Cellulose ether (CelluloseEther) yog ua los ntawm cellulose los ntawm kev sib xyaw ua ke ntawm ib lossis ntau tus neeg sawv cev etherification thiab kev sib tsoo qhuav. Raws li cov qauv tshuaj sib txawv ntawm ether substituents, cellulose ethers tuaj yeem muab faib ua anionic, cationic thiab nonionic ethers. Ionic cellulose ethers feem ntau suav nrog carboxymethyl cellulose ether (CMC); non-ionic cellulose ethers feem ntau suav nrog methyl cellulose ether (MC), hydroxypropyl methyl cellulose ether (HPMC) thiab hydroxyethyl cellulose ether. Chlorine ether (HC) thiab lwm yam. Non-ionic ethers raug muab faib ua ethers uas yaj hauv dej thiab ethers uas yaj hauv roj, thiab non-ionic water-soluble ethers feem ntau yog siv rau hauv cov khoom siv mortar. Nyob rau hauv qhov muaj calcium ions, ionic cellulose ether tsis ruaj khov, yog li nws tsis tshua siv rau hauv cov khoom siv mortar qhuav uas siv cement, slaked lime, thiab lwm yam ua cov khoom siv cementing. Cov cellulose ethers uas yaj tau hauv dej uas tsis yog ionic yog siv dav hauv kev lag luam khoom siv hauv tsev vim lawv qhov kev ruaj khov thiab kev khaws cia dej.
1. Cov khoom siv tshuaj lom neeg ntawm cellulose ether
Txhua lub cellulose ether muaj cov qauv yooj yim ntawm cellulose - anhydroglucose qauv. Hauv cov txheej txheem ntawm kev tsim cov cellulose ether, cov cellulose fiber thawj zaug raug cua sov hauv cov kua alkaline, thiab tom qab ntawd kho nrog tus neeg sawv cev etherifying. Cov khoom siv fibrous reaction yog purified thiab pulverized los ua cov hmoov sib xws nrog qee qhov fineness.
Hauv cov txheej txheem ntau lawm ntawm MC, tsuas yog methyl chloride siv ua tus neeg sawv cev etherification; ntxiv rau methyl chloride, propylene oxide kuj tseem siv los tau txais cov pab pawg hydroxypropyl substituent hauv kev tsim HPMC. Ntau yam cellulose ethers muaj cov piv sib txawv methyl thiab hydroxypropyl hloov pauv, uas cuam tshuam rau qhov sib xws ntawm cov organic thiab qhov kub thiab txias ntawm cov cellulose ether.
2. Cov xwm txheej siv ntawm cellulose ether
Cellulose ether yog ib qho polymer uas tsis yog ionic semi-synthetic, uas yog dej-soluble thiab solvent-soluble. Nws muaj cov teebmeem sib txawv hauv ntau yam lag luam. Piv txwv li, hauv cov khoom siv tshuaj lom neeg hauv tsev, nws muaj cov teebmeem sib xyaw ua ke hauv qab no:
①Tus neeg sawv cev khaws dej ②Thickener ③Cov khoom sib npaug ④Cov khoom tsim zaj duab xis ⑤Cov khoom khi
Hauv kev lag luam polyvinyl chloride, nws yog ib qho emulsifier thiab dispersant; hauv kev lag luam tshuaj, nws yog ib qho binder thiab qeeb thiab tswj cov khoom siv tso tawm, thiab lwm yam. Vim tias cellulose muaj ntau yam kev sib xyaw ua ke, nws daim ntawv thov Lub teb kuj yog qhov dav tshaj plaws. Cov hauv qab no tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.
