JP7778005B2 - soundproofing materials - Google Patents

Description

The present invention relates to soundproofing materials.

Soundproofing materials are attached to vehicle drive sources and other components to prevent the transmission of sound and vibration. When a drive source or other component generates heat, heat dissipation is also required in addition to preventing the transmission of sound and vibration. For example, Reference 1 discloses a soundproof and heat-dissipating material in which a heat transfer path is formed from one surface to another by a linear heat-dissipating member. Furthermore, Reference 2 discloses a sound-absorbing cover in which a heat-dissipating section is provided in at least a portion of the cover body, providing thermal communication between the outside of the soundproof cover and the enclosed space.

International Publication No. 2020/110320 Japanese Patent Application Laid-Open No. 2006-233868

However, the soundproof and heat-dissipating material in Document 1 is made of metal wires such as aluminum, stainless steel, copper, and alloys containing these as heat-dissipating members. Furthermore, the sound-absorbing cover in Document 2 has a heat-dissipating portion made of aluminum, so there is room for improvement in terms of heat-dissipating member retention and weight reduction.

The objective of the present invention is to provide a soundproofing material that improves the heat dissipation section's retention performance and is lightweight.

In order to solve the above-mentioned problems, one aspect of the present invention is a soundproofing member formed from a foamed resin and used to cover an object, the soundproofing member comprising: a main body portion formed in a planar shape; a plurality of ridges integrally molded on the surface of the main body portion and extending in a first direction at predetermined intervals; thermally conductive fillers arranged in the main body portion at predetermined intervals in the first direction and continuously arranged in the thickness direction of the main body portion and the plurality of ridges; and first thermally conductive particles embedded in the top surfaces of the plurality of ridges and continuously arranged in the first direction.

With the above configuration, the heat dissipation portion, which forms the heat transfer path in the thickness direction of the soundproofing member, is formed from thermally conductive filler arranged in the thickness direction of the main body and multiple ridges. Furthermore, the heat dissipation portion, which forms the heat transfer path in the surface direction of the soundproofing member, is formed from first thermally conductive particles embedded in the top surface of each ridge so that they are continuously arranged along the first direction, which is the extension direction. Because the thermally conductive filler and first thermally conductive particles that form the heat dissipation portion are embedded in the soundproofing member, the heat dissipation portion can have improved retention performance and be lighter in weight compared to when a structure such as wire is used as the heat dissipation portion.

When an object covered with the soundproofing material generates heat, the heat is transferred from the back side of the main body to the front side, using the main body and the thermally conductive filler arranged in the thickness direction of the multiple ridges as a heat transfer path. The heat transferred to the front side of the multiple ridges is transferred to the end side of the ridges in the first direction, using the first thermally conductive particles arranged in the first direction, which is the extension direction, on the top surface of each ridge as a heat transfer path. This reduces the accumulation of heat in the surface direction (first direction), and improves heat dissipation in the surface direction (first direction).

In order to solve the above-mentioned problems, another aspect of the present invention is a soundproofing member formed from a foamed resin and adapted to cover an object, the soundproofing member comprising: a main body portion formed in a planar shape; a plurality of ridges integrally molded on the surface of the main body portion and extending in a first direction at predetermined intervals; thermally conductive fillers arranged in the main body portion at predetermined intervals in the first direction and continuously arranged in the thickness direction of the main body portion and the plurality of ridges; and second thermally conductive particles embedded in surface regions located between adjacent ridges of the plurality of ridges in the main body portion and continuously arranged in the first direction.

With the above configuration, the heat dissipation portion, which forms the heat transfer path in the thickness direction of the soundproofing member, is formed from thermally conductive filler arranged in the thickness direction of the main body and the multiple ridges. Furthermore, the heat dissipation portion, which forms the heat transfer path in the surface direction of the soundproofing member, is formed from second thermally conductive particles embedded in a continuous array along the first direction, which is the extension direction, on the surface located between adjacent ridges of the multiple ridges in the main body. Because the thermally conductive filler and second thermally conductive particles that form the heat dissipation portion are embedded in the soundproofing member, the heat dissipation portion can have improved retention performance and be lighter than when a structure such as wire is used as the heat dissipation portion.

