Cellulose ether yog ib qho polymer uas tsis yog ionic semi-synthetic, uas yog dej-soluble thiab solvent-soluble. Nws muaj cov teebmeem sib txawv hauv ntau yam lag luam. Piv txwv li, hauv cov khoom siv tshuaj lom neeg hauv tsev, nws muaj cov teebmeem sib xyaw ua ke hauv qab no:
①Tus neeg sawv cev khaws dej
②Thickener
③ Kev Sib Tw
④Kev tsim cov yeeb yaj kiab
⑤ Cov Ntawv Txuas
Hauv kev lag luam polyvinyl chloride, nws yog ib qho emulsifier thiab dispersant; hauv kev lag luam tshuaj, nws yog ib qho binder thiab qeeb thiab tswj cov khoom siv tso tawm, thiab lwm yam. Vim tias cellulose muaj ntau yam kev sib xyaw ua ke, nws daim ntawv thov Lub teb kuj yog qhov dav tshaj plaws. Tom ntej no, kuv yuav tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.
1. Hauv kev lag luam pleev xim latex, xaiv hydroxyethyl cellulose, qhov kev qhia dav dav ntawm qhov sib npaug viscosity yog RT30000-50000cps, uas sib raug rau qhov kev qhia ntawm HBR250, thiab qhov kev siv tshuaj feem ntau yog li 1.5‰-2‰. Lub luag haujlwm tseem ceeb ntawm hydroxyethyl hauv cov xim latex yog ua kom tuab, tiv thaiv kev sib xyaw ntawm cov xim, pab kom cov xim sib cais, ruaj khov ntawm cov latex, thiab ua kom cov viscosity ntawm cov khoom, uas yog qhov pab tau rau kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yooj yim dua rau siv. Nws tuaj yeem yaj rau hauv dej txias lossis 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 siv yog raws li nram no:
I. Ntxiv ncaj qha rau hauv kev tsim khoom: Rau txoj kev no, hydroxyethyl cellulose qeeb hom yuav tsum tau xaiv, thiab hydroxyethyl cellulose nrog lub sijhawm yaj ntau dua 30 feeb siv. Dej ntshiab ntau hauv qhov ncauj ② Pib do ntawm qhov ceev qis tas li, thiab tib lub sijhawm maj mam ntxiv hydroxyethyl rau hauv cov tshuaj sib npaug ③ Txuas ntxiv do kom txog thaum tag nrho cov khoom siv granular tau ntub ④ Ntxiv lwm yam khoom ntxiv thiab cov khoom ntxiv alkaline, thiab lwm yam. ⑤ Do kom txog thaum Tag nrho cov hydroxyethyl pawg yaj tag, tom qab ntawd ntxiv lwm yam khoom hauv cov mis, thiab zom kom txog thaum cov khoom tiav.
Ⅱ. Nruab nrog cov cawv niam rau kev siv tom qab: Txoj kev no tuaj yeem xaiv cov cellulose tam sim ntawd, uas muaj cov nyhuv tiv thaiv kab mob pwm. Qhov zoo ntawm txoj kev no yog tias nws muaj kev ywj pheej ntau dua thiab tuaj yeem ntxiv ncaj qha rau cov xim latex. Txoj kev npaj yog tib yam li cov kauj ruam ①-④.
Ⅲ. Npaj cov porridge rau siv tom qab: Vim tias cov organic solvents yog cov organic solvents tsis zoo (insoluble) rau hydroxyethyl, cov solvents no tuaj yeem siv los npaj porridge. Cov organic solvents feem ntau siv yog cov kua organic hauv cov xim latex, xws li ethylene glycol, propylene glycol, thiab cov neeg sawv cev tsim zaj duab xis (xws li diethylene glycol butyl acetate). Cov porridge hydroxyethyl cellulose tuaj yeem ntxiv ncaj qha rau hauv cov xim. Txuas ntxiv do kom txog thaum yaj tag.
