Tib lub sijhawm, nws tuaj yeem txhim kho lub zog compressive thiab shear zog ntawmHPMC hydroxypropyl methyl cellulose, txhim kho qhov tseeb ntawm kev tsim kho engineering, txhim kho kev ua haujlwm. HPMC hydroxypropyl methyl cellulose tuaj yeem txhim kho lub zog nplaum ntawm cov hmoov putty, txo qhov xwm txheej ncua, kom ntseeg tau tias kev ua tiav ntawm kev tsim kho engineering. Hydroxypropyl methyl cellulose tuaj yeem ua rau lub sijhawm khiav thiab daws qhov teeb meem ntawm qhov khoob thiab tsis txaus lub zog compressive thawj hauv cov txheej txheem tsim kho engineering.
Qhov kev ua tau zoo ntawm cov tshuaj mortar thiab putty mortar uas tiv thaiv dej tau zoo ua rau cov pob zeb sib xyaw tau zoo, thiab tuaj yeem txhim kho lub zog sib txuas ntawm cov tshuaj mortar. Tib lub sijhawm, lub zog compressive thiab shear ntawm hydroxypropyl methyl cellulose tuaj yeem txhim kho tau zoo kom txhim kho qhov cuam tshuam ntawm kev tsim kho engineering thiab txhim kho kev ua haujlwm.
Tsis kam dej noo,HPMChydroxypropyl methyl cellulose, cov nyhuv ntawm hydroxypropyl methyl cellulose hauv cov hmoov putty, kom tiv thaiv kev qhuav thiab ziab los ntawm cov dej ntws tawm sai dhau. Hydroxypropyl methyl cellulose tuaj yeem txhim kho lub zog nplaum ntawm cov hmoov putty, txo qhov xwm txheej ncua, xyuas kom meej tias kev tsim kho engineering ua tiav.
Tus yuam sij HPMC hydroxypropyl methyl cellulose nrog dej xauv, thickening, wetting thiab lwm yam teebmeem, thickening, wetting thiab lwm yam teebmeem muaj qee qhov teeb tsa pib. Hydroxypropyl methyl cellulose tuaj yeem ua rau lub sijhawm khiav ntev dua thiab daws qhov teeb meem ntawm hollow thiab tsis txaus lub zog compressive thawj zaug hauv cov txheej txheem kev tsim kho engineering.
HPMC hydroxypropyl methyl cellulose hauv cov phab ntsa rwb thaiv tsev mortar ua lub luag haujlwm tseem ceeb hauv kev sib txuas, thiab txhim kho lub zog compressive ntawm cov khoom siv raw. Mortar yooj yim heev rau npog, txhim kho kev ua haujlwm, nrog rau lub luag haujlwm tseem ceeb ntawm kev ncua kev ntws thiab kev ua tau zoo. Kev ua haujlwm ntawm dej-locking ntawm hydroxypropyl methyl cellulose tuaj yeem ua rau lub sijhawm khiav ntawm mortar, txhim kho kev tiv thaiv kev sib sau ua ke thiab kev sib txuas, txhim kho qhov zoo ntawm qhov chaw, thiab txhim kho lub zog compressive ntawm kev sib txuas.
Cov tshuaj nplaum uas yaj tau hauv dej ua rau cov vuas hauv pem teb thiab lub hauv paus tsis tas yuav tsum tau ntub dej lossis ntub dej ua ntej, ua rau lub zog sib txuas ntawm cov vuas hauv pem teb zoo dua. Lub sijhawm tsim kho cov vuas hauv pem teb ntev, ua tib zoo, sib npaug, yooj yim rau kev tsim kho, thiab tiv taus dej noo zoo.
Hauv kev lag luam ntawm cov txheej txheem tsim kho vaj tse latex ntuj, hydroxypropyl methyl cellulose tuaj yeem siv ua tus neeg sawv cev tsim zaj duab xis, tackifier, demulsifier thiab thickener, yog li ntawd cov zaj duab xis yas muaj kev tiv thaiv kev hnav zoo dua, fluidity thiab adhesion. Lub pH siv los txhim kho kev sib txhuam ntawm qhov chaw tau txhais zoo, thiab qhov sib xyaw nrog cov kua organic zoo thiab muaj kev du zoo.
Kev txhim kho kev lag luam Cov txheej txheem architectural muaj lub zog zoo, dej permeability zoo heev thiab tiv taus kev laus zoo. Cov qauv tsim cov txheej txheem txheej txheem pob zeb tiag tiag yog qhov tseem ceeb heev. Ib tuj ntawm cov lacquer zoo yog tsim los ntawm kwv yees li 300KG ntshiab styrene-acrylic emulsion, 650KG ntshiab pob zeb ntuj dej kua thiab lwm yam khoom. Cov lacquers zoo tiag tiag yog tus cwj pwm los ntawm ntau cov tshuaj pleev kom noo noo. Thaum cov kua sib xyaw ntawm cov emulsion yog 50%, qhov ntim ntawm 300KG moisturizing emulsion tom qab ziab yog li 150 litres, thiab qhov ntim ntawm 650KG xuab zeb hnyav yog li 228 litres. Uas yog hais tias, hauv qhov no, cov xim pob zeb tiag tiag (xim nplaum concentration tus nqi) yog 60%. Vim yog qhov loj me me thiab cov tsos tsis xwm yeem ntawm cov xuab zeb zoo, nyob rau hauv lub hauv paus ntawm qee qhov kev tshuaj xyuas qhov loj me me, cov txheej txheem phab ntsa sab nraud qhuav yuav nyob ib puag ncig CPVC concentration tus nqi).