(1) Hauv cov xim latex:
Hauv kev lag luam pleev xim latex, xaiv hydroxyethyl cellulose, qhov kev qhia dav dav ntawm qhov sib npaug viscosity yog RT30000-50000cps, uas sib raug rau qhov kev qhia ntawm HBR250, thiab qhov kev siv tshuaj feem ntau yog li 1.5‰-2‰. Lub luag haujlwm tseem ceeb ntawm hydroxyethyl hauv cov xim latex yog kom tuab, tiv thaiv kev gelation ntawm cov xim, pab kom cov xim dispersion, qhov ruaj khov ntawm cov latex, thiab ua kom cov viscosity ntawm cov khoom, uas pab txhawb rau kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yooj yim dua rau siv. Nws tuaj yeem yaj hauv dej txias thiab dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi pH. Nws tuaj yeem siv nrog kev thaj yeeb nyab xeeb thaum tus nqi PI yog ntawm 2 thiab 12. Cov txheej txheem siv yog raws li nram no: I. Ntxiv ncaj qha rau hauv kev tsim khoom: Rau txoj kev no, hydroxyethyl cellulose qeeb hom yuav tsum tau xaiv, thiab hydroxyethyl cellulose nrog lub sijhawm yaj ntau dua 30 feeb yog siv. Cov kauj ruam yog raws li nram no: ① Muab tso rau hauv lub thawv uas muaj lub tshuab ua kom siab. Cov dej ntshiab ntau ② Pib do tas li ntawm qhov ceev qis, thiab tib lub sijhawm maj mam ntxiv hydroxyethyl rau hauv cov tshuaj kom sib npaug ③Txuas ntxiv do kom txog thaum tag nrho cov khoom siv granular tau ntub ④Ntxiv lwm yam khoom ntxiv thiab cov khoom ntxiv alkaline, thiab lwm yam. ⑤Do kom txog thaum tag nrho cov hydroxyethyl Lub hauv paus yaj tag, tom qab ntawd ntxiv lwm yam khoom hauv cov mis, thiab zom kom txog thaum cov khoom tiav. Ⅱ. Nruab nrog cov cawv niam rau kev siv tom qab: Txoj kev no tuaj yeem xaiv cov cellulose tam sim ntawd, uas muaj cov nyhuv tiv thaiv kab mob mildew. Qhov zoo ntawm txoj kev no yog tias nws muaj kev ywj pheej ntau dua thiab tuaj yeem ntxiv ncaj qha rau cov xim latex. Txoj kev npaj yog tib yam li cov kauj ruam ①-④. Ⅲ. Npaj porridge rau kev siv tom qab: Vim tias cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (insoluble) rau hydroxyethyl, cov kuab tshuaj no tuaj yeem siv los npaj porridge. Cov tshuaj organic uas siv ntau tshaj plaws yog cov kua organic hauv cov xim latex, xws li ethylene glycol, propylene glycol, thiab cov neeg sawv cev ua zaj duab xis (xws li diethylene glycol butyl acetate). Cov porridge hydroxyethyl cellulose tuaj yeem ntxiv ncaj qha rau hauv cov xim. Txuas ntxiv do kom txog thaum yaj tag.
(2) Hauv phab ntsa scraping putty:
