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:
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:
I.Add ncaj qha hauv kev tsim khoom: 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:
① Tso qee qhov dej ntshiab hauv cov thawv ntim nrog lub siab-txiab tov
②start mus txuas txuas ntxiv ntawm kev nrawm nrawm, thiab tib lub sijhawm maj mam ntxiv hydroxyethyl rau kev daws qhov tsis meej
③Continue sib xyaw kom txog thaum txhua tus granules yog soaked
④add lwm yam kev sib ntxiv thiab cov khoom ntxiv yooj yim, thiab lwm yam.
⑤stir kom txog thaum txhua pab pawg hydroxyethyl tau tag nrho cov pab pawg ua tiav, tom qab ntawd 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.
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. Khib ntawm cov peev txheej thiab tsis zoo ua haujlwm. Tus yuam sij yog tias cov dej tsuas yog nyob rau saum npoo, thiab txoj kev hydration 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 methyletyl lossis viscosity speculose 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 nruab nrab ntawm 1.5% thiab 2%, thiab kev tsom xam ntawm cellulose yog dej khaws cia 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 feem ntau yog nruab nrab ntawm 2% -3%, thiab cov qauv ntawm kev siv yog hmoov nplej qhuav.
(6) tus neeg sawv cev cuam tshuam
Xaiv HPMC 20000cps rau tus neeg sawv cev hauv lub cev, xaiv 60000CPS lossis ntau dua rau cov nplais uas muaj zog, thiab muaj zog txhim kho 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-02-2023