Putty yog ib qho khoom siv ntau yam hauv kev tsim kho, kho tsheb, thiab ntau yam kev lag luam. Txawm li cas los xij, nws ruaj khov, tshwj xeeb yog hais txog cohesion thiab adhesion, tuaj yeem yog qhov teeb meem hauv qee cov ntawv thov. Cov ntawv no tshawb nrhiav kev hloov hydroxyethyl cellulose (MHEC) raws li kev ntxiv ntxiv los txhim kho kev ruaj khov ntawm putty formulations. MHEC yog lub cellulose derivative nrog cov khoom sib txawv thiab cov khoom nplaum uas txhim kho puty kev ua haujlwm.
Putty yog cov khoom siv uas siv tau siv hauv kev tsim kho, kho tsheb, thiab ntau yam kev lag luam, thiab muaj peev xwm sau qhov khoob thiab tsis xwm yeem. Txawm li cas los xij, qhov ruaj khov ntawm lub putty, tshwj xeeb nws cohesive thiab nplaum cov khoom, yog qhov tseem ceeb los xyuas kom nws cov kev siv ua kom sib txawv. Ntau yam, xws li cov xwm txheej ib puag ncig, substrate cov khoom thiab tsim cov khoom xyaw, tuaj yeem cuam tshuam ua rau muaj kev ruaj khov.
Nyob rau hauv xyoo tsis ntev los no, tau muaj kev txaus siab tshaj plaws hauv kev tshawb nrhiav ntxiv los txhim kho kev ua kom muaj kev ruaj khov thiab ua haujlwm. Ib qho ntxiv no ntxiv yog hloov hydroxyethyl cellulose (MHEC), ib lub cellulose derivitive paub rau nws cov khoom sib txawv thiab cov khoom nplaum.
Tso cov khoom ruaj khov: cov ntsiab lus thiab cov nyom
PUTTY STURANTION yog hais txog nws lub peev xwm los tswj nws lub cev siv zog thiab cov kws kho tshuab dhau lub sijhawm, tshwj xeeb nyob rau hauv ntau yam kev mob ib puag ncig thiab kev ntxhov siab. Qhov ruaj khov ntawm putty yog cuam tshuam los ntawm ntau yam ntawm ntau yam, suav nrog nws cov kev coj ua, ua rau muaj kev tawm tsam, thiab kev ua kom tawg lossis ziab.
Rheological cov khoom ua si lub luag haujlwm tseem ceeb hauv kev txiav txim siab ua rau muaj kev ruaj khov. Lub putty yuav tsum muaj viscosity tsim nyog thiab tawm los ntawm kev ntxhov siab kom ntseeg tau yooj yim daim ntawv thov thiab adhesion mus rau substrate. Tsis tas li ntawd, cov cwj pwm viscotropic (lub viscosity ntawm cov zaub txo qis hauv qab kev ntxhov siab thiab rov qab ua haujlwm tom qab kev ntxhov siab tau tsis zoo) yog qhov zoo rau kev txhim kho cov txheej txheem thiab sag tsis kam.
Adhesion yog lwm qhov tseem ceeb ntawm putty stability raws li nws txiav txim siab yuav ua li cas zoo kawg nkaus li cas cov putty yuav muab rau ntau yam ntoo xws li ntoo, hlau lossis pob zeb. Cov kua nplaum txom nyem tuaj yeem ua rau lub putty rau delaminate los yog tev deb ntawm lub substrate, hloov pauv qhov tseeb ntawm kev kho saum npoo. Ib qho ntxiv, cov zaub yuav tsum tau ua kom zoo sib xyaw kom tswj tau nws cov qauv txheej txheem kev ncaj ncees thiab tiv thaiv sagging los yog kev sib tsoo thaum thov thiab kho.
Qhov kev sib tw hauv kev ua tiav rau kev ua kom pom kev zoo nrog kev nrhiav cov khoom muaj nuj nqis, thaum noj rau cov kev cai sib txawv thiab ib puag ncig. Yog li ntawd, kev nce qib tshiab xws li qhov sib ntxiv ntawm kev zam haum xws li MHEC xav tau kom muaj kev ruaj khov txhim khu kev ruaj khov ntawm putties.
Lub Sijhawm Post: Feb-19-2025