Kev siv thiab lub luag haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev

Cellulose ether yog ib hom polymer uas tsis yog ionic semi-synthetic nrog dej-soluble thiab solvent-soluble, uas ua rau muaj ntau yam haujlwm sib txawv hauv ntau yam lag luam, piv txwv li, hauv cov khoom siv tshuaj lom neeg hauv tsev, nws muaj cov haujlwm sib xyaw ua ke hauv qab no:

① tus neeg sawv cev khaws dej ② cov khoom ua kom tuab ③ ua kom sib npaug ④ tsim zaj duab xis ⑤ cov khoom khi

Hauv kev lag luam PVC, nws yog ib qho emulsifier, dispersant; hauv kev lag luam tshuaj, nws yog ib qho binder thiab qeeb thiab tswj cov pob txha cov ntaub ntawv tso tawm, thiab lwm yam. Nws yog vim cellulose muaj ntau yam kev sib xyaw ua ke uas nws muaj ntau yam kev siv. Cov hauv qab no tsom mus rau kev siv thiab lub luag haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.

(1) Hauv phab ntsa putty:

Tam sim no, peb lub teb chaws nyob rau hauv feem ntau lub nroog uas tsis muaj dej, tsis yooj yim rau kev txhuam, thiab cov khoom siv ib puag ncig zoo tau raug suav tias yog cov neeg tseem ceeb. Hauv thawj ob peb xyoos, vim yog siv cov kua nplaum ua los ntawm cov khoom siv putty, cov roj formaldehyde uas ua rau tib neeg txoj kev noj qab haus huv puas tsuaj, cov kua nplaum ua los ntawm polyvinyl cawv thiab formaldehyde acetal ua rau muaj kev cuam tshuam. Yog li cov khoom siv no maj mam raug tshem tawm los ntawm cov neeg, thiab hloov cov khoom siv no yog cellulose ether series, uas yog hais tias, kev tsim cov khoom siv hauv tsev zoo rau ib puag ncig, cellulose tam sim no tsuas yog ib qho khoom siv xwb.

Hauv cov dej-resistant putty yog muab faib ua qhuav hmoov putty thiab putty paste ob hom putty, ob hom putty no feem ntau xaiv hloov kho methyl cellulose thiab hydroxypropyl methyl ob hom viscosity specifications feem ntau nyob rau hauv 30000-60000cps ntawm qhov tsim nyog tshaj plaws, hauv lub putty cellulose lub luag haujlwm tseem ceeb yog khaws dej, bonding, lubrication thiab lwm yam lub luag haujlwm. Vim muaj ntau lub tuam txhab tsim cov mis putty tsis zoo ib yam, qee qhov yog grey calcium, lub teeb calcium, dawb cement, thiab lwm yam, qee qhov yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li ob hom mis xaiv cov lus qhia ntawm cellulose viscosity thiab nws cov infiltration ntawm tus nqi tsis zoo ib yam, tus nqi ntawm kev nkag mus dav dav ntawm 2 ‰ -3 ‰ lossis li ntawd. Thaum siv cov khoom siv putty los txhuam phab ntsa, vim tias cov phab ntsa muaj qee yam dej nqus (dej nqus ntawm phab ntsa cib yog 13%, pob zeb yog 3-5%), ua ke nrog lub ntiaj teb sab nraud ntawm kev ua pa, yog li ntawd yog tias cov khoom siv putty poob dej sai dhau, nws yuav ua rau muaj kab nrib pleb lossis de-powdering thiab lwm yam tshwm sim, yog li ua rau lub zog ntawm cov khoom siv putty qaug zog, vim li no, tom qab ntxiv cellulose ether yuav daws qhov teeb meem no. Tab sis qhov zoo ntawm cov khoom siv filler, tshwj xeeb tshaj yog qhov zoo ntawm grey calcium kuj tseem ceeb heev.

Vim tias cellulose muaj viscosity siab, yog li ntawd kuj txhim kho qhov putty's adhesion, tab sis kuj kom tsis txhob muaj kev tsim kho ntawm qhov tshwm sim ntawm dai, thiab khawb tom qab qhov xis nyob dua, kev txuag zog thiab lwm yam. Hauv cov hmoov qhuav putty cellulose ether yuav tsum tsim nyog ntxiv ntau cov ntsiab lus, nws cov khoom tsim tawm, kev siv yooj yim dua, cov khoom sau thiab cov khoom ntxiv rau cov hmoov qhuav sib xyaw ua ke tuaj yeem ua tau, kev tsim kho kuj yooj yim dua, dej hauv tsev, nrog ntau npaum li cas nrog ntau npaum li cas.

(2) cov pob zeb ua vaj tse:

Hauv cov pob zeb ua vaj tse, tiag tiag mus txog qhov kawg zog, yuav tsum ua kom cov cement tag nrho cov tshuaj tiv thaiv hydration xwb, tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj sov kev tsim kho, cov pob zeb ua vaj tse poob dej sai dhau, siv cov kev ntsuas kom tag nrho hydrate ntawm kev txuag ntawm sprinkler, txoj kev no yog kev pov tseg ntawm cov peev txheej dej thiab kev tsis yooj yim ntawm kev ua haujlwm, qhov tseem ceeb yog tias cov dej tsuas yog nyob rau ntawm qhov chaw, thiab sab hauv hydration tseem tsis tiav, yog li qhov kev daws teeb meem ntawm txoj kev koom nrog hauv cov pob zeb ua vaj tse dej khaws cia tus neeg sawv cev cellulose feem ntau xaiv hydroxypropyl methyl lossis methyl cellulose, viscosity specifications ntawm 20000 - 60000cps, ntxiv 2% - 3%. Nyob ib ncig ntawm, tus nqi khaws cia dej tuaj yeem nce mus txog ntau dua 85%, kev siv cov pob zeb ua vaj tse hauv txoj kev ntawm cov hmoov qhuav sib xyaw sib npaug rau hauv dej tuaj yeem ua tau.

