Cellulose ether yog tsis-ionic semi-hluav taws xob semi-hluavtaws polymer, uas yog dej-soluble thiab cov kuab-soluble. Nws muaj cov teebmeem sib txawv hauv kev lag luam sib txawv. Piv txwv li, hauv cov khoom siv hauv tsev, nws muaj cov teebmeem hauv qab no:
①water khaws tus neeg sawv cev
②thickener
HDLev
④Filil tsim
Binder
Hauv kev lag luam polyvinyl chloride kev lag luam, nws yog emulsifier thiab dispersant; Hauv kev lag luam kws tshuaj, nws yog lub binder thiab muab tso tawm qeeb thiab tshuaj xyuas lub moj khaum, nws daim ntawv thov lub teb tseem yog qhov ntau tshaj plaws. Tom ntej no, Kuv yuav tsom rau kev siv thiab ua haujlwm ntawm cellulose ether hauv ntau cov ntaub ntawv hauv tsev.
1. Hauv kev lag luam ntawm cov xim yas, xaiv cov cellulose hydulose, qhov tseeb ntawm HBR250, thiab cov kev siv tshuaj rau cov lus qhia zoo yog li 1.5 ‰ -2 ‰. Lub ntsiab muaj nuj nqi ntawm hydroxyethyl hauv looj xim yog txhawm rau txhawm rau txhawm rau ntawm cov xim ntawm cov khoom siv, thiab nce cov kab mob viscing ntawm kev tsim kho : Hydroxyethyl cellulose yog qhov yooj yim dua los siv. Nws tuaj yeem yog yaj hauv dej txias lossis dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi PH. Nws tuaj yeem siv kev nyab xeeb ntawm PI tus nqi 2 thiab 12. Cov hau kev ntawm kev siv yog raws li hauv qab no:
I. Ntxiv rau hauv kev tsim khoom: rau cov qauv no, hydroxyethyl cellulose lub sijhawm yuav tsum tau xaiv, thiab lub sijhawm hydrothethyl ntawm ntau tshaj 30 feeb yog siv. Quantitative Turified dej sab hauv lub qhov ncauj ②start stirring ntawm qhov kev daws teeb meem maj mam ntxiv, thiab lwm yam kom txog thaum txhua cov pab pawg hydroxyethyl yog Ua kom yaj, tom qab ntawd ntxiv lwm yam hauv cov mis, thiab zom kom txog thaum cov khoom tiav.
Ⅱ. Nruab nrog Niam Dej cawv rau kev siv tom qab: Cov qauv no tuaj yeem xaiv cellulose tam sim no, uas muaj cov nyhuv tawm tsam. Qhov zoo dua ntawm txoj kev no yog tias nws tau muaj kev yoog tau zoo dua thiab tuaj yeem txuas ntxiv mus rau cov xim looj. Txoj kev npaj npaj yog tib yam li cov kauj ruam ①-④.
Ⅲ. Npaj porridge rau kev siv tom qab: Vim tias organic cov kuab tshuaj 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 ethylene ua kua, xws li diylene glycol, thiab zaj duab xis-ua cov neeg sawv cev (xws li diethylene glyyl acetate). Cov porridge hydrothethyl cellulose tuaj yeem txuas ncaj qha ntxiv rau cov xim. Txuas ntxiv mus rau kom txog thaum yaj tag.
