JP3013023B2 - Sound insulation components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a sound insulation component which is effective in reducing floor impact noise transmitted from a floor above a reinforced concrete building or a wooden building, an apartment, or a general house to a floor below. It has a high performance to mitigate not only the light impact sound of the floor but also the heavy impact sound,
Further, the present invention provides a member for constructing a sound insulating floor which is easy to construct and has high economic efficiency.

[0002]

2. Description of the Related Art The floors of buildings, condominiums, and general houses have different structures, but noise transmitted downstairs is a problem. A light floor impact sound such as the slick sound of a person wearing shoes walking on the upper floor, a sound of a relatively light object falling on the upper floor, and a lower floor when a child etc. jumps on the upper floor There is heavy floor impact sound such as transmitted sound. In order to prevent these floor impact sounds from being transmitted to the downstairs as noise, measures have been taken using various floor structures or combinations of various floor components. For example, in a wooden house building, “push-pull” wood is placed at 909 mm intervals on beams, and crossed with “joda (neda)” wood at 303 mm intervals to form the foundation of the floor. A floor base such as a control panel is attached to the floor, and the floor is constructed using folding, carpet, flooring, etc. as a finishing material. Rubber sheets, polyvinyl chloride (PVC) sheets, etc. are placed between the floor base plate and the finishing material. A sheet or a combination of two or more types of insulation boards made by solidifying chips of foamed polyurethane or foam rubber and making them into a plate shape, or even a board made of fine wood fibers solidified in a plate shape Alms to mitigate the impact sound transmitted downstairs.

In a concrete building such as an apartment, the downstairs and the upstairs are separated by a concrete slab, that is, a slab. When a floor material is applied thereto, the same sound insulating component as described above is applied as an intermediate layer. ing. However, with these sound insulation components, lightweight floor impact sound can be effectively sound-insulated, but heavy floor impact sound can be sound-insulated to a certain level, but it is difficult to raise the effect further. . Various studies have been made to solve this problem even in such a situation. Since sound transmission is slower in gas than in solids, a so-called double floor is used in which a leg is set up for each fixed area of the floor material, the entire floor is raised in the air, and a space of about 5 cm is left between the floor and the slab. The structure is also adopted.

[0004]

In order to block such floor impact noise, it is becoming increasingly important in current buildings, condominiums, and residential buildings. Under such circumstances, lightweight floor impact sound can achieve its purpose to a high level with a relatively simple structure and relatively low cost, but heavy floor impact sound is a sound different from light floor impact sound. Even if the sound insulation effect of the impact sound is high, it is not always possible to achieve a high level of the sound insulation of the heavy impact sound, and the sound insulation of the heavy impact sound is a higher level sound insulation technology. For this reason, it is inevitable to combine various types of sound insulation components or to adopt a more complicated structure such as the above-mentioned double floor.

[0005] For this reason, the cost of these sound insulating components occupying the floor material is high, and the complexity of the construction is also overlapped, so that the overall cost is high. Under such circumstances, there is a need for an economical sound insulation component material that has a high sound insulation effect for heavy floor impact sounds, can simultaneously absorb light weight floor impact sounds, and has a simple structure. The present invention has been made to solve these problems.

In recent years, carpeting, which has been widely used on condominiums and general home floors, has been shunned by the problem of dirt and mites, and has moved to use wood flooring and other materials. This is spurring the trend for noise insulation. Wooden flooring materials such as flooring are more luxurious materials. However, compared to carpets, the sound is more likely to be heard downstairs, and if these materials are easily replaced, floor noise is a problem. The present invention also solves the needs of such an era.

[0007]

It is well known that there are "sound absorption" and "sound insulation" as methods for stopping sound transmission. Sound absorption is the absorption of sound energy. A sound-absorbing material is placed in the passage of sound, and the sound that strikes it disappears as heat. As these sound absorbing materials, materials having a large number of holes and gaps through which air can pass are effective.For example, a large number of holes or slits are formed in glass wool, open-cell urethane foam, fiberboard, or plate-like material. Are used.

