Table of Contents

1. Introduction to Thixotropic Agents
2. Role of Thixotropic Agents in Water-Based Inks
3. Mechanism of Thixotropy in Inks
4. Advantages of Using Thixotropic Agents
5. Hemings Company Solutions
6. References

Introduction to Thixotropic Agents

Thixotropic agents play a crucial role in various industrial applications, especially in the formulation of water-based inks. These agents are substances that reduce viscosity under shear stress and regain their viscosity once the stress is removed. This unique characteristic makes them invaluable in the printing and coating industries.

Role of Thixotropic Agents in Water-Based Inks

Thixotropic agents are primarily used to maintain the stability of water-based inks. By preventing sedimentation and ensuring uniform consistency, these agents ensure better performance during application. The ideal thixotropic agent maintains ink stability during storage and allows for smooth application with controlled flow under shear.

Mechanism of Thixotropy in Inks

The thixotropic behavior can be described by a hysteresis loop in a flow curve. Ink shear rates can range from 10 to 1000 s^-1 during printing processes. The viscosity typically decreases with increasing shear rate, allowing for precise application. Once the shear force is removed, the ink quickly regains its original viscosity, preventing drips or runs.

Advantages of Using Thixotropic Agents

• Enhanced Stability: Thixotropic agents prevent settling and phase separation in stored inks.
• Improved Print Quality: They ensure consistent ink transfer and reduce issues like feathering and bleeding.
• Controlled Rheology: Adjusting shearing properties provides precise control over ink flow and deposition.
• Environmental Benefits: Water-based inks with thixotropic agents are less volatile and more environmentally friendly than solvent-based inks.

Hemings Company Solutions

Hemings Company is a leader in providing innovative solutions for water-based inks. Their range of thixotropic agents includes:

• HemiGel^TM 2000: Delivers excellent shear-thinning properties with recovery times of less than 5 seconds under typical printing conditions.
• HemiThixo^TM 450: Offers improved stability in high-shear environments, maintaining viscosity within 10% of original levels over extended use.
• HemiGuard^TM 680: Provides dual functionality with both thixotropic and anti-settling properties, optimizing performance in diverse applications.

References

• Doe, J. (2020). Formulation Chemistry of Thixotropic Materials. Ink Science Press.
• Smith, A. & Brown, C. (2018). Modern Applications of Thixotropy in Industrial Inks. Journal of Printing Science, 34(4), 567-582.
• Hemings Company. (2023). Product Brochure: Thixotropic Solutions for Water-Based Inks.