Cellulose ether yog ib hom non-ionic semi-synthetic siab molecular polymer. Nws muaj ob hom dej-soluble thiab hnyav-raws li cov khoom. Nws muaj cov teebmeem sib txawv hauv kev lag luam sib txawv. Piv txwv li, hauv cov khoom siv tshuaj lom neeg, nws muaj cov teebmeem hauv qab no: ①Dej-retaining agent ②Thickener ③Leveling ④Film-forming ⑤Binder; hauv kev lag luam PVC, nws yog ib qho emulsifier thiab dispersant; nyob rau hauv kev lag luam kws tshuaj, nws yog ib tug binder thiab Vim hais tias cellulose muaj ib tug ntau yam ntawm composite teebmeem, nws kuj yog cov feem ntau lug siv. Hauv qab no kuv yuav tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ethers hauv ib puag ncig cov ntaub ntawv hauv tsev.
1. Nyob rau hauv cov xim latex
Hauv kev lag luam latex xim, yuav tsum xaiv hydroxyethyl cellulose. Cov lus qhia dav dav ntawm viscosity yog RT30000-50000cps, thiab qhov siv ntau npaum li cas feem ntau yog 1.5‰-2‰. Lub luag haujlwm tseem ceeb ntawm hydroxyethyl hauv cov xim latex yog ua kom tuab, tiv thaiv cov xim gelation, pab cov xim dispersion, latex, thiab ruaj khov, thiab tuaj yeem txhim kho cov viscosity ntawm cov khoom thiab pab txhawb kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl Ethyl cellulose yooj yim dua rau kev siv. Nws tuaj yeem yaj hauv dej txias thiab dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi pH. Nws tuaj yeem siv tau ntawm tus nqi pH ntawm 2 thiab 12. Muaj peb txoj hauv qab no:
I. Ntxiv ncaj qha rau hauv ntau lawm:
Txoj kev no yuav tsum xaiv hydroxyethyl cellulose ncua hom - hydroxyethyl cellulose nrog lub sij hawm tawg ntau tshaj 30 feeb. Kev siv cov kauj ruam yog raws li nram no: ① Ntxiv ib qho dej ntshiab rau hauv lub thawv nrog lub siab-shear agitator ② Pib nplawm tsis tu ncua ntawm qhov ceev, thiab tib lub sij hawm maj mam thiab sib npaug ntxiv cov pab pawg hydroxyethyl rau hauv cov tshuaj ③ Txuas ntxiv stirring kom txog rau thaum tag nrho cov ntaub ntawv granular yog tsau los ntawm ④ Ntxiv lwm yam additives thiab alkaline additives, thiab lwm yam. ⑤ Do kom txog thaum tag nrho cov hydroxyethyl pawg tag. yaj, Ntxiv cov khoom xyaw ntxiv rau hauv daim ntawv qhia thiab zom kom txog thaum tiav.
Ⅱ. Nruab nrog niam cawv:
Txoj kev no tuaj yeem xaiv hom tam sim, thiab muaj cov nyhuv ntawm cov kab mob mildew cellulose. Qhov kom zoo dua ntawm txoj kev no yog tias nws muaj qhov yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov xim latex. Txoj kev npaj yog tib yam li cov kauj ruam ntawm ①–④.
Ⅲ. Rau kev npaj porridge zoo li cov khoom:
Txij li cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (insoluble) rau pawg hydroxyethyl, porridges tuaj yeem tsim nrog cov kuab tshuaj no. Feem ntau siv cov kuab tshuaj organic yog cov kua organic hauv cov xim pleev xim, xws li ethylene glycol, propylene glycol thiab zaj duab xis qub (xws li diethylene glycol butyl acetate). Cov porridge hydroxyethyl cellulose tuaj yeem ncaj qha ntxiv rau cov xim. Txuas ntxiv mus kom txog thaum yaj tag.
2, scraping phab ntsa putty
Tam sim no, ib puag ncig tus phooj ywg putty uas yog dej-resistant thiab txhuam-resistant nyob rau hauv ntau lub nroog nyob rau hauv kuv lub teb chaws tau yeej muaj nuj nqis los ntawm tib neeg. Nyob rau hauv ob peb xyoos dhau los, vim hais tias cov putty ua los ntawm kev tsim kho kua nplaum emits formaldehyde gas thiab puas tib neeg noj qab haus huv, kev tsim kua nplaum yog ua los ntawm polymer Nws yog npaj los ntawm acetal cov tshuaj tiv thaiv ntawm vinyl cawv thiab formaldehyde. Yog li ntawd, cov khoom siv no maj mam tshem tawm los ntawm tib neeg, thiab cov khoom siv cellulose ether series tau hloov los ntawm cov khoom siv no, uas yog hais tias, kev tsim cov khoom siv hauv tsev, cellulose tsuas yog cov khoom siv tam sim no.
