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JP2001316964A - Sound-absorbing and damping material - Google Patents

Sound-absorbing and damping material

Info

Publication number
JP2001316964A
JP2001316964A JP2000136151A JP2000136151A JP2001316964A JP 2001316964 A JP2001316964 A JP 2001316964A JP 2000136151 A JP2000136151 A JP 2000136151A JP 2000136151 A JP2000136151 A JP 2000136151A JP 2001316964 A JP2001316964 A JP 2001316964A
Authority
JP
Japan
Prior art keywords
nonwoven fabric
sound
dtex
fiber
melt
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.)
Withdrawn
Application number
JP2000136151A
Other languages
Japanese (ja)
Inventor
Tamotsu Enohara
保 榎原
Tadayoshi Miyasaka
忠与 宮坂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyobo Co Ltd
Original Assignee
Toyobo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyobo Co Ltd filed Critical Toyobo Co Ltd
Priority to JP2000136151A priority Critical patent/JP2001316964A/en
Publication of JP2001316964A publication Critical patent/JP2001316964A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

PROBLEM TO BE SOLVED: To produce a sound-absorbing material having both of excellent sound- absorbing performance and damping property, expecially high damping property. SOLUTION: This sound-absorbing and damping material is composed of a melt blow nonwoven fabric layer having 20-100 g/m2 surface density composed of fiber obtained by dispersing and mixing short fibers having 20-100 g/m2 density and mainly having <=1.0 dtex and a nonwoven fabric layer having 50-1,000 g/m2 surface density and containing high-strength fiber of a polyolefin having 0.1-12 dtex.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、高性能の吸音制振
材料に関し、更に詳しくは、高い制振性を併せ持った吸
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 high-performance sound-absorbing material, and more particularly to a sound-absorbing material having high vibration-damping properties.

【0002】[0002]

【従来の技術】現在、高性能吸音、制振材用途では、良
好な遮音性能及び吸音性能が要求されており、従来用い
られている吸音材料としては、以前より、熱可塑性繊維
(主として、ポリエステル系繊維)及び芯鞘型(芯;高
融点、鞘;低融点)繊維混綿、熱成形(熱融着)不織布
等の特許が提案されている。
2. Description of the Related Art At present, high-performance sound absorbing and damping materials are required to have good sound insulation and sound absorbing properties. Conventionally used sound absorbing materials have been thermoplastic fibers (mainly polyester). Patents have been proposed such as fiber blending, core-sheath type (core; high melting point, sheath; low melting point) fiber blending, and thermoforming (thermal fusion) nonwoven fabric.

【0003】しかしながら、吸音材の遮音性能及び吸音
性能の要求レベルは、年々高くなっており、特に中高音
領域(800〜2000Hz)での性能レベルのアップ
が要求されている。この要求に答える為、目付けのアッ
プが考えられるが、重量増加につながってしまう。ま
た、熱可塑性繊維使用熱成形不織布についても、2〜7
dtexの比較的細い繊維を用いれば、吸音性能のレベルア
ップは可能であるものの、重量の増加は免れない。
[0003] However, the required level of the sound insulation performance and the sound absorption performance of the sound absorbing material is increasing year by year, and particularly, an improvement in the performance level in a middle and high sound range (800 to 2000 Hz) is required. To meet this demand, it is possible to increase the basis weight, but this leads to an increase in weight. In addition, the thermoformed nonwoven fabric using the thermoplastic fiber is also 2-7.
If relatively thin fibers of dtex are used, the level of sound absorption performance can be improved, but the increase in weight is inevitable.

