Kev ua haujlwm thiab kev siv cellulose ether hauv kev tiv thaiv ib puag ncig cov ntaub ntawv hauv tsev
Cellulose etheryog ib tug non-ionic semi-synthetic polymer, dej-soluble thiab hnyav ob, nyob rau hauv txawv industries tshwm sim los ntawm lub luag hauj lwm yog txawv, xws li nyob rau hauv cov khoom siv tshuaj, nws muaj ib tug composite nyhuv:
① Tus neeg saib xyuas dej
② thickening tus neeg sawv cev
③ theem
④ kev ua yeeb yaj kiab
⑤ daim ntaub;
Hauv kev lag luam PVC, nws yog emulsifier, dispersant; Nyob rau hauv kev lag luam kws tshuaj, nws yog ib hom ntawm binder thiab qeeb tso pob txha cov ntaub ntawv, vim hais tias cellulose muaj ntau yam composite cov teebmeem, yog li nws yog cov feem ntau lug siv teb. Hauv qab no kuv tsom mus rau kev siv cellulose ether hauv kev tiv thaiv ib puag ncig cov ntaub ntawv hauv tsev thiab lub luag haujlwm.
1. latex xim
Nyob rau hauv cov xim xim latex, xaiv hydroxyethyl cellulose, cov lus qhia dav dav ntawm viscosity yog RT3000-50000cps, 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 txhawb kev tawg ntawm cov xim, latex, ruaj khov, thiab tuaj yeem txhim kho cov viscosity ntawm cov khoom, pab txhawb kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yooj yim siv, tuaj yeem yaj hauv ob qho dej txias thiab dej kub, thiab tsis cuam tshuam los ntawm PH tus nqi, tuaj yeem siv nruab nrab ntawm PH tus nqi 2 thiab 12, kev siv peb txoj hauv qab no:
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I. Ncaj qha ntxiv:
Rau txoj kev no, hydroxyethyl cellulose ncua hom - hydroxyethyl cellulose nrog lub sij hawm dissolution ntau tshaj 30 feeb yuav tsum tau xaiv. Cov txheej txheem yog raws li nram no: (1) kom muaj siab yuav tsum tau txiav lub khob ntim thiab cov dej ntshiab kom muaj nuj nqis (2) cov neeg pib qeeb stirring tsis tu ncua, tib lub sij hawm maj mam ntxiv hydroxyethyl tusyees rau cov tshuaj ntawm (3) txuas ntxiv mus kom txog rau thaum tag nrho cov. cov ntaub ntawv ntub dej (4) txhawm rau koom nrog lwm cov khoom siv ntxiv thiab alkaline additives (5) do kom txog thaum tag nrho cov hydroxyethyl yaj tag, ntxiv rau lwm cov khoom xyaw ntawm cov mis, sib tsoo rau cov khoom tiav.
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ⅱ. Nruab nrog niam cawv:
Txoj kev no tuaj yeem xaiv qhov ceev ceev - soluble cellulose, thiab muaj mildew - pov thawj nyhuv. Qhov kom zoo dua ntawm txoj kev no yog kom muaj qhov yooj yim dua, tuaj yeem koom nrog emulsioni xim ncaj qha rau hauv, tsim ib txoj hauv kev zoo ib yam li ①–④ kauj ruam yog tib yam.
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ⅲ, nrog porridge rau siv:
Txij li cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (insoluble) rau hydroxyethyl, lawv tuaj yeem siv los npaj porridge. Feem ntau siv cov kuab tshuaj organic yog cov kua organic hauv cov xim latex, xws li ethylene glycol, propylene glycol thiab cov neeg ua yeeb yaj kiab (xws li diethylene glycol butyl acetate), porridge hydroxyethyl cellulose tuaj yeem ncaj qha ntxiv rau cov xim, tom qab ntxiv, txuas ntxiv mus kom txog thaum yaj tag.
