Wax Additives for UV-Curable Inks in Packaging and Labels

UV-curable inks are rapidly expanding in the packaging and label industry due to their fast curing, low VOC content, and excellent adhesion. However, their inherently brittle film structures can make them prone to scratching, scuffing, and poor slip.

Wax additives are crucial for optimizing UV ink formulations, ensuring both durability and print aesthetics.

Key Challenges in UV-Curable Inks

1. Scratch Resistance: Brittle UV ink films are easily scratched.

2. Slip Requirements: Surfaces must glide smoothly in processing lines.

3. Surface Feel: Premium packaging demands silky or matte tactile finishes.

4. Chemical Resistance: UV inks must resist oils, solvents, and cleaning agents.

Wax Additive Benefits

• Scratch Resistance: PE and PTFE waxes provide surface toughness.

• Slip Control: Wax reduces friction, enabling efficient converting.

• Surface Feel: Adjusts tactile properties from silky smooth to matte.

• Stain Resistance: Improves resistance to household chemicals and oils.

Application Cases

• Luxury Packaging: A cosmetics packaging supplier used micronized PE wax for enhanced scratch resistance and silky feel.

• Label Printing: A UV ink formulator applied PTFE-modified wax to improve slip and reduce scuffing in roll-to-roll applications.

Technical Insights

• PTFE Blends: Offer superior slip for high-speed label production.

• Particle Size: Ultra-fine wax is preferred for transparent and glossy applications.

• Compatibility: Oxidized PE waxes disperse well in acrylate-based UV systems.

UV inks must deliver durability, aesthetic appeal, and fast processing efficiency. Wax additives are the ideal solution for improving scratch resistance, slip, and surface feel in packaging and label applications.

Get in touch with us today for expert guidance and customized wax additive solutions for your UV-curable inks. Request samples and discover how we can enhance your formulations.