Sound-absorbing and heat-insulating cotton board for engine compartment

Abstract

The utility model relates to the technical field of heat insulation cotton, in particular to a sound absorption and heat insulation cotton plate for an engine compartment, which comprises a heat insulation layer, a protective layer, a non-woven fabric layer and a bonding layer, the heat insulation layer is made of PET (polyethylene terephthalate) foam cotton, the non-woven fabric layer is bonded on one surface of the heat insulation layer through a hot bonding process, the protective layer is made of silicon rubber, and the bonding layer is bonded on the other surface of the heat insulation layer. The protective layer is adhered to one surface, far away from the heat insulation layer, of the non-woven fabric layer, and the adhesive layer is arranged on one surface, far away from the non-woven fabric layer, of the heat insulation layer. The protective layer made of silicon rubber is arranged, impact force can be absorbed when the heat insulation plate is collided or extruded by external objects, and the phenomenon that the heat insulation layer in the heat insulation cotton plate is damaged and broken to affect the heat insulation performance of the heat insulation cotton plate is avoided.

Description

Technical Field

[0001] This application relates to the technical field of heat-insulating cotton, and particularly relates to a sound-absorbing and heat-insulating cotton board for an engine compartment. Background Art

[0002] Generally speaking, cotton products that can achieve a heat-insulating effect are collectively referred to as heat-insulating cotton. Heat-insulating cotton has the characteristics of high temperature resistance, non-flammability, low thermal conductivity, etc. Currently, heat-insulating cotton widely used in industry is processed and produced using glass fiber as the material, such as fiberglass cotton and glass wool. Such products can be further processed by laminating aluminum foil and fiberglass cloth to make their uses more extensive. When an automobile engine is working, it will generate a large amount of heat, which will have an adverse impact on other components of the automobile. Therefore, heat-insulating cotton is often installed in the automobile engine compartment to reduce the impact of the heat generated by the engine on other components.

[0003] Currently, a Chinese utility model patent application with a publication date of March 18, 2022 and a publication number of CN216073673U provides a new type of engine heat-insulating gasket, including a heat-insulating gasket body. The heat-insulating gasket body is composed of a first protection mechanism, a second protection mechanism and an installation mechanism. The first protection mechanism, the second protection mechanism and the installation mechanism are arranged in sequence from front to back. The first protection mechanism includes an isolation layer and an anti-permeation layer. The isolation layer is a corrugated aluminum plate, and the anti-permeation layer is a waterproof blanket. The second protection mechanism includes a primary sound-insulating layer and a secondary sound-insulating layer. The primary sound-insulating layer is sound-insulating cotton, and the secondary sound-insulating layer is sound-insulating felt. The isolation layer being a corrugated aluminum plate can effectively resist the continuous combustion of an open flame, will not burn through and catch fire, and has high heat-insulating performance. In addition, the anti-permeation layer being a waterproof blanket has good waterproof and anti-seepage performance and sound-insulating effect, and is convenient to install.

[0004] In a new type of engine heat-insulating gasket in the related art, due to the low mechanical strength of the heat-insulating material and the sound-insulating material inside the heat-insulating gasket, during the production and transportation of the heat-insulating gasket, the heat-insulating gasket will be collided and squeezed by external objects, which may cause the heat-insulating material and the sound-insulating material to crack, resulting in the problem of performance degradation of the heat-insulating gasket. Summary of the Utility Model

[0005] The embodiments of this application provide a sound-absorbing and heat-insulating cotton board for an engine compartment, which can solve the technical problem that the internal materials of the heat-insulating gasket in the related art are easily damaged.

[0006] An embodiment of the present application provides a sound-absorbing and heat-insulating cotton board for an engine compartment, which includes a heat-insulating layer, a protective layer, a non-woven fabric layer, and an adhesive layer. The heat-insulating layer is made of PET foam cotton. The non-woven fabric layer is bonded to one side of the heat-insulating layer through a hot-bonding process. The protective layer is made of silicone rubber and is bonded to the side of the non-woven fabric layer away from the heat-insulating layer. The adhesive layer is arranged on the side of the heat-insulating layer away from the non-woven fabric layer.

