Si-TPV Modifier: The Key to Preparing Ultra-Light Highly Elastic and Eco-Friendly EVA Foaming Materials

3. Challenges in the Chemical Foaming Process of EVA Foam Materials
The chemical foaming process used in EVA foam production presents several key issues: Decomposition Temperature Mismatch: the decomposition temperature of a chemical foaming agent is required to be above the temperature at which EVA is close to melting by an EVA chemical foaming process, and the decomposition temperature of the chemical foaming agent is very wide and the decomposition process involves chemical balance, so that the chemical foaming agent still remains in a large amount in a material matrix after foaming is finished, measures of refining the low-temperature EVA in an unmelted state and increasing the addition of a series of auxiliary agents such as a cross-linking agent, stearic acid, a cross-linking initiator, a chemical foaming agent decomposition catalyst, a plasticizer and the like are mainly adopted in the industry for reducing the influence of the residual foaming agent on the foaming performance of the material, but the measures directly cause a large amount of micromolecular auxiliary agents easy to migrate in a final product, and the auxiliary agents continuously migrate to the surface of the product from the inside along with long-time use, so that skin infection or other pollution contacted with the product is caused.
Simultaneous Foaming and Crosslinking: in the chemical foaming process, the decomposition of the chemical blowing agent determining the foaming behavior and the chemical crosslinking determining the melt rheology behavior proceed simultaneously, and the temperature suitable for the decomposition of the chemical blowing agent is not the temperature most suitable for the melt rheology for cell nucleation and growth.
Dynamic and Temperature-Sensitive Process:The interaction between foaming and crosslinking is highly dynamic and temperature-sensitive, making it difficult to optimize the foam’s cell structure. The complexity of managing these concurrent processes makes it challenging to produce consistent, high-quality EVA foam using chemical foaming methods. In a word, the variation amount of foaming additives and catalysts in the molding process of EVA foam can affect its density, hardness, color, resilience, and so on.

4. Research and Innovation in EVA Foam
To address the limitations of traditional EVA foaming, manufacturers have been exploring innovative solutions. One promising approach is combining EVA with other elastomers to enhance performance. This is particularly important as the industry seeks materials that offer both improved functionality and environmental benefits.
5. Si-TPV: A Game Changer for Eco-Friendly EVA Foam
SILIKE’s Si-TPV is a groundbreaking thermoplastic silicone-based elastomer that serves as a high-performance modifier for EVA foam. By introducing Si-TPV modifier into EVA foam materials, and leveraging chemical foaming technology, manufacturers can create microporous EVA foams with significant advantages: environmental sustainability, low thermal shrinkage, no chemical migration, and adjustable foaming ratios. This innovation streamlines the production process, resulting in energy savings while improving the mechanical properties of EVA foam. Si-TPV reduces the presence of residual foaming agents, minimizes foam pore sizes, and achieves an ideal balance of low density, high resilience, excellent wear resistance, and reduced thermal shrinkage. Additionally, it enhances the color vibrancy of EVA foams, driving improvements in comfort, aesthetics, durability, and sustainability. Discover the Future of EVA Foam, enhance your products with Si-TPV-modified EVA foams. Contact SILIKE via email at email: amy.wang@silike.cn to learn how this innovative Thermoplastic Silicone Elastomers material can transform your production process and deliver superior results.