What is EVA Foam

Mar 03, 2026

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EVA's Chemical Identity: EVA foam is actually a foamed form of ethylene-vinyl acetate copolymer, essentially combining the advantages of plastic and rubber. When the vinyl acetate content is between 10% and 40%, the material becomes both soft and elastic, and after foaming, it becomes the lightweight, sponge-like material we are familiar with. This structure gives it three major characteristics: cushioning, waterproofing, and plasticity.

 

EVA Hidden in Everyday Life

  • Footwear Midsole: The "walking on clouds" feel of athletic shoes comes from the cushioning performance of EVA.
  • Children's Products: The anti-slip surface of interlocking crawling mats is actually micro-foamed EVA.
  • Packaging Lining: The white filler in the custom-designed grooves of precision instrument packaging.
  • Sports Equipment: The anti-slip layer of yoga mats and the core material of floating boards all rely on it.

 

Why Choose EVA?

Compared to traditional foams, EVA has three outstanding advantages:

  • Its closed-cell structure prevents it from absorbing water and deforming in humid environments.
  • Its wide processing temperature range (80-160℃) makes it easy to mold into various shapes.
  • It has no irritating odor, and by adjusting the formula, it can also achieve antibacterial effects.

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