soundproofing materials

Abstract

To provide a soundproof member that improves retention performance of a heat dissipation part and provides a lightweight soundproof member.SOLUTION: A soundproof member covering an object comprises a body portion 10a formed in planar shape, and a plurality of protruding strips 11a integrally molded on a surface of the body portion 10a. A thermally conductive filler 12 is continuously arranged in a thickness direction of the body portion 10a and the plurality of protruding strips 11a, and first thermally conductive particles 13 are continuously arranged on top surfaces of the plurality of protruding strips 11a in a buried state.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a soundproofing member. [Background technology]

[0002] Soundproofing materials are attached to the drive source of a vehicle to prevent the transmission of sound and vibration. When the drive source generates heat, the material is required to have a heat dissipation function in addition to the function of preventing the transmission of sound and vibration. For example, Literature 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 dissipation member. Literature 2 also discloses a sound-absorbing cover in which a heat dissipation part is provided in at least a part of the cover body to thermally connect the outside of the soundproof cover with the enclosed space. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 110320 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-233868 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the soundproof and heat-dissipating material of Document 1 is made of metal wires such as aluminum, stainless steel, copper, and alloys containing these metals as heat-dissipating members.In addition, the sound-absorbing cover of Document 2 has a heat-dissipating portion made of aluminum, so there is room for improvement in terms of the retention of the heat-dissipating member and weight reduction.

[0005] An object of the present invention is to provide a soundproofing member that can improve the heat dissipation section retention performance and can be made lighter. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention is a soundproofing member formed of a foamed resin and covering an object, the soundproofing member comprising: a main body formed in a planar shape; a plurality of protrusions integrally molded on the surface of the main body and extending in a first direction at predetermined intervals; In the first direction The soundproofing member comprises thermally conductive fillers arranged at predetermined intervals and continuously arranged in the thickness direction of the main body 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.

[0007] According to the above configuration, the heat dissipation portion that forms the heat transfer path in the thickness direction of the soundproofing member is formed by thermally conductive filler arranged in the thickness direction of the main body and the multiple ridges. Furthermore, the heat dissipation portion that forms the heat transfer path in the surface direction of the soundproofing member is formed by first thermally conductive particles embedded in the top surfaces of the ridges so as to be 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 than when a structure such as a wire is used as the heat dissipation portion.

[0008] Furthermore, when an object covered with the soundproofing material generates heat, the heat is transferred from the back side of the body to the front side via the heat-conductive filler particles arranged in the thickness direction of the body and the multiple ridges. The heat transferred to the front side of the multiple ridges is transferred to the end side of the ridges in the first direction via the first heat-conductive particles arranged in the first direction, which is the extension direction, on the top surface of each ridge. This reduces the accumulation of heat in the surface direction (first direction), thereby improving heat dissipation in the surface direction (first direction).

[0009] In order to solve the above-mentioned problems, another aspect of the present invention is a soundproofing member formed of a foamed resin and covering an object, the soundproofing member including a main body formed in a planar shape, a plurality of protrusions integrally molded on the surface of the main body and extending in a first direction at predetermined intervals, and a plurality of protrusions integrally molded on the surface of the main body and extending in a first direction at predetermined intervals. In the first directionThe soundproofing member comprises thermally conductive fillers arranged at predetermined intervals and continuously aligned in the thickness direction of the main body and the plurality of protrusions, and second thermally conductive particles embedded in surface regions located between adjacent protrusions of the main body and continuously aligned in the first direction.

[0010] According to the above configuration, the heat dissipation portion that forms the heat transfer path in the thickness direction of the soundproofing member is formed by thermally conductive filler that is arranged in the thickness direction of the main body and the multiple ridges. Furthermore, the heat dissipation portion that forms the heat transfer path in the planar direction of the soundproofing member is formed by second thermally conductive particles that are embedded in a continuous array along the first direction, which is the extension direction, on the surface of the main body located between adjacent ridges of the multiple ridges. 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 in weight than when a structure such as a wire is used as the heat dissipation portion.

