A composite broadband sound-absorbing insulation board

Abstract

The invention discloses a composite broadband sound absorption insulation plate which is composed of sound absorption coatings, a glass fiber plate, a porous plate and a cavity. The composite broadband sound absorption insulation plate is characterized by being composed of four layers of structures which refer to the sound absorption coatings at the outmost layer, the glass fiber plate, the resin-based porous plate, and the cavity structure at last. The glass fiber plate is of a multi-layer structure which is formed in the mode that the volume weight is gradually increased, and the thicknesses of all the layers of the glass fiber plate are the same. Holes of the porous plate are formed by the fact that before resin-based materials are formed, a foaming agent and high-pressure inert gas of a proper amount are led in under the conditions of pressurization and high temperature so that a large number of holes are formed. The insulation plate formed in this way has the advantages of being light, low in cost, and good in sound absorption performance.

Description

technical field [0001] The invention relates to a sound-absorbing and heat-insulating board, in particular to a composite broadband sound-absorbing and heat-insulating board. Background technique [0002] With the development of society, people have higher and higher requirements for the thermal insulation and sound absorption performance of building materials, especially the requirements for thermal insulation and sound absorption materials for indoor use are more stringent. Both cheap, beautiful, fireproof, moistureproof, dustproof, aging resistance and many other issues. Therefore it is imminent to develop a kind of high-performance and cheap thermal insulation and sound-absorbing panels. [0003] The Chinese patent with the patent number ZL 200520040761.6 announced the design idea of ​​a perforated composite decorative sound-absorbing panel, which solves the problems of light weight and waterproof, but the sound absorption effect for low and intermediate frequencies is ...

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent with the patent number ZL 200520040761.6 announced the design idea of ​​a perforated composite decorative sound-absorbing panel, which solves the problems of light weight and waterproof, but the sound absorption effect for low and intermediate frequencies is not very good, and it cannot meet the requirements of broadband Sound absorption requirements

And if the perforated material is placed on the outer layer, indoor dust can easily enter the holes, which requires frequent cleaning, which is very inconvenient

[0004] The Chinese patent No. 201180034456.4 introduces a sheet for thermal insulation and sound-absorbing materials, which solves the problem of light weight and broadband sound absorption, but the process is too complicated, and the acrylic gel obtained by gelling the porous gel It is difficult to control the attachment form and number on the surface of the porous substrate. If the attachment form and number of the gel are to be well controlled, the production cost is too high

[0005] The traditional perforated sound-absorbing panels have a certain selectivity to the sound frequency, and the sound-absorbing frequency characteristic curve is peak-shaped. When the sound frequency is close to the resonance frequency, the sound absorption coefficient is large; when the sound frequency is far away from the resonance frequency, the sound absorption coefficient is small. In this way, it cannot meet the needs of daily life to absorb the complex and changeable characteristics of sound frequencies, nor can it meet the characteristics of heat preservation.

A single glass fiber mat cannot meet the requirements for absorbing mid-frequency and low-frequency sound waves. Although the absorption of low-frequency and mid-frequency waves can be increased by increasing the thickness, the effect is not very good, and the appearance will also be affected by the thickness. and increased costs

Images