JP2002023764A - Acoustic material - Google Patents
Acoustic materialInfo
- Publication number
- JP2002023764A JP2002023764A JP2000203593A JP2000203593A JP2002023764A JP 2002023764 A JP2002023764 A JP 2002023764A JP 2000203593 A JP2000203593 A JP 2000203593A JP 2000203593 A JP2000203593 A JP 2000203593A JP 2002023764 A JP2002023764 A JP 2002023764A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- sound
- absorbing material
- sound absorbing
- fibers
- 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.)
- Pending
Links
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Building Environments (AREA)
- Nonwoven Fabrics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、道路、鉄道、建築
などで使用される吸音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 material used on roads, railways, buildings, and the like.
【０００２】[0002]
【従来の技術】従来の吸音材は、ガラス繊維集合体が主
に使われている。かかる吸音材は、ガラス繊維の伸度が
極端に低いという致命的欠陥から、吸音材の生産、運
搬、施工、設置後においても、破損しやすいとか形態崩
れが起こりやすいという欠点を有しており、また、ガラ
ス繊維片の施工時の破損、飛散などの欠点が懸念される
ものであった。さらに吸音材そのものの敷設構造の関係
で吸音材の厚みが必要吸音特性以上に厚く、嵩を出す必
要がある場合、しかも厚み・嵩を出しながらより軽量化
・形状安定化が望まれる場合、従来多量に使用されてい
るガラス繊維では対応し難いという問題がある。また、
その欠点を補うために、合成樹脂フィルムやガラス繊維
製織物などでガラス繊維集合体を包んだものが開発され
ているが、未だ不十分である。2. Description of the Related Art As a conventional sound absorbing material, a glass fiber aggregate is mainly used. Such a sound-absorbing material has a drawback that, due to the fatal defect that the elongation of the glass fiber is extremely low, the sound-absorbing material is easily damaged or loses its shape even after production, transportation, construction and installation. In addition, there were concerns about defects such as breakage and scattering at the time of construction of glass fiber pieces. Furthermore, if the thickness of the sound-absorbing material is thicker than the required sound-absorbing characteristics due to the laying structure of the sound-absorbing material itself and it is necessary to increase the bulk, and if it is desired to reduce the weight and shape stability while increasing the thickness and bulk, There is a problem that it is difficult to cope with glass fibers used in large amounts. Also,
In order to compensate for the drawback, a glass fiber aggregate wrapped with a synthetic resin film or glass fiber fabric has been developed, but it is still insufficient.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、かか
る従来技術の背景に鑑み、良好なる吸音性、耐候性、形
態安定性、強力、加工性、装着作業性、燃焼性などを満
足し、充分な厚み・嵩を設計でき、軽量で優れた吸音材
を提供するとともに、効率よく生産することが可能な吸
音材技術を提供せんとするものである。SUMMARY OF THE INVENTION In view of the background of the prior art, it is an object of the present invention to satisfy satisfactory sound absorption, weather resistance, form stability, strength, workability, mounting workability, flammability, and the like. It is intended to provide a lightweight and excellent sound absorbing material that can be designed to have a sufficient thickness and bulk, and to provide a sound absorbing material technology that can be efficiently produced.
【０００４】[0004]
【課題を解決するための手段】本発明は、かかる課題を
解決するために、次のような手段を採用するものであ
る。すなわち、 （１）合成繊維からなる、繊維相互が部分的に接着され
た密度が０．０２ｇ／cc以上である繊維集合体から構成
され、かつ、該繊維集合体表面に凸部が少なくとも１個
以上設けられていることを特徴とする吸音材。The present invention employs the following means in order to solve the above-mentioned problems. That is, (1) a fiber aggregate composed of synthetic fibers and having a density of 0.02 g / cc or more in which fibers are partially bonded to each other, and at least one convex portion on the surface of the fiber aggregate. A sound absorbing material provided as described above.
【０００５】（２）前記繊維集合体を構成する単繊維軸
がほぼ音源方向に配列しているかまたはランダムに配列
しており、前記繊維集合体表面の凸部を有する面が音源
とは反対方向に配設されていることを特徴とする前記
（１）に記載の吸音材。(2) The single fiber axes constituting the fiber assembly are arranged substantially in the direction of the sound source or randomly arranged, and the surface of the fiber assembly having a convex portion has a direction opposite to the sound source. The sound-absorbing material according to (1), wherein
【０００６】[0006]
【発明の実施の形態】本発明は、前記課題、つまり良好
なる吸音性、耐候性、形態安定性、強力、加工性、装着
作業性、燃焼性などを満足し、軽量で優れた吸音材を効
率よく生産する技術について、鋭意検討し、繊維集合体
表面に凹凸加工を施すことで、かかる課題の解決に至っ
たものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a lightweight and excellent sound absorbing material which satisfies the above-mentioned problems, that is, good sound absorbing properties, weather resistance, form stability, strongness, workability, mounting workability, combustibility and the like. The inventors of the present invention have studied the technology for efficient production and have performed a roughening process on the surface of the fiber assembly to solve such a problem.
