Cellulose ether yog tsis yog-ionic semi-synthetic high molecular polymular, uas yog dej-soluble thiab 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:
①Wwater khaws tus neeg sawv cev ②tickener ntawm cov khoom ntiag tug ④film ua cov cuab yeej ⑤binder
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. Hauv qab no tsom rau kev siv thiab ua haujlwm ntawm cellulose ether hauv ntau cov ntaub ntawv hauv tsev.
(1) Hauv cov xim huv huv:
Hauv kev lag luam ntawm lhuab kev lag luam, kom xaiv hydroxyethyl cellulose, qhov kev sib raug zoo ntawm cov viscosity ntawm HBR250, thiab cov kev siv tshuaj ntau ntau ntxiv txog 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 viscing kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yog qhov yooj yim dua los siv. Nws tuaj yeem raug ntiab tawm hauv dej txias thiab 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 nyob rau hauv ntau lawm: Cov qauv no yuav tsum xaiv hydroxyethyl cellulose qeeb, thiab hydroxyethyl cellulose nrog ntau dua 30 feeb, nws cov kauj ruam yog raws li hauv qab no:
①prepare Qhov ntau ntawm cov dej lim hauv ib lub taub ntim nrog lub siab-shear agitator
②start mus txuas txuas ntxiv ntawm qhov nrawm nrawm, thiab tib lub sijhawm maj mam ntxiv hydroxyethyl rau kev daws qhov tsis muaj tseeb
③Continue ntaus kom txog thaum txhua cov ntaub ntawv granular yog soaked
④ Ntxiv lwm yam kev ntxiv ntxiv thiab cov khoom ntxiv yooj yim, thiab lwm yam.
Do do kom txog thaum txhua pab pawg hydroxyethyl yog yaj tag, ces ntxiv lwm cov khoom 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) hauv phab ntsa scraping putty:
Tam sim no, nyob hauv ntau lub nroog hauv kuv lub tebchaws, cov dej-tiv taus thiab txhuam-resistant ib puag ncig-phooj ywg putty tau muaj txiaj ntsig los ntawm cov neeg. Nws yog tsim los ntawm acetal cov tshuaj tiv thaiv ntawm vinyl 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) Qhob cug:
Nyob rau hauv cov chaw sib khib, 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. Cov khoom pov tseg thiab kev ua haujlwm tsis yooj yim, qhov kev daws teeb meem yog tseem tsis tiav, thiab kev daws teeb meem rau lub tshuaj khib nyiab rau lub ntsej muag. Feem ntau xaiv HydroxyPropyl methyl Los yog methyl cellulose, viscosity specification yog nruab nrab ntawm xyoo 20000-6000000Cps, thiab tus nqi 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, sib khi ua gypsum, caulking gypsum:
Nrog rau kev txhim kho sai ntawm kev tsim kho kev tsim kho, cov neeg xav tau rau cov ntaub ntawv hauv tsev tshiab kuj tseem nce hnub ib hnub. Vim tias qhov nce ntawm tib neeg qhov kev tiv thaiv ntawm ib puag ncig kev tiv thaiv ib puag ncig thiab kev txhim kho txuas ntxiv ntawm kev tsim kho, nyem cov khoom noj 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) thermal rwb thaiv tsev cug
Rwb thaiv kev cap yog ib hom tshiab ntawm phab ntsa sab hauv phab ntsa sab hauv phab ntsa hauv sab hauv sab qaum teb cheeb tsam. 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 HPNnc 20000cps rau tus neeg sawv cev sab hauv, xaiv 60000CPS lossis ntau dua rau cov tuab tuab rau cov neeg sawv cev hauv lub zog thiab cov xub ntiag los 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-16-2023