How Does Polyamide Resin Work in Coatings and Inks?

Polyamide resins are widely used in the coatings and inks industry, significantly enhancing product performance, durability, and adhesion.

Polyamide resins are synthetic polymers formed by the condensation of polyamines and dicarboxylic acids. They exhibit excellent chemical resistance, high thermal stability, and strong adhesion to various substrates. Below, we will explore the role of polyamide resins in coatings and inks in detail, supported by some real applications by our customers.

Main Properties of Polyamide Resins

Polyamide resins possess several properties that make them particularly suitable for coatings and ink formulations:Strong Adhesion(long-lasting adhesion is critical), Chemical Resistance(This ensures that coatings and inks maintain their integrity even when exposed to corrosive substances.), Durability(These resins significantly improve the durability of coatings and inks. They withstand wear, abrasion, and environmental factors), Flexibility(Polyamide resins enhance the flexibility of coatings, making them resistant to cracking or peeling under pressure.)

Product Applications in Coatings

In coatings, polyamide resins act as adhesives, binding pigments and other components together while forming a continuous film. They improve corrosion resistance, enhance gloss, and increase wear resistance. Polyamide-based coatings are commonly used in high-performance applications such as marine coatings, automotive topcoats, building coatings and industrial protective coatings.

Customers' Examples:

Marine Coatings: Our marine coatings manufacturers developed a new anti-corrosion coating using polyamide resins, significantly improving the durability of ship hulls in seawater and reducing maintenance costs. 

Automotive Coatings: Our automotive manufacturer customer  incorporated polyamide resins into the coatings for its premium models, ensuring the paint remained glossy and intact under extreme weather conditions.

Product Applications in Inks

In ink formulations, polyamide resins primarily serve as binders, firmly holding pigment particles together and ensuring strong adhesion to substrates like paper, plastic, or metal. This high adhesion is particularly evident in inks used for printing on non-porous surfaces, such as packaging materials or industrial labels.

Polyamide resins also enhance the ink's resistance to staining, fading, and abrasion, which is essential for the long-term clarity and quality of printed materials. They are compatible with various pigments and additives, making them versatile for different ink formulations, including flexographic and offset printing.

Customers' Examples：

Packaging Inks: Our packaging customers developed a new food packaging ink using polyamide resins, significantly improving the durability and vibrancy of printed designs.

Industrial Labels: Some industrial label manufacturers improved its ink formulation with polyamide resins, ensuring labels remained legible under high temperatures and humidity.

Environmental Benefits

In recent years, the coatings and inks industry has seen growing demand for eco-friendly solutions. Polyamide resins can be formulated into low-VOC (volatile organic compound) products, making them a more sustainable choice for many applications.

Customers' Examples：

Eco-Friendly Coatings: Some European coatings manufacturers launched a low-VOC coating based on polyamide resins, earning multiple environmental certifications and successfully entering the high-end construction market.

As we all know that polyamide resins play an important role in enhancing the performance of coatings and inks. Their excellent adhesion, chemical resistance, durability, and flexibility make them the better choice for high-performance applications across many industries.