TPU material is the abbreviation of Thermoplastic Urethane, thermoplastic polyurethane elastomer. TPU is a polymer material formed by co-reacting diisocyanate molecules such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) with macromolecular polyols and low molecular polyols (chain extenders).Application range of TPU:TPU has been widely used in: shoe materials, garments, inflatable toys, water and underwater sports equipment, medical equipment, fitness equipment, car seat materials, umbrellas, luggage, bags, etc.TPU film is widely used in sports shoes: trademark decoration on soles and uppers, air bags, air cushions, oil bags, etc.There are two trends in the application of TPU film on sports shoes:One is to screen-print and color the TPU film first, then form it with high frequency and glue it on the shoe surface for decoration, so as to obtain special decorative effects.The second is to use waterproof and moisture-permeable TPU film and shoe material cloth to achieve waterproof and moisture-permeable effect