Sound insulation cotton for automobile

By designing a combination structure of protective sleeves, connectors, and fasteners on automotive sound insulation cotton, the problem of inconvenient installation of sound insulation cotton is solved, achieving a stable connection and flexible adaptation to the installation needs of different vehicle models, thus improving installation efficiency and stability.

CN223508215UActive Publication Date: 2025-11-04ZHEJIANG JINLING AUTO ACCESSORIES CO LTD
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Patent Information

Application Number
CN202423020135.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-09
Publication Date
2025-11-04
Estimated Expiration
2034-12-09

AI Technical Summary

Technical Problem

Existing automotive sound insulation materials lack a fixed structure, making installation inconvenient and difficult to securely connect to the vehicle, resulting in insufficient applicability and versatility.

Method used

An installation structure including a protective sleeve, connectors, and fasteners was designed. The connectors are equipped with replaceable mating interfaces, and the fasteners achieve stable installation through the cooperation of the rod and the pressure plate. The rod is equipped with an outer ring and a spring to provide pre-tightening force to enhance the fixing effect.

Benefits of technology

It enables simple and quick installation of sound insulation cotton, prevents displacement, improves applicability and versatility, and allows for flexible adjustments to meet the needs of different vehicle models and installation requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of sound insulation cotton, and particularly relates to sound insulation cotton for an automobile. The installation structure is used for assisting in installation of the sound insulation cotton and comprises protection sleeves arranged at the four corners of a sound insulation cotton body; the connecting piece is arranged on the protective sleeve and is used for connecting the protective sleeve with the automobile; the fastening piece is arranged on the protective sleeve and used for fixing the sound insulation cotton body, and the fastening piece is connected with the connecting piece; wherein the connecting piece is provided with a butt-joint opening, the automobile is provided with a butt-joint head matched with the butt-joint opening, and the butt-joint opening is of a replaceable structure. The sound insulation cotton has the beneficial effects that through the standardized design of the connecting pieces and the fastening pieces, the installation process of the sound insulation cotton body is simpler, more convenient and quicker. And through combined use of the protective sleeve, the connecting piece and the fastening piece, the sound insulation cotton body is fixed, and the sound insulation cotton body is effectively prevented from moving in the automobile.
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Description

Technical Field

[0001] This application belongs to the field of sound insulation cotton technology, and particularly relates to a sound insulation cotton for automobiles. Background Technology

[0002] Sound insulation cotton has a good heat insulation effect. After being pasted inside the car hood, it can effectively prevent the high temperature of the engine from being directly transmitted to the hood, thereby protecting the paint on the hood surface and preventing the hood from fogging up and affecting visibility in rainy weather.

[0003] Patent CN216579611 U discloses an easy-to-install and fix automotive sound insulation cotton, including a base material layer and a sound insulation cotton body. A fireproof layer is fixedly connected to one outer wall of the base material layer. A sound-absorbing hole is provided on the outer wall of the fireproof layer away from the base material layer. An antibacterial layer is provided on the side of the sound-absorbing hole away from the fireproof layer. A corrosion-resistant layer is fixedly connected to the outer wall of the antibacterial layer away from the sound-absorbing hole.

[0004] Although the aforementioned patent describes it as "car sound insulation cotton that is easy to install and fix," the sound insulation cotton lacks a corresponding fixing structure, making it inconvenient to match with cars and requiring improvement. Utility Model Content

[0005] The purpose of this application is to provide a sound insulation cotton for automobiles that can solve the above-mentioned problems.

[0006] The purpose of this application is to provide a sound insulation cotton for automobiles, comprising:

[0007] The sound insulation cotton itself;

[0008] An installation structure is provided to assist in the installation of sound insulation cotton. The installation structure includes:

[0009] Protective covers are installed at the four corners of the sound insulation cotton body;

[0010] A connector, provided on the protective cover and used to connect the protective cover to the vehicle;

[0011] Fasteners are provided on the protective sleeve and used to fix the sound insulation cotton body, and the fasteners are connected to the connectors;

[0012] The connector is equipped with a mating interface, and the vehicle is equipped with a mating connector that is compatible with the mating interface. The mating interface is a replaceable structure.

