JPH0637099B2 - Vibration control panel - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vibration damping and soundproofing panel which can be applied to an inner wall material or an outer wall material for construction, which has excellent vibration damping characteristics, sound insulation and sound absorbing characteristics.

(Prior Art) As a soundproof material for a house or a building, in the case of a double-structured outer wall material or inner wall material, a high specific gravity type sound insulation material is attached to a plywood or metal plate that is a substrate, and Layering sound absorbing materials such as glass wool and rock wool on top,
Only sound absorbing material such as glass wool is inserted to improve the low frequency resonance transmission unique to the double structure wall and the coincidence effect.

(Problems to be solved by the invention) However, the conventional structure does not sufficiently improve the low-frequency resonance transmission and the coincidence effect peculiar to the double structure wall, and the impact sound from the upper floor is transmitted to the downstairs through the wall. There was a problem.

In the case of a sandwich plywood in which an elastic body is laminated between two plywoods, due to the elasticity, a low-frequency resonance transmission phenomenon occurs in the midrange, which is important for sound insulation, which is inconvenient. Further, if the plywood boards are connected by a core material such as a highly rigid honeycomb core, the overall rigidity is increased, and a decrease in TL due to the coincidence effect occurs in the middle frequency range, which also deteriorates the sound insulation characteristics.

(Means for Solving the Problems) In order to solve the above problems, the present invention has a closed-cell-body-provided base material (A) utilizing the vibration damping property of an air layer, and has excellent vibration damping properties and compression properties. A crosslinked viscoelastic body-containing sheet with a crosslinked viscoelastic body (B) in which the spaces of the closed cell bodies of the closed cell body-disposed substrate (A) are filled with the crosslinked viscoelastic body (B). A vibration damping and soundproofing board in which a plate-like restraint material (D) is laminated on one surface of a base material (C) and a sound insulating sheet or sound absorbing sheet or a sound insulating sheet and a sound absorbing sheet are laminated on the other surface. E) is characterized by a vibration-damping and sound-proof panel having a double structure such that the sound absorbing sheet surface or the sound insulating sheet is inside.

(Operation) In the vibration-damping and soundproof panel of the present invention, the above sound-insulating material is a self-adhesive flame-retardant sound-insulating sheet having a thickness of 1 mm or less, which is composed of a sheet having a penetration of 20 to 200 and a reinforcing base material.

In the vibration-damping and soundproof panel of the present invention, a perforated plate having an opening ratio of the constraining material of 3 to 40%, a plate thickness of 0.5 to 20 mm, and an area of one perforated part of 0.003 to 3.5 cm ² is used. A restraint material is preferable, and a net having a diameter of 0.1 mm to 20 mm is inserted between the perforated plate and the sheet base material (C) containing the crosslinked viscoelastic body closed cell body to form a vibration damping and soundproof panel. Is good.

This composite hollow double-layered soundproof panel can significantly reduce the transmission of solid propagating sound in the wall body and improve the occurrence of the deterioration of the sound insulation characteristic of the hollow double-structured wall. There are features.

In the vibration-damping and sound-proofing panel of the present invention, by using the self-adhesive flame-retardant sound-insulating sheet, it is excellent in flexibility, and since it has adhesiveness, it is a sticking workability, is excellent in dimensional stability, and is a high specific gravity sheet. However, since the thickness is 1 mm or less, it has excellent soundproofing properties, and has the major feature that the weight of the wall itself can be reduced.

In the vibration damping and soundproofing panel of the present invention, the aperture ratio of the restraint material is 3 to 40%, the thickness of the restraint material is 0.5 to 20 mm, and the area of one perforated portion is 0.003 to 3.5 cm ^2. By using it as a material, it is possible to improve the frequencies in the low and middle frequencies, and insert a mesh with a diameter of 0.1 mm to 20 mm between the perforated plate and the sheet base material containing the closed cell with the crosslinked viscoelastic body. This makes it possible to further improve the vibration damping and soundproofing effect in the low and mid frequencies.

The double structure wall of the vibration damping and soundproofing panel of the present invention having the above-described structure has excellent performance of soundproofing characteristics, so that it is possible to reduce the thickness of the wall body, and it is possible to reduce the weight. The number of members in the body structure can be reduced, and the cost can be reduced during transportation or construction.