【0004】また、以前から表面層がメルトブロー製法
による不織布による積層体による吸音材が特開平10−
203268号公報の様に提案されている。これは、上
下にポリプロピレンメルトブロー不織布を設置し、これ
に不織布等を挟み込むものである。これは、表面層に該
ポリプロピレンメルトブロー不織布を設置することによ
り、膜共振を起こし吸音作用をおよぼしている。また、
該ポリプロピレンメルトブロー不織布に挟み込まれてい
る不織布は、主に多孔質構造体により構成され、多孔質
構造による吸音作用をもたらす。そして、この二つの吸
音作用の混和によって高い吸音作用を実現している。し
かしながら、この方法も別々に作成した構造体の単なる
組み合わせであり、工程の増加、重量の増加(特に、中
層の多孔質不織布)は免れない。
[0004] A sound absorbing material having a laminate made of a nonwoven fabric whose surface layer is formed by a melt blow method has been disclosed in Japanese Unexamined Patent Publication No.
No. 203,268. In this method, a polypropylene melt-blown non-woven fabric is installed on the upper and lower sides, and the non-woven fabric and the like are sandwiched between the non-woven fabrics. This is because the polypropylene melt-blown non-woven fabric is provided on the surface layer, thereby causing membrane resonance and exerting a sound absorbing effect. Also,
The nonwoven fabric sandwiched between the polypropylene meltblown nonwoven fabrics is mainly composed of a porous structure, and provides a sound absorbing effect by the porous structure. Then, a high sound absorbing effect is realized by mixing the two sound absorbing effects. However, this method is also a mere combination of separately formed structures, and an increase in the number of steps and an increase in weight (particularly, a middle-layer porous nonwoven fabric) are inevitable.

【0005】[0005]

【発明が解決しようとする課題】本発明は、上記課題を
解決すべく見出されたものであり、軽量であるのと共
に、優れた吸音及び制振性能、特に制振性能を併せ持っ
た吸音、制振材を提供することにある。
DISCLOSURE OF THE INVENTION The present invention has been found to solve the above problems, and is not only lightweight, but also has excellent sound absorbing and damping performance, particularly sound absorbing and damping performance. It is to provide a vibration damping material.

【0006】[0006]

【課題を解決する為の手段】即ち、本発明は主として
1.0dtex以下の繊維で構成された面密度が20〜10
0g/m2のメルトブロー不織布層と0.1〜12dtex
のポリオレフィン高強力繊維を含有する面密度50〜1
000g/m2の不織布層から構成されてなることを特
徴とする吸音制振材料である。そして具体的には、メル
トブロー不織布中に1m2当たり20〜100gの短繊
維が分散、混合されてなることを特徴とする上記記載の
吸音制振材料、ポリオレフィン高強力繊維が、ポリエチ
レン高強力繊維であることを特徴とする上記記載の吸音
制振材料、メルトブロー不織布中の短繊維の繊度が1〜
12dtexであることを特徴とする上記記載の吸音制振材
料、メルトブロー不織布中の短繊維がポリエステル短繊
維であることを特徴とする上記記載の吸音制振材料であ
る。
That is, the present invention relates to a method for producing a fiber having a surface density of 20 to 10 mainly comprising fibers of 1.0 dtex or less.
0 g / m 2 meltblown nonwoven fabric layer and 0.1 to 12 dtex
Area density containing polyolefin high-strength fiber of 50-1
It is a sound absorbing and damping material characterized by comprising a non-woven fabric layer of 000 g / m 2 . And specifically, the sound absorbing and damping material described above, wherein the short fiber of 20 to 100 g per 1 m 2 is dispersed and mixed in the melt blown nonwoven fabric, the high-strength polyolefin fiber is a high-strength polyethylene fiber. The sound absorbing and damping material according to the above, wherein the fineness of the short fibers in the melt-blown nonwoven fabric is 1 to
The sound-absorbing vibration-damping material as described above, which is 12 dtex, and the short fiber in the melt-blown nonwoven fabric is a polyester short fiber.

