CN-224210739-U - Phenolic foam acoustic baffle

Abstract

The utility model relates to the technical field of sound insulation plates, in particular to a phenolic foam sound insulation plate. The structure sequentially comprises a surface layer sound absorbing layer, a first reinforcing layer, a main sound insulating layer, a second reinforcing layer, a fireproof layer and a bottom layer reflecting layer from top to bottom, wherein the surface layer sound absorbing layer is made of open-cell phenolic foam, hemispherical grooves are formed in the surface of the surface layer sound absorbing layer, the main sound insulating layer is made of closed-cell phenolic foam, the first reinforcing layer and the second reinforcing layer are made of glass fiber mesh cloth and are respectively embedded into the upper surface and the lower surface of the main sound insulating layer, the fireproof layer is made of nano aluminum hydroxide coating and coated on one side, far away from the main sound insulating layer, of the second reinforcing layer, the bottom layer reflecting layer is made of aluminum foil film and covers one side, far away from the main sound insulating layer, of the fireproof layer. Through the design of the multi-layer composite structure, the sound insulation performance, the strength and the fireproof performance of the sound insulation plate are effectively improved, and a sound absorption-blocking-reflection multiple noise reduction mechanism is formed, so that the sound insulation plate can be widely applied to building and industrial scenes and has both environmental protection and economy.

Inventors

• JI CHAO
• HUANG JINDENG
• LIN BINHUA
• LI YAZHE

Assignees

• 福建天利高新材料有限公司

Dates

Publication Date

20260508

Application Date

20250416

Claims (9)

1. 1. A phenolic foam sound insulation board is characterized by sequentially comprising a surface sound absorption layer, a first reinforcing layer, a main sound insulation layer, a second reinforcing layer, a fireproof layer and a bottom reflecting layer from top to bottom; the surface sound absorbing layer adopts open-cell phenolic foam, and the surface of the surface sound absorbing layer is provided with hemispherical grooves; The main sound insulation layer adopts closed-pore phenolic foam; the first reinforcing layer and the second reinforcing layer are made of glass fiber mesh cloth and are respectively embedded into the upper surface and the lower surface of the main sound insulation layer; The fireproof layer is coated on one side of the second reinforcing layer far away from the main sound insulation layer by adopting a nano aluminum hydroxide coating; The bottom reflecting layer adopts an aluminum foil film and covers one side of the fireproof layer far away from the main sound insulation layer.
2. 2. The phenolic foam acoustic panel of claim 1 wherein the hemispherical recesses are regularly distributed on the surface of the sound absorbing layer and have a diameter of 4-6mm and a depth of 2-3mm.
3. 3. The phenolic foam acoustic panel of claim 1 wherein the primary acoustic layer has ceramic microbead particles dispersed therein.
4. 4. The phenolic foam acoustic panel of claim 3 wherein the ceramic microbead particles have a particle size of 0.5-2mm.
5. 5. The phenolic foam acoustic panel of claim 1 wherein the closed cell phenolic foam has a density of 60-80kg/m 3 and a thermal conductivity of 0.025W/(m.K).
6. 6. The phenolic foam acoustic panel of claim 1 wherein the side surfaces of the first and second reinforcing layers remote from the primary acoustic layer are coated with a modified epoxy resin.
7. 7. The phenolic foam acoustic panel of claim 1 wherein the top acoustic layer has a thickness of 3-5mm, the primary acoustic layer has a thickness of 15-25mm, and the bottom reflective layer has a thickness of 0.1-0.3mm.
8. 8. The phenolic foam acoustic panel of claim 1 wherein the phenolic foam acoustic panel has an edge connection at its peripheral edge, the edge connection comprising male and female portions that wedge against one another.
9. 9. The phenolic foam acoustic panel of claim 8 wherein the cross-section of the protrusions and recesses is one of trapezoidal, rectangular, triangular and stepped.

Description

Phenolic foam acoustic baffle Technical Field The utility model relates to the technical field of sound insulation materials, in particular to a phenolic foam sound insulation board. Background With the increasing demand for sound insulation in the construction and industry, the use of traditional sound insulation materials such as rock wool, glass wool and polyurethane foam has increasingly revealed significant drawbacks. Although the materials meet the basic sound insulation requirement to a certain extent, the absorption effect of the materials on low-frequency noise is generally poor, and the materials are difficult to cope with diversified noise interference in a complex acoustic environment. In addition, the inflammable characteristic of part of materials causes that the fireproof performance is difficult to reach the standard, for example, polyurethane foam easily releases toxic gas when burning, has potential safety hazards, and limits the use of the polyurethane foam in strict scenes of fireproof requirements. Stability problems for long term use also become bottlenecks in conventional materials. Part of sound insulation materials are easy to age or attenuate in performance due to strong hygroscopicity and are easily influenced by environmental humidity, so that the sound insulation effect is obviously reduced along with the prolonged service time. In terms of environmental protection, part of materials may release harmful substances in the production or use process, which not only causes burden to the environment, but also may cause potential threat to human health. In recent years, phenolic foam has received attention for its excellent flame retardancy and low smoke toxicity, but the prior art solutions employing phenolic foam panels directly have significant drawbacks. The single phenolic foam layer structure is difficult to realize high-efficiency absorption of wide-frequency noise, has low mechanical strength and insufficient compression resistance and bending resistance, and is easy to deform or damage under complex working conditions. The structural design of the existing product lacks the targeted optimization of sound wave reflection and scattering, and further limits the improvement space of sound insulation performance. In view of the above problems, a new composite-structure sound insulation material having high sound insulation performance, excellent fire resistance, stable mechanical strength and environmental protection characteristics is needed by those skilled in the art to meet the current practical application demands. Disclosure of utility model In order to overcome the defects of the prior art, the phenolic foam acoustic panel provided by the utility model sequentially comprises a surface acoustic layer, a first reinforcing layer, a main acoustic layer, a second reinforcing layer, a fireproof layer and a bottom reflecting layer from top to bottom; the surface sound absorbing layer adopts open-cell phenolic foam, and the surface of the surface sound absorbing layer is provided with hemispherical grooves; The main sound insulation layer adopts closed-pore phenolic foam; the first reinforcing layer and the second reinforcing layer are made of glass fiber mesh cloth and are respectively embedded into the upper surface and the lower surface of the main sound insulation layer; The fireproof layer is coated on one side of the second reinforcing layer far away from the main sound insulation layer by adopting a nano aluminum hydroxide coating; The bottom reflecting layer adopts an aluminum foil film and covers one side of the fireproof layer far away from the main sound insulation layer. On the basis of the scheme, the hemispherical grooves are regularly distributed on the surface of the surface sound absorption layer, the diameter is 4-6mm, and the depth is 2-3mm. On the basis of the scheme, further, ceramic microbead particles are dispersed in the main sound insulation layer. Based on the scheme, the volume of the ceramic microbead particles accounts for 5% -8% of the volume of the main sound insulation layer. On the basis of the scheme, further, the particle size of the ceramic microbeads is 0.5-2mm. Based on the scheme, further, the density of the closed-cell phenolic foam is 60-80kg/m 3, and the heat conductivity coefficient is less than or equal to 0.025W/(m.K). On the basis of the scheme, further, the surface of one side of the first reinforcing layer and the second reinforcing layer, which is far away from the main sound insulation layer, is coated with modified epoxy resin. On the basis of the scheme, the thickness of the surface sound absorbing layer is 3-5mm, the thickness of the main sound insulating layer is 15-25mm, and the thickness of the bottom reflecting layer is 0.1-0.3mm. On the basis of the scheme, the outer peripheral edge of the phenolic foam sound insulation plate is provided with an edge connecting structure, and the edge connecting structure comprises a convex