Damping sheet for a vehicle

The five-layer damping film design, including a corrosion-resistant protective layer, a reinforcing layer, a double damping layer, and a composite sound-absorbing channel, solves the problem of insufficient absorption of low-frequency noise by traditional damping films, achieving noise reduction and durability improvement across the entire frequency range, and providing a quiet and comfortable in-vehicle environment.

CN224360832UActive Publication Date: 2026-06-16IIDA FOSHAN IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
IIDA FOSHAN IND
Filing Date
2025-07-25
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Traditional damping films have a simple sound-absorbing hole design, making it difficult to effectively absorb low-frequency noise and unable to meet the noise reduction requirements across the entire frequency range.

⚗Method used

The damping film adopts a five-layer structure, including a corrosion-resistant protective layer, a reinforcing layer, a double damping layer, a magnetic composite layer, and an adhesive layer. The double damping layer is set with sound-absorbing holes with different porosities to form a through composite sound-absorbing channel. Multi-level energy dissipation is achieved through material and structural optimization.

🎯Benefits of technology

It significantly broadens the noise reduction frequency band, improves the absorption effect of noise at different frequencies, enhances the sound absorption performance and durability of the material, provides a quiet and comfortable in-vehicle environment, and also has good corrosion resistance and ease of construction.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of damping rubber sheet, specifically disclose a damping rubber sheet for car, including damping rubber sheet main part, damping rubber sheet main part includes from top to bottom sequentially arranged corrosion -resistant protective layer, reinforcing layer, double damping layer, magnetic composite layer, first adhesive layer, double damping layer includes laminated arrangement and close reinforcing layer's upper damping layer, far away reinforcing layer's lower damping layer, the upper damping layer, lower damping layer all are provided with a plurality of sound absorption holes, the porosity of upper damping layer is greater than the porosity of lower damping layer. Double damping layer can carry out graded absorption and processing to the noise of different frequency, and the larger porosity of upper damping layer is favorable to absorb middle high frequency noise, and the smaller porosity of lower damping layer has better absorption effect to low frequency noise, thereby can effectively widen the noise reduction frequency band of this damping rubber sheet, significantly improve the overall noise reduction performance, can effectively reduce various noises in the car, create a quiet and comfortable in-car environment for the driver and passenger.
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