(Example) With reference to the drawings, an embodiment of the double structure vibration damping and soundproofing panel of the present invention will be described below.

1 to 6 show a sectional structure of a vibration damping and soundproofing panel of the present invention, in which 1 represents a sheet base material containing a closed cell with a crosslinked viscoelastic body, and in the present invention, this sheet base material Reference numeral 1 is composed of a closed-cell body-disposed base material in which the spaces between the closed-cell bodies are filled with a crosslinked viscoelastic body. 1
20-200 mm with a composite board in which the plate-like restraint material 2 is laminated on one surface and the laminate of the sound insulation sheet 3 and the sound insulation sheet 4 is attached on the other surface so that the sound absorbing material surface is on the inside. Thick air layer 5
Is provided and sequentially laminated to form a vibration damping and soundproof panel.

FIG. 2 shows a laminated body of a sheet-like base material 1 with a crosslinked viscoelastic body and a plate-like restraint member 2 laminated on one surface of the sheet base material 1, and a sound insulating sheet 3 and a soundproof sheet 4 on the other surface. An air layer 5 is provided so that the surface of the sound absorbing material is the inside, and the sound insulating sheet 3, the sheet base material 1, and the restraining material 2 are sequentially laminated.

The one shown in FIG. 3 is the one shown in FIG. 2 in which the sound insulating sheet 3 disposed on the other side is omitted and the air layer 5 is widened.

The one shown in FIG. 4 is the one shown in FIG. 3 in which the sheet base material 1 arranged on the other side is omitted and the air layer 5 is further widened.

As shown in FIG. 5, the perforated plate 6 as a restraint material is attached to one surface of the above-mentioned sheet base material 1, and the sound insulating sheet 3 and the soundproof sheet 4 are laminated on the other surface of the sheet base material 1. The sound-damping and sound-proofing board is formed by sequentially stacking the sound-absorbing sheet 4, the sound-insulating sheet 3, the sheet base material 1 and the perforated plate 6 through the air layer 5 of 20 to 200 mm. It is a thing. Here, the order of the sound insulation sheet 3 and the sound insulation sheet 4 may be reversed, and the sound insulation sheet 3 may be arranged so as to be attached to the inside of the sheet base material 1.

As shown in FIG. 6, a perforated plate 6 serving as a restraint member 2 is attached to one surface of a sheet base material 1 via a mesh 7, and a sound insulating sheet 3 and a sound insulating sheet 4 are attached to the other surface. A vibration and soundproof boat is provided, an air layer 5 of 20 to 200 mm is provided, and a soundproof sheet 4, a sound insulating sheet 3, and a sheet base material are further laminated, and a perforated plate 6 is further inserted on the other surface by interposing a mesh 7. The mode which joined the perforated board 6 and comprised the vibration damping and soundproof panel is shown.

In carrying out the present invention, as shown in FIGS.
The composite plate having the laminated structure of the soundproof sheet 3 and the soundproof sheet 4 on one side may be provided only on the sheet base material 1 on one side, and on the other side, the restraint member 2 alone or the closed cell with the crosslinked viscoelastic body. A vibration damping and soundproof panel may be formed by stacking a laminated body of the body-containing sheet 1 and the restraining material 2 or further a sound insulating sheet 3.

Next, the wall member will be described step by step.

Specific examples of the binding material, plywood, compressed paper, plastic plate, metal foil plate, party board, wood chip cement plate, fiber board, pulp cement plate, flexible plate, soft flexible plate, large flat plate, asbestos cement plate,
Asbestos cement perlite board, asbestos cement calcium silicate board, gypsum board, etc. can be used regardless of the presence or absence of decorative treatment on the surface as long as they are plate-shaped, but the purpose of reducing the total thickness of the wall material If it is important, a thin plate is desirable. In order to further improve the soundproofing properties, the restraint material has an opening ratio of 3 to 40% and the area of one part of the perforated part is 0.00
It is desirable that it is 3 to 3.5 cm ² .

