JP3383468B2 - Porous sound absorbing plate - Google Patents
Porous sound absorbing plateInfo
- Publication number
- JP3383468B2 JP3383468B2 JP11880595A JP11880595A JP3383468B2 JP 3383468 B2 JP3383468 B2 JP 3383468B2 JP 11880595 A JP11880595 A JP 11880595A JP 11880595 A JP11880595 A JP 11880595A JP 3383468 B2 JP3383468 B2 JP 3383468B2
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- porous
- metal
- absorbing plate
- present
- 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.)
- Expired - Fee Related
Links
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Building Environments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、道路用防音壁、鉄道用
防音壁、橋梁、高架道路橋等の高架構造物の下部、或い
は堀割や半地下道路の側面、高速道路、又は一般ビルの
壁面や地下道の天井面等に、主として防音、吸音用とし
て取付けられる多孔質吸音板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall for roads, a soundproof wall for railways, a lower part of an elevated structure such as a bridge, an elevated road bridge, a side surface of a trench or a semi-underground road, an expressway, or a general building. The present invention relates to a porous sound absorbing plate that is attached to a wall surface or a ceiling surface of an underpass mainly for soundproofing and sound absorption.
【０００２】[0002]
【従来の技術】従来の多孔質吸音板としては、グラスウ
ール、ロックウール、金属焼結材、金属発泡材等が一般
的であり、また金属繊維による吸音材においては金属繊
維をエキスパンドメタル等の表面材でサンドイッチ状に
挟んで圧着成形したものが一般的であり、例えば特開昭
６３−１０３２９９号公報、特開昭６３−１７４０９８
号公報、特開平３−１３７２５６号公報等にはアルミニ
ウム等の金属繊維の積重体に金網やエキスパンドメタル
等の表面材を積層したものが記載されている。2. Description of the Related Art As conventional porous sound-absorbing plates, glass wool, rock wool, metal sintered materials, metal foam materials, etc. are generally used. In sound-absorbing materials made of metal fibers, metal fibers are used as a surface of expanded metal or the like. The material is generally sandwiched between materials and press-molded. For example, JP-A-63-103299 and JP-A-63-174098.
Japanese Patent Application Laid-Open No. 3-137256 and the like disclose a stack of metal fibers such as aluminum and a surface material such as a wire mesh or expanded metal.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記の如
きグラスウール、ロックウール、金属繊維、金属焼結
材、金属発泡材等の吸音材は、それぞれ固有の吸音特性
を有しているため、設置される場所に応じて吸音特性を
変更させようとすれば、吸音特性に影響を及ぼす表面材
や背後空気層、吸音材自体の厚さやかさ比重等を変化さ
せて対応せざるを得なかった。しかし必要な吸音特性に
対応していちいち表面材を変えて積層するのは面倒であ
り、またコストアップにもつながり、さらに背後空気層
を変化させるにも限界があり、さらにまた吸音材自体の
厚さやかさ比重等を変化させるには、作製段階からその
規格で個別に対応する必要があり、いずれにしても吸音
特性を変更させるには大変面倒であった。However, the above-described sound absorbing materials such as glass wool, rock wool, metal fiber, metal sintered material, and metal foam material have their own sound absorbing characteristics, and are therefore installed. In order to change the sound absorption characteristics depending on the location, the surface material, the back air layer, the thickness and bulk specific gravity of the sound absorption material itself, which affect the sound absorption characteristics, have to be changed. However, it is troublesome to change the surface material and stack the layers in response to the required sound absorption characteristics, which also leads to cost increase, and there is a limit to changing the back air layer. In order to change the specific gravity of the sheath or the like, it is necessary to individually deal with the standard from the manufacturing stage, and in any case, it was very troublesome to change the sound absorption characteristics.
【０００４】また上記の如き吸音材において、グラスウ
ールやロックウールは軟質であり、また水分を吸収して
吸音特性が低下するため、強度や耐久性に乏しく、また
金属焼結材や金属発泡材等は加工性に劣り、さらにアル
ミニウム等の金属繊維の積重体に金網やエキスパンドメ
タル等の表面材を積層したものは、強度的に優れるもの
の製作が面倒であり、また耐蝕性を考慮した材質の金属
繊維を用いても、その金属繊維が表面材を透過して直接
空気に触れているため、長期的には耐蝕性の問題が生じ
ていた。In the sound absorbing material as described above, glass wool and rock wool are soft, and since sound absorbing properties are deteriorated by absorbing water, strength and durability are poor, and metal sintered material, metal foam material, etc. Is inferior in workability, and in addition, a stack of metal fibers such as aluminum and a surface material such as wire mesh or expanded metal is difficult to manufacture even though it has excellent strength, and it is a metal of a material considering corrosion resistance. Even if fibers are used, the metal fibers penetrate the surface material and come into direct contact with the air, so that the problem of corrosion resistance has occurred in the long term.