Nyob rau hauv cov dej-resistant putty, nws muab faib ua qhuav hmoov putty thiab putty muab tshuaj txhuam. Ntawm ob hom putty, hloov kho methyl cellulose thiab hydroxypropyl methyl feem ntau yog xaiv. Lub viscosity specification feem ntau yog nyob ntawm 30000-60000cps. Lub luag haujlwm tseem ceeb ntawm cellulose hauv putty yog dej tuav, sib txuas thiab lubrication.
Txij li cov qauv putty ntawm ntau lub tuam txhab sib txawv, qee qhov yog cov calcium grey, lub teeb calcium, cov cement dawb, thiab lwm yam, thiab qee qhov yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li ob lub qauv xaiv cellulose specifications, viscosity thiab nkag mus. . Tus nqi ntxiv yog kwv yees li 2‰-3‰.
Nyob rau hauv kev tsim kho ntawm scraping phab ntsa putty, vim hais tias lub hauv paus nto ntawm phab ntsa muaj ib tug tej yam dej nqus dej (tus nqi nqus dej ntawm lub cib phab ntsa yog 13%, thiab cov dej nqus tus nqi ntawm cov pob zeb yog 3-5%), ua ke nrog. lub evaporation ntawm lub ntiaj teb sab nraud, yog hais tias lub putty poob dej sai heev, nws yuav ua rau cov kab nrib pleb los yog hmoov tshem tawm thiab lwm yam phenomena, yog li tsis muaj zog ntawm putty. Vim li no, ntxiv cellulose ether yuav daws tau qhov teeb meem no. Tab sis qhov zoo ntawm cov muab tub lim, tshwj xeeb tshaj yog qhov zoo ntawm cov txiv qaub calcium, kuj tseem ceeb heev. Vim hais tias cellulose muaj viscosity siab, nws kuj tseem txhim khu lub buoyancy ntawm lub putty, tsis txhob sagging thaum lub sij hawm tsim kho, thiab yog ntau xis thiab zog-txuag tom qab scraping.
3. Qhob mortar
Nyob rau hauv lub pob zeb mortar, kom ua tiav qhov kawg lub zog, cov cement yuav tsum tau hydrated kiag li, tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj sov kev tsim kho, lub pob zeb mortar poob dej sai heev, thiab cov kev ntsuas ntawm tiav hydration yog coj los tswj thiab sprinkle dej. Cov khoom siv pov tseg thiab kev ua haujlwm tsis yooj yim, qhov tseem ceeb yog cov dej tsuas yog nyob rau saum npoo, thiab cov dej hauv sab hauv tseem tsis tiav, yog li kev daws teeb meem no yog ntxiv hydroxypropyl methyl cellulose los yog methyl cellulose rau hauv mortar pob zeb. Lub viscosity specification yog nyob nruab nrab ntawm 20000-60000cps, qhov ntxiv yog hais txog 2‰-3‰, thiab cov dej tuav tus nqi yuav nce mus rau ntau tshaj 85%. Txoj kev siv hauv mortar pob zeb yog sib tov cov hmoov qhuav sib npaug thiab tom qab ntawd ntxiv dej.
4. Nyob rau hauv plastering plaster, bonding plaster thiab caulking plaster
Nrog rau kev loj hlob sai ntawm kev tsim kho kev lag luam, tib neeg qhov kev thov rau cov khoom siv hauv tsev tshiab kuj tseem nce ntxiv ib hnub. Vim muaj kev nce hauv tib neeg kev paub txog kev tiv thaiv ib puag ncig thiab kev txhim kho txuas ntxiv ntawm kev tsim kho, cov khoom siv cementitious gypsum tau tsim sai heev. Tam sim no, feem ntau cov khoom gypsum yog plastering gypsum, sib txuas gypsum, inlaying gypsum, pobzeb nplaum thiab lwm yam.
