Silencing cotton structure

Abstract

The invention discloses a silencing cotton structure. Multiple fiber layers with high fiber apparent densities and multiple fiber layers with low fiber apparent densities are stacked in a staggered manner to form the silencing cotton structure, and each fiber layer with the high fiber apparent density is of an S-shaped structure. Compressive resilience performance in two dimensions of the silencing cotton structure is excellent owing to the fiber layers with the high fiber apparent densities and the S-shaped structures, so that the appearance and the dimensions of silencing cotton can be kept for a long time, and an optimal silencing effect can also be kept for a long time.

Description

technical field [0001] The invention relates to noise-reducing and sound-absorbing materials, in particular to a structure of sound-absorbing cotton. Background technique [0002] Noise pollution in daily life, industrial production and commercial environment is very serious, which has a serious impact on people's work and quality of life. In order to reduce the adverse effects of noise pollution, noise-absorbing cotton that can reduce noise has been widely used. [0003] At present, the sound-absorbing cotton is mostly made of fiber materials, and there are three main construction structures: one is the sound-absorbing cotton structure with a relatively uniform apparent density, and its resilience in all directions is also relatively uniform, but the resilience is not very good. Prominent, poor sound insulation; another kind of sound-absorbing cotton structure is composed of multiple layers of fiber layers with relatively high apparent density, and each fiber layer is stac...

AI Technical Summary

Problems solved by technology

[0003] At present, the sound-absorbing cotton is mostly made of fiber materials, and there are three main construction structures: one is the sound-absorbing cotton structure with a relatively uniform apparent density, and its resilience in all directions is also relatively uniform, but the resilience is not very good. Prominent, poor sound insulation; another kind of sound-absorbing cotton structure is composed of multiple layers of fiber layers with relatively high apparent density, and each fiber layer is stacked in parallel and inclined towards the same direction. In order to fill the fiber layer with low apparent density, the resilience of the sound-absorbing cotton structure in each direction is different. In the direction perpendicular to the fiber layer, the resilience after compression is very poor, and it is prone to permanent deformation. After deformation, the sound insulation effect is poor. will be severely reduced; moreover, the fiber layer with lower apparent density between the fiber layers with higher apparent density will form a straight sound transmission channel, which will affect the sound attenuation effect

The third type of sound-absorbing cotton structure is stacked by V-shaped fiber layers with high density. This structure has good resilience on both sides of the V-shaped structure, but poor resilience in the stacking direction of the V-shaped structure. This limits its use

Moreover, in terms of sound attenuation, the fiber layers with low fiber apparent density between the V-shaped structures only form simple and uniform channels, which also affects its sound attenuation effect.

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