When an object covered with the soundproofing material generates heat, the heat is transferred from the back side to the front side of the main body, using the main body and the thermally conductive filler arranged in the thickness direction of the multiple ridges as a heat transfer path. The heat transferred to the front side of the main body is then transferred to the end side of the main body in the first direction, using the second thermally conductive particles arranged in the first direction in the surface regions located between adjacent ridges of the multiple ridges on the main body as a heat transfer path. This reduces heat retention in the surface direction (first direction), and improves heat dissipation in the surface direction (first direction).

FIG. 2 is a perspective view of a soundproofing member according to a first example. 2 is a partial cross-sectional view of FIG. 1 taken along line 2-2. 3 is a partial cross-sectional view of FIG. 1 taken along line 3-3. FIG. 10 is a perspective view of a soundproofing member according to a second example. 5 is a partial cross-sectional view of FIG. 4 taken along line 5-5. This is a cross-sectional view of 6-6 in Figure 4. FIG. 10 is a cross-sectional view of a soundproofing member according to a third example.

(1. Overall configuration of the soundproofing member of the first example)
The structure of the soundproofing member 1a will be described with reference to Fig. 1. The soundproofing member 1a covers an object (not shown) to prevent the transmission of sound and vibrations generated from the object while dissipating heat generated by the object. The object may be, for example, a motor or engine, which is a power source of a vehicle, an intake manifold, an air compressor, or the like.

The soundproofing member 1a is formed in a planar shape overall. In this embodiment, it is formed in a flat plate shape that is rectangular in a plan view. The soundproofing member 1a may cover the entire outer surface of the object or a specific area thereof, and may have any shape depending on the shape of the object and the area to be covered. Furthermore, when covering a curved target portion, the soundproofing member 1a may have a curved shape that matches the outer shape of the object. The back surface of the main body 10a (the lower surface in FIG. 1) is placed on the outer surface of the object.

(2. Components of the soundproofing member of the first example)
The components of the soundproofing member 1a of the first example will be described with reference to Figures 1-3. The soundproofing member 1a includes a main body 10a and a plurality of ridges 11a. The main body 10a and each ridge 11a are integrally molded. The ridges 11a can be integrally molded with the main body 10a by injecting foaming resin raw material into a molding die (lower die) having recesses corresponding to the shape of each ridge.

The main body 10a is formed in a rectangular shape when viewed from above. In this embodiment, it is formed in the shape of a flat plate with a thickness of 4 mm and a substantially uniform thickness in the planar direction.

The main body 10a is made of foamed resin. Examples of foamed resin that can be used include urethane foam, acrylic foam, silicone foam, styrene foam, foamed olefin (foamed PP, foamed PE), foamed PVC, foamed EVA, and foamed PA. For example, it is recommended to use foamed resin with an Asker C hardness of 60 to 90 degrees.

A plurality of ridges 11a are provided on the surface of the main body 10a. The plurality of ridges 11a are provided so as to extend along the surface of the main body 10a. In this embodiment, the plurality of ridges 11a are provided so as to be continuous from one end to the other end of two opposing side edges of the main body 10a. The plurality of ridges 11a are provided approximately parallel to each other at a predetermined interval. The extension direction of the plurality of ridges 11a can be set in any direction depending on the shape of the object and the installation environment. In the following explanation, the extension direction of the ridges 11a will be described as the first direction.

As shown in Figure 2, the multiple protrusions 11a are formed in a wave-like shape overall. In this embodiment, in a cross section perpendicular to the first direction, each protrusion 11a rises approximately vertically upward from the surface of the main body 10a, and has a curved top surface that is convex upward. The base portion rising from the main body 10a is rounded. In this embodiment, the height of each protrusion 11a is 5 mm. Note that each protrusion 11a only needs to be convex, and the cross-sectional shape perpendicular to the first direction can be any shape, such as spherical, hemispherical, trapezoidal, or triangular.

As shown in Figure 2, in this embodiment, the multiple protrusions 11a are arranged at intervals slightly longer than the height of the protrusions 11a. The arrangement interval between the protrusions can be set arbitrarily depending on the shape of the object, etc.

The multiple ridges 11a are formed from foamed resin. Examples of foamed resin that can be used include urethane foam, acrylic foam, silicone foam, styrene foam, foamed olefin (foamed PP, foamed PE), foamed PVC, foamed EVA, and foamed PA. For example, foamed resin with an Asker C hardness of 60 to 90 degrees is recommended.

