A foamed rubber with sound insulation and noise reduction functional layer
By using a multi-layer composite structure foamed rubber design, the problems of weak low-frequency sound insulation and insufficient noise reduction stability of foamed rubber are solved, achieving effective blocking and long-term stability of low-frequency and mid-to-high-frequency noise.
Patent Information
- Application Number
- CN202522666955.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-16
AI Technical Summary
Existing foamed rubber has a sound insulation range limited to mid-to-high frequencies, while low-frequency noise can easily penetrate it. Furthermore, the filler has poor compatibility with the rubber substrate, resulting in a rapid decline in sound insulation and noise reduction performance over time.
The material adopts a multi-layer composite structure, including a base layer, a first functional layer, and a second functional layer. The base layer is a natural rubber-styrene-butadiene rubber blended open-cell foam layer. The first functional layer is composed of a chlorinated butyl rubber-graphite and isoprene rubber-iron oxide powder composite layer. The second functional layer is composed of closed-cell silicone rubber and closed-cell styrene-butadiene rubber layers. The protective layer is composed of fluororubber and chloroprene rubber. The layers are bonded together to form a stable composite structure.
It effectively blocks low-frequency and mid-to-high-frequency noise, prevents filler from falling off, and ensures stable sound insulation and noise reduction performance, thus overcoming the limitations of traditional foamed rubber in sound insulation band and insufficient noise reduction stability.
Smart Images
Figure CN224940758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foamed rubber technology, specifically to a foamed rubber with a sound insulation and noise reduction functional layer. Background Technology
[0002] Foamed rubber is an elastic material with a porous structure. Due to its excellent elasticity, cushioning properties, and weather resistance, it is widely used in building decoration, automotive interiors, electronic device packaging, and appliance sealing. In practical applications, especially in scenarios such as automotive cabins, soundproof ceilings, and appliance casing sealing, the demand for sound insulation and noise reduction performance of materials is increasing.
[0003] Existing foamed rubbers are mostly made from a single rubber substrate, and their sound insulation and noise reduction capabilities rely solely on the weak adsorption and blocking effect of their porous structure on sound waves, which has significant drawbacks: First, the sound insulation band is limited, only able to weaken mid-to-high frequency sound waves to a certain extent, while the blocking ability of low frequency sound waves is extremely poor. Low frequency noise can easily penetrate the material and propagate, resulting in poor sound insulation performance. Second, the noise reduction stability is insufficient. Some foamed rubbers add additional sound insulation fillers to improve sound insulation performance, but the fillers have poor compatibility with the rubber substrate and are prone to detachment due to material aging and vibration friction during long-term use, causing the sound insulation and noise reduction performance to rapidly decline over time. Therefore, we propose a foamed rubber with a sound insulation and noise reduction functional layer. Utility Model Content
[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a foamed rubber with a sound insulation and noise reduction functional layer. This layer offers the advantage of sound insulation and noise reduction while solving the problem that existing foamed rubbers are mostly made from a single rubber substrate, and their sound insulation and noise reduction capabilities rely solely on the weak adsorption and blocking effect of their porous structure on sound waves, resulting in significant defects: First, the sound insulation band is limited, only effectively weakening mid-to-high frequency sound waves, with extremely poor blocking ability for low-frequency sound waves. Low-frequency noise easily penetrates the material and propagates, leading to poor sound insulation performance. Second, the noise reduction stability is insufficient. Some foamed rubbers add additional sound insulation fillers to improve sound insulation performance, but the fillers have poor compatibility with the rubber substrate, and are prone to detachment due to material aging and vibration friction during long-term use, causing the sound insulation and noise reduction performance to rapidly decline over time.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a foamed rubber with a sound insulation and noise reduction functional layer, comprising a foamed rubber body, the foamed rubber body comprising a base layer, a first functional layer bonded to the top of the base layer, the first functional layer comprising a chlorinated butyl rubber-graphite composite layer and an isoprene rubber-iron oxide powder composite layer, a second functional layer bonded to the top of the first functional layer, the second functional layer comprising a closed-cell silicone rubber layer and a closed-cell styrene-butadiene rubber layer.
