JPH05187074A - Sound absorbing material - Google Patents
Sound absorbing materialInfo
- Publication number
- JPH05187074A JPH05187074A JP4003834A JP383492A JPH05187074A JP H05187074 A JPH05187074 A JP H05187074A JP 4003834 A JP4003834 A JP 4003834A JP 383492 A JP383492 A JP 383492A JP H05187074 A JPH05187074 A JP H05187074A
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- plate
- sound
- adhesive layer
- sensitive adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、騒音を防止するための
吸音部材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing member for preventing noise.
【0002】[0002]
【従来の技術】騒音とは一般に人に不必要な音として不
快感をあたえる音の総称である。工場、機械または建設
現場の音、交通機関の音、さらに居住環境により、さま
ざまな生活の音が騒音の元となる。不必要な音が発生す
ると、エネルギーの損失であり、その設備、機械の破
壊、疲労を早め、作業時の疲労を高めて、生産効率を下
げることになる。騒音を防止するためには、騒音の発生
源に何らかの施策を加えて発生する音を減少させるこ
と、次に発生した騒音が伝搬するのを防止する対策を加
えることの、2面の対応がある。2. Description of the Related Art Noise is a general term for sounds that give uncomfortable feeling to humans as unnecessary sounds. Depending on the sound of factories, machines or construction sites, the sound of transportation, and even the living environment, the sounds of various lives are sources of noise. When unnecessary noise is generated, it is a loss of energy, which causes damage to the equipment and machinery, accelerates fatigue, increases fatigue during work, and reduces production efficiency. In order to prevent noise, there are two measures: to reduce noise generated by adding some measure to the noise source, and to add measures to prevent the next generated noise from propagating. ..
【0003】騒音対策として、空気伝搬音を減少させる
防音対策と、固体伝搬音を減少させる防振対策がある。
前者は、遮音材、吸音材を用いる。後者は防振材、制振
材を使用する。この中で吸音材は、音の反射を防ぐ働き
をし、現在は、厚みを増加させたり、異種材料の積層構
造などにより吸音特性を向上させる。As measures against noise, there are a soundproofing measure for reducing airborne sound and a vibrationproofing measure for reducing solid-borne sound.
The former uses sound insulation materials and sound absorption materials. The latter uses anti-vibration materials and damping materials. Among them, the sound absorbing material functions to prevent reflection of sound, and at present, the sound absorbing property is improved by increasing the thickness or by a laminated structure of different materials.
【0004】[0004]
【発明が解決しようとする課題】現在、各種機械、設備
は小型化されてきており、これらに取り付ける板状吸音
材も薄くする必要がある。このため、異種材料からなる
板状吸音材を積層することにより、薄くて吸音効果の高
い吸音部材を作ることが知られている。本発明の課題
は、従来の吸音部材よりも吸音効果の高い吸音部材を提
供することである。At present, various machines and equipments have been downsized, and it is necessary to thin the plate-shaped sound absorbing material attached to these machines and equipments. For this reason, it is known that a sound absorbing member that is thin and has a high sound absorbing effect is manufactured by stacking plate-shaped sound absorbing materials made of different materials. An object of the present invention is to provide a sound absorbing member having a higher sound absorbing effect than the conventional sound absorbing member.
【0005】[0005]
【課題を解決するための手段】本発明は、多孔質材料か
らなる板状吸音材が二枚以上互いにほぼ平衡に配置さ
れ、互いに隣り合った板状吸音材の相対向する面の全面
に亘ってアクリル系粘着剤層が接し、隣り合う板状吸音
材が前記アクリル系粘着剤層によって貼り合わされ、か
つこのアクリル系粘着剤層の厚さが50μm 以上、70μm
以下である吸音部材に係るものである。According to the present invention, two or more plate-shaped sound absorbing materials made of a porous material are arranged substantially in equilibrium with each other, and the plate-shaped sound absorbing materials adjacent to each other are entirely covered. The acrylic pressure-sensitive adhesive layers are in contact with each other, adjacent plate-shaped sound absorbing materials are bonded by the acrylic pressure-sensitive adhesive layer, and the thickness of the acrylic pressure-sensitive adhesive layer is 50 μm or more and 70 μm.
The present invention relates to the following sound absorbing member.
