Cellulose ether (cellulosic ether) yog tsim los ntawm cellulose los ntawm etherification cov tshuaj tiv thaiv thiab ziab hmoov ntawm ib los yog ob peb etherifying agents. Raws li cov qauv tshuaj sib txawv ntawm ether hloov pauv, cellulose ether tuaj yeem muab faib ua anionic, cationic thiab non-ionic ether. Ionic cellulose ether tsuas yog carboxymethyl cellulose ether (CMC); Tsis yog-ionic cellulose ether feem ntau yog methyl cellulose ether (MC), hydroxypropyl methyl cellulose ether (HPMC) thiab hydroxyethyl cellulose ether (HC). Non-ionic ether muab faib ua dej-soluble ether thiab roj-soluble ether, uas tsis yog-ionic dej-soluble ether feem ntau yog siv rau hauv cov khoom khib nyiab. Nyob rau hauv lub xub ntiag ntawm calcium ions, ionic cellulose ether tsis ruaj khov, yog li nws tsis tshua muaj siv nyob rau hauv qhuav mix mortar khoom nrog xis mas, hydrated txiv qaub thiab lwm yam ntaub ntawv cementing. Non-ionic dej-soluble cellulose ether yog dav siv nyob rau hauv lub tsev cov ntaub ntawv kev lag luam vim hais tias ntawm nws suspension stability thiab dej tuav.
1. Cov khoom siv tshuaj ntawm cellulose ether
Txhua cellulose ether muaj cov qauv hauv paus ntawm cellulose - lub cev qhuav dej qabzib. Nyob rau hauv tus txheej txheem ntawm tsim cellulose ether, cellulose fiber yog rhuab nyob rau hauv alkaline tov ua ntej, thiab ces kho nrog etherifying tus neeg saib xyuas. Cov tshuaj tiv thaiv fibrous yog purified thiab hauv av los tsim cov hmoov sib xws nrog ib qho kev nplua nuj.
Hauv kev tsim khoom ntawm MC, tsuas yog methane chloride yog siv los ua tus neeg sawv cev etherifying. HPMC ntau lawm ntxiv rau kev siv cov tshuaj methane chloride, tab sis kuj siv propylene oxide kom tau hydroxypropyl pab pawg neeg hloov. Ntau yam cellulose ethers muaj ntau yam methyl thiab hydroxypropyl hloov pauv, uas cuam tshuam rau solubility ntawm cellulose ethers thiab cov khoom ntawm kub gel kub.
2. Daim ntawv thov scenarios ntawm cellulose ether
Cellulose ether yog non-ionic semi-synthetic polymer, dej-soluble thiab hnyav ob, nyob rau hauv ntau industries tshwm sim los ntawm lub luag hauj lwm yog txawv, xws li nyob rau hauv cov tshuaj siv tsev cov ntaub ntawv, nws muaj cov nram qab no compound nyhuv:
① dej tuav tus neeg saib xyuas ② thickening agent ③ leveling ④ zaj duab xis tsim ⑤ binder
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. Cov hauv qab no tsom rau kev siv cellulose ether hauv ntau yam khoom siv hauv tsev thiab lub luag haujlwm.
(1) Hauv cov xim latex:
Nyob rau hauv cov xim xim latex, xaiv hydroxyethyl cellulose, cov ntsiab lus dav dav ntawm viscosity yog RT3000-50000cps, nws sib haum rau HBR250 specifications, qhov siv ntau npaum li cas 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, ob qho tib si dej txias thiab dej kub tuaj yeem yaj, thiab tsis cuam tshuam los ntawm tus nqi PH. Nws tuaj yeem siv tau zoo nyob nruab nrab ntawm PH tus nqi 2 thiab 12. Peb txoj kev hauv qab no yog siv: Rau txoj kev no, ncua hydroxyethyl cellulose nrog lub sijhawm tawg ntawm ntau tshaj 30 feeb yuav tsum tau xaiv. Cov txheej txheem yog raws li hauv qab no: (1) kom muaj siab yuav tsum txiav lub khob ntim kom muaj nuj nqis ntawm cov dej ntshiab (2) lub zog sab hauv ntawm tib neeg pib sib tov qis, hydroxyethyl uniform maj mam tib lub sij hawm los koom rau hauv kev daws teeb meem (3) txuas ntxiv mus kom txog rau thaum tag nrho 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 lwm cov khoom xyaw ntawm cov mis, sib tsoo rau cov khoom tiav. ⅱ, nrog niam cawv hou siv: txoj kev no tuaj yeem xaiv hom instant, thiab muaj cov nyhuv ntawm mildew pov thawj cellulose. 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. ⅲ, nrog porridge siv: vim cov kuab tshuaj organic yog cov kuab tshuaj phem rau hydroxyethyl (insoluble) yog li koj tuaj yeem siv cov kuab tshuaj no los npaj cov 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 teebmeem. 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. Nyob rau hauv hmoov putty, cellulose ether yuav tsum tsim nyog ntxiv rau lub Hoobkas taw tes, nws ntau lawm, siv yog yooj yim dua, sau cov ntaub ntawv thiab auxiliary qhuav hmoov tuaj yeem sib tov sib xyaw, kev tsim kho yooj yim dua, qhov chaw faib dej, ntau npaum li cas.
