Product Name: Car sound-absorbing cotton, Brand: Wan Li Material: Polyester Color: gray and black Product Specifications: 1 * 20m Place of Origin: Dongguan Product Level: FD Wan Li Low selling car special sound-absorbing cotton, own production wholesale , reliable, environmentally preferred, cheap, details, contact customer service or click on our "Wan Li" Wan Li automotive environmental acoustic, noise cotton, initiated the idea of ??a lightweight environmentally sound, perfect integration brace, sealing, noise, acoustic principle, as you create a natural harmonious state control, so you are free to walk through between leisure and business, calm aggressive, dynamic and static one! Standard 1 car absorbing material lighter and lighter is the trend of the development of the automotive manufacturing, lightweight materials after construction does not make too much body weight increase, increase fuel consumption. 2, in a wide frequency band noise performance and good sound absorption, sound-absorbing performance of long-term stable and reliable. 3, there is a certain strength, installation and use not damaged, not aging, good weather resistance and long service life. 4, neat appearance, no pollution. 5, moisture-proof waterproof, corrosion moth, easy to mold. 6, nonflammable, preferably fire retardant. 7, environmentally friendly materials, non-asbestos, glass fibers and other harmful substances. 8, to facilitate the construction material itself, such as: easy to cut, paste, solid and so on. Folding good car noise insulation project is a family car will do the project, especially from 100,000 to 300,000 in the luxury car, because the car sound engineering enables you to drive traffic in a quiet environment. Specifically, sound engineering systems usually after damping, noise reduction, sealing three steps. First, the four doors, the trunk, the car floor, the engine compartment and roof were damping process; implementing damping process, there are primary and secondary points: First, the doors and the trunk, since most of the noise is by car The suspension system, trunk, chassis, doors and other parts of the incoming car; second is the car floor and engine compartment; and finally the roof. Secondly, the whole car were acoustic, noise reduction; and finally, to be sealed inside the vehicle.