【０００７】本発明において、吸音材を構成する繊維
は、耐候性の点から合成繊維を主体として用いることが
好ましい。かかる合成繊維素材としては、ポリエステ
ル、ポリアミド、アクリル、ポリプロピレンおよびポリ
エチレンから選ばれた少なくとも１種の合成繊維を使用
かすることができるが、これらの中でも、耐候性、難燃
性、リサイクル性の点から、ポリエステル繊維を使うの
が好ましい。In the present invention, the fibers constituting the sound absorbing material are preferably composed mainly of synthetic fibers from the viewpoint of weather resistance. As such a synthetic fiber material, at least one kind of synthetic fiber selected from polyester, polyamide, acrylic, polypropylene and polyethylene can be used. Among them, in view of weather resistance, flame retardancy and recyclability. Therefore, it is preferable to use polyester fibers.
【０００８】かかる合成繊維の太さは、１．１〜１１０
テックスのものを好ましく使用することができる。加工
性、扱い性の点からは太い方がよいが、特に開繊機で生
産性を向上させることを考慮すると、３．３〜１６．５
テックスのものがより好ましく用いられる。なお、吸音
性からの面からは、合成繊維の太さは細い方がよく、特
に低音域である２００〜１５００Ｈｚの吸音性を向上さ
せるためには、５．５テックス以下の細い繊維を使うの
が好ましい。[0008] The thickness of the synthetic fiber is 1.1 to 110.
Tex's can be preferably used. Thickness is better in terms of processability and handleability, but in consideration of improving productivity with a spreader in particular, 3.3 to 16.5.
Tex's are more preferably used. In addition, from the viewpoint of sound absorption, it is better that the thickness of the synthetic fiber is thin. Particularly, in order to improve the sound absorption of 200 to 1500 Hz which is a low sound range, use a thin fiber of 5.5 tex or less. Is preferred.
【０００９】また、かかる合成繊維の繊維の長さは１０
ｍｍ以上のものであることが好ましい。フィラメントで
もステープルでもよいが、短繊維の場合は、繊維長３０
〜１００ｍｍのものが好ましく使用される。[0009] The length of the synthetic fiber is 10
mm or more is preferable. Filament or staple may be used.
の も の 100 mm is preferably used.
【００１０】なお、かかる合成繊維の繊維断面の形状
は、通常の丸断面、Ｔ型、扁平などの異形断面のいずれ
でもよく、また中空繊維でも差し支えない。また、さら
に捲縮を有する繊維でもよく、たとえば捲縮形態として
は、波形、スパイラル型または両者の折衷型などいずれ
でもよいが、弾性、耐へたり性の点からは、スパイラル
型のものが好ましく使用される。捲縮数が少ないと弾
性、硬さが不足し、多すぎると加工上トラブルが起こる
ため、捲縮数は、好ましくは５〜２００山／２５mm、よ
り好ましくは１０〜５０山／２５ｍｍのものが使用され
る。The shape of the cross section of the synthetic fiber may be any of a normal round cross section, a T-shaped cross section, a flat cross section or the like, or a hollow fiber. Further, a fiber having further crimping may be used. For example, the crimping form may be any of a corrugated shape, a spiral type or a compromise type of both, but from the viewpoint of elasticity and sag resistance, a spiral type is preferable. used. When the number of crimps is small, the elasticity and hardness are insufficient, and when the number is too large, trouble occurs in processing. Therefore, the number of crimps is preferably 5 to 200 ridges / 25 mm, more preferably 10 to 50 ridges / 25 mm. used.
【００１１】本発明の吸音材を構成する主体繊維として
の合成繊維は、高い表面硬度を得るために、繊維相互が
部分的に接着されているものである。その接着は、接着
剤や低融点繊維（接着性繊維）によるもののいずれでも
よい。かかる接着剤としては、合成樹脂、ゴムなどいず
れのものでもよく、形状は、膜状、粒状、液状などいず
れでも使用することができる。加工上、実用上からは、
低融点繊維（接着性繊維）が好ましく使用され、低融点
ポリマからなる繊維を混合して使用するか、ポリエチレ
ンテレフタレートなどの高融点のポリエステルを芯部と
し、イソフタル酸などを共重合した低融点のポリエステ
ルを鞘部とする芯鞘型複合繊維のものを使用することが
できる。好ましくは後者の複合繊維を使用して接着する
のがよい。このような接着性繊維と、中材を構成する主
体繊維としての合成繊維の混合重量比率は、５／９５〜
５０／５０が好ましく、１０／９０〜４０／６０がより
好ましい。接着性繊維の混合比率が５重量％未満では、
接着が十分ではなく、弾性と硬さがなくなる。接着性繊
維は５０重量％以下混合されていれば、十分な接着を与
えることができる。The synthetic fiber as the main fiber constituting the sound absorbing material of the present invention is one in which fibers are partially bonded to each other in order to obtain a high surface hardness. The bonding may be performed by using an adhesive or a low-melting fiber (adhesive fiber). Such an adhesive may be any of synthetic resin, rubber, and the like, and any shape such as a film, a particle, and a liquid can be used. From processing and practical use,
Low-melting fiber (adhesive fiber) is preferably used, and a mixture of low-melting polymer fibers or a high-melting polyester such as polyethylene terephthalate as a core and copolymerized with isophthalic acid or the like is used. A core-sheath type composite fiber having a polyester sheath can be used. Preferably, the latter composite fiber is used for bonding. The mixing weight ratio of such an adhesive fiber and a synthetic fiber as a main fiber constituting the middle material is 5/95 to 5/95.
