwe apamwamba komanso ma rheological properties. Kuphatikiza apo, yankho lamadzi la HEC lili ndi kuwonekera bwino komanso kuthekera kosunga madzi moyenera. Makhalidwewa amachititsa kuti azigwiritsidwa ntchito kwambiri mu utoto wa latex.

Ntchito mu utoto wa latex
thickener
Monga chimodzi mwazowonjezera kwambiri za utoto wa latex, ntchito yofunika kwambiri ya HEC ndikuwonjezera kukhuthala kwamadzi a utoto. Kukhuthala koyenera sikungowonjezera kukhazikika kosungirako utoto wa latex, komanso kuteteza mpweya ndi delamination. Kuphatikiza apo, kukhuthala koyenera kumathandizira kuwongolera kutsika ndikuwonetsetsa kukhazikika bwino komanso kufalikira pakagwiritsidwe ntchito, potero kumapeza filimu yokutira yofananira.

kukhazikika kwabwino
HEC imatha kusintha kwambiri kukhazikika kwa utoto wa latex. M'mapangidwe a utoto wa latex, HEC imatha kuteteza ma pigment ndi fillers kuti asakhazikike, kulola utoto kuti ukhalebe wobalalika panthawi yosungidwa ndikugwiritsa ntchito. Katunduyu ndi wofunikira kwambiri pakusungidwa kwa nthawi yayitali, kuthandiza kukulitsa moyo wa alumali wa utoto wa latex.

Kusunga madzi
Kupanga utoto wa latex nthawi zambiri kumaphatikizapo kugwiritsa ntchito madzi ochulukirapo, ndipo zinthu zabwino kwambiri za HEC zosungira madzi zimasunga filimu yopaka utoto wonyezimira panthawi yowumitsa, kupeŵa zolakwika zapamtunda monga kusweka, ufa ndi mavuto ena omwe amayamba chifukwa cha kutuluka kwamadzi mwachangu. . Izi sizimangothandiza kupanga filimu yophimba, komanso kumapangitsanso kumatira ndi kukhazikika kwa filimu yophimba.

Kusintha kwa Rheology
Monga rheology modifier, HEC ikhoza kusintha khalidwe la kumeta ubweya wa utoto wa latex, ndiko kuti, kukhuthala kwa utoto kumachepetsedwa pamtengo wapamwamba wa kukameta ubweya (monga brushing, roller coating, kapena kupopera mbewu mankhwalawa), kuti zikhale zosavuta kugwiritsa ntchito, komanso otsika kukameta ubweya mitengo. Kubwezeretsa kukhuthala kwa mikwingwirima (mwachitsanzo pakupuma) kumalepheretsa kugwa ndi kutuluka. Katundu wa rheological uyu amakhudza mwachindunji pakumanga ndi kumalizidwa komaliza kwa utoto wa latex.

Zomangamanga
Kuyambitsidwa kwa HEC kumatha kusintha kwambiri magwiridwe antchito a utoto wa latex, kupangitsa utoto kukhala wosalala komanso wofananira panthawi yogwiritsira ntchito. Ikhoza kuchepetsa zizindikiro za burashi, kupereka kusalala kwabwino ndi gloss ya filimu yokutira, ndikusintha luso la wosuta.

Sankhani ndi kugwiritsa ntchito
M'mapangidwe a utoto wa latex, kusankha ndi mlingo wa HEC uyenera kusinthidwa malinga ndi zofunikira za ntchito. HEC yokhala ndi ma viscosity osiyanasiyana ndi madigiri olowa m'malo adzakhala ndi zotsatira zosiyana pakuchita kwa utoto wa latex. Nthawi zambiri, mawonekedwe owoneka bwino a HEC ndi oyenera kupenta zothimbirira za latex zomwe zimafuna kukhuthala kwapamwamba, pomwe mawonekedwe otsika amawonekedwe a HEC ndi oyenera utoto wopaka utoto wokhala ndi madzi abwinoko. Kuphatikiza apo, kuchuluka kwa HEC yowonjezeredwa kumafunika kukonzedwa malinga ndi zosowa zenizeni. Kuchuluka kwa HEC kumayambitsa kukhuthala kochulukirapo kwa zokutira, zomwe sizothandiza kumanga.

Monga chowonjezera chogwira ntchito, hydroxyethyl cellulose imagwira ntchito zingapo mu utoto wa latex: makulidwe, kukhazikika, kusunga madzi ndikuwongolera magwiridwe antchito. Kugwiritsa ntchito moyenera kwa HEC sikungangowonjezera kukhazikika kosungirako komanso ntchito yomanga ya utoto wa latex, komanso kumapangitsanso kwambiri kukhazikika komanso kulimba kwa filimu yophimba. Ndi chitukuko cha mafakitale okutira komanso kupita patsogolo kwaukadaulo, chiyembekezo chogwiritsa ntchito HEC mu utoto wa latex chidzakhala chokulirapo.