2. Hauv cov khoom siv pleev phab ntsa: Tam sim no, cov khoom siv pleev ib puag ncig uas tiv taus dej thiab txhuam tsis tau hauv feem ntau lub nroog hauv kuv lub tebchaws tau txais txiaj ntsig los ntawm tib neeg. Cov kua nplaum zoo, kev tsim kho yog ua los ntawm acetalizing polyvinyl 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 siv los hloov cov khoom siv no. Uas yog hais tias, rau kev tsim cov khoom siv hauv tsev uas zoo rau ib puag ncig, cellulose tam sim no yog tib yam khoom siv. Hauv cov khoom siv pleev dej uas tiv taus dej, nws muab faib ua ob hom: hmoov qhuav pleev thiab pleev nplaum pleev. Ntawm ob hom pleev no, yuav tsum xaiv cov methyl cellulose hloov kho thiab hydroxypropyl methyl. Qhov kev qhia viscosity feem ntau yog ntawm 30000-60000cps. Lub luag haujlwm tseem ceeb ntawm cellulose hauv pleev yog kev khaws cia dej, kev sib txuas thiab kev ua kom lubrication. Vim tias cov qauv putty ntawm ntau lub tuam txhab tsim khoom sib txawv, qee qhov yog grey calcium, lub teeb calcium, dawb cement, thiab lwm yam, thiab qee qhov yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li cov lus qhia, viscosity thiab kev nkag mus ntawm cellulose hauv ob hom qauv kuj sib txawv. Tus nqi ntxiv yog li 2‰-3‰. Hauv kev tsim kho ntawm phab ntsa scraping putty, txij li qhov chaw ntawm phab ntsa muaj qee qib ntawm kev nqus dej (qhov dej nqus ntawm phab ntsa cib yog 13%, thiab dej nqus ntawm cov pob zeb yog 3-5%), ua ke nrog kev ua pa ntawm lub ntiaj teb sab nraud, yog tias putty poob dej sai dhau, nws yuav ua rau muaj kab nrib pleb lossis tshem tawm hmoov, uas yuav ua rau lub zog ntawm putty tsis muaj zog. Yog li ntawd, ntxiv cellulose ether yuav daws qhov teeb meem no. Tab sis qhov zoo ntawm cov khoom sau, tshwj xeeb tshaj yog qhov zoo ntawm tshauv calcium kuj tseem ceeb heev. Vim yog qhov siab viscosity ntawm cellulose, qhov buoyancy ntawm putty kuj tau txhim kho, thiab qhov tshwm sim sagging thaum lub sijhawm tsim kho kuj zam, thiab nws yooj yim dua thiab txuag zog tom qab scraping. Nws yooj yim dua los ntxiv cellulose ether rau hauv cov hmoov putty. Nws cov khoom tsim thiab siv yooj yim dua. Cov khoom sau thiab cov khoom ntxiv tuaj yeem sib xyaw ua ke hauv cov hmoov qhuav.
3. Cov pob zeb ua vaj tse: Hauv cov pob zeb ua vaj tse, kom ua tiav qhov muaj zog tshaj plaws, cov cement yuav tsum tau hydrated tag nrho. Tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj sov kev tsim kho, cov pob zeb ua vaj tse poob dej sai dhau, thiab cov kev ntsuas ntawm kev ua kom tiav yog siv los tswj thiab txau dej. Txoj kev thawj zaug yog ua rau pov tseg cov peev txheej dej thiab kev ua haujlwm tsis yooj yim. Lub ntsiab lus tseem ceeb yog tias dej tsuas yog nyob rau ntawm qhov chaw, thiab kev ua kom sab hauv tseem tsis tiav. Yog li ntawd, kev daws teeb meem rau qhov teeb meem no yog ntxiv yim tus neeg sawv cev dej rau hauv cov pob zeb ua vaj tse. Feem ntau, hydroxypropyl raug xaiv. Methyl lossis methyl cellulose, qhov kev qhia viscosity yog ntawm 20000-60000cps, thiab qhov ntxiv yog 2% -3%. Tus nqi khaws dej tuaj yeem nce mus txog ntau dua 85%. Txoj kev siv hauv cov pob zeb ua vaj tse yog sib tov cov hmoov qhuav sib npaug thiab nchuav rau hauv dej.