[0006] Preferably, a protective layer is bonded to the top of the second functional layer, the protective layer comprising a fluororubber layer and a neoprene rubber layer, and an adhesive layer is provided at the bottom of the base layer.
[0007] Preferably, the base layer is a natural rubber-styrene-butadiene rubber blended open-cell foam layer, the chlorinated butyl rubber-graphite composite layer is bonded to the top of the base layer, and the isoprene rubber-iron oxide powder composite layer is bonded to the top of the chlorinated butyl rubber-graphite composite layer.
[0008] Preferably, the closed-cell silicone rubber layer is bonded to the top of the first functional layer, and the closed-cell styrene-butadiene rubber layer is bonded to the top of the closed-cell silicone rubber layer.
[0009] Preferably, the fluororubber layer is bonded to the top of the second functional layer, and the neoprene rubber layer is bonded to the top of the fluororubber layer.
[0010] Preferably, the adhesive layer is an acrylic pressure-sensitive adhesive layer, and the fluororubber layer and the neoprene rubber layer have the same thickness.
[0011] Compared with the prior art, this utility model provides a foamed rubber with a sound insulation and noise reduction functional layer, which has the following beneficial effects:
[0012] 1. The base layer of this utility model adopts a natural rubber-styrene-butadiene rubber blended open-cell foam layer. Its high open-cell ratio and honeycomb structure not only provide stable support and good buffering performance for the overall material, but also serve as a transition carrier for sound wave conduction. The first functional layer is composed of a chlorinated butyl rubber-graphite composite layer and an isoprene rubber-iron oxide powder composite layer from bottom to top. Chlorinated butyl rubber has high damping characteristics, and when combined with the sheet-like structure of graphite, it can dissipate low-frequency sound wave energy through material deformation. The upper isoprene rubber-iron oxide powder composite layer utilizes the properties of iron oxide powder... The high-density properties enhance the suppression of low-frequency vibrations and work synergistically with the underlying structure to provide double protection against low-frequency noise penetration, solving the problem of weak low-frequency sound insulation in traditional foamed rubber. The second functional layer is composed of a closed-cell silicone rubber layer and a closed-cell styrene-butadiene rubber layer. The closed-cell structure can effectively reflect mid-to-high frequency sound waves and prevent sound waves from penetrating the material. Among them, the closed-cell silicone rubber layer has outstanding low-temperature performance, and the closed-cell styrene-butadiene rubber layer has a uniform structure. The two work together to ensure stable blocking of mid-to-high frequency noise in different environments, making up for the performance limitations of a single closed-cell material.
[0013] 2. The protective layer of this utility model is composed of a fluororubber layer and a neoprene rubber layer. The two layers are of the same thickness and are tightly bonded. The fluororubber layer has the characteristics of high temperature resistance and strong weather resistance, which can resist the erosion of the internal functional layer by the external environment. The neoprene rubber layer has outstanding flame retardancy and tear resistance, which can prevent scratches on the material surface and structural damage. The double protection ensures the long-term stable operation of the internal sound insulation and noise reduction functional layer and avoids the decay of noise reduction performance due to material aging. The adhesive layer at the bottom of the base layer is an acrylic pressure-sensitive adhesive layer, which has strong initial adhesion and good aging resistance. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a cross-sectional view of the first functional layer of this utility model;
[0016] Figure 3 This is a cross-sectional view of the second functional layer of this utility model;
[0017] Figure 4 This is a cross-sectional view of the third functional layer of this utility model.