As shown in Figure 2, the soundproofing member 1a has thermally conductive fillers 12 arranged from the back surface (the bottom surface in Figure 2) to the front surface (the top surface in Figure 2). The thermally conductive fillers 12 are arranged in a continuous line in the thickness direction of the main body 10a and each protrusion 11a. Note that Figure 2 shows the thermally conductive fillers 12 in a schematic representation, and in reality, they will have a shape that corresponds to the thermally conductive filler used.

The thermally conductive fillers 12 are arranged at predetermined intervals in the surface direction of the main body 10a. In this embodiment, as shown in Figures 1 and 2, in the direction perpendicular to the first direction, the thermally conductive fillers 12 are arranged in the central portions of the multiple protrusions and in the intermediate portions between adjacent protrusions. As shown in Figure 3, the thermally conductive fillers 12 are also arranged at predetermined intervals in the first direction.
The arrangement interval (arrangement density) in the surface direction can be set arbitrarily depending on the heat generation characteristics of the object.

In this way, the thermally conductive filler 12 is arranged in the thickness direction of the soundproofing member 1a (main body 10a and multiple ridges 11a) at multiple locations on the surface of the soundproofing member 1a, thereby forming multiple heat transfer paths (first heat transfer paths) from the back surface to the front surface of the soundproofing member 1a.

The thermally conductive filler 12 is made of stainless steel. The thermal conductivity of the thermally conductive filler is preferably 200 W/mK or higher. A copper-iron alloy or the like is preferably used as the thermally conductive filler. When using a magnetic filler with high thermal conductivity as the thermally conductive filler, for example, a foamed resin raw material mixed with the magnetic filler can be injected into a mold and foam-molded while a magnetic field is applied in the thickness direction. When using a non-magnetic filler, for example, the thermally conductive filler can be aligned in the thickness direction by first fixing and aligning it with adhesive or the like and then holding it in the mold, and then the foamed resin raw material can be injected and foam-molded.

As shown in Figures 2 and 3, the soundproofing member 1a has first thermally conductive particles 13 arranged on the top surface, which is the protruding tip of each protrusion 11a. As shown in Figure 2, in this embodiment, three first thermally conductive particles 13 are arranged along the convex curved surface of each protrusion 11a in a cross section perpendicular to the extension direction (first direction) of each protrusion 11a. As shown in Figure 3, the first thermally conductive particles 13 are arranged in a continuous line along the extension direction (first direction) of each protrusion 11a. Note that Figures 2 and 3 show the first thermally conductive particles 13 in a schematic representation, and in reality, the shape will depend on the first thermally conductive particles used. The number of first thermally conductive particles arranged along the convex curved surface of each protrusion 11a can be set as desired depending on the shape of the soundproofing member and the size of the first thermally conductive particles.

As shown in Figures 2 and 3, the first thermally conductive particles 13 are embedded in the surface layer of each ridge 11a. In this embodiment, the first thermally conductive particles 13 are mostly embedded in the surface layer of each ridge 11a, with some exposed. With this configuration, the first thermally conductive particles 13 are held in the surface layer of the soundproofing member 1a (each ridge 11a), preventing the first thermally conductive particles 13 from falling off the soundproofing member 1a. From the perspective of improving retention performance, it is sufficient for approximately half or more of the maximum diameter of the first thermally conductive particles 13 to be embedded, and the entire first thermally conductive particles 13 may also be embedded.

For example, by arranging the first thermally conductive particles continuously in the recesses of a molding die (lower die) that has recesses corresponding to the shape of each protrusion, and then injecting foaming resin raw material into the molding die to perform foam molding, the first thermally conductive particles 13 can be embedded in an aligned state on the surface layer of each protrusion 11a.

In this way, the first thermally conductive particles 13 are arranged in the extension direction (first direction) on the top surface of each protrusion 11a, thereby forming multiple heat transfer paths (second heat transfer paths) from one end to the other end of the main body 10a (each protrusion 11a) in the first direction.

The first thermally conductive particles 13 are formed from aluminum hydroxide particles. The thermal conductivity of the first thermally conductive particles is preferably 20 W/mK or higher. Materials such as magnesium oxide, boron nitride, carbon materials such as graphite, expanded graphite, and carbon fiber, aluminum, magnesium, gold, silver, copper, and alloys based on these materials, or oxides of these materials may be used as the first thermally conductive particles.