The crosslinked viscoelastic material referred to in the present invention is a liquid at room temperature,
Moreover, the cured product after reacting at room temperature retains its shape even when heated to 80 ° C, and the hardness is 20% under the standard of Japan Rubber Association S.
The C-type hardness tester shown in RIS-0101 satisfies the condition of 50 or less. Also, as a matter of course, it is possible to further increase the curing rate by heating a substance that reacts at room temperature. Utilizing this property, the panel of the present invention is heated to improve the production efficiency. May be. Examples of the reactive substance that can satisfy the above conditions include the combination of a liquid rubber having a functional group shown in Table 1 and a crosslinking agent.

Considering the ease of controlling the curing rate at room temperature reactivity, the cost, the availability, etc., these have a hydroxyl group at the terminal, and the main chain is polybutadiene, hydrogenated polybutadiene, polybutadiene- It is desirable to use nitrile, polybutadiene-styrene, isoprene or the like, polyether polyol, polyester polyol, urethane acryl polyol, aniline derivative polyol or the like alone or in combination.

Further, as the curing agent for the reactive substance, an isocyanate curing agent is suitable, and it is necessary to have two or more isocyanate groups per molecule.

Specific examples thereof include toluylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and a prepolymer having a terminal isocyanate group,
They can be used alone or in combination. Further, the isocyanate curing agent can be used as a mixture with a plasticizer due to the problem of the blending ratio and / or the viscosity, but it is necessary that the plasticizer is dehydrated and does not react with the isocyanate compound. Is.

Although it is possible to obtain a crosslinked viscoelastic material that can satisfy the present invention by combining only the essential components for carrying out the above room temperature reaction, various additives may be further added in terms of cost, workability and physical properties. A wide range of stable crosslinked elastic materials can be obtained by adding them.

Examples of the additive include a plasticizer, a filler, a bituminous substance, a tackifying resin, an antiaging agent, an antifungal agent, a flame retardant, a catalyst, a surfactant, and a coupling agent.

The plasticizer is blended for the purpose of adjusting viscosity, adjusting workability, adjusting physical properties of the crosslinked viscoelastic body, imparting flame retardancy and the like.

Specific examples of the plasticizer include naphthenic oil, paraffinic oil, aromatic oil, castor oil, cottonseed oil, pine oil, tall oil, phthalic acid derivative, isophthalic acid derivative, adipic acid derivative, maleic acid derivative,
Some liquid rubbers do not contain a functional group, and can be used alone or in combination.

When flame retardancy is required, halogen compound type and phosphorus compound type plasticizers can be used alone or in combination. As bituminous materials, there are straight asphalt, blow asphalt, tar and the like, which can be modified in advance with a tackifying resin, a plasticizer or the like in order to obtain a desired crosslinked viscoelastic body.

As the tackifying resin, natural resin, rosin, modified rosin, derivatives of rosin and modified rosin, polyterpene resin, terpene modified product, aliphatic hydrocarbon resin, cyclopentadiene resin, aromatic petroleum resin, phenol resin, An alkylphenol-acetylene-based resin, a xylene resin, a coumarone-indene resin, a vinyltoluene-α-methylstyrene copolymer and the like can be used alone or in combination.

The filler is effective in improving vibration damping properties, temperature shielding properties, and flame retardancy, and can be used for the purpose of adjusting the compounding ratio of the main agent / curing agent, adjusting the viscosity, and reducing the compounding cost. What is generally used for paints can be used.

Specific examples thereof include mica, graphite, flint, talc, scale-like inorganic powder such as clay, ferrite, metal powder, barium sulfate, high specific gravity filler such as lithopone, calcium carbonate, finely divided silica, magnesium carbon carbonate,
A general-purpose filler such as aluminum hydroxide or asbestos can be used alone or in combination. Further, antimony trioxide, borax, etc. can be used for the purpose of flame retardancy. Other additives include anti-aging agents, catalysts, pigments, surfactants,
Coupling agents, antifungal agents and the like can be mentioned, but these can be added if necessary.

Next, the closed-cell body-provided base material will be described.

Base material with closed cells is 0.005 cc to 10 cc per unit
The closed cells having a volume of are connected innumerably at regular intervals or at irregular intervals via a film, thread, foam sheet, plate, sheet, adhesive, adhesive, etc. The term "base material" is shown in FIG. 7 and FIG.

The material of the closed cell bag is polyethylene, polypropylene, ethylene-vinyl acetate copolymer, vinyl chloride,
Rubber such as vinylidene chloride, nylon, polyester, butyl rubber, natural rubber and chloroprene may be used alone or laminated, or may be laminated with non-woven fabric or paper. The thickness of the bag portion is preferably 6 mm or less, more preferably 2 to 4 mm.