2. scraping phab ntsa putty
Tam sim no, Tuam Tshoj yog nyob rau hauv feem ntau ntawm lub nroog dej tsis kam, tsis kam mus rau swab ntawm ib puag ncig tiv thaiv putty tau yeej coj tiag tiag los ntawm cov neeg, nyob rau hauv ob peb xyoos dhau los, vim hais tias lub putty ua los ntawm lub tsev kua nplaum radiates formaldehyde gas puas rau tib neeg noj qab haus huv, lub tsev. kua nplaum yog ua los ntawm polyvinyl cawv thiab formaldehyde acetal cov tshuaj tiv thaiv. Yog li cov khoom siv no maj mam tshem tawm los ntawm tib neeg, thiab kev hloov ntawm cov khoom siv no yog cellulose ether series ntawm cov khoom, uas yog hais tias, kev tsim cov khoom siv tiv thaiv ib puag ncig, cellulose yog tib yam khoom siv tam sim no.
Nyob rau hauv dej resistant putty yog muab faib mus rau hauv qhuav hmoov putty thiab putty muab tshuaj txhuam ob hom, ob hom putty feem ntau xaiv hloov methyl cellulose thiab hydroxypropyl methyl ob hom, viscosity specification feem ntau yog nyob rau hauv 3000-60000cps ntawm qhov tsim nyog tshaj plaws, nyob rau hauv lub luag hauj lwm tseem ceeb ntawm cellulose hauv putty yog dej tuav, sib txuas, lubrication, thiab lwm yam.
Vim hais tias cov mis putty ntawm txhua lub chaw tsim tshuaj paus tsis zoo ib yam, ib co yog grey calcium, lub teeb calcium, dawb cement, ib co yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li cov specification viscosity thiab infiltration ntawm cellulose ntawm ob lub qauv. tsis zoo ib yam, qhov dav dav ntawm kev ntxiv yog 2‰-3‰ los yog li ntawd.
Nyob rau hauv lub tshuab nqus tsev yuav dhuav nrog me nyuam kev tsim kho, lub hauv paus phab ntsa muaj tej yam absorbent (cib phab ntsa ntawm bibulous tus nqi yog 13%, lub pob zeb yog 3-5%), ua ke nrog evaporation ntawm lub ntiaj teb sab nraud, yog li ntawd yog dhuav nrog me nyuam. dej poob sai heev, yuav ua rau tawg lossis qhov tshwm sim xws li paj ntoos, kom lub zog ntawm putty tsis muaj zog, yog li ntawd, tom qab koom nrog cellulose ether yuav daws qhov teeb meem no. Tab sis qhov zoo ntawm cov khoom ntim, tshwj xeeb tshaj yog qhov zoo ntawm grey calcium kuj tseem ceeb heev. Vim lub siab viscosity ntawm cellulose, nws kuj tseem txhim khu lub buoyancy ntawm putty, thiab zam qhov tshwm sim ntawm ntws dai nyob rau hauv kev tsim kho, thiab nws yog ntau xis thiab zog-txuag tom qab scraping.
3. qhob mortar
Nyob rau hauv lub pob zeb mortar, tiag tiag ua tiav qhov kawg ntawm lub zog, yuav tsum ua kom cov cement hydration cov tshuaj tiv thaiv tag nrho, tshwj xeeb tshaj yog nyob rau lub caij ntuj sov, hauv kev tsim kho ntawm cov pob zeb mortar dej poob sai heev, kev ntsuas hydrated tag nrho ntawm kev kho dej, txoj kev no yog kev siv dej pov tseg thiab Kev ua haujlwm tsis yooj yim, qhov tseem ceeb tsuas yog nyob rau saum npoo, dej thiab dej tsis txaus, yog li txoj hauv kev los daws qhov teeb meem no, Hauv mortar pob zeb feem ntau xaiv ntxiv hydroxypropyl methyl cellulose lossis methyl cellulose, viscosity specifications ntawm 20000-60000cps, ntxiv tus nqi ntawm 2‰–3‰ los yog li ntawd, dej tuav tus nqi yuav nce mus rau ntau tshaj 85%, nyob rau hauv mortar pob zeb siv txoj kev rau qhuav hmoov sib tov sib tov tom qab ntxiv dej.
4. pleev xim gypsum, sib txuas gypsum, caulking gypsum
Nrog rau 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 nyob rau ib hnub, vim tias cov neeg muaj 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 txhim kho sai. Tam sim no cov khoom gesso feem ntau muaj stucco gesso, caking gesso, teeb gesso, pobzeb caking tus neeg saib xyuas tos.