[0013] The aforementioned automotive sound insulation cotton uses the cotton body as the primary sound insulation material to absorb and isolate noise from inside the vehicle. The mounting structure assists in the installation and fixation of the sound insulation cotton. Protective sleeves are placed at the four corners of the cotton body to protect it from damage and to facilitate the connection between the cotton body and the mounting structure. Connectors are located on the protective sleeves to connect the sleeves (and the cotton body) to the vehicle. These connectors have replaceable interfaces to adapt to different vehicle models or installation requirements. Fasteners, also located on the protective sleeves, secure the sleeves to the cotton body, forming a stable installation system.

[0014] The standardized connector and fastener design simplifies and speeds up the installation of the sound insulation cotton. The combination of the protective sleeve, connectors, and fasteners secures the sound insulation cotton, effectively preventing displacement within the vehicle. Furthermore, the replaceable interfaces on the connectors allow for flexible adjustments based on different vehicle models or installation requirements, enhancing the applicability and versatility of this invention.

[0015] Furthermore, the fastener includes:

[0016] The mounting slot is provided on the protective sleeve, and the mounting slot is provided with threaded holes;

[0017] The rod has one end passing through the mounting groove and the threaded hole, and the other end connecting to the connector. The rod is also provided with an external thread that matches the threaded hole.

[0018] The pressure plate is set at the bottom of the rod and contacts the sound insulation cotton body;

[0019] The process involves rotating the rod, causing the pressure plate to move down and press the sound insulation cotton body. The bottom of the sound insulation cotton body contacts the bottom of the inside of the protective sleeve, and the top of the sound insulation cotton body forms a pressing gap with the top of the inside of the protective sleeve.

[0020] The mounting slot is located on the protective sleeve, serving as the mounting base for the rod. The mounting slot has threaded holes for engaging with the external threads of the rod, allowing for both fixing and rotation of the rod. One end of the rod passes through the mounting slot and engages with the threaded hole, while the other end connects to the connector. The rod has external threads that mate with the threaded holes, allowing it to move up and down within the mounting slot by rotating the rod. A pressure plate is located at the bottom of the rod, directly contacting the sound insulation cotton body. When the rod rotates and moves downwards, the pressure plate moves accordingly, pressing down on the sound insulation cotton body to ensure its stability within the installation structure.

[0021] By rotating the rod and lowering the pressure plate, the fasteners securely fix the sound insulation cotton body within the protective sleeve, effectively preventing displacement during installation or use and improving the stability of the sound insulation cotton body. Due to the design of the rod and threaded holes, the fasteners can be flexibly adjusted according to the thickness of the sound insulation cotton body and installation requirements. Rotating the rod easily achieves a tight contact between the pressure plate and the sound insulation cotton body, ensuring the stability and reliability of the installation.

[0022] Furthermore: the fastener also includes:

[0023] The outer ring is set on the outer wall of the rod.

[0024] A spring is positioned between the outer ring and the mounting groove;

[0025] The spring is sleeved outside the rod.

[0026] An outer ring is mounted on the outer wall of the rod, and a spring is positioned between the outer ring and the mounting groove, sleeved on the outside of the rod. This spring provides preload, enhancing the fixation of the sound insulation cotton. When the rod rotates, the spring's preload helps the pressure plate more tightly press against the sound insulation cotton, reducing loosening and displacement during installation and improving the installation accuracy and stability of the sound insulation cotton. Simultaneously, the presence of the spring provides greater flexibility in securing the sound insulation cotton. By adjusting the degree of rotation of the rod, the pressure of the pressure plate on the sound insulation cotton can be precisely controlled to meet different installation requirements.

[0027] Furthermore, a protective pad is provided at the bottom of the pressure plate.

