HEC (hydroxyethyl cellulose) is nonionic cellulose ether inoshandiswa zvakanyanya muindasitiri yekupfeka. Mabasa ayo anosanganisira kukora, kuparadzira, kumisa uye kudzikamisa, izvo zvinogona kuvandudza mashandiro ekuvaka uye firimu-kugadzira mhedzisiro yejasi. HEC inonyanya kushandiswa mumvura-based coatings nekuti ine yakanaka solubility yemvura uye kugadzikana kwemakemikari.
1. Nzira yekuita kweHEC
Kukora mhedzisiro
Rimwe remabasa makuru eHEC mukuputira ndiko kukora. Nekuwedzera viscosity yeiyo coating system, iyo yekupfekedza uye kuyera zvivakwa zvinogona kuvandudzwa, iyo sagging chiitiko inogona kuderedzwa, uye kupfekedza kunogona kuumba yunifomu yekuvharisa layer pamadziro kana mamwe maficha. Mukuwedzera, HEC ine simba rakasimba rekukora, saka inokwanisa kuwana yakanakira kukora mhedzisiro kunyangwe nediki yekuwedzera, uye ine hupfumi hwepamusoro.
Kumiswa uye kudzikamisa
Muchirongwa chekuputira, zvimedu zvakasimba senge pigment uye mafirita anofanirwa kuparadzirwa zvakaenzana muhwaro zvinhu, zvikasadaro zvinokanganisa kutaridzika uye kuita kwejasi. HEC inogona kunyatso chengetedza kugoverwa kweyunifomu yezvimedu zvakasimba, kudzivirira kunaya kwemvura, uye kuchengetedza iyo yekupfeka yakagadzikana panguva yekuchengetedza. Iyi yekumisa mhedzisiro inobvumira iyo kupfekedza kuti idzokere kune imwe yunifomu mamiriro mushure mekuchengetedza kwenguva refu, kuderedza stratification uye kunaya.
Kuchengetedza mvura
HEC inogona kubatsira mvura iri mupende kuti isunungurwe zvishoma nezvishoma panguva yekupenda, nekudaro ichiwedzera nguva yekuomeswa kwepende uye kuita kuti ive yakanyatsogadziriswa uye firimu-yakaumbwa pamadziro. Uku kuita kwekuchengetedza mvura kunonyanya kukosha pakugadzirwa kwekuvaka, kunyanya munzvimbo dzinopisa kana dzakaoma dzekuvaka, HEC inogona kuderedza zvakanyanya dambudziko rekuumbwa kwemafirimu asina kunaka kunokonzerwa nekukurumidzira kwemvura.
Rheological regulation
Iyo rheological properties yepende inobata zvakananga kunzwa uye firimu kunaka kwekuvaka. Mushonga wakagadzirwa neHEC mushure mekunyunguduka mumvura ine pseudoplasticity, kureva kuti, viscosity inoderera pasi pesimba guru rekuveura (zvakadai sekuputika uye kuputira), izvo zviri nyore kuputika; asi iyo viscosity inopora pasi yakaderera shear simba, izvo zvinogona kuderedza sagging. Izvi hazvisi kungobatsira kuvaka chete, asiwo zvinovimbisa kufanana uye kukora kwekuputira.
2. Zvakanakira HEC
Kunyungudika kwemvura kwakanaka
HEC chinhu chinonyungudika nemvura polymer. Mushonga wakagadzirwa mushure mekuparadzwa wakajeka uye wakajeka, uye hauna migumisiro yakaipa pamvura-based pendi system. Solubility yayo inotaridzawo kureruka kwayo kwekushandisa mupendero system, uye inogona kunyungudika nekukasira isina kugadzira zvimedu kana agglomerates.
Kugadzikana kwemakemikari
Sezvo isiri-ionic cellulose ether, HEC ine hutano hwakanaka hwemakemikari uye haisi nyore kukanganiswa nezvinhu zvakadai sepH, tembiricha, uye ion simbi. Inogona kuramba yakagadzikana mune yakasimba asidhi uye alkaline nharaunda, saka inogona kuenderana nemhando dzakasiyana dzekupfeka masisitimu.
