Technical Guides & Know-How
Four Major EVA Foaming Processes for Shoe Soles
EVA (Ethylene Vinyl Acetate) is widely used in footwear manufacturing due to its lightweight properties, excellent resilience, and good processability. With the continuous upgrading of footwear performance requirements and manufacturing technologies, EVA sole foaming processes have gradually become more diversified and mature.
At present, the mainstream EVA foaming processes in the industry mainly include **traditional flat-sheet foaming, in-mold micro foaming, injection crosslinked foaming, and supercritical foaming**. Each process has its own characteristics in terms of foaming mechanism, product performance, and production cost, which directly affect the appearance quality of shoe soles and their suitability for subsequent processing. A thorough understanding of the characteristics and differences of these four EVA foaming processes is the foundation for achieving stable production and high-quality EVA shoe soles.
