The so-called popcorn sole refers to a new TPU shoe material, which is formed by foaming a large number of elastic foam balls, and the elasticity of the sole made of this material is also very prominent.

brief introduction

EVA foam material is the most widely used in the field of shoe materials, but there are some problems, such as large compression deformation, poor resilience, toxic decomposition products of chemical foaming agents used, and molecular chain crosslinking can not be melted and recycled. At present, researchers have improved the properties of EVA foam materials by mixing modification and other methods.

Polyurethane foam is synthesized by isocyanate, polyol, chain extender and additives. Its processing technology is simple, which is helpful to realize automatic production, so it is widely concerned. However, there are some problems in the processing process, such as poor resilience, poor aging resistance and poor environmental protection.

The material for making popcorn soles is called thermoplastic polyurethane foam beads (ETPU). Numerous elastic but light ETPU are gathered together to form this new polymer material.