Common Coating Methods And The Flow State Of The Coating Solution

Cov txheej txheem txheej txheem dav dav thiab lub xeev ntws ntawm cov tshuaj txheej txheej

Roll-rau- yob ntub txheej yog cov txheej txheem tsim khoom tseem ceeb rau lithium roj teeb electrodes, optical films, tiv thaiv zaj duab xis, nplaum tapes thiab kev kho mob substrates. Kev ua tau zoo ntawm cov khoom tiav yog hauv paus txiav txim siab los ntawm ob yam tseem ceeb: txheej txheej xaiv thiab cov dej ntws hauv lub xeev ntawm txheej slurry. Ntau tus neeg tsim khoom tawm tsam nrog cov yeeb yaj kiab tsis sib xws, huab cua nkag, streaks thiab cov khoom tsis ruaj khov vim tsis sib haum ntawm lub taub hau thiab cov kua dej tsis sib haum. Cov kws tshaj lij kev lag luam tau txheeb xyuas cov qauv kev faib tawm ntawm cov txheej txheem txheej txheej txheej txheem thiab cov dej ntws cov cai los muab cov ntaub ntawv qhia meej meej rau kev xaiv cov khoom siv thiab kev ua kom zoo.

Txheej taub hau paub txog cov kua hloov mus los ntawm peb lub hauv paus mechanisms: hloov cov menyuam, nozzle jetting thiab cov ntaub thaiv dej dawb. Feem ntau cov txheej txheem txheej txheej txheej txheem ua ke ob lossis peb txheej txheej ib txhij. Los ntawm qhov kev xav ntawm kev tswj qhov hnyav, tag nrho cov txheej txheem ntub dej poob rau hauv ob pawg tseem ceeb: ua ntej- ntsuas txheej thiab tom qab- ntsuas txheej, ntxiv rau tus kheej tshwj xeeb- ntsuas thiab cov txheej txheem sib xyaw.

Ua ntej- metered txheej xa cov kua ua kom muaj nuj nqis rau hauv cov substrates yam tsis tau khawb cov slurry tshaj tom qab. Nws lub ntsiab kom zoo dua yog qhov kawg zaj duab xis thickness yog tsuas yog tswj los ntawm cov kua ntim ntws, ywj siab ntawm substrate khiav ceev. Cov txheej txheem ua ntej -metered technologies suav nrog hnia yob txheej, qhov- tuag extrusion, zawv zawg txheej, kab hlau rhuav, txheej gravure thiab rov qab yob txheej. Cov txheej txheej contour no tsim cov hlaws txheej ruaj khov thiab txhawb nqa ultra- nyias, siab- precision ntau lawm rau cov khoom siv hluav taws xob thiab hluav taws xob tshiab.

Ncej - metered txheej siv cov kua txheej ntau dhau ua ntej, tom qab ntawd txhuam cov khoom seem kom ncav cuag lub hom phiaj tuab. Cov txheej txheem sawv cev muaj comma hniav txheej, cua riam txheej, hlau bar txheej, dip txheej thiab nyem txheej. Feem ntau cov ntawv tshaj tawm - cov cuab yeej ntsuas ntsuas yog nyob rau qib coaters nrog cov qauv yooj yim thiab tus nqi qis, tsim nyog rau nruab nrab thiab qis - cov khoom loj xws li ntim cov yeeb yaj kiab tiv thaiv thiab cov ntawv nplaum dav dav. Txawm li cas los xij, qhov nro ntawm cov txheej txheej ua kua yooj yim ua rau microscopic thickness fluctuation ntawm cov yeeb yaj kiab tiav.

Kev coj tus cwj pwm ntawm cov dej ntws ncaj qha txhais cov qhov rai ua haujlwm ruaj khov ntawm txhua hom txheej txheej. Rau ib leeg - cov menyuam thiab cov phaj tiaj tiaj, tus lej capillary (Ca) thiab Reynolds tus lej (Re) sib koom ua ke tswj hwm cov yeeb yaj kiab ntub dej, kev ruaj ntseg thiab kev pheej hmoo ntawm huab cua nkag. Rau cov txheej txheem hloov pauv tswj los ntawm tus nqi ntws ruaj khov q, plaub lub ntsiab lus ua ntej -metered hom qhia pom tseeb qhov sib txawv ntawm cov dej txwv.

Hnia yob txheej cia siab rau substrate nro thiab qhwv lub kaum sab xis kom ruaj khov ua kua zaj duab xis, nrog tsawg kawg nkaus huab cua nkag mus rau hauv cov khoom txaus txaus. Swb txheej tuaj yeem ncua cua nkag los ntawm kev siv lub tshuab nqus tsev rau lub meniscus; flow rate exerts lub zog tshaj ntawm zaj duab xis thickness thaum txheej txheej muaj kev cuam tshuam tsis muaj zog. Qhov- txheej txheej tuag boasts lub siab tshaj plaws kev khiav hauj lwm ceev tshaj li zawv zawg txheej, nrog qhov tsawg kawg nkaus ruaj khov zaj duab xis thickness ncav cuag 60% -70% ntawm tuag di ncauj qhov sib txawv nyob rau hauv ib tug tseem ceeb capillary tooj. Tuag extrusion txheej nta dav kev sib cuag cheeb tsam ntawm cov kua thiab lub vev xaib; optimized tuag geometry thiab lub tshuab nqus tsev sab saud tuaj yeem nqa qhov txwv siab ntawm kev tsim khoom ceev.

Cov neeg tsim khoom yuav tsum sib phim hom txheej txheej raws li lub hom phiaj precision, slurry rheology thiab ntau lawm ceev. High-kawg ua haujlwm ua yeeb yaj kiab ua ntej tseem ceeb ua ntej- ntsuas qhov- tuag lossis kab hlau rhuav, thaum sib txawv me me-batch processing xaiv qis- tus nqi xa ntawv-metered hniav txheej. Tsim nyog tswj tus nqi ntws, nqus tsev kawm ntawv, qhov kub thiab txias substrate nro tshem tawm cov dej tsis ruaj tsis khov thiab ua kom cov khoom tiav zoo sib xws.

Reference: Industry technical article "Common Coating Modes and Coating Fluid Flow Characteristics" published on WeChat official account coating technology column, August 2025. This article reorganizes and interprets core coating fluid mechanics knowledge for global industry popular science sharing.

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