Dab tsi yog daim ntawv thov ntawm precipitated silica?
Precipitated silica yog cov khoom siv dav siv rau kev txhawb nqa cov roj hmab. Feem ntau hais lus, qhov cuab lub zog muaj zog ntawm precipitated silica (tshwj tsis yog rau superfine thiab saum npoo kev kho mob) tsis zoo li qhov ntawm cov pa roj carbon dub, yog li nws yog cov khoom siv semi reinforcing filler. Yog li, qhov feem pua ntawm cov pa roj carbon dub los hloov yuav tsum txiav txim siab raws li daim ntawv thov.
Cov tshuaj pleev xim silicayog siv rau hauv cov khoom siv roj hmab xws li sab hauv thiab sab nraud lub tsheb ntawm lub tsheb, cov roj tsheb, cov tsheb thauj khoom, tsheb laij teb, cov forklifts, tsheb kauj vab, thiab lwm yam. cov khoom lag luam ntau dua los sis tsawg dua. Ntxiv qee qhov nqi ntawm silica rau cov log tsheb zoo tib yam tuaj yeem txhim kho kev pab lub neej ntawm lub log. Raws li cov kev tshawb fawb thiab cov txiaj ntsig ntawm kev sib tw ntawm lub log tsheb ntawm lub tuam txhab West German yav dhau los, yog tias 10-20 qhov ntawm silica tuaj yeem ntxiv, kev kho kom haum thiab kua muag tuaj yeem txhim kho, txoj kev tsav tsheb ntawm lub log tuaj yeem nce ntxiv, thiab tuav ntawm lub log ntawm txoj kev tsheb tuaj yeem ua kom zoo dua qub, uas muaj txiaj ntsig zoo rau kev tsav tsheb nyab xeeb. Ib qho ntawm cov laj thawj yog tias kev tsav tsheb ntawm lub log tsheb ntawm lub log tsheb hauv Suav teb qis dua theem thoob ntiaj teb. Tsis tas li ntawd, vim muaj qhov siab calorific tus nqi ntawm cov pa roj carbon dub, lub tsheb txawv teb chaws lub log tsheb siv rau txoj kev loj tau ntxiv cov pa roj carbon dub. Tam sim no, cov kev lag luam hauv tsev thiab txawv teb chaws tau nce ntau qhov yuav tsum tau muaj ntawm cov log tsheb kauj vab, xws li cov log tsheb cov xim muaj hlau thiab lub nplhaib nyem thiab lwm cov ntawv tshiab, uas yog tsim nrog cov pa roj carbon dawb dub dua li cov pa roj carbon dub. Hauv kev tsim cov roj hmab khau, cov neeg xav tau tsis tsuas yog cov nrawm nrawm, tab sis kuj tseem muaj xim zoo nkauj, xis nyob thiab lub teeb rau cov khau roj hmab, dej nag, khau kis las, khau ncig ua si, khau qoj, khau dhia ua si, thiab lwm yam. qhov cuab lub zog zoo, hnav tsis kam, nplua tsis kam thiab vamp adhesion, tab sis kuj yog lub teeb xim zoo ntxiv rau cov khoom siv, yog li nws ua lub luag haujlwm tseem ceeb hauv kev txhim kho khau roj hmab kom muab qhov zoo thiab hom ntawm nkawm khau.
Dawb carbon dubtuaj yeem siv los ua cov khoom ntim hauv polyethylene, polypropylene, polybutene, epoxy resin thiab lwm cov yas, tuaj yeem txhim kho lub zog elastic thiab hnav tsis kam ntawm plastics, ntxiv rau thermal stability ntawm hardness. Nws kuj tseem tuaj yeem txhim kho hluav taws xob hluav taws xob ntawm lub cable. Piv txwv li, high-voltage kab ntawm methyl vinyl silicone roj hmab xav tau fumed silica los yog zoo-precipitated silica. Nws tsis yooj yim cais ob txheej txheej ntawm cov zaj duab xis yas, thiab nws tsis yooj yim kom qhib lub hnab lub qhov ncauj thaum lub hnab ntim khoom, yog li cov pa roj carbon dawb yog qhov qhib tus neeg saib xyuas. Thaum PVC PVC siv los ua cov khoom siv hauv tsev, yog tias qee qhov silica ntxiv, qhov nyuaj, elasticity, thermal denaturation thiab lwm yam khoom ntawm cov khoom tuaj yeem hloov kho.
Dawb carbon xim dub raws li sizing tus neeg sawv cev ntawm daim ntawv tuaj yeem txhim kho qhov dawb thiab opacity ntawm daim ntawv, txhim kho printability, roj tsis kam, hnav tsis kam, tes rhiab thiab luster. Rau kev kos duab, nws tuaj yeem ua rau daim ntawv saum npoo zoo zoo, tus number case ruaj khov thiab tsis muaj qhov tawg ntawm nraub qaum; ntxiv 1-2% silica rau qee daim ntawv tuaj yeem txo qhov hnyav ntawm 10%, tsis tsuas yog daim ntawv nyias, tab sis kuj txhim kho lub zog, tiv thaiv tus cwj mem nkag, ua cov ntawv luam ntawv pom meej, thiab nce lub opacity.
Cov carbon dawb dub muaj cov cuab yeej thixotropic. Ntxiv ib qho me me ntawm cov pa roj carbon dawb dub rau txheej tau tuaj yeem tshem tawm qhov kev poob qis ntawm qhov tshwm sim ntawm cov txheej. Hauv cov txheej txheej polyester tsis haum, ntev li 0.5-2% kev tso siab ntawm silica ntxiv, txheej yuav thov tau rau ntawm qhov chaw ntsug ntawm lub sijhawm ntawm 500g / m2 tsis muaj kua poob thiab wrinkle. Ntxiv silica rau cov xim tuaj yeem tsis tsuas yog tiv thaiv cov xim nag lossis daus, tab sis kuj txhim kho cov adsorption thiab tawg ntawm cov xim thiab zas. Thaum siv los ua tus muab kauv ntawm emulsion txheej, nws tuaj yeem txhim kho thermal stability. Txhawm rau kom tau raws li cov kev xav tau ntawm kev lo thiab tus number case matting rau silica, cov neeg ua hauj lwm matting tshwj xeeb tau tsim thiab tsim tawm txawv teb chaws. Thaum cov roj pleev nitrocellulose thiab cov tshuaj pleev zoo ib yam muaj cov roj av sai sai silica matting tus neeg sawv cev, cov khoom uas tsis muaj qhov muag ntawm cov xim muaj peev xwm txhim kho tau, thiab cov xim muaj peev xwm ua kom yooj yim tawg, uas tsuas muaj me me ntawm cov nyhuv thooj, zoo raug tshem tawm, cov cuab yeej zoo nkauj, siab pom thiab zoo coj kuj. Ntxiv 0,5% cov pa roj carbon dawb rau hauv luam ntawv number case muaj cov nyhuv luam ntawv zoo, uas tuaj yeem tshem tawm qhov cuam tshuam ntawm qhov tsis paub meej txog tus cwj mem number case, txhim kho qhov tsis huv ntawm cov ntawv luam tawm thiab nce qhov ci ntsa iab ntawm cov xim.
Ib qho ntxiv,silicakuj tseem siv thiab ua ntau yam haujlwm muaj txiaj ntsig hauv tshuaj tua kab, tshuaj, nplaum, txhuam hniav thiab tshuaj pleev ib ce txhua hnub
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