[0011] Furthermore, 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 via the main body and the thermally conductive filler particles arranged in the thickness direction of the multiple ridges. The heat transferred to the front side of the main body is transferred to the end side of the main body in the first direction via the second thermally conductive particles arranged in the first direction in the surface regions of the main body between adjacent ridges. This reduces the accumulation of heat in the surface direction (first direction), thereby improving heat dissipation in the surface direction (first direction). [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a soundproof member according to a first example. [Figure 2] FIG. 2 is a partial cross-sectional view of 2-2 in FIG. [Figure 3] 3 is a partial cross-sectional view of FIG. 1 taken along line 3-3. [Figure 4] FIG. 10 is a perspective view of a soundproof member according to a second example. [Figure 5]5 is a partial cross-sectional view of FIG. 4 taken along line 5-5. [Figure 6] FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 4. [Figure 7] FIG. 10 is a cross-sectional view of a soundproofing member according to a third example. DETAILED DESCRIPTION OF THE INVENTION

[0013] (1. Overall configuration of the soundproofing member of the first example) The configuration 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 can be, for example, a motor or engine that is a power source for a vehicle, an intake manifold, an air compressor, or the like.

[0014] The soundproofing member 1a is formed in a planar shape as a whole. 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. In addition, when covering a curved target part, the soundproofing member 1a may have a curved shape that matches the outer shape of the object. Note that the main body 10a The back surface (the lower surface in FIG. 1) is placed on the outer surface of the object.

[0015] (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. Each ridge 11a can be integrally molded with the main body 10a by injecting a foaming resin raw material into a molding die (lower die) having recesses corresponding to the shape of each ridge and foam molding the resin.

[0016] The main body 10a is formed in a rectangular shape in plan view, and in this embodiment, has a thickness of 4 mm and is formed in a flat plate shape with a substantially uniform thickness in the planar direction.

[0017] 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, foamed resin with an Asker C hardness of 60 to 90 degrees is preferably used.

[0018] 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 on 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 substantially parallel to each other at a predetermined interval. The extension direction of the plurality of ridges 11a can be set to any direction depending on the shape of the object and the installation environment. In the following description, the extension direction of the ridges 11a will be described as a first direction.

[0019] As shown in FIG. 2, the multiple protrusions 11a are formed in a wave-like shape as a whole. In this embodiment, in a cross section perpendicular to the first direction, each protrusion 11a rises substantially vertically upward from the surface of the main body 10a, and has a curved top surface that is convex upward. In addition, 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 may have any convex shape, and the cross-sectional shape perpendicular to the first direction may be any shape, such as spherical, hemispherical, trapezoidal, or triangular.

[0020] In this embodiment, the plurality of ridges 11a are arranged at intervals slightly longer than the height of the ridges 11a, as shown in Fig. 2. The arrangement intervals of the ridges can be set arbitrarily depending on the shape of the target object, etc.

[0021] The plurality of protrusions 11a are 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, foamed resin with an Asker C hardness of 60 to 90 degrees is preferably used.

[0022] As shown in Fig. 2, the soundproofing member 1a has thermally conductive fillers 12 arranged from the back surface (the lower surface in Fig. 2) to the front surface (the upper surface in Fig. 2). The thermally conductive fillers 12 are arranged in a continuous state in the thickness direction of the main body 10a and each of the protrusions 11a. Note that Fig. 2 shows the thermally conductive fillers 12 in a schematic representation, and in reality, the shape of the thermally conductive filler will depend on the thermally conductive filler used.

[0023] The thermally conductive fillers 12 are arranged at predetermined intervals in the planar 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 ridges and in the intermediate portions between adjacent ridges. Furthermore, 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 plane direction can be set arbitrarily depending on the heat generation characteristics of the object.