The shape of the convex portion of the closed cell body may be any of a cylindrical shape, a prism shape, a spherical shape, a hemispherical shape, an elliptical shape, and the like, as long as the closed cell body is formed.

It is desirable that the ratio of the volume of the crosslinked viscoelastic body to the volume of the air portion of the closed cell when the sheet containing the closed cell with the crosslinked viscoelastic body as a base material is 2: 8 to 8: 2. Volume of crosslinked viscoelastic body: volume of air part of closed cell body = 2: 8 If the volume of the crosslinked viscoelastic body is smaller than that, the cost of raw materials increases and the resilience tends to deteriorate.

A sheet consisting of a sheet with a penetration of 20 to 200 and a reinforcing base material has a thickness of 1
A self-adhesive flame-retardant thermal insulation sheet of mm or less is a self-adhesive flame-retardant thermal insulation sheet that is 30 to 300 μ per 100 parts by weight of synthetic rubber.
It is a temperature barrier material consisting of 100 to 500 parts by weight of metal powder, 50 to 150 parts by weight of tackifier, and 10 to 100 parts by weight of flame retardant and having a penetration of 20 to 200 and a reinforcing base material.

The sound absorbing material used in the present invention includes glass wool, rock wool, felt, urethane foam and the like, and these can be freely selected according to the purpose.

Explaining the material and the like of the reticulate material having a diameter of 0.1 mm to 20 mm used in the present invention, as the material, polyethylene, polystyrene, polypropylene, polystyrene, vinyl chloride,
A fibrous material composed of ethylene-vinyl acetate copolymer, nylon, polyester, glass fiber, vinylon, rockwool, cotton, hemp, etc., in which the vertical and horizontal threads are heat-sealed, or attached with an adhesive. A woven fabric or the like of the combined product is used.

Next, the present invention will be described with reference to Examples and Comparative Examples. These are summarized in Table 2 and Table 3.

The examples and comparative examples shown in Table 2 were prepared according to the formulation prescriptions shown in the table, the main agent and the curing agent were mixed in the ratio shown in the table, and the space of the closed cell body-provided base material was filled, and the mixture was kept at room temperature. Cured. On the other hand, hardness, shape retention at 80 ° C, and room temperature reactivity were checked by the following methods.

(1) Hardness A base material was prepared based on the formulation shown in Table 2, and the amounts of the curing agent and base agent shown in Table 2 were weighed, mixed, and then subjected to mold release treatment.
After pouring it into a 12 mm × 50 mm × 50 mm mold and allowing it to react at room temperature, it was cured at room temperature for 7 days and at 50 ° C. for 7 days, and then the hardness was measured with a C-type hardness meter specified by the Japan Rubber Association Standard SRIS-0101.

(2) 80 ° C shape retention The material obtained by the method shown in (1) was removed from the mold, release paper was applied to the upper and lower surfaces, a load of 50 g was applied, and the material was left standing at 80 ° C for 24 hours, then The sample was unloaded, allowed to stand at room temperature, and visually judged by the magnitude of deformation after 24 hours.

Circles with sharp edges and almost no deformation,
Those with no sharp edge and those with large deformation were marked with x.

(3) Room temperature reactivity (1) Mix the mixture of the main agent and the curing agent in a 100 cc cup, leave it at room temperature, and after 1 day, mark the whole gelled or hardened circle. And the other ones are marked with X.

Next, examples and comparative examples relating to the wall configuration shown in Table 3 will be described.

The crosslinked viscoelastic materials used in Examples and Comparative Examples are those shown in Table 2, and Examples 1 and 2 and Comparative Example have a closed cell volume of
A closed cell body-containing sheet with a crosslinked viscoelastic body was prepared using a closed cell body-disposing substrate having a volume ratio of 0.3 cc of the crosslinked viscoelastic body to the closed cell body of 5: 5. In Example 3, the crosslinked viscoelastic body was the same as those in the other Examples 1, 2 and Comparative Example, the volume of the closed cells was 3 cc, and the volume ratio of the crosslinked viscoelastic body to the closed cells was 4: 6. A closed-cell-containing sheet with a crosslinked viscoelastic body was prepared using the closed-cell-body-provided base material.

