Imashini zifata amarangi ya latex zigomba kuba zihuye neza n’ibinyabutabire bya latex polymer, bitabaye ibyo hazabaho imiterere mike mu ifiriti yo gusiga, kandi hazabaho ukwiyongera kw’uduce tudahinduka, bigatuma ubukana n’ingano y’uduce dukomeye bigabanuka. Imashini zifata amarangi zizahindura imbaraga za emulsion. Urugero, imashini zifata amarangi ya cationic zizagira ingaruka zidahinduka ku mashini zifata amarangi ya anionic kandi zigatera demulsification. Imashini nziza ifata amarangi ya latex igomba kuba ifite ibi bikurikira:
1. Igipimo gito n'ubushyuhe bwiza
2. Kubika neza, ntibizagabanya ubukana bw'ibinure bitewe n'imikorere ya enzymes, kandi ntibizagabanya ubukana bw'ibinure bitewe n'impinduka mu bushyuhe n'agaciro ka pH
3. Amazi meza kandi nta mwuka ugaragara ugaragara
4. Nta ngaruka mbi ku miterere y'irangi nko kwirinda gukaraba, gukaraba, guhisha imbaraga no kwirinda amazi
5. Nta gukurura ibara
Ikoranabuhanga ryo gukurura irangi rya latex ni igipimo cy'ingenzi cyo kunoza ubwiza bwa latex no kugabanya ikiguzi. Hydroxyethyl cellulose ni uburyo bwiza bwo gukurura, bufite ingaruka nyinshi ku gukurura, gutuza no guhindura imikorere y'irangi rya latex.
Mu ikorwa ry'irangi rya latex, hydroxyethyl cellulose (HEC) ikoreshwa nk'ikintu gikwirakwiza, gikonjesha kandi gihagarika irangi kugira ngo ihamye ubukana bw'umusaruro, igabanye intera, itume firime y'irangi irushaho kuba nziza, kandi itume irangi rya latex riramba. Rheology nziza, ishobora kwihanganira imbaraga nyinshi zo gukata, kandi ishobora gutanga uburyo bwiza bwo kugabanya, kurwanya gushwara no guhuza irangi. Muri icyo gihe, HEC ifite ubushobozi bwo gukora neza, kandi irangi rya latex ryagutse hamwe na HEC rifite ubushobozi bwo gukora, bityo koza, kuzunguza, kuzuza, gutera n'ubundi buryo bwo kubaka bifite ibyiza byo kuzigama akazi, ntabwo byoroshye gukuraho, gucika, no gusiga amavuta make. HEC ifite iterambere ryiza cyane ry'amabara. Ifite ubushobozi bwo gutandukana neza n'ibindi bivangavanze, bituma irangi rya latex rigira ubuziranenge n'ubudahangarwa bw'amabara. Kubera ko ikoreshwa mu buryo butandukanye, ni ether idakoresha ioni. Bityo, ishobora gukoreshwa mu rugero rwa pH runini (2 ~ 12), kandi ishobora kuvangwa n'ibice bigize irangi rya latex muri rusange nka pigments zikora, inyongeramusaruro, umunyu ushongesha cyangwa electrolytes.
Nta ngaruka mbi ku gipfundikizo cyo gusiga, kuko umuti w’amazi wa HEC ufite imiterere igaragara y’ubushyuhe bw’amazi, ntabwo byoroshye kuwufuroza mu gihe cyo kuwukora no kubaka, kandi imiterere y’imyobo n’ibirunga byo mu birunga ni mike.
Kubika neza. Mu gihe cy'igihe kirekire, ibara rishobora gutandukana no kwihagarika, kandi nta kibazo cy'ibara rigenda riguruka no kurabya. Hari urwego ruto rw'amazi ku buso bw'irangi, kandi iyo ubushyuhe bwo kubika buhinduka cyane. Ubushyuhe bwaryo buracyari buhamye.
HEC ishobora kongera agaciro ka PVC (ingano y'ibara ry'umuhondo) kugeza kuri 50-60%. Byongeye kandi, irangi rikoreshwa mu gusiga irangi rishingiye ku mazi rishobora no gukoresha HEC.
Kugeza ubu, ibikoresho bigabanya ubushyuhe bikoreshwa mu irangi rya latex riciriritse n’iry’urwego rwo hejuru ni HEC na acrylic polymer bitumizwa mu mahanga (harimo polyacrylate, homopolymer cyangwa copolymer emulsion thickeners bya aside acrylic na aside methacrylic).
Hydroxyethyl cellulose ishobora gukoreshwa mu
1. Nk'icyuma gikingira cyangwa kole irinda
Muri rusange, HEC ifite ubukana bwa 10-30mPaS irakoreshwa. HEC ishobora gukoreshwa kugeza kuri 300mPa·S izagira ingaruka nziza zo gukwirakwira mu gihe ikoreshejwe hamwe na surfactants za anionic cyangwa cationic. Igipimo cy'ikigereranyo muri rusange ni 0.05% by'uburemere bwa monomer.
2. Nk'ikintu gifasha mu kubyibuha
Koresha 15000mPa. Igipimo cya HEC ifite ubukana bwinshi hejuru ya s ni 0.5-1% by'uburemere bwose bw'irangi rya latex, kandi agaciro ka PVC gashobora kugera kuri 60%. Koresha HEC ya 20Pa,s muri latex, kandi imikorere y'irangi rya latex ni yo myiza kurusha izindi. Igiciro cyo gukoresha HEC iri hejuru ya 30O00Pa.s kiri hasi. Ariko, imiterere y'irangi rya latex ntabwo ari nziza. Ukurikije ibisabwa ku bwiza no kugabanya ikiguzi, ni byiza gukoresha HEC iri hagati n'iy'ubukana bwinshi hamwe.
3. Uburyo bwo kuvanga irangi rya latex
HEC yatunganyijwe ku buso ishobora kongerwamo ifu yumye cyangwa ifu ivanze. Ifu yumye yongerwamo mu buryo butaziguye ku ibara ry'umuhondo. pH iri aho ibiryo bishyirwa igomba kuba 7 cyangwa munsi yayo. Ibice bya alkali nka Yanbian dispersant bishobora kongerwamo nyuma yuko HEC itose kandi igakwirakwira neza. Uduce twakozwe muri HEC tugomba kuvangwa muri slurry mbere yuko HEC igira igihe gihagije cyo kunywesha no gutuma irushaho kuba nziza kugeza igihe idashobora gukoreshwa. Birashoboka kandi gutegura pulp ya HEC ukoresheje ethylene glycol coalescing agents.
4. Kurwanya irangi rya latex rirwanya ifumbire
HEC ishongeshwa mu mazi izangirika iyo ihuye n'ibimera bigira ingaruka zidasanzwe kuri selulose n'ibikomoka kuri yo. Ntabwo bihagije kongeramo ibintu bibungabunga irangi gusa, ibice byose bigomba kuba bidafite enzymes. Uburyo irangi rya latex rikorwamo bugomba kugumana isuku, kandi ibikoresho byose bigomba guhora bisukurwa n'umwuka wa formaline 0.5% cyangwa O.1% ya mercure.
Igihe cyo kohereza: Ukuboza-26-2022