(3) Pob zeb 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 hydration tseem tsis yog tag nrho, yog li txoj hauv kev los daws qhov teeb meem no, Ntxiv yim tus neeg tuav dej tuav cellulose hauv mortar pob zeb xaiv hydroxypropyl methyl lossis methyl cellulose, viscosity specifications hauv 20000- 60000cps ntawm, ntxiv 2%-3%. Txog, cov dej tuav tus nqi tuaj yeem nce mus rau ntau dua 85%, hauv mortar pob zeb siv txoj kev rau cov hmoov qhuav sib tov sib xyaw tom qab lub qhov ncauj mus rau hauv dej tuaj yeem ua tau.
(4)Gypsumplaster, sib txuas plaster, caulking plaster:
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. Plastering plaster yog ib hom zoo zoo sab hauv phab ntsa thiab ru tsev plastering cov ntaub ntawv, nrog nws 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 ntxiv dag zog lub qhov ncauj tus neeg sawv cev ua los ntawm cov khoom nplaum, nws yog tsim rau txhua yam ntawm cov khoom siv hauv tsev inorganic ntawm daim ntawv cog lus, nrog cov tsis muaj tshuaj lom. , tasteless, thaum ntxov lub zog ceev ceev, kev sib txuas lus yog lub tsev board, 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. Vim hais tias gesso muab faib tsis muaj dej gesso thiab ib xees ntawm ib nrab dej gesso, sib txawv gesso yog txawv rau cov kev ua tau zoo ntawm cov khoom, nce li tuab, tiv thaiv dej, qeeb coagulate qhov zoo uas txiav txim siab gesso tsev cov ntaub ntawv. Qhov teeb meem tshwm sim ntawm cov ntaub ntawv no yog hollow nruas cracking, lub zog pib yog tsis mus txog, los daws qhov teeb meem no, yog xaiv hom cellulose thiab retarder 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%. Nyob nruab nrab, lub hom phiaj ntawm cellulose yog dej tuav thiab qeeb condensation 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) Tus neeg saib xyuas interface
Tus neeg saib xyuas kev sib txuas yog HPMC200000cps, 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. Nyob rau hauv cov pobzeb sib txuas cov dej tuav tus neeg saib xyuas kom tiv thaiv cov pobzeb los ntawm kev poob dej sai heev.
3. Kev lag luam saw
(1) Upstream kev lag luam
Cov ntaub ntawv tseem ceeb rau kev tsim cov cellulose ether suav nrog cov paj rwb zoo (lossis ntoo pulp) thiab qee cov tshuaj hnyav, xws li propylene oxide, chloromethane, kua alkali, ntsiav tshuaj alkali, ethylene oxide, toluene thiab lwm yam khoom siv. Cov kev lag luam sab saud ntawm qhov kev lag luam no suav nrog cov paj rwb zoo, cov chaw tsim khoom ntoo thiab qee cov tuam txhab tshuaj. Kev hloov pauv ntawm tus nqi ntawm cov khoom siv tseem ceeb uas tau hais los saum toj no yuav muaj qhov sib txawv ntawm cov nqi tsim khoom thiab muag tus nqi ntawm cellulose ether.