The heat insulation performance was measured according to JIS A1416 by the method shown in FIG.

Fig. 9 shows the method of measuring sound transmission loss in the laboratory of JIS A1416. The sound receiving device is a precision sound level meter 10 to which a 1/3 octave analyzer 11 and a high speed recorder 12 are connected. The total 10 is connected to the sound source side microphone 15 in the sound source room 13 and the sound receiving side microphone 16 in the sound source room 14, and the sound source side microphone 15 is opposed to the speaker 17 provided in the sound source room 13.
A precision sound level meter through the noise field generator 18
It is connected to 10.

With such a device, the average sound pressure level is measured under the conditions specified in JIS A1416, the sound absorption force of the sound receiving reverberation room is measured, the sound transmission loss is calculated, the sound pressure level fluctuation is inspected, and the sound transmission loss of the standard specimen is measured. The measurement is performed.

The symbols for the cross-sectional view of the wall structure are as follows.

A. Plywood 3.0t B.P. Perforated plate Perforated gypsum board C. Reticulate material D. Closed cell body-containing sheet base material with crosslinked viscoelastic body E. Sound insulation sheet F. Sound absorbing sheet (glass wool) 12.0t G.I. Air Layer The examples and comparative examples shown in Table 2 are examples of the crosslinked viscoelastic body used in the present invention. Table 2 shows that Examples 1 and 2 are formulation examples that can achieve the object of the present invention, but Comparative Example 1 shows that the hardness deviates from the claimed range and the sound insulation performance is not sufficient.

The examples and comparative examples shown in Table 3 are examples showing cross-sectional views of the wall structure of the present invention.

Example 1 is a 65 mm air layer composed of a board in which a plywood that is a constraining layer is attached to one surface of a sheet base material containing a closed cell with a crosslinked viscoelastic material and a sound insulating material and a sound absorbing material are laminated on one surface. It shows that the sound insulation performance and the vibration damping performance are good even though the total thickness is 100 mm.

Example 2 has an aperture ratio of 1.1 cm ² perforated portion as a restraint material.
The rest of the configuration is the same as in Example 1 except that 6.0% gypsum board was used. The vibration damping performance is the same as that of the first embodiment, indicating that the sound insulation performance is further improved.

In the third embodiment, in addition to the structure used in the second embodiment, a diameter of 2 mm is provided between the perforated plate and the sheet base material containing the closed cell with the crosslinked viscoelastic body.
It is a panel formed by inserting a net-like material, and the sound insulation performance is further improved.

In Example 4, the sound insulating sheet used in Example 3 was 2 mm (area density: 3.
4 kg / m ² ) with a 0.5 mm self-adhesive sheet, a weight reduction of about 2 kg / m ² can be achieved. Equivalent performance is obtained.

Comparative Example 1 shows the case where the closed base material-containing sheet base material with a crosslinked viscoelastic body is not provided.

Although the sound insulation performance is not bad in Comparative Example 1, there is a problem in the vibration damping performance, and when used in combination with the wooden vibration damping floor material, vibration is transmitted from the wall material and the function of the vibration damping floor is not sufficiently exerted. .