50/50 is preferred, and 10/90 to 40/60 is more preferred. If the mixing ratio of the adhesive fiber is less than 5% by weight,
Insufficient adhesion results in loss of elasticity and hardness. If the adhesive fibers are mixed in an amount of 50% by weight or less, sufficient adhesion can be provided.
【００１２】接着手段としては、乾燥、圧力、熱などの
方法を採用することができるが、加工の簡易性から、熱
による溶着手段が好ましく使用される。この場合、接着
性繊維としては、主体繊維の融点よりも、好ましくは２
０〜１５０℃低い融点を有するポリマからなる繊維を使
用するのがよい。さらにその一部に酸化防止剤，耐熱安
定剤，耐侯剤，帯電防止剤，難燃剤などを含有する繊維
が含まれてもよい。As the bonding means, a method such as drying, pressure, heat or the like can be adopted, but a welding means by heat is preferably used from the viewpoint of simplicity of processing. In this case, as the adhesive fiber, the melting point of the main fiber is preferably 2 mm.
It is preferable to use a fiber made of a polymer having a melting point lower by 0 to 150 ° C. Further, a part thereof may contain a fiber containing an antioxidant, a heat stabilizer, a weathering agent, an antistatic agent, a flame retardant, and the like.
【００１３】本発明に用いる吸音材は、開綿、開繊機で
主体繊維と接着性繊維を混合した後、カード機に掛けて
ウエッブとし、クロスレイヤーで重合積層してウエッブ
積層体を作り、これをエアースルー型熱処理機で接着繊
維を溶解する手段、または開繊混合された繊維を高圧空
気によって型枠内に詰め込んだ後、熱処理する方法など
により製造することができる。The sound-absorbing material used in the present invention is obtained by mixing a main fiber and an adhesive fiber with a cotton opener and a spreader, then forming the web by using a card machine, and polymerizing and laminating with a cross layer to form a web laminate. Can be produced by means of dissolving the adhesive fibers in an air-through type heat treatment machine, or a method of heat-treating after filling and mixing the opened and mixed fibers in a mold with high-pressure air.
【００１４】本発明においては、上記の繊維集合体表面
に凸部を少なくとも１個以上設けたことを特徴とするも
のである。凸部の加工方法としては、回転する主軸に刃
物を取り付けた各種パターンカッターにより吸音材表面
を削り取り、凹凸を形成する方法、バンドナイフカッタ
ー、立体裁断機等で切り出す方法、凸凹形状の熱プレー
トで吸音材表面を加圧・熱処理する方法、２本の回転す
るローラに種々の形状をした突起部を多数設置し、該ロ
ーラ間で吸音材を圧縮しながらセンターカットするプロ
ファイル加工機などによる方法が適用できる。特にプロ
ファイル加工機では１枚の吸音材から２枚の凸凹吸音材
がカット屑をほとんど出さずに作ることで加工コスト、
生産性面で有効な手段であり、ウレタン凸凹表面加工の
主流でもあるが、高い圧縮回復性と凸凹部の材質均質性
が必要である。すなわち、通常の短繊維を横並び状に積
層固めたのではプロファイル加工しても低い圧縮回復性
のため凸凹が発現し難く、かつ、カット面の短繊維が凸
部頂点付近から剥離し易く、形状維持に難があり、この
傾向は特にプロファイル加工前の母材が薄いとより凸凹
を発現し難い。したがって、本発明では短繊維を縦並び
状に配列するように上記の繊維集合体を配置させること
でカット面からの短繊維剥離もなく、強い圧縮回復性で
加工前の吸音材が薄くても、凸凹の形状も発現し易いと
いう特徴をもつ。In the present invention, at least one projection is provided on the surface of the fiber assembly. As a method of processing the convex part, a method of shaving the surface of the sound absorbing material with various pattern cutters with a blade attached to the rotating main shaft and forming irregularities, a method of cutting out with a band knife cutter, a three-dimensional cutting machine, etc., using a concave and convex hot plate A method of applying pressure and heat treatment to the surface of the sound absorbing material, a method using a profile processing machine or the like, in which a number of protrusions of various shapes are installed on two rotating rollers and the sound absorbing material is center cut while compressing the sound absorbing material between the rollers. Applicable. In particular, with a profile processing machine, two uneven sound absorbing materials are made from one sound absorbing material with almost no cutting waste, so that processing costs,
It is an effective means in terms of productivity and is the mainstream of urethane uneven surface processing, but it requires high compression recovery and uniform material of the unevenness. In other words, when ordinary short fibers are laminated and hardened side by side, even if profile processing is performed, unevenness is unlikely to appear due to low compression recovery, and short fibers on the cut surface are easily peeled off from near the apex of the convex portion. This tendency is difficult to maintain, and this tendency is more difficult to develop, especially when the base material before profile processing is thin. Therefore, in the present invention, by arranging the above fiber assembly so that the short fibers are arranged vertically, there is no short fiber separation from the cut surface, and even if the sound absorbing material before processing is thin with strong compression recovery. In addition, it has a feature that uneven shapes are easily developed.