[0024] In this way, by arranging the thermally conductive filler 12 in the thickness direction of the soundproofing member 1a (main body 10a and multiple protrusions 11a) at multiple locations on the surface of the soundproofing member 1a, multiple heat transfer paths (first heat transfer paths) are formed from the back surface to the front surface of the soundproofing member 1a.

[0025] 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 a magnetic filler with high thermal conductivity is used 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 applying a magnetic field in the thickness direction, thereby allowing the magnetic filler to be continuously aligned in the thickness direction. When a non-magnetic filler is used, for example, the foamed resin raw material can be injected into the mold while the thermally conductive filler is aligned in advance by adhesive or the like and held in the mold.

[0026] As shown in FIGS. 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 rib 11a. As shown in FIG. 2, in this embodiment, three first thermally conductive particles 13 are arranged along the convex curved surface of each rib 11a in a cross section perpendicular to the extension direction (first direction) of each rib 11a. As shown in FIG. 3, the first thermally conductive particles 13 are arranged so as to be continuous along the extension direction (first direction) of each rib 11a. Note that FIGS. 2 and 3 show the first thermally conductive particles 13 in a schematic representation, and in reality, the first thermally conductive particles 13 will have a shape corresponding to the first thermally conductive particles used. The number of first thermally conductive particles arranged along the convex curved surface of each rib 11a can be set as desired depending on the shape of the soundproofing member and the size of the first thermally conductive particles.

[0027] 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 example, 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 from the soundproofing member 1a. From the perspective of improving holding performance, it is sufficient that approximately half or more of the maximum diameter of the first thermally conductive particles 13 is embedded, and the entire first thermally conductive particles 13 may also be embedded.

[0028] For example, by arranging the first thermally conductive particles continuously in the recesses of a molding die (lower die) having 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 of each protrusion 11a.

[0029] 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, so that multiple heat transfer paths (second heat transfer paths) are formed from one end to the other end of the main body 10a (each protrusion 11a) in the first direction.

[0030] 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. 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.

[0031] 2 and 3, in this embodiment, the soundproofing member 1a is arranged such that the thermally conductive fillers 12 arranged in the thickness direction are in contact with some of the first thermally conductive particles 13 arranged in the first direction on the top surface of each protrusion 11a. In other words, a plurality of first heat transfer paths formed by the thermally conductive fillers 12 and a plurality of second heat transfer paths formed by the first thermally conductive particles 13 are arranged so as to be 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.

[0032] (2. Effect of the soundproofing material in 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 multiple ridges 11a. In addition, 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.

[0033] The soundproofing member 1a includes a main body 10a and multiple ridges 11a, and thermally conductive fillers 12 are 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 in the planar direction 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, and the heat of the object can be guided to the surface side of the soundproofing member 1a.

[0034] 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, and therefore has 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 to the end side of the main body 10a (each ridge 11a) in the first direction via the multiple second heat transfer paths, and the heat of the object can be dissipated to the outside in the surface direction of the soundproofing member 1a.

[0035] For example, when the soundproofing material 1a is applied to an object having 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 direction of the object or the maximum width direction of the outer surface, to reduce the accumulation of heat generated from the object in the middle region of the surface direction of the soundproofing material 1a, and the heat can be dissipated to the outside in the surface direction (first direction).

[0036] 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 amount of heat generated from the object that remains in the middle region of the soundproofing member 1a in the surface direction and allowing the heat to be more effectively dissipated to the outside in the surface direction (first direction).

[0037] (3. Second Example Soundproofing Material) A second example of soundproofing member 1b will be described with reference to Figures 4-6. Soundproofing member 1b has a configuration in which the arrangement of thermally conductive particles is changed compared to soundproofing member 1a of the first example, but other configurations are the same as soundproofing member 1a. The same reference numerals are used for the same configurations as soundproofing member 1a, and detailed description will be omitted.

[0038] The soundproofing member 1b includes a main body 10b and a plurality of ridges 11b. The 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 of the first example. The extension direction of the ridges 11b is defined as a first direction.