2. Nyob rau hauv phab ntsa scraping puttty: tam sim no kev tiv thaiv, ib puag ncig kev tiv thaiv thiab txhuam cov dej-tiv taus hauv kuv lub tebchaws tau muaj txiaj ntsig los ntawm tib neeg. Noj qab nyob zoo, siv cov kua nplaum yog tsim los ntawm acetalizer cawv thiab formaldehyde. Yog li ntawd, cov ntaub ntawv no maj mam muab tshem tawm los ntawm cov neeg, thiab lub cellulose siv ether series yog siv los hloov cov khoom no. Uas yog hais, rau kev txhim kho cov ntaub ntawv ua kom zoo hauv tsev, cellulose yog tam sim no yog cov khoom siv xwb. Nyob rau hauv cov dej-resistant putty, nws tau muab faib ua ob hom: qhuav hmoov putty thiab putical muab tshuaj txhuam. Ntawm cov ob hom putty, hloov methyl cellulose thiab hydroxypropyl yuav tsum tau xaiv. Lub viscosity specification feem ntau yog ntawm 30000-6000000CPS. Lub luag haujlwm tseem ceeb ntawm cellulose hauv putty yog dej khaws cia, kev sib koom tes thiab lubrication. Txij li cov qauv putty ntawm ntau cov tuam ntxhab sib txawv, qee qhov grey calcium, dawb xis mas, thiab lwm yam. ob daim qauv kuj sib txawv. Tus nqi ntxiv yog hais txog 2 ‰ -3 ‰. Hauv kev tsim kho ntawm phab ntsa scraping puttty, txij li hauv paus ntawm phab ntsa muaj qee qhov kev nqus dej yog 13%, thiab cov khoom nqus dej ntawm cov pob zeb yog 3-5%), Ua ke nrog txoj kev evaped ntawm lub ntiaj teb sab nraud, yog tias lub putty loses tau nrawm heev, nws yuav ua rau tawg lossis hmoov tshem tawm, uas yuav ua rau muaj zog lub zog ntawm lub putty. Yog li no, ntxiv cellulose ether yuav daws cov teeb meem no. Tab sis qhov zoo ntawm tus muab tub lim, tshwj xeeb yog qhov zoo ntawm cov hmoov av tshauv kuj tseem tseem ceeb heev. Vim yog cov viscosity siab ntawm cellulose, lub buoyancy ntawm lub putty tseem ua kom zoo dua qub thaum lub sijhawm kev tsim kho kuj yog zam, thiab ua haujlwm zoo dua thiab ua haujlwm zoo dua tom qab scraping. Nws yooj yim dua ntxiv cellulose ether hauv cov hmoov putty. Nws cov kev tsim khoom thiab siv tau yooj yim dua. Tus muab tub lim thiab cov quav ntxiv tuaj yeem sib xyaw nrog cov hmoov nplej qhuav.
3. Cov tshuaj khib nyiab pov tseg: ua kom huv huv, kom ua tiav lub zog kawg, cov xis mas hydrated. Tshwj xeeb tshaj yog nyob rau hauv kev tsim kho lub caij ntuj sov, lub pob zeb pov tseg dhau nrawm, thiab ntsuas ntawm cov dej ua tiav tau siv los tswj cov dej thiab ua kom huv. Thawj txoj kev yog ua rau muaj pov tseg cov khoom siv dej thiab tsis yooj yim ua haujlwm. Lub ntsiab lus tseem ceeb yog tias cov dej tsuas yog nyob saum npoo, thiab kev khiav dej sab hauv yog tseem tsis tiav. Yog li ntawd, txoj kev daws rau cov teeb meem no yog ntxiv yim dej-tuav cov neeg sawv cev rau lub tshuaj khib. Feem ntau, hydroxypropyl yog xaiv. Methyl lossis methyl cellulose, viscosity specification yog nruab nrab ntawm 20000-6000000Cps, thiab qhov kev sib ntxiv yog 2% -3%. Cov dej tswj kav tuaj yeem khaws tau nce ntxiv rau ntau dua 85%. Cov txheej txheem ntawm kev siv nyob rau hauv coll qhob yog kom sib xyaw cov hmoov qhuav hmoov thiab muab nws tso rau hauv dej.