【0007】本発明は、メルトブロー不織布本体の低通
気性を活かしながら、内部に短繊維を混入させることに
より、別に不織布を作成しメルトブロー不織布を用い両
面を貼り合せて得られる従来品に比べて、少ない工程で
より低面密度にて優れた吸音性能を持った吸音材を得る
ことが出来る。更に、本発明では短繊維を用いた不織布
に該メルトブロー不織布を少なくとも片面に貼りつける
ことにより、飛躍的に吸音性能が向上する事が見出され
た。
According to the present invention, a nonwoven fabric is separately prepared by mixing short fibers into the meltblown nonwoven fabric while utilizing the low air permeability of the meltblown nonwoven fabric body. With a small number of steps, a sound absorbing material having excellent sound absorbing performance at a lower surface density can be obtained. Furthermore, in the present invention, it has been found that by adhering the melt-blown nonwoven fabric to at least one surface of the nonwoven fabric using short fibers, the sound absorbing performance is dramatically improved.

【0008】それに加え、短繊維を用いた不織布に用い
る短繊維を0.1〜12dtexのポリオレフィン高強力繊
維とすると吸音性能だけではなく、制振性が飛躍的に向
上する事が分かり本発明に至ったものである。
[0008] In addition, when the short fibers used in the nonwoven fabric using the short fibers are polyolefin high-strength fibers of 0.1 to 12 dtex, not only the sound absorbing performance but also the vibration damping properties are dramatically improved. It has been reached.

【0009】ここでいうポリオレフィン高強力繊維の定
義は、強度が20g/dtex以上であり、また、弾性率が
50g/dtex以上のものをさすが、500g/dtex以上
が望ましい。尚、該ポリオレフィン高強力繊維を用いる
事により、制振性において、振動の特に低周波数(20
0〜500Hz)の振動エネルギー(力)が、高強力及
び高弾性である為に、振動吸収のキャパシティーか高
く、より多く吸収出来るのではないかと考えられる。
尚、ポリオレフィン高強力繊維であれば、何れのものを
用いても差し支え無いが、その中でも、ポリエチレン高
強力繊維を用いることが、より好ましい。
The definition of the high-strength polyolefin fiber herein means a fiber having a strength of 20 g / dtex or more and an elastic modulus of 50 g / dtex or more, and preferably 500 g / dtex or more. In addition, by using the polyolefin high-strength fiber, in terms of vibration damping property, particularly low frequency (20
It is considered that vibration energy (force) of 0 to 500 Hz) has high strength and high elasticity, so that the capacity of vibration absorption is high, and more vibration energy (force) can be absorbed.
In addition, any polyolefin high-strength fiber may be used, but among them, polyethylene high-strength fiber is more preferably used.

【0010】ここで、前記メルトブロー不織布が、比較
的低密度ですむ理由について述べると、メルトブロー不
織布については、従来通りの役割を果たす為、面密度を
減らすことは難しいが内層の不織布については、繊維の
拘束点が減ることにより多孔質吸音性能が向上する。こ
れは、実際の比較は難しいが、高融点熱可塑性短繊維と
低融点熱可塑性短繊維を混綿した後熱成形した不織布に
比べ高融点熱融着短繊維単独でニードルパンチ処理した
不織布の方が、同規格(密度、目付け)では、吸音率の
良好な傾向を示している。これは、ニードルパンチ不織
布の方が、熱成形不織布に比べ繊維同士の拘束点が少な
い為、音の振動を熱に変換し易い為と推察される。この
原理を応用し、メルトブロー不織布内に短繊維を拘束さ
せずに混入させた不織布を、高強力ポリエチレン不織布
の片面に貼付けることにより吸音性に優れた吸音材を得
ることが出来る。
Here, the reason why the melt-blown non-woven fabric requires a relatively low density is as follows. Since the melt-blown non-woven fabric plays a conventional role, it is difficult to reduce the surface density. , The porous sound absorbing performance is improved. This is difficult to actually compare, but the non-woven fabric that is needle-punched with the high-melting heat-fused short fibers alone is better than the non-woven fabric that is formed by blending high-melting thermoplastic short fibers and low-melting thermoplastic short fibers and then thermoforming. In the same standard (density and basis weight), the sound absorption coefficient shows a favorable tendency. This is presumed to be because the needle-punched nonwoven fabric has fewer constraining points between fibers than the thermoformed nonwoven fabric, and thus easily converts sound vibration into heat. Applying this principle, a non-woven fabric obtained by mixing short fibers in a melt-blown non-woven fabric without restraint is attached to one surface of a high-strength polyethylene non-woven fabric, whereby a sound absorbing material having excellent sound absorbing properties can be obtained.

