Luam ntawv ntawm zaj duab xis-raws li cov khoom siv nplaum tus kheej tuaj yeem nthuav tawm cov nyom, thiab tus cwj mem los ntshav yog qhov teeb meem feem ntau tau ntsib los ntawm cov neeg tsim khoom luam tawm. Ink poob yog hais txog qhov tsis zoo adhesion ntawm cov ntawv luam tawm ntawm cov number case txheej ntawm qhov chaw ntawm cov khoom siv vim muaj ntau yam xws li qis nro nro, UV kho tsis txaus, thiab number case additives ntau dhau. Heev number case poob tsis tsuas yog cuam tshuam rau cov khoom zoo, tab sis txawm tuaj yeem ua rau scrapping ntawm batches ntawm cov khoom. Hauv tsab xov xwm no, peb yuav tshawb txog peb qhov ua rau tus number case los ntshav ntawm cov ntawv luam tawm zaj duab xis tus kheej nplaum cov ntaub ntawv thiab muab cov kev daws teeb meem zoo los kov yeej qhov teeb meem no.
1. Tsawg nto nro ntawm cov khoom siv zaj duab xis
I. b, the higher the surface tension, q. h, o. This low surface tension can lead to poor ink adhesion, n. t, a. b, w 38 m. To resolve this issue, c:
A. o: implement the surface treatment process to enhance the surface tension of the film material. This can be achieved by corona treatment, flame treatment or plasma treatment, which can change the surface characteristics, increase wettability and promote ink adhesion.
B. Primer coat: Apply a suitable primer coat to the film material prior to printing. Primers help create a bond between the ink and the surface of the material, improving ink adhesion and reducing the chance of ink dripping. Consult your coating supplier to select a suitable primer that is compatible with the film material and ink formulation. Some professional label printing companies will also directly use coated PET self-adhesive materials for printing. The coating changes the surface wetting characteristics of PET self-adhesive materials, thiab qhov kev ua tau zoo yog ruaj khov, thiab qhov ruaj khov ntawm tus number case txheej tuaj yeem txhim kho tau zoo.
2. UV kho tsis txaus
UV kho tsis txaus kuj tseem yuav ua rau muaj kua mem tshuaj thaum luam ntawv zaj duab xis-hom cov khoom siv nplaum tus kheej. Kev kho tsis tiav yuav ua rau muaj tus number case txheej uas tsis ua tiav qhov nyuaj thiab adhesion, ua rau cov smearing tsis zoo thiab nrawm. Kev kho tsis tiav txhais tau tias txheej saum npoo ntawm tus cwj mem luam ntawv tau qhuav thiab kho, tab sis sab hauv tsis tau kho tag nrho. Tus cwj mem poob los ntawm qhov xwm txheej zoo li no feem ntau tshwm sim hauv kev luam ntawv ntawm cov qauv thaj chaw loj. Qhov no yog vim tias cov qauv loj ntawm thaj chaw siv tus cwj mem ntau, thiab sab hauv ntawm tus number case txheej tsis yooj yim kho kom zoo tag nrho. To resolve this issue, Koj tuaj yeem xa mus rau cov kev daws teeb meem hauv qab no:
A. UV Lub Zog thiab Koob Tshuaj: Make sure the UV curing system is properly calibrated and delivering adequate UV intensity and dosage. Monitor and adjust UV intensity levels to achieve optimal curing for the specific ink and film material being used. Piv txwv li, darker patterns absorb more UV light and often require more power to dry completely. Consult ink and equipment manufacturers for recommended UV curing parameters.
B. Curing time and temperature: optimize the curing time and temperature settings to ensure sufficient exposure and ensure that the ink layer is fully cured. Consult the ink manufacturer’s guidelines for recommended curing parameters and adjust accordingly for the printing conditions and equipment used.
C. Service life of UV lamps: Tam sim no, the service life of UV lamps on toppan printing equipment is between 800 thiab 1000 Teev. If the lamps have not been replaced when the rated life is exceeded, it is easy to cause the ink to dry out. Yog li ntawd, when replacing the UV lamp tube, it is necessary to make detailed records, and when the UV lamp tube reaches the service life, it must be replaced in time.
3. Excessive ink additives
The presence of excessive ink additives will cause ink drops when printing film-type self-adhesive materials. In the printing process, the printing ink often encounters the problems of thickening, high viscosity and poor inking. Yog li ntawd, many operators will choose to add varnish to improve the fluidity of printing ink. Txawm li cas los, if the amount of varnish is used improperly, it is very easy to affect the ink viscosity, surface tension and adhesion performance, resulting in ink drop. Please consider the following solutions to resolve this issue:
A. Ink Formulations: Review and optimize ink formulations with the aim of reducing additive overuse. Since not all materials can be perfectly matched with inks, finding the right ink is best achieved by working closely with the ink supplier to develop a custom ink formulation that balances ink properties and minimizes the risk of ink drops.
B. Compatibility testing: Send the material to the ink supplier for testing to ensure that the ink additive used is compatible with the film material and printing process. Compatibility testing is performed between ink and film materials to determine any interactions or incompatibilities that may cause ink drops. Kuaj cov qauv sib txawv ntawm tus cwj mem thiab kho cov qib ntxiv kom pom qhov kev sib xyaw ua ke zoo tshaj plaws uas muab kev sib xyaw zoo thaum txo tus cwj mem nplaum.
Xaus
Kov yeej cov kev sib tw ntawm tus cwj mem tee luam ntawv hauv zaj duab xis raws li cov khoom siv nplaum tus kheej yuav tsum muaj ntau txoj hauv kev. Los ntawm kev daws qhov ua rau tsis tshua muaj nro nro, UV kho tsis txaus thiab tus cwj mem ntau dhau, cov tshuab luam ntawv tuaj yeem txhim kho tus cwj mem adhesion thiab ua tiav cov ntawv luam tawm zoo dua. Siv cov kev kho saum npoo lossis cov tsho tiv no primer los txhim kho qhov nro saum npoo, ua kom zoo UV kho cov qauv kom ua tiav tus cwj mem kho tag nrho, thiab kho tus cwj mem formulations kom txo qis kev siv cov tshuaj ntxiv ntau dhau. Los ntawm kev txais yuav cov kev daws teeb meem no, cov tuam ntxhab tuaj yeem kov yeej cov teeb meem ntawm tus cwj mem poob thiab tsim cov ntawv luam tawm zoo ntawm zaj duab xis raws li cov khoom siv nplaum tus kheej.