[0028] The protective pad is located at the bottom of the pressure plate and comes into direct contact with the sound insulation cotton body. It is made of a soft, wear-resistant, and highly elastic material, such as rubber, silicone, or foam plastic, to ensure that the surface of the sound insulation cotton body is not damaged while being compressed. This allows for more even and stable contact between the pressure plate and the sound insulation cotton body, and also protects the sound insulation cotton with the base fabric.

[0029] Furthermore, the sound insulation cotton body includes:

[0030] Substrate layer;

[0031] An environmentally friendly cotton layer is disposed on the upper surface of the substrate layer, and an aluminum foil metal film is disposed on the surface of the environmentally friendly cotton layer.

[0032] A wear-resistant layer is applied to the upper surface of the aluminum foil metal film;

[0033] The substrate layer also has a heat insulation layer on its bottom surface.

[0034] The base layer, serving as the foundation structure of the sound insulation cotton, is made of durable materials, such as polyester fiber, glass fiber, or special synthetic materials, to ensure the stability and durability of the sound insulation cotton. The environmentally friendly cotton layer, located on the upper surface of the base layer, is the main sound insulation material of the sound insulation cotton. Made from environmentally friendly materials such as recycled fibers, plant fibers, or inorganic fibers, it possesses excellent sound insulation and sound absorption properties. Its surface is covered with an aluminum foil metal film, which reflects sound and heat, further enhancing sound and heat insulation effects. The wear-resistant layer, located on the upper surface of the aluminum foil metal film, protects the sound insulation cotton from environmental damage. It is made of wear-resistant and scratch-resistant materials, such as polyurethane, PVC, or special synthetic rubber, to ensure the sound insulation cotton remains intact during long-term use. The heat insulation layer, located on the lower surface of the base layer, isolates heat transfer and improves the heat insulation performance of the sound insulation cotton, and is made of heat-insulating materials.

[0035] Furthermore, a tensile-resistant mesh is provided between the substrate layer and the environmentally friendly cotton layer, and the tensile-resistant mesh is made of nylon filaments woven together.

[0036] The tensile strength mesh, woven from nylon filaments, is placed between the base material layer and the environmentally friendly cotton layer. It enhances the tensile strength and stability of the sound insulation cotton, preventing deformation or damage during installation or use. The nylon filaments possess high strength, abrasion resistance, and corrosion resistance, ensuring the tensile strength mesh maintains stable performance over long-term use.

[0037] The beneficial effects of this application are:

[0038] 1. The standardized connector and fastener design makes the installation of the sound insulation cotton body simpler and faster. The combination of protective sleeves, connectors, and fasteners provides a secure hold for the sound insulation cotton body, effectively preventing it from shifting inside the vehicle;

[0039] 2. The connector is a replaceable structure, which can be flexibly adjusted according to different vehicle models or installation requirements, thus improving the applicability and versatility of this utility model;

[0040] 3. An outer ring is set on the outer wall of the rod, and a spring is set between the outer ring and the mounting groove, sleeved on the outside of the rod, to provide pre-tightening force, thereby enhancing the fixing effect of the sound insulation cotton body. When the rod rotates, the pre-tightening force of the spring can help the pressure plate to press the sound insulation cotton body more tightly, and also help to reduce loosening and displacement during installation, improving the installation accuracy and stability of the sound insulation cotton body. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of this utility model;

[0042] Figure 2 This is a cross-sectional view of the present invention;

[0043] Figure 3 yes Figure 2 Enlarged view of A in the middle;

[0044] Figure 4 This is a structural schematic diagram of the sound insulation cotton body of this utility model.