【００１５】本発明の凸凹は、上記縦並び状に配列され
た繊維集合体の縦方向側の表面に凸凹を設けるととも
に、プロファイル機に供給する母材の伸長に方向性があ
る場合には伸長し難い方向で供給する方が凸凹の形状が
発現し易く、プロファイル加工後の寸法安定性も良い。The unevenness of the present invention is provided by providing unevenness on the surface in the longitudinal direction of the fiber aggregates arranged in a vertically aligned manner, and extending the base material supplied to the profile machine when the elongation is directional. When supplied in a direction that is difficult to perform, uneven shapes are likely to appear, and dimensional stability after profile processing is also good.
【００１６】上記の凸部は円錐状であると繊維クッショ
ンでは初期感触が柔らかく好ましい製品特徴が得られる
が、単に短繊維を繊維長方向に横並び状に配列したもの
では円錐頂上部の繊維は接着するに十分な長さはとれ
ず、剥離は免れず、形状維持ができにくくなる。本発明
では短繊維を繊維長方向に縦並び状に配列固めているた
め、極めてプロファイル加工に適合でき、自由度の高い
凸凹形状を表現できる。When the above-mentioned convex portion is conical, the fiber cushion has a soft initial feel and a preferable product characteristic can be obtained. However, when the short fibers are simply arranged side by side in the fiber length direction, the fibers at the top of the cone are bonded. In this case, the length cannot be sufficiently long, peeling cannot be avoided, and the shape cannot be maintained. In the present invention, the short fibers are arranged vertically in the fiber length direction, so that they can be extremely adapted to the profile processing, and can represent an uneven shape having a high degree of freedom.
【００１７】凹凸の高さ、大きさ、凹凸の数、並び方の
好ましい範囲は本吸音材を保持する設置構造体からの規
制もあるが、凸凹により構成される空気層と嵩（全厚）
を大きくすることが重要である。The preferable range of the height, size, number of irregularities, and arrangement of the irregularities is regulated by the installation structure holding the sound absorbing material, but the air layer formed by the irregularities and the bulk (total thickness)
It is important to increase
【００１８】本発明において吸音材は、耐候、吸水時、
現場での施工作業の形態安定性、強度などの点から、比
重が０．０２ｇ／ｃｃ以上のものが好ましい。比重が
０．０２ｇ／ｃｃ未満のものでは、たとえば、垂直入射
吸音率で見ると、２０００Ｈｚ以下の低周波領域での吸
音率が著しく悪くなる現象がある上に、風合いが柔らか
くなるので、形態が安定せず、さらにまた強力もないた
め、吸水時や現場作業時の形態崩れが発生するので使用
しにくいという問題があり、好ましくないる。なお、製
造コストと作業性を考慮すれば、比重は０．０６ｇ／ｃ
ｃ以下のものが好ましい。In the present invention, the sound-absorbing material is weather-resistant,
From the viewpoint of the form stability and strength of the construction work on site, those having a specific gravity of 0.02 g / cc or more are preferable. When the specific gravity is less than 0.02 g / cc, for example, when viewed in terms of normal incidence sound absorption coefficient, there is a phenomenon that the sound absorption coefficient in a low frequency region of 2000 Hz or less is extremely deteriorated, and the texture becomes soft. Since it is not stable and has no strong property, it has a problem that it is difficult to use because it loses its shape at the time of water absorption or on-site work, which is not preferable. In consideration of manufacturing cost and workability, the specific gravity is 0.06 g / c.
The thing below c is preferred.
【００１９】また、本発明の吸音材は、その構成する繊
維の方向は吸音効率の点からも、構成する単繊維の軸
は、ほぼ音源方向に向いているのが好ましい。すなわ
ち、ほぼ音のする方向と同一方向に繊維が配列している
ことが好ましく、たとえば厚さ５０ｍｍの吸音材が厚さ
方向に音を受ける場合、構成する単繊維の繊維軸は、ほ
ぼ厚さ方向に配列しているものがよい。In the sound-absorbing material of the present invention, it is preferable that the axis of the single fiber constituting the fiber is oriented substantially in the direction of the sound source from the viewpoint of sound absorbing efficiency. That is, it is preferable that the fibers are arranged substantially in the same direction as the direction in which the sound is made. For example, when a sound absorbing material having a thickness of 50 mm receives a sound in the thickness direction, the fiber axis of the single fiber constituting the sound absorbing material is substantially thick. What is arranged in the direction is good.
【００２０】さらに凸凹部が音源方向に対し反対側に設
置した方が吸音効率がよい。このことによって垂直入射
の吸音性だけでなく、斜めより入射する音に対しても、
好ましい吸音特性を示すのである。また、単繊維軸が厚
さ方向に配列していることで必要な厚み方向での形状保
持力があり、かつ表面凸凹により、特に橋梁の裏面吸音
材の場合、雨水などの吸水後の水分の透過がよく、か
つ、凸凹の配列・向きで水抜け性も良く、長時間にわた
って水分を保持することがなく、また通気性も良い。形
状の変化に及ぼす要因が少ないので、耐久性のよいもの
を提供することができる。Further, the sound absorbing efficiency is better when the convex and concave portions are provided on the opposite side to the sound source direction. As a result, not only the sound absorption at normal incidence but also the sound obliquely incident,
It exhibits favorable sound absorption characteristics. In addition, since the single fiber axes are arranged in the thickness direction, there is a necessary shape retaining force in the thickness direction, and due to the unevenness of the surface, particularly in the case of a sound absorbing material on the back side of a bridge, the water absorption after absorbing water such as rainwater. It has good permeation, good unevenness in arrangement and orientation, good water drainage, no water retention for a long time, and good air permeability. Since there are few factors that affect the change in shape, a product with good durability can be provided.