【0006】多孔質材料としては、独立気泡、連続気泡
の各種発泡体、不織布、長繊維又は短繊維をバインダー
で固めたもの、ガラス繊維、ロックウール、セラミック
繊維、石綿等がある。[0006] Examples of the porous material include various types of closed-cell and open-cell foams, non-woven fabrics, long fibers or short fibers hardened with a binder, glass fibers, rock wool, ceramic fibers, and asbestos.
【0007】[0007]
【作用】本発明者は、板状吸音材の積層方法について種
々検討する過程で、板状吸音材の全面にアクリル系粘着
剤を塗布し、板状吸音材を貼り合わせると、積層体の吸
音効果が顕著に向上することを発見した。これが他の粘
着剤、例えばゴム系粘着剤であると、吸音効果があまり
上らなかった。また、アクリル系粘着剤を、板状吸音材
の表面に、例えば線状、散点状に塗布しても、吸音効果
はほとんど向上しなかった。即ち、板状吸音材の相対向
する面の全面に亘ってアクリル系粘着剤を塗布する必要
があった。The present inventor applies the acrylic adhesive to the entire surface of the plate-shaped sound absorbing material in the course of various examinations on the method for laminating the plate-shaped sound absorbing material, and when the plate-shaped sound absorbing material is attached, the sound absorption of the laminated body is reduced. It has been found that the effect is significantly improved. If this was another pressure-sensitive adhesive, for example, a rubber-based pressure-sensitive adhesive, the sound absorbing effect was not so good. Moreover, even if the acrylic pressure-sensitive adhesive was applied to the surface of the plate-shaped sound absorbing material in, for example, a linear or scattered manner, the sound absorbing effect was hardly improved. That is, it was necessary to apply the acrylic pressure-sensitive adhesive to the entire surfaces of the plate-shaped sound absorbing material that face each other.
【0008】しかも、アクリル系粘着剤を全面に亘って
連続して塗布することだけでなく、アクリル系粘着剤層
の厚さを50μm 〜70μm の範囲内にする必要があること
を発見した。上記粘着剤層の厚さが50μm 未満である
か、70μm を越えると、吸音効果があまり顕著ではなか
った。これにより、二枚以上の板状吸音材の積層体から
なる吸音部材について、従来よりも吸音部材の厚さを小
さくしつつ、なおかつ従来と同等以上の吸音効果を得る
ことができるようになった。しかも、本発明は、同種の
多孔質材料からなる板状吸音材の積層体だけでなく、異
種材料からなる板状吸音材を積層する場合も有効である
ことが解った。従って、本発明により、事実上あらゆる
場所で、小型で効果の高い吸音部材を提供できるように
なった。これは、アクリル系粘着剤の持つ弾性が音の反
射を変化させ、実際の層厚から考えられる以上に、吸音
部材の吸音効果に影響しているためである。また、アク
リル系粘着剤層の厚さも、音の反射に影響しているもの
であろう。Moreover, it has been discovered that not only is it necessary to continuously apply the acrylic pressure-sensitive adhesive over the entire surface, but also the thickness of the acrylic pressure-sensitive adhesive layer needs to be within the range of 50 μm to 70 μm. When the thickness of the pressure-sensitive adhesive layer was less than 50 μm or more than 70 μm, the sound absorbing effect was not so remarkable. As a result, with respect to the sound absorbing member composed of a laminate of two or more plate-like sound absorbing materials, it is possible to obtain a sound absorbing effect equal to or higher than that of the conventional one while reducing the thickness of the sound absorbing member as compared with the conventional one. . Moreover, it has been found that the present invention is effective not only for a laminate of plate-shaped sound absorbing materials made of the same kind of porous material but also for stacking plate-shaped sound absorbing materials made of different materials. Therefore, according to the present invention, it is possible to provide a small and highly effective sound absorbing member virtually everywhere. This is because the elasticity of the acrylic adhesive changes the reflection of sound and affects the sound absorbing effect of the sound absorbing member more than can be considered from the actual layer thickness. The thickness of the acrylic pressure-sensitive adhesive layer may also affect the sound reflection.