[0045] The attached figures are labeled as follows: 100, sound insulation cotton body; 110, substrate layer; 120, environmentally friendly cotton layer; 130, aluminum foil metal film; 140, wear-resistant layer; 150, heat insulation layer; 160, tensile strength mesh; 200, installation structure; 210, protective sleeve; 220, connector; 221, mating interface; 230, fastener; 231, mounting groove; 232, threaded hole; 233, rod; 234, pressure plate; 235, outer ring; 236, spring; 237, protective pad. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0047] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] The automotive sound insulation cotton provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0049] Example 1:

[0050] like Figures 1 to 3 As shown in the figure, this application provides a sound insulation cotton for automobiles, comprising:

[0051] Sound insulation cotton body 100;

[0052] Mounting structure 200 is used to assist in the installation of sound insulation cotton. Mounting structure 200 includes:

[0053] Protective covers 210 are placed at the four corners of the sound insulation cotton body 100;

[0054] Connector 220 is disposed on protective sleeve 210 and used to connect protective sleeve 210 to vehicle;

[0055] Fastener 230 is provided on protective sleeve 210 and used to fix sound insulation cotton body 100, and fastener 230 is connected to connector 220;

[0056] The connector 220 is provided with a mating interface 221, and the vehicle is provided with a mating connector adapted to the mating interface 221, and the mating interface 221 is a replaceable structure.

[0057] In some embodiments of this application, such as Figure 1 As shown, the aforementioned automotive sound insulation cotton uses a sound insulation cotton body 100 as the main sound insulation material to absorb and isolate noise inside the vehicle. The mounting structure 200 assists in the installation and fixation of the sound insulation cotton. Protective sleeves 210 are located at the four corners of the sound insulation cotton body 100, protecting it from damage and facilitating the connection between the sound insulation cotton body 100 and the mounting structure 200. Connectors 220 are located on the protective sleeves 210 to connect the protective sleeves 210 (and the sound insulation cotton body 100) to the vehicle. The connectors 220 have a mating interface 221, which is replaceable to adapt to different vehicle models or installation requirements. Fasteners 230 are also located on the protective sleeves 210 to secure the protective sleeves 210 to the sound insulation cotton body 100, forming a stable installation system.

[0058] The standardized design of the connectors 220 and fasteners 230 simplifies and speeds up the installation of the sound insulation cotton body 100. The combined use of the protective sleeve 210, connectors 220, and fasteners 230 provides a secure hold for the sound insulation cotton body 100, effectively preventing displacement within the vehicle. Furthermore, the interface 221 on the connector 220 is replaceable, allowing for flexible adjustments based on different vehicle models or installation requirements, thus improving the applicability and versatility of this invention.

[0059] Example 2:

[0060] This application provides a sound insulation cotton for automobiles. In addition to the above-mentioned technical features, the sound insulation cotton for automobiles in this application also includes the following technical features.

[0061] like Figure 2 and Figure 3 As shown, fastener 230 includes:

[0062] Mounting slot 231 is provided on protective sleeve 210, and threaded hole 232 is provided on mounting slot 231;

[0063] The rod 233 has one end passing through the mounting groove 231 and the threaded hole 232, and the other end being connected to the connector 220. The rod 233 is provided with an external thread that is compatible with the threaded hole 232.

[0064] Pressure plate 234 is set at the bottom of rod 233 and contacts sound insulation cotton body 100;

[0065] As the rod 233 rotates, the pressure plate 234 moves down and presses the sound insulation cotton body 100. The bottom of the sound insulation cotton body 100 contacts the bottom inside the protective sleeve 210, and the top of the sound insulation cotton body 100 forms a pressing gap with the top inside the protective sleeve 210.

[0066] In this embodiment, the mounting groove 231 is disposed on the protective sleeve 210, serving as the mounting base for the rod 233. The mounting groove 231 has a threaded hole 232 for engaging with the external thread of the rod 233, enabling the rod 233 to be fixed and rotated. One end of the rod 233 passes through the mounting groove 231 and engages with the threaded hole 232, while the other end connects to the connector 220. The rod 233 has an external thread adapted to the threaded hole 232, allowing it to move up and down within the mounting groove 231 by rotating it. A pressure plate 234 is disposed at the bottom of the rod 233, directly contacting the sound insulation cotton body 100. When the rod 233 rotates and moves downward, the pressure plate 234 moves accordingly and presses against the sound insulation cotton body 100, ensuring the stability of the sound insulation cotton body 100 within the mounting structure 200.