【００２１】さらに本凸凹吸音材を２枚以上重ねて使用
することも吸音特性・軽量化の面からも効果的である。Further, it is effective to use two or more of the present uneven sound absorbing materials in terms of sound absorbing characteristics and weight reduction.
【００２２】なお、本発明の吸音材において、繊維集合
体を構成する単繊維軸がほぼ音源方向に配列しているこ
ととは、例えばカードウエブを略平行に積層し、繊維相
互を部分的に接着させて形成した繊維 構造体を、カー
ドの走行方向に配列した繊維群に対して略垂直に切断せ
しめ、その単繊維軸を音源に向けることが含まれる。さ
らに、高圧空気によって繊維を型枠内に風送、詰め込み
圧縮／熱圧着することにより、単繊維軸を圧縮方向に対
して略垂直な面に沿って略平行に配列させ、その面を音
源方向に向けることが含まれる。この場合、圧縮方向に
対して略垂直な面においては、単繊維軸がその面に沿っ
て略平行に存在しているが、その面内において単繊維軸
はランダムな方向に向いて存在するものも含まれる。In the sound-absorbing material of the present invention, the fact that the single fiber axes constituting the fiber assembly are arranged substantially in the direction of the sound source means that, for example, card webs are laminated substantially in parallel and fibers are partially connected to each other. This involves cutting a fiber structure formed by bonding substantially perpendicularly to a group of fibers arranged in the running direction of the card, and directing the single fiber axis to the sound source. Furthermore, the fibers are blown into the form by high-pressure air, packed and compressed / thermo-compressed, so that the single fiber axes are arranged substantially parallel to a plane substantially perpendicular to the compression direction, and the plane is oriented in the direction of the sound source. Is included. In this case, on a plane substantially perpendicular to the compression direction, the single fiber axis exists substantially parallel along the plane, but within the plane, the single fiber axis exists in a random direction. Is also included.
【００２３】かかる吸音材の厚さは、厚いほど吸音性が
良くなるが、経済性、扱い易さ、吸音材としてのスペー
スから、好ましくは５〜５００ｍｍ、さらに好ましくは
５０〜２００ｍｍの厚さのものが使用される。As for the thickness of the sound absorbing material, the thicker the sound absorbing property, the better the sound absorbing property. However, from the viewpoint of economy, easiness of handling, and space as the sound absorbing material, the thickness is preferably 5 to 500 mm, more preferably 50 to 200 mm. Things are used.
【００２４】難燃性を要求される場合には、合成繊維と
してポリエステル素材のものを用いることが好ましく、
また燃焼性能において「自消性」を示すことが好まし
い。ここで燃焼性能とは後で述べる燃焼試験方法で評価
する。When flame retardancy is required, it is preferable to use synthetic fibers made of polyester.
In addition, it is preferable to exhibit “self-extinguishing property” in combustion performance. Here, the combustion performance is evaluated by a combustion test method described later.
【００２５】本発明の吸音材は、雨水を吸収した後、素
早く排出し、短時間の内に乾燥状態とするためには、吸
音材の水分保持量が０．２ｇ／ｃｍ3 以下であることが
好ましい。水分保持量が０．２ｇ／ｃｍ3 を越えると、
雨水を吸収したときに吸音材が重くなり、変形を起こし
やすく、実用に耐えにくくなることがある。水分保持量
は少ない程よいが、少なくなりすぎると、構成する繊維
相互間において、毛細管現象が生じ、水が抜けにくくな
ることから、０．１ｇ／ｃｍ3 以下であることが好まし
い。The sound absorbing material of the present invention must have a water retention of 0.2 g / cm 3 or less in order to absorb rainwater, drain it quickly, and dry it in a short time. Is preferred. When the water retention exceeds 0.2 g / cm 3 ,
When the rainwater is absorbed, the sound absorbing material becomes heavy, easily deformed, and may not be practically usable. The smaller the amount of water retention, the better. However, if the amount is too small, a capillary phenomenon occurs between the constituent fibers, and it becomes difficult for water to escape, so it is preferably 0.1 g / cm 3 or less.
【００２６】かかる水分保水量は、予めタテ５０ｃｍ、
ヨコ１０ｃｍ、高さ５０ｃｍ（体積２５０００ｃｍ3 ）
の中材について、その重量（Ｗ０）を測定した後、中材
を水中に全面浸水して５分放置後に取り出し、タテ５０
ｃｍ，ヨコ１０ｃｍの面を底面として５分間放置した後
に、再び重量（Ｗ１）を測定し、Ｗ１からＷ０を引いて
中材に含有する水分として算出し、中材１ｃｍ3 あたり
の水分量に換算したものである。The amount of water retention is 50 cm in advance,
Horizontal 10cm, height 50cm (volume 25000cm 3 )
After measuring the weight (W0) of the middle material, the middle material was completely immersed in water, left for 5 minutes, and taken out.
cm, the surface of the horizontal 10cm after standing 5 minutes as the bottom surface, is measured again by weight (W1), is calculated as moisture contained in the medium material drawn from W1 W0, converted to water content per medium material 1 cm 3 It was done.