【０００５】そこで本発明は上記の如き問題を解決し、
耐久性に優れ、製作が容易であり、また容易に吸音特性
を変更させることのできる多孔質吸音板を提供せんとす
るものである。Therefore, the present invention solves the above problems,
An object of the present invention is to provide a porous sound absorbing plate that has excellent durability, is easy to manufacture, and can easily change the sound absorbing characteristics.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明者は鋭意研究した結果、有機樹脂バインダー
および／または無機バインダーを混入させて金属繊維を
加圧成形して多孔質な板状にした吸音板にすることによ
り、製作が容易になると共に保形性に優れ、また金属繊
維は有機樹脂バインダーや無機バインダーに覆われて耐
蝕性が向上し、またこの多孔質な板状体は再加圧が可能
であり、しかも再加圧して板厚やかさ比重を変えること
により、容易に吸音特性を変更することができる、こと
等を知得し、本発明を完成するに至った。In order to achieve the above object, the inventors of the present invention have earnestly studied and, as a result, have mixed an organic resin binder and / or an inorganic binder and press-molded a metal fiber to form a porous plate. By making the sound absorbing plate into a shape, it is easy to manufacture and is excellent in shape retention, and the metal fiber is covered with the organic resin binder or the inorganic binder to improve the corrosion resistance. The present invention has been completed based on the knowledge that the sound absorption characteristics can be easily changed by repressurizing and changing the plate thickness and the bulk specific gravity by repressurizing.
【０００７】すなわち本発明に係る多孔質吸音板は、有
機樹脂バインダーおよび／または無機バインダーが混入
された金属繊維からなる集積体を、多孔質な板状に加圧
成形してなり、再加圧により吸音特性が変更されること
を特徴とするものである。That is, the porous sound-absorbing plate according to the present invention is formed by press-molding an aggregate consisting of metal fibers mixed with an organic resin binder and / or an inorganic binder into a porous plate shape, and re-pressing. The sound absorption characteristic is changed by the above.
【０００８】本発明に用いられる前記有機樹脂バインダ
ーや無機バインダーの種類は、特に限定されるものでは
ないが、一般には有機樹脂バインダーとしてはエポキシ
樹脂、ＰＭＭＡ、アクリル樹脂、ウレタン樹脂、ポリエ
ステル樹脂、シリコーン樹脂等が用いられ、無機バイン
ダーとしてはアルカリシリケート、アルキルシリケート
等が用いられる。またこれら有機樹脂バインダーや無機
バインダーは１種類のみ用いられていてもよいし、２種
以上が混合されて用いられてもよい。The kinds of the organic resin binder and the inorganic binder used in the present invention are not particularly limited, but generally, the organic resin binder is epoxy resin, PMMA, acrylic resin, urethane resin, polyester resin, silicone. Resin or the like is used, and as the inorganic binder, alkali silicate, alkyl silicate, or the like is used. Further, these organic resin binders and inorganic binders may be used alone or in combination of two or more.
【０００９】次に前記金属繊維も特に限定されるもので
はないが、一般には耐蝕性に優れたニッケル繊維、アル
ミニウム繊維、ステンレス繊維等が用いられる。また金
属繊維の寸法は、より安定した保形性を具備させるため
に、その繊維径を３０〜１００μｍとし、繊維長さを１
０ｍｍ以上とするのが好ましい。Next, the metal fiber is not particularly limited, but generally, nickel fiber, aluminum fiber, stainless fiber or the like having excellent corrosion resistance is used. Further, the size of the metal fiber is set to have a fiber diameter of 30 to 100 μm and a fiber length of 1 in order to provide more stable shape retention.
It is preferably 0 mm or more.