[0039] As shown in Fig. 5, the soundproofing member 1b has thermally conductive fillers 12 arranged from the back surface (the lower surface in Fig. 5) to the front surface (the upper surface in Fig. 5). The thermally conductive fillers 12 are arranged in a continuous state in the thickness direction of the main body 10b and each protrusion 11b. Note that Fig. 5 shows the thermally conductive fillers 12 in a schematic representation, and in reality, the shape of the thermally conductive fillers will depend on the thermally conductive filler used. As shown in Figs. 5-6, the thermally conductive fillers 12 are arranged at predetermined intervals in the planar direction of the main body 10b, similar to the first embodiment.

[0040] That is, in soundproofing member 1b, where ribs 11b are provided, thermally conductive filler 12 is continuously arranged from the back surface of main body 10b to the top surface of ribs 11b, and where ribs 11b are not provided, thermally conductive filler 12 is continuously arranged 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.

[0041] As shown in FIGS. 5 and 6, the soundproofing member 1b has second thermally conductive particles 14 disposed on the surface of the main body 10b located between adjacent ridges 11b among the multiple ridges 11b. As shown in FIG. 5, in this embodiment, three second thermally conductive particles 14 are disposed 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 FIG. 6, the second thermally conductive particles 14 are arranged in a continuous line along the extension direction (first direction) of the ridges 11a. While FIGS. 5 and 6 show the second thermally conductive particles 13 in a schematic representation, the second thermally conductive particles 13 will actually have a shape corresponding to the second thermally conductive particles used. The number of second thermally conductive particles disposed 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.

[0042] 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 example, 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 holding 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.

[0043] 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 in the first direction of the main body 10b (each protrusion 11b).

[0044] 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.

[0045] 5 and 6, in this embodiment, soundproofing member 1b is arranged so that thermally conductive fillers 12 arranged in the thickness direction come into contact with some of second thermally conductive particles 14 arranged in a first direction on the surface of main body 10b located between adjacent ridges 11b of the plurality of ridges 11b. In other words, a plurality of first heat transfer paths formed by thermally conductive fillers 12 and a plurality of third heat transfer paths formed by second thermally conductive particles 14 are formed so as to be continuous with each other. Note that second thermally conductive particles 14 only need to be arranged in the first direction, and may not be in contact with thermally conductive fillers 12.

[0046] (4. Effect of soundproofing material in the second example) In soundproofing member 1b, the heat dissipation portion that forms a heat transfer path in the thickness direction of soundproofing member 1b is formed by thermally conductive filler 12 arranged in the thickness direction of main body 10b and multiple ridges 11b. In addition, the heat dissipation portion that forms a heat transfer path in the planar direction of soundproofing member 1b is formed by second thermally conductive particles 14 embedded in the surface of main body 10b between adjacent ridges 11b of multiple ridges 11b so as to be continuously arranged along the first direction, which is the extension direction. 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 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.

[0047] The soundproofing member 1b includes a main body 10b and a plurality of ridges 11b, and thermally conductive fillers 12 are arranged in the thickness direction including the main body 10b and each ridge 11b. The thermally conductive fillers 12 are arranged at predetermined intervals in the planar direction of the main body 10b, and therefore the soundproofing member 1b has a plurality of 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 1b generates heat, the generated heat is transferred from the back surface to the front surface of the soundproofing member 1b via the plurality of first heat transfer paths, and the heat of the object can be guided to the surface side of the soundproofing member 1b.

[0048] In the soundproofing member 1b, the second thermally conductive particles 14 are arranged along the extension direction (first direction) of each of the plurality of ridges 11b on the surface of the main body 10b located between adjacent ridges 11b, thereby providing a plurality of heat transfer paths (third heat transfer paths) formed by the second thermally conductive particles 13 arranged in the first direction of the main body 10b (each of the ridges 11a). Therefore, heat transferred to the surface side of the soundproofing member 1a is transferred to the end side of the main body 10b (each of the ridges 11b) in the first direction via the plurality of third heat transfer paths, and the heat of the object can be dissipated to the outside in the surface direction (first direction) of the soundproofing member 1b.

