Automobile front wall noise elimination part and preparation method thereof

Abstract

The invention provides an automobile front wall noise elimination part and a preparation method thereof. The noise elimination part sequentially comprises a sound insulation layer, a bonding layer anda noise elimination layer from outside to inside; the sound insulation layer and the noise elimination layer are composed of composite fibers; the composite fibers comprise first fibers and second fibers; the fineness of the first fibers is larger than that of the second fibers; the length of the second fibers is 30-50 mm; the linear density of the second fibers is 0.05-0.5 dtex. According to theautomobile front wall noise elimination part, the sound insulation layer and the noise elimination layer are arranged, so that the automobile front wall noise elimination part has excellent sound absorption performance and sound insulation performance at the same time, particularly, the superfine fibers are adopted, the noise elimination layer can form a loose porous structure, the sound absorption performance is greatly improved, sound energy can be consumed through vibration of the superfine fibers, and the sound absorption performance and the sound insulation performance are improved; by using the superfine fibers, the weight of the part can be reduced, and the light weight of an automobile is realized.

Description

technical field [0001] The invention belongs to the technical field of processing automotive interior parts, and relates to an automobile front wall noise reduction part and a preparation method thereof. Background technique [0002] With the development of society and economy, the use of cars has become more and more popular, and consumers have higher and higher requirements for the performance of cars. In addition to being a means of transportation, they pay more attention to driving experience. Car noise is an important criterion for measuring car performance, and car noise is mainly transmitted from the car engine to the car cockpit. In order to reduce noise, the noise transmission path should be controlled. The front wall of the car is located between the engine compartment and the passenger compartment. The parts between them have an important contribution to improving the comfort of driving and riding, and should have good sealing, vibration isolation and sound insula...

AI Technical Summary

Problems solved by technology

[0005] At present, the cowl structure materials on the market also use low-melting-point fibers and cotton fibers, etc. CN107599564A discloses a preparation method of PET / PP composite sound-absorbing material. The steps of forming, cooling and setting, water cutting, packaging and warehousing, the sound insulation pad is made of multi-layer sound-absorbing materials, including the outer centrifugal cotton mesh surface, the middle layer of activated carbon fiber mesh surface and the inner layer of PET / PP composite mesh surface , in order to achieve a better sound-absorbing effect, but the composite fiber does not involve the fineness, which makes it difficult to effectively improve the sound-absorbing performance of the product, and the composite sound-absorbing material mainly improves the sound-absorbing performance, and does not involve the improvement of the sound-insulating performance

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