(3) hauv stucco plaster, bonding plaster, embedded plaster:

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 yog kev nce ntxiv ntawm tib neeg txoj kev paub txog kev tiv thaiv ib puag ncig thiab kev txhim kho tas 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 brushing plaster, bonding plaster, embedded plaster, vuas nplaum thiab lwm yam. Brush plaster yog ib hom khoom siv plaster zoo heev rau phab ntsa sab hauv thiab sab saum toj, uas qhov chaw ntawm phab ntsa yog mos thiab du, tsis muaj hmoov poob tawm thiab lub substrate yog sib txuas ruaj khov tsis muaj qhov tawg thiab poob tawm, thiab nws muaj lub luag haujlwm ntawm kev tiv thaiv hluav taws; bonding plaster yog ib hom tshiab ntawm lub tsev lub teeb-board sib txuas tus neeg sawv cev, uas yog ua los ntawm gypsum ua cov khoom siv hauv paus thiab ntxiv nrog ntau yam additives, thiab nws yog tsim rau kev sib txuas ntawm txhua yam khoom siv inorganic phab ntsa, nrog cov yam ntxwv ntawm tsis muaj tshuaj lom, tsis muaj saj, coagulation sai thiab sib txuas sai. Nws yog qhov tsim nyog rau kev sib txuas ntawm ntau hom khoom siv phab ntsa inorganic, nrog rau tsis muaj tshuaj lom, tsis muaj ntxhiab, ceev ceev, khov sai, sib txuas ruaj khov thiab lwm yam ntxwv, thiab yog cov khoom siv txhawb nqa rau kev tsim cov laug cam thiab cov thaiv tsev; gypsum caulk yog qhov sib txawv ntawm cov laug cam gypsum nrog rau kev kho cov phab ntsa thiab cov kab nrib pleb.

Cov khoom gypsum no muaj ntau yam haujlwm sib txawv, ntxiv rau gypsum thiab lwm yam khoom siv ntxiv ua lub luag haujlwm, qhov teeb meem tseem ceeb yog kev ntxiv cov cellulose ether additives ua lub luag haujlwm tseem ceeb. Txij li thaum gypsum raug muab faib ua anhydrous gypsum thiab semi-anhydrous gypsum, gypsum sib txawv muaj cov teebmeem sib txawv rau kev ua haujlwm ntawm cov khoom, yog li thickening, dej khaws cia thiab retardation ntawm gypsum tsev cov ntaub ntawv txiav txim siab qhov zoo ntawm gypsum tsev cov ntaub ntawv. Qhov teeb meem feem ntau ntawm cov ntaub ntawv no yog qhov hollowing thiab tawg, lub zog pib tsis tuaj yeem ncav cuag, los daws qhov teeb meem no, yog xaiv hom cellulose thiab retarder composite siv ntawm qhov teeb meem, hauv qhov no, kev xaiv dav dav ntawm methyl lossis hydroxypropylmethyl 30,000 - 60,000cps, qhov ntxiv ntawm 1.5% - 2%. Nruab nrab, cellulose uas lub hom phiaj yog khaws dej retarder lubrication. Txawm li cas los xij, hauv qhov no vam khom cellulose ether ua tus retarder tsis tau mus txog, yuav tsum ntxiv citric acid retarder sib xyaw siv yuav tsis cuam tshuam rau lub zog pib.

Feem ntau, qhov ceev ntawm kev khaws dej yog hais txog qhov xwm txheej uas tsis muaj dej nqus los ntawm sab nraud, qhov ntau ntawm cov dej poob ntuj, yog tias phab ntsa qhuav, qhov dej hauv qab ntawm lub hauv paus nqus thiab cov dej poob ntawm cov khoom sai dhau, tib yam yuav tshwm sim cov thoob khib nyiab, tawg. Txoj kev siv no rau cov hmoov qhuav sib xyaw siv, yog tias npaj cov tshuaj tuaj yeem hais txog kev npaj cov tshuaj.

(4) Cov tshuaj nplaum rwb thaiv tsev

Cov tshuaj nplaum rwb thaiv tsev yog ib hom khoom siv rwb thaiv tsev tshiab rau sab hauv phab ntsa, nws yog cov khoom siv phab ntsa uas ua los ntawm cov khoom siv rwb thaiv tsev, cov tshuaj nplaum thiab cov khoom siv khi. Cellulose hauv cov khoom no, tsom mus rau kev sib txuas, ua rau lub luag haujlwm ntawm lub zog nce ntxiv. Feem ntau xaiv methyl cellulose viscosity siab (10000cps lossis li ntawd), qhov ntau npaum li cas feem ntau yog ntawm 2‰-3‰, siv cov hmoov qhuav sib tov.