Dab tsi yog Epoxy Conformal Txheej rau PCB?

Conformal coatings yog cov yeeb yaj kiab polymer siv rau cov ntawv luam tawm ntawm lub rooj tsav xwm los tiv thaiv lawv tiv thaiv cov teeb meem xws li ya raws, huab cua kub, thiab tshuaj lom neeg. Cov yeeb yaj kiab no nyias nyias kom lawv tuaj yeem ua raws li cov duab sib txawv thiab lawv cov khoom. Cov txheej tiv thaiv lawv muab yog qhov tseem ceeb hauv kev ua kom cov khoom siv hluav taws xob nyob ruaj khov, ua haujlwm zoo, thiab ruaj khov.

Epoxy conformal txheej yog ob feem sib xyaw uas muaj lub zog tshwj xeeb thiab ua haujlwm thaum siv. Ob qhov sib xyaw ua ke kho tau yooj yim thiab tiv taus kev co, av noo, tshuaj incursion, thiab puas. Hom txheej no kuj tuaj yeem pom tau ua ib feem sib xyaw tab sis yuav tsum tau kho los ntawm UV raug lossis thermally. Ob leeg muaj tshuaj lom neeg zoo heev thiab kub tsis kam thiab muaj zog thiab tawv.

Qhov zoo 

Lub tshav kub tiv thaiv kev ntseeg siab ntawm epoxy txheej ua rau lawv nrov hauv kev lag luam, tsheb, thiab kev siv dav hlau. Lawv kuj tseem siv los ua adhesion primer txhim kho rau ntawm cov hlau, tshwj xeeb tshaj yog cov uas nquag corrosion. Qee cov kaus poom hlau thiab cov thawv ntim kuj muaj cov txheej txheem no nyob rau hauv lawv sab hauv raws li kev tiv thaiv xeb, tshwj xeeb tshaj yog cov khoom siv acidic xws li txiv lws suav. Yog li, ntxiv rau qhov muaj txiaj ntsig zoo hauv PCBs, cov txheej txheem sib xyaw ua ke muaj txiaj ntsig zoo hauv lwm qhov chaw. Nws yog ib qho kev xaiv zoo vim muaj qhov zoo hauv qab no;

• Epoxy txheej yog ib qho yooj yim mus thov
• Nws muaj qhov hloov pauv iav siab nrog 50-90 ° C qhov kub thiab txias
• Lub txheej muaj impressive dielectric constancy thiab rwb thaiv tsev tsis kam
• Nws cov dej noo barrier nqus thiab tuav cov cwj pwm yog qhov tshwj xeeb
• Nws muaj kev tiv thaiv luv luv thiab tseem siv tau txawm tias nyob ntawm 150 ° C
• Cov txheej yog tus nqi qis tshwj xeeb tshaj yog piv rau urethane thiab silicone
• Nws tuaj yeem ntxuav tsis tau cov kuab tshuaj ua tsaug rau nws cov dej emulsion formulation

Cov tsis zoo 

Lub hardness thiab durability ntawm epoxy txheej yog unquestionable thiab muab hydrophilic polar tiv thaiv. Txawm li cas los xij, txheej txheej muaj ob peb qhov tsis zoo uas koj yuav tsum paub txog thaum yuav thiab thov. Qhov tsis zoo ntawm qhov no conformal txheej suav nrog cov dej tsiv teb tsaws chaw nyob hauv qab txheej txheej. Kev tsiv teb tsaws ua rau muaj qhov permeation ntau dhau, thiab qhov no tuaj yeem ua rau muaj teeb meem xws li:

• Tshem tawm cov kev tiv thaiv npog ntawm lub rooj sib txoos
• Pealing ntawm kev tiv thaiv conformal zaj duab xis
• Infiltration los ntawm cov teeb meem sab nraud
• Kev ua tau zoo thiab corrosion degradation

Yog li ntawd, nws tsis pom zoo kom xaiv epoxy txheej rau cov khoom siv thiab cov khoom siv uas ua haujlwm hauv cov dej uas cuam tshuam nrog dej. Nws kuj tseem siv tau rau cov xwm txheej tsis zoo thiab cov tshuaj tsuag ntsev. Lwm qhov tsis zoo yog:

• Epoxy txheej yog qhov nyuaj rau kev kho lossis rov ua haujlwm dua vim nws qhov tawv tawv thiab durability
• Nws tuaj yeem txo qis hauv cov txheej txheem polymerization
• Qhov kub thiab txias heev txo qhov kev ntxhov siab
• Qhov tsis muaj UV kab nyob rau hauv qee qhov epoxies deteriorates lub coatings yog hais tias lawv overexposed rau UV teeb.
• Nws tsis txhim khu kev qha hauv kev tiv thaiv tin whisker kev txhim kho thiab cov teebmeem

Ntsiab lus 

ER coatings yog qhov ruaj khov thiab tiv taus tshuaj lom neeg, av noo, kev co, thiab puas tsuaj. Tab sis nws tseem tsis tuaj yeem tsis quav ntsej tias lawv qhov kev tiv thaiv tuaj yeem txo qis dua qhov kub siab heev. Cov yam ntxwv ua yeeb yaj kiab ntev ntev kuj ua haujlwm tawm tsam nws, ua kev kho mob nyuaj kom ua tiav. Thaum ua haujlwm nrog cov txheej txheem txheej txheem no, koj yuav tsum ua tib zoo ua txhua yam txheej txheem kom tsis txhob muaj qhov tsis xws luag, thiab tsis tas yuav kho thiab rov ua haujlwm dua. Nws yog txheej txheej uas koj tuaj yeem vam khom nrog daim ntawv thov raug thiab siv rau hauv cov xwm txheej zoo.

Rau ntxiv txog Dab tsi yog epoxy conformal coatings rau pcb, koj tuaj yeem them mus ntsib DeepMaterial ntawm https://www.epoxyadhesiveglue.com/what-is-epoxy-conformal-coating-and-why-do-i-need-it/ yog xav paub ntau info.