[0007] In the above technical solution of the embodiment of the present application, it has at least the following technical effects: PET foam cotton has a porous internal structure and excellent heat-insulating performance, but its mechanical strength is low and it is easily damaged when subjected to external forces. The heat-insulating layer made of PET foam cotton will have a reduced heat-insulating performance after rupture. Silicone rubber has good mechanical strength and wear resistance. The protective layer made of silicone rubber can absorb part of the impact force when the heat-insulating cotton board is collided by an external object, thus protecting the heat-insulating layer and preventing the heat-insulating performance of the heat-insulating cotton board from decreasing due to the rupture of the heat-insulating layer caused by external forces. Silicone rubber also has excellent high-temperature resistance and can be used for a long time in the high-temperature environment inside the engine compartment.

[0008] The sound-absorbing and heat-insulating cotton board for an engine compartment provided by the embodiment of the present application is provided with a protective layer made of silicone rubber, which can absorb the impact force when the heat-insulating board is collided or squeezed by an external object, and prevent the heat-insulating layer inside the heat-insulating cotton board from being damaged and ruptured, affecting its heat-insulating performance.

[0009] In some embodiments, the adhesive layer includes an adhesive board, which is bonded to the side of the heat-insulating layer away from the non-woven fabric layer, and a high-temperature resistant glue is coated on the side of the adhesive board away from the heat-insulating layer.

[0010] In some embodiments, the adhesive layer further includes a release paper, which is bonded to the side of the adhesive board away from the heat-insulating layer.

[0011] In some embodiments, a sound-insulating layer is arranged between the heat-insulating layer and the adhesive board. The sound-insulating layer includes a sound-absorbing board made of glass fiber sound-absorbing cotton. One side of the sound-absorbing board is bonded to the heat-insulating layer, and the other side of the sound-absorbing board is bonded to the adhesive board.

[0012] In some embodiments, the sound-insulating layer further includes a sound-insulating felt, which is arranged between the sound-absorbing board and the adhesive board. One side of the sound-insulating felt is bonded to the sound-absorbing board, and the other side of the sound-insulating felt is bonded to the adhesive board.

[0013] In some embodiments, a corrugated aluminum foil is bonded to the side of the protective layer away from the heat-insulating layer. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for use in the embodiments or the description of the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0015] Figure 1 Schematic diagram of the overall structure of a sound-absorbing and heat-insulating cotton board for an engine compartment provided by an embodiment of the present application Figure 1 ;

[0016] Figure 2 For Figure 1 Enlarged view of part A.

[0017] Among them, the reference numerals in the figure:

[0018] 1, heat-insulating layer; 2, protective layer; 3, non-woven fabric layer; 4, adhesive layer; 41, adhesive plate; 42, release paper; 5, sound-insulating layer; 51, sound-absorbing board; 52, sound-insulating felt; 6, embossed aluminum foil. Detailed implementation manners

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above accompanying drawing descriptions are intended to cover non-exclusive inclusion.

[0021] Generally speaking, cotton products that can achieve heat-insulating effects are collectively referred to as heat-insulating cotton. Heat-insulating cotton has the characteristics of high temperature resistance, non-flammability, low thermal conductivity, etc. Currently, heat-insulating cotton widely used in industry is processed and produced using glass fiber as the material, such as glass fiber cotton and glass wool. Such products can be further processed by compounding with aluminum foil and glass fiber cloth to make their uses more extensive. When an automobile engine is working, it will generate a large amount of heat, which will have an adverse impact on other components of the automobile. Therefore, heat-insulating cotton is often installed in the automobile engine compartment to reduce the impact of the heat generated by the engine on other components.

[0022] A new type of engine heat insulation gasket in the related art, with the publication number CN216073673U, includes a heat insulation gasket body. The heat insulation gasket body is composed of a first protection mechanism, a second protection mechanism and an installation mechanism. The first protection mechanism, the second protection mechanism and the installation mechanism are arranged in sequence from front to back. The first protection mechanism includes an isolation layer and an anti-permeation layer. The isolation layer is a pressed flower aluminum plate, and the anti-permeation layer is a waterproof blanket. The second protection mechanism includes a primary sound insulation layer and a secondary sound insulation layer. The primary sound insulation layer is sound insulation cotton, and the secondary sound insulation layer is sound insulation felt. The isolation layer being a pressed flower aluminum plate can effectively resist the continuous combustion of an open flame, will not burn through and catch fire, and has high heat insulation performance. In addition, the anti-permeation layer being a waterproof blanket has good waterproof and anti-seepage performance and sound insulation effect, and is convenient for installation.