Rau cov viscosifier, yog tias xaiv cov cellulose viscosity tsim nyog, txheej txheej sab nraud tuaj yeem tsim cov xim pleev kom ntxaws dua, ntau dua, txhawm rau ua tiav peb qhov kev cai ntawm txheej txheej sab nraud. Peb txoj cai rau kev tsim kho tsev. Qhov tseeb, daim ntawv thov ntawm ntau yam kev lag luam thiab kev siv tau zoo ntawm pob zeb qi, ib tuj ntawm cov tshuaj zas zais cia 100-160kg, 750kg xim phaj xuab zeb, 20kg (suav nrog cov tshuaj ntxiv, tshuaj tua kab, fungicides, nplaum, thiab lwm yam), cov dej seem thiab cov khoom tu tawv nqaij. Hom pob zeb tiag tiag no PVC feem ntau nyob nruab nrab ntawm 75%? Nruab nrab ntawm 85%, thaum lub sijhawm ua haujlwm tau qhuav, txheej txheej pob zeb tiag tiag nyuaj rau tsim kom muaj txheej xim kom ntxaws thiab nruj. Yog li ntawd, yuav ua li cas siv tag nrho cov tshuaj emulsion moisturizing tsawg dua, kom txheej txheej kom deb li deb tau symmetrical.
Cov txheej txheem pob zeb tiag tiag muaj cov yam ntxwv ntawm viscosity qis (qhov hnyav molecular siab). Vim yog qhov nce ntawm tus nqi ntawm cov khoom lag luam cellulose, qhov viscosity ntawm cov cellulose siv tau hloov pauv ntawm 30000 mus rau 50000,80000,100000, txawm tias nws tau nce los ntawm 200000, lub hom phiaj yog kom txo tag nrho cov cellulose los ntawm methyl cellulose (HEC) mus rau hydroxyl acrylic cellulose (HPMC); Kev siv methyl methyl cellulose HPMC yuav txo qhov dej tsis kam ntawm cov xim tsev pob zeb tiag tiag, thiab tom qab ntawd txhim kho qhov viscosity ntawm cellulose (qhov hnyav molecular) yuav yog qhov xaus lus ntawm kev ua tau zoo ntawm cov khoom lag luam xim tsev pob zeb tiag tiag? Cov lus teb yog tias qhov kev ua tau zoo ntawm cov txheej xim pob zeb yuav phem zuj zus!
HPMC muaj peev xwm muab faib ua hom uas yaj tau sai thiab hom uas yaj tau thaum kub. Thaum cov dej txias tawg sai thiab poob rau hauv dej, HPMC muaj peev xwm muab faib ua hom uas yaj tau sai thiab hom uas yaj tau thaum kub. Lub sijhawm no, cov kua tsis muaj viscosity, vim HPMC tsuas yog tawg hauv dej xwb, thiab tsis muaj qhov xav tias yaj tau tiag tiag. Tom qab li 2 feeb, qhov viscosity ntawm cov kua yuav nthuav dav qeeb qeeb, ua rau cov kua colloid viscous pob tshab. Thaum cov khoom siv organic solvent kub sib sau ua ke hauv dej txias, lawv tuaj yeem tawg sai hauv dej kub thiab yaj hauv dej kub. Thaum qhov kub ntawm ib puag ncig raug txo qis rau qee qib ntawm qhov kub, qhov viscosity yuav maj mam tshwm sim kom txog thaum cov kua colloidal viscous pob tshab tag nrho tau tsim. Hom tshuaj organic thermal tsuas yog siv rau hauv cov hmoov putty sab hauv phab ntsa thiab mortar. Hauv cov kua superglue thiab coatings, muaj cov pej xeem uas tsis tuaj yeem siv tau. Hom uas yaj tau sai muaj pawg siv dav dav. Siv tau ua hmoov putty sab hauv phab ntsa thiab mortar, thiab nws cov kua superglue thiab coatings. Tsis muaj kev txwv.
Dej kub yaj: vim HPMC hauv dej kub tsis yaj, yog li HPMC hauv qhov txuas qub tuaj yeem sib npaug hauv dej kub, thiab tom qab ntawd yaj sai thaum txias. Ob txoj hauv kev classical tau piav qhia raws li hauv qab no:
1) Muab cov dej kub uas koj xav tau rau hauv lub nkoj thiab ua kom sov txog li 70 ℃. Maj mam sib tov, maj mam ntxiv hydroxypropyl methyl cellulose, maj mam HPMC ntab rau ntawm tus dej, tom qab ntawd maj mam tsim cov sludge refrigeration sludge hauv qhov sib tov.
