Txog hydroxypropyl methylcellulose thaum siv cov hmoov putty

1. Cov teeb meem tshwm sim hauv cov hmoov putty

[Quick drying] Qhov no feem ntau cuam tshuam nrog cov hmoov tshauv calcium ntxiv (loj dhau, nws tuaj yeem txo cov hmoov tshauv calcium hmoov siv hauv cov mis putty) thiab cov dej tuav tus nqi ntawm hydroxypropyl methylcellulose (HPMC), thiab nws kuj muaj feem xyuam rau Nws muaj feem xyuam rau lub dryness ntawm phab ntsa.

[Skinning thiab curling] Qhov no muaj feem xyuam rau cov dej tuav tus nqi. Hydroxypropyl methylcellulose (HPMC) muaj cov viscosity tsawg thiab muaj feem xyuam rau qhov xwm txheej no lossis qhov sib ntxiv me me.

[Kev tshem tawm cov hmoov tshauv sab hauv phab ntsa putty hmoov] Qhov no muaj feem xyuam rau cov hmoov tshauv calcium ntxiv (cov hmoov tshauv calcium hmoov nyob rau hauv cov mis putty tsawg dhau los yog cov purity ntawm cov hmoov tshauv calcium hmoov tsawg dhau, thiab cov hmoov tshauv. calcium hmoov nyob rau hauv cov hmoov putty hmoov yuav tsum tau nce kom tsim nyog) Nyob rau tib lub sij hawm, nws kuj muaj feem xyuam rau tus nqi thiab zoo ntawm hydroxypropyl methylcellulose (HPMC), uas yog reflected nyob rau hauv cov dej tuav tus nqi ntawm cov khoom. Cov dej tuav tus nqi qis, thiab cov calcium oxide nyob rau hauv cov hmoov tshauv calcium hmoov tsis tag absorbed Calcium hydroxide conversion hydration) lub sij hawm tsis txaus, tshwm sim.

[Blistering] Qhov no muaj feem xyuam rau cov av qhuav thiab flatness ntawm phab ntsa, thiab nws kuj muaj feem xyuam rau kev tsim kho.

[Pin cov ntsiab lus tshwm sim] Qhov no muaj feem xyuam rau cellulose, uas muaj cov yeeb yaj kiab tsis zoo, thiab cov impurities hauv hydroxypropyl methylcellulose (HPMC) hnov ​​​​mob me ntsis nrog tshauv calcium. Yog tias cov tshuaj tiv thaiv hnyav heev, cov hmoov putty yuav tshwm sim tofu Slag xeev. Nws tsis tuaj yeem muab tso rau ntawm phab ntsa, thiab nws tsis muaj lub zog cohesive tib lub sijhawm. Tsis tas li ntawd, cov khoom xws li hydroxypropyl methylcellulose (HPMC) tov nrog carboxymethyl pawg kuj tshwm sim hauv qhov teeb meem no.

[Volcanic qhov tsua thiab pinholes tshwm sim] Qhov no pom tseeb muaj feem xyuam rau cov dej nro ntawm hydroxypropyl methylcellulose (HPMC) aqueous tov. Lub rooj dej nro ntawm hydroxyethyl aqueous tov tsis pom tseeb. Nws yuav yog qhov zoo los ua kev kho kom tiav.

[Lub putty yog ib qho yooj yim rau tawg thiab tig daj tom qab ziab] Qhov no muaj feem xyuam rau qhov sib ntxiv ntawm cov hmoov tshauv calcium ntau. Yog hais tias cov hmoov tshauv calcium ntxiv ntau dhau lawm, lub hardness ntawm putty hmoov yuav nce tom qab ziab. Tsuas yog hardness tsis yooj yim yuav tawg yooj yim, tshwj xeeb tshaj yog yuav tawg thaum raug rau sab nraud quab yuam. Nws kuj tseem muaj feem xyuam rau cov ntsiab lus siab ntawm calcium oxide hauv cov hmoov tshauv calcium hmoov.

2. Vim li cas cov hmoov putty ua nyias tom qab ntxiv dej?

Hydroxypropyl methylcellulose (HPMC) yog siv los ua cov thickener thiab dej-retaining tus neeg sawv cev hauv greasy. Vim yog thixotropy ntawm hydroxypropyl methylcellulose (HPMC), hydroxypropyl methylcellulose nyob rau hauv putty hmoov Qhov sib ntxiv ntawm HPMC 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.

3. Dab tsi yog vim li cas vim li cas lub putty kuj hnyav nyob rau hauv cov txheej txheem scraping?

Nyob rau hauv rooj plaub no, viscosity ntawm hydroxypropyl methylcellulose (HPMC) feem ntau siv yog siab dhau lawm, thiab qee cov tuam txhab siv 200,000 yuan los ua putty. Lub putty tsim nyob rau hauv txoj kev no muaj viscosity siab, yog li nws yuav tog thaum batch scraping. kev xav ntawm. Qhov pom zoo ntawm putty rau sab hauv phab ntsa yog 3-5 kg, thiab viscosity yog 80,000-100,000.

4. Vim li cas koj ho xav tias viscosity ntawm hydroxypropyl methylcellulose (HPMC) nrog tib viscosity txawv nyob rau lub caij ntuj no thiab lub caij ntuj sov?

Vim lub thermal gelation ntawm cov khoom, lub viscosity ntawm putty thiab mortar yuav maj mam txo nrog 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 viscosity siab dua thaum siv cov khoom nyob rau lub caij ntuj sov, los yog ua kom cov hydroxypropyl methylcellulose (HPMC), thiab xaiv cov khoom uas muaj gel kub dua.