4. Nyob rau hauv plastering gypsum, tsevneeg ua tsev gypsum, thiab caulking gypsum: nrog kev tsim kho nrawm nrawm ntawm kev tsim kho, tib neeg qhov kev thov kom cov khoom tshiab kuj tseem nce ntxiv. Vim tias qhov nce ntawm tib neeg txoj kev paub txog kev tiv thaiv ib puag ncig thiab kev txhim kho txuas ntxiv ntawm kev tsim kho, nyem cov khoom siv gypsum tau tsim sai. Tam sim no, feem ntau cov gypsum feem ntau yog plastering gypsum, sib khi gypsum, inlaid gypsum, thiab pobzeb nplaum. Plastering gypsum yog lub tshuab nqus hluav taws xob zoo rau sab hauv phab ntsa thiab qab nthab. Phab ntsa deg plastered nrog nws yog qhov zoo thiab du. Lub Tsev Tshiab Chaw Tsim Tsa Khoom nplaum yog cov khoom nplaum ua los ntawm gypsum raws li ntau cov khoom sib ntxiv. Nws yog qhov tsim nyog rau kev sib raug zoo ntawm ntau cov khoom siv phab ntsa hauv tsev. Nws tsis yog-lom, tsis muaj ntxhiab, lub zog thaum ntxov, kev sib raug zoo, nws yog ib qho khoom siv txhawb nqa rau kev tsim tsa cov laug cam thiab thaiv kev tsim kho; Gypsum Caulking tus neeg sawv cev yog ib tug gap muab tub lim ntawm gypsum laug cam thiab kho cov muab tub lim rau cov phab ntsa thiab cov kab nrib pleb. Cov khoom lag luam gypsum no muaj cov lus sib txawv ntawm cov haujlwm sib txawv. Ntxiv nrog rau lub luag haujlwm ntawm Gypsum thiab lwm cov fillers, qhov teeb meem tseem ceeb yog tias cov cellulose ntxiv ether additive ua lub luag haujlwm. Txij li gypsum tau muab faib ua anhydrous gypsum thiab Hemihydrate Gypsum, kom muaj kev sib tw, dej rov qab txiav txim siab qhov zoo ntawm gypsum cov ntaub ntawv hauv tsev. Cov teeb meem tshwm sim ntawm cov ntaub ntawv no yog hollowing thiab tawg, thiab thawj lub zog tsis tuaj yeem hu tau. Txhawm rau kom daws tau qhov teeb meem no, nws yog xaiv cov hom cellulose thiab cov qauv siv hloov tshiab ntawm Retarder. Hauv qhov no, methyl lossis hydroxypropyl pthyl 30000 feem ntau xaiv. -60000CPS, qhov nyiaj ntxiv yog 1.5% -2%. Ntawm lawv, cellulose tsom rau kev tswj kav dej thiab retarding lubrication. Txawm li cas los xij, nws tsis yooj yim sua kom cia siab rau ntawm cellulose ether raws li ib tug retarder, thiab nws yog qhov tsim nyog los sib tov thiab siv yam tsis cuam tshuam rau thawj lub zog. Dej khaws cia feem ntau yog hais txog ntau npaum li cas dej yuav ploj mus ib txwm tsis muaj dej nqus dej. Yog tias lub phab ntsa qhuav dhau, kev nqus dej thiab ntuj evaporation rau ntawm cov khoom ntom ntom ntom ntom ntom ntom nrawm, thiab hollowing thiab tawg yuav tshwm sim. Hom no ntawm kev siv yog tov nrog hmoov qhuav. Yog tias koj npaj kev daws teeb meem, thov saib txoj kev npaj ntawm kev daws teeb meem.
5. Rwb thaiv cov kab cug sib nphoo yog lub hom phab ntsa hluav taws xob sab hauv phab ntsa sab hauv sab qaum teb. Nws yog cov duab hluav taws xob synthesized los ntawm rwb thaiv tsev cov khoom, tshuaj khib thiab siv. Hauv cov khoom siv no, cellulose ua lub luag haujlwm tseem ceeb hauv kev sib raug zoo thiab ua kom muaj zog. Feem ntau xaiv methyl cellulose nrog siab viscosity (txog 10000EPs), cov tshuaj ntau) yog feem ntau ntawm 2 ‰ -3 ‰), thiab lub hau kev siv yog hmoov nplej qhuav.
6. Tus neeg sawv cev cuam tshuam xaiv HPNC 20,000 CPS raws li tus neeg sab hauv, thiab ntau dua li cov neeg sawv cev tuab dua hauv lub zog, uas tuaj yeem txhim kho lub zog tensile thiab tiv thaiv lub zog. Siv los ua cov neeg sawv cev hauv dej hauv cov vuas vuas los tiv thaiv cov vuas los tiv thaiv cov dej tsis ntev thiab poob tawm.
Lub Sijhawm Post: Feb-18-2023