On the other hand, sound insulation is to block the transmission of sound, and the level of sound passing through one material is represented by the level of sound called transmission loss, and a material having a larger transmission loss blocks sound. . It is theorized that the mass law holds for this sound insulation performance, and the larger the mass, the higher the sound insulation effect. However, some types of sound are not limited to this mass rule, and it has been found that resistance to bending vibration of a material and some elasticity are necessary.

The present inventors have modified asphalt, which is a main component of a plate-like material, which has been conventionally manufactured and used as a joint plate of a concrete structure, with a specific polymer to have a specific viscoelasticity. Has a resistance to bending vibration on the sound insulation surface, and is effective as a binder capable of forming a high-mass material into a good plate shape. Furthermore, if a plate-shaped product can be manufactured in such a production form, any material having a relatively large mass can be mixed with the modified asphalt to form a product by performing only a small pretreatment, It has been found that it can be applied as a waste recycling method for substances generated as waste.

The sound insulating component of the present invention comprises 100 parts by weight of petroleum asphalt, 2 to 10 parts by weight of a thermoplastic elastomer, 100 to 400 parts by weight of mineral particles, and 100 to 800 parts of iron powder.
It is characterized in that a hot melt mixture comprising 0.1 parts by weight of a surfactant and 0.1 to 1 part by weight of a surfactant is sandwiched between sheets of felt paper or nonwoven fabric and molded into a plate shape.

Hereinafter, the present invention will be described in detail. Conventionally, plate-shaped molded articles made of asphalt mixture, which has been used as a joint plate for joints of concrete structures, mix asphalt with wood or rubber particles and fillers such as calcium carbonate and cement under heating, and Is covered with a covering material such as a sheet, formed into a plate shape, and cooled to form a product. The density of the product in this case is 1.1 to 1.2 g / cm ³
However, it is insufficient for performance as a sound insulating material.

As a result of intensive studies, the present inventors have obtained a specific improvement in sound insulation performance by the following methods. First, using petroleum-based asphalt, heat-melt it, and add a mixed material having a large mass, that is, mineral grains and metal powder grains, and mix 100 parts by weight of asphalt when mixing.
Mineral grains 100-400 parts by weight, metal powder grains 100-800
Parts by weight, and 0.1 to 1 part by weight of a surfactant is added to and mixed with the mixture, whereby a large amount of the mixed material can be mixed more, and even a relatively small amount of asphalt can be used as a binder. And can dramatically improve the strength and handling performance of the product.

Next, the mixture produced by the above method can be expected to have a product density of 2.2 to 3.2 g / cm ³ , and can be expected to have a sound insulating effect in view of the mass rule on sound insulation. Are hard at low temperatures and have insufficient resistance to bending vibration, so that a thermoplastic elastomer such as styrene-butadiene copolymer is
It has been found that by adding and modifying 10% (weight ratio), the mixture can be made to have some elasticity and to be less susceptible to bending vibration. These mixtures are mixed in a heated mixing kettle, and the mixture is sandwiched on both sides with a nonwoven fabric such as felt paper (paper impregnated with asphalt) or polyester to form a plate having a certain thickness to obtain a product. In the above, the mixed material having a mass serving as a component can be freely mixed as long as it is a powder or a granule, and does not greatly affect the quality as a product.

In the present invention, commercially available petroleum asphalt can be used as the petroleum asphalt, and particularly, bron asphalt is preferable, and commercially available petroleum asphalt can be used. As the mixed material having a large mass, heavy mineral grains and metal powder grains are used, and since the sound insulation effect depends to some extent on the mass, those having an appropriate specific gravity to obtain a predetermined product density are used. You. Examples of the heavy mineral particles include heavy fillers such as silica sand, glass powder, heavy calcium carbonate, and titanium oxide. Iron powder is mainly used as the metal powder. As the iron powder, a porous iron powder is used as necessary.

