What is the layer of cotton in the trunk?
4 Answers
The layer of cotton in the trunk is sound insulation cotton. The functions of sound insulation cotton are as follows: Waterproof performance, avoiding metal sheet corrosion: After sound insulation is applied to the car door, the sound insulation cotton is directly adhered to the door metal sheet. Utilizing the good waterproof performance of the sound insulation cotton effectively prevents moisture from contacting the door metal sheet, providing anti-corrosion effects. Effectively alleviates metal fatigue in the chassis: Metal fatigue occurs due to the uneven internal structure of the metal, causing an imbalance in stress transmission, with some areas becoming stress concentration zones. There are also many tiny cracks in the internal defects of the metal. Under continuous force, these cracks will grow larger, reducing the portion of the material that can transmit stress until the remaining part can no longer bear the load, leading to complete failure of the metal component.
The fabric layer in the trunk is actually a soundproofing material, typically made of polyester fiber or similar soft synthetic compounds. Its primary function is to absorb various noises generated during driving, such as engine sounds, road noise, or tire friction, making the cabin quieter and reducing fatigue on long trips. It also protects the trunk surface from scratches caused by hard objects directly contacting the painted or plastic interior walls. In hot weather, it provides slight thermal insulation, preventing the spare tire from overheating and deforming. If it gets damaged or dirty, don't worry—simple dust can be cleaned with a vacuum cleaner; for severe wear, matching fabric pads are available online for easy DIY replacement at an affordable price, usually just a few dozen yuan. However, avoid washing it with water, as the material tends to absorb moisture, becoming stiff and deformed. Overall, this small design enhances comfort and practicality.
As a car owner, I often store items in the trunk, and that layer of padding serves as both a scratch-proof and sound-insulating material. It's soft in texture, somewhat like a thick blanket, laid at the bottom to prevent items from scratching the interior lining. When the noise level is high, especially on highways, it blocks some of the sound, making conversations inside the car clearer. Cleaning is straightforward—just vacuum it regularly. Avoid using water or strong detergents to prevent damage. If it wears out or tears, you can buy a new one at an auto parts store. DIY replacement isn’t difficult, saving you the cost of a repair shop visit. I find this design quite practical, especially when moving heavy items, as it protects the trunk from damage and keeps the space looking tidy. In short, it’s not high-tech, but it’s essential for daily car maintenance.
That layer of cotton is primarily a sound-absorbing material, similar to felt or synthetic fiber, laid inside the car to reduce noise interference while driving. Without it, the humming noise during driving would be much louder, making people more fatigued. It also protects the trunk from being scratched by hard objects, avoiding repair costs. I always take a quick look at the condition of the cotton when inspecting my car to ensure it stays clean and intact. If it's worn or damp, I use a vacuum cleaner to clean it without getting it wet to avoid damage, and replacement isn't complicated either.
