Footwear Materials

Guided by gas phase differentiation, German Quality TPU materials are made into ultra-light expanded TPU beads with high resilience. Like popcorn, these beads can expand 5 to 8 times of the original size. There are numerous cells whose diameters range from 30 to 300um containing plenty of air inside the beads.

The closed cells give low density, high resilience and elasticity to the expanded beads. About 2,000 beads are turned into needed shapes through SCM (Steam Chest Molding) or RF Wave Foamer processes during which the surface of beads melt a little to adhere into fixed geometry, while interior cells do not change.

The sole made from expanded beads compresses to half the size under impact, largely reducing the pressure on the foot. And the sole springs back into its original shape immediately after impact.