Refined paj rwb nqi kuj yog siab. Siv cov khoom siv hauv tsev qib cellulose ether ua piv txwv, thaum lub sijhawm tshaj tawm, qhov feem pua ntawm cov paj rwb ua kom zoo nkauj hauv cov khoom siv qib cellulose ether muag yog 31.74%, 28.50%, 26.59% thiab 26.90%, feem. Tus nqi hloov pauv ntawm cov paj rwb refined yuav cuam tshuam tus nqi ntawm cellulose ether. Cov khoom siv tseem ceeb ntawm kev tsim cov paj rwb refined yog paj rwb staple. Paj rwb staple yog ib qho ntawm cov khoom lag luam hauv cov paj rwb, feem ntau yog siv los ua paj rwb pulp, refined paj rwb, nitrocellulost thiab lwm yam khoom. Kev siv tus nqi thiab siv cov paj rwb staple txawv ntawm cov paj rwb, thiab nws cov nqi yog pom tseeb qis dua li paj rwb, tab sis nws muaj qee qhov sib cuam tshuam nrog kev hloov pauv ntawm cov paj rwb. Tus nqi hloov pauv ntawm paj rwb staple yuav cuam tshuam rau tus nqi ntawm cov paj rwb refined.
Qhov kev sib hloov ntawm kev ua kom zoo nkauj ntawm cov paj rwb yuav cuam tshuam rau tus nqi tsim khoom, tus nqi khoom lag luam thiab cov txiaj ntsig ntawm cov lag luam hauv qhov kev lag luam no mus rau qhov sib txawv. Nyob rau hauv cov ntaub ntawv ntawm high refined paj rwb nqi thiab ntoo pulp nqi yog pheej yig, thiaj li yuav txo tau cov nqi, ntoo pulp yuav siv tau raws li ib tug refined paj rwb hloov thiab ntxiv, feem ntau yog siv rau zus tau tej cov zaub mov kho mob qib cellulose ether thiab lwm yam tsawg viscosity. cellulose ether. Hauv xyoo 2013, Tuam Tshoj cog 4.35 lab hectares ntawm paj rwb thiab tsim 6.31 lab tons ntawm paj rwb, raws li lub vev xaib ntawm National Bureau of Statistics. Raws li kev txheeb cais ntawm Tuam Tshoj Cellulose Industry Association, nyob rau hauv 2014, tag nrho cov zis ntawm refined paj rwb ntawm loj domestic refined paj rwb ntau lawm tuam txhab uas muag yog 332,000 tons, nrog ntau cov khoom ntawm raw khoom.
(2) cellulose ether downstream kev lag luam xwm txheej
Cellulose ether raws li "kev lag luam MONOsodium glutamate", cellulose ether ntxiv kev faib ua feem tsawg, ntau yam kev siv, kev lag luam hauv qab tau tawg mus rau txhua qhov chaw ntawm lub neej hauv kev lag luam hauv lub tebchaws.
Raws li cov xwm txheej ib txwm muaj, kev lag luam kev tsim kho qis thiab kev lag luam vaj tsev yuav muaj qee yam cuam tshuam rau qhov kev thov loj hlob ntawm cov khoom siv hauv tsev qib cellulose ether. Thaum kev lag luam hauv tsev thiab kev lag luam vaj tsev loj hlob sai, kev lag luam hauv tsev rau cov khoom siv hauv tsev qib cellulose ether thov kev loj hlob sai. Thaum qhov kev loj hlob ntawm kev lag luam hauv tsev thiab kev lag luam vaj tse qeeb qeeb, qhov kev loj hlob ntawm qhov kev thov rau cov khoom siv hauv tsev qib cellulose ether hauv kev lag luam hauv tsev yuav qeeb, ua rau kev sib tw hauv kev lag luam hnyav dua, thiab ua kom muaj sia nyob. ntawm cov txheej txheem fittest ntawm kev lag luam hauv kev lag luam.
Txij li xyoo 2012, nyob rau hauv ib puag ncig ntawm kev loj hlob qeeb ntawm kev lag luam 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 raws li hauv qab no: 1. Lub zuag qhia tag nrho ntawm kev lag luam kev tsim kho hauv tsev thiab kev lag luam vaj tsev yog qhov loj, thiab tag nrho kev lag luam xav tau loj; Cov neeg siv khoom lag luam tseem ceeb ntawm cov khoom siv hauv tsev qib cellulose ether los ntawm cov cheeb tsam tsim kev lag luam thiab cov nroog thib ib thiab qib thib ob, maj mam nthuav mus rau Midwest thiab thib peb cov nroog, kev thov kev loj hlob hauv cheeb tsam thiab qhov chaw nthuav dav; Qhov thib ob, tus nqi ntawm cellulose ether ntxiv rau cov nqi ntawm cov khoom siv hauv tsev yog qhov feem pua ntawm cov neeg siv khoom tsawg, cov neeg siv khoom sib txawv me me, cov neeg siv khoom tawg, yooj yim los tsim cov kev xav tau nruj, tag nrho cov kev xav tau ntawm kev lag luam downstream yog qhov ruaj khov; Peb, cov khoom siv hauv tsev hloov pauv tus nqi yog cuam tshuam rau cellulose ether xav tau qauv hloov, qhov tseem ceeb uas cellulose ether qib txij li xyoo 2012, cov khoom siv hauv tsev poob qis dua, cov khoom lag luam siab hauv cov nqi poob loj dua, nyiam cov neeg siv khoom xaiv ntau dua, nce qhov kev thov rau high-end khoom nyob rau hauv lub, thiab squeezing lub zoo tib yam hom khoom lag luam xav tau thiab nqi chaw.