As shown in Figures 2 and 3, in this embodiment, the soundproofing member 1a is arranged so that the thermally conductive fillers 12 arranged in the thickness direction and some of the first thermally conductive particles 13 arranged in the first direction are in contact with each other on the top surface of each protrusion 11a. In other words, multiple first heat transfer paths formed by the thermally conductive fillers 12 and multiple second heat transfer paths formed by the first thermally conductive particles 13 are arranged so that they are continuous with each other. Note that the first thermally conductive particles 13 only need to be arranged in the first direction, and may not be in contact with the thermally conductive fillers 12.

(2. Effect of the soundproofing member of the first example)
In the soundproofing member 1a, the heat dissipation portion that forms a heat transfer path in the thickness direction of the soundproofing member 1a is formed by thermally conductive filler 12 arranged in the thickness direction of the main body 10a and the multiple ridges 11a. Also, the heat dissipation portion that forms a heat transfer path in the surface direction of the soundproofing member 1a is formed by first thermally conductive particles 13 embedded in the top surface of each ridge 11a so as to be continuously arranged along a first direction, which is the extension direction. Because the heat dissipation portion is formed by thermally conductive filler 12 and first thermally conductive particles 13 that are continuously arranged while embedded in the soundproofing member 1a, the retention performance of the heat dissipation portion can be improved and the weight can be reduced compared to when a structure such as a wire is used as the heat dissipation portion.

The soundproofing member 1a includes a main body 10a and multiple ridges 11a, with thermally conductive fillers 12 continuously arranged in the thickness direction, including the main body 10a and each ridge 11a. The thermally conductive fillers 12 are arranged at predetermined intervals along the surface of the main body 10a, so the soundproofing member 1a has multiple heat transfer paths (first heat transfer paths) formed by the thermally conductive fillers 12 arranged in the thickness direction. Therefore, when an object covered with the soundproofing member 1a generates heat, the generated heat is transferred from the back surface to the front surface of the soundproofing member 1a via the multiple first heat transfer paths, allowing the heat from the object to be guided to the surface side of the soundproofing member 1a.

The soundproofing member 1a has first thermally conductive particles 13 continuously arranged on the top surfaces of the multiple ridges 11a along the extension direction (first direction) of each ridge 11a, providing multiple heat transfer paths (second heat transfer paths) formed by the first thermally conductive particles 13 arranged in the first direction of the main body 10a (each ridge 11a). Therefore, heat transferred to the surface side of the soundproofing member 1a is transferred via the multiple second heat transfer paths to the end side of the main body 10a (each ridge 11a) in the first direction, allowing the heat of the object to be dissipated outside the surface direction of the soundproofing member 1a.

For example, when the soundproofing member 1a is applied to an object with a long shape or a large outer surface area, the extension direction (first direction) of each protrusion 11a can be aligned with any direction, such as the long dimension of the object or the maximum width direction of the outer surface, to reduce the accumulation of heat generated by the object in the intermediate region of the surface of the soundproofing member 1a, and allow the heat to be dissipated to the outside in the surface direction (first direction).

For example, when the soundproofing member 1a is applied to an object in an air-blowing environment, by aligning the extension direction (first direction) of each protrusion 11a with the air-blowing direction in the air-blowing environment, the recesses formed between adjacent protrusions 11a become air-blowing passages, reducing the accumulation of heat generated by the object in the middle region of the surface of the soundproofing member 1a and allowing the heat to be dissipated more effectively to the outside in the surface direction (first direction).

(3. Second Example Soundproofing Member)
A second example of a soundproofing member 1b will be described with reference to Figures 4-6. The soundproofing member 1b has a configuration in which the arrangement of thermally conductive particles is changed compared to the soundproofing member 1a of the first example, but other configurations are the same as those of the soundproofing member 1a. The same reference numerals are used for the same configurations as the soundproofing member 1a, and detailed descriptions will be omitted.

The soundproofing member 1b comprises a main body 10b and multiple ridges 11b. The multiple ridges 11b are integrally molded with the main body 10b and are provided so as to be continuous from one end to the other end of two opposing side edges of the main body 10b. The configuration of the ridges 11b is the same as the configuration of the ridges 11a in the first example. The extension direction of the multiple ridges 11b is referred to as the first direction.

