Application of TPU composite film in breathable fabrics for shoes

TPU composite film is a functional film made of thermoplastic polyurethane as the main raw material. It has extensive and important applications in the field of breathable shoe fabrics. The TPU composite membrane has two core properties: waterproofing and moisture permeability. Its molecular structure contains hydrophilic groups, which can conduct the water vapor emitted by the human body in the shoes to the outside of the membrane through adsorption, diffusion and desorption, while preventing external moisture from penetrating, thereby keeping the shoes dry and comfortable.

In sports shoes and outdoor shoe products, TPU composite films are usually used together with various fabrics to form waterproof and moisture-permeable composite fabrics. This fabric can be used for uppers, tongues, linings, and uppers to keep feet dry and warm even when walking for a long time in heavy rain or humid conditions. Compared with traditional waterproof coating materials, TPU composite membrane is soft, elastic and wear-resistant, and will not affect the original flexibility and wearing experience of the fabric.

In addition, the TPU composite film also has good hydrolysis resistance and low temperature resistance, and can adapt to various complex climate conditions. It can be compounded with various materials such as knitted fabrics, woven fabrics, and sandwich mesh fabrics through hot-melt lamination technology. It has excellent processing performance and strong adaptability. As consumers' requirements for the comfort and functionality of footwear products continue to increase, TPU composite membranes will have broader application prospects in the field of breathable shoe materials, bringing better waterproof and moisture-permeable solutions to the footwear industry and promoting the continued progress of functional shoe material technology.