【００２７】[0027]
【実施例】本発明を実施例によってさらに詳しく説明す
る。The present invention will be described in more detail by way of examples.
【００２８】なお、本発明の用いる評価方法について説
明する。ここで説明されていない評価方法については、
基本的にＪＩＳで定められている方法に準ずる。The evaluation method used in the present invention will be described. For evaluation methods not described here,
Basically, it conforms to the method specified by JIS.
【００２９】表面硬度：ゴム・プラスチック硬度計ＡＳ
ＫＥＲ Ｆ型（高分子計器株式会社製）を、中材の表面
にあてて測定したものである。Surface hardness: Rubber / plastic hardness meter AS
It is measured by applying a KERF type (manufactured by Kobunshi Keiki Co., Ltd.) to the surface of the middle material.
【００３０】通気量 ：ＪＩＳ Ｌ−１０９６に基づ
く。Aeration: Based on JIS L-1096.
【００３１】吸音率 ：ＪＩＳ Ａ−１４０５に基づ
く。ただし測定装置は電子測器株式会社製 自動垂直入
射吸音率測定器タイプ１００４１Ａを用いた。Sound absorption coefficient: based on JIS A-1405. However, the measuring device used was an automatic normal incidence sound absorption coefficient measuring device type 10041A manufactured by Denshi Sokki Co., Ltd.
【００３２】燃焼性能：ＪＩＳ Ｄ−１２０１に基づ
く。Combustion performance: Based on JIS D-1201.
【００３３】ただし、調湿は２２℃×５０％ＲＨで行っ
た。However, the humidity was controlled at 22 ° C. × 50% RH.
【００３４】また、試験片は中材を表皮材で両面包んだ
長さ３５０ｍｍ、幅１００ｍｍ、厚さ１２ｍｍのものを
用いた。The test piece used had a length of 350 mm, a width of 100 mm, and a thickness of 12 mm in which the middle material was wrapped on both sides with a skin material.
【００３５】実施例１ 使用する繊維として、酸化チタンを０．２重量％含有し
たポリエステル原綿Ａ（６．６テックス、繊維長６４ｍ
ｍ）、中空断面、捲縮数１２山／２５mm、捲縮度２０
％、立体捲縮品）と、カーボンを０．２５重量％含有し
たポリエステル原綿Ｂ（３．３テックス、繊維長６４ｍ
ｍ）を、接着性繊維として、ポリエステル芯鞘型複合原
綿Ｃ（芯部にポリエチレンテレフタレートを用い、鞘部
に溶解温度１１０℃の共重合ポリエステルを配したも
の、４．４テックス、繊維長５１ｍｍを用意した。Example 1 As a fiber to be used, polyester raw cotton A (6.6 tex, fiber length 64 m containing 0.2% by weight of titanium oxide)
m), hollow section, number of crimps 12/25 mm, degree of crimp 20
%, Three-dimensional crimped product) and polyester raw cotton B containing 0.25% by weight of carbon (3.3 tex, fiber length 64m)
m) was used as an adhesive fiber, polyester core-sheath type composite raw cotton C (polyethylene terephthalate was used for the core, and a copolymer polyester having a dissolution temperature of 110 ° C. was provided for the sheath, 4.4 tex, and a fiber length of 51 mm). Prepared.
【００３６】これら原綿Ａ、Ｂ、Ｃを、Ａ：Ｂ：Ｃ＝４
０：２０：４０の重量比率でサンドイッチ状に積層し、
開綿機で混合、開綿し、カード機に掛けてウエッブ状と
した。さらにこのウエッブを開繊機に掛けた後、得られ
た開繊繊維を高圧空気によって搬送して、高さ２００c
ｍ、タテ１１０ｃｍ、ヨコ１１０ｃｍの型枠の中に詰め
込んだ。かかる繊維が充填された型枠を、高さ方向より
１００ｃｍ圧縮し、１００ｃｍ角とし、次いで、この型
枠を高圧スチームセッターに入れて、１３０℃、３０分
間熱処理し、その後冷却した。このようにして得た繊維
集合体ブロックを、前記型枠を圧縮した方向と同方向よ
り、８０ｍｍの厚さで、帯状の刃が回転するカッターで
スライスして、１００ｃｍ×１００ｃｍ、厚さ１０ｃｍ
の吸音材を作成した。These raw cottons A, B, and C were converted to A: B: C = 4
Laminated in a sandwich at a weight ratio of 0:20:40,
The mixture was mixed and opened with a cotton opener, and then put on a card machine to form a web. After the web was set on a fiber opening machine, the obtained fiber was conveyed by high-pressure air to a height of 200 c.
m, length 110cm, width 110cm. The mold filled with such fibers was compressed by 100 cm from the height direction to form a 100 cm square, and then the mold was placed in a high-pressure steam setter, heat-treated at 130 ° C. for 30 minutes, and then cooled. The fiber assembly block obtained in this manner was sliced with a cutter having a band-shaped blade rotating at a thickness of 80 mm from the same direction as the direction in which the mold was compressed, and 100 cm × 100 cm, and a thickness of 10 cm.
