carbodiimide in heat transfer PU Resins

Advancing Heat Transfer PU Resins: A Guide to Different Types and the key additives to improve abrasion resistance and washability


Heat transfer printing has revolutionized the textile industry with its versatility and vibrant results. A key component in this process is the heat transfer polyurethane (PU) resin. This article explores the various types of heat transfer PU resins, highlighting their unique characteristics and applications, and sheds light on the application of polycarbodiimide to enhance their performance.

Polyester-Based Heat Transfer PU Resins

Polyester-based heat transfer PU resins are renowned for their exceptional durability and softness. They are suitable for a wide range of applications, including textiles, leather, and other materials. These resins offer excellent adhesion and long-lasting performance, allowing intricate designs to withstand stretching, bending, and general wear without cracking or peeling.

Polyester-based PU resins are susceptible to hydrolysis due to the presence of ester linkages in their molecular structure. Ester linkages are susceptible to breaking down when exposed to water or moisture over time, leading to a reduction in the performance and durability of the resin.

To mitigate the hydrolysis issue and improve the water resistance of polyester-based PU resins, the addition of anti-hdyrolysis agent is commonly employed.

Polyether-Based Heat Transfer PU Resins:

Polyether-based heat transfer PU resins excel in softness and elasticity. They are commonly used for applications that require high flexibility and stretchability, such as sportswear, elastic fabrics, and materials that undergo repetitive movements. Polyether-based resins provide excellent stretchability and durability, ensuring designs maintain their integrity even during intense activities.

Water-Based Heat Transfer PU Resins:

Water-based heat transfer PU resins are environmentally friendly and have low volatility. They are ideal for heat transfer applications on textiles and other materials. These resins can be transferred using heat press or heat transfer machines. Water-based heat transfer PU resins exhibit excellent adhesion, durability, and ease of use, making them a popular choice for high-quality designs that are easy to clean and maintain.

To improve the abrasion resistance and washability of water-based PU resin, polycarbodiimide is commonly employed as an additive. Polycarbodiimide acts as a crosslinking agent, forming chemical bonds within the resin matrix.

The incorporation of polycarbodiimide enhances the crosslinking density of the PU resin, resulting in a more robust and durable coating. The crosslinked structure provides increased resistance to abrasion, preventing the resin from wearing off or deteriorating when subjected to friction or mechanical stress.

Additionally, polycarbodiimide improves the washability of the water-based PU resin. The crosslinked network created by polycarbodiimide enhances the cohesion and adhesion of the resin, making it more resistant to water and detergent-based cleaning processes. This allows the coated surface to withstand repeated washing without compromising its integrity or appearance.


Selecting the right type of heat transfer PU resin is essential to achieve the desired results in textile printing. Polyester-based, polyether-based, water-based resins offer unique characteristics and advantages for various applications. By incorporating anti-hydrolysis agents or polycarbodiimide crosslinkers, manufacturers can further enhance the performance and durability of heat transfer prints. Embrace the possibilities of different heat transfer PU resin types and harness the power of anti-hydrolysis agents or polycarbodiimide to create stunning, long-lasting designs in the world of textile printing.

Contact us today to explore our range of heat transfer PU resins and discover how anti-hydrolysis agents or polycarbodiimide can elevate the quality and durability of your heat transfer applications.

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