HPMC ye Dry yakasanganiswa dhaka

Hunhu hweHPMC mune yakaoma yakasanganiswa dhaka

1, HPMC mune hunhu hweyakajairika dhaka

HPMC inonyanya kushandiswa seretarder uye mvura inochengetedza mumiriri muyero yesimende.Muzvikamu zvekongiri uye dhaka, inogona kuvandudza viscosity uye shrinkage rate, kusimbisa simba rekubatanidza, kutonga nguva yekuisa simenti, uye kuvandudza simba rekutanga uye static flexural simba.Nemhaka yokuti ine basa rekuchengetedza mvura, inogona kuderedza kurasikirwa kwemvura pamusoro pekugadzirisa, inogona kudzivisa kuitika kwekuputika pamucheto, uye inogona kuvandudza kunamatira uye kushanda kwekuvaka.Kunyanya mukuvaka, inogona kurebesa uye kugadzirisa nguva yekumisikidza, nekuwedzera kweHPMC dosage, nguva yekuisa dhaka yakawedzerwa;Kuvandudza machinability uye kupomba, yakakodzera kuvakwa kwemakani;Inogona kuvandudza kushanda kwekuvaka uye kudzivirira mamiriro ekunze emvura-inonyungudika munyu panzvimbo yekuvaka.

2, HPMC mune yakakosha dhaka maitiro

HPMC inonyatso chengetedza mvura yedhaka rakaoma, iyo inoderedza kubuda kweropa uye stratification degree yedhaka uye inovandudza kubatana kwedhaka.HPMC inogona kuvandudza zvakanyanya simba rekusimba uye kusimba kwechisungo chedhaka, kunyangwe simba rekukotama uye simba rekumanikidza redhaka rakaderedzwa zvishoma neHPMC.Uye zvakare, HPMC inogona kunyatso kuvharidzira kuumbwa kwepurasitiki kutsemuka mudhaka, kuderedza kuputika kwepurasitiki indekisi yedhaka, dhaka rekuchengetedza mvura inowedzera nekuwedzera kweiyo viscosity yeHPMC, uye kana viscosity ichipfuura 100000mPa • s, kuchengetwa kwemvura hakusisina. zvakanyanya kuwedzera.HPMC kutsetseka zvakare kune imwe mhedzisiro pachiyero chekuchengetedza mvura yedhaka, kana chidimbu chiri chakanaka, mwero wekuchengetedza mvura wedhaka wakagadziridzwa, unowanzo shandiswa simende dhaka HPMC particle size inofanira kunge isingasviki 180 microns (80 mesh screen) .Izvo zvakakodzera zvemukati zveHPMC mudhaka rakaoma ndeye 1 ‰ ~ 3 ‰.

2.1, dhaka HPMC mushure mekunyungudutswa mumvura, nekuti iyo yepamusoro inoshanda basa rekuona iyo gelled zvinhu zvinobudirira yunifomu kugovera muhurongwa, uye HPMC serudzi rwekudzivirira colloid, "package" yakasimba zvimedu, uye kunze kwayo kwekunze kuita layer yefirimu yekuzora, ita kuti slurry system iwedzere kugadzikana, yakasimudzawo dhaka mukusanganiswa kwemvura uye kuvakwa kwekutsvedza kungangodaro.

2.2 HPMC mhinduro nekuda kweiyo mamorekuru maitiro maitiro, kuitira kuti mvura iri mudhaka isiri nyore kurasikirwa, uye zvishoma nezvishoma inoburitswa munguva yakareba, ichipa dhaka kuchengetedza zvakanaka kwemvura uye kuvaka.Inodzivirira mvura kuti irege kukurumidza kufamba kubva mudhaka kusvika pachigadziko, kuitira kuti mvura yakachengetwa irambe iri pamusoro pezvinhu zvitsva, izvo zvinokurudzira hydration ye simenti uye inovandudza simba rekupedzisira.Kunyanya, kana iyo interface inosangana nesamende dhaka, plaster uye binder inorasikirwa nemvura, chikamu ichi hachina simba uye chinenge chisina simba rekubatanidza.Kazhinji, nzvimbo inosangana nezvinhu izvi ndeye miviri ye adsorption, zvishoma kana zvishoma kutora imwe mvura kubva pamusoro, zvichiita kuti chikamu ichi che hydration chive chisina kukwana, kuitira kuti dhaka resimende uye ceramic tile substrate uye ceramic tile kana plaster uye metope bond simba kuderera.

Mukugadzirira kwedhaka, kuchengetwa kwemvura kweHPMC ndiko kuita kukuru.Zvakaratidzwa kuti kuchengetwa kwemvura kunogona kusvika pa95%.Kuwedzera kweHPMC molecular huremu uye simende dosi inovandudza kuchengetedza kwemvura uye bond simba redhaka.