4. Hauv kev siv plastering gypsum, kev sib txuas gypsum, thiab caulking gypsum: Nrog rau kev txhim kho sai ntawm kev lag luam kev tsim kho, tib neeg qhov kev xav tau cov ntaub ntawv tsim kho tshiab kuj nce ntxiv. Vim muaj kev nce ntxiv ntawm tib neeg txoj kev paub txog kev tiv thaiv ib puag ncig thiab kev txhim kho tas mus li ntawm kev ua haujlwm ntawm kev tsim kho, cov khoom siv cementitious Gypsum tau tsim kho sai. Tam sim no, cov khoom gypsum feem ntau yog plastering gypsum, bonded gypsum, inlaid gypsum, thiab vuas nplaum. Plastering gypsum yog cov khoom siv plastering zoo rau sab hauv phab ntsa thiab qab nthab. Qhov chaw ntawm phab ntsa uas plastered nrog nws yog qhov zoo thiab du. Lub tsev teeb pom kev zoo board nplaum tshiab yog cov khoom nplaum ua los ntawm gypsum ua cov khoom siv hauv paus thiab ntau yam ntxiv. Nws yog qhov tsim nyog rau kev sib txuas ntawm ntau yam khoom siv phab ntsa inorganic. Nws tsis muaj tshuaj lom, Tsis muaj ntxhiab, lub zog thaum ntxov thiab teeb tsa sai, kev sib txuas muaj zog thiab lwm yam ntxwv, nws yog cov khoom txhawb nqa rau cov laug cam tsev thiab thaiv kev tsim kho; gypsum caulking tus neeg sawv cev yog qhov sib txawv ntawm gypsum boards thiab kho cov khoom siv rau phab ntsa thiab kab nrib pleb. Cov khoom gypsum no muaj ntau yam haujlwm sib txawv. Ntxiv rau lub luag haujlwm ntawm gypsum thiab cov khoom siv fillers, qhov teeb meem tseem ceeb yog tias cov cellulose ether additives ntxiv ua lub luag haujlwm tseem ceeb. Txij li thaum gypsum raug faib ua anhydrous gypsum thiab hemihydrate gypsum, gypsum sib txawv muaj cov teebmeem sib txawv rau kev ua haujlwm ntawm cov khoom, yog li thickening, dej khaws cia thiab retardation txiav txim siab qhov zoo ntawm gypsum tsev cov ntaub ntawv. Qhov teeb meem feem ntau ntawm cov ntaub ntawv no yog hollowing thiab tawg, thiab lub zog pib tsis tuaj yeem ncav cuag. Txhawm rau daws qhov teeb meem no, nws yog xaiv hom cellulose thiab cov txheej txheem siv cov tshuaj retarder. Hauv qhov no, methyl lossis hydroxypropyl methyl 30000 feem ntau raug xaiv. -60000cps, qhov ntxiv yog 1.5% -2%. Ntawm lawv, cellulose tsom mus rau kev khaws cia dej thiab retarding lubrication. Txawm li cas los xij, nws tsis yooj yim sua kom cia siab rau cellulose ether ua retarder, thiab nws yog qhov tsim nyog los ntxiv citric acid retarder los sib tov thiab siv yam tsis cuam tshuam rau lub zog pib. Kev khaws cia dej feem ntau yog hais txog ntau npaum li cas dej yuav ploj mus ntuj tsis muaj dej sab nraud nqus. Yog tias phab ntsa qhuav dhau, dej nqus thiab ntuj tsim ua rau ntawm qhov chaw hauv qab yuav ua rau cov khoom poob dej sai dhau, thiab qhov khoob thiab tawg kuj yuav tshwm sim. Txoj kev siv no yog sib xyaw nrog hmoov qhuav. Yog tias koj npaj cov tshuaj, thov saib txoj kev npaj cov tshuaj.
5. Cov tshuaj nplaum rwb thaiv tsev Cov tshuaj nplaum rwb thaiv tsev yog ib hom khoom siv rwb thaiv tsev phab ntsa tshiab hauv thaj tsam sab qaum teb. Nws yog cov khoom siv phab ntsa uas tsim los ntawm cov khoom siv rwb thaiv tsev, cov tshuaj nplaum thiab cov khoom siv khi. Hauv cov khoom siv no, cellulose ua 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 yog ntawm 2‰-3‰), thiab txoj kev siv yog sib tov hmoov qhuav.
6. Tus neeg sawv cev sib txuas Xaiv HPNC 20,000 cps ua tus neeg sawv cev sib txuas, xaiv 60,000 cps lossis ntau dua ua cov nplaum pobzeb, thiab tsom mus rau tus neeg sawv cev tuab hauv tus neeg sawv cev sib txuas, uas tuaj yeem txhim kho lub zog tensile thiab lub zog tiv thaiv xub. Siv ua tus neeg sawv cev khaws dej hauv kev sib txuas ntawm cov pobzeb kom tiv thaiv cov pobzeb kom tsis txhob qhuav sai thiab poob tawm.
Lub sijhawm tshaj tawm: Lub Ob Hlis-18-2023