【0011】次に、メルトブロー不織布内に混入させる
短繊維について述べると、太さが0.5〜15dtexであ
れば十分であり特に限定しないが、主に吸音性を向上さ
せたい場合は0.5〜6dtexを用いることが望ましい。
また、一般に比較的細いデニールは吸音性に効果が有
り、また太いデニールは制振性に効果が有る為、細デニ
ール(1〜3dtex)及び太デニール(10〜15dtex)
の混合しても良い。また、制振性に重点を置く場合に
は、太デニール(10〜15dtex)単独でも良い。しか
しながら、0.5dtex未満及び15dtexを超えると十分
短繊維を分散させてメルトブロー不織布内に混入させる
ことが困難になる為、望ましくない。
Next, short fibers to be mixed into the melt-blown non-woven fabric will be described. If the thickness is 0.5 to 15 dtex, it is sufficient and there is no particular limitation. It is desirable to use ~ 6 dtex.
In general, a relatively thin denier has an effect on sound absorption, and a thick denier has an effect on vibration damping. Therefore, a thin denier (1 to 3 dtex) and a thick denier (10 to 15 dtex) are used.
May be mixed. When emphasis is placed on vibration damping, thick denier (10 to 15 dtex) alone may be used. However, if it is less than 0.5 dtex or more than 15 dtex, it becomes difficult to sufficiently disperse the short fibers and mix them into the melt-blown nonwoven fabric.

【0012】更に、メルトブロー不織布の面密度及び該
メルトブロー不織布内に混入させる短繊維の混入量につ
いて述べると次の様になる。まずメルトブロー不織布で
あるが、主に遮音性に効果を持たせる為、面密度が20
〜100g/m2で有れば、十分な性能を得ることが出
来る。しかしながら、20g/m2未満であると十分な
通気度の低下効果が得られず、また、100g/m2
超えると通気度が一定以上低下せず、ある一定レベル以
上の遮音性能が得られなくなる。また、短繊維の混入量
であるについては、吸音性のレベルに合わせ1m2当た
り20〜100g分散、メルトブロー不織布中に混入さ
せれば良い。しかしながら、20g/m 2未満であると
メルトブロー不織布面に短繊維が十分行き渡らず、吸音
性能を満足しない。また、100gを超えるとメルトブ
ロー不織布内に十分分散させる事が出来なくなる為、望
ましくない。更に、混入に当たっては短繊維の拘束点が
増えない様に留意する必要がある。
Further, the areal density of the melt-blown nonwoven fabric and the
The amount of short fibers mixed into the meltblown nonwoven
The following is a description. First with melt blown nonwoven
However, the area density is 20
~ 100g / mTwo, It is possible to obtain sufficient performance.
come. However, 20 g / mTwoLess than enough
The effect of lowering the air permeability cannot be obtained, and 100 g / mTwoTo
If it exceeds, the air permeability does not decrease more than a certain
The above sound insulation performance cannot be obtained. In addition, the amount of mixed short fibers
Is 1 m according to the level of sound absorption.TwoHit
20 to 100 g dispersed in the melt-blown nonwoven fabric
I can do it. However, 20 g / m TwoLess than
Short fibers do not spread enough on the melt-blown non-woven fabric surface, sound absorbing
Not satisfying performance. If it exceeds 100 g, the melt
It is not possible to sufficiently disperse in raw non-woven fabric.
Not good. Furthermore, when mixing, the constraint point of the short fiber is
Care must be taken not to increase.