【0009】[0009]
【実施例】以下、実際の実験例について述べる。下記表
1に示すように、板状吸音材の種類、粘着剤の種類、粘
着剤層の厚さ、粘着剤の塗布形状を変更し、各例の吸音
部材を製造した。表1の見方を説明する。各例の吸音部
材は、二枚の板状吸音材を積層したものである。「音源
側吸音材」の欄における丸印は、各例において音源側に
設置した板状吸音材の種類を示す。「壁側吸音材」の欄
における丸印は、壁側に設置した板状吸音材の種類を示
す。各符号は、以下の通りである。 イ:ウレタン発泡体製、厚さ9mm ロ:ポリエチレン発泡体製、厚さ2mm ハ:不織布製、厚さ 0.5mm ニ:繊維をバインダーで固結したもの、厚さ5mmEXAMPLE An actual experimental example will be described below. As shown in Table 1 below, the sound absorbing member of each example was manufactured by changing the type of plate-shaped sound absorbing material, the type of adhesive, the thickness of the adhesive layer, and the shape of the adhesive applied. How to read Table 1 will be described. The sound absorbing member of each example is a stack of two plate-shaped sound absorbing materials. The circles in the "Sound source side sound absorbing material" column indicate the types of the plate-shaped sound absorbing material installed on the sound source side in each example. A circle in the column of "wall-side sound absorbing material" indicates the type of the plate-shaped sound absorbing material installed on the wall side. Each code is as follows. B: Urethane foam, thickness 9 mm B: Polyethylene foam, thickness 2 mm C: Non-woven fabric, thickness 0.5 mm D: Fibers consolidated with binder, thickness 5 mm
【0010】「粘着剤の種類」の項目で、「アクリル」
とはアクリル系粘着剤を示し、「ゴム」はとゴム系粘着
剤を示す。「粘着剤塗布形状」の項目で、「点」とは、
板状吸音材の表面に散点状に粘着剤を塗布した場合を示
し、「くし目」とは粘着剤を直線状に細長く塗布し、か
つこの直線をほぼ平行に多数配列する場合を示す。In the "adhesive type" section, "acrylic"
Indicates an acrylic adhesive, and “rubber” indicates a rubber adhesive. In the "Adhesive application shape" item, the "dot" is
The case where the pressure-sensitive adhesive is applied to the surface of the plate-shaped sound absorbing material in a scattered manner is shown, and the "comb" means a case where the pressure-sensitive adhesive is applied linearly and long and a large number of the straight lines are arranged substantially in parallel.
【0011】[0011]
【表1】 [Table 1]
【0012】表1に示す各吸音部材について、JIS A 14
05の管内法による建築材料の垂直入射吸音率測定方法の
測定装置で測定した。測定方法としては、定在波法を用
いた。これは、主管内にできる定在波の音圧の極大値と
極小値の比を測定し、これから試料の垂直入射吸音率を
算出する方法である。125 〜1600Hzの周波数範囲では直
径99mmφの管を用い、800 〜4000Hzの周波数範囲では直
径29mmφの管を用いた。この試料を装着した試料支持部
を主管に接続した。音源を動かし、発振器の周波数を測
定周波数にし、主管内に定在波をつくった。測定器の探
音管を主管軸に平行移動し、主管内の定在波比を測定し
た。このとき定在波比は、抵抗減衰器で置換して求める
のが望ましい。管壁での損失を補正するために、試料端
から少なくとも二つ以上の音圧極小値に対する定在波比
を測定し、これを試料面に外挿して定在波比を求めた。For each sound absorbing member shown in Table 1, JIS A 14
It was measured with the measuring device of the vertical incidence sound absorption coefficient measuring method of the building material by the in-pipe method of 05. The standing wave method was used as the measuring method. This is a method of measuring the ratio of the maximum value and the minimum value of the sound pressure of the standing wave formed in the main pipe, and calculating the normal incidence sound absorption coefficient of the sample from this. A tube with a diameter of 99 mmφ was used in the frequency range of 125 to 1600 Hz, and a tube with a diameter of 29 mmφ was used in the frequency range of 800 to 4000 Hz. The sample support part on which this sample was mounted was connected to the main pipe. The sound source was moved, the frequency of the oscillator was set to the measurement frequency, and a standing wave was created in the main pipe. The sound tube of the measuring instrument was moved in parallel with the main pipe axis, and the standing wave ratio in the main pipe was measured. At this time, the standing wave ratio is preferably obtained by replacing with a resistance attenuator. In order to correct the loss at the tube wall, the standing wave ratio for at least two minimum values of sound pressure was measured from the sample end, and this was extrapolated to the sample surface to obtain the standing wave ratio.