Tam sim no, feem ntau ntawm cov nroog hauv kuv lub teb chaws, cov putty uas tsis muaj dej thiab tsis yooj yim txhuam tau raug suav tias yog cov neeg muaj nqis. Nws yog tsim los ntawm acetal reaction ntawm vinyl cawv thiab formaldehyde. Yog li ntawd, cov khoom no maj mam raug tshem tawm los ntawm cov neeg, thiab cov khoom cellulose ether series siv los hloov cov khoom no. Uas yog hais tias, rau kev tsim cov khoom siv hauv tsev uas tsis muaj dej, cellulose tam sim no yog tib yam khoom siv. Hauv cov putty uas tsis muaj dej, nws muab faib ua ob hom: hmoov qhuav putty thiab putty paste. Ntawm ob hom putty no, yuav tsum xaiv methyl cellulose hloov kho thiab hydroxypropyl methyl. Qhov kev qhia viscosity feem ntau yog ntawm 30000-60000cps. Lub luag haujlwm tseem ceeb ntawm cellulose hauv putty yog kev khaws cia dej, kev sib txuas thiab kev ua kom lubrication. Txij li thaum cov qauv putty ntawm ntau lub tuam txhab tsim khoom sib txawv, qee qhov yog grey calcium, lub teeb calcium, dawb cement, thiab lwm yam, thiab qee qhov yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li cov lus qhia, viscosity thiab kev nkag mus ntawm cellulose hauv ob hom qauv kuj sib txawv. Tus nqi ntxiv yog li 2‰-3‰. Thaum tsim cov putty scraping phab ntsa, txij li thaum lub hauv paus ntawm phab ntsa muaj qee qib ntawm kev nqus dej (qhov nqus dej ntawm phab ntsa cib yog 13%, thiab qhov nqus dej ntawm cov pob zeb yog 3-5%), ua ke nrog kev ua pa ntawm lub ntiaj teb sab nraud, yog tias cov putty poob dej sai dhau, Nws yuav ua rau muaj kev tawg lossis tshem tawm hmoov, uas yuav ua rau lub zog ntawm cov putty tsis muaj zog. Yog li ntawd, ntxiv cellulose ether yuav daws qhov teeb meem no. Tab sis qhov zoo ntawm cov khoom sau, tshwj xeeb tshaj yog qhov zoo ntawm cov tshauv calcium kuj tseem ceeb heev. Vim yog qhov viscosity siab ntawm cellulose, qhov buoyancy ntawm cov putty kuj tau txhim kho, thiab qhov tshwm sim sagging thaum lub sijhawm tsim kho kuj raug zam, thiab nws yooj yim dua thiab txuag zog tom qab scraping. Nws yooj yim dua los ntxiv cellulose ether hauv cov hmoov putty. Nws cov khoom tsim thiab siv yooj yim dua. Cov khoom sau thiab cov khoom ntxiv tuaj yeem sib xyaw ua ke hauv cov hmoov qhuav.
(3) Cov tshuaj nplaum pob zeb:
Hauv cov pob zeb ua vaj tse, kom ua tiav qhov muaj zog tshaj plaws, cov cement yuav tsum tau hydrated tag nrho. Tshwj xeeb tshaj yog nyob rau hauv lub caij ntuj sov kev tsim kho, cov pob zeb ua vaj tse poob dej sai dhau, thiab cov kev ntsuas ntawm kev hydration tag nrho yog siv los tswj thiab sprinkle dej. Pov tseg cov peev txheej thiab kev ua haujlwm tsis yooj yim, qhov tseem ceeb yog tias dej tsuas yog nyob rau ntawm qhov chaw, thiab sab hauv hydration tseem tsis tiav, yog li qhov kev daws teeb meem rau qhov teeb meem no yog ntxiv yim tus neeg sawv cev dej-tuav rau hauv cov pob zeb ua vaj tse, feem ntau xaiv hydroxypropyl methyl lossis methyl Cellulose, qhov viscosity specification yog ntawm 20000-60000cps, thiab qhov ntxiv yog 2% -3%. Tus nqi khaws dej tuaj yeem nce mus txog ntau dua 85%. Txoj kev siv hauv cov pob zeb ua vaj tse yog sib tov cov hmoov qhuav sib npaug thiab nchuav nws rau hauv dej.
