JPH1046701A - Soundproof material and execution work method of soundproof material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exhibit a soundproof effect by bringing nonwoven fabrics into close contact with both surfaces of a rubber-like material in which metallic particulates are filled, molding a soundproof material by sticking outer layer base materials to both surfaces of these nonwoven fabrics, and installing this soundproof material by electromagnetic heat treatment. SOLUTION: Nonwoven fabrics 2 and 3 made of an animal, a plant and synthetic resin or the like are adhered to both surfaces of a rubber-like material 1 by filling/ blending magnetic substance metallic particulates in/with a base material of viscoelastic rubber. Electromagnetic wave passable outer layer base materials 4 and 5 such as wood, a synthetic board and a plastic plate are also stuck to both surfaces of these nonwoven fabrics 2 and 3, and a soundproof plate is molded. Next, this soundproof material is butted, and is fixed on a base material, and an electromagnetic heating machine is brought into contact with a surface of a heating area containing a joint part, and electromagnetic heat treatment is performed. The rubber-like material 1 turned into a magnetic substance is heated by this electromagnetic heat treatment, and partially melts, and mutual adjacent rubber-like materials 1 are fused on each other, and are integrally formed. Therefore, a leakage sound in the joint part can be reliably prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproofing material which exhibits a soundproofing effect by being arranged on walls, floors, ceilings and the like, and a construction method for effectively constructing such a soundproofing material.

In recent years, there has been a strong demand that a soundproof room, a soundproof room or a soundproof space (hereinafter referred to as a soundproof space) be formed. For example, to cut off extraneous noise and abnormal noise such as train noise, car noise, aircraft noise, various noise sources in the city area,
This is necessary when a quiet soundproof space is to be constructed in, for example, a school, a house, an office, or the like.

[0005] Contrary to this, a soundproof space is also required in order to prevent sounds from instruments or loudspeakers generated inside the space or noise from mechanical devices from being output to the outside.

[0004] As is well known, sound is a wave motion, which is generally propagated via air, but is also partially transmitted through solids. Therefore, in order to form a soundproof space, walls,
It is necessary to block or attenuate the propagation of sound waves at least in the range of audio frequencies at the boundary surface of a space such as a floor or a ceiling.

[0005] In order to block or attenuate the propagation of sound waves, a technique of arranging a sound absorbing material or a sound insulating material at a portion corresponding to a boundary of a soundproof space is widely adopted. Materials that have a sound absorbing or sound insulating effect include urethane and other plastic foams and rubber materials, and measures to attach these sound absorbing or sound insulating materials to floors, walls, ceilings, etc., which correspond to the boundaries of soundproof spaces. Is widely practiced.

In order to attenuate sound, a boundary layer is formed as a multi-layered structure such as a solid, a gas, a solid, a gas, and the like, and a difference in vibration propagation characteristics of each layer is utilized. , In order to attenuate sound propagation as much as possible. Such a multilayer structure is effective because it can reduce sound leakage caused by vibration propagation of the solid material itself.

[0007] However, such a soundproofing measure using a sound absorbing material or a sound insulating material may require enormous material costs and construction costs depending on the selection of materials and construction, and the effects thereof vary greatly. Occurs.

[0008] It is clear that the sound insulation effect can be enhanced if a vacuum layer is interposed between the solid layers by going one step further. Absent.

Various soundproofing materials have been developed in order to solve such disadvantages. However, when a normal soundproofing material is applied, if a gap is formed at a joint (joint), sound leakage is generated from the gap. there is a possibility. Therefore, it was necessary to form an overlap at the joint or to use a joint member for joints formed separately. Such a construction takes a long time and is expensive.

[0010]

SUMMARY OF THE INVENTION The present invention provides a soundproofing material exhibiting a high soundproofing effect, and provides an advantageous construction method for forming a soundproofing space using such a soundproofing material. That is the task.

[0011]

As shown in FIG. 1, the object of the present invention is to provide a soundproof layer having nonwoven fabrics 2 and 3 which are in close contact with both sides of a rubber material 1 filled with metal fine particles, This problem is solved by a soundproofing material having outer layer substrates 4 and 5 closely contacted on both sides.

The object of the present invention is further solved by a method for installing a soundproofing material by applying an electromagnetic heating process to a region including a joint portion when attaching such a soundproofing material to a boundary of a soundproofing space or after the mounting.

