A high-foaming resin soundproof panel of a multi-layer composite structure

Abstract

The utility model relates to the technical field of automobile parts, disclose a kind of high foaming resin soundproof board of multilayer composite structure, from top to bottom sequentially include functional structure assembly, main sound absorption structure assembly, sound insulation structure assembly and installation sealing structure assembly, the functional structure assembly includes the wear-resistant antifouling coating of uppermost end, the lower end of wear-resistant antifouling coating is sequentially provided with antibacterial layer, microfiber fabric layer and high-density microporous sound-absorbing membrane, the main sound absorption structure assembly includes the gradient pore size foaming layer in high-density microporous sound-absorbing membrane lower end, the lower end of gradient pore size foaming layer is sequentially provided with sandwich composite sound-absorbing layer and hollow glass microsphere. In the utility model, through the synergistic effect of high-density microporous sound-absorbing membrane in functional structure assembly and gradient pore size foaming layer in main sound absorption structure assembly, sandwich composite sound-absorbing layer can effectively absorb and consume the sound wave energy from medium-high frequency to medium-low frequency.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a multi-layer composite high-foaming resin soundproofing board. Background Technology

[0002] With the rapid development of the automotive industry and the increasing demands of consumers for driving experience, the NVH performance of vehicles has become an important indicator for measuring their quality. Among them, noise control inside the cabin is particularly critical. As a core component for controlling cabin noise, soundproof panels are widely used in engine compartments, driver's cabin floor, wheel covers, roofs and other parts.

[0003] Most existing materials use asphalt boards, rubber boards, or dense plastic boards. These materials mainly block sound transmission through their high density and mass effect, but their sound absorption performance is poor, especially for mid-to-low frequency noise. At the same time, these materials generally have problems such as large mass, which is not conducive to vehicle lightweighting, complex molding, and poor environmental performance.

[0004] Therefore, those skilled in the art have provided a multi-layer composite high-foaming resin soundproof board to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a multi-layered composite high-foaming resin soundproofing board. The top layer, consisting of a wear-resistant and stain-resistant coating and an antibacterial layer, ensures surface cleanliness and hygiene during long-term use. The lower installation sealing structure utilizes low-melting-point hot melt adhesive and foaming expansion sealant to achieve rapid and tight adhesion to the installation substrate, effectively eliminating sound bridging effects caused by installation gaps and ensuring the integrity of the overall sound insulation effect. Furthermore, the flame-retardant coating at the ends enhances the product's fire safety. By deeply integrating the core acoustic functions with key peripheral performance aspects such as protection, installation, and safety, the product not only boasts excellent performance but is also more durable, safer, and easier to install and apply.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A multi-layer composite high-foaming resin soundproof board, comprising, from top to bottom, a functional structural component, a main sound-absorbing structural component, a sound-insulating structural component, and an installation and sealing structural component. The functional structural component includes an uppermost wear-resistant and stain-resistant coating, below which are sequentially disposed an antibacterial layer, a microfiber fabric layer, and a high-density microporous sound-absorbing membrane. The main sound-absorbing structural component includes a gradient pore size foam layer below the high-density microporous sound-absorbing membrane, below which are sequentially disposed a sandwich composite sound-absorbing layer and hollow glass microspheres. The sound-insulating structural component includes a thermoplastic elastomer bonded to the lower end of the hollow glass microspheres, below which are sequentially disposed a butyl rubber layer and a metal polymer composite film. The installation and sealing structural component includes a low-melting-point hot melt adhesive coating bonded to the lower end of the metal polymer composite film, below which are sequentially disposed a foamed expansion sealant and a flame-retardant coating. Through the above technical solutions, the soundproof panel can provide a more comprehensive and efficient noise reduction effect than single-function materials when facing complex noise environments.