[0015] Thermoplastic elastomers are used to improve the mixing properties and to impart some elasticity and flexural vibration resistance to the product. The thermoplastic elastomer is a styrene-isoprene copolymer, styrene-butadiene copolymer or styrene- A saturated thermoplastic elastomer (SEP) having a hydrogenated phase of the isoprene phase of the isoprene copolymer is used, and these can be used alone or in combination of two or more. The surfactant is used to improve the mixing property of asphalt with other substances, and a cationic surfactant is used. Particularly, a cationic surfactant which gives an asphalt peeling preventing effect is preferable.

The sheet used for forming a mixture obtained by heating and melting the above components to form a plate-like body includes:
Plastic sheets, paper, non-woven fabrics, woven fabrics, etc. can be used as long as the sheet has appropriate strength and heat resistance and does not exude the mixture to the surface, but felt paper is used in terms of sound absorption on the surface. (Kraft paper impregnated with asphalt, etc.)
And the use of nonwoven fabrics. The sound-insulating component of the present invention is not particularly limited because it differs depending on the sound quality to be sound-insulated and the building to be constructed, but is usually formed to a thickness of about 3 to 15 mm. Similarly, the size is not particularly limited, but it is advantageous to set the size of plywood or the like usually used as a building material, or the size of a plastic style, laid carpet, or the like. When used, the sound insulating component of the present invention may be used as a stack of two or more sheets as necessary, or may be laid at appropriate intervals.

[0017]

An embodiment of the present invention will be described below. EXAMPLE 270 parts by weight of a commercially available 10/20 blown asphalt was heated and melted at 200 ° C., and 8 parts by weight of a thermoplastic elastomer (trade name: Solprene T-475, manufactured by Asahi Kasei Corporation) composed of a styrene-butadiene copolymer was melt-mixed. And knead uniformly. This asphalt is transferred to a 3 ton heating and mixing pot, and 850 parts by weight of silica sand, 820 parts by weight of iron sand, and 2 parts by weight of a cationic surfactant (asphalt peeling inhibitor) are added and kneaded to form a uniform mixture. ,
In the next step, it is formed through a large metal roll.
At the time of molding, sandwich the front and back with kraft paper impregnated with asphalt, that is, felt paper, and then cool,
A square plate-shaped sound insulating component having a thickness of 8 mm and a shape of 910 mm on a side was manufactured. The product density of this sound insulating component was 2.35 g / cm ³ , and a target value for improving sound insulating performance was obtained. Furthermore, the half compressive strength of the product is 133 kgf / cm
^{2. The} bending strength is 37.6 kgf / cm ² , and the low-temperature impact resistance at 0 ° C. has sufficient impact resistance for use. The product did not sag or soften even when left at high temperature for a long time, and had good dimensional stability.

Test Example Next, the results of testing the sound insulation performance of the sound insulation components obtained in the examples are shown. Regarding the measurement of sound insulation performance, see JIS
According to the method of measuring the floor impact sound level of A1418, and
The measurement was performed using an experimental facility provided with both a sound source reverberation room and a sound receiving reverberation room conforming to JIS A1416. As shown in FIG. 1, the test specimens for comparing the sound insulation performance were installed between a reverberation room and a ceiling-floor structure assuming a second-floor floor of a general wooden building, and a light impact sound generator, Place the heavy impact sound generator, in the reverberation room for sound reception,
The measurement was performed using a sound level meter.

In FIG. 1, 1 is a flooring material constituting the floor of the second floor, 2 is a component panel, 3 is a joist (needer) (45 × 45 mm), and 4 is a push-pull (120 × 1).
20 mm), 5 is a hanging tree (30 × 35 mm), 6 is a field margin (45 × 45 mm), 7 is a field margin (45 × 40 mm), 8 is 1
Show the ceiling panel on the floor. FIG. 2 shows an example in which the sound insulating component 9 of the present invention is applied to the ceiling to floor structure of FIG. FIG. 3 is a diagram showing an example in which the sound insulating component 9 of the present invention is applied to a concrete building such as a building, and 10 is a concrete slab provided between the first floor and the second floor.

