What Is Breathable TPU Film?
Breathable TPU film is a thin thermoplastic polyurethane membrane engineered to support a practical balance between liquid barrier performance and moisture vapor transfer. In a waterproof breathable fabric, the TPU layer becomes the functional membrane between face fabric, adhesive and lining. In medical or hygiene structures, it can help create a soft flexible barrier layer while supporting vapor management.
For B2B buyers, the real value is not only the film itself. Performance depends on the complete composite system: TPU chemistry, film thickness, adhesive, textile substrate, lamination temperature, washing conditions, sterilization direction, packaging method and final application environment.
Why hydrophilic TPU is used in waterproof breathable structures
A hydrophilic TPU membrane direction can move water vapor through the film structure while helping resist liquid water penetration. Compared with a simple non-breathable waterproof layer, it gives garment, dressing and protection-product developers a more comfortable material route when heat and humidity management matter.