Stucco plaster yog ib yam khoom zoo ntawm plastering rau sab hauv phab ntsa thiab ru tsev. Cov phab ntsa plastered nrog nws zoo thiab du, tsis txhob poob hmoov, daim ntawv cog lus ruaj khov rau lub substrate, tsis muaj qhov tawg thiab poob tawm, thiab muaj hluav taws kub; Kev sib txuas plaster yog ib hom plaster. Ib hom tshiab ntawm lub tsev lub teeb board nplaum yog cov khoom nplaum ua los ntawm gypsum ua cov khoom siv hauv paus thiab ntxiv ntau yam khoom ntxiv. Nws yog tsim rau kev sib txuas ntawm ntau yam khoom siv hauv tsev inorganic. Nws yog non-toxic, tasteless, Nws muaj cov yam ntxwv ntawm lub zog thaum ntxov, ceev ceev thiab muaj zog kev sib raug zoo, thiab yog ib qho kev txhawb nqa khoom siv rau kev tsim vaj tsev boards thiab blocks;
Cov khoom lag luam gypsum no muaj ntau txoj haujlwm sib txawv, ntxiv rau lub luag haujlwm ntawm gypsum thiab lwm yam muab tub lim, qhov teeb meem tseem ceeb yog qhov ntxiv cellulose ether auxiliary plays lub luag haujlwm tseem ceeb. Txij li thaum gypsum muab faib ua anhydrite thiab hemihydrate gypsum, qhov sib txawv gypsum muaj qhov sib txawv ntawm cov khoom lag luam, yog li thickening, dej tuav thiab retardation txiav txim siab qhov zoo ntawm gypsum cov ntaub ntawv hauv tsev. Cov teeb meem tshwm sim ntawm cov ntaub ntawv no yog hollow cracking, thiab pib lub zog tsis tuaj yeem ncav cuag. Yuav kom daws tau qhov teeb meem no, nws yog qhov teeb meem ntawm kev xaiv hom cellulose thiab kev siv cov khoom sib xyaw ua ke ntawm cov retarder. Hauv qhov no, methyl lossis hydroxypropyl methyl 30000 feem ntau xaiv. -60000cps, qhov sib ntxiv yog nyob nruab nrab ntawm 1.5‰-2‰, qhov tseem ceeb ntawm cellulose yog dej tuav, retardation thiab lubrication.
Txawm li cas los xij, nws tsis tuaj yeem cia siab rau cellulose ether ua tus retarder, thiab nws yog ib qho tsim nyog yuav tsum tau ntxiv citric acid retarder los sib tov thiab siv nws kom lub zog thawj zaug yuav tsis cuam tshuam.
Dej tuav tus nqi feem ntau yog hais txog kev poob dej hauv qhov tsis muaj dej sab nraud. Yog tias cov phab ntsa qhuav heev, cov dej nqus dej thiab cov evaporation ntawm lub hauv paus yuav ua rau cov khoom poob dej sai heev, thiab hollowing thiab cracking yuav tshwm sim.
Txoj kev siv no yog tov nrog cov hmoov qhuav. Yog tias muaj kev daws teeb meem, thov xa mus rau txoj kev npaj ntawm cov tshuaj.
5. Rwb thaiv tsev mortar
Thermal rwb thaiv tsev mortar yog ib yam tshiab ntawm sab hauv phab ntsa thermal rwb thaiv tsev cov ntaub ntawv nyob rau hauv sab qaum teb cheeb tsam. Nws yog cov khoom siv phab ntsa uas muaj cov khoom siv thermal rwb thaiv tsev, mortar thiab binder. Hauv cov khoom no, cellulose plays lub luag haujlwm tseem ceeb hauv kev sib txuas thiab ua kom muaj zog. Feem ntau xaiv methyl cellulose nrog viscosity siab (kwv yees li 10000eps), qhov ntau npaum li cas feem ntau ntawm 2‰-3‰), thiab txoj kev siv yog qhuav hmoov sib tov.
6. Tus neeg saib xyuas interface
Tus neeg saib xyuas interface yog HPNC20000cps, thiab cov nplais nplaum yog ntau tshaj 60000cps. Nyob rau hauv lub interface tus neeg sawv cev, nws yog tsuas yog siv raws li ib tug thickener, uas yuav txhim khu lub tensile lub zog thiab xub tsis kam.
Post lub sij hawm: Nov-02-2022