[0007] Furthermore, the wear-resistant and anti-fouling coating is a polyurethane coating reinforced with Teflon and nano-silica, the antibacterial layer is a water-based polyurethane coating containing silver ions and photocatalysts, and the high-density microporous sound-absorbing membrane is a polytetrafluoroethylene membrane or a high-density polyethylene membrane. Through the above technical solutions, the wear-resistant and anti-fouling coating can effectively prevent the penetration of liquids and oils, is easy to clean, and improves durability. The antibacterial layer can effectively inhibit the growth of bacteria and mold, reduce odors in the car, and meet health and environmental protection requirements. The high-density microporous sound-absorbing membrane allows sound waves to penetrate and has excellent waterproof and dustproof functions, protecting the underlying foam.

[0008] Furthermore, the sandwich composite sound-absorbing layer is made of a soft polyolefin upper layer and a rigid polyurethane lower layer. The above technical solution effectively creates an impedance gradient and broadens the effective sound absorption band through the sandwich composite sound-absorbing layer.

[0009] Furthermore, the mounting sealing structure assembly is a composite film of aluminum foil and PET or PE; The above technical solution, by installing a sealing structure component as a composite film of aluminum foil and PET or PE, can effectively enable the aluminum foil to provide effective sound wave reflection and heat reflection, while the polymer layer provides flexibility and adhesion.

[0010] Furthermore, the low-melting-point hot melt adhesive coating is a copolyamide or copolyester hot melt adhesive powder or web, the foaming expansion sealant is an epoxy or rubber-based expansion adhesive, and the flame-retardant coating is an impregnated or coated halogen-free flame retardant. The above technical solution utilizes a low-melting-point hot melt adhesive coating that melts during the baking process in the automotive painting workshop, firmly bonding to the car body steel panels to form a seamless connection and preventing new cavity resonance. The installation process is simple and highly automated. Furthermore, the added flame-retardant coating effectively enhances the overall structure's flame-retardant rating, meeting stringent automotive fire safety standards.

[0011] This utility model has the following beneficial effects: 1. The multi-layer composite high-foaming resin soundproofing board proposed in this utility model can effectively absorb and consume sound wave energy from mid-high frequency to mid-low frequency through the synergistic effect of the high-density microporous sound-absorbing membrane in the functional structural components and the gradient pore size foaming layer and sandwich composite sound-absorbing layer in the main sound-absorbing structural components. At the same time, the lower sound insulation structural components, especially the high surface density butyl rubber layer and metal polymer composite film, form a strong sound wave barrier, effectively blocking the transmission of sound. Through the layer-by-layer progressive and complementary design from sound absorption to sound insulation, the soundproofing board can provide a more comprehensive and efficient noise reduction effect than single-function materials when facing complex noise environments.

[0012] 2. This utility model proposes a multi-layer composite high-foaming resin soundproof board. The top layer of wear-resistant and stain-resistant coating and antibacterial layer ensures the surface cleanliness and hygiene of the material during long-term use. The lower installation sealing structure uses low-melting-point hot melt adhesive and foaming expansion sealant to achieve rapid and tight adhesion to the installation substrate, effectively eliminating the sound bridge effect caused by installation gaps and ensuring the integrity of the overall sound insulation effect. In addition, the flame-retardant coating at the end enhances the fire safety of the product. By deeply integrating the core acoustic function with key peripheral performance such as protection, installation, and safety, the product not only has excellent performance but is also more durable, safer, and easier to install and apply. Attached Figure Description

[0013] Figure 1 This is an axial cross-sectional view of a multi-layer composite high-foaming resin soundproofing board proposed in this utility model. Figure 2 This is a schematic diagram of the layers of a multi-layer composite high-foaming resin soundproof board proposed in this utility model.

