I-Hydroxyethyl cellulose iyi-viscosity grade ephakathi kuya kwephezulu ye-cellulose ether, esetshenziswa njengesithambisi kanye nesiqinisi sezingubo ezisekelwe emanzini, ikakhulukazi lapho i-viscosity yokugcina iphezulu futhi i-viscosity yokusetshenziswa iphansi. I-cellulose ether kulula ukuyihlakaza emanzini abandayo anenani le-pH ≤ 7, kodwa kulula ukuyihlanganisa ku-alkaline liquid enenani le-pH ≥ 7.5, ngakho-ke kumelwe sinake ukuhlakazeka kwe-cellulose ether.
Izici kanye nokusetshenziswa kwe-hydroxyethyl cellulose:
1. Isithambisi samanzi esingeyona i-ionic esilwa nama-enzyme, esingasetshenziswa ngenani elibanzi le-pH (PH=2-12).
2. Kulula ukuyihlakaza, ingafakwa ngqo ngesimo sempuphu eyomile noma ngesimo se-slurry lapho kugaywa ama-pigment nama-filler.
3. Ukwakhiwa okuhle kakhulu. Inezinzuzo zokonga abasebenzi, akulula ukuyiconsa nokuyilenga, kanye nokumelana okuhle nokuchaphaza.
4. Ukuhambisana kahle nama-surfactants ahlukahlukene kanye nezilondolozi ezisetshenziswa kupende we-latex.
5. I-viscosity yokugcina izinzile, okungavimbela i-viscosity yepende le-latex ukuthi inciphe ngenxa yokubola kwama-enzyme ku-hydroxyethyl cellulose ejwayelekile.
Izakhiwo ze-Hydroxyethyl Cellulose
I-Hydroxyethyl cellulose ether iyi-polymer engeyona i-ionic encibilikayo emanzini. Iyimpuphu emhlophe noma ephuzi ekhanyayo egeleza kalula. Ngokuvamile ayincibiliki ezincibilikisini eziningi eziphilayo
1. I-HEC iyancibilika emanzini ashisayo noma emanzini abandayo, futhi ayivuthi uma izinga lokushisa eliphezulu noma libila, okwenza ibe nezici eziningi zokuncibilika kanye nokuthamba, kanye ne-gelation engashisi.
2. Ayiyona i-ionic futhi ingahlala ndawonye namanye ama-polymer ancibilika emanzini, ama-surfactants, kanye nosawoti. Iyisithako esihle kakhulu se-colloidal sezixazululo eziqukethe ama-electrolyte aqukethe ukugcwala okuphezulu.
3. Umthamo wokugcina amanzi uphakeme ngokuphindwe kabili kunowe-methyl cellulose, futhi unokulawulwa okungcono kokugeleza kwamanzi.
4. Uma kuqhathaniswa ne-methyl cellulose eyaziwayo kanye ne-hydroxypropyl methyl cellulose, ikhono lokuhlakaza le-HEC libi kakhulu, kodwa ikhono lokuvikela i-colloid linamandla kakhulu (linemibala).
Ukuqina
Kuthinta ukusebenza kahle, njengokuthi: ukugoba, ukumelana nokuchaphaza, ukumelana nokulahlekelwa; isakhiwo senethiwekhi esikhethekile se-cellulose ether singazinzisa i-powder ohlelweni lokumboza, sinciphise ijubane lokuhlala kwayo, futhi senze uhlelo luthole umphumela ongcono wokugcina.
Ukumelana okuhle namanzi
Ngemva kokuba ifilimu yopende yomile ngokuphelele, inokumelana okuhle kwamanzi. Lokhu kubonisa ikakhulukazi inani lokumelana kwayo namanzi ohlelweni lokwakheka lwe-PVC ephezulu. Kusukela kumafomula angaphandle kuya kwawaseShayina, kulolu hlelo lwe-PVC ephezulu, inani le-cellulose ether engeziwe ngokuyisisekelo lingu-4-6‰.
ukugcinwa kwamanzi okuhle kakhulu
I-Hydroxyethyl cellulose ingandisa isikhathi sokuchayeka futhi ilawule isikhathi sokomisa ukuze ithole ukwakheka okungcono kwefilimu; phakathi kwazo, ukugcinwa kwamanzi kwe-methyl cellulose ne-hypromellose kwehla kakhulu ngaphezu kuka-40°C, kanti ezinye izifundo zakwamanye amazwe zikholelwa ukuthi kungancishiswa ngo-50%, amathuba ezinkinga ehlobo kanye nokushisa okuphezulu anda kakhulu.
Ukuqina okuhle ukunciphisa ukugoba kopende
Susa ukuthungwa, i-syneresis kanye ne-flocculation; okwamanje, i-hydroxyethyl cellulose ether uhlobo lomkhiqizo olungeyona i-ionic. Ayisabelani nezithasiselo ezahlukahlukene ohlelweni.
Ukuhambisana okuhle nohlelo olunemibala eminingi
Ukuhambisana okuhle kakhulu kwezinto ezifaka imibala, ama-pigment kanye nama-filler; i-hydroxyethyl cellulose ether inokuthuthukiswa kombala okuhle kakhulu, kodwa ngemva kokuguqulwa, njenge-methyl ne-ethyl, kuzoba nezingozi ezifihliwe zokuhambisana kwe-pigment.
Ukuhambisana okuhle nezinto zokusetshenziswa ezahlukahlukene
Ingasetshenziswa ezinhlelweni ezahlukene zokwakheka kokumboza.
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Isikhathi sokuthunyelwe: Feb-02-2023