That is, the present invention can improve the deterioration of sound insulation performance due to resonance, which is a drawback of the hollow double-structured wall, and further uses a perforated plate as a restraint material, or a restraint material and a closed base material containing a crosslinked viscoelastic body-containing sheet substrate. It is possible to further improve the sound insulation performance by inserting a reticulated material between the and, and further, the greatest feature of the present invention is that the cross-linked viscoelastic body-containing closed-cell-containing sheet base material is used. Since it is possible to prevent the propagation of vibration from the upper and lower floors, which was a drawback of conventional wall materials, and it is possible to reduce the weight, it is possible to reduce the structure of the wall and it is also economically advantageous. It has characteristics.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of an embodiment of the present invention, in which a plate-like restraint material is provided on one surface of a closed base material containing closed cell body with a crosslinked viscoelastic body and a sound insulation sheet is provided on the other surface. This is a vibration-damping and sound-proof panel having a double structure in which an air layer is provided so that the surface of the sound-absorbing sheet is on the inside. FIG. 2 is a sectional view showing the configuration of one embodiment of the present invention, in which a perforated plate is provided on one surface of a closed base material containing a crosslinked viscoelastic body and a sound insulating sheet and a sound absorbing sheet on the other surface. Is a vibration-damping and sound-proof panel having a double structure in which an air layer is provided so that the surface of the sound-absorbing sheet is inside. FIG. 3 is a structural cross-sectional view of one embodiment of the present invention, showing a vibration damping and soundproof panel in which a mesh is inserted between a perforated plate and a sheet base material containing a closed cell with a crosslinked viscoelastic body. is there. FIG. 4 is a sectional view showing the construction of an embodiment of the present invention, which is a vibration damping and soundproof panel in the case where the sound absorbing sheet is not used in the one vibration damping and soundproofing board of FIG. FIG. 5 is a sectional view showing the configuration of an embodiment of the present invention, which is a vibration damping and soundproofing panel when the sound insulating sheet of one of the vibration damping and soundproofing boards of FIG. 4 is not used. FIG. 6 is a sectional view showing the construction of an embodiment of the present invention. One of the vibration damping and soundproofing boards shown in FIG. 4 is a composite panel composed of a single layer board. FIG. 7 and FIG. 8 are perspective views of a closed base material-containing sheet base material with a crosslinked viscoelastic body. FIG. 9 is an explanatory diagram of an apparatus for measuring the sound insulation performance. 1 ... Sheet base material containing a closed cell with a crosslinked viscoelastic body 2 ... Restraint material which is a plate-like material 3 ... Sound insulation sheet, 4 ... Sound absorption sheet 5 ... Air layer, 6 ... Perforated plate 7 ... … Reticulated object, 8 …… Closed cell body 9 …… Crosslinked viscoelastic material, 10 …… Precision noise meter 11 …… 1/3 octave analyzer 12 …… High-speed recorder, 13 …… Sound source room 14 …… Receiver Sound room, 15 …… Sound source microphone 16 …… Sound receiving microphone, 17 …… Speaker 18 …… Noise field generator

Claims (6)

[Claims] 1. One of the closed-cell-containing sheet base materials (C) with a crosslinked viscoelastic body in which the spaces of the closed-cell bodies of the closed-cell body-provided base material (A) are filled with a crosslinked viscoelastic body (B). Of the sound-absorbing sheet (E), the plate-shaped body is laminated as a restraint material (D) on one side of the surface, and the sound-insulating sheet or sound-absorbing sheet or the sound-insulating sheet and the sound-absorbing sheet are stacked on the other surface. Alternatively, a vibration-damping and sound-proof panel having a double structure with an air layer of 20 to 200 mm thick so that the surface of the sound-insulating sheet is on the inside. 2. The closed base material-provided base material (A) per unit
Condensation of 0.005 cc to 10 cc of gas to form closed cells The convex part is heat-sealed, adhesively bonded to film-like material, foam sheet-like material, sheet-like material, cloth-like material, thread-like material, and thread-like material The vibration-damping and sound-proof panel according to claim 1, which is a base material having a structure in which it is connected innumerably at regular intervals or at irregular intervals by utilizing the forced fixation by. 3. The crosslinked viscoelastic body (B) undergoes a curing reaction at room temperature, the product after the curing reaction retains its shape even when heated to 80 ° C., and has a hardness of 20 ° C. The vibration-damping and sound-insulating panel according to claim 1, which is a substance satisfying the three conditions of being 50 or less in a C-type hardness tester defined by Japan Rubber Association Standard SRIS-0101. 4. The vibration-damping and sound-insulating panel according to claim 1, wherein the sound-insulating material is a self-adhesive flame-retardant sound-insulating sheet having a penetration of 20 to 200 and a reinforcing substrate and having a thickness of 1 mm or less. 5. The aperture ratio of the plate-like restraint material (D) is 3 to 40%.
The plate thickness is 0.5 to 20 mm, and the area of one hole is 0.
The vibration damping and soundproof panel according to claim 1, wherein a perforated plate having a size of 003 to 3.5 cm ² is used. 6. A diameter of 0.1 mm between a perforated plate which is a plate-like restraining member (D) and a sheet base material (C) containing a crosslinked viscoelastic body.
The vibration damping and soundproof panel according to claim 1 or 5, wherein a 20 mm mesh is inserted.