Foamable EVA masterbatch incorporates chemical foaming agents (e.g., azodicarbonamide) or physical blowing microspheres, which release gases during heating to form uniform closed-cell or open-cell structures.

Flame-retardant EVA masterbatch significantly enhances the fire resistance of EVA materials by incorporating high-efficiency flame retardants (such as aluminum hydroxide, phosphorus-nitrogen composite systems, or brominated flame retardants). This formulation enables the material to achieve UL94 V-0, V-1, or HB ratings while complying with environm