【0013】尚、メルトブロー不織布の素材について
は、メルトブロー不織布が製造できる、熱可塑性繊維で
あれば良く、特に限定しない。しかしながら、該メルト
ブロー不織布中に混入する短繊維については、本発明に
おいて要求される性能を満たす繊維であり、また、取り
扱いの容易な高強力ポリエチレン短繊維であることが望
ましい。
The material of the melt-blown non-woven fabric is not particularly limited as long as it is a thermoplastic fiber capable of producing a melt-blown non-woven fabric. However, the short fibers mixed into the melt blown nonwoven fabric are preferably fibers satisfying the performance required in the present invention, and are preferably high strength polyethylene short fibers that are easy to handle.

【0014】加えて、メルトブローン不織布の構成繊維
について加えて述べると1dtex以下であることが必須で
ある。これは、1dtexを超えると十分な通気度の低下が
起こらなくなる為である。また、0.5dtex以下であれ
ば、特に限定はされないが、紡糸性(ノズル設計)の面
から0.0001dtex以上が望ましい。
In addition, the constituent fibers of the melt blown nonwoven fabric must be 1 dtex or less. This is because, if it exceeds 1 dtex, a sufficient decrease in air permeability does not occur. There is no particular limitation as long as it is 0.5 dtex or less, but 0.0001 dtex or more is desirable from the viewpoint of spinnability (nozzle design).

【0015】本発明に係る積層体の製造例としては、メ
ルトブロー不織布を製造する際に、充分開繊した短繊維
を吹き込むことで、メルトブロー不織布中に挟まれる形
で均一に分散し、存在せしめることが望ましい。
As an example of the production of a laminate according to the present invention, when a melt-blown non-woven fabric is produced, a sufficiently opened short fiber is blown into the laminate so as to be uniformly dispersed and interposed in the melt-blown non-woven fabric. Is desirable.

【0016】更に、本発明ではポリオレフィン更に好ま
しくはポリエチレン高強力短繊維を用いた不織布に該メ
ルトブロー不織布を少なくとも片面に貼りつけている
が、これにより吸音、制振性能、特に制振性能が飛躍的
に向上している。尚、同繊維規格、同不織布規格のポリ
エステル短繊維不織布を用いれば、吸音性については同
様の結果が得られるが、振動については、ポリオレフィ
ン(ポリエチレン)高強力短繊維を用いた不織布の方
が、良好となっている。具体的には、パネル加振法と一
般に呼ばれる制振性評価方法の、100〜500Hzの
領域において、5〜15dB程度、ポリエステル短繊維
不織布を用いた時に比べ、制振性が優れている傾向が見
られる。これは、前記メルトブロー不織布と該ポリオレ
フィン(ポリエチレン)高強力短繊維不織布との相乗効
果により、振動が効率良く吸収される為ではないかと考
えられる。
Further, in the present invention, the melt blown nonwoven fabric is adhered to at least one surface of a nonwoven fabric using a polyolefin, more preferably a polyethylene high-strength short fiber, whereby the sound absorption and vibration damping performance, especially the vibration damping performance, are remarkably improved. Has improved. The same result can be obtained in terms of sound absorption when using polyester short fiber non-woven fabric of the same fiber standard and the same non-woven fabric standard, but with respect to vibration, non-woven fabric using polyolefin (polyethylene) high-strength short fiber is better. It is good. Specifically, in the vibration damping evaluation method generally called a panel vibration method, in the region of 100 to 500 Hz, about 5 to 15 dB, the vibration damping property tends to be superior to when using a polyester short fiber nonwoven fabric. Can be seen. This is probably because vibration is efficiently absorbed by the synergistic effect of the melt blown nonwoven fabric and the polyolefin (polyethylene) high-strength short fiber nonwoven fabric.