(4) Hauv kev siv plastering gypsum, bonded gypsum, caulking gypsum:
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 txhua hnub. Vim yog kev nce ntxiv ntawm tib neeg txoj kev paub txog kev tiv thaiv ib puag ncig thiab kev txhim kho tas mus li ntawm kev ua haujlwm ntawm kev tsim kho, cov khoom siv cementitious gypsum tau tsim kho sai. Tam sim no, cov khoom siv gypsum feem ntau yog plastering gypsum, bonded gypsum, inlaid gypsum, thiab vuas nplaum. Plastering gypsum yog cov khoom siv plastering zoo rau sab hauv phab ntsa thiab qab nthab. Qhov chaw ntawm phab ntsa uas plastered nrog nws yog qhov zoo thiab du. Lub tsev teeb pom kev zoo board nplaum tshiab yog cov khoom nplaum ua los ntawm gypsum ua cov khoom siv hauv paus thiab ntau yam ntxiv. Nws yog qhov tsim nyog rau kev sib txuas ntawm ntau yam khoom siv phab ntsa inorganic. Nws tsis muaj tshuaj lom, tsis muaj ntxhiab, lub zog thaum ntxov thiab teeb tsa sai, kev sib txuas muaj zog thiab lwm yam ntxwv, nws yog cov khoom txhawb nqa rau cov laug cam tsev thiab thaiv kev tsim kho; gypsum caulking tus neeg sawv cev yog qhov sib txawv ntawm gypsum boards thiab kho cov khoom siv rau phab ntsa thiab tawg. Cov khoom siv gypsum no muaj ntau yam haujlwm sib txawv. Ntxiv nrog rau lub luag haujlwm ntawm gypsum thiab cov khoom siv ntxiv, qhov teeb meem tseem ceeb yog tias cov cellulose ether ntxiv ua lub luag haujlwm tseem ceeb. Vim tias gypsum raug muab faib ua anhydrous gypsum thiab hemihydrate gypsum, gypsum sib txawv muaj cov teebmeem sib txawv rau kev ua haujlwm ntawm cov khoom, yog li thickening, dej khaws cia thiab retardation txiav txim siab qhov zoo ntawm gypsum tsev cov ntaub ntawv. Qhov teeb meem feem ntau ntawm cov ntaub ntawv no yog hollowing thiab tawg, thiab lub zog pib tsis tuaj yeem ncav cuag. Txhawm rau daws qhov teeb meem no, nws yog xaiv hom cellulose thiab cov tshuaj siv sib xyaw ntawm retarder. Hauv qhov no, methyl lossis hydroxypropyl methyl 30000 feem ntau raug xaiv. -60000cps, qhov ntxiv yog 1.5% -2%. Ntawm lawv, cellulose tsom mus rau kev khaws cia dej thiab retarding lubrication. Txawm li cas los xij, nws tsis yooj yim sua kom cia siab rau cellulose ether ua retarder, thiab nws yog qhov tsim nyog los ntxiv citric acid retarder los sib tov thiab siv yam tsis cuam tshuam rau lub zog pib. Kev khaws cia dej feem ntau hais txog ntau npaum li cas dej yuav ploj mus ntuj tsis muaj dej sab nraud nqus. Yog tias phab ntsa qhuav dhau, dej nqus thiab ntuj evaporation ntawm qhov chaw hauv paus yuav ua rau cov khoom poob dej sai dhau, thiab hollowing thiab tawg kuj yuav tshwm sim. Txoj kev siv no yog sib xyaw nrog hmoov qhuav. Yog koj npaj ib qho tshuaj, thov saib txoj kev npaj cov tshuaj.
(5) Cov tshuaj nplaum rwb thaiv tsev
Cov tshuaj nplaum rwb thaiv tsev yog ib hom khoom siv rwb thaiv tsev tshiab hauv thaj tsam sab qaum teb. Nws yog cov khoom siv phab ntsa uas tau tsim los ntawm cov khoom siv rwb thaiv tsev, tshuaj nplaum thiab cov khoom siv khi. Hauv cov khoom siv no, cellulose ua lub luag haujlwm tseem ceeb hauv kev sib txuas thiab ua kom muaj zog. Feem ntau xaiv methyl cellulose nrog viscosity siab (kwv yees li 10000eps), qhov ntau npaum li cas feem ntau yog ntawm 2‰-3‰), thiab txoj kev siv yog sib tov hmoov qhuav.
(6) tus neeg sawv cev sib txuas lus
Xaiv HPNC 20000cps rau tus neeg sawv cev sib txuas, xaiv 60000cps lossis ntau dua rau cov nplaum pobzeb, thiab tsom mus rau cov khoom ua kom tuab hauv tus neeg sawv cev sib txuas, uas tuaj yeem txhim kho lub zog tensile thiab lub zog tiv thaiv xub. Siv ua tus neeg sawv cev khaws dej hauv kev sib txuas ntawm cov pobzeb kom tiv thaiv cov pobzeb kom tsis txhob qhuav sai thiab poob tawm.