As shown in Figure 5, the soundproofing member 1b has thermally conductive fillers 12 arranged from the back surface (bottom surface in Figure 5) to the front surface (top surface in Figure 5). The thermally conductive fillers 12 are arranged in a continuous line in the thickness direction of the main body 10b and each protrusion 11b. Note that Figure 5 shows the thermally conductive fillers 12 in a schematic representation, and in reality, the shape will depend on the thermally conductive filler used. As shown in Figures 5-6, the thermally conductive fillers 12 are arranged at predetermined intervals in the surface direction of the main body 10b, as in the first embodiment.

In other words, in soundproofing member 1b, where ribs 11b are provided, thermally conductive filler 12 is arranged continuously from the back surface of main body 10b to the top surface of ribs 11b, and in where ribs 11b are not provided, thermally conductive filler 12 is arranged continuously from the back surface to the front surface of main body 10b. In this way, soundproofing member 1b has multiple heat transfer paths (first heat transfer paths) formed from the back surface to the front surface of soundproofing member 1b.

As shown in Figures 5 and 6, the soundproofing member 1b has second thermally conductive particles 14 arranged on the surface of the main body 10b located between adjacent ridges 11b among the multiple ridges 11b. As shown in Figure 5, in this embodiment, three second thermally conductive particles 14 are arranged along the surface of the main body 10b located between adjacent ridges 11b in a cross section perpendicular to the extension direction (first direction) of the ridges 11a. As shown in Figure 6, the second thermally conductive particles 14 are arranged in a continuous line along the extension direction (first direction) of the ridges 11a. Note that Figures 5 and 6 show the second thermally conductive particles 13 as a schematic representation, and the shape of the second thermally conductive particles actually varies depending on the type of second thermally conductive particles used. The number of second thermally conductive particles arranged along the surface of the main body 10b located between adjacent ridges 11b can be determined as desired depending on the shape of the soundproofing member and the size of the second thermally conductive particles.

As shown in Figures 5 and 6, the second thermally conductive particles 14 are embedded in the surface of the main body 10b. In this embodiment, the second thermally conductive particles 14 are mostly embedded in the surface layer of the main body 10b, with some exposed. With this configuration, the second thermally conductive particles 14 are held in the surface layer of the soundproofing member 1b (main body 10b), preventing the second thermally conductive particles 14 from falling off the soundproofing member 1b. From the perspective of improving retention performance, it is sufficient that approximately half or more of the maximum diameter of the second thermally conductive particles 14 is embedded, and the entire second thermally conductive particles 14 may also be embedded.

In this way, the second thermally conductive particles 14 are arranged in the extension direction (first direction) of the protrusions 11b on the surface of the main body 10b located between adjacent protrusions 11b, thereby forming multiple heat transfer paths (third heat transfer paths) from one end to the other end of the main body 10b (each protrusion 11b) in the first direction.

The second thermally conductive particles 14 are formed from aluminum hydroxide particles. The thermal conductivity of the first thermally conductive particles is preferably 20 W/mK or higher. The first thermally conductive particles may be made of magnesium oxide, boron nitride, carbon materials such as graphite, expanded graphite, and carbon fiber, aluminum, magnesium, gold, silver, copper, alloys containing these as a base material, or oxides of these materials.

As shown in Figures 5 and 6, in this embodiment, the soundproofing member 1b is arranged so that the thermally conductive fillers 12 arranged in the thickness direction and some of the second thermally conductive particles 14 arranged in the first direction are in contact with each other on the surface of the main body 10b located between adjacent ridges 11b of the multiple ridges 11b. In other words, multiple first heat transfer paths formed by the thermally conductive fillers 12 and multiple third heat transfer paths formed by the second thermally conductive particles 14 are formed so as to be continuous with each other. Note that the second thermally conductive particles 14 only need to be arranged in the first direction, and may not be in contact with the thermally conductive fillers 12.

(4. Effect of the soundproofing member of the second example)
In the soundproofing member 1b, the heat dissipation portion that forms a heat transfer path in the thickness direction of the soundproofing member 1b is formed by thermally conductive filler 12 arranged in the thickness direction of the main body 10b and the multiple ridges 11b. Furthermore, the heat dissipation portion that forms a heat transfer path in the planar direction of the soundproofing member 1b is formed by second thermally conductive particles 14 embedded in a continuous array along the first direction, which is the extension direction, on the surface of the main body 10b located between adjacent ridges 11b of the multiple ridges 11b. Because the heat dissipation portion is formed by thermally conductive filler 12 and second thermally conductive particles 14 that are continuously arranged while embedded in the soundproofing member 1b, the heat dissipation portion can have improved retention performance and be lighter than when a structure such as a wire is used as the heat dissipation portion.