【００１０】本発明の作製方法は、一般には、予め金属
繊維を積層して集積体を形成し、該集積体に有機樹脂バ
インダーおよび／または無機バインダーを浸透混入さ
せ、多孔質な板状に加圧成形することにより得られる
が、予め金属繊維に有機樹脂バインダーおよび／または
無機バインダーを混合付着させ、しかる後にこの金属繊
維を積層して集積体を形成し、該集積体を板状に加圧成
形してもよく、また他の方法であってもよく、特にその
作製方法は限定されるものではない。かようにして得ら
れる本発明について、設置される場所に応じて吸音特性
を変更させるには、本発明多孔質吸音板を適宜再加圧し
て板厚やかさ比重を変化させれば、その変化に応じた吸
音特性が得られる。なお本発明多孔質吸音板の面密度
は、吸音特性を考慮し、また再加圧による吸音特性の変
更を考慮すると一般には１５００〜５０００ｇ／ｍ2 程
度になされ、また板厚は施工性と吸音特性を考慮すると
一般には１〜３ｍｍ程度となされる。In the production method of the present invention, generally, metal fibers are laminated in advance to form an aggregate, and an organic resin binder and / or an inorganic binder is permeated and mixed into the aggregate to form a porous plate. It can be obtained by pressure molding. An organic resin binder and / or an inorganic binder is mixed and attached to metal fibers in advance, and then the metal fibers are laminated to form an aggregate, and the aggregate is pressed into a plate shape. It may be molded or may be another method, and its manufacturing method is not particularly limited. For the present invention thus obtained, in order to change the sound absorption characteristics depending on the place of installation, the thickness of the porous sound absorbing plate of the present invention is appropriately re-pressed to change the plate thickness or bulk specific gravity. The appropriate sound absorption characteristics can be obtained. The surface density of the porous sound absorbing plate of the present invention is generally set to about 1500 to 5000 g / m 2 in consideration of the sound absorbing characteristics and the change of the sound absorbing characteristics due to re-pressurization. Considering the characteristics, it is generally about 1 to 3 mm.
【００１１】[0011]
【作用】この発明による多孔質吸音板によれば、有機樹
脂バインダーおよび／または無機バインダーが混入され
た金属繊維からなる集積体が、多孔質な板状に加圧成形
されてなるため、表面材が不要であり、従って製作が容
易であると共に保形性に優れ、また金属繊維は有機樹脂
バインダーや無機バインダーに覆われて耐蝕性が向上
し、さらに再加圧された場合にも有機樹脂バインダーや
無機バインダーを介しているためその保形性に優れ、従
って再加圧して板厚やかさ比重を変えることにより、容
易に吸音特性を変更することができる。According to the porous sound absorbing plate of the present invention, since the aggregate made of metal fibers mixed with the organic resin binder and / or the inorganic binder is pressure-molded into a porous plate shape, Therefore, it is easy to manufacture and has excellent shape retention. The metal fiber is covered with an organic resin binder or an inorganic binder to improve the corrosion resistance. Since it has an inorganic binder and an inorganic binder, the shape retention property is excellent. Therefore, the sound absorption characteristics can be easily changed by re-pressing to change the plate thickness and the bulk specific gravity.
【００１２】[0012]
【実施例】次に、本発明の実施例について具体的に説明
する。EXAMPLES Next, examples of the present invention will be specifically described.
【００１３】まず繊維径３０〜１００μｍのアルミニウ
ム繊維からなる金属繊維１を面密度２０００〜２３００
ｇ／ｍ2 となるように積層して集積体を形成し、これに
有機樹脂バインダーを浸透混入させ、さらに板状に加圧
成形することにより板厚が２ｍｍ、かさ比重が１．００
〜１．１５である図１の如き断面模式図に示される実施
例１の本発明多孔質吸音板Ｐを作製した。First, a metal fiber 1 made of aluminum fiber having a fiber diameter of 30 to 100 μm is applied to an areal density of 2000 to 2300.
A stack is formed to have a thickness of g / m 2 , an organic resin binder is permeated and mixed into the stack, and pressure-molded into a plate shape to have a plate thickness of 2 mm and a bulk specific gravity of 1.00.
The porous sound-absorbing plate P of the present invention of Example 1 shown in the schematic sectional view of FIG.