3. Qhov xwm txheej ntawm kev lag luam
(1) Kev lag luam sab saud
Cov khoom siv tseem ceeb uas xav tau rau kev tsim cov cellulose ether suav nrog paj rwb ua kom zoo (lossis ntoo pulp) thiab qee cov tshuaj yaj tshuaj, xws li propylene oxide, methyl chloride, kua caustic soda, caustic soda, ethylene oxide, toluene thiab lwm yam khoom siv pabcuam. Cov lag luam kev lag luam sab saud ntawm kev lag luam no suav nrog paj rwb ua kom zoo, cov lag luam tsim cov ntoo pulp thiab qee cov lag luam tshuaj lom neeg. Kev hloov pauv ntawm tus nqi ntawm cov khoom siv tseem ceeb saum toj no yuav muaj ntau qib ntawm kev cuam tshuam rau tus nqi tsim khoom thiab tus nqi muag ntawm cellulose ether.
Tus nqi ntawm cov paj rwb ua kom zoo yog qhov siab heev. Piv txwv li, piv txwv li, thaum lub sijhawm tshaj tawm, tus nqi ntawm cov paj rwb ua kom zoo suav txog 31.74%, 28.50%, 26.59% thiab 26.90% ntawm tus nqi muag khoom ntawm cov khoom siv hauv tsev cellulose ether. Kev hloov pauv ntawm tus nqi ntawm cov paj rwb ua kom zoo yuav cuam tshuam rau tus nqi tsim khoom ntawm cellulose ether. Cov khoom siv tseem ceeb rau kev tsim cov paj rwb ua kom zoo yog cov paj rwb linters. Cov paj rwb linters yog ib qho ntawm cov khoom lag luam hauv cov txheej txheem tsim paj rwb, feem ntau yog siv los tsim cov paj rwb pulp, paj rwb ua kom zoo, nitrocellulose thiab lwm yam khoom. Tus nqi siv thiab kev siv cov paj rwb linters thiab paj rwb sib txawv heev, thiab nws tus nqi qis dua li paj rwb, tab sis nws muaj qee qhov kev sib raug zoo nrog kev hloov pauv ntawm tus nqi ntawm paj rwb. Kev hloov pauv ntawm tus nqi ntawm cov paj rwb linters cuam tshuam rau tus nqi ntawm cov paj rwb ua kom zoo.
Qhov kev hloov pauv sai ntawm tus nqi ntawm cov paj rwb ua kom zoo yuav muaj ntau qib sib txawv ntawm kev cuam tshuam rau kev tswj hwm cov nqi tsim khoom, tus nqi khoom thiab kev ua lag luam ntawm cov tuam txhab hauv kev lag luam no. Thaum tus nqi ntawm cov paj rwb ua kom zoo siab thiab tus nqi ntawm cov ntoo pulp pheej yig, txhawm rau kom txo tus nqi, cov ntoo pulp tuaj yeem siv los ua tus hloov pauv thiab ntxiv rau cov paj rwb ua kom zoo, feem ntau yog rau kev tsim cov cellulose ethers nrog viscosity qis xws li tshuaj thiab cov khoom noj khoom haus cellulose ethers. Raws li cov ntaub ntawv los ntawm lub vev xaib ntawm Lub Chaw Haujlwm Saib Xyuas Kev Txheeb Xyuas Hauv Tebchaws, xyoo 2013, thaj chaw cog paj rwb hauv kuv lub tebchaws yog 4.35 lab hectares, thiab cov paj rwb hauv tebchaws yog 6.31 lab tons. Raws li cov ntaub ntawv los ntawm Tuam Tshoj Cellulose Industry Association, xyoo 2014, tag nrho cov khoom tsim tawm ntawm cov paj rwb ua kom zoo uas tsim los ntawm cov chaw tsim khoom loj hauv tsev ua paj rwb ua kom zoo yog 332,000 tons, thiab cov khoom siv raw muaj ntau heev.