【0013】垂直入射吸音率aO は、定在波比nから、
下式に従って算出した。The normal incident sound absorption coefficient a O is calculated from the standing wave ratio n by
It was calculated according to the following formula.
【数1】aO =4/(n+ 1/n+2) 定在波比nを抵抗減衰器で置換して測定したときは、そ
のレベル差L(dB)から、下式に従って定在波比nを求め
た。[Formula 1] a O = 4 / (n + 1 / n + 2) When the standing wave ratio n is measured by replacing it with a resistance attenuator, the standing wave ratio n is calculated from the level difference L (dB) according to the following formula. I asked.
【数2】n=log10(L/20) 各試験用吸音部材について、中心周波数と垂直入射吸音
率との関係を測定し、図1〜図6にグラフとして示し
た。各グラフ(曲線)の符号は表1に示す。250 〜2000
Hz程度の範囲が、騒音として重要である。図1には、グ
ラフA,B,E,Hを示した。この結果からみると、ア
クリル系粘着剤層の厚さが50〜70μm の場合に特性がよ
い (実施例1,2)。アクリル系粘着剤層の厚さが30μ
m であるか、又は粘着剤を用いない場合は、実施例1,
2の場合よりもかなり吸音特性が劣る。For Equation 2] n = log 10 (L / 20 ) each test sound absorbing member, measurement of the relationship between the center frequency and normal incidence sound absorption coefficient, shown graphically in Figures 1-6. The symbols of each graph (curve) are shown in Table 1. 250-2000
The range of Hz is important as noise. Graphs A, B, E and H are shown in FIG. From these results, the characteristics are good when the thickness of the acrylic pressure-sensitive adhesive layer is 50 to 70 μm (Examples 1 and 2). The thickness of the acrylic adhesive layer is 30μ
m or no adhesive is used, Example 1,
The sound absorption characteristics are considerably inferior to the case of 2.
【0014】図2には、グラフA,B,F,Gを示す。
この結果からみて、アクリル系粘着剤層の厚さが90μm
、130 μm の場合には、やはり吸音特性が実施例1,
2にくらべて落ちる。図3にはグラフA,I,Jを示
す。この結果からみて、アクリル系粘着剤層で板状吸音
材を貼り合わせ、かつその層厚を50μm にしても、アク
リル系粘着剤を散点状、くし目状に塗布した場合は、吸
音特性が上がらない。図4にはグラフC,Kを示す。こ
の結果からみて、互いに異なる材質からなる板状吸音材
を貼り合わせた場合にも、本発明は有効である。図5に
はグラフO,Lを示す。この結果からみても、互いに異
なる材質からなる板状吸音材を貼り合わせた場合にも、
本発明は有効である。FIG. 2 shows graphs A, B, F and G.
From this result, the thickness of the acrylic adhesive layer is 90 μm.
, 130 μm, the sound absorption characteristics of Example 1,
It falls compared to 2. Graphs A, I, and J are shown in FIG. From this result, it can be seen that even if the plate-shaped sound absorbing material is pasted with the acrylic pressure-sensitive adhesive layer and the layer thickness is 50 μm, if the acrylic pressure-sensitive adhesive is applied in a dotted pattern or a comb pattern, I can't go up. Graphs C and K are shown in FIG. From this result, the present invention is effective even when the plate-shaped sound absorbing materials made of different materials are bonded together. Graphs O and L are shown in FIG. From this result, even when the plate-shaped sound absorbing materials made of different materials are stuck together,
The present invention is effective.
【0015】図6にはグラフA,B,M,Nを示す。ゴ
ム系粘着剤を用いて、かつその厚さを50μm とした場合
に限り( グラフM)、吸音特性がかなり向上することが
解った。しかし、それでも、本発明の吸音部材にはかな
り及ばない。FIG. 6 shows graphs A, B, M and N. It was found that the sound absorbing property was significantly improved only when the rubber adhesive was used and the thickness thereof was set to 50 μm (graph M). However, it is still far below the sound absorbing member of the present invention.