The rubber material 1 in the soundproofing material according to the present invention.
The base material is preferably a viscoelastic rubber, and the metal fine particles to be filled therein may be a spherical body of iron or other magnetic metal. The reason why the rubber base material is filled with metal fine particles in this way is that dispersing and mixing foreign fine particles in an elastic body impedes the propagation of sound waves and can expect a vibration damping effect. In addition, by using a magnetic metal, an advantageous construction method described later can be applied.

The rubber material 1 in the soundproofing material may be a first layer 1A filled with metal fine particles and a second layer 1B containing no metal fine particles, or a multilayer of more than two.

The thickness and / or vibration characteristics of the outer layer substrates 4 and 5 can be selected to be slightly different.
For example, when one side of the soundproof material is invisible to the public such as a floor or a ceiling, one outer layer base material can be omitted, or the rubber material 1 can be a multilayer.

In order to bond the rubber material 1, the nonwoven fabrics 2, 3 and the outer layer substrates 4, 5, the respective components can be bonded using an appropriate adhesive.

Further, the rubber material 1, the nonwoven fabrics 2,
For bonding between the components 3 and the outer layer substrates 4 and 5, the components may be bonded by the adhesive force of viscoelastic rubber. In this case, there is no need to use an adhesive, which is advantageous. For example, the components can be bonded by applying pressure to each other, or by electromagnetically heating the soundproofing material and heating the rubber material 1 located in the middle of the soundproofing material.

When or after installing the soundproofing material on the boundary surface of the soundproofing space, the joint between the soundproofing materials is subjected to electromagnetic heating, and the magnetic metal filled in the rubber material 1 located in the middle of the sandwich structure The particles generate heat.

Due to the high temperature of the magnetic metal fine particles which are electromagnetically heated, the surrounding viscoelastic rubber expands, and the viscoelastic rubber of the adjacent soundproofing material also expands, so that the two adhere to each other. Furthermore, the viscoelastic rubber which expands in this way also enters between the outer layer base materials of adjacent soundproofing materials, and the seams of the soundproofing materials are tightly bonded.

In the soundproofing material according to the present invention, metal particles are filled in a rubbery material for damping vibration. Filling with such metal fine particles is intended to obtain a large damping effect as a whole by mixing substances having different damping characteristics in addition to the damping effect due to the inherent elasticity of rubber. Conventionally, a rubber material mixed with a metal powder is also known. However, if the filling amount is increased, the hardness of the rubber material increases, and there is a disadvantage that the soundproofing characteristics are deteriorated.

In the present invention, the metal fine particles to be filled in the rubber material are desirably spherical or elliptical having a smooth surface. Such a spherical or elliptical body has an effect of not increasing the hardness of the rubber material even if the filling amount is increased. Therefore, the soundproofing effect is maintained.

The material of the metal fine particles is desirably a magnetic material such as iron, nickel, or an alloy containing them. This is because heat is generated by the action of high-frequency lines of magnetic force because electromagnetic heating is used in the method of installing the soundproofing material according to the present invention.

[0023]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a cross-sectional model diagram showing the structure of the embodiment of the soundproofing material according to the present invention. FIG.
The same components as those described above are denoted by the same reference numerals.

In FIG. 2, the rubber material 1 has high viscosity,
A rubber that maintains flexibility, that is, a viscoelastic rubber is used as a base material, and magnetic metal fine particles having an average particle size of about several μm to 1 mm are filled and mixed into the base material at an appropriate ratio. The content of the magnetic metal fine particles is preferably 20% to 40% with respect to the viscoelastic rubber, and preferably about 30%.

If the content of the magnetic metal fine particles exceeds 40%, the rubber material tends to be hardened and the soundproof effect tends to decrease. If the content of the magnetic metal fine particles is lower than 20%, the action of the high-frequency magnetic field lines is reduced. The heat generated by the heat tends to be insufficient.

In this example, spherical iron fine particles were used as the magnetic metal fine particles. The rubber material 1 thus formed exhibits an excellent vibration damping effect, and thus a soundproofing effect, due to the interaction between the elastic modulus different from that of the solid and the metal particles which are almost uniformly dispersed and filled.

Nonwoven fabric 2 provided on both sides of rubber material 1
3 is formed by intertwining or overlapping the same or different types of discontinuous fibers of animal, vegetable, mineral, synthetic resin, etc. by appropriate means.
Thick ones are commercially available. Further, a glass mat based on glass fibers, a nonwoven fabric using glass fibers and synthetic resin fibers in combination, or the like can be used.

