HEC kwa zokutira

HEC (hydroxyethyl cellulose) ndi nonionic cellulose ether yomwe imagwiritsidwa ntchito kwambiri popanga zokutira. Ntchito zake zimaphatikizira kukulitsa, kubalalitsa, kuyimitsa ndi kukhazikika, zomwe zimatha kupititsa patsogolo ntchito yomanga komanso kupanga filimu yopanga zokutira. HEC imagwiritsidwa ntchito kwambiri popaka madzi chifukwa imakhala ndi madzi abwino osungunuka komanso kukhazikika kwa mankhwala.

1. Njira yochitira HEC

Makulidwe zotsatira

Imodzi mwa ntchito zazikulu za HEC mu zokutira ndikukhuthala. Powonjezera kukhuthala kwa makina opaka, kuphimba ndi kuwongolera katundu kumatha kuwongolera, chodabwitsa cha sagging chimachepetsedwa, ndipo chophimbacho chimatha kupanga yunifolomu yophimba pakhoma kapena malo ena. Kuonjezera apo, HEC ili ndi mphamvu yowonjezereka yowonjezereka, kotero imatha kukwaniritsa zotsatira zabwino zowonjezera ngakhale zowonjezera pang'ono, ndipo zimakhala ndi chuma chambiri.

Kuyimitsidwa ndi kukhazikika

Mu makina opaka, tinthu tating'ono tolimba monga ma pigment ndi ma fillers ayenera kumwazikana mofanana muzinthu zapansi, apo ayi zidzakhudza maonekedwe ndi ntchito ya zokutira. HEC imatha kusunga bwino kugawa kofanana kwa tinthu tating'onoting'ono, kuteteza mvula, ndikusunga ❖ kuyanika kokhazikika panthawi yosungira. Kuyimitsidwa kumeneku kumapangitsa kuti chovalacho chibwerere ku chikhalidwe chofanana pambuyo pa kusungidwa kwa nthawi yaitali, kuchepetsa stratification ndi mvula.

Kusunga madzi

HEC ikhoza kuthandizira madzi mu utoto kuti amasulidwe pang'onopang'ono panthawi yojambula, motero amakulitsa nthawi yowuma ya utoto ndikupangitsa kuti ikhale yokwanira bwino komanso kupanga filimu pakhoma. Ntchito yosungira madziyi ndi yofunika kwambiri pa ntchito yomanga, makamaka m'madera otentha kapena owuma, HEC ikhoza kuchepetsa kwambiri vuto la kupanga mafilimu osauka chifukwa cha kuphulika kwa madzi mofulumira.

Rheological regulation

The rheological katundu wa utoto zimakhudza mwachindunji kumverera ndi filimu khalidwe la zomangamanga. Njira yothetsera vutoli yopangidwa ndi HEC itatha kusungunuka m'madzi imakhala ndi pseudoplasticity, ndiko kuti, kukhuthala kumachepa pansi pa mphamvu yometa ubweya wambiri (monga kupukuta ndi kupukuta), komwe kumakhala kosavuta kupukuta; koma mamasukidwe akayendedwe amachira pansi otsika kukameta ubweya mphamvu, amene akhoza kuchepetsa sagging. Izi sizimangothandizira kumanga, komanso zimatsimikizira kufanana ndi makulidwe a zokutira.

2. Ubwino wa HEC

Kusungunuka kwamadzi bwino

HEC ndi chinthu chosungunuka cha polima chosungunuka m'madzi. Yankho lopangidwa pambuyo pa kusungunuka liri lomveka bwino komanso lowonekera, ndipo liribe zotsatira zoipa pa dongosolo la utoto lamadzi. Kusungunuka kwake kumatsimikiziranso kumasuka kwa ntchito mu dongosolo la utoto, ndipo kungathe kusungunuka mwamsanga popanda kupanga particles kapena agglomerates.

Kukhazikika kwamankhwala

Monga non-ionic cellulose ether, HEC ili ndi kukhazikika kwa mankhwala abwino ndipo sichimakhudzidwa mosavuta ndi zinthu monga pH, kutentha, ndi ayoni azitsulo. Ikhoza kukhalabe yokhazikika m'malo a asidi amphamvu ndi amchere, kotero imatha kugwirizanitsa ndi mitundu yosiyanasiyana ya machitidwe opaka.