[0018] In the diagram: 1. Foamed rubber body; 11. Base layer; 12. First functional layer; 121. Chlorinated butyl rubber-graphite composite layer; 122. Isoprene rubber-iron oxide powder composite layer; 13. Second functional layer; 131. Closed-cell silicone rubber layer; 132. Closed-cell styrene-butadiene rubber layer; 14. Protective layer; 141. Fluororubber layer; 142. Chloroprene rubber layer; 15. Adhesive layer. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0021] Example 1:
[0022] Please see Figure 1 , Figure 2 and Figure 3As shown, this utility model provides a foamed rubber with a sound insulation and noise reduction functional layer, including a foamed rubber body 1, the foamed rubber body 1 including a base layer 11, a first functional layer 12 bonded to the top of the base layer 11, the first functional layer 12 including a chlorinated butyl rubber-graphite composite layer 121 and an isoprene rubber-iron oxide powder composite layer 122, a second functional layer 13 bonded to the top of the first functional layer 12, the second functional layer 13 including a closed-cell silicone rubber layer 131 and a closed-cell styrene-butadiene rubber layer 132, the base layer 11 being a natural rubber-styrene-butadiene rubber blended open-cell foamed layer, the chlorinated butyl rubber-graphite composite layer 121 bonded to the top of the base layer 11, the isoprene rubber-iron oxide powder composite layer 122 bonded to the top of the chlorinated butyl rubber-graphite composite layer 121, the closed-cell silicone rubber layer 131 bonded to the top of the first functional layer 12, and the closed-cell styrene-butadiene rubber layer 132 bonded to the top of the closed-cell silicone rubber layer 131.
[0023] The specific functions of this technical solution are as follows: The base layer 11 is a natural rubber-styrene-butadiene rubber blended open-cell foam layer. Its high open-cell ratio and honeycomb structure not only provide stable support and good buffering performance for the overall material, but also serve as a transitional carrier for sound wave conduction. The first functional layer 12 is composed of a chlorinated butyl rubber-graphite composite layer 121 and an isoprene rubber-iron oxide powder composite layer 122 from bottom to top. Chlorinated butyl rubber has high damping characteristics, and when combined with the sheet-like structure of graphite, it can dissipate low-frequency sound wave energy through material deformation. The upper isoprene rubber-iron oxide powder composite layer 122 utilizes iron oxide... The high density of the powder enhances the suppression of low-frequency vibrations and works synergistically with the underlying structure to provide double protection against low-frequency noise penetration, thus solving the problem of weak low-frequency sound insulation in traditional foamed rubber. The second functional layer 13 is composed of a closed-cell silicone rubber layer 131 and a closed-cell styrene-butadiene rubber layer 132. The closed-cell structure can effectively reflect mid-to-high frequency sound waves and prevent sound waves from penetrating the material. Among them, the closed-cell silicone rubber layer 131 has outstanding low-temperature performance, and the closed-cell styrene-butadiene rubber layer 132 has a uniform structure. The two work together to ensure stable blocking of mid-to-high frequency noise in different environments, making up for the performance limitations of a single closed-cell material.
[0024] Example 2:
[0025] Based on Embodiment 1, this utility model is as follows: Figure 1 and Figure 4 As shown, a protective layer 14 is bonded to the top of the second functional layer 13. The protective layer 14 includes a fluororubber layer 141 and a neoprene rubber layer 142. An adhesive layer 15 is provided at the bottom of the base layer 11. The adhesive layer 15 is an acrylic pressure-sensitive adhesive layer. The fluororubber layer 141 and the neoprene rubber layer 142 have the same thickness. The fluororubber layer 141 is bonded to the top of the second functional layer 13, and the neoprene rubber layer 142 is bonded to the top of the fluororubber layer 141.
[0026] The specific functions of this technical solution are as follows: The protective layer 14 is composed of a fluororubber layer 141 and a neoprene rubber layer 142. The two layers have the same thickness and are tightly bonded. The fluororubber layer 141 has the characteristics of high temperature resistance and strong weather resistance, which can resist the erosion of the internal functional layer by the external environment. The neoprene rubber layer 142 has outstanding flame retardancy and tear resistance, which can prevent scratches on the material surface and structural damage. The double protection ensures the long-term stable operation of the internal sound insulation and noise reduction functional layer and avoids the decay of noise reduction performance due to material aging. The adhesive layer 15 at the bottom of the base layer 11 is an acrylic pressure-sensitive adhesive layer, which has strong initial adhesion and good aging resistance.