[0067] By rotating the rod 233 and lowering the pressure plate 234, the fastener 230 securely fixes the sound insulation cotton body 100 within the protective sleeve 210, effectively preventing displacement during installation or use and improving the stability of the sound insulation cotton body 100. Due to the design of the rod 233 and the threaded hole 232, the fastener 230 can be flexibly adjusted according to the thickness of the sound insulation cotton body 100 and installation requirements. By rotating the rod 233, a tight contact between the pressure plate 234 and the sound insulation cotton body 100 can be easily achieved, ensuring the stability and reliability of the installation effect.

[0068] Furthermore, a protective pad 237 is provided at the bottom of the pressure plate 234.

[0069] In some embodiments of this application, the protective pad 237 is disposed at the bottom of the pressure plate 234 and in direct contact with the sound insulation cotton body 100. It is made of a soft, wear-resistant, and highly elastic material, such as rubber, silicone, or foam plastic, to ensure that the surface of the sound insulation cotton body 100 is not damaged while being pressed tightly. This allows for more uniform and stable contact between the pressure plate 234 and the sound insulation cotton body 100, and also provides protection for the sound insulation cotton.

[0070] Example 3:

[0071] This application provides a sound insulation cotton for automobiles. In addition to the above-mentioned technical features, the sound insulation cotton for automobiles in this application also includes the following technical features.

[0072] like Figure 3 As shown, fastener 230 also includes:

[0073] The outer ring 235 is disposed on the outer wall of the rod 233;

[0074] Spring 236 is disposed between outer ring 235 and mounting groove 231;

[0075] The spring 236 is sleeved on the outside of the rod 233.

[0076] In this embodiment, an outer ring 235 is disposed on the outer wall of the rod 233, and a spring 236 is disposed between the outer ring 235 and the mounting groove 231, sleeved on the outside of the rod 233, to provide preload force, thereby enhancing the fixing effect of the sound insulation cotton body 100. When the rod 233 rotates, the preload force of the spring 236 can assist the pressure plate 234 in pressing the sound insulation cotton body 100 more tightly, and also helps to reduce loosening and displacement during installation, improving the installation accuracy and stability of the sound insulation cotton body 100. At the same time, due to the presence of the spring 236, the fastener 230 has greater flexibility in fixing the sound insulation cotton body 100. By adjusting the degree of rotation of the rod 233, the pressing force of the pressure plate 234 on the sound insulation cotton body 100 can be precisely controlled to meet different installation requirements.

[0077] Example 4:

[0078] This application provides a sound insulation cotton for automobiles. In addition to the above-mentioned technical features, the sound insulation cotton for automobiles in this application also includes the following technical features.

[0079] like Figure 4 As shown, the sound insulation cotton body 100 includes:

[0080] Substrate layer 110;

[0081] An environmentally friendly cotton layer 120 is disposed on the upper surface of the substrate layer 110, and an aluminum foil metal film 130 is disposed on the surface of the environmentally friendly cotton layer 120.

[0082] A wear-resistant layer 140 is disposed on the upper surface of the aluminum foil metal film 130;

[0083] The substrate layer 110 also has a heat insulation layer 150 on its lower surface.

[0084] In this embodiment, the substrate layer 110 serves as the basic structure of the sound-insulating cotton body 100 and is made of durable materials, such as polyester fiber, glass fiber, or special synthetic materials, to ensure the stability and durability of the sound-insulating cotton body 100. The environmentally friendly cotton layer 120 is disposed on the upper surface of the substrate layer 110 and is the main sound-insulating material of the sound-insulating cotton body 100. It is made of environmentally friendly materials, such as recycled fibers, plant fibers, or inorganic fibers, and has good sound insulation performance and sound absorption effect. An aluminum foil metal film 130 is disposed on its surface, which can reflect sound and heat, further improving the sound insulation and heat insulation effect. The wear-resistant layer 140 is disposed on the upper surface of the aluminum foil metal film 130 to protect the sound-insulating cotton body 100 from damage by the external environment. It is made of wear-resistant and scratch-resistant materials, such as polyurethane, PVC, or special synthetic rubber, to ensure that the sound-insulating cotton body 100 remains intact during long-term use. The heat insulation layer 150 is disposed on the lower surface of the substrate layer 110 to isolate heat transfer and improve the heat insulation performance of the sound insulation cotton body 100, and is made of heat insulation material.

