Application of defoamers for screen printing inks: Effectiveness in multiple scenarios
The application range of defoamers for screen printing inks is wide, covering a variety of ink systems and related
printing processes, as follows:
1. Ink system
Screen printing ink
Applicable to all types of screen printing inks, including water-based screen printing inks, oil-based screen printing
inks and UV light-curing screen printing inks, which can effectively eliminate bubbles generated by mechanical stirring,
pumping and other operations during the printing process to ensure the clarity and consistency of the printed pattern.
UV ink
For UV light-curing ink systems, defoamers can inhibit the generation of bubbles before and after curing, avoid surface
defects caused by bubbles, and improve the flatness and wear resistance of the cured coating.
Water-based inks
In water-based inks, defoamers can quickly break the foam generated by processes such as stirring and grinding, and
prevent problems such as printing color difference and pinholes caused by residual foam.
Solvent-based inks
For solvent-based ink systems, defoamers can reduce bubbles generated during solvent evaporation, ensuring the
smoothness of the printing process and the glossiness of the final product.
2. Printing process
Screen printing
In screen printing, defoamers can prevent bubbles from being generated by the ink under the action of the scraper, avoid
defects such as white spots and missing prints in the pattern, and improve the quality of printed products.
Gravure printing
Applicable to gravure printing ink system, it can eliminate bubbles generated by the ink during the rotation of the gravure
roller to ensure the fineness and layering of the printed pattern.
Offset printing and other printing processes
In offset printing, flexographic printing and other processes, defoamers can improve the fluidity of the ink, reduce printing
failures caused by bubbles, and improve production efficiency.
3. Other application areas
Coatings and varnishes
Can be used in systems such as water-based varnishes and UV varnishes to eliminate bubbles during the coating process and
improve the flatness and glossiness of the coating.
Industrial processing
In industrial oils such as lubricants, glues, and fatliquors, defoamers can prevent bubbles generated by mechanical stirring and
ensure the performance of the product.
4. Environmental adaptability
High temperature resistance, acid and alkali resistance: The defoamer can continue to play a defoaming role under harsh conditions
such as high temperature, strong acid and alkali, and is suitable for printing processes that require high temperature curing.
Wide temperature range: It remains stable in a wide temperature range and adapts to the needs of different printing environments.
5. Usage recommendations
Additional amount: The recommended addition amount is usually 0.1%-0.5%, and the specific amount needs to be adjusted according
to the ink system and process conditions.
Usage method: It can be added continuously with a metering pump or added after pre-dilution to ensure that the defoamer is evenly
dispersed.