Muenzaniso: nokuti tile binder inofanira kuva nehupamhi hwechisungo chesimba pakati pechigadziko uye tile, saka binder inobatwa nezvikamu zviviri zvemvura yeadsorption;Base (wall) nzvimbo uye mataira.Special ceramic tile, mutsauko wemhando wakakura kwazvo, mamwe mapores akakura kwazvo, ceramic tile mvura yekunyudza mwero wakakwira, kuitira kuti chisungo chiparadzwe, kuchengetedza mvura kunonyanya kukosha, uye kuwedzera kweHPMC kunogona kusangana neizvi. zvinodiwa.

2.3 HPMC yakagadzikana kune acids uye mabhesi, uye mhinduro yayo yemvura yakanyatsogadzikana muhuwandu hwepH = 2 ~ 12. Caustic soda uye mvura yeraimu haina simba guru pane zvayo, asi alkali inogona kukurumidza kupera kwayo, uye zvishoma. kunatsiridza viscosity.

2.4, yakawedzera HPMC dhaka rekuvaka dhizaini rakagadziridzwa zvakanyanya, dhaka rinoratidzika kunge rine "mafuta", rinogona kuita kuti majoini emadziro azere, akatsetseka pamusoro, kuitira kuti tile kana zvidhinha uye base bonding firm, uye inogona kurebesa nguva yekushanda, yakakodzera yakakura. nzvimbo yekuvaka.

2.5 HPMC imhando isiri-ionic uye isiri-polymeric electrolyte.Iyo yakagadzikana kwazvo mumushonga wemvura ine simbi munyu uye organic electrolytes, uye inogona kuwedzerwa mukuvaka zvinhu kwenguva yakareba kuti ive nechokwadi chekusimba kwayo.

HPMC yekugadzira maitiro inonyanya kuita donje faibha (yemumba) mushure me alkalization, etherification uye kugadzirwa kwepolysaccharide ether zvigadzirwa.Iyo haina kubhadharisa pachayo, uye haibatike neiyo inochajirwa mune iyo gelled zvinhu, uye kuita kwayo kwakagadzikana.Mutengo wacho wakaderera pane mamwe marudzi e-cellulose ether, saka inoshandiswa zvakanyanya mumatope akaoma.

Hydroxypropyl methyl cellulose HPMCbasa mudhaka rakaoma rakasanganiswa:

HPMCinogona kuita kuti musanganiswa mutsva uwedzere kukora kuitira kuti ive nehumwe hunyoro hweviscosity, kudzivirira kupatsanurwa.Kuchengetedzwa kwemvura (kukora) zvakare ndiyo inonyanya kukosha pfuma, inobatsira kuchengetedza huwandu hwemvura yemahara mudhaka, nekudaro ichipa iyo simende nguva yakawanda yekunyorovesa mushure mekuiswa dhaka.(kuchengetwa kwemvura) mhepo yayo, inogona kuunza yunifomu mabhuru madiki, kuvandudza kuvakwa kwedhaka.

Hydroxypropyl methyl cellulose ether viscosity yakakura yekuchengeta mvura kuita kuri nani.Viscosity yakakosha parameter yeHPMC performance.Parizvino, vagadziri vakasiyana HPMC vanoshandisa nzira dzakasiyana uye zviridzwa kuona viscosity yeHPMC.Nzira huru ndeyeHaakeRotovisko, Hoppler, Ubbelohde uye Brookfield, nezvimwewo.

Pachigadzirwa chimwe chete, mhedzisiro yeviscosity yakayerwa nenzira dzakasiyana zvakasiyana zvakanyanya, zvimwe zvakatowanda misiyano.Naizvozvo, kana uchienzanisa viscosity, inofanirwa kuitwa pakati peiyo nzira yekuyedza, kusanganisira tembiricha, rotor, nezvimwe.

Pakukura kwechidimbu, kutsetseka kwechikamu, kunova nani kuchengetedza mvura.Zvimedu zvakakura zve cellulose ether kusangana nemvura, iyo yepamusoro inonyunguduka pakarepo uye inogadzira gel yekuputira zvinhu kudzivirira mamorekuru emvura kuti arambe achipinda mukati, dzimwe nguva nguva yakareba ichibvongodza haigone kuparadzaniswa zvakaenzana kunyungudika, kuumbwa kwedhaka flocculent mhinduro kana agglomerate.Kunyungudika kwe cellulose ether chimwe chezvinhu zvekusarudza cellulose ether.Fineness zvakare yakakosha kuita index yemethyl cellulose ether.MC yedhaka yakaoma inoda hupfu, mvura yakaderera, uye kunaka kwe20% ~ 60% particle size isingasviki 63um.Fineness inokanganisa kunyungudika kwehydroxypropyl methyl cellulose ether.Coarse MC inowanzoita granular uye inogona kunyungudika nyore nyore mumvura isina agglomerating, asi iyo yekunyungudika inononoka, saka haina kukodzera kushandiswa mudhaka rakaoma.Mudhaka rakaoma, MC inoparadzirwa pakati peaggregate, yakanaka mafirita uye simende zvinhu zvakaita sesimende, uye chete hupfu hwakatsetseka hunogona kudzivirira clumping yemethyl cellulose ether kana ichisanganiswa nemvura.Kana MC ichiwedzera mvura kunyungudutsa agglomerate, zvinonetsa kuiparadzira nekuinyungudutsa.MC ine coarse fineness kwete marara chete, asiwo inoderedza simba renzvimbo yedhaka.Kana dhaka rakaoma rakadaro richivakwa munzvimbo yakakura, kukurumidza kuporesa kwevhu rakaoma remunharaunda rinoderedzwa zvakanyanya, zvichiita kuti kuputika kunokonzerwa nenguva yakasiyana yekurapa.Kune mechanical spraying mortar, nekuda kwenguva pfupi yekusanganiswa, kunaka kwakakwirira.