Chitetezo cha chilengedwe

Ndikusintha kwa chidziwitso cha chilengedwe, zokutira zotsika za VOC (volatile organic compound) zikuchulukirachulukira. HEC ndi yopanda poizoni, yopanda vuto, ilibe zosungunulira za organic, ndipo imakwaniritsa zofunikira zachitetezo cha chilengedwe, kotero ili ndi chiyembekezo chochuluka chogwiritsira ntchito muzopaka zokometsera zachilengedwe zamadzi.

3. Zotsatira za HEC muzogwiritsira ntchito

Zovala zamkati zamkati

Mu zokutira zamkati zamkati, HEC ngati chowonjezera ndi rheology modifier imatha kupititsa patsogolo magwiridwe antchito a zokutira, ndikupangitsa kuti ikhale yabwino komanso kumamatira. Kuonjezera apo, chifukwa cha kusungirako bwino kwa madzi, HEC ikhoza kuteteza ming'alu kapena ufa wa zokutira zamkati mkati mwa kuyanika.

Zopaka kunja kwa khoma

Zovala zakunja zapakhoma zimafunika kukhala ndi nyengo yabwino komanso kukana madzi. HEC sichingangowonjezera kusungirako madzi ndi rheology ya zokutira, komanso kuonjezera katundu wotsutsa-sagging wa zokutira, kotero kuti chophimbacho chikhoza kukana bwino mphepo ndi mvula pambuyo pomanga ndikuwonjezera moyo wake wautumiki.

Utoto wa latex

Mu utoto wa latex, HEC sichingangokhala ngati chokhuthala, komanso imapangitsa kuti utoto ukhale wabwino ndikupangitsa kuti filimu yokutira ikhale yosalala. Panthawi imodzimodziyo, HEC ikhoza kulepheretsa mvula ya pigment, kumapangitsa kuti utoto ukhale wokhazikika, ndikupangitsa utoto wa latex kukhala wokhazikika pambuyo pa kusungidwa kwa nthawi yaitali.

IV. Njira zodzitetezera pakuwonjezera ndi kugwiritsa ntchito HEC

Disolution njira

HEC nthawi zambiri imawonjezeredwa ku utoto mu mawonekedwe a ufa. Mukamagwiritsa ntchito, iyenera kuwonjezeredwa pang'onopang'ono m'madzi ndikugwedezeka mokwanira kuti isungunuke mofanana. Ngati kusungunuka sikukwanira, zinthu za granular zingawoneke, zomwe zimakhudza maonekedwe a utoto.

Kuwongolera mlingo

Kuchuluka kwa HEC kuyenera kusinthidwa molingana ndi mawonekedwe a utoto komanso kufunika kokulirakulira. Kuchuluka kowonjezera ndi 0.3% -1.0% ya ndalama zonse. Kuonjezera kwambiri kumapangitsa kuti kukhuthala kwa utoto kukhale kokwera kwambiri, kumakhudza ntchito yomanga; kuonjezera kosakwanira kungayambitse mavuto monga kugwa komanso kusakwanira mphamvu zobisala.

Kugwirizana ndi zosakaniza zina

Mukamagwiritsa ntchito HEC, samalani kuti mugwirizane ndi zosakaniza zina za utoto, makamaka pigments, fillers, etc. Mu machitidwe osiyanasiyana a penti, mtundu kapena kuchuluka kwa HEC kungafunike kusinthidwa kuti zisawonongeke.

HEC imagwira ntchito yofunika kwambiri pamakampani opanga zovala, makamaka pazovala zamadzi. Ikhoza kupititsa patsogolo ntchito, kupanga mafilimu ndi kusungirako kukhazikika kwa zokutira, ndipo imakhala ndi kukhazikika kwa mankhwala ndi kuteteza chilengedwe. Monga chowonjezera chotsika mtengo komanso chosinthira ma rheology, HEC imagwiritsidwa ntchito kwambiri pakupaka khoma lamkati, zokutira kunja kwa khoma ndi utoto wa latex. M'machitidwe othandiza, kudzera mu kuwongolera kwabwino kwa mlingo ndi njira zoyenera zosungunulira, HEC imatha kupereka kukhuthala ndi kukhazikika kwa zokutira ndikuwongolera magwiridwe antchito onse a zokutira.