Txoj kev loj hlob ntawm kev lag luam tshuaj thiab kev loj hlob ntawm kev lag luam kws tshuaj yuav cuam tshuam qhov kev thov hloov pauv ntawm qib tshuaj cellulose ether. Kev txhim kho ntawm tib neeg txoj kev ua neej nyob thiab kev tsim khoom noj khoom haus kev lag luam yog qhov tsim nyog rau kev ua lag luam xav tau cov zaub mov qib cellulose ether.
6. Txoj kev loj hlob ntawm cellulose ether
Vim muaj cov cellulose ether kev lag luam xav tau rau cov qauv sib txawv, tsim kom muaj lub zog ntawm cov tuam txhab sib txawv kom sib koom ua ke. Raws li kev pom ntawm cov qauv kev sib txawv ntawm cov yam ntxwv ntawm kev xav tau ntawm kev lag luam, cov tuam txhab lag luam hauv tsev cellulose ether ua ke nrog lawv tus kheej lub zog los ua kom muaj kev sib tw sib txawv, thiab tseem muaj kev nkag siab zoo ntawm txoj kev loj hlob thiab kev taw qhia ntawm kev ua lag luam.
(1) los xyuas kom meej qhov ruaj khov ntawm cov khoom zoo, tseem yuav yog cov ntsiab lus sib tw tseem ceeb ntawm cellulose ether tuam txhab
Cellulose ether nyob rau hauv kev lag luam feem ntau ntawm cov downstream lag luam nyob rau hauv cov nqi ntau lawm kuj me me, tab sis cov khoom zoo yog ntau dua. Cov pab pawg neeg nruab nrab thiab qib siab hauv kev siv lub npe ntawm cellulose ether qauv ua ntej, mus dhau ntawm cov qauv kev sim. Tom qab tsim cov qauv ruaj khov, nws feem ntau tsis yooj yim los hloov lwm lub npe ntawm cov khoom, tab sis kuj muab cov kev xav tau siab dua rau kev ruaj ntseg ntawm cellulose ether. Qhov tshwm sim no tseem ceeb dua nyob rau hauv domestic thiab txawv teb chaws cov ntaub ntawv loj tsim kev lag luam, tshuaj accessories, khoom noj khoom haus additives, PVC thiab lwm yam high-end teb. Txhawm rau txhim kho kev sib tw ntawm cov khoom lag luam, cov tuam txhab tsim khoom yuav tsum xyuas kom meej tias cov khoom sib txawv ntawm cov cellulose ether tuaj yeem tswj hwm kev ruaj ntseg zoo, txhawm rau tsim kom muaj kev lag luam zoo dua.
(2) Txhawm rau txhim kho cov txheej txheem ntawm kev siv cov khoom siv yog cov kev taw qhia kev txhim kho ntawm cov tuam txhab hauv tsev cellulose ether
Nyob rau hauv cov ntaub ntawv ntawm cellulose ether ntau lawm technology nce mature, ib theem siab ntawm daim ntawv thov technology yog conducive rau cov lag luam los txhim kho kev sib tw, tsim kom muaj kev ruaj ntseg cov neeg muas zaub kev sib raug zoo. Cov lag luam paub zoo ntawm cellulose ether hauv cov teb chaws tsim kho feem ntau yog siv lub tswv yim sib tw ntawm "ntseeg cov neeg siv khoom siab kawg + kev txhim kho ntawm kev siv qis thiab kev siv", txhim kho cellulose ether siv thiab siv cov mis, thiab teeb tsa cov khoom lag luam raws li kev faib khoom sib txawv. daim ntawv thov teb los pab txhawb kev siv cov neeg siv khoom, thiab cog qoob loo ntawm kev lag luam qis qis. Kev sib tw ntawm cellulose ether kev lag luam hauv cov teb chaws tsim tau nkag mus rau hauv kev siv tshuab los ntawm cov khoom.
Post lub sij hawm: Mar-04-2022