[0023] However, for a new type of engine heat insulation gasket in the related art, due to the low mechanical strength of the heat insulation material and the sound insulation material inside the heat insulation gasket, during the production and transportation of the heat insulation gasket, the heat insulation gasket will be collided and squeezed by external objects, which may cause the heat insulation material and the sound insulation material to break, resulting in the problem of the performance degradation of the heat insulation gasket.

[0024] Based on this, to improve the problem that the internal materials of the heat insulation gasket in the related art are easily damaged, the embodiments of the present application provide the following solutions.

[0025] Please refer to Figure 1 and Figure 2 simultaneously. The embodiments of the present application provide a sound-absorbing and heat-insulating cotton board for an engine compartment, including a heat insulation layer 1, a protection layer 2, a non-woven fabric layer 3 and an adhesive layer 4.

[0026] Please refer to Figure 1 and Figure 2 simultaneously. The heat insulation layer 1 is made of PET foam cotton. The non-woven fabric layer 3 is bonded to one side of the heat insulation layer 1 through a thermal bonding process. The protection layer 2 is made of silicone rubber and is bonded to the side of the non-woven fabric layer 3 away from the heat insulation layer 1. The adhesive layer 4 is arranged on the side of the heat insulation layer 1 away from the non-woven fabric layer 3. A sound insulation layer 5 is arranged between the heat insulation layer 1 and the adhesive layer 4. The sound insulation layer 5 includes a sound absorption board 51 and a sound insulation felt 52. The sound absorption board 51 is made of glass fiber sound absorption cotton and is bonded to the side of the heat insulation layer 1 away from the non-woven fabric layer 3. The sound insulation felt 52 is bonded to the side of the sound absorption board 51 away from the heat insulation layer 1. The adhesive layer 4 includes an adhesive board 41 and a release paper 42. The adhesive board 41 is bonded to the side of the sound insulation felt 52 away from the sound absorption board 51. A high-temperature resistant glue is coated on the side of the adhesive board 41 away from the sound insulation felt 52. The release paper 42 is bonded to the side of the adhesive board 41 away from the sound insulation felt 52.

[0027] As can be seen from the above, for the sound-absorbing and heat-insulating cotton board for the engine compartment provided by the embodiments of the present application, when installing the heat-insulating cotton board, the user can first cut the heat-insulating cotton board into a suitable shape according to the size of the position where the heat-insulating cotton board needs to be pasted, and then tear the release paper 42 from the paste board 41, and paste the side of the paste board 41 coated with high-temperature resistant glue at the corresponding position. The release paper 42 plays a protective role for the glue coated on the paste board 41 and allows the heat-insulating cotton board to be wound during production, which facilitates the storage and transportation of the release paper 42. Since a large amount of heat is generated when the engine is working and the temperature inside the engine compartment is relatively high, the high-temperature resistant glue can still maintain its viscosity in a certain high-temperature environment, avoiding the phenomenon that the heat-insulating cotton board falls off due to the decrease in the viscosity of the bonding glue caused by high temperature; the PET foam cotton has a loose and porous internal structure, and the air contained in it makes it have excellent heat-insulating performance. The non-woven fabric layer 3 has good air permeability, which is conducive to the heat-insulating layer 1 absorbing heat energy. However, the mechanical strength of the PET foam cotton is relatively low and it is easy to be damaged when subjected to external forces. After the heat-insulating layer 1 made of PET foam cotton is broken, its heat-insulating performance will decrease. The silicone rubber has good mechanical strength and wear resistance. The protective layer 2 made of silicone rubber can absorb part of the impact force when the heat-insulating cotton board is collided by an external object, thereby playing a protective role for the heat-insulating layer 1 and avoiding the decrease in the heat-insulating performance of the heat-insulating cotton board caused by the rupture of the heat-insulating layer 1 due to external force. The silicone rubber also has excellent high-temperature resistance and can be used for a long time in the high-temperature environment inside the engine compartment; when the engine is working, it will also generate relatively large noise, which will affect the interior of the car compartment and reduce the comfort of the passengers in the compartment. The glass fiber sound-absorbing cotton has a loose and porous interior, and can convert the vibration energy of the air inside it into the vibration energy of the sound-absorbing cotton material, thereby weakening the passing sound waves. The sound-absorbing board 51 can absorb part of the noise emitted by the engine and play a noise reduction role. The sound insulation felt 52 has a strong reflection effect on sound waves. After the noise sound waves are weakened by the sound-absorbing board 51, the sound insulation felt 52 will reflect part of the noise sound waves back to the sound-absorbing board 51, and the sound-absorbing board 51 will continue to absorb the noise sound waves, thereby enhancing the overall noise reduction effect of the heat-insulating cotton board.

