Q1: Why is calcium carbonate added to EVA shoe soles?
A: Calcium carbonate is used to enhance EVA’s hardness, mechanical strength, and thermal stability. It also improves foam uniformity, reduces defects, and helps maintain the shape of midsoles and outsoles over time.

Q2: How does calcium carbonate affect cushioning in EVA shoes?
A: While it slightly increases stiffness, proper formulation ensures EVA remains soft and comfortable, providing a good balance between cushioning and support for various footwear applications.

Q3: Can calcium carbonate reduce production costs?
A: Yes, calcium carbonate is an economical filler that allows partial replacement of EVA resin, reducing material costs without compromising performance or quality.

Q4: Is calcium carbonate safe for footwear applications?
A: High-quality calcium carbonate used in EVA is chemically inert and safe for skin contact. It is widely used in both casual and athletic shoes globally.

Q5: What types of shoes benefit most from calcium carbonate-filled EVA?
A: Athletic sneakers, casual shoes, sandals, and safety footwear benefit the most due to improved durability, structural support, and foam consistency.