Thixotropy

Thixotropy is the property of certain fluids, such as printing inks, to decrease viscosity under stress, returning to normal when the stress is removed.

Synonym

Viscosity Modulation

Examples

 

1. Printing Inks: Thixotropic inks flow smoothly during printing due to reduced viscosity under mechanical stress, ensuring consistent coverage and color intensity. Examples include UV-curable inks and solvent-based inks.
2. Adhesives: Thixotropic adhesives are easy to apply, becoming less viscous during application for better spreading and then regaining viscosity for strong bonding. Common examples are acrylic adhesives and silicone sealants.
3. Enhanced Print Quality: Thixotropic inks contribute to consistent ink application, reduced splattering, and improved print quality, especially in high-speed printing processes like web offset printing.
4. Operational Efficiency: Reduced clogging in equipment and improved flow control enhance printing efficiency and minimize downtime, leading to cost savings and increased productivity.

Recommendations

 

• Ink Formulation: Adjust ink viscosity for specific printing processes and substrates to optimize print results and prevent issues like clogging. Consider thixotropic additives for better flow control.
• Handling and Storage: Properly store thixotropic inks to maintain their properties and prevent settling or separation, ensuring reliable performance during printing operations. Use agitators or mixing equipment before use to re-establish thixotropic properties.

Thixotropy is crucial for optimizing print quality, efficiency, and equipment performance in the printing industry. Explore how thixotropy can enhance your print processes and ink formulations for superior results and cost-effective operations. Contact AP&B today to learn more.