Hydroxypropyl methylcellulose, yitwa: HPMC cyangwa MHPC. Ishusho yayo ni ifu yera cyangwa yera cyane; ikoreshwa cyane cyane nk'ikintu gikwirakwiza polivinili kloride, kandi ni yo yunganira cyane mu gutegura PVC hakoreshejwe polimeri. Mu bwubatsi bw'inganda z'ubwubatsi, ikoreshwa cyane cyane mu bwubatsi bw'imashini nko kubaka inkuta, gusigwa, gufunga imitako, nibindi; cyane cyane mu bwubatsi bw'imitako, ikoreshwa mu gusiga amatafari ya ceramic, marble, n'imitako ya pulasitiki. Ifite imbaraga nyinshi zo gufatanya kandi ishobora kugabanya ingano ya sima. . Ikoreshwa nk'ingufu mu nganda zisiga amarangi, ishobora gutuma urwego rubengerana kandi rworoshye, ikarinda gukuraho ifu, ikanoza imikorere yo kuzunguruka, nibindi.
Mu gikoresho cya sima n'igitaka gishingiye kuri gypsum, hydroxypropyl methylcellulose igira uruhare mu kubika amazi no kuyagwingira, ibyo bikaba bishobora kunoza neza imbaraga zihuza n'ubudahangarwa bw'igitaka.
Ibintu nk'ubushyuhe bw'umwuka, ubushyuhe n'umuvuduko w'umuyaga bigira ingaruka ku gipimo cyo guhindagurika kw'amazi mu byuma bya sima n'ibikomoka kuri gypsum. Kubwibyo, mu bihe bitandukanye, hari itandukaniro mu ngaruka zo kubika amazi ku bicuruzwa bifite ingano imwe ya hydroxypropyl methylcellulose.
Mu buryo bwihariye, ingaruka zo kubika amazi mu gishanga zishobora guhindurwa binyuze mu kongera cyangwa kugabanya ingano ya HPMC yongewemo. Kubika amazi mu gishanga cya methyl cellulose mu gihe cy'ubushyuhe bwinshi ni ikimenyetso cy'ingenzi cyo gutandukanya ubwiza bwa methyl cellulose ether.
Ibicuruzwa byiza cyane bya hydroxypropyl methylcellulose bishobora gukemura neza ikibazo cyo kubika amazi mu gihe cy'ubushyuhe bwinshi. Mu bihe by'ubushyuhe bwinshi, cyane cyane mu bice bishyushye n'ibyumye ndetse n'imiterere y'ubutaka ku ruhande rw'izuba, HPMC nziza irakenewe kugira ngo amazi akomeze kubika amazi mu buryo bwiza.
HPMC nziza cyane ifite uburyo bwo guhuza neza. Amatsinda yayo ya methoxy na hydroxypropoxy akwirakwira ku buryo bungana ku ruhererekane rwa molekile ya cellulose, ibi bikaba bishobora kunoza ubushobozi bwa atome za ogisijeni ku migozi ya hydroxyl na ether bwo kwihuza n'amazi kugira ngo habeho imigozi ya hydrogène. , bityo amazi yigenga aba amazi afatanye, kugira ngo agenzure neza imyuka y'amazi iterwa n'ikirere gishyushye cyane, kandi agere ku kubika amazi menshi.
Amazi arakenewe kugira ngo ibikoresho bikoresha sima bishyirwemo amazi nka sima na gypsum bishyirwemo amazi. Ingano ikwiye ya HPMC ishobora kugumana amazi mu gishishwa igihe kirekire kugira ngo uburyo bwo gushyiraho no gukomera bukomeze.
Ingano ya HPMC ikenewe kugira ngo amazi akomeze kubikwa iterwa na:
1. Uburyo urwego rw'ibanze rufata ibintu
2. Imiterere ya mortiweri
3. Ubugari bw'urukuta rwa morti
4. Gukenera amazi ya mortiweri
5. Igihe cyo gushyiraho ibikoresho bya jelling
Hydroxypropyl methylcellulose nziza cyane ishobora gukwirakwizwa mu buryo bumwe kandi neza mu bintu bikozwe muri sima no muri gypsum, igapfunyika uduce twose tw’ingenzi, igakora agahu ko kunywesha, kandi ubushuhe mu gice cyo hasi bugasohoka buhoro buhoro mu gihe kirekire, hamwe n’uburyo bwo guhumeka hamwe n’ibikoresho bitagira umwimerere bya gelling kugira ngo bikomeze gufatana no gukomera kw’ibikoresho.
Kubwibyo, mu bwubatsi bushyuha cyane mu mpeshyi, kugira ngo amazi agerweho, ni ngombwa kongeramo ibikoresho byiza bya HPMC mu bwinshi buhagije hakurikijwe formula, bitabaye ibyo, amazi ntahagije azaba ahari, imbaraga nke, gucikamo ibice, gupfuka no gushonga bitewe n'ibibazo byumye cyane, ariko nanone byongera ingorane z'abakozi mu bwubatsi. Uko ubushyuhe bugenda bugabanuka, ingano y'amazi HPMC yongewemo ishobora kugabanuka buhoro buhoro, kandi ingaruka imwe yo kubika amazi ishobora kugerwaho.
Igihe cyo kohereza: Mutarama 16-2023