【0016】[0016]
【発明の効果】以上述べたように、本発明によれば、二
枚以上の板状吸音材の積層体からなる吸音部材につい
て、従来よりも吸音効果を大きく向上させることができ
る。この結果、従来よりも大きく各種機械、設備の騒音
を低減させることができる。また、従来よりも吸音部材
を薄くしても、従来と同等以上の騒音防止効果を得るこ
とができる。As described above, according to the present invention, it is possible to greatly improve the sound absorbing effect of the sound absorbing member composed of the laminated body of two or more plate-like sound absorbing materials as compared with the conventional case. As a result, the noise of various machines and equipment can be reduced more than ever before. Even if the sound absorbing member is made thinner than the conventional one, it is possible to obtain a noise prevention effect equal to or more than the conventional one.
【図1】各実験試料の垂直入射吸音率と中心周波数との
関係を示すグラフである。FIG. 1 is a graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of each experimental sample.
【図2】各実験試料の垂直入射吸音率と中心周波数との
関係を示すグラフである。FIG. 2 is a graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of each experimental sample.
【図3】各実験試料の垂直入射吸音率と中心周波数との
関係を示すグラフである。FIG. 3 is a graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of each experimental sample.
【図4】各実験試料の垂直入射吸音率と中心周波数との
関係を示すグラフである。FIG. 4 is a graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of each experimental sample.
【図5】各実験試料の垂直入射吸音率と中心周波数との
関係を示すグラフである。FIG. 5 is a graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of each experimental sample.
【図6】各実験試料の垂直入射吸音率と中心周波数との
関係を示すグラフである。FIG. 6 is a graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of each experimental sample.
A,B,C,D 本発明例の実験試料について、垂直入
射吸音率と中心周波数との関係を示すグラフ E,F,G,H,I,J,K,L,M,N 対照例の実
験試料について、垂直入射吸音率と中心周波数との関係
を示すグラフA, B, C, D Graphs showing the relationship between the normal incidence sound absorption coefficient and the center frequency of the experimental samples of the present invention. E, F, G, H, I, J, K, L, M, N Graph showing the relationship between the normal incidence sound absorption coefficient and the center frequency of the experimental sample
Claims (1)
上互いにほぼ平行に配置され、互いに隣り合った板状吸
音材の相対向する面の全面に亘ってアクリル系粘着剤層
が接し、隣り合う板状吸音材が前記アクリル系粘着剤層
によって貼り合わされ、かつこのアクリル系粘着剤層の
厚さが50μm 以上、70μm 以下である吸音部材。1. Two or more plate-shaped sound absorbing materials made of a porous material are arranged substantially parallel to each other, and an acrylic pressure-sensitive adhesive layer is in contact over the entire surfaces of the plate-shaped sound absorbing materials adjacent to each other facing each other. A sound absorbing member in which adjacent plate-shaped sound absorbing materials are bonded together by the acrylic pressure-sensitive adhesive layer, and the thickness of the acrylic pressure-sensitive adhesive layer is 50 μm or more and 70 μm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4003834A JP2963264B2 (en) | 1992-01-13 | 1992-01-13 | Sound absorbing member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4003834A JP2963264B2 (en) | 1992-01-13 | 1992-01-13 | Sound absorbing member |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05187074A true JPH05187074A (en) | 1993-07-27 |
JP2963264B2 JP2963264B2 (en) | 1999-10-18 |
Family
ID=11568222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4003834A Expired - Fee Related JP2963264B2 (en) | 1992-01-13 | 1992-01-13 | Sound absorbing member |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2963264B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012137353A1 (en) * | 2011-04-08 | 2012-10-11 | 株式会社ハウス119 | Laminate structure of sound-absorbing material |
-
1992
- 1992-01-13 JP JP4003834A patent/JP2963264B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012137353A1 (en) * | 2011-04-08 | 2012-10-11 | 株式会社ハウス119 | Laminate structure of sound-absorbing material |
CN103597539A (en) * | 2011-04-08 | 2014-02-19 | 株式会社房屋119 | Laminate structure of sound-absorbing material |
US9027705B2 (en) | 2011-04-08 | 2015-05-12 | Aural Sonic Inc. | Sound-absorbing member lamination structure |
JP5932774B2 (en) * | 2011-04-08 | 2016-06-08 | Aural Sonic株式会社 | Sound absorbing material laminated structure |
Also Published As
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