[0028] In some embodiments, please also refer to Figure 1 and Figure 2 , a corrugated aluminum foil 6 is bonded to the side of the protective layer 2 away from the heat-insulating layer 1.

[0029] With such a setting, the corrugated aluminum foil 6 can prevent the internal materials of the heat-insulating cotton board from coming into contact with various possible oil droplets and moisture in the engine compartment, avoid the corrosion of the internal part of the heat-insulating cotton board by these liquids, and increase the service life of the heat-insulating cotton board. The corrugated aluminum foil 6 can also prevent the internal materials of the heat-insulating cotton board from coming into contact with open fire and air. When a fire occurs during the transportation and use of the heat-insulating cotton board, the corrugated aluminum foil 6 can prevent the materials inside the heat-insulating cotton board from burning, play a flame retardant role, and reduce the potential safety hazards existing when the heat-insulating cotton board is used.

[0030] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A sound-absorbing and heat-insulating cotton board for an engine compartment, characterized in that: The invention comprises a heat insulating layer (1), a protective layer (2), a non-woven fabric layer (3) and an adhesive layer (4), wherein the heat insulating layer (1) is made of PET foam cotton, the non-woven fabric layer (3) is bonded to one side of the heat insulating layer (1) by a thermal bonding process, the protective layer (2) is made of silicone rubber, the protective layer (2) is bonded to one side of the non-woven fabric layer (3) away from the heat insulating layer (1), and the adhesive layer (4) is arranged on one side of the heat insulating layer (1) away from the non-woven fabric layer (3).

2. The sound-absorbing and heat-insulating cotton board for an engine compartment according to claim 1, characterized in that: The adhesive layer (4) comprises an adhesive plate (41), wherein the adhesive plate (41) is bonded to a side of the thermal insulation layer (1) away from the non-woven fabric layer (3), and the side of the adhesive plate (41) away from the thermal insulation layer (1) is coated with high temperature resistant glue.

3. The sound-absorbing and heat-insulating cotton board for an engine compartment according to claim 2, characterized in that: The adhesive layer (4) further comprises a release paper (42), wherein the release paper (42) is adhered to a surface of the adhesive plate (41) away from the heat insulation layer (1).

4. The sound-absorbing and heat-insulating cotton board for an engine compartment according to claim 3, characterized in that: A sound insulation layer (5) is provided between the heat insulation layer (1) and the adhesive plate (41), the sound insulation layer (5) comprising a sound absorbing plate (51), the sound absorbing plate (51) being made of glass fiber sound absorbing cotton, one side of the sound absorbing plate (51) being bonded to the heat insulation layer (1), and the other side of the sound absorbing plate (51) being bonded to the adhesive plate (41).

5. The sound-absorbing and heat-insulating cotton board for an engine compartment according to claim 4, characterized in that: The sound insulation layer (5) further comprises a sound insulation felt (52), wherein the sound insulation felt (52) is arranged between the sound absorbing board (51) and the adhesive board (41), wherein one side of the sound insulation felt (52) is bonded to the sound absorbing board (51), and the other side of the sound insulation felt (52) is bonded to the adhesive board (41).

6. The sound-absorbing and heat-insulating cotton board for an engine compartment according to claim 5, characterized in that: An embossed aluminum foil (6) is bonded to the side of the protective layer (2) away from the heat insulation layer (1).

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