Soundproofing member 1b includes a main body 10b and multiple ridges 11b, with thermally conductive fillers 12 arranged in the thickness direction, including the main body 10b and each ridge 11b. The thermally conductive fillers 12 are arranged at predetermined intervals along the surface of the main body 10b, so soundproofing member 1b has multiple heat transfer paths (first heat transfer paths) formed by the thermally conductive fillers 12 arranged in the thickness direction. Therefore, when an object covered with soundproofing member 1b generates heat, the generated heat is transferred from the back surface to the front surface of soundproofing member 1b via the multiple first heat transfer paths, allowing the heat of the object to be guided to the surface side of soundproofing member 1b.

The soundproofing member 1b has second thermally conductive particles 14 arranged along the extension direction (first direction) of each of the multiple protrusions 11b on the surface of the main body 10b located between adjacent protrusions 11b, thereby providing multiple heat transfer paths (third heat transfer paths) formed by second thermally conductive particles 13 arranged in the first direction of the main body 10b (each protrusion 11a). Therefore, heat transferred to the surface side of the soundproofing member 1a is transferred via the multiple third heat transfer paths to the end side of the main body 10b (each protrusion 11b) in the first direction, allowing the heat of the object to be dissipated outside in the surface direction (first direction) of the soundproofing member 1b.

For example, when soundproofing member 1b is applied to an object with a long shape or a large outer surface area, the extension direction (first direction) of each protrusion 11b can be aligned with any direction, such as the long dimension of the object or the maximum width direction of the outer surface, to reduce the accumulation of heat generated by the object in the intermediate region in the surface direction of soundproofing member 1b, and allow the heat to be dissipated to the outside in the surface direction (first direction).

For example, when soundproofing member 1b is applied to an object in an air-blowing environment, by aligning the extension direction (first direction) of each protrusion 11b with the air-blowing direction in the air-blowing environment, the recesses formed between adjacent protrusions become air-blowing passages, reducing the accumulation of heat generated by the object in the intermediate region in the surface direction of soundproofing member 1b and allowing the heat to be dissipated to the outside in the surface direction (first direction).

5. Other Examples
The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

The soundproofing member 1a of the first example above may be configured to further include the second thermally conductive particles 14 of the soundproofing member 1b of the second example above. Specifically, in the soundproofing member 1a, the second thermally conductive particles 14 may be arranged in a line along the extension direction (first direction) of the protrusions 11a on the surface of the main body 10a located between adjacent protrusions 11a of the multiple protrusions 11a.

In other words, this modified example of soundproofing member 1a has multiple heat transfer paths (second heat transfer paths) formed by first thermally conductive particles 13 arranged in the first direction of main body 10a (each protrusion 11a), as well as multiple heat transfer paths (third heat transfer paths) formed by second thermally conductive particles 14 arranged in the first direction. Therefore, when an object covered with soundproofing member 1b generates heat, the heat transferred from the back surface to the front surface of soundproofing member 1a via multiple heat transfer paths (first heat transfer paths) formed by thermally conductive fillers 12 arranged in the thickness direction can be dissipated to the outside in the surface direction (first direction) via multiple second heat transfer paths and multiple third heat transfer paths.

A third example of soundproofing member 1c will be described with reference to Figure 7. Soundproofing member 1c is the same as soundproofing member 1a of the first example, soundproofing member 1b of the second example, or a modified version of soundproofing member 1a, but further includes a thermally conductive resin film 20 laminated on the surfaces of main body 10 (10a, 10b) and multiple ridges 11 (11a, 11b). In this example, resin film 20 is made of urethane resin. Alternatively, a resin film with a thermal conductivity of 0.1 W/mK to 0.3 W/mK can be used.

For example, by placing the resin sheet 20 on the inner surface of a molding die (lower die) that has recesses corresponding to the shape of each ridge, and then injecting foaming resin raw material to perform foam molding, the resin sheet 20 can be integrally molded onto the surfaces of the main body 10 and the multiple ridges 11.