[0027] Working principle: The base layer 11 is a natural rubber-styrene-butadiene rubber blended open-cell foam layer. Its high open-cell ratio and honeycomb structure not only provide stable support and good buffering performance for the overall material, but also serve as a transition carrier for sound wave conduction. The first functional layer 12 is composed of a chlorinated butyl rubber-graphite composite layer 121 and an isoprene rubber-iron oxide powder composite layer 122 from bottom to top. Chlorinated butyl rubber has high damping characteristics, and when combined with the sheet-like structure of graphite, it can dissipate low-frequency sound wave energy through material deformation. The upper isoprene rubber-iron oxide powder composite layer 122 utilizes the high damping properties of iron oxide powder. The enhanced density characteristics suppress low-frequency vibrations and work synergistically with the underlying structure to provide double protection against low-frequency noise penetration, solving the problem of weak low-frequency sound insulation in traditional foamed rubber. The second functional layer 13 is composed of a closed-cell silicone rubber layer 131 and a closed-cell styrene-butadiene rubber layer 132. The closed-cell structure can effectively reflect mid-to-high frequency sound waves and prevent sound waves from penetrating the material. Among them, the closed-cell silicone rubber layer 131 has outstanding low-temperature performance, and the closed-cell styrene-butadiene rubber layer 132 has a uniform structure. The two work together to ensure stable blocking of mid-to-high frequency noise in different environments, making up for the performance limitations of a single closed-cell material.
[0028] The protective layer 14 is composed of a fluororubber layer 141 and a neoprene rubber layer 142. The two layers are of the same thickness and are tightly bonded. The fluororubber layer 141 has the characteristics of high temperature resistance and strong weather resistance, which can resist the erosion of the internal functional layer by the external environment. The neoprene rubber layer 142 has outstanding flame retardancy and tear resistance, which can prevent scratches on the material surface and structural damage. The double protection ensures the long-term stable operation of the internal sound insulation and noise reduction functional layer and avoids the decay of noise reduction performance due to material aging. The adhesive layer 15 at the bottom of the base layer 11 is an acrylic pressure-sensitive adhesive layer, which has strong initial adhesion and good aging resistance.
[0029] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0030] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.
[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A foamed rubber having a soundproofing and noise reduction function layer, comprising a foamed rubber body (1), characterized in that: The foamed rubber body (1) includes a base layer (11), and a first functional layer (12) is bonded to the top of the base layer (11). The first functional layer (12) includes a chlorinated butyl rubber-graphite composite layer (121) and an isoprene rubber-iron oxide powder composite layer (122). A second functional layer (13) is bonded to the top of the first functional layer (12), and the second functional layer (13) includes a closed-cell silicone rubber layer (131) and a closed-cell styrene-butadiene rubber layer (132).
2. The foamed rubber with a soundproofing and noise reduction function layer according to claim 1, characterized in that: The top of the second functional layer (13) is bonded with a protective layer (14), which includes a fluororubber layer (141) and a neoprene rubber layer (142), and the bottom of the base layer (11) is provided with an adhesive layer (15).
3. The foamed rubber with a sound insulation and noise reduction functional layer according to claim 1, characterized in that: The base layer (11) is a natural rubber-styrene-butadiene rubber blended open-cell foam layer, the chlorinated butyl rubber-graphite composite layer (121) is bonded to the top of the base layer (11), and the isoprene rubber-iron oxide powder composite layer (122) is bonded to the top of the chlorinated butyl rubber-graphite composite layer (121).
4. The foamed rubber with a sound insulation and noise reduction functional layer according to claim 1, characterized in that: The closed-cell silicone rubber layer (131) is bonded to the top of the first functional layer (12), and the closed-cell styrene-butadiene rubber layer (132) is bonded to the top of the closed-cell silicone rubber layer (131).
5. The foamed rubber with a sound insulation and noise reduction functional layer according to claim 2, characterized in that: The fluororubber layer (141) is bonded to the top of the second functional layer (13), and the neoprene rubber layer (142) is bonded to the top of the fluororubber layer (141).
6. The foamed rubber with a sound insulation and noise reduction functional layer according to claim 2, characterized in that: The adhesive layer (15) is an acrylic pressure-sensitive adhesive layer, and the fluororubber layer (141) and the chloroprene rubber layer (142) have the same thickness.