Iyo yakakwirira viscosity yehydroxypropyl methylcellulose, zviri nani kuchengetedza mvura kuita.Viscosity chinhu chakakosha parameter yeHPMC kuita.Parizvino, vagadziri veHPMC vakasiyana vanoshandisa nzira dzakasiyana uye zviridzwa kuyera viscosity yeHPMC.Nzira huru ndiHaake Rotovisko, Hoppler, Ubbelohde uye Brookfield.
Pachigadzirwa chimwe chete, mhedzisiro yeviscosity yakayerwa nenzira dzakasiyana inosiyana zvakanyanya, uye dzimwe dzakatosiyana zvakapetwa kaviri.Naizvozvo, kana uchienzanisa viscosities, ita shuwa kuti uzviite pakati pedzimwe nzira dzekuyedza, kusanganisira tembiricha, spindle, nezvimwe.
Nezve saizi yezvidimbu, kukwenenzvera kwezvikamu, kunova nani kuchengetedza mvura.Kana zvikamu zvakakura zve cellulose ether zvakasangana nemvura, pamusoro pemvura pakarepo inonyunguduka kuti igadzire gel, iyo inoputira zvinhu uye inodzivirira kuenderera mberi kwekupinda kwemamorekuru emvura..Iyo inonyanya kukanganisa kuchengetwa kwemvura kweiyo cellulose ether, uye solubility chimwe chezvinhu pakusarudza cellulose ether.Fineness zvakare yakakosha kuita chiratidzo chemethylcellulose ether.Iyo MC inoshandiswa mudhaka rakaoma inodiwa kuve yehupfu, ine hunyoro hushoma, uye kutsetseka kunodawo 20% kusvika 60% yehukuru hwechikamu kuti ive isingasviki 63um.Fineness inokanganisa kunyungudika kwehydroxypropyl methylcellulose ether.Coarse MC inowanzoita granular uye nyore kunyungudika mumvura isina caking, asi chiyero chekunyungudika chinononoka, saka haina kukodzera kushandiswa mudhaka rakaoma.Mudhaka rakaoma, MC inoparadzirwa mune simende zvinhu senge aggregate, yakanaka yekuzadza uye simende.Hupfu hwakakwana chete hunodzivirira methylcellulose ether kubva pakuungana kana yakasanganiswa nemvura.Kana MC ichiwedzera mvura kunyungudutsa akaunganidzwa, zvinonetsa kuparadzira nekunyungudutsa.MC ine coarser fineness haingokonzeri tsvina, asiwo inoderedza simba remunharaunda yedhaka.Kana rudzi urwu rwedhaka rakaoma rakavakwa pamusoro penzvimbo huru, kukurumidza kuporesa kwedhaka rakaoma remunharaunda rinoderedzwa zvakanyanya, uye kuputika kunoitika nekuda kwekusiyana kwekuporesa nguva.Kupfapfaidza dhaka uchishandisa machira ekuvaka, kunaka kwepamusoro kunodiwa nekuda kwenguva pfupi yekusanganisa.
Kazhinji kutaura, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura.Nekudaro, iyo yakakwira viscosity uye molecular uremu hweMC, kuderera kunoenderana mukunyungudika, izvo zvine kukanganisa kusimba uye kuita kwekuvaka kwedhaka.Iyo yakakwirira iyo viscosity, iyo inonyanya kuoneka iyo thickening mhedzisiro yedhaka, asi haina kuenzana.Iyo yakakwirira viscosity, iyo inonamira iyo dhaka rakanyorova.Ichanamatira kune scraper panguva yekuvaka uye ine yakakwirira kunamatira kune substrate.Asi zvinoita zvishoma kuwedzera kusimba kwechimiro chedhaka rakanyorova pacharo.Munguva yekuvaka, iyo anti-sag performance yakanga isiri pachena.Kusiyana neizvi, mamwe e-low-viscosity asi akagadziridzwa methylcellulose ethers ane zvakanakisa zvivakwa mukuvandudza kusimba kwemaitiro emadhaka akanyorova.
Iyo yakawanda yakawanda ye cellulose ether yakawedzerwa mudhaka, zviri nani kuchengetedza mvura kwekuita, uye yakakwirira viscosity, zviri nani kuchengetedza mvura kushanda.
Iko kunaka kweHPMC zvakare kune imwe mhedzisiro pakuchengetedza kwayo mvura.Kazhinji, kune methyl cellulose ethers ine viscosity yakafanana asi kunaka kwakasiyana, kana huwandu hwekuwedzera hwakafanana, nekunakisa kwacho, zvinoita nani kuchengetedza mvura.
Iko kuchengetwa kwemvura kweHPMC kune zvakare hukama nekushisa kwekushandisa.Kuchengetwa kwemvura kwemethylcellulose ether kunoderera sezvo tembiricha inowedzera.Nekudaro, mumashandisirwo chaiwo emidziyo, dhaka rakaoma rinowanzo kuvakwa pane inopisa substrates ine tembiricha yepamusoro (pamusoro pe40 degrees) munzvimbo dzakawanda, senge putty plastering pamadziro ekunze pasi pezuva rezhizha, izvo zvinowanzo mhanyisa kusimba kwesimende uye kushanduka kwemavara. simende.kuomesa.Dry mortar.Kuderera kwekuchengetwa kwemvura kunojekesa kuti kushanda uye kusagadzikana kwekuputika kuchakanganiswa, uye zvinonyanya kukosha kuderedza simba remamiriro ekushisa pasi pemamiriro ezvinhu akadaro.Kunyange zvazvo methylhydroxyethylcellulose ether additives parizvino inoonekwa seiri pamberi pekuvandudza tekinoroji, kuvimba kwavo netembiricha kunogona kukonzera kupera simba kwedhaka rakaoma.Kunyangwe muyero wemethylhydroxyethylcellulose (Xia formula) wakawedzerwa, iyo processability uye kutsemuka kuramba kuchiri kusakwanisa kuzadzisa zvinodiwa zvekushandisa.Kuburikidza nemamwe marapirwo akakosha, akadai sekuwedzera dhigirii reetherification, nezvimwewo, MC inogona kuchengetedza mvura iri nani pakudziya kwepamusoro, nekudaro ichipa kuita kurinani pasi pemamiriro akaomarara.
Nguva yekutumira: Feb-06-2024