[0014] Legend: 1. Functional structural components; 101. Wear-resistant and stain-resistant coating; 102. Antibacterial layer; 103. Microfiber fabric layer; 104. High-density microporous sound-absorbing membrane; 2. Main sound-absorbing structural components; 201. Gradient pore size foam layer; 202. Sandwich composite sound-absorbing layer; 203. Hollow glass microspheres; 3. Sound insulation structural components; 301. Thermoplastic elastomer; 302. Butyl rubber layer; 303. Metal polymer composite film; 4. Install sealing structure components; 401. Low melting point hot melt adhesive coating; 402. Foaming expansion sealant; 403. Flame retardant coating. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] One specific embodiment of this utility model is provided: A multi-layer composite high-foaming resin soundproof board includes, from top to bottom, a functional structural component 1, a main sound-absorbing structural component 2, a sound-insulating structural component 3, and an installation and sealing structural component 4. The functional structural component 1 includes an uppermost wear-resistant and anti-fouling coating 101. Below the wear-resistant and anti-fouling coating 101, an antibacterial layer 102, a microfiber fabric layer 103, and a high-density microporous sound-absorbing membrane 104 are sequentially arranged. The microfiber fabric layer 103 provides an aesthetically pleasing surface and also possesses certain sound absorption properties. The main sound-absorbing structural component 2 includes a gradient pore size foamed layer 201 below the high-density microporous sound-absorbing membrane 104. Below the gradient pore size foamed layer 201, a sandwich composite sound-absorbing layer 202 and hollow glass microspheres 203 are sequentially arranged. The gradient pore size foamed layer 201, achieved through supercritical foaming, multi-layer co-extrusion foaming, and other technologies, is no longer uniform. Instead of foaming, it has a gradient structure with gradually changing pore diameters from top to bottom or from one side to the other, making the pore diameter smaller near the sound source side to absorb high-frequency sound, and the pore diameter larger inside and at the bottom to absorb low-frequency sound. The sound insulation structure component 3 includes a thermoplastic elastomer 301 attached to the lower end of the hollow glass microspheres 203. The lower end of the thermoplastic elastomer 301 is sequentially provided with a butyl rubber layer 302 and a metal polymer composite film 303. The butyl rubber layer 302 has both high density and high damping characteristics, which can not only block sound, but also effectively suppress the vibration of the body steel plate and reduce noise from the source. The sealing structure component 4 includes a low melting point hot melt adhesive coating 401 attached to the lower end of the metal polymer composite film 303. The lower end of the low melting point hot melt adhesive coating 401 is sequentially provided with a foamed expansion sealant 402 and a flame retardant coating 403. This allows the soundproof panel to provide a more comprehensive and efficient noise reduction effect than single-function materials when facing complex noise environments.

[0017] The wear-resistant and stain-resistant coating 101 is a polyurethane coating reinforced with Teflon and nano-silica; the antibacterial layer 102 is a water-based polyurethane coating containing silver ions and photocatalysts; and the high-density microporous sound-absorbing membrane 104 is a polytetrafluoroethylene membrane or a high-density polyethylene membrane. The wear-resistant and stain-resistant coating 101 effectively prevents liquid and oil penetration, is easy to clean, and improves durability. The antibacterial layer 102 effectively inhibits the growth of bacteria and mold, reducing odors inside the vehicle and meeting health and environmental protection requirements. The high-density microporous sound-absorbing membrane 104 allows sound waves to penetrate while possessing excellent waterproof and dustproof functions, protecting the underlying foam. The sandwich composite sound-absorbing layer 202 consists of an upper layer of soft polyolefin and a lower layer of rigid polyurethane. The sandwich composite sound-absorbing layer 202 effectively creates a gradual impedance change, widening the effective sound absorption band. The sealing structure component 4 is made of aluminum foil. The composite film with PET or PE, through the installation of the sealing structure component 4, is a composite film of aluminum foil and PET or PE. This effectively allows the aluminum foil to provide effective sound and heat reflection, while the polymer layer provides flexibility and adhesion. The low-melting-point hot melt adhesive coating 401 is a copolyamide or copolyester hot melt adhesive powder or web, the foaming expansion sealant 402 is an epoxy or rubber-based expansion adhesive, and the flame-retardant coating 403 is an impregnated or coated halogen-free flame retardant. The low-melting-point hot melt adhesive coating 401 allows it to melt during the baking process in the automotive painting workshop, firmly bonding to the car body steel plate to form a seamless connection, avoiding the generation of new cavity resonance. The installation process is simple and highly automated. Furthermore, the flame-retardant coating 403 effectively improves the overall structure's flame-retardant rating, meeting the stringent fire safety standards for automobiles.

