Thickeners for latex irangi igomba kuba ihuje neza na latx polymer ivanze, bitabaye ibyo hazabaho ubwinshi bwimiterere muri firime ya coating, kandi guteranya ibice bidasubirwaho bizabaho, bikaviramo kugabanuka kwijimye nubunini bwa coarser. Inkoko zizahindura amafaranga ya emulsion. Kurugero, umubyimba wa cationic uzagira ingaruka zidasubirwaho kuri anionic emulisiferi kandi bitera demulisifike. Icyiza cya latex cyiza cyane kigomba kugira ibintu bikurikira:
1. Umubare muke hamwe nubwiza bwiza
2. Guhunika neza kubika neza, ntibizagabanya ubukonje bitewe nigikorwa cya enzymes, kandi ntibizagabanya ubukonje bitewe nimpinduka zubushyuhe nagaciro ka pH
3. Kubika amazi meza, nta mwuka ugaragara
4. Nta ngaruka mbi kumiterere ya firime irangi nko kurwanya scrub, gloss, guhisha imbaraga hamwe no kurwanya amazi
5. Nta flokculation ya pigment
Kwiyongera kwikoranabuhanga rya latex ni igipimo cyingenzi cyo kuzamura ubwiza bwa latex no kugabanya ibiciro. Hydroxyethyl selulose ni umubyimba mwiza, ufite ingaruka nyinshi mubikorwa byo kubyimba, gutuza no guhindura imvugo ya latex.
Mubikorwa byo gukora amarangi ya latex, hydroxyethyl selulose (HEC) ikoreshwa nkumuti ukwirakwiza, kubyimbye no guhagarika pigment kugirango uhagarike ububobere bwibicuruzwa, kugabanya agglomeration, gukora firime yamabara neza kandi neza, kandi bituma irangi rya latex riramba. . Imvugo nziza, irashobora kwihanganira imbaraga zogosha, kandi irashobora gutanga urwego rwiza, irwanya ibishushanyo hamwe nuburinganire. Muri icyo gihe, HEC ifite akazi keza cyane, kandi irangi rya latex ryijimye hamwe na HEC rifite pseudoplastique, bityo rero koza, kuzunguruka, kuzuza, gutera, hamwe nubundi buryo bwubwubatsi bifite ibyiza byo kuzigama abakozi, ntibyoroshye kubisobanura, kugabanuka, no kumeneka gake. HEC ifite iterambere ryiza cyane. Ifite kwibeshya cyane kubantu benshi basiga amabara na binders, bigatuma irangi rya latex rifite amabara meza kandi ahamye. Guhinduranya muburyo bwo gushyira mubikorwa, ni ether itari ionic. Kubwibyo, irashobora gukoreshwa muburyo bugari bwa pH (2 ~ 12), kandi irashobora kuvangwa nibigize muri rusange irangi rya latex nka pigment reaction, inyongeramusaruro, umunyu ushonga cyangwa electrolytike.
Nta ngaruka mbi kuri firime yo gutwikira, kubera ko igisubizo cyamazi ya HEC gifite ibimenyetso bigaragara hejuru yubushyuhe bwamazi, ntabwo byoroshye kubira ifuro mugihe cyo kubyara no kubaka, kandi imyumvire yibyobo byibirunga na pinhole ni bike.
Ububiko bwiza. Mugihe cyo kubika igihe kirekire, gutandukana no guhagarika pigment birashobora gukomeza, kandi ntakibazo cyo kureremba amabara no kumera. Hano hari amazi make hejuru y irangi, kandi iyo ubushyuhe bwububiko buhindutse cyane. Ubukonje bwacyo buracyahagaze neza.
HEC irashobora kongera agaciro ka PVC (ubunini bwa pigment concentration) igizwe cyane kugeza 50-60%. Mubyongeyeho, hejuru yubuso bwimbitse bwamabara ashingiye kumazi arashobora kandi gukoresha HEC.
Kugeza ubu, ibibyimbye bikoreshwa mu gihugu cyo hagati no mu rwego rwo hejuru amarangi ya latx yatumijwe mu mahanga HEC na polymer acrylic (harimo polyacrylate, homopolymer cyangwa copolymer emulsion umubyimba wa acide acrylic na acide methacrylic).
Hydroxyethyl selulose irashobora gukoreshwa kuri
1. Nka kole ikwirakwiza cyangwa ikingira
Mubisanzwe, HEC ifite viscosity ya 10-30mPaS ikoreshwa. HEC ishobora gukoreshwa kugeza kuri 300mPa · S izagira ingaruka nziza zo gukwirakwiza niba ikoreshejwe ifatanije na anionic cyangwa cationic surfactants. Igipimo cya dosiye ni 0,05% ya misa ya monomer.
2. Nkibyimbye
Koresha 15000mPa. Igipimo cyerekana urugero-rwinshi cyane HEC hejuru ya s ni 0.5-1% yumubare wuzuye wamabara ya latex, kandi agaciro ka PVC gashobora kugera kuri 60%. Koresha HEC ya 20Pa, s mu irangi rya latex, kandi imikorere yamabara ya latex nibyiza. Igiciro cyo gukoresha HEC hejuru ya 30O00Pa.s kiri hasi. Nyamara, kuringaniza imiterere ya latex ntabwo ari nziza. Urebye ibisabwa byujuje ubuziranenge no kugabanya ibiciro, nibyiza gukoresha ikigereranyo giciriritse kandi kinini HEC hamwe.
3. Uburyo bwo kuvanga irangi rya latex
HEC itunganijwe neza HEC irashobora kongerwamo ifu yumye cyangwa paste. Ifu yumye yongewe muburyo bwo gusya. PH kumwanya wo kugaburira igomba kuba 7 cyangwa munsi. Ibigize alkaline nka Yanbian ikwirakwiza birashobora kongerwaho nyuma ya HEC itose kandi igatatana rwose. Ibishishwa bikozwe na HEC bigomba guhuzwa mubitaka mbere yuko HEC ibona umwanya uhagije wo kuvomera no kwemerera kubyimba kumiterere idakoreshwa. Birashoboka kandi gutegura HEC pulp hamwe na Ethylene glycol coalescing agent.
4. Kurwanya-gushushanya irangi rya latex
Amazi ashonga HEC izahindura biodegrade mugihe ihuye nibishusho bigira ingaruka zidasanzwe kuri selile n'ibiyikomokaho. Ntabwo bihagije kongeramo imiti irinda irangi ryonyine, ibice byose bigomba kuba bidafite enzyme. Ikinyabiziga gikora amarangi ya latx kigomba guhorana isuku, kandi ibikoresho byose bigomba guhora bihindurwamo amavuta 0.5% ya foromine cyangwa umuti wa mercure O.1%.
Igihe cyo kohereza: Ukuboza-26-2022