[0085] Furthermore, a tensile mesh 160 is provided between the substrate layer 110 and the environmentally friendly cotton layer 120. The tensile mesh 160 is made of nylon filaments woven together.

[0086] In some embodiments of this application, a tensile mesh 160 is disposed between the substrate layer 110 and the environmentally friendly cotton layer 120, and is woven from nylon filaments. This enhances the tensile strength and stability of the sound insulation cotton body 100, preventing deformation or damage during installation or use. The nylon filaments possess high strength, wear resistance, and corrosion resistance, ensuring that the tensile mesh 160 maintains stable performance during long-term use.

[0087] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0088] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A type of sound insulation cotton for automobiles, characterized in that: include: Sound insulation cotton body (100); An installation structure (200) is used to assist in the installation of sound insulation cotton, the installation structure (200) comprising: Protective covers (210) are installed at the four corners of the sound insulation cotton body (100); A connector (220) is disposed on the protective sleeve (210) and is used to connect the protective sleeve (210) to the vehicle; Fastener (230) is provided on protective sleeve (210) and used to fix sound insulation cotton body (100), and fastener (230) is connected to connector (220); The connector (220) is provided with a mating interface (221), and the vehicle is provided with a mating connector adapted to the mating interface (221), and the mating interface (221) is a replaceable structure.

2. The automotive sound insulation cotton according to claim 1, characterized in that: The fastener (230) includes: A mounting slot (231) is provided on the protective sleeve (210), and a threaded hole (232) is provided on the mounting slot (231); The rod (233) has one end passing through the mounting groove (231) and the threaded hole (232), and the other end being connected to the connector (220). The rod (233) is provided with an external thread that is compatible with the threaded hole (232). A pressure plate (234) is provided at the bottom of the rod (233) and contacts the sound insulation cotton body (100); As the rod (233) rotates, the pressure plate (234) moves down and presses the sound insulation cotton body (100). The bottom of the sound insulation cotton body (100) contacts the bottom inside the protective sleeve (210), and the top of the sound insulation cotton body (100) forms a pressing gap with the top inside the protective sleeve (210).

3. The automotive sound insulation cotton according to claim 2, characterized in that: The fastener (230) also includes: The outer ring (235) is disposed on the outer wall of the rod (233); A spring (236) is disposed between the outer ring (235) and the mounting groove (231); The spring (236) is sleeved on the outside of the rod (233).

4. The automotive sound insulation cotton according to claim 3, characterized in that: The bottom of the pressure plate (234) is provided with a protective pad (237).

5. The automotive sound insulation cotton according to claim 1, characterized in that: The sound insulation cotton body (100) includes: Substrate layer (110); An environmentally friendly cotton layer (120) is disposed on the upper surface of the substrate layer (110), and an aluminum foil metal film (130) is disposed on the surface of the environmentally friendly cotton layer (120); A wear-resistant layer (140) is disposed on the upper surface of the aluminum foil metal film (130); The substrate layer (110) is further provided with a heat insulation layer (150) on its lower surface.

6. The automotive sound insulation cotton according to claim 5, characterized in that: A tensile mesh (160) is also provided between the substrate layer (110) and the environmentally friendly cotton layer (120), and the tensile mesh (160) is made of nylon filaments woven together.

Citation Information

Patent Citations

  • Automobile sound insulation cotton convenient to install and fix

    CN216579611U