Cov khoom siv tseem ceeb rau kev tsim cov khoom siv tshuaj graphite yog hlau thiab graphite carbon. Tus nqi ntawm hlau thiab graphite carbon yog tus nqi siab ntawm cov khoom siv tshuaj graphite. Kev hloov pauv ntawm tus nqi ntawm cov khoom siv no yuav muaj qee qhov cuam tshuam rau tus nqi tsim khoom thiab tus nqi muag khoom ntawm cov khoom siv tshuaj graphite.
(2) Kev lag luam downstream ntawm cellulose ether
Raws li "kev lag luam monosodium glutamate", cellulose ether muaj feem tsawg ntawm cellulose ether thiab muaj ntau yam kev siv. Cov kev lag luam downstream tau tawg ua ntau qhov chaw hauv lub neej hauv lub tebchaws kev lag luam.
Feem ntau, kev lag luam tsim kho thiab kev lag luam vaj tse yuav muaj qee qhov cuam tshuam rau qhov kev loj hlob ntawm kev thov rau cov khoom siv hauv tsev cellulose ether. Thaum kev lag luam tsim kho hauv tsev thiab kev lag luam vaj tse loj hlob sai, kev thov hauv khw hauv tsev rau cov khoom siv hauv tsev cellulose ether loj hlob sai. Thaum qhov kev loj hlob ntawm kev lag luam tsim kho hauv tsev thiab kev lag luam vaj tse qeeb qeeb, qhov kev loj hlob ntawm kev thov rau cov khoom siv hauv tsev cellulose ether hauv kev lag luam hauv tsev yuav qeeb qeeb, uas yuav ua rau kev sib tw hauv kev lag luam no nce ntxiv thiab ua kom cov txheej txheem ntawm kev ciaj sia ntawm cov tuam txhab hauv kev lag luam no sai dua.
Txij li xyoo 2012, nyob rau hauv cov ntsiab lus ntawm kev qeeb hauv kev lag luam kev tsim kho hauv tsev thiab kev lag luam vaj tse, qhov kev thov rau cov khoom siv hauv tsev qib cellulose ether hauv kev lag luam hauv tsev tsis tau hloov pauv ntau. Cov laj thawj tseem ceeb yog: 1. Qhov loj me ntawm kev lag luam kev tsim kho hauv tsev thiab kev lag luam vaj tse yog loj, thiab tag nrho cov kev thov hauv kev lag luam yog qhov loj heev; lub khw muag khoom siv tseem ceeb ntawm cov khoom siv hauv tsev qib cellulose ether maj mam nthuav dav los ntawm thaj chaw tsim kho kev lag luam thiab thawj- thiab thib ob-tier nroog mus rau hauv nruab nrab thiab sab hnub poob cheeb tsam thiab thib peb-tier nroog, kev loj hlob ntawm kev thov hauv tsev thiab qhov chaw nthuav dav; 2. Qhov feem pua ntawm cellulose ether ntxiv rau hauv tus nqi ntawm cov khoom siv hauv tsev yog qis, thiab tus nqi siv los ntawm ib tus neeg siv khoom yog me me, thiab cov neeg siv khoom tau tawg, uas yog qhov yooj yim rau kev thov nruj, thiab tag nrho cov kev thov hauv kev lag luam downstream yog qhov ruaj khov; 3. Kev hloov pauv ntawm tus nqi hauv khw yog ib qho tseem ceeb uas cuam tshuam rau kev hloov pauv ntawm cov qauv kev thov ntawm cov khoom siv hauv tsev qib cellulose ether. Txij li xyoo 2012, tus nqi muag khoom ntawm cov khoom siv hauv tsev qib cellulose ether tau poob qis heev, uas ua rau tus nqi ntawm cov khoom nruab nrab mus rau qib siab poob qis, nyiam ntau tus neeg siv khoom los yuav thiab xaiv, ua rau muaj kev thov rau cov khoom nruab nrab mus rau qib siab, thiab ua rau kev thov ua lag luam thiab qhov chaw nqi rau cov qauv ib txwm muaj.