Kuchengetedza kwezvakatipoteredza
Nekuvandudzwa kwekuziva kwezvakatipoteredza, yakaderera VOC (volatile organic compound) machira ari kuramba achizivikanwa. HEC haina chepfu, haina kukuvadza, haina organic solvents, uye inosangana nezvinodiwa zvekuchengetedza kwezvakatipoteredza, saka ine huwandu hwakasiyana hwemashandisiro ekushandisa mumvura-yakavakirwa zvakatipoteredza zvine hushamwari.
3. Mhedzisiro yeHEC mumashandisirwo anoshanda
Interior wall coatings
Mukati memadziro emukati, HEC seyakakora uye rheology modifier inogona kuvandudza mashandiro ekuvaka kweiyo coating, ichipa iyo yakanaka kuyera uye kunamatira. Mukuwedzera, nekuda kwekuchengetedza kwayo kwakanakisa kwemvura, HEC inogona kudzivirira kutsemuka kana upfu hwemukati wemadziro emadziro panguva yekuomesa.
Exterior wall coatings
Kunze kwemadziro mabhanhire anofanirwa kuve nekunaka kwemamiriro ekunze uye kudzivirira mvura. HEC haigoni kungovandudza kuchengetwa kwemvura uye rheology yekuputira, asiwo kuwedzera pfuma ye-anti-sagging yekuputira, kuitira kuti kuvhara kunogona kurwisana nemhepo nemvura mushure mekuvaka uye kuwedzera hupenyu hwayo hwebasa.
Latex pendi
Mune latex pendi, HEC haingogone kuita seyakakora chete, asi zvakare kuvandudza kunaka kwepende uye kuita kuti firimu rekuputira rive nyore. Panguva imwecheteyo, HEC inogona kudzivirira kunaya kwemavara, kuvandudza kugadzikana kwepende, uye kuita kuti latex pendi igadzikane mushure mekuchengetedza kwenguva refu.
IV. Chengetedzo yekuwedzera uye kushandisa HEC
Dissolution nzira
HEC inowanzowedzerwa kupende mune fomu yehupfu. Paunenge uchishandisa, inoda kuwedzerwa zvishoma nezvishoma kumvura uye kunyatsogadziriswa kuti iparadze zvakaenzana. Kana kuparara kusina kukwana, granular zvinhu zvinogona kuonekwa, zvichikanganisa kutaridzika kwepende.
Dosage control
Huwandu hweHEC hunoda kugadziridzwa zvinoenderana nechimiro chepende uye inodiwa thickening maitiro. Iyo yakawanda yekuwedzera huwandu ndeye 0.3% -1.0% yehuwandu hwese. Kuwedzera kwekuwedzera kuchaita kuti viscosity yepende iwedzere, inokanganisa kushanda kwekuvaka; kusakwana kuwedzera kunokonzeresa matambudziko senge sagging uye kusakwana kwesimba rekuhwanda.
Kuenderana nezvimwe zvinhu
Paunenge uchishandisa HEC, teerera kuenderana nemamwe mapendi ependi, kunyanya pigments, fillers, etc. Mune maitiro akasiyana-siyana epende, rudzi kana huwandu hweHEC hungada kugadziriswa kuti urege kuita zvakaipa.
HEC inoita basa rakakosha muindasitiri yekupfekedza, kunyanya mumvura-based coatings. Inogona kuvandudza kushanda, firimu-kuumba zvivakwa uye kuchengetedza kugadzikana kwejasi, uye ine yakanaka kugadzikana kwemakemikari uye kuchengetedza kwezvakatipoteredza. Seyakadhura-inoshanda thickener uye rheology modifier, HEC inoshandiswa zvakanyanya mukati memadziro emukati machira, ekunze emadziro machira uye latex pendi. Mumashandisirwo anoshanda, kuburikidza neanonzwisisika dosage kudzora uye nzira dzakaringana dzekunyungudika, HEC inogona kupa kwakaringana kukora uye kudzikamisa mhedzisiro yejasi uye kunatsiridza kuita kwese kwejasi.
Nguva yekutumira: Nov-01-2024