The soundproofing member 1c has a heat-conductive resin film 20 laminated on the surfaces of the main body 10 and the multiple protrusions 11, thereby providing a planar heat transfer path (fourth heat transfer path) formed by the heat-conductive resin film 20 on the surface of the soundproofing member 1c.

As a result, when an object covered with soundproofing material 1c generates heat, the heat is transferred from the rear surface to the front surface of soundproofing material 1c via multiple heat transfer paths (first heat transfer paths) formed by thermally conductive fillers 12 arranged in the thickness direction. The heat is then dissipated in the surface direction via multiple second and/or third heat transfer paths, as well as a fourth heat transfer path, allowing for effective heat dissipation in the surface direction. Furthermore, because the surfaces of main body 10 and multiple ridges 11 are covered with resin film 20, even if thermally conductive fillers 12, first thermally conductive particles 13, or second thermally conductive particles 14 fall off, this prevents them from being released to the outside.

In each of the above embodiments and variations, the back surface of the soundproofing material 1 may be in an open-cell state, where the cells of the foamed resin are open. Sound emitted by the vibration of an object covered by the soundproofing material 1 is incident from multiple directions through the open cells on the back surface of the soundproofing material 1, thereby improving sound absorption characteristics.

1a, 1b, 1c: soundproofing member; 10a, 10b, 10c: main body; 11a, 11b, 11c: protrusion; 12: thermally conductive filler; 13: first thermally conductive particle; 14: second thermally conductive particle; 20: resin film

Claims (8)

A soundproofing member formed of a foamed resin and covering an object,
a main body portion formed in a planar shape;
a plurality of protrusions integrally formed on a surface of the main body and extending in a first direction at predetermined intervals;
thermally conductive fillers arranged in the main body portion at predetermined intervals in the first direction and continuously arranged in a thickness direction of the main body portion and the plurality of protrusions;
first thermally conductive particles embedded in the top surfaces of the plurality of protrusions and arranged continuously in the first direction;
A soundproofing member comprising: The soundproofing member described in claim 1, wherein the thermally conductive filler and the first thermally conductive particles are arranged in contact with each other on the top surfaces of the plurality of protrusions. The soundproofing member according to claim 1 or 2, wherein the main body portion is provided with second thermally conductive particles embedded in the surface regions located between adjacent ridges of the plurality of ridges and arranged continuously in the first direction. The soundproofing member described in claim 3, wherein the thermally conductive filler and the second thermally conductive particles are arranged in contact with each other in the surface region. A soundproofing member formed of a foamed resin and covering an object,
a main body portion formed in a planar shape;
a plurality of protrusions integrally formed on a surface of the main body and extending in a first direction at predetermined intervals;
thermally conductive fillers arranged in the main body portion at predetermined intervals in the first direction and continuously arranged in a thickness direction of the main body portion and the plurality of protrusions;
second thermally conductive particles embedded in a surface region of the body portion between adjacent ridges of the plurality of ridges and arranged continuously in the first direction;
A soundproofing member comprising: The soundproofing member according to any one of claims 1 to 5, comprising a thermally conductive resin film laminated on the main body and the plurality of ridges. A soundproofing member formed of a foamed resin and covering an object,
a main body portion formed in a planar shape;
a plurality of protrusions integrally formed on a surface of the main body and extending in a first direction at predetermined intervals;
thermally conductive fillers arranged at predetermined intervals in a surface direction of the main body and continuously arranged in a thickness direction of the main body and the plurality of protrusions;
first thermally conductive particles embedded in the top surfaces of the plurality of protrusions and arranged continuously in the first direction;
a thermally conductive resin film laminated on the main body and the plurality of ridges;
A soundproofing member comprising: A soundproofing member formed of a foamed resin and covering an object,
a main body portion formed in a planar shape;
a plurality of protrusions integrally formed on a surface of the main body and extending in a first direction at predetermined intervals;
thermally conductive fillers arranged at predetermined intervals in a surface direction of the main body and continuously arranged in a thickness direction of the main body and the plurality of protrusions;
second thermally conductive particles embedded in a surface region of the body portion between adjacent ridges of the plurality of ridges and arranged continuously in the first direction;
a thermally conductive resin film laminated on the main body and the plurality of ridges;
A soundproofing member comprising: