How to choose TPU film when producing massage seat airbags
The selection of TPU film hardness parameters needs to be guided by the core functional requirements of the airbag. The core reference index is Shore hardness (Shore A). The specific selection logic and the impact of incorrect selection are as follows:
2025-10-20
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How to choose TPU film when producing massage seat airbags
The selection of TPU film hardness parameters needs to be guided by the core functional requirements of the airbag. The core reference index is Shore hardness (Shore A). The specific selection logic and the impact of incorrect selection are as follows:
1. Mainstream selection and adaptation scenarios: The medium hardness range (80A-85A) is the mainstream in the industry. This hardness range can accurately balance the flexibility and stiffness of the air bag - the stiffness can ensure the effective support of the human body during massage and avoid "softening" of the massage intensity; the flexibility can adapt to the deformation needs of the air bag for high-frequency inflation and deflation, reducing stress concentration at the joints. This parameter is suitable for more than 90% of massage seat airbags in family cars and commercial cars, covering regular massage modes (such as kneading and beating).
2. Special scene adjustment: If the airbag needs to achieve gentle massage (such as customized seats for children and the elderly), you can choose a slightly lower hardness (75A-80A) to improve contact comfort; if it is used in high-frequency use scenarios of commercial vehicles (such as trucks, online ride-hailing), or needs to achieve strong massage (such as deep muscle relaxation mode), you can choose 85A-90A hardness to enhance durability and support.
3. The core impact of making the wrong choice:
- Choose a low hardness (60A-75A, not in special scenarios): the air bag stiffness is insufficient, the support force is attenuated during massage, and problems such as "insufficient pressing force" and "massage trajectory deviation" occur, and long-term use may easily lead to fatigue cracking of the membrane body due to excessive deformation, reducing the service life;
- Select a high hardness (above 90A, not in special scenarios): the flexibility will be greatly reduced, and the deformation resistance of the membrane body will increase during inflation and deflation. Not only will it easily cause "stuck and abnormal noises", but it will also subject the heat-sealed joints to excessive stress, significantly increasing the risk of rupture during the inflation and deflation process. At the same time, the stiffness when in contact with the human body will reduce the comfort of massage.