【００１４】次に前記実施例１の多孔質吸音板を再加圧
して、板厚が１．７ｍｍ、かさ比重が１．２０〜１．４
０とした実施例２、板厚が１．４ｍｍ、かさ比重が１．
４５〜１．６５とした実施例３、板厚が１．２ｍｍ、か
さ比重が１．７０〜１．８５とした実施例４、板厚が
１．１ｍｍ、かさ比重が１．９０〜２．０５とした実施
例５のそれぞれ本発明からなる多孔質吸音板を作製し
た。なお前記実施例１〜５の背後空気層は全て７５ｍｍ
に統一した。Next, the porous sound absorbing plate of Example 1 was repressurized to have a plate thickness of 1.7 mm and a bulk specific gravity of 1.20 to 1.4.
Example 2 in which the thickness was 1.4, the plate thickness was 1.4 mm, and the bulk specific gravity was 1.
45 to 1.65, Example 3, plate thickness 1.2 mm, bulk specific gravity 1.70 to 1.85 Example 4, plate thickness 1.1 mm, bulk specific gravity 1.90 to 2.85. In Example 5, the porous sound absorbing plate of the present invention was manufactured. The back air layers of Examples 1 to 5 were all 75 mm.
Unified.
【００１５】以上実施例１〜５についてそれぞれ、ＪＩ
Ｓ−Ａ−１４０５により垂直入射の音に対する吸音特性
を測定し、その値を図２に示した。図２から明らかなよ
うに、各実施例１〜５を比較すると、吸音率のピークを
示す周波数域がそれぞれ異なり、またそのピークでの吸
音率も実施例１及び実施例４と、実施例２〜４とでは異
なっており、再加圧して板厚、かさ比重を変えることに
より、吸音特性が変化していることが判る。すなわち実
施例２では１０００Ｈｚ付近にピークがあり、１０００
Ｈｚ以上の周波数域で有効であり、また実施例３は８０
０Ｈｚ付近にピークがあり、６３０〜１０００Ｈｚの間
で有効であり、広い周波数域で高い吸音特性を有し、最
もバランスの良い吸音特性を示している。また実施例４
は５００Ｈｚ付近にピークがあり、６３０Ｈｚ以下で有
効である。Regarding the first to fifth embodiments, JI
S-A-1405 was used to measure the sound absorption characteristics for vertically incident sound, and the values are shown in FIG. As is clear from FIG. 2, when Examples 1 to 5 are compared with each other, the frequency ranges showing the peaks of the sound absorption coefficient are different from each other, and the sound absorption coefficients at the peaks are also the first and fourth embodiments and the second embodiment. It is understood that the sound absorption characteristics are changed by re-pressing and changing the plate thickness and the bulk specific gravity. That is, in Example 2, there was a peak near 1000 Hz, and
It is effective in the frequency range of Hz or higher, and is 80 in the third embodiment.
It has a peak near 0 Hz, is effective between 630 and 1000 Hz, has a high sound absorption characteristic in a wide frequency range, and exhibits the most well-balanced sound absorption characteristic. Example 4
Has a peak near 500 Hz and is effective at 630 Hz or less.
【００１６】かようにして本発明多孔質吸音板に具備さ
せる吸音特性は、適宜再加圧することにより、設置され
る場所の騒音の大きさ、周波数域に応じて、適宜所望の
吸音特性に変更することができるが、予め設置場所に要
求される吸音特性が判明している場合等は、製作時の加
圧成形段階における加圧力を適宜加減することにより、
その吸音特性を始めから具備させた本発明多孔質吸音板
を作製してもよい。In this way, the sound absorbing characteristic provided in the porous sound absorbing plate of the present invention is appropriately re-pressurized to be changed to a desired sound absorbing characteristic in accordance with the noise level and the frequency range of the place where it is installed. However, if the sound absorption characteristics required for the installation location are known in advance, by appropriately adjusting the pressure applied during the pressure molding stage during production,
The porous sound absorbing plate of the present invention having the sound absorbing property from the beginning may be manufactured.
【００１７】次に本発明多孔質吸音板の耐蝕性を確認す
るために、上記実施例１〜５と、比較例としてアルミニ
ウム繊維にアルミエキスパンドメタルからなる表面材を
積層した従来の多孔質吸音板とについて、それぞれＪＩ
Ｓ−Ｋ−５４００による塩水噴霧試験を行い、塩水噴霧
９６時間後の外観を比較観察したところ、比較例は褐色
に変色していたのに対して、上記実施例はいずれも変化
が見られず、耐蝕性に優れていることが確認された。Next, in order to confirm the corrosion resistance of the porous sound absorbing plate of the present invention, a conventional porous sound absorbing plate in which the surface material made of aluminum expanded metal is laminated on aluminum fiber as a comparative example is used. About and JI
When a salt spray test with SK-5400 was performed and the appearance of the salt spray after 96 hours was compared and observed, the comparative example was discolored to brown, whereas no change was observed in any of the above examples. It was confirmed that the corrosion resistance was excellent.
