1. Cov teeb meem uas muaj nyob hauv Putty hmoov
Kev ziab khaub ncaws nrawm yog qhov ntau ntawm cov hmoov tshauv ntxiv ntxiv (cov hmoov av ntau ntxiv rau cov dej tsis yeem siv ntawm cov roj ntsha, thiab nws tseem muaj feem xyuam rau lub dryness ntawm phab ntsa.
Peeling thiab Curling yog cuam tshuam rau cov dej khaws cia, uas yooj yim tshwm sim thaum lub viscosity ntawm cellulose yog tsawg lossis tus nqi ntawm kev ntxiv me me.
Cov hmoov tshem tawm ntawm phab ntsa sab hauv Putty muaj feem xyuam nrog tus nqi ntawm cov hmoov av calcium hmoov ntau dhau, thiab cov hmoov tshauv dhau Calcium hmoov nyob rau hauv lub putty hmoov mis yuav tsum muaj nce ntxiv). Nyob rau tib lub sijhawm, nws tseem muaj feem xyuam rau tus nqi thiab kev yeem zoo ntawm cellulose, uas tau cuam tshuam hauv dej khaws cia ntawm cov khoom. Cov dej tuav cia qis qis, thiab lub sijhawm rau cov hmoov av ntsuab (calcium oxide hauv cov hmoov av calcium hmoov tshwm sim.
Foaming yog cuam tshuam nrog cov av noo thiab tiaj tus ntawm phab ntsa, thiab nws tseem muaj feem xyuam rau kev tsim kho.
Cov tsos ntawm pinpoints muaj feem xyuam rau cellulose, uas muaj kev ua yeeb yaj kiab zoo-ua cov khoom. Nyob rau tib lub sijhawm, impurities nyob rau hauv cellulose kev tshwm sim me ntsis nrog cov hmoov av ntsuab. Yog tias cov tshuaj tiv thaiv yog qhov hnyav, cov hmoov puty yuav tshwm sim hauv lub xeev ntawm taum curd residue. Nws tsis tuaj yeem muab tso rau ntawm phab ntsa, thiab nws tsis muaj cohesive quab yuam nyob rau tib lub sijhawm. Tsis tas li ntawd, qhov xwm txheej no tseem muaj tshwm sim nrog cov khoom lag luam xws li Carboxymethyl mixed nrog cellulose.
Craters thiab pinholes tshwm sim. Qhov no yog qhov tseeb hais txog cov dej saum npoo nro ntawm hydroxypropyl methylulose auelyhoonous. Lub rooj dej nro ntawm hydroxyethyl aque kua tsis pom tseeb. Nws yuav zoo rau ua kev kho tiav.
Tom qab cov putty dries, nws yog ib qho yooj yim kom tawg thiab tig daj. Qhov no muaj feem xyuam rau kev sib ntxiv ntawm cov nyiaj ntau ntawm cov hmoov tshauv. Yog tias cov nyiaj ntawm cov hmoov tshauv tshauv yog ntxiv ntau dhau, lub hardness ntau dhau, lub hardness ntawm cov hmoov putty yuav nce tom qab ziab. Yog tias cov hmoov putty tsis muaj kev hloov pauv tau, nws yuav tawg yooj yim, tshwj xeeb tshaj yog thaum nws raug rau sab nraud. Nws tseem muaj feem xyuam rau cov ntsiab lus ntau ntawm calcium oxide hauv cov hmoov tshauv calcium hmoov.
2. Vim li cas cov hmoov zaub putty ua thinner tom qab ntxiv dej?
Cellulose yog siv los ua cov tuab thiab dej-khaws cov neeg sawv cev hauv lub putty. Vim yog thixotrotropy ntawm cellulose ntawm cellulose ntawm cellulose hauv cov hmoov putty hauv kuj ua rau thixotropy tom qab ntxiv dej rau lub putty. Qhov no thixotropy yog tshwm sim los ntawm kev puas tsuaj ntawm cov qauv sib xyaw ua ke ntawm cov khoom sib xyaw ua ke hauv cov hmoov noj. Tus qauv no tshwm sim ntawm so thiab tawg poob qis hauv kev ntxhov siab. Uas yog hais, viscosity txo hauv qab nplawm, thiab viscosity rov qab thaum sawv twj ywm.
3. Dab tsi yog vim li cas vim li cas lub putty yog tus hnyav hauv cov txheej txheem scraping?
Hauv qhov no, lub viscosity ntawm cellulose feem ntau siv yog siab heev. Qee cov tuam ntxhab siv 200,000 cellulose los ua kom muaj. Lub putty tsim nyob rau hauv txoj kev no muaj siab viscosity, yog li nws pom hnyav thaum scraping. Qhov pom zoo ntawm PUTTY rau phab ntsa sab hauv yog 3-5 kg, thiab viscosity yog 80,000-100,000.
4. Vim li cas tib lub viscosity cellulose xav txawv nyob rau lub caij ntuj no thiab lub caij ntuj sov?
Vim yog lub thermal gelation ntawm cov khoom, lub viscosity ntawm lub putty thiab tshuaj khib yuav maj mam txo qis nrog qhov ntsuas kub. Thaum qhov kub tshaj qhov kub tshaj ntawm cov khoom, cov khoom yuav tau precipitated los ntawm dej thiab poob nws viscosity. Chav nyob kub nyob rau lub caij ntuj sov feem ntau yog tshaj 30 degrees, uas yog ntau txawv ntawm qhov kub nyob rau lub caij ntuj no, yog li cov viscosity yog qis dua. Nws raug nquahu kom xaiv cov khoom lag luam nrog cov viscosity ntau dua thaum thov cov khoom hauv lub caij ntuj sov, lossis kom xaiv cov khoom siv nrog cov khoom siv kub siab dua. Sim tsis txhob siv methyl cellulose nyob rau lub caij ntuj sov. Qhov kub thiab txias yog nruab nrab ntawm 55 degrees, yog tias qhov kub me me dua, nws viscosity yuav muaj cuam tshuam heev.
Lub Sijhawm Post: Lub Tsib Hlis-04-2023