Cellulose ni polysaccharide ikora eferi zitandukanye zishonga amazi.Umubyimba wa selile ni polimeri idafite amazi.Gukoresha amateka ni maremare cyane, imyaka irenga 30, kandi hariho ubwoko bwinshi.Biracyakoreshwa hafi ya latx irangi kandi ni inzira nyamukuru yo kubyimba.Ibibyimba bya selile bigira akamaro cyane muri sisitemu yo mumazi kuko bibyibushye ubwabyo.Mu nganda zo gusiga amarangi, umubyimba wa selile ukoreshwa cyane ni: methyl selulose (MC), hydroxyethyl selulose (HEC), Ethyl hydroxyethyl selulose (EHEC), hydroxypropyl selulose (HPC), hydroxypropyl methyl selulose (HPMC) na hydroxyethyl selile. HMHEC).HEC ni amazi ya elegitoronike ya polysaccharide ikoreshwa cyane mubyimbye bya matt na semi-gloss yubatswe ya latx irangi.Thickeners iraboneka mubyiciro bitandukanye bya viscosity hamwe nubunini hamwe niyi selile ifite ibara ryiza rihuza hamwe nububiko buhamye.
Kuringaniza, kurwanya-gusebanya, gukora firime no kurwanya-kugabanuka kwa firime ya coating biterwa nuburemere bugereranije bwa HEC.HEC hamwe nandi masano adafitanye isano na polymers polymers yongerera icyiciro cyamazi yo gutwikira.Ibibyimba bya selile birashobora gukoreshwa byonyine cyangwa bifatanije nibindi binini kugirango ubone rheologiya idasanzwe.Ethers ya selile irashobora kugira uburemere butandukanye bwa molekuline hamwe nubunini butandukanye bwubwiza butandukanye, uhereye kuburemere buke bwa molekuline nkeya 2% yumuti wamazi hamwe nubwiza bwa MPS 10 kugeza kuri uburemere buke bwa molekuline bugereranije bwa 100 000 MP.S.Uburemere buke bwa molekuline busanzwe bukoreshwa nka colloide ikingira muri latex irangi irangi rya emulion polymerisation, kandi amanota menshi asanzwe (viscosity 4 800-50 000 MP · S) akoreshwa nkibibyimbye.Uburyo bwubu bwoko bwibyimbye buterwa nubwinshi bwamazi ya hydrogène hamwe no guhuza iminyururu ya molekile.
Gakondo ya selile ni polimeri iremereye cyane yibyibushye cyane cyane binyuze mumurongo uri hagati yiminyururu.Bitewe n'ubukonje bwinshi ku gipimo gito cyo hasi, umutungo uringaniye urakennye, kandi bigira ingaruka kumurabyo wa firime.Ku gipimo cyinshi cyo hejuru, ubukonje buri hasi, guhangana na firime ya coating birakennye, kandi kuzura kwa firime ntago ari byiza.Porogaramu iranga HEC, nko kurwanya brush, gufata amashusho na roller spatter, bifitanye isano itaziguye no guhitamo umubyimba.Na none imitekerereze yacyo nko kuringaniza no kurwanya sag bigira ingaruka cyane kubyimbye.
Hydrophobique yahinduwe selile (HMHEC) ni selile ya selile ifite hydrophobique ihindura iminyururu imwe (amatsinda menshi maremare ya alkyl atangizwa kumurongo munini wimiterere).Iyi kote ifite ubwiza buhanitse ku gipimo cyogosha cyane bityo rero gukora neza film.Nka Natrosol Yongeyeho Icyiciro 330, 331, Cellosize SG-100, Bermocoll EHM-100.Ingaruka yabyimbye iragereranywa nubwa selulose ether yibyibushye hamwe na misile nini cyane ugereranije.Itezimbere ubwiza no kuringaniza ICI, kandi igabanya ubukana bwubuso.Kurugero, ubuso bwubuso bwa HEC bugera kuri 67 MN / m, naho uburemere bwa HMHEC ni 55 ~ 65 MN / m.
HMHEC ifite sprayable nziza, anti-sagging, iringaniza, gloss nziza hamwe na cake irwanya pigment.Irakoreshwa cyane kandi nta ngaruka mbi igira kuri firime yubunini bwiza bwa latex irangi.Imikorere myiza yo gukora firime nibikorwa byo kurwanya ruswa.Iyi mikorere yihariye ikora neza hamwe na sisitemu ya vinyl acetate copolymer, kandi imikorere yayo isa nizindi ntera zifatika, ariko hamwe nuburyo bworoshye.
Igihe cyo kohereza: Werurwe-16-2023