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Automobile front wall sound insulation composite material

A technology for composite materials and automobiles, applied in vehicle parts, synthetic resin layered products, layered products, etc., can solve the problems of low strength of sound insulation materials, inability to achieve good sound insulation effect, poor sound insulation performance, etc., to increase effective sound absorption Distance, excellent sound insulation effect, effect of improving support performance

Pending Publication Date: 2019-01-25
广州泰力高汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Single-layer EVA sheet + PET hot-pressed fiber structure Due to the use of single-layer EVA sheet and PET hot-pressed fiber, the overall sound insulation performance of the product is poor, because of its poor sound insulation effect on high-frequency sound waves
[0004] The structure of embossed miscellaneous cotton + PET hot-pressed fiber has poor sound insulation performance of these two materials, resulting in poor overall sound insulation effect, and it cannot achieve good sound insulation effect when the thickness is thin, and the sound insulation effect on high-frequency sound waves is poor.
Moreover, the area of ​​the front wall of the car is relatively large, and the strength of the above-mentioned sound insulation material itself is not enough to support it to be fixed on the front wall of the car. It is often necessary to install additional supporting materials, which increases the cost and weight.
[0005] The above materials need to reach a higher thickness to achieve a better sound insulation effect, but the space of the car is limited, and it is often necessary to control the weight of the car

Method used

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  • Automobile front wall sound insulation composite material
  • Automobile front wall sound insulation composite material
  • Automobile front wall sound insulation composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The car front wall sound insulation composite material is made of three layers of materials bonded at high temperature. The material of the first polymer sheet and the second polymer sheet is EVA, and the density is 1.7g / mm 3 ; The thickness of the first polymer sheet on the side of the noise source is 1.7mm, wherein the continuous raised obstacles on the side of the first polymer sheet facing the sound-absorbing cotton are square pyramids, and the size of the square pyramids is 1.0×1.0× 1.0mm (height) (the thickness of the bottom layer of the first polymer sheet is 0.7mm, and the material thickness after flattening the first polymer sheet is theoretically calculated to be 1mm), the side facing the noise source is a smooth surface; the second polymer sheet The thickness of the sheet is 1.0mm, and both sides are smooth; the material of the sound-absorbing cotton layer is PET / PP two-component fluffy fiber cotton, the fiber fineness is 3-30 denier, and the weight is 400g / m ...

Embodiment 2

[0035] The difference between the automobile front wall sound insulation composite material of this embodiment and that of Embodiment 1 is that the size of the four-pyramid-shaped raised obstacle of the first polymer sheet on the side of the noise source is 1.5×1.5×1 mm (height), and the other same aspect.

Embodiment 3

[0037] The difference between the automobile front wall sound-insulating composite material of this embodiment and that of Embodiment 1 is that the obstacle size of the quadrangular pyramid-shaped protrusion of the first polymer sheet on the side of the noise source is 0.5×0.5×1 mm (height), and the other same aspect.

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Abstract

The invention discloses an automobile front wall sound insulation composite material. The material comprises a sound absorbing cotton layer of an intermediate layer and a first polymer sheet and a second polymer sheet on both sides of the sound absorbing cotton layer, the first polymer sheet faces one face of the sound absorbing cotton layer and is provided with raised obstacles continuously covering the surface, the other side is a smooth surface, and the second polymer sheet is smooth on both sides. An acoustic interlayer channel is formed between the first polymer sheet and the second polymer sheet, the raised obstacles can refract sound waves to greatly change the direction, the transmission distance of the sound waves in the sound absorbing cotton layer is increased, and a sound absorption cotton absorbs the sound waves more effectively. The composite material has physical structure sound insulation, has the advantages of good sound insulation effect, light weight, good support and the like, has good sound insulation effect on high frequency sound waves, and is mainly used for sound insulation of the front wall of an automobile.

Description

technical field [0001] The invention relates to the technical field of sound-insulating composite materials, in particular to a sound-insulating composite material for the front wall of an automobile. Background technique [0002] With the rapid development of the automobile industry and product upgrades, more and more attention has been paid to the acoustic performance of automobiles. When the car is running at high speed, the vibration noise of the engine, wind noise and road noise are directly transmitted into the car through the front wall, because it is the high-frequency sound waves generated by the friction of various mechanical parts. In order to better improve the acoustic performance of the car, high-performance The soundproof front wall is one of the indispensable car parts. And now consumers have higher and higher demands on the interior space of automobiles, therefore, thick and thick front wall sound insulation materials are gradually eliminated by the market....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/08B32B27/36B32B27/02B32B27/32B32B5/08B32B3/30B32B33/00
CPCB32B3/30B32B5/08B32B27/12B32B27/306B32B33/00B60R13/08B32B2262/14B32B2307/102B32B2262/0253B32B2262/0284B32B2250/40B32B2605/08
Inventor 何学斌孙继承罗敏雄
Owner 广州泰力高汽车零部件有限公司