Cellulose ether yog non-ionic semi-synthetic siab molecular polymer, uas yog dej-soluble thiab hnyav-soluble. 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:
① Dej tuav tus neeg saib xyuas ②Thickener ③Leveling cuab yeej ④Film tsim khoom ⑤Binder
Hauv kev lag luam polyvinyl chloride, nws yog emulsifier thiab dispersant; nyob rau hauv kev lag luam kws tshuaj, nws yog ib tug binder thiab ib tug qeeb thiab tswj cov ntaub ntawv tso tawm lub moj khaum, thiab lwm yam. Vim hais tias cellulose muaj ib tug ntau yam ntawm composite cov teebmeem, nws daim ntawv thov ntawm lub teb kuj yog feem ntau nws kim heev. Cov hauv qab no tsom rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.
(1) latex xim:
Hauv kev lag luam latex xim, xaiv hydroxyethyl cellulose, cov lus qhia dav dav ntawm qhov sib npaug ntawm cov viscosity yog RT30000-50000cps, uas sib haum rau cov lus qhia ntawm HBR250, 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 gelation ntawm cov xim, pab kev tawg ntawm cov xim, kev ruaj ntseg ntawm cov latex, thiab ua kom cov viscosity ntawm cov khoom, uas ua rau kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yog yooj yim dua los 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 zoo ntawm PI tus nqi 2 thiab 12. Cov txheej txheem ntawm kev siv yog raws li hauv qab no:
I. Ntxiv ncaj qha rau hauv ntau lawm: txoj kev no yuav tsum xaiv hydroxyethyl cellulose ncua hom, thiab cov hydroxyethyl cellulose nrog lub sij hawm dissolution ntau tshaj 30 feeb, nws cov kauj ruam siv yog raws li nram no:
① Npaj kom muaj nuj nqis ntawm cov dej ntshiab huv hauv lub thawv nrog lub tshuab hluav taws xob siab
② Pib do tsis tu ncua ntawm qhov ceev, thiab tib lub sijhawm maj mam ntxiv hydroxyethyl rau cov tshuaj sib npaug
③ Txuas ntxiv mus kom txog thaum tag nrho cov ntaub ntawv granular yog tsau
④ Ntxiv lwm yam additives thiab yooj yim additives, thiab lwm yam.
⑤ Do kom txog thaum tag nrho cov pawg hydroxyethyl yaj tag, tom qab ntawd ntxiv lwm cov khoom xyaw hauv cov mis, thiab zom kom txog thaum cov khoom tiav.
Ⅱ. Nruab nrog niam cawv rau kev siv tom qab: Txoj kev no tuaj yeem xaiv cov cellulose instant, uas muaj cov nyhuv anti-mildew. 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 ①-④.
Ⅲ. Npaj porridge rau kev siv tom qab: Txij li cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (insoluble) rau hydroxyethyl, cov kuab tshuaj no tuaj yeem siv los npaj porridge. Feem ntau siv cov kuab tshuaj organic yog cov kua organic hauv cov xim pleev xim, xws li ethylene glycol, propylene glycol, thiab cov neeg ua yeeb yaj kiab (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) Hauv phab ntsa scraping putty:
Tam sim no, nyob rau hauv ntau lub nroog hauv kuv lub teb chaws, cov dej-resistant thiab txhuam-resistant ib puag ncig-phooj ywg putty tau pib muaj nuj nqis los ntawm tib neeg. Nws yog tsim los ntawm acetal cov tshuaj tiv thaiv ntawm vinyl cawv thiab formaldehyde. Yog li ntawd, cov khoom no maj mam tshem tawm los ntawm tib neeg, thiab cov khoom siv cellulose ether yog siv los hloov cov khoom siv no. Qhov ntawd yog hais tias, rau kev tsim cov khoom siv hauv tsev, cellulose yog tam sim no tsuas yog cov khoom siv.
Nyob rau hauv dej-resistant putty, nws muab faib ua ob hom: qhuav hmoov putty thiab putty muab tshuaj txhuam. Ntawm ob hom putty, hloov kho methyl cellulose thiab hydroxypropyl methyl yuav tsum raug xaiv. Lub viscosity specification feem ntau yog nyob nruab nrab 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 cov specifications, viscosity thiab nkag mus ntawm cellulose nyob rau hauv lub ob tug qauv kuj txawv. Tus nqi ntxiv yog li 2‰-3‰. Nyob rau hauv kev tsim kho ntawm phab ntsa scraping putty, txij li thaum lub hauv paus nto ntawm phab ntsa muaj ib tug tej yam degree ntawm nqus dej (qhov nqus dej ntawm phab ntsa cib yog 13%, thiab cov dej nqus tus nqi ntawm cov pob zeb yog 3-5%), ua ke nrog cov evaporation ntawm lub ntiaj teb sab nraud, yog hais tias lub putty poob dej sai heev, Nws yuav ua rau tawg los yog hmoov tshem tawm, uas yuav ua rau lub zog ntawm putty tsis muaj zog. Yog li ntawd, 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 hmoov tshauv calcium kuj tseem ceeb heev.
