The choice of material for car seat massage airbags directly affects the massage experience, durability, and safety. Thermoplastic polyurethane (TPU) film has become the mainstream choice for high-end and mid-range vehicles, outperforming traditional materials such as polyvinyl chloride (PVC) film.
The core advantage of TPU film lies in its customizable physical properties. For example, its thickness can be adjusted within the range of 0.15-0.3mm. During inflation and deflation, it can precisely switch between gentle pressing and deep kneading pressure, and its deformation recovery rate is as high as 99%, avoiding permanent deformation. Compared to the localized bulging problem that is common with PVC film, TPU film provides more uniform massage contact points. In terms of durability, TPU film is optimized through molecular chain cross-linking, achieving a heat distortion temperature of 120℃ and a glass transition temperature as low as -50℃. After 1 million high-frequency inflation and deflation cycles, its tensile strength retention rate exceeds 90%, and its service life can reach 8 years or 200,000 kilometers, more than twice that of PVC film.
Environmental friendliness and processing adaptability are also key characteristics of TPU film. Its production process involves no solvent release, VOC content is far below national standards, and it has passed international certifications such as REACH, making it suitable for the health requirements of enclosed cabins. It also supports high-frequency welding and die-cutting processes, allowing for the molding of multi-chamber irregular structures. Its processing efficiency is 30% higher than PVC film, and it is 100% recyclable, contributing to the sustainable development of the automotive industry.
In intelligent seat systems, the thinness of TPU film (as thin as 0.15mm) provides space for sensors and micro-air pumps, supporting zoned massage and intelligent linkage, further enhancing the personalized comfort experience.