【００１８】[0018]
【発明の効果】この発明による多孔質吸音板によれば、
有機樹脂バインダーおよび／または無機バインダーが混
入された金属繊維からなる集積体が、多孔質な板状に加
圧成形されてなるため、表面材を使用せずとも保形で
き、従って製作が容易であると共に保形性に優れ、また
金属繊維は有機樹脂バインダーや無機バインダーに覆わ
れて耐蝕性や耐久性が向上し、さらに再加圧して板厚や
かさ比重を変えることにより、容易に吸音特性を変更す
ることができる。According to the porous sound absorbing plate of the present invention,
Since an aggregate consisting of metal fibers mixed with an organic resin binder and / or an inorganic binder is pressure-molded into a porous plate shape, it is possible to maintain the shape without using a surface material, and therefore easy to manufacture. In addition to being excellent in shape retention, the metal fiber is covered with an organic resin binder or an inorganic binder to improve corrosion resistance and durability, and by repressurizing to change the plate thickness and bulk specific gravity, it is possible to easily obtain sound absorption characteristics. Can be changed.
【００１９】またグラスウールやロックウール等を使用
せず、金属繊維を使用しているため、加工性がよく、ま
た有機樹脂バインダーや無機バインダーに覆われている
ことも相まって飛散等の問題もなく、従って屋外、屋内
を問わず、あらゆる場所に使用することができる。Further, since glass fibers, rock wool, etc. are not used and metal fibers are used, the processability is good and there is no problem of scattering due to the fact that they are covered with an organic resin binder or an inorganic binder. Therefore, it can be used everywhere, both outdoors and indoors.
【図１】本発明多孔質吸音板の一実施例を示す断面模式
図である。FIG. 1 is a schematic sectional view showing an embodiment of a porous sound absorbing plate of the present invention.
【図２】本発明多孔質吸音板の実施例における垂直入射
の音に対する吸音特性の測定結果を示すグラフである。FIG. 2 is a graph showing measurement results of sound absorption characteristics with respect to vertically incident sound in an example of the porous sound absorbing plate of the present invention.
Ｐ 本発明多孔質吸音板 １ 金属繊維 P The present invention porous sound absorbing plate 1 metal fiber
Claims (2)
バインダーが混入された金属繊維からなる集積体を、多
孔質な板状に加圧成形してなり、再加圧により吸音特性
が変更される多孔質吸音板。1. A porous body obtained by press-molding an aggregate made of metal fibers mixed with an organic resin binder and / or an inorganic binder into a porous plate shape, and the sound absorbing property of which is changed by re-pressurization. Sound absorbing board.
μｍであり、繊維長が１０ｍｍ以上である請求項１又は
２記載の多孔質吸音板。2. The metal fiber has a fiber diameter of 30 to 100.
The porous sound absorbing plate according to claim 1 or 2, which has a fiber length of 10 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11880595A JP3383468B2 (en) | 1995-05-17 | 1995-05-17 | Porous sound absorbing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11880595A JP3383468B2 (en) | 1995-05-17 | 1995-05-17 | Porous sound absorbing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08311823A JPH08311823A (en) | 1996-11-26 |
| JP3383468B2 true JP3383468B2 (en) | 2003-03-04 |
Family
ID=14745565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11880595A Expired - Fee Related JP3383468B2 (en) | 1995-05-17 | 1995-05-17 | Porous sound absorbing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3383468B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040021360A (en) * | 2002-09-04 | 2004-03-10 | 주식회사 폼텍 | Sound-absorbing wall made of a foamed-alumium |
| CN102510912A (en) * | 2009-11-10 | 2012-06-20 | 罗成民 | Flame retardant mat plate material for construction, and preparation method thereof |
| KR101225930B1 (en) * | 2010-11-01 | 2013-01-25 | 지앤지 주식회사 | A board had metal wire brush manufacturing method |
| CN103806552B (en) * | 2013-12-31 | 2016-01-13 | 李�杰 | A kind of production method of sound-absorbing sheet material |
-
1995
- 1995-05-17 JP JP11880595A patent/JP3383468B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08311823A (en) | 1996-11-26 |
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