Iyo yakakwirira viscosity yehydroxypropyl methylcellulose, zviri nani kuchengetedza kwemvura kuita.Viscosity yakakosha parameter yeHPMC performance.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 zvakasiyana, uye mamwe anotopeta mutsauko.Naizvozvo, kana uchienzanisa viscosity, ita shuwa kuti uzviite pakati pedzimwe nzira dzekuyedza, kusanganisira tembiricha, rotor, nezvimwe.
Pakukura kwechidimbu, kutsetseka kwechikamu, kunova nani kuchengetedza mvura.Mushure mokunge zvikamu zvakakura zve cellulose ether zvakasangana nemvura, nzvimbo yacho inonyunguduka pakarepo kuti iite gel, iyo inoputira zvinhu kudzivirira kupfuurira kupindira kwemamorekuru emvura..Iyo inokanganisa zvakanyanya kuchengetedza kwemvura kweiyo cellulose ether, uye kunyungudika ndechimwe chezvinhu zvekusarudza cellulose ether.Fineness zvakare yakakosha kuita index yemethyl cellulose ether.Iyo MC inoshandiswa pakuoma poda dhaka inodiwa kuti ive hupfu, ine yakaderera mvura yemukati, uye kutsetseka kunodawo 20% kusvika 60% yehukuru hwechikamu kuti ive isingasviki 63um.Fineness inokanganisa kunyungudika kwehydroxypropyl methylcellulose ether.Coarse MC inowanzoita granular, uye iri nyore kunyungudika mumvura isina agglomeration, asi chiyero chekunyungudika chinononoka, saka haina kukodzera kushandiswa mudhaka rakaoma.Mune yakaoma poda dhaka, MC inoparadzirwa pakati pesimende zvinhu senge aggregates, yakanaka mafirita uye simende.Upfu hwakakwana chete hunogona kudzivirira kuunganidzwa kwemethyl cellulose ether kana uchisanganiswa nemvura.Kana MC yawedzerwa nemvura kuti iparadze agglomerates, zvinonetsa kuparadzira nekunyungudutsa.MC ine coarser fineness haisi kungoparadza chete, asiwo inoderedza simba remunharaunda yedhaka.Kana dhaka rakadaro rakaoma rakagadzirwa munzvimbo yakakura, kukurumidza kukurumidza kwepoda yakaoma yepoda yakaderedzwa zvakanyanya, uye kuputika kunoitika nekuda kwekusiyana kwekurapa nguva.Kune dhaka rekupfapfaidza uchishandisa mechanical kuvaka, nekuda kwekupfupika kwekukurudzira nguva, iyo fineness inodiwa kuve yakakwirira.
Kazhinji kutaura, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura.Nekudaro, iyo yakakwira viscosity uye yakakwira iyo molecular uremu hweMC, iyo inoenderana kudzikiswa mukunyungudika kwayo, iyo ine kukanganisa kwakashata pane simba uye kuvaka zvivakwa zvedhaka.Iyo yakakwirira iyo viscosity, iyo inonyanya kuoneka iyo thickening mhedzisiro yedhaka, asi haina kuenzana.Iyo yakakwirira iyo viscosity, iyo yakanyanya kunamira dhaka rakanyorova richava.Panguva yekuvaka, inonamatira kune scraper uye ine yakakwirira kunamatira kune substrate.Asi zvinoita zvishoma kuwedzera simba rekuumbwa kwedhaka rakanyorova pacharo.Panguva yekuvaka, kuita kwekuita kwe-anti-sagging performance hakusi pachena.Pane zvinopesana, mamwe akaderera-viscosity asi akagadziridzwa methyl cellulose ethers ane basa rakanakisa mukuvandudza simba rechimiro chedhaka rakanyorova.
Iyo yakakura huwandu hwe cellulose ether yakawedzerwa mudhaka, zviri nani kuchengetedza kwemvura kuita, iyo yakakwirira viscosity, zviri nani kuchengetedza kwemvura kuita.
Iko kunaka kweHPMC kunewo imwe pesvedzero pakuchengetedza kwayo mvura.Kazhinji, kune methyl cellulose ethers ine viscosity yakafanana asi kunaka kwakasiyana, kana iri imwe chete yekuwedzera, iyo yakatsetseka, inova nani kuchengetedza mvura.
Kuchengetwa kwemvura kweHPMC kunoenderanawo nekupisa kunoshandiswa, uye kuchengetwa kwemvura kwemethyl cellulose ether kunodzikira nekuwedzera kwekushisa.Nekudaro, mune zvinoshanda zvekushandisa, yakaoma poda dhaka inowanzoiswa kune inopisa substrates patembiricha yakakwira (inodarika 40 madhigirii) munzvimbo dzakawanda, sekunze kwemadziro putty plastering pasi pezuva muzhizha, iyo inowanzo mhanyisa Kuporeswa kwesimende uye kuoma kwe. dhaka rakaoma.Kudonha kwekuchengetedza mvura kwaita kuti pave nemafungiro akajeka ekuti zvose kushanda uye kusagadzikana kwekuputika zvinokanganiswa, uye zvinonyanya kukosha kuderedza maitiro ekushisa kwezvinhu pasi pemamiriro ezvinhu akadaro.Kunyangwe methyl hydroxyethyl cellulose ether additive parizvino ichinzi iri pamberi pekuvandudzwa kwetekinoroji, kuvimba kwayo nekupisa kunogona kukonzera kudzikira kwekuita kwedhaka rakaoma.Kunyangwe huwandu hwemethyl hydroxyethyl cellulose (yezhizha fomula) huchiwedzerwa, kushanda uye kuramba kutsemuka hakugone kuzadzisa zvinodiwa zvekushandisa.Kuburikidza nemamwe marapirwo akakosha, akadai sekuwedzera dhigirii reetherification, MC inogona kuchengetedza kuchengetedzwa kwayo kwemvura zvirinani pakupisa kwepamusoro, kuitira kuti ipe kuita kurinani pasi pemamiriro akaomarara.
Nguva yekutumira: Oct-20-2022