The printhead is the heart of a digital printer. It converts digital signals into precise ink droplets that form images and text on media. Among the two main types—piezoelectric and thermal bubble—the piezoelectric inkjet printhead dominates due to its high precision, long lifespan, and wide ink compatibility.
Recently, the China Association for the Promotion of International Economic & Technical Cooperation released new standards for piezoelectric printheads. These cover terminology, technical specifications, testing, inspection, and packaging. This article explores these updates to help professionals understand the latest piezo inkjet printing requirements.
I. Terminology and Definitions
Piezo inkjet printhead: Converts electrical signals into mechanical energy via the inverse piezoelectric effect to eject ink.
1.Ink droplet volume: The volume of ink ejected by one nozzle (in picoliters).
2.Nozzle frequency response: The highest firing frequency with ≤3% volume deviation.
3.Nozzle life: Up to 7×10⁹ firings with ≤10% volume deviation.
4.Degradation of nozzle performance: Decline due to prolonged use or environment.
See more at Piezo Inkjet Glossary.
II. Technical Requirements
1.Structure: Smooth surface, precise alignment (≤±3 μm).
2.Performance: ≥20 kHz single-pulse frequency, life ≥7×10⁹ firings.
3.ESD Resistance: ±8 kV contact, ±15 kV air discharge, degradation ≤5%.
4.Resolution: ≥50 npi, ink droplet variance ≤2.5%.
5.Environmental tolerance: -20°C~60°C, humidity 30–80%.
Reference: GB 4943.1 Electrical Safety | GB 17625.1 EMC Standard.
III. Maintenance Tips
1.Use quality ink: Avoid poor-quality ink. SAVEN INK eco-solvent ink is designed for piezo printheads, ensuring smooth flow and vivid color.
2.Print regularly to prevent nozzle drying.
3.Cleaning:
Soft cleaning: Routine method.
Deep cleaning: Only for severe clogging.
Manual cleaning: For professionals only.
4.Prevent physical damage to the nozzle.
5.Control environment: Keep dust-free and stable temperature/humidity.
See more at Printhead Maintenance Guide.
IV. Conclusion
Piezoelectric inkjet printheads are the backbone of modern digital printing.
Standardization enhances reliability and print quality. Using certified inks such as SAVEN INK eco-solvent ink extends printhead life while ensuring vivid, accurate results.