[0018] When ambient noise comes into contact with the surface of the soundproof panel, it first undergoes initial high-frequency absorption and surface treatment by the wear-resistant and anti-fouling coating 101, antibacterial layer 102, and microfiber fabric layer 103 in the functional structural component 1. After the sound waves pass through the high-density microporous sound-absorbing membrane 104, they enter the main sound-absorbing structural component 2. The gradient pore size foam layer 201 achieves gradual absorption from high frequency to low frequency. The sandwich composite sound-absorbing layer 202 and hollow glass microspheres 203 further broaden the sound absorption band. After the residual sound energy is transmitted to the sound insulation structural component 3, it is effectively blocked by the thermoplastic elastomer 301, high-damping butyl rubber layer 302, and metal polymer composite film 303 through mass effect and vibration suppression. Finally, the hot melt adhesive layer of the installation sealing structure is firmly bonded to the vehicle body, the foam sealant fills the gaps, and the flame-retardant coating 403 provides fire protection, thereby achieving efficient noise reduction throughout the entire process from sound absorption and sound insulation to sealing protection.

[0019] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0020] 2. Where there is no conflict, the embodiments of this disclosure and the features thereof can be combined with each other to obtain new embodiments. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The specific meaning of the above terms in this utility model shall be understood by those skilled in the art based on the specific circumstances. In addition, unless otherwise stated, "multiple" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation on this utility model; the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-layer composite high-foaming resin soundproofing board, comprising, from top to bottom, a functional structural component (1), a main sound-absorbing structural component (2), a sound-insulating structural component (3), and an installation and sealing structural component (4), characterized in that: The functional structural component (1) includes an uppermost wear-resistant and anti-fouling coating (101). Below the wear-resistant and anti-fouling coating (101) are sequentially arranged an antibacterial layer (102), a microfiber fabric layer (103), and a high-density microporous sound-absorbing membrane (104). The main sound-absorbing structural component (2) includes a gradient pore size foam layer (201) below the high-density microporous sound-absorbing membrane (104). Below the gradient pore size foam layer (201) are sequentially arranged a sandwich composite sound-absorbing layer (202) and hollow glass microspheres (203). The sound insulation structure... The component (3) includes a thermoplastic elastomer (301) bonded to the lower end of hollow glass microspheres (203). A butyl rubber layer (302) and a metal polymer composite film (303) are sequentially disposed at the lower end of the thermoplastic elastomer (301). The mounting and sealing structure component (4) includes a low melting point hot melt adhesive coating (401) bonded to the lower end of the metal polymer composite film (303). A foaming expansion sealant (402) and a flame retardant coating (403) are sequentially disposed at the lower end of the low melting point hot melt adhesive coating (401).

2. The multi-layer composite high-foaming resin soundproof board according to claim 1, characterized in that: The wear-resistant and anti-fouling coating (101) is a polyurethane coating reinforced with Teflon and nano-silica, the antibacterial layer (102) is a water-based polyurethane coating containing silver ions and photocatalyst, and the high-density microporous sound-absorbing membrane (104) is a polytetrafluoroethylene membrane or a high-density polyethylene membrane.

3. The multi-layer composite high-foaming resin soundproof board according to claim 1, characterized in that: The sandwich composite sound-absorbing layer (202) consists of an upper layer of soft polyolefin and a lower layer of rigid polyurethane.

4. The multi-layer composite high-foaming resin soundproof board according to claim 1, characterized in that: The mounting sealing structure component (4) is a composite film of aluminum foil and PET or PE.

5. The multi-layer composite high-foaming resin soundproofing board according to claim 1, characterized in that: The low-melting-point hot melt adhesive coating (401) is a copolyamide or copolyester hot melt adhesive powder or mesh, the foaming expansion sealant (402) is an epoxy or rubber-based expansion adhesive, and the flame-retardant coating (403) is an impregnated or coated halogen-free flame retardant.

Images