Sound absorbing material was created.
【００３７】この吸音材比重は０．０３５ｇ／ｃｃであ
り、また表面硬度は７０度であった。この吸音材の中材
を構成する単繊維の軸は、ほぼ厚さの方向に配列してい
た。この吸音材(厚さ１０ｃｍ）をプロファイル加工機
にてその表面がほぼ円錐台状の凸部の高さが３０ｍｍ、
全体の厚みが凸部を含め６５ｍｍのものを２枚に安定し
て造ることができた。結果１０ｃｍ厚さのものから６．
５ｃｍ厚さのものが２枚できた。見かけ嵩（厚さ）は３
０％増加した。音源方向に対する凸部の向きを変え垂直
入射吸音率を測定したところ、図１に示すように、音源
に対し逆対させた方が高い吸音特性を示した。このこと
は必要吸音率を得るためにプロファイル加工しその使用
方法を適正化することで密度を下げ、実質コストを下げ
うることを意味しており、同一厚みにすべくプロファイ
ル前の厚みを薄くし得る。かかる２枚の凸部を音源方向
に対し反対にそれぞれ重ねて使用することができる。図
１に表面凸凹と吸音特性の関係を示す。すなわち、図１
は、本発明の実施例による表面凸凹吸音材の吸音特性評
価結果を示し、全厚とは凸部を含む厚さ、凸正対、逆対
とは音源に対する凸部の方向を示し、正対とは凸部が音
源方向を向き、凸逆対とは音源から離れる方向・反対方
向をむいていることを示している。The specific gravity of the sound absorbing material was 0.035 g / cc, and the surface hardness was 70 degrees. The axes of the single fibers constituting the middle material of the sound absorbing material were arranged in the direction of the thickness. The surface of this sound absorbing material (thickness 10 cm) is approximately 30 mm in height using a profile processing machine,
Two sheets each having a total thickness of 65 mm including the projections could be stably manufactured. Results From 10 cm thick 6.
Two pieces having a thickness of 5 cm were obtained. The apparent bulk (thickness) is 3
Increased by 0%. When the vertical incidence sound absorption coefficient was measured while changing the direction of the convex portion with respect to the sound source direction, as shown in FIG. 1, the sound absorption characteristics were higher when the sound absorption coefficient was opposite to the sound source. This means that by processing the profile to obtain the required sound absorption coefficient and optimizing the method of use, the density can be reduced and the cost can be reduced substantially. obtain. Such two convex portions can be used in a state of being overlapped with each other in the direction opposite to the sound source direction. FIG. 1 shows the relationship between the unevenness of the surface and the sound absorption characteristics. That is, FIG.
Shows the sound absorption characteristics evaluation results of the surface uneven sound absorbing material according to the embodiment of the present invention, the total thickness is the thickness including the convex, the convex opposite, the opposite pair indicates the direction of the convex relative to the sound source, facing directly Indicates that the convex portion faces the sound source direction, and the convex opposite pair faces away from the sound source and in the opposite direction.
【００３８】また、ＪＩＳ Ｄ−１２０１に基づいて、
燃焼性能を評価したところ、燃焼がＡ標線まで達せず
「自消性」の範囲内のものであった。Further, based on JIS D-1201,
When the combustion performance was evaluated, the combustion did not reach the A mark line and was within the range of “self-extinguishing”.
【００３９】[0039]
【発明の効果】本発明によれば、良好なる吸音性と扱い
作業性、吸水排水性、通気性、難燃性、耐久性よく軽量
で、安定した形態の優れた吸音材を提供することができ
る。According to the present invention, it is possible to provide an excellent sound-absorbing material which is excellent in sound absorbing property, handling workability, water-absorbing and draining property, air permeability, flame retardancy, durable, lightweight and stable. it can.
【図１】本発明の実施例における表面凸凹吸音材の吸音
特性評価結果を示すグラフである。FIG. 1 is a graph showing the results of evaluating sound absorbing characteristics of a sound absorbing material having an uneven surface according to an example of the present invention.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｅ０１Ｆ 8/02 Ｅ０１Ｆ 8/00 Ｅ０４Ｂ 1/86 Ｆターム(参考） 2D001 CB05 CC01 CD03 2E001 DF04 HD11 JD04 LA04 4L047 AA21 AA27 AA28 AA29 AB02 BA02 BA09 BB06 BB09 BD01 BD02 CA12 CB03 CC09 CC10 CC14 5D061 AA06 AA22 BB17 BB21 DD11──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) E01F 8/02 E01F 8/00 E04B 1/86 F term (Reference) 2D001 CB05 CC01 CD03 2E001 DF04 HD11 JD04 LA04 4L047 AA21 AA27 AA28 AA29 AB02 BA02 BA09 BB06 BB09 BD01 BD02 CA12 CB03 CC09 CC10 CC14 5D061 AA06 AA22 BB17 BB21 DD11
Claims (2)
着された密度が０．０２ｇ／ｃｃ以上である繊維集合体
から構成され、かつ、該繊維集合体表面に凸部が少なく
とも１個以上設けられていることを特徴とする吸音材。1. A fiber assembly made of synthetic fibers and having a density of 0.02 g / cc or more in which fibers are partially adhered to each other, and at least one projection on the surface of the fiber assembly. A sound absorbing material provided as described above.