Kazhinji kutaura, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura.Nekudaro, iyo yakakwira viscosity ndeye, iyo yakakwira molecular huremu hweMC, uye kunyungudika kwekuita kunoderera zvinoenderana, izvo zvine kukanganisa kwakashata pakusimba uye kuita kwekuvaka kwedhaka.Iyo yakakwirira viscosity, iyo inonyanya kuoneka iyo thickening mhedzisiro yedhaka, asi haina kuenzana nehukama.Iyo yakakwirira iyo viscosity, iyo yakanyorova dhaka ichave yakanyanya kunamira, zvese kuvaka, kuita kweiyo inonamira scraper uye yakakwirira kunamatira kune base zvinhu.Asi hazvibatsiri kuwedzera simba rekugadzirisa dhaka rakanyorova.Mune mamwe mazwi, iyo anti-sag performance haisi pachena panguva yekuvaka.Pane zvinopesana, imwe yakaderera viscosity asi yakagadziridzwa methyl cellulose ethers ine yakanakisa mashandiro mukuvandudza kusimba kwechimiro chedhaka rakanyorova.

Kuchengetwa kwemvura kweHPMC kwakabatanawo nekupisa kwekushandisa, uye kuchengetwa kwemvura kwemethyl cellulose ether kunodzikira nekukwira kwekushisa.Asi mune chaiyo yekushandiswa kwezvinhu, nzvimbo zhinji dzedhaka rakaoma kazhinji dzinenge dziri mukupisa kwakanyanya (kupfuura 40 madhigirii) pasi pemamiriro ekuvaka munzvimbo inopisa substrate, senge zhizha insolation yekunze kwemadziro putty plastering, iyo yaiwanzo mhanyisa kusimba kwe. simende uye dhaka rakaoma kuoma.Kuderera kwehuwandu hwekuchengetedza mvura kunotungamira kune manzwiro ari pachena ekuti zvese zvekuvaka uye kutsemuka kuramba zvinokanganiswa.Mumamiriro ezvinhu aya, kuderedza simba rekushisa kwezvinhu zvinonyanya kukosha.Panyaya iyi, iyo methyl hydroxyethyl cellulose ether additive parizvino inoonekwa seiri pamberi pekuvandudza tekinoroji.Kunyangwe nekuwedzera kwemethyl hydroxyethyl cellulose dosage (yezhizha fomula), kuvaka uye kuputika kuramba kuchiri kusakwanisa kuzadzisa zvinodiwa zvekushandisa.Kuburikidza nekumwe kurapwa kwakakosha kweMC, sekuwedzera dhigirii reetherification, iyo yekuchengeta mvura mhedzisiro yeMC inogona kuchengetedza iri nani mhedzisiro pasi pekupisa kwakanyanya, kuitira kuti igone kupa kushanda kuri nani pasi pemamiriro akaomarara.

General HPMC ine tembiricha yegel, inogona kukamurwa kuita 60, 65, 75 mhando.Kune yakajairwa-yakasanganiswa dhaka uchishandisa rwizi jecha mabhizinesi aive nani kusarudza yakakwira gel tembiricha 75 HPMC.HPMC dosage haifanirwe kunge yakanyanya kukwirira, yakawandisa inowedzera kudiwa kwemvura yedhaka, inonamatira kune plaster, nguva yekumisikidza yakarebesa, inokanganisa kuvaka.Zvigadzirwa zvedhaka zvakasiyana zvinosarudza zvakasiyana viscosity yeHPMC, usashandise yakakwira viscosity HPMC.Naizvozvo, kunyangwe zvigadzirwa zvehydroxypropyl methyl cellulose zvakanaka, asi zvakanaka kusarudza iyo chaiyo HPMC ndiro basa rekutanga revashandi vebhizinesi murabhoritari.Parizvino, kune vakawanda vatengesi vasiri pamutemo mukomboni neHPMC, mhando yacho haina kusimba, marabhoritari inofanirwa kunge iri mukusarudzwa kweimwe cellulose, ita kuyedza kwakanaka, kuve nechokwadi chekugadzikana kwezvigadzirwa zvedhaka, usachiva zvakachipa, kukonzera kurasikirwa kusingakoshi.