FIG. 3 is a plan view of the non-woven fabrics 2 and 3, and the non-woven fabrics 2 and 3 are provided with a large number of openings 21 and 22 of appropriate shapes. The shape of this opening is arbitrary such as a square, a circle, an ellipse, and the number and arrangement are also arbitrary.

The opening is intended to increase the overall strength by directly bonding the rubber material 1 and the outer layer base materials 4 and 5 described later. If there is no such opening, the overall strength is determined depending on the strength of the nonwoven fabrics 2 and 3. Therefore, both outer layer substrates 4 and 5 may be separated from each other in the nonwoven fabric portion, which may cause inconvenience.

The outer layer base materials 4 and 5 are plate-like materials having strength and appearance suitable for forming a boundary of a soundproof space, that is, floors, walls, ceilings, and the like. Can be. These may be in the form of a veneer, a plywood, a laminated wood board, a wood chip board obtained by hardening wood chips with a resin or an adhesive. Although it does not affect the effects of the present invention, in practice at least the outer layer substrate 4,
It is convenient if any one of the surfaces 5 is a cosmetic surface.

It is desirable that the outer layer base materials 4 and 5 transmit electromagnetic waves, and those that do not transmit electromagnetic waves such as ceramics are not suitable. This is because electromagnetic heating is used in the method of installing the soundproofing material according to the present invention, and thus the electromagnetic waves need to reach the rubber material 1 disposed inside the outer layer base material.

In this case, it is desirable that the outer layer substrates 4 and 5 have slightly different thicknesses and / or vibration characteristics. With such considerations, it is possible to effectively prevent a coincidence effect in which a kind of resonance phenomenon occurs between the outer layer substrates 4 and 5.

FIGS. 4A, 4B and 4C show examples of the construction of the rubber material 1. FIG. FIG. 1A shows a single layer in which metal fine particles are dispersed and filled in the entire viscoelastic rubber substrate. It is desirable that sufficient flexibility is maintained even when such metal fine particles are dispersed and filled.

FIG. 2B shows a rubber material 1 having a two-layer structure in which a first layer 1A filled with fine metal particles and a second layer 1B not filled with fine metal particles are overlapped. . With such a configuration, since the first layer 1A and the second layer 1B have different attenuation characteristics, the overall attenuation effect can be enhanced.

FIG. (C) shows that the rubbery layer is composed of 1C and 1D.
And a three-layer structure in which another material layer 1E is interposed between 1C and 1D. The other material layer 1E can be made of, for example, a nonwoven fabric or a material having other properties. In this way, the structure can be adopted when a particularly high soundproofing effect is required. The rubber layer can be various layers depending on the mounting location of the soundproofing material, the required level of the soundproofing effect, and the like.

In the configuration as shown in FIG. 2, the bonding between the constituent elements is performed by taking the surface state of the rubber material 1 into consideration so that the rubber material 1 and the outer layer base materials 4 and 5 are bonded to the nonwoven fabrics 2 and 3. Are directly bonded through the openings 21 and 22. In this case, there is no need to use an adhesive, which is advantageous. For example, the components can be bonded by applying pressure to each other, or by electromagnetically heating the soundproofing material and heating the rubber material 1 located in the middle of the soundproofing material. Further, by using a hot-melt adhesive or another adhesive for one or two or more components, for example, the nonwoven fabrics 2 and 3, it is possible to secure stronger adhesion.

FIG. 5 is a sectional model diagram showing an embodiment in which the soundproofing material according to the present invention is attached to a boundary of a soundproofing space, for example, a wall surface.

The sound insulating materials 10 and 1 formed in unit dimensions
While joining the end faces of each other to form joints 12,
The fixing member 14 is appropriately attached to the wall-mounting base material 13,
For example, nails, wood screws, and other fixing brackets are used to sequentially fix them. Even in such a fixed state, it is possible to expect more effects than the construction using the soundproofing material according to the related art.

Further, as described above, the plurality of soundproof materials 10, 1
The electromagnetic heating machine EM can be brought into contact with the heating area H including the joint portion where the joints 1 are abutted and fixed to perform the electromagnetic heating process.

The magnetic metal particles 11 are filled by the electromagnetic heating treatment, and the rubber material portion which has been entirely converted into a magnetic material generates heat and partially melts, and the adjacent rubber materials 1 are fused together. . By applying such electromagnetic heating treatment to each joint portion, the rubber materials 1 are fused and integrated with each other. Therefore, sound leakage at joints, which tend to be blind spots in conventional soundproofing work, is reliably prevented.