[0049] For example, when the soundproofing material 1b is applied to an object having 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 direction of the object or the maximum width direction of the outer surface, to reduce the accumulation of heat generated from the object in the intermediate region in the surface direction of the soundproofing material 1b, and the heat can be dissipated to the outside in the surface direction (first direction).

[0050] For example, when the 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 amount of heat generated from the object that remains in the intermediate region in the surface direction of the soundproofing member 1b and allowing the heat to be dissipated to the outside in the surface direction (first direction).

[0051] (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.

[0052] The soundproofing member 1a of the first example may be configured to further include the second thermally conductive particles 14 of the soundproofing member 1b of the second example. Specifically, in the soundproofing member 1a, the second thermally conductive particles 14 may be arranged in a row along the extension direction (first direction) of the ridges 11a on the surface of the main body 10a located between adjacent ridges 11a among the plurality of ridges 11a.

[0053] That is, this modified example of soundproofing member 1a includes, in addition to a plurality of 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), a plurality of 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 rear surface to the front surface of soundproofing member 1a via a plurality of 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 a plurality of second heat transfer paths and a plurality of third heat transfer paths.

[0054] A third example of a soundproofing member 1c will be described with reference to Fig. 7. The soundproofing member 1c is the same as the soundproofing member 1a of the first example, the soundproofing member 1b of the second example, or a modified version of the soundproofing member 1a, and further includes a thermally conductive resin film 20 laminated on the surfaces of the main body 10 (10a, 10b) and the plurality of ridges 11 (11a, 11b). In this example, the 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.

[0055] For example, by placing a resin sheet 20 on the inner surface of a molding die (lower die) having recesses corresponding to the shape of each protrusion, 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 protrusions 11.

[0056] 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, so that the surface of the soundproofing member 1c has a planar heat transfer path (fourth heat transfer path) formed by the heat-conductive resin film 20.

[0057] Therefore, when an object covered with the soundproofing member 1c generates heat, the heat is transferred from the back surface to the front surface of the soundproofing member 1c via multiple heat transfer paths (first heat transfer paths) formed by the thermally conductive fillers 12 arranged in the thickness direction, and then dissipated in the surface direction via multiple second heat transfer paths and / or third heat transfer paths as well as a fourth heat transfer path, thereby effectively dissipating the heat in the surface direction. Furthermore, because the surfaces of the main body 10 and the multiple protrusions 11 are covered with the resin film 20, even if the thermally conductive fillers 12, first thermally conductive particles 13, or second thermally conductive particles 14 fall off, they can be prevented from being released to the outside.

[0058] In each of the above embodiments and modifications, 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 the sound absorption characteristics. [Explanation of symbols]

[0059] 1a, 1b, 1c: soundproofing material; 10a, 10b, 10c: main body; 11a, 11b, 11c: protrusions; 12: thermally conductive filler; 13: first thermally conductive particles; 14: second thermally conductive particles; 20: resin film

Claims

1. 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 continuously arranged in the first direction; A soundproofing member comprising:

2. 2. The soundproofing member according to 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.

3. 3. The soundproofing member according to claim 1, wherein the main body portion includes second thermally conductive particles embedded in a surface region located between adjacent ones of the plurality of protrusions and arranged continuously in the first direction.

4. The soundproofing member according to claim 3 , wherein the thermally conductive filler and the second thermally conductive particles are arranged in contact with each other in the surface region.

5. 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:

6. The soundproofing member according to any one of claims 1 to 5, further comprising a thermally conductive resin film laminated on the main body and the plurality of ridges.

7. 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 continuously arranged in the first direction; a thermally conductive resin film laminated on the main body and the plurality of ridges; A soundproofing member comprising:

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 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:

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