【0017】短繊維を用いた不織布は、1.0〜10dt
exの短繊維を用いた、面密度100〜1000g/m2
の不織布であれば良い。しかしながら、吸音及び制振性
のバランスより2〜4dtexの短繊維が望ましく、更に製
造法としては、より拘束点の少ないニードルパンチにて
製造することが望ましい。しかしながら、高融点繊維に
高融点繊維より少なくとも融点が20℃以上低い低融点
繊維を混合し、熱成形した不織布を用いても、十分な吸
音、制振性能を得ることは可能である。
The non-woven fabric using short fibers is 1.0 to 10 dt.
area density of 100 to 1000 g / m 2 using ex short fibers
Any non-woven fabric may be used. However, short fibers of 2 to 4 dtex are desirable in terms of the balance between sound absorption and vibration damping properties. Further, as a production method, it is desirable to produce with a needle punch having fewer constraint points. However, it is possible to obtain sufficient sound absorption and vibration damping performance even by mixing a high melting fiber with a low melting fiber having a melting point lower than that of the high melting fiber by at least 20 ° C. and using a thermoformed nonwoven fabric.

【0018】[0018]

【実施例】以下に、本発明の実施例、比較例を用いて更
に詳細に説明する。 (実施例1)単糸デニールが0.0001〜0.2dtex
であり、目付けが40g/m2であるポリプロピレン製
メルトブローン不織布を製造する際に、紡糸ノズルより
吐出された溶融ポリマーに、十分開繊された6デニール
のポリエステル短繊維を40g/m2になるように、吹
き込み機を用いて均一に吹き込み、全体で80g/m2
の不織布を作成した。更に2.0dtexのポリエチレン高
強力短繊維を用い、目付け200g/m2、厚み3mm
の不織布を、ニードルパンチ法を用いて作成し、上記の
2種類の不織布を積層し評価試料とした。
The present invention will be described in more detail with reference to the following examples and comparative examples. (Example 1) Single yarn denier is 0.0001 to 0.2 dtex
When manufacturing a polypropylene melt-blown nonwoven fabric having a basis weight of 40 g / m 2 , the melted polymer discharged from the spinning nozzle is supplied with fully denatured 6 denier polyester staple fibers to 40 g / m 2. , Using a blowing machine to blow uniformly, and a total of 80 g / m 2
Was prepared. Further, using a 2.0 dtex polyethylene high-strength short fiber, a basis weight of 200 g / m 2 and a thickness of 3 mm
Was prepared using a needle punch method, and the above two types of nonwoven fabric were laminated to obtain an evaluation sample.

【0019】(比較例1)単糸デニールが0.0001
〜0.2dtexであり、目付けが40g/m2であるポリ
プロピレン製メルトブローン不織布を製造する際に、紡
糸ノズルより吐出された溶融ポリマーに、十分開繊され
た7dtexのポリエステル短繊維を40g/m 2になるよ
うに、吹き込み機を用いて均一に吹き込み、全体で80
g/m2の不織布を作成した。更に2.0dtexのポリエ
ステル短繊維を用い、目付け200g/m2、厚み3m
mの不織布を、ニードルパンチ法を用いて作成し、上記
の2種類の不織布を積層し評価試料とした。
(Comparative Example 1) Single yarn denier is 0.0001
~ 0.2 dtex, and the basis weight is 40 g / mTwoPoly
When manufacturing propylene meltblown nonwoven fabric,
The fiber is sufficiently opened by the molten polymer discharged from the yarn nozzle.
7dtex polyester short fiber 40g / m TwoWill be
As described above, use a blowing machine to blow evenly,
g / mTwoWas prepared. 2.0dtex polyer
Using steal staple fiber, basis weight 200g / mTwo, Thickness 3m
m using the needle punch method
Were laminated and used as evaluation samples.

【0020】(比較例2)2dtexのポリエステル短繊維
を用い、目付け500g/m2、厚み5mmの不織布
を、ニードルパンチ法を用いて作成し、評価試料とし
た。
Comparative Example 2 A nonwoven fabric having a basis weight of 500 g / m 2 and a thickness of 5 mm was prepared by a needle punch method using 2 dtex polyester staple fiber and used as an evaluation sample.