If the electromagnetic heating treatment of the joint portion is sufficiently performed, the rubber material 1 is sufficiently melted, so that the rubber material is eluted into the gap between the adjacent outer layer base materials. It will be excited.

As a result, the space between the two outer layer base materials adjacent to each other is reduced by the eluted rubber material, and the rubber material functions as a cushion between members having rigidity, so that an improvement in soundproofing effect can be expected. In other words, since it is possible to visually confirm that the rubber material is also eluted in the gap between the adjacent outer layer base materials, it is easy to determine whether or not the rubber materials are securely fused inside. You can check.

The electromagnetic heater E used for such construction
The structure, output and the like of M are not particularly limited, but the main part of the electromagnetic cooker formed so as to heat a magnetic pot is, for example, in a form that can be operated by one hand, and a high frequency magnetic field line is output from the output part. Is output. As a power source, a commercial power source or an output of a portable generator can be used.

By applying such a construction method, there is no need for a seam assisting member for coping with joints or construction work requiring extraordinary skills or processing time, and the processing time and cost can be significantly reduced. it can.

[0045]

According to the soundproofing material of the present invention, a high soundproofing effect can be expected due to the soundproofing and vibrationproofing effect of the soundproofing layer means composed of the rubber material and the nonwoven fabric interposed between the outer layer base materials. This rubbery material is, for example, a viscoelastic rubber base material made of natural rubber or other rubber, and includes a metal (iron) which is completely different from vibration and sound wave transmission and has a smooth surface. ) The particles are filled and maintain flexibility. Therefore, the transmission characteristics of vibration and sound waves are improved, and a higher soundproofing effect than conventional soundproofing materials is exhibited.

Further, according to the method for installing a soundproofing material of the present invention, the soundproofing material is fixed to the mounting base material at the boundary surface of the soundproofing space, and then the joint is subjected to electromagnetic heating treatment. Due to this electromagnetic heating, the fine metal particles in the rubber material generate heat, and the surrounding rubber base material is partially melted.

Therefore, the rubber materials of the adjacent soundproofing materials are fused together, a wide range of rubber materials are integrated, and sound leakage from the adjacent portion is prevented. Further, by performing a sufficient electromagnetic heating treatment, the rubber material enters the joint portion of the outer layer base material. As a result, the air gap is greatly reduced and the function of the cushion is exhibited,
Good soundproofing effect is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional model diagram showing a basic configuration of a soundproofing material according to the present invention.

FIG. 2 is a cross-sectional model diagram showing a configuration of an embodiment of a soundproofing material according to the present invention.

FIG. 3 is a plan view showing a configuration example of a nonwoven fabric of an embodiment of the soundproofing material according to the present invention.

FIG. 4 is a cross-sectional model view showing examples of a single layer, two layers, and three layers of a rubber material according to the present invention.

FIG. 5 is an explanatory sectional view showing a construction state when a soundproof space is formed by the soundproof material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber material 2, 3 Nonwoven fabric 4, 5 Outer layer base material 10, 11 Soundproof material 12 Joint part 13 Mounting base material 14 Fixing member 21, 22 Opening H Heating area M Melting part EM Electromagnetic heater

Claims (7)

[Claims] 1. A soundproof layer having nonwoven fabrics (2) and (3) in close contact with both sides of a rubber material (1) filled with metal fine particles, and an outer layer base material (4) in close contact with both sides of the soundproof layer. ) And (5). 2. The soundproofing material according to claim 1, wherein the metal fine particles are fine particles made of a magnetic metal and having a smooth surface. 3. The soundproofing material according to claim 1, wherein the rubbery material (1) is made of a viscoelastic rubber as a base material. 4. The soundproofing material according to claim 1, wherein the thickness and / or vibration characteristics of the outer layer substrates (4, 5) are selected to be slightly different. 5. A method of bonding the rubber material (1), the nonwoven fabrics (2, 3), and the outer layer base materials (4, 5) using an adhesive as appropriate. The soundproofing material according to any one of claims 1 to 4, wherein: 6. Adhesion of viscoelastic rubber for adhesion between each element of the rubber material (1), the nonwoven fabrics (2, 3) and the outer layer base materials (4, 5). The soundproofing material according to any one of claims 1 to 4, wherein: 7. A soundproofing material including a rubber material filled with magnetic metal fine particles is fixedly attached to a mounting base material at a boundary surface where a soundproofing space is to be formed, and abutting portions between adjacent soundproofing materials are provided. And performing electromagnetic heating until the rubber material is at least partially fused to a region including: