1. Cov teeb meem tshwm sim hauv cov hmoov putty
qhuav sai
Qhov no feem ntau cuam tshuam nrog cov hmoov tshauv calcium ntxiv (loj heev, cov hmoov tshauv calcium hmoov siv hauv cov mis putty tuaj yeem txo qis) thiab cov dej tuav tus nqi ntawm hydroxypropyl methylcellulose (HPMC), thiab nws kuj muaj feem xyuam rau. qhov dryness ntawm phab ntsa cuam tshuam.
Peeling 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 hydroxypropyl methylcellulose (HPMC) tsawg los yog tus nqi ntxiv me me.
De-powder ntawm sab hauv phab ntsa putty hmoov
Qhov no muaj feem xyuam rau cov hmoov tshauv calcium hmoov (cov hmoov tshauv calcium hmoov nyob rau hauv lub putty mis yog tsawg heev los yog purity ntawm cov hmoov tshauv calcium hmoov tsawg dhau lawm, thiab cov hmoov tshauv calcium hmoov nyob rau hauv cov hmoov putty hmoov yuav tsum yog. tsim nyog nce), thiab nws kuj muaj feem xyuam rau cov nqi ntawm hydroxypropyl methyl Tus nqi ntawm lub hauv paus cellulose (HPMC) muaj feem xyuam rau qhov zoo, uas yog reflected nyob rau hauv cov dej tuav tus nqi ntawm cov khoom. Cov dej tuav qis qis, thiab lub sijhawm rau cov hmoov tshauv calcium hmoov (calcium oxide hauv cov hmoov tshauv calcium hmoov tsis tag nrho hloov mus rau calcium hydroxide) tsis txaus. ,ua.
npuas
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 point
Qhov no muaj feem xyuam rau cellulose, uas muaj cov yeeb yaj kiab tsis zoo. Nyob rau tib lub sijhawm, cov impurities hauv hydroxypropyl methylcellulose (HPMC) hnov me ntsis nrog tshauv calcium. Yog tias cov tshuaj tiv thaiv hnyav, cov hmoov putty yuav nyob rau hauv lub xeev ntawm 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, cov khoom xws li hydroxypropyl methylcellulose (HPMC) tov nrog carboxymethyl pawg kuj tshwm sim hauv qhov teeb meem no.
Volcanoes thiab pinholes tshwm
Qhov no yog pom tseeb hais txog cov dej nto 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.
Tom qab lub putty dries, nws yog ib qho yooj yim rau tawg thiab tig daj
Qhov no muaj feem xyuam rau qhov sib ntxiv ntawm ntau cov hmoov tshauv-calcium hmoov. Yog tias cov hmoov tshauv-calcium ntxiv ntau dhau lawm, qhov nyuaj ntawm cov hmoov putty yuav nce ntxiv tom qab ziab. Yog tias cov hmoov putty tsis muaj qhov hloov pauv, nws yuav tawg yooj yim, tshwj xeeb tshaj yog thaum nws 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 qhov viscosity ntawm hydroxypropyl methylcellulose (HPMC) nrog tib viscosity sib 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.
Post lub sij hawm: Apr-12-2023