Thaum peb siv cov hmoov ua kom muaj hmoov, yuav tsum muaj qee yam teeb meem, yog li peb tsis paub tias yog vim li cas. Kuv xav tias yuav tsum muaj xya hom teeb meem uas feem ntau tshwm sim hauv cov hmoov ua kom muaj.
Ib qho: ua nws nrawm. Qhov no yog tsuas yog cuam tshuam nrog kev ntxiv ntawm cov tshuaj calcium thiab dej rov ua dua ntawm cov fiber, thiab tseem muaj feem xyuam rau qhov ziab khaub ncaws.
Ob: tev thiab yob. Qhov no cuam tshuam nrog cov dej khaws cia, uas yooj yim tshwm sim thaum lub viscosity ntawm cellulose yog tsawg lossis tus nqi ntawm kev ntxiv me me.
Peb: hmoov tshem tawm. Qhov no cuam tshuam nrog tus nqi ntawm cov av calcium ntxiv ntxiv, thiab nws kuj cuam tshuam nrog tus nqi thiab kev yeem ntawm cellulose ntxiv. Nws tau xav txog hauv cov dej tswj cov khoom lag luam. Cov dej tuav cia qis dua yog tsawg thiab dej hiav txwv ntawm cov hmoov tshauv calcium tsis txaus.
Plaub: Blistering. Qhov no muaj feem xyuam rau cov av noo qhuav thiab tiaj ntawm phab ntsa, thiab nws tseem muaj feem xyuam rau kev tsim kho.
Tsib: Tus PIN taw tes tshwm. Qhov no muaj feem xyuam rau cellulose, uas muaj cov yeeb yaj kiab tsis zoo ua cov khoom. Nyob rau tib lub sijhawm, cov impurities nyob rau hauv cellulose kev tshwm sim me ntsis nrog cov hmoov av av calcium. 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 cov pab pawg carboxyl ntxiv rau lub cellulose.
Rau: lub roob hluav taws thiab cov qhov pom me me tshwm. Qhov no yog qhov tseeb hais txog cov dej saum npoo nro ntawm hydroxypropy cov tshuaj, tab sis cov dej saum npoo ntawm hydroxyeth daws tsis pom tseeb. Nws yuav zoo dua los ua kev kho lub teeb.
Xya: Tom qab lub putty yog qhuav, nws yog ib qho yooj yim kom tawg thiab tig daj. Qhov no muaj feem xyuam rau kev sib ntxiv ntawm cov nyiaj calcium loj loj. Yog tias tus nqi ntawm grey calcium ntxiv ntau dhau, lub hardness ntxiv, lub hardness ntau dhau ntawm cov hmoov putty yuav nce ntxiv tom qab ziab. Tsuas yog lub hardness thiab tsis muaj kev hloov pauv yuav yooj yim tawg, tshwj xeeb tshaj yog thaum nws raug rau sab nraud. Nws tseem muaj feem xyuam rau cov ntsiab lus siab ntawm calcium oxide hauv grey calcium.
1. Vim li cas cov hmoov zaub putty ua thinner tom qab ntxiv dej?
Cellulose ether yog siv los ua cov tuab thiab dej-khaws tus 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.
2. 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.
3. Vim li cas cov putty thiab coll ua ntawm cellulose nrog tib viscosity muaj kev sib txawv nyob rau lub caij ntuj no thiab lub caij ntuj sov?
Vim yog lub thermal gelation ntawm cov khoom, lub viscosity ntawm cov khoom yuav maj mam poob 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 viscos loj dua thaum thov cov khoom nyob rau lub caij ntuj sov, lossis xaiv cov khoom siv nrog cov khoom kub siab dua
Lub sij hawm Post: Tsib Hlis-22-2023