Cov nyhuv ntawm Cellulose Ether hauv Putty Powder Daim Ntawv Thov

Dab tsi yog vim li cas rau cov hmoov putty kom qhuav sai?

Qhov no feem ntau cuam tshuam nrog kev sib ntxiv ntawm cov tshauv calcium thiab cov dej tuav tus nqi ntawm cov fiber ntau, thiab tseem muaj feem cuam tshuam rau qhov dryness ntawm phab ntsa.

Yuav ua li cas tev thiab dov?

Qhov no muaj feem xyuam rau cov dej tuav tus nqi, uas yog ib qho yooj yim tshwm sim thaum lub viscosity ntawm cellulose yog tsawg los yog tus nqi ntawm ntxiv me me.

Tej zaum nws puas muaj cov ntsiab lus?

Qhov no muaj feem xyuam rau cellulose, uas muaj cov yeeb yaj kiab tsis zoo, thiab tib lub sijhawm, cov impurities hauv cellulose hnov ​​​​me ntsis nrog tshauv calcium. Yog tias cov tshuaj tiv thaiv hnyav heev, cov hmoov putty yuav zoo li taum curd residue. Nws tsis tuaj yeem muab tso rau ntawm phab ntsa, thiab nws tsis muaj lub zog cohesive tib lub sijhawm. Tsis tas li ntawd, qhov xwm txheej no kuj tshwm sim nrog cov khoom xws li carboxyl pawg ntxiv rau cov cellulose.

Volcanoes thiab pinholes?

Qhov no yog pom tseeb muaj feem xyuam rau cov dej nto nro ntawm hydroxypropyl methylcellulose aqueous kua. Lub rooj dej nro ntawm hydroxyethyl aqueous tov tsis pom tseeb. Nws yuav yog qhov zoo los ua kev kho kom tiav.

Vim li cas cov hmoov putty ua thinner tom qab ntxiv dej?

Cellulose yog siv los ua thickener thiab dej-retaining tus neeg sawv cev nyob rau hauv lub putty. Vim yog thixotropy ntawm cellulose nws tus kheej, qhov sib ntxiv ntawm cellulose nyob rau hauv cov hmoov putty kuj ua rau thixotropy tom qab ntxiv dej rau lub putty. Qhov no thixotropy yog tshwm sim los ntawm kev puas tsuaj ntawm lub loosely ua ke qauv ntawm cov khoom nyob rau hauv lub putty hmoov. Cov qauv no tshwm sim thaum so thiab so hauv kev ntxhov siab. Uas yog hais tias, lub viscosity txo nyob rau hauv stirring, thiab viscosity rov qab thaum sawv ntsug.

Dab tsi yog vim li cas vim li cas lub putty kuj hnyav heev hauv cov txheej txheem scraping?

Hauv qhov no, viscosity ntawm cellulose feem ntau siv yog siab dhau. Qee cov neeg tsim khoom siv 200,000 cellulose los ua putty. Lub putty ua nyob rau hauv txoj kev no muaj viscosity siab, yog li nws xav tias hnyav thaum khawb. Qhov pom zoo ntawm putty rau sab hauv phab ntsa yog 3-5 kg, thiab viscosity yog 80,000-100,000.

Vim li cas lub putty thiab mortar ua los ntawm cellulose nrog tib viscosity xav txawv nyob rau lub caij ntuj no thiab lub caij ntuj sov?

Vim lub thermal gelation ntawm cov khoom, lub viscosity ntawm cov khoom yuav maj mam txo nrog qhov nce ntawm qhov kub thiab txias. Thaum qhov kub siab tshaj qhov kub ntawm gel ntawm cov khoom, cov khoom yuav raug precipitated los ntawm dej thiab poob nws viscosity. Chav tsev kub nyob rau lub caij ntuj sov yog feem ntau siab dua 30 degrees, uas txawv ntau ntawm qhov kub ntawm lub caij ntuj no, yog li cov viscosity qis dua. Nws raug nquahu kom xaiv cov khoom uas muaj gel kub thaum siv cov khoom nyob rau lub caij ntuj sov. Lub gel kub ntawm cov khoom feem ntau yog siab dua 75 degrees. Phab ntsa putty lub teb chaws tus qauv (JG / T298-2009) tus qauv yuav tsum, cov khoom zoo yog ruaj khov, xoom voc ib puag ncig kev ua tau zoo. Feem ntau, gel kub ntawm methyl cellulose yog li 55 degrees thaum lub caij ntuj sov. Yog tias qhov kub thiab txias me ntsis, nws cov viscosity yuav cuam tshuam zoo heev.