Hom Methyl Cellulose Ether
A. Hydroxypropyl methylcellulose (HPMC) feem ntau yog ua los ntawm cov paj rwb ntshiab heev refined li raw khoom, uas yog tshwj xeeb etherified nyob rau hauv alkaline tej yam kev mob.
B. Hydroxyethyl methyl cellulose (HEMC), uas tsis yog-ionic cellulose ether, yog cov hmoov dawb, tsis muaj ntxhiab thiab tsis qab.
C. Hydroxyethylcellulose (HEC) yog ib qho uas tsis yog-ionic surfactant, dawb nyob rau hauv tsos, tsis muaj ntxhiab thiab saj tsis qab thiab yooj yim-flowing hmoov.
Cov saum toj no yog non-ionic cellulose ethers, thiab ionic cellulose ethers (xws li carboxymethyl cellulose (CMC)).
Thaum siv cov hmoov qhuav mortar, vim tias ionic cellulose (CMC) tsis ruaj khov nyob rau hauv lub xub ntiag ntawm calcium ions, nws tsis tshua muaj siv nyob rau hauv inorganic gelling systems nrog xis mas thiab slaked txiv qaub li cementing cov ntaub ntawv. Hauv qee qhov chaw hauv Suav teb, Qee cov phab ntsa sab hauv tau ua tiav nrog cov hmoov txhuv nplej siab hloov ua cov khoom siv cementing thiab Shuangfei hmoov raws li cov muab tub lim siv CMC ua cov thickener, tab sis vim tias cov khoom no yog cov kab mob mildew thiab tsis muaj dej-resistant, nws maj mam tshem tawm. los ntawm kev ua lag luam.
Tam sim no, feem ntau siv cellulose ethers nyob rau hauv domestic qhuav-mixed mortar khoom kuj hu ua hydroxypropyl methylcellulose ether (HPMC) thiab hydroxyethyl methylcellulose ether (HEMC). Rau cov khoom siv sib txawv, qhov ntau npaum ntawm cellulose ether kuj txawv, tsawg li 0.02% xws li phab ntsa mortar rau 0.1%. Xws li plastering mortar, qhov siab tuaj yeem yog los ntawm 0.3% mus rau 0.7% xws li pobzeb nplaum.
Cov khoom ntawm Cellulose Ether
❶ Cellulose ether muaj cov dej tuav tau zoo hauv cov tshuaj khib nyiab. Nws cov dej tuav ua haujlwm tuaj yeem tiv thaiv lub substrate los ntawm nqus dej ntau dhau sai thiab cuam tshuam cov evaporation ntawm cov dej, thiaj li ua kom cov dej txaus thaum cov cement yog hydrated. Nws tuaj yeem tiv thaiv cov mortar kom qhuav thiab tawg vim kev poob dej sai, kom cov mortar muaj sijhawm ntev dua.
Feem ntau hais lus, cov dej tuav ntawm cov cement slurry nce nrog qhov nce ntawm cov ntsiab lus ntawm cellulose ether. Qhov ntau dua qhov viscosity ntawm ntxiv cellulose ether, qhov dej tuav tau zoo dua.
❷ Cov nyhuv thickening ntawm cellulose ether tuaj yeem tswj cov mortar kom ua tiav qhov zoo sib xws, txhim kho kev sib koom ua ke ntawm cov mortar, ua tiav cov nyhuv anti-sag, txhim kho kev ua haujlwm, thiab txhim kho kev tsim kho.
❸ Cellulose ether tuaj yeem txhim kho cov viscosity ntub dej ntawm cov khib nyiab ntub dej, kom ntseeg tau tias cov tshuaj khib nyiab ntub dej muaj kev sib raug zoo ntawm ntau yam substrates.
❹ Cellulose ether txhim kho qhov kev sib raug zoo ntawm cov tshuaj khib nyiab, thiab tuaj yeem ua kom lub sijhawm dej txaus los ua kom cov cement tag nrho txawm nyob hauv qhov kub thiab txias, yog li ua kom muaj kev sib raug zoo ntawm cov mortar.
Daim ntawv thov teb ntawm cellulose ether
Cement-based:
⑴, putty, ⑵, plastering mortar, ⑶, waterproof mortar, ⑷, caulking agent, ⑸, plastering mortar, ⑹, spray mortar, ⑺, decorative mortar, ⑻, pobzeb nplaum, ⑼, cement self-leveling, ⑽ ⑾, masonry mortar, ⑿, kho mortar, ⒀, thermal rwb thaiv tsev slurry, ⒁, EIFS thermal insulation bonding mortar, ⒂, non-shrinkage grouting material.
Lwm yam khoom siv hauv tsev:
⑴, dej mortar, ⑵, ob-tivthaiv mortar.
Nrog rau txoj kev loj hlob ntawm qhuav-siv mortar, cellulose ether tau dhau los ua ib qho tseem ceeb cement mortar admixture. Txawm li cas los xij, muaj ntau ntau yam thiab specifications ntawm cellulose ether, thiab qhov zoo ntawm batches tseem fluctuates. Thaum siv nws, koj yuav tsum xyuam xim rau:
1. Cov yam ntxwv ua haujlwm ntawm kev hloov mortar yog ze ze rau kev txhim kho viscosity ntawm cellulose ether. Txawm hais tias cov khoom uas muaj qhov siab nominal viscosity muaj qhov siab kawg nkaus viscosity, vim tias qeeb qeeb, nws yuav siv sij hawm ntev kom tau qhov kawg viscosity; Tsis tas li ntawd, cov cellulose ether nrog coarser hais yuav siv sij hawm ntev kom tau qhov kawg viscosity, yog li cov khoom uas muaj viscosity siab dua tsis tas yuav muaj cov yam ntxwv ua haujlwm zoo dua.
2. Vim qhov kev txwv ntawm cov degree ntawm polymerization ntawm cellulose ether raw cov ntaub ntawv, lub siab tshaj plaws viscosity ntawm cellulose ether kuj txwv.
Post lub sij hawm: Feb-02-2023