A multilayer, graded density laminated soundproof glass
By using a multi-layered gradient density laminated structure and silica microparticle filling design, the problem of poor low-frequency noise performance of existing soundproof glass is solved, achieving more efficient sound wave absorption and sound insulation while maintaining the strength and lightweight of the glass.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JUFENG GLASS CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-08-04
AI Technical Summary
Existing soundproof glass has a single layer of film with uniform density, and the energy attenuation path when sound waves penetrate is singular. It is particularly ineffective at insulating low-frequency noises such as car engine noise and also suffers from resonance problems.
The structure employs a multi-layered gradient density laminated structure, with the density of the PVB substrate increasing progressively from the outer glass layer to the inner glass layer. Silica microparticles are filled within the laminated layer to form acoustic impedance steps and irregular scattering surfaces, enabling multiple reflections and absorption of sound waves.
It significantly improves sound insulation performance, enhances the absorption capacity of sound waves of different frequencies, reduces sound penetration, and maintains the strength and stability of the glass without increasing weight.
Smart Images
Figure CN224588755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building sound insulation materials technology, and in particular to a multi-layer gradient density laminated sound insulation glass. Background Technology
[0002] Soundproof glass refers to glass with sound insulation properties. It is usually achieved by adding an internal interlayer. This type of glass is relatively heavy and can damage household hardware, so it is not suitable for home doors and windows. It is usually used in places with high sound insulation requirements, such as handrails, glass canopies, and soundproof windows on elevated roads.
[0003] Previously, soundproof glass mostly used a laminated structure of "glass + single-layer PVB film + glass". This structure absorbs some sound wave energy through the elasticity of the PVB film, but it has obvious drawbacks. The main bottleneck in sound insulation is that the single-layer film has a uniform density, and the energy attenuation path when sound waves penetrate is singular. It is particularly ineffective for low-frequency noise, such as car engine noise, and there is also a certain resonance problem. When the sound wave frequency is the same as the natural frequency of the film, resonance will occur, which will reduce the sound insulation effect. Utility Model Content
[0004] To address the problem that existing soundproof glass has a single layer of uniform interlayer film density, resulting in a single energy attenuation path during sound wave penetration, and particularly poor sound insulation for low-frequency noises such as car engine noise, this application provides a multi-layer gradient density laminated soundproof glass, the specific solution of which is as follows.
[0005] A multi-layer gradient density laminated soundproof glass includes an outer glass layer and an inner glass layer, wherein a gradient density laminated layer is disposed between the outer glass layer and the inner glass layer, and multiple layers of PVB substrates with different densities are disposed within the gradient density laminated layer, wherein the density of the PVB substrates increases progressively from the outer glass layer to the inner glass layer.
[0006] By adopting the above technical solutions, multi-layer gradient density laminated soundproof glass can effectively improve sound insulation performance. By setting a gradient density laminated layer between the outer and inner glass layers, and ensuring that the density of the PVB substrate increases progressively from the outer to the inner glass layers, gradual attenuation of sound waves at different frequencies can be achieved, thereby significantly improving the overall sound insulation effect.
[0007] Optionally, the density of the PVB substrate in each layer increases by 10% in increments.
[0008] By adopting the above technical solutions, the density of the PVB substrate in multi-layer gradient density laminated soundproof glass increases by 10% in stages, making the density change between adjacent layers more gradual and regular, which can form a sound wave impedance step, thereby effectively improving sound insulation performance and structural stability.
[0009] Optionally, the PVB substrate has three layers, with the PVB substrate closest to the outer glass layer having a density of 0.8 g / cm³. 3 The density of the PVB substrate near the inner glass layer is 1.2 g / cm³. 3 The density of the PVB substrate located in the middle is 1.0 g / cm³. 3 .
[0010] By adopting the above technical solution, this design causes multiple reflections and absorptions of sound waves as they propagate through PVB substrates of different densities, effectively reducing sound penetration and thus significantly improving sound insulation. Simultaneously, the rational density distribution optimizes the overall structural performance of the glass, ensuring that it maintains good strength and stability while possessing excellent sound insulation, without increasing its overall weight.
[0011] Optionally, the PVB substrate contains silica microparticles.
[0012] By adopting the above technical solution, filling the interior of the PVB substrate with silica microparticles can form an irregular scattering surface within the PVB substrate, allowing sound waves to undergo diffuse reflection within the PVB substrate, thereby converting energy into heat energy.
[0013] Optionally, the silica particles have a particle size greater than or equal to 10 micrometers and less than or equal to 50 micrometers.
[0014] By adopting the above technical solutions, the particle size of silica particles can be controlled between 10 micrometers and 50 micrometers. This ensures that the particle size meets the requirements for the formation of irregular scattering surfaces, while also reducing the possibility that excessively large particles may affect the original structure and performance of the PVB substrate.
[0015] Optionally, the thickness of both the inner and outer glass layers is 5 mm.
[0016] By adopting the above technical solution, both the inner and outer glass layers are set at 5mm, which makes the entire glass structure have a uniform strength distribution, improves the overall impact resistance, facilitates standardized production, and reduces manufacturing costs and process complexity.
[0017] Optionally, a heat insulation layer is provided between the inner glass and the gradient density laminate, and the heat insulation layer is made of a low thermal conductivity material.
[0018] By adopting the above technical solution, since the silica microparticles can form an irregular scattering surface to convert sound waves into heat energy, the heat insulation layer can reduce the temperature rise of the inner glass layer, thus reducing the overheating of the glass at the handrail railing.
[0019] Optionally, the heat insulation layer includes a silicon dioxide layer or a silicon nitride layer.
[0020] By adopting the above technical solutions, both silicon dioxide and silicon nitride have good heat insulation properties and are transparent materials, which can be applied as a film layer on the inner glass.
[0021] In summary, this application has at least the following beneficial effects: 1. This application solves the problem that in the prior art, the single-layer adhesive film of soundproof glass has a uniform density, and the energy attenuation path when sound waves penetrate is singular, resulting in poor sound insulation, especially for low-frequency noise such as car engine noise. This application solves the problem by setting a gradient density interlayer, which forms a sound wave impedance ladder through PVB substrates of different densities. Sound waves can be absorbed by the PVB substrates of corresponding densities, and sound waves of various frequency bands can be absorbed, thereby improving the sound insulation effect.
[0022] 2. This application also fills the PVB substrate with silica microparticles, which can form an irregular scattering surface in the PVB substrate, effectively converting sound waves into heat energy, thereby further improving the sound insulation effect. Attached Figure Description
[0023] Figure 1 This is a cross-sectional view of Embodiment 1.
[0024] Figure 2 This is a cross-sectional view of Embodiment 2.
[0025] Explanation of reference numerals in the attached figures: 1. Outer glass; 11. Moisture-sensing microcapsules; 2. Inner glass layer; 3. Gradient density interlayer; 31. PVB substrate; 311. Silica microparticles; 4. Insulation layer. Detailed Implementation
[0026] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] Example 1 A type of multi-layered gradient density laminated soundproof glass, such as Figure 1 As shown, the glass includes an outer glass layer 1 and an inner glass layer 2, with a gradient density interlayer 3 between them. The gradient density interlayer 3 contains multiple layers of PVB substrate 31 with varying densities, the density of which increases progressively from the outer glass layer 1 to the inner glass layer 2. In practice, both the inner glass layer 2 and the outer glass layer 1 are 5mm thick. The PVB substrate 31, or polyvinyl acetal, possesses excellent transparency, flexibility, weather resistance, and chemical stability. It can improve sound insulation by absorbing sound waves of different frequencies through varying densities, while also maintaining the transparency of the glass.
[0028] like Figure 1 As shown, the density of each layer of PVB substrate 31 increases progressively by 10%. The PVB substrate 31 consists of three layers, with the layer closest to the outer glass 1 having a density of 0.8 g / cm³. 3 The density of the PVB substrate 31 near the inner glass layer 2 is 1.2 g / cm³. 3 The density of the PVB substrate 31 located in the middle is 1.0 g / cm³. 3 In practice, the PVB substrate 31 is arranged in three layers to form a stepped acoustic impedance, which can absorb sound waves of different frequency bands, so that both low-frequency and high-frequency sound waves can be absorbed, thereby improving the sound insulation effect.