Qib kev loj hlob ntawm kev lag luam tshuaj thiab kev loj hlob ntawm kev lag luam tshuaj yuav cuam tshuam rau qhov kev thov rau cov tshuaj cellulose ether. Kev txhim kho ntawm cov neeg lub neej thiab kev lag luam zaub mov uas tau tsim kho zoo yog qhov ua rau kev xav tau ntawm kev lag luam rau cov khoom noj cellulose ether.
4. Kev Loj Hlob ntawm Cellulose Ether
Vim muaj qhov sib txawv ntawm cov qauv hauv kev thov ua lag luam rau cellulose ether, cov tuam txhab uas muaj lub zog thiab qhov tsis muaj zog sib txawv tuaj yeem nyob ua ke. Vim muaj qhov sib txawv ntawm cov qauv ntawm kev thov ua lag luam, cov tuam txhab tsim khoom hauv tsev cellulose ether tau siv cov tswv yim sib tw sib txawv raws li lawv lub zog, thiab tib lub sijhawm, lawv yuav tsum nkag siab txog kev txhim kho thiab kev coj ua ntawm kev ua lag luam zoo.
(1) Kev ua kom ruaj khov ntawm cov khoom zoo tseem yuav yog qhov tseem ceeb ntawm kev sib tw ntawm cov tuam txhab cellulose ether
Cellulose ether suav txog ib feem me me ntawm cov nqi tsim khoom ntawm feem ntau cov lag luam downstream hauv kev lag luam no, tab sis nws muaj kev cuam tshuam loj rau qhov zoo ntawm cov khoom. Cov neeg siv khoom nruab nrab mus rau qib siab yuav tsum dhau los ntawm kev sim mis ua ntej siv qee hom cellulose ether. Tom qab tsim cov mis ruaj khov, feem ntau nws tsis yooj yim los hloov lwm hom khoom, thiab tib lub sijhawm, cov kev xav tau siab dua tau muab tso rau ntawm qhov ruaj khov zoo ntawm cellulose ether. Qhov xwm txheej no muaj ntau dua hauv cov teb siab xws li cov chaw tsim khoom siv loj hauv tsev thiab txawv teb chaws, cov tshuaj excipients, cov khoom noj khoom haus ntxiv, thiab PVC. Txhawm rau txhim kho kev sib tw ntawm cov khoom, cov chaw tsim khoom yuav tsum xyuas kom meej tias qhov zoo thiab ruaj khov ntawm ntau pawg ntawm cellulose ether uas lawv muab tuaj yeem tswj tau ntev, yog li tsim kom muaj lub koob npe nrov hauv kev lag luam zoo dua.
(2) Kev txhim kho qib ntawm cov khoom siv thev naus laus zis yog qhov kev coj ua ntawm cov tuam txhab cellulose ether hauv tsev
Nrog rau kev siv tshuab tsim khoom ntawm cellulose ether uas paub tab zuj zus, qib siab dua ntawm kev siv tshuab yog qhov zoo rau kev txhim kho kev sib tw ntawm cov tuam txhab thiab kev tsim kom muaj kev sib raug zoo nrog cov neeg siv khoom ruaj khov. Cov tuam txhab cellulose ether uas paub zoo hauv cov teb chaws tsim kho feem ntau siv txoj kev sib tw ntawm "ntsib cov neeg siv khoom loj + tsim kev siv thiab kev siv downstream" los tsim cov cellulose ether siv thiab cov qauv siv, thiab teeb tsa cov khoom raws li cov teb thov sib txawv los pab cov neeg siv khoom siv, thiab los txhawb kev thov lag luam downstream. Kev sib tw ntawm cov tuam txhab cellulose ether hauv cov teb chaws tsim kho tau mus los ntawm kev nkag mus rau kev sib tw hauv thaj chaw ntawm kev siv tshuab.
Lub sijhawm tshaj tawm: Lub Ob Hlis-27-2023