In the tests, the floor structure of FIG. 2 in which the sound insulating component 9 of the present invention is applied to the lower surface of the flooring material 1 of the floor, the floor structure of FIG. 1 without the sound insulating component of the present invention, and the floor of FIG. In the structure, a 3-mm-thick PVC sheet was applied to the lower surface of the flooring in place of the sound-insulating component 9 of the present invention. Table 1 shows the results.

[0021]

As can be seen from the results in Table 1, the floor structure using the sound insulating component of the present invention has an improved value in light floor impact sound compared with the floor structure of FIG. 1 not using the sound insulating component of the present invention. (1
5) and an improvement value (10) in heavy floor impact sound,
It shows that the performance of light floor impact sound mitigation is high, and that the mitigation of heavy floor impact sound is extremely high. This can be easily understood from the fact that the improvement value of the heavy floor impact noise in the case of using a PVC sheet, which is one of the sound insulation components that have been frequently used, remains at (0).

The degree of freedom of the blending of the asphalt mixture forming the sound insulating component of the present invention has been greatly expanded by the present invention. In other words, by blending the thermoplastic elastomer in the asphalt, not only the area density in accordance with the mass rule required for sound insulation can be increased, but also the resistance to bending vibration of the sound insulation material can be varied, thereby improving the sound insulation performance. . Furthermore, the mixing amount of the heavy filler could be increased by incorporating the cationic surfactant into the main composition. As described above, according to the present invention, the sound insulating performance of the sound insulating material can be freely controlled to some extent by the compounding.

[0024]

As described above, the present invention provides a component capable of effectively insulating heavy floor impact noise, which has recently become a problem with floor noise, and if such a component is used, As a raw material, inexpensive asphalt, mineral grains, metal grains, and other materials can be used, and since they can be mass-produced in factories, product prices can be reduced. In addition, since it can be mixed in large quantities in a mixing pot, it can contribute to society as a method of treating and effectively recycling waste such as mineral grains and metal grains. In recent years, due to the problem of mite generation and dirt, it is preferred over glutinous carpeting, but on the other hand, it can provide an effective material for flooring floors that are troubled by floor noise problems. . In addition, conventionally, in order to effectively resolve floor noise, a more complex floor structure and a more expensive floor structure had to be necessitated.However, the components of the present invention need only be spread, and the construction is simple. It has many advantages such as economical material cost and construction cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of a floor structure of a general wooden house using no sound insulating component material of the present invention.

FIG. 2 is an exploded perspective view showing an example of a floor structure of a general wooden house using the sound insulating component of the present invention.

FIG. 3 is an exploded perspective view showing an example of a floor structure of a building or an apartment building using the sound insulating component of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flooring 2 Component panel 3 Joist 4 Push-pull 5 Hanging tree 6 Field edge receiver 7 Field edge 8 Ceiling board 9 Sound insulation constituent material of the present invention 10 Concrete slab

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04B 1/86-1/98 G10K 11/00-13/00

Claims (3)

(57) [Claims] 1. 100 parts by weight of petroleum-based asphalt, 2 to 10 parts by weight of a thermoplastic elastomer, 100 to 40 parts of mineral particles
A mixture comprising 0 parts by weight, 100 to 800 parts by weight of iron powder and 0.1 to 1 part by weight of a surfactant is sandwiched by a sheet of felt paper or a nonwoven fabric and molded into a plate shape. Sound insulation component for floor impact noise reduction. 2. A saturated thermoplastic elastomer (SEP) having a styrene-isoprene copolymer, a styrene-butadiene copolymer, and a hydrogenated phase of an isoprene phase of a styrene-isoprene copolymer. 2. The sound insulating component according to claim 1, comprising at least one member selected from the group consisting of: 3. The sound insulating component according to claim 1, wherein the surfactant is a cationic surfactant having an asphalt peeling preventing effect.