[0029] like Figure 1 As shown, silica particles 311 are disposed within the PVB substrate 31. The particle size of the silica particles 311 is greater than or equal to 10 micrometers and less than or equal to 50 micrometers. In specific implementation, silica is a transparent material, so it does not affect transparency. The silica particles 311 are irregularly distributed within the PVB substrate 31 and are incorporated during the solidification process of the PVB substrate 31. They can form irregular scattering surfaces within the PVB substrate 31, enabling diffuse reflection of sound waves within the PVB substrate 31, further converting sound waves into heat energy, and further absorbing sound waves, thereby improving the sound insulation effect.
[0030] like Figure 1 As shown, a heat insulation layer 4 is also provided between the inner glass layer 2 and the gradient density interlayer 3. The heat insulation layer 4 is made of a low thermal conductivity material. The heat insulation layer 4 includes a silicon dioxide layer or a silicon nitride layer. In specific implementation, since sound waves are converted into heat energy by silicon dioxide particles 311, the heat insulation layer 4 can effectively absorb heat and reduce overheating of the inner glass layer 2 that can be touched. Both silicon dioxide and silicon nitride are transparent materials with good heat insulation effects, thus improving the heat insulation effect while maintaining transparency.
[0031] Working principle: By setting PVB substrates 31 with different densities, sound waves of different frequencies can be absorbed, which can improve the sound insulation effect and enhance the sound insulation effect against low-frequency noise.
[0032] Example 2 The main difference between Example 2 and Example 1 is that the outer glass 1 and the inner glass 2 are filled with moisture-sensing microcapsules 11. In specific implementation, the moisture-sensing microcapsules 11 will only come into contact with external moisture and rainwater when the inner glass 2 or the outer glass 1 breaks. The material inside the moisture-sensing microcapsules 11 is a moisture-sensing material that changes color when it comes into contact with water. This kind of moisture-sensing material is widely used in color-changing clothing, water cups, etc. on the market. When the inner glass 2 or the outer glass 1 breaks, moisture will come into contact with the moisture-sensing material, causing the moisture-sensing material to change color partially. If there is rainy weather, the moisture-sensing material can play a clear indication role, and can also indicate the breakage of the glass.
[0033] Working principle: The basic working principle is the same as in Example 1, but a moisture-sensing material that can indicate the inner glass 2 and the outer glass 1 is added, so that the inner glass 2 and the outer glass 1 can be replaced in time when they are damaged.
[0034] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A multi-layer, graded density laminated glass, characterized in that: It includes an outer glass layer (1) and an inner glass layer (2), and a gradient density interlayer (3) is provided between the outer glass layer (1) and the inner glass layer (2). The gradient density interlayer (3) contains multiple layers of PVB substrates (31) with different densities, and the density of the PVB substrates (31) increases from the outer glass layer (1) to the inner glass layer (2).
2. The multi-layer, progressively-densified, laminated glass of claim 1, wherein: The density of the PVB substrate (31) in each layer increases by 10% in increments.
3. The multi-layer, progressively-densified, laminated glass of claim 2, wherein: The PVB substrate (31) has three layers. The PVB substrate (31) near the outer glass (1) has a density of 0.8 g / cm3, the PVB substrate (31) near the inner glass (2) has a density of 1.2 g / cm3, and the PVB substrate (31) in the middle has a density of 1.0 g / cm3.
4. The multi-layer, progressively-densified, laminated glass of claim 3, wherein: The thickness of both the inner glass layer (2) and the outer glass layer (1) is 5 mm.
5. The multi-layer, progressively-densified, laminated glass of claim 3, wherein: A heat insulation layer (4) is also provided between the inner glass (2) and the gradient density laminated layer (3), and the heat insulation layer (4) is made of a low thermal conductivity material.
6. The multi-layer, progressively-densified, laminated glass of claim 5, wherein: The heat insulation layer (4) includes a silicon dioxide layer or a silicon nitride layer.