Q1: How does calcium carbonate improve EVA foam processability?
A: Calcium carbonate acts as a nucleating agent, controlling bubble formation during EVA foam production. This leads to uniform cell structures, smoother surfaces, and reduced material waste.

Q2: How much calcium carbonate is typically added to EVA?
A: The content generally ranges from 5% to 20% by weight, depending on desired hardness, flexibility, and thermal stability of the final EVA component.

Q3: Does calcium carbonate affect thermal resistance of EVA shoes?
A: Yes, it increases EVA’s thermal stability, allowing the material to withstand higher processing temperatures without deformation.

Q4: Can calcium carbonate improve the appearance of EVA soles?
A: Yes, it fills micro-voids in the foam, providing smoother surfaces and better printability for textures, patterns, or logos.

Q5: Are there alternatives to calcium carbonate in EVA?
A: Other fillers like talc or silica can be used, but calcium carbonate offers a cost-effective solution with excellent reinforcement, foam control, and surface improvement for footwear applications.