Sib tham txog ob peb yam tseem ceeb kev tsim khoom ntawm PCB number case

Txawm hais tias qhov zoo ntawm PCB tus lej zoo heev lossis tsis yog, hauv txoj ntsiab cai, tsis tuaj yeem sib cais los ntawm kev sib xyaw ua ke ntawm cov khoom tseem ceeb saum toj no. Qhov zoo tshaj plaws ntawm tus number case yog qhov ua piv txwv ntawm kev tshawb fawb, qib siab thiab ib puag ncig tiv thaiv ntawm cov mis. Nws yog reflected nyob rau hauv:

viscosity

Nws yog luv rau dynamic viscosity. Feem ntau nws tau qhia los ntawm viscosity, uas yog, qhov kev nyuab siab ntawm cov dej ntws faib los ntawm qhov nrawm nrawm hauv cov txheej txheej ntws, thiab chav thoob ntiaj teb yog PA / S (Pa. S) lossis millipa / S (MPa. S). Hauv PCB cov khoom lag luam, nws hais txog kev ua kua dej ntau dhau los ntawm lub zog sab nraud.

Kev sib hloov pauv ntawm cov viscosity units:

1Pa。 S=10P=1000mPa。 S=1000CP=10dpa.s

Yas

Nws hais txog tias tom qab tus number case tau deformed los ntawm sab nraud quab yuam, nws tseem tswj hwm nws cov khoom ua ntej deformation. Cov yas yas ntawm tus lej yog qhov ua tau zoo los txhim kho kev luam ntawv raug;

Thixotropic

Ink yog colloidal thaum nws sawv, thiab viscosity hloov thaum nws tau kov, tseem hu ua co thiab sagging tsis kam;

mobility

(leveling) qhov uas tus lej nthuav tawm ib puag ncig raws li kev ua ntawm sab nraud quab yuam. Cov dej ntws yog qhov sib txawv ntawm viscosity. Cov dej ntws muaj feem cuam tshuam nrog cov yas thiab thixotropy ntawm tus lej. Qhov ntau dua cov yas thiab thixotropy, ntau dua qhov ua kua; Yog tias kev txav mus los loj, cov ntawv luam tau yooj yim nthuav. Cov uas muaj cov kua dej me me yog nquag ua rau netting thiab inking, tseem hu ua anilox;

Viscoelasticity

Hais txog lub peev xwm ntawm tus number case kom thim rov qab sai tom qab raug txiav thiab tawg los ntawm lub scraper. Nws xav tau tias tus lej hloov pauv tus lej nrawm thiab tus lej rov qab tau nrawm dua txhawm rau ua kom yooj yim rau kev luam ntawv;

Tshuab Kom Qhuav

Nws yuav tsum tau ua kom qeeb tus number case qhuav ntawm qhov screen, zoo dua. Tom qab tus number case tau pauv mus rau lub substrate, sai dua qhov zoo dua;

meej

Qhov loj ntawm cov xim thiab cov khoom ua tau zoo, PCB tus lej feem ntau tsawg dua 10 μm. Qhov ua kom zoo yuav tsum tsawg dua li ib feem peb ntawm qhov qhib mesh;

spinnability

Thaum tuaj nqa tus lej nrog tus zauv tus lej, qhov uas cov kua nplaum tsis tawg yog hu ua daim duab xaim. Tus number case yog ntev, thiab muaj ntau cov ntaub ntawv ntawm tus number case thiab luam ntawv nto, uas ua rau lub hauv paus thiab cov ntawv luam tawm qias neeg thiab txawm tias tsis tuaj yeem luam tawm;

Pob tshab thiab zais lub hwj chim ntawm tus lej

Rau PCB tus lej, raws li kev siv sib txawv thiab xav tau, ntau yam kev xav tau kuj tau muab tso rau pem hauv ntej kom pom tseeb thiab zais lub zog ntawm tus lej. Feem ntau hais lus, tus lej xov tooj hluav taws xob, tus cwj mem coj ua thiab tus cim tus cim xav tau lub zog zais siab. Cov tshuaj tiv thaiv kab mob yog hloov tau yooj yim dua.

Tshuaj tsis kam ntawm tus cwj mem

PCB number case muaj cov qauv nruj rau cov kua qaub, alkali, ntsev thiab hnyav raws li lub hom phiaj sib txawv;

Lub cev tsis kam ntawm tus lej

PCB number case yuav tsum ua kom tau raws li qhov xav tau ntawm sab nraud quab yuam ua haujlwm tsis kam, tiv taus cua sov, ua haujlwm tsis ua haujlwm tev thiab ntau yam kev ua haujlwm hluav taws xob nruj;

Kev nyab xeeb thiab ib puag ncig tiv thaiv tus cwj mem

PCB number case yuav tsum tsis muaj tshuaj lom, tsis muaj ntxhiab, nyab xeeb thiab ib puag ncig zoo.

Saum toj no, peb tau sau cov ntsiab lus tseem ceeb ntawm kaum ob PCB inks, thiab qhov teeb meem viscosity yog cuam tshuam nrog tus neeg teb xov tooj hauv kev ua haujlwm tiag tiag ntawm kev tshuaj ntsuam luam ntawv. Theem ntawm viscosity muaj kev sib raug zoo nrog kev ua kom zoo ntawm cov luam ntawv lo lo ntxhuav. Yog li ntawd, hauv PCB cov ntaub ntawv thev naus laus zis cov ntaub ntawv thiab QC cov ntawv tshaj tawm, viscosity tau qhia meej meej, qhia nyob rau hauv cov xwm txheej twg thiab hom ntsuas viscosity ntsuas ntsuas siv. Hauv cov txheej txheem luam ntawv tiag tiag, yog tias tus lej viscosity siab, nws yuav ua rau luam ntawv xau thiab sawtooth hnyav ntawm ntug ntawm daim duab. Txhawm rau txhawm rau txhim kho cov nyhuv luam ntawv, yuav ntxiv qhov ua kom viscosity ua tau raws li qhov xav tau. Tab sis nws tsis nyuaj pom tias nyob rau ntau qhov xwm txheej, kom tau txais qhov kev daws teeb meem zoo tshaj plaws (daws teeb meem), tsis muaj teeb meem dab tsi viscosity koj siv, nws tsis tuaj yeem ua tiav. Vim li cas? Tom qab kawm tob tob, nws tau pom tias cov kua viscosity yog qhov tseem ceeb, tab sis tsis yog ib qho xwb. Lwm qhov tseem ceeb yog thixotropy. Nws kuj cuam tshuam rau kev luam ntawv raug.