2) Ntxiv 1/3 lossis 2/3 ntawm cov dej rau hauv lub nkoj, ua kom sov rau 70 ℃, ua kom sov rau 70 ℃ kom tawg HPMC, thiab npaj cov dej kub sludge; Cov dej txias seem tom qab ntawd raug ntxiv rau cov sludge kub thiab sib xyaw nrog cov khoom sib xyaw tom qab txias.
Txoj kev sib tov hmoov: HPMC hmoov nrog lub tshuab sib tov thiab ntau lwm yam khoom xyaw hmoov sib tov txaus, tom qab ntawd ntxiv dej kom yaj. Lub sijhawm no, HPMC tuaj yeem yaj tau yog tias tsis muaj kev sib sau ua ke, vim tias txhua lub ces kaum me me tsuas yog me ntsis HPMC hmoov, thaum dej yuav yaj tam sim ntawd - hom kev no tsuas yog siv rau cov hmoov putty sab hauv phab ntsa thiab cov chaw tsim khoom mortar. [HPMC] ua tus neeg sawv cev tackifying thiab tus neeg sawv cev moisturizing hauv putty mortar ntawm phab ntsa sab hauv.
Qhov no yog ib qho kua muag cuav hydroxypropyl methyl cellulose (HMPC), uas nyob ze rau cov khoom viscoelastic (feem ntau yog mucin) hauv kua muag. Nws lo rau ntawm qhov muag los ntawm kev nqus ntawm polymer, thiab ua lub luag haujlwm ntawm conjunctival mucin, yog li txhim kho qhov xwm txheej txo qis ntawm mucin hauv lub qhov muag thiab ua kom cov dej noo ntawm lub cornea nce ntxiv.
Hauv cov hmoov putty, thickening, dej khaws cia thiab kev tsim kho muaj peb lub luag haujlwm. Thickening, cellulose tuaj yeem thickened rau suspension, yog li cov tshuaj tseem sib xws nce thiab nqis lub luag haujlwm ntawm anti-flow dai. Dej khaws cia: ua kom cov hmoov putty qhuav qeeb qeeb, pab calcium grey hauv kev ua haujlwm ntawm dej tshuaj tiv thaiv. Kev tsim kho: cellulose lubrication, tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo. HPMC tsis koom nrog hauv kev tshuaj tiv thaiv, tab sis tsuas yog ua lub luag haujlwm txhawb nqa.
Cov xim pleev xim muaj ntau yam kev xaiv xim, thiab tuaj yeem ua tiav qhov zoo tshaj plaws ntawm kev tsim qauv kos duab, thiab cov xim pob zeb tiag tiag hauv kev nrhiav qhov zoo li ntuj, zoo dua li cov xim pleev xim, txhua tus muaj nws lub zog. Cov xim pleev xim thiab lacquer hauv cov txheej txheem ntau lawm, txhawm rau kom khaws cov xim qub tas mus li, feem ntau hauv cov txheej txheem kawg, peb yuav tsum siv cov roj pleev xim (roj sib dua) los tsuag kom tiv thaiv lawv cov nyhuv kos duab lossis cov nyhuv pob zeb.
Lacquer, xim pleev xim yog ib hom xim pleev, feem ntau yog siv rau kev kho kom zoo nkauj phab ntsa. Lub vev xaib official ntawm cov av diatom ntuj tau piav qhia txog qee qhov sib txawv ntawm cov xim pleev xim thiab lacquer, xim pleev xim thiab lacquer sib txawv txoj kev, cov hauv qab no yog cov lus qhia tshwj xeeb kom pom qhov sib txawv ntawm lacquer thiab xim pleev xim.
Cov roj hmab zoo nkauj kim heev, cov chaw tsim khoom kom txuag tau nqi, tsuas yog ntxiv me ntsis ntawm cov emulsion, tom qab ua cov xim pob zeb qhuav zaj duab xis xoob, tsis txaus ntom, zaj duab xis xim yog bibulous tus nqi loj dua, lub zog compressive txo qis, thaum ntsib huab cua los nag ntev, nag yuav nkag mus rau hauv zaj duab xis xim, tiag tiag xim pob zeb dawb.
Qee cov chaw tsim khoom hauv kev tsim cov lacquer, feem ntau ntxiv ntau carboxymethyl cellulose, hydroxyethyl cellulose ua cov thickener, cov tshuaj no yog cov dej-soluble lossis hydrophilic, txheej zaj duab xis tshuav nyob rau hauv txheej, zoo heev txo qhov dej tsis kam ntawm cov txheej.
Lub sijhawm tshaj tawm: Lub Rau Hli-09-2022