Ethylene Vinyl Acetate (EVA) foam is a ubiquitous material known for its flexibility, light weight, and excellent cushioning properties, making it ideal for applications ranging from footwear and sports equipment to packaging and insulation. The creation of these desirable cellular structures heavily relies on effective foaming agents, with Azodicarbonamide (AC) standing out as a primary choice. As a leading China-based supplier of AC blowing agents, we delve into why Azodicarbonamide is indispensable for EVA foam production and how to source it effectively.

Why Azodicarbonamide is the Go-To for EVA Foam

Azodicarbonamide (CAS 123-77-3) is a chemical blowing agent prized for its ability to generate a high volume of nitrogen gas upon thermal decomposition. This characteristic is perfectly suited for EVA foam production, offering several key advantages:

  • Fine and Uniform Cell Structure: When properly processed, Azodicarbonamide leads to the formation of fine, evenly distributed cells within the EVA matrix. This results in a smooth surface finish, consistent density, and optimal cushioning performance.
  • High Gas Yield: AC typically offers a high gas yield (e.g., 220-235 ml/g), meaning a small amount of the foaming agent can produce a large volume of foam, contributing to cost-effectiveness.
  • Good Dispersion: With appropriate particle size control (e.g., 3-10 µm), Azodicarbonamide disperses well within the EVA compound, ensuring uniform foaming throughout the material.
  • Compatibility with EVA Processing: The decomposition temperature range of Azodicarbonamide often aligns well with the processing temperatures used for EVA, facilitating efficient and controlled foaming during molding or extrusion.

Key Considerations When Buying Azodicarbonamide for EVA

For manufacturers producing EVA foam, selecting the right grade of Azodicarbonamide is critical. Factors to consider include:

  • Specific AC Grade: While general-purpose AC is effective, specific grades may be tailored for different EVA processing methods, such as injection molding or compression molding. Different particle sizes and decomposition temperature modifications can optimize foam structure and processing stability.
  • Synergistic Effects: Sometimes, Azodicarbonamide is used in conjunction with other blowing agents or activators to fine-tune the foaming process and the final properties of the EVA foam.
  • Supplier Reliability: Sourcing from a reputable manufacturer and supplier in China ensures you receive consistent quality, competitive pricing, and reliable delivery of your Azodicarbonamide.

Applications of Azodicarbonamide-Foamed EVA

The versatility of Azodicarbonamide-foamed EVA means it's found in a multitude of products:

  • Footwear: Athletic shoe midsoles and insoles benefit from the cushioning and lightweight properties.
  • Sports Equipment: Yoga mats, protective padding, and fitness gear utilize EVA foam for comfort and impact absorption.
  • Packaging: Protective inserts for electronics and fragile items.
  • Craft and Toy Industries: For easily workable and safe foam sheets.

Partnering with a Leading Azodicarbonamide Manufacturer

As a dedicated supplier of Azodicarbonamide, we understand the specific demands of the EVA foam industry. We offer high-quality AC blowing agents that are crucial for achieving superior product quality and performance. When you are looking to buy Azodicarbonamide, consider our expertise and product range. Contact us today for a quote, samples, and technical consultation to ensure you are using the most effective Azodicarbonamide for your EVA foaming applications. We are your reliable partner for essential chemical auxiliaries.