音源方向に配列しているかまたはランダムに配列してお
り、前記繊維集合体表面の凸部を有する面が音源とは反
対方向に配設されたことを特徴とする請求項１記載の吸
音材。2. The single fiber axes constituting the fiber assembly are arranged substantially in the direction of the sound source or randomly arranged, and the surface of the fiber assembly having a convex portion has a surface opposite to the direction of the sound source. The sound absorbing material according to claim 1, wherein the sound absorbing material is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000203593A JP2002023764A (en) | 2000-07-05 | 2000-07-05 | Acoustic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000203593A JP2002023764A (en) | 2000-07-05 | 2000-07-05 | Acoustic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002023764A true JP2002023764A (en) | 2002-01-25 |
Family
ID=18700978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000203593A Pending JP2002023764A (en) | 2000-07-05 | 2000-07-05 | Acoustic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002023764A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005282076A (en) * | 2004-03-29 | 2005-10-13 | Panahome Corp | Sound absorption board |
| US7224432B2 (en) | 2004-05-14 | 2007-05-29 | Canon Kabushiki Kaisha | Stage device, exposure apparatus, and device manufacturing method |
| US7321418B2 (en) | 2004-10-14 | 2008-01-22 | Canon Kabushiki Kaisha | Stage apparatus, exposure apparatus, and device manufacturing method |
| JP2012197543A (en) * | 2011-03-23 | 2012-10-18 | Teijin Fibers Ltd | Cushioning structure and bedding |
| JPWO2018180887A1 (en) * | 2017-03-27 | 2020-02-06 | 株式会社Ｈｏｗａ | Soundproof body and silencer for automobile |
| CN110799688A (en) * | 2017-08-31 | 2020-02-14 | 花王株式会社 | Non-woven fabric |
-
2000
- 2000-07-05 JP JP2000203593A patent/JP2002023764A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005282076A (en) * | 2004-03-29 | 2005-10-13 | Panahome Corp | Sound absorption board |
| US7224432B2 (en) | 2004-05-14 | 2007-05-29 | Canon Kabushiki Kaisha | Stage device, exposure apparatus, and device manufacturing method |
| US7321418B2 (en) | 2004-10-14 | 2008-01-22 | Canon Kabushiki Kaisha | Stage apparatus, exposure apparatus, and device manufacturing method |
| JP2012197543A (en) * | 2011-03-23 | 2012-10-18 | Teijin Fibers Ltd | Cushioning structure and bedding |
| JPWO2018180887A1 (en) * | 2017-03-27 | 2020-02-06 | 株式会社Ｈｏｗａ | Soundproof body and silencer for automobile |
| CN110799688A (en) * | 2017-08-31 | 2020-02-14 | 花王株式会社 | Non-woven fabric |
| US11168420B2 (en) | 2017-08-31 | 2021-11-09 | Kao Corporation | Nonwoven fabric |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070015424A1 (en) | Building material having adaptive vapor retarder | |
| AU2010205258B2 (en) | Soundproof panel and soundproof structure | |
| JP3096311B2 (en) | Supporting web for thin roofing fabric | |
| ES2378550T3 (en) | Methods of preparing rolled products | |
| JP2002526296A (en) | Laminated structure with various denier polyester core fibers and randomly oriented reinforcing fibers and method of manufacture | |
| CA2379679A1 (en) | Metal building insulation assembly | |
| WO2007059132A1 (en) | Gypsum board liner providing improved combination of wet adhesion and strength | |
| JP3784064B2 (en) | Growth substrate | |
| US9884438B2 (en) | Impact resistant door facing, method of forming impact resistant door facing, and door formed therewith | |
| JP2002023764A (en) | Acoustic material | |
| CN111954743A (en) | Extruded flashing | |
| JP2021532001A (en) | Folding core structure and method for manufacturing the folding core structure | |
| JP5956785B2 (en) | Crosspiece, sound insulation panel and sound insulation method | |
| JP3465622B2 (en) | Sound absorbing material | |
| JP2000305574A (en) | Sound absorbing material | |
| CA3008472A1 (en) | Flooring mat with entangled filament structure | |
| JP2001032156A (en) | Sound-absorbing material | |
| JP2002079598A (en) | Noise absorbing material and noise absorbing plate using it | |
| JP2002182655A (en) | Acoustic material and acoustic panen using the same | |
| EP3619376B1 (en) | Floating floor system | |
| JP5001726B2 (en) | Ceiling laying material and roof structure | |
| JPH04185754A (en) | Nonwoven fabric for flooring material | |
| JP2005215117A (en) | Sound-absorbing/insulating multilayer fabric and sound-absorbing/insulating product | |
| JP2002115159A (en) | Heat insulating material and method for producing the same | |
| JP6989319B2 (en) | Fiber sheet and its manufacturing method |