Cellulose etheryog ib qho polymer uas tsis yog ionic semi-synthetic siab molecular, 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:
① Tus neeg sawv cev khaws dej, ②Thickener, ③Cov khoom sib npaug, ④Cov khoom tsim zaj duab xis,
⑤Cov Ntawv Qhwv
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. Tom ntej no, kuv yuav tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.
Ixim latex
Hauv kev lag luam pleev xim latex, xaiv hydroxyethyl cellulose, qhov kev qhia dav dav ntawm qhov sib npaug viscosity yog 30000-50000cps, 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 ua kom tuab, tiv thaiv kev sib xyaw ntawm cov xim, pab kom cov xim sib cais, ruaj khov ntawm cov xim latex, thiab ua kom cov viscosity ntawm cov khoom sib xyaw, uas yog qhov pab tau rau kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yooj yim dua rau siv. Nws tuaj yeem yaj rau hauv dej txias lossis dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi pH. Nws tuaj yeem siv tau zoo ntawm PI tus nqi 2 thiab 12. Cov txheej txheem siv yog raws li nram no:
1. Ntxiv ncaj qha rau hauv kev tsim khoom
Txoj kev no, yuav tsum xaiv hom hydroxyethyl cellulose qeeb, thiab siv hydroxyethyl cellulose nrog lub sijhawm yaj ntau dua 30 feeb. Cov kauj ruam yog raws li nram no: ① Muab ib qho dej ntshiab rau hauv lub thawv uas muaj lub tshuab ua kom siab ② Pib do tas li ntawm qhov ceev qis, thiab tib lub sijhawm maj mam ntxiv pawg hydroxyethyl rau hauv cov tshuaj kom sib npaug ③Txuas ntxiv do kom txog thaum tag nrho cov khoom siv granular raug tsau ④Ntxiv lwm yam khoom ntxiv thiab cov khoom ntxiv yooj yim, thiab lwm yam. ⑤Do kom txog thaum tag nrho cov pawg hydroxyethyl yaj tag, tom qab ntawd ntxiv lwm yam khoom hauv cov mis thiab zom kom txog thaum cov khoom tiav.
2. Nruab nrog niam cawv rau tom qab siv
Txoj kev no tuaj yeem xaiv hom tam sim ntawd, thiab muaj cov cellulose 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.
3. Ua kom nws ua porridge rau tom qab siv
Vim tias cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (tsis yaj) rau hydroxyethyl, cov kuab tshuaj no tuaj yeem siv los ua cov porridge. Cov kuab tshuaj organic feem ntau siv yog cov kua organic hauv cov xim latex, xws li ethylene glycol, propylene glycol, thiab cov neeg sawv cev tsim 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.
In putty
Tam sim no, feem ntau ntawm cov nroog hauv kuv lub tebchaws, cov putty uas tsis muaj dej thiab tsis yooj yim txhuam tau txais txiaj ntsig zoo los ntawm tib neeg. 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 tib 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 thiab hydroxypropyl methyl. Qhov viscosity specification feem ntau yog ntawm 40000-75000cps. Lub luag haujlwm tseem ceeb ntawm cellulose yog kev khaws dej, kev sib txuas thiab kev ua kom lubrication.
Vim tias 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 infiltration ntau ntawm cellulose xaiv los ntawm ob lub qauv kuj txawv. Tus nqi ntxiv yog li 2‰-3‰.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2024