Plaster yog ib yam zoo heev ntawm sab hauv phab ntsa thiab ru tsev plastering cov ntaub ntawv, nrog rau nws los so lub phab ntsa yog ilv thiab du, tsis txhob poob hmoov, thiab lub hauv paus daim ntawv cog lus ruaj khov, tsis muaj cracking tawm tshwm sim, thiab muaj kev tiv thaiv hluav taws muaj nuj nqi; Adhesive gypsum yog ib yam tshiab ntawm lub tsev lub teeb board nplaum, gypsum raws li cov khoom siv hauv paus, ntxiv rau ntau yam khoom siv ntxiv thiab ua los ntawm cov khoom nplaum, nws yog tsim rau txhua yam ntawm cov khoom siv hauv tsev inorganic vaj tsev, tsis muaj tshuaj lom, tsis qab, thaum ntxov. lub zog thiab kev teeb tsa ceev ceev, kev sib txuas yog lub rooj tsav xwm hauv tsev, thaiv kev tsim cov khoom txhawb nqa; Gypsum seam filling agent yog gypsum phaj nruab nrab ntawm qhov sib txawv filling cov khoom thiab phab ntsa, tawg kho filling.
Cov khoom gypsum no muaj ntau yam kev ua haujlwm sib txawv, ntxiv rau gypsum thiab lwm yam khoom siv los ua lub luag haujlwm, qhov teeb meem tseem ceeb yog ntxiv cellulose ether additives ua lub luag haujlwm tseem ceeb. Raws li qhov tshwm sim ntawm gesso cent tsis muaj dej gesso thiab ib xees ntawm ib nrab dej gesso, sib txawv gesso yog qhov sib txawv ntawm qhov kev ua tau zoo ntawm cov khoom, nce tuab, tiv thaiv dej, qeeb coagulate qhov zoo uas txiav txim siab gesso cov khoom siv hauv tsev. Qhov teeb meem tshwm sim ntawm cov ntaub ntawv no yog hollow nruas cracking, pib lub zog yog tsis mus txog, los daws qhov teeb meem no, yog xaiv hom cellulose thiab retarding tus neeg sawv cev compound siv cov teeb meem, nyob rau hauv no hwm, kev xaiv dav dav ntawm methyl los yog hydroxypropyl methyl 30000-60000cps, ntxiv tus nqi yog 1.5‰-2‰ ntawm, qhov tseem ceeb ntawm cellulose yog dej tuav thiab retarding lubrication.
Txawm li cas los xij, nyob rau hauv qhov no kom vam khom cellulose ether li retarder tsis yog mus txog, yuav tsum tau ntxiv citric acid retarder tom qab sib xyaw siv yuav tsis cuam tshuam rau thawj lub zog.
Dej tuav tus nqi feem ntau yog hais txog tus nqi ntawm cov dej tsis zoo nyob rau hauv qhov tsis muaj kev nqus dej sab nraud. Yog tias phab ntsa qhuav, lub hauv paus nto absorbs dej thiab ntuj evaporation ua rau cov khoom poob dej sai heev, thiab tseem yuav muaj lub nruas khoob thiab qhov tshwm sim tawg.
Txoj kev siv no yog sib tov cov hmoov qhuav, yog tias qhov kev npaj ntawm kev daws tuaj yeem xa mus rau kev npaj ntawm kev daws.
5. rwb thaiv tsev mortar
Thermal rwb thaiv tsev mortar yog ib yam tshiab ntawm sab hauv phab ntsa thermal rwb thaiv tsev khoom nyob rau sab qaum teb Tuam Tshoj. Nws yog cov khoom siv phab ntsa ua ke los ntawm 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, methyl cellulose uas muaj viscosity siab (txog 10000eps) raug xaiv, thiab qhov ntau npaum li cas ntawm 2‰ thiab 3‰. Txoj kev siv yog qhuav hmoov sib tov.
6. interface tus neeg sawv cev
Tus neeg saib xyuas kev sib txuas yog HPMC20000cps, pobzeb binder yog ntau tshaj 60000cps, thiab tus neeg sawv cev cuam tshuam feem ntau yog siv los ua thickener, uas tuaj yeem txhim kho lub zog tensile thiab lub zog xub.
Post lub sij hawm: Jan-27-2022