Vim lub siab viscosity ntawm cellulose, lub buoyancy ntawm lub putty kuj txhim kho, thiab sagging tshwm sim thaum lub sij hawm tsim kho kuj zam, thiab nws yog ntau xis thiab zog-txuag tom qab scraping. Nws yog qhov yooj yim dua los ntxiv cellulose ether hauv cov hmoov putty. Nws ntau lawm thiab siv tau yooj yim dua. Cov muab tub lim thiab cov khoom ntxiv tuaj yeem sib xyaw ua ke hauv cov hmoov qhuav.
(3) Pob zeb mortar:
Nyob rau hauv pob zeb mortar, kom ua tiav lub zog kawg, cov cement yuav tsum tau hydrated tag nrho. 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 siv 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 yim cov dej tuav cov neeg ua haujlwm rau cov pob zeb zeb, feem ntau xaiv hydroxypropyl methyl. los yog methyl Cellulose, viscosity specification yog nyob nruab nrab ntawm 20000-60000cps, thiab cov nyiaj ntxiv yog 2%-3%. Cov dej tuav tus nqi tuaj yeem nce mus rau ntau dua 85%. Txoj kev siv hauv mortar pob zeb yog sib tov cov hmoov qhuav sib npaug thiab hliv rau hauv dej.
(4) Nyob rau hauv plastering gypsum, bonded gypsum, caulking gypsum:
Nrog txoj 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 siv gypsum yog plastering gypsum, bonded gypsum, inlaid gypsum, thiab pobzeb nplaum. Plastering gypsum yog cov khoom siv zoo plastering rau sab hauv phab ntsa thiab qab nthab. Lub phab ntsa nto plastered nrog nws yog zoo thiab du. Lub tsev tshiab lub teeb board nplaum yog cov khoom nplaum ua los ntawm gypsum ua cov khoom siv hauv paus thiab ntau yam khoom ntxiv. Nws yog tsim rau kev sib txuas ntawm ntau yam khoom siv hauv tsev inorganic. Nws yog non-toxic, Odorless, thaum ntxov lub zog thiab ceev ceev, muaj zog kev sib raug zoo thiab lwm yam ntxwv, nws yog ib tug pab txhawb rau lub tsev boards thiab thaiv kev tsim kho; gypsum caulking tus neeg saib xyuas yog qhov sib txawv ntawm cov gypsum boards thiab kho qhov muab tub lim rau phab ntsa thiab cov kab nrib pleb.
Cov khoom gypsum no muaj ntau txoj haujlwm sib txawv. Ntxiv nrog rau lub luag haujlwm ntawm gypsum thiab lwm yam khoom ntim, qhov teeb meem tseem ceeb yog qhov ntxiv cellulose ether additives ua lub luag haujlwm tseem ceeb. Txij li thaum gypsum muab faib ua anhydrous gypsum thiab hemihydrate gypsum, qhov sib txawv gypsum muaj qhov sib txawv ntawm qhov kev ua tau zoo ntawm cov khoom, yog li thickening, dej tuav thiab retardation txiav txim siab qhov zoo ntawm gypsum tsev cov ntaub ntawv. Qhov teeb meem tshwm sim ntawm cov ntaub ntawv no yog hollowing thiab cracking, thiab thawj lub zog tsis tuaj yeem ncav cuag. Yuav kom daws tau qhov teeb meem no, nws yog xaiv hom cellulose thiab cov khoom siv sib xyaw ua ke ntawm cov retarder. Hauv qhov no, feem ntau xaiv methyl lossis hydroxypropyl methyl 30000. -60000cps, tus nqi ntxiv yog 1.5%-2%. Ntawm lawv, cellulose tsom rua dej tuav thiab retarding lubrication. Txawm li cas los xij, nws tsis tuaj yeem cia siab rau cellulose ether ua ib qho retarder, thiab nws yog ib qho tsim nyog yuav tsum tau ntxiv citric acid retarder los sib tov thiab siv yam tsis muaj kev cuam tshuam rau thawj lub zog.
Kev tuav dej feem ntau yog hais txog qhov dej ntau npaum li cas yuav ploj mus yam tsis muaj dej nqus dej sab nraud. Yog tias cov phab ntsa qhuav dhau lawm, kev 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 koj npaj ib qho kev daws teeb meem, thov xa mus rau txoj kev npaj ntawm cov tshuaj.
(5) Thermal rwb thaiv tsev mortar
Rwb thaiv tsev mortar yog ib yam tshiab ntawm sab hauv phab ntsa rwb thaiv tsev cov ntaub ntawv nyob rau hauv sab qaum teb cheeb tsam. Nws yog cov khoom siv phab ntsa ua ke los ntawm cov khoom siv rwb thaiv tsev, tshuaj khib thiab cov ntawv khi. 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
Xaiv HPNC 20000cps rau tus neeg saib xyuas interface, xaiv 60000cps lossis ntau dua rau cov nplais nplaum, thiab tsom mus rau cov thickener hauv tus neeg saib xyuas interface, uas tuaj yeem txhim kho lub zog tensile thiab tiv thaiv xub xub. Siv los ua cov dej tuav hauv kev sib txuas ntawm cov vuas kom tiv thaiv cov vuas los ntawm lub cev qhuav dej sai heev thiab poob tawm.
Post lub sij hawm: Feb-16-2023