【0021】(評価方法)評価は、吸音率(残響室法;
JIS A 1409に準ずる)評価法及び、パネル加振
法により実施した。尚、パネル加振法は、1辺が500
×400mm、厚さが1.6mmの鋼板パネルをフレー
ムで支持し、その上に試料を設置した後、鋼板パネルを
低周波(0〜500Hz)にて振動させ、この時のフレ
ームの加速度aと試料表面中央部の加速度bを測定し、
両者の比a/bにより振動の減衰度として評価するもの
である。実施例及び比較例についての吸音性及び制振性
の評価結果を表1及び表2に示す。
(Evaluation Method) The evaluation was performed based on the sound absorption coefficient (the reverberation
It was carried out by an evaluation method according to JIS A1409) and a panel vibration method. In the panel vibration method, one side is 500
A steel plate panel having a thickness of 400 mm and a thickness of 1.6 mm is supported by a frame, a sample is placed thereon, and the steel plate panel is vibrated at a low frequency (0 to 500 Hz). Measure the acceleration b at the center of the sample surface,
The ratio a / b of the two is evaluated as the degree of vibration damping. Tables 1 and 2 show the evaluation results of the sound absorbing properties and the vibration damping properties of the examples and the comparative examples.

【0022】[0022]

【表1】 [Table 1]

【0023】[0023]

【表2】 [Table 2]

【0024】[0024]

【発明の効果】本発明によると、優れた吸音性能及び制
振性、特に高い制振性を併せ持った吸音材を提供するこ
とが出来る。
According to the present invention, it is possible to provide a sound-absorbing material having both excellent sound-absorbing performance and excellent vibration-damping properties, especially high vibration-damping properties.

───────────────────────────────────────────────────── 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) G10K 11/162 G10K 11/16 A Fターム(参考) 4F100 AK03B AK04B AK07 AK41A BA02 DG03A DG15A DG15B DG19A EC09 JA13A JA13B JA20A JA20B JH01 JH02 JK01B YY00A YY00B 4L032 AA05 AA07 AB04 AC01 BD05 DA00 EA00 EA06 4L047 AA14 AA21 AA28 AB02 AB03 AB08 AB10 BA03 CA05 CB01 CB03 CC14 EA05 5D061 AA06 AA22 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) G10K 11/162 G10K 11/16 A F term (reference) 4F100 AK03B AK04B AK07 AK41A BA02 DG03A DG15A DG15B DG19A EC09 JA13A JA13B JA20A JA20B JH01 JH02 JK01B YY00A YY00B 4L032 AA05 AA07 AB04 AC01 BD05 DA00 EA00 EA06 4L047 AA14 AA21 AA28 AB02 AB03 AB08 AB10 BA03 CA05 CB01 CB03 CC14 EA05 5D061 AA06 AA22

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】主として1.0dtex以下の繊維で構成され
た面密度が20〜100g/m2のメルトブロー不織布
層と0.1〜12dtexのポリオレフィン高強力繊維を含
有する面密度50〜1000g/m2の不織布層から構
成されてなることを特徴とする吸音制振材料。
An areal density mainly comprising fibers of 1.0 dtex or less and having a surface density of 20 to 100 g / m 2 and a surface density of 50 to 1000 g / m 2 containing a polyolefin high-strength fiber of 0.1 to 12 dtex. A sound absorbing and damping material characterized by comprising two nonwoven fabric layers.
【請求項2】メルトブロー不織布中に1m2当たり20
〜100gの短繊維が分散、混合されてなることを特徴
とする請求項1記載の吸音制振材料。
2. A 1 m 2 per 20 during the melt-blown nonwoven fabric
The sound-absorbing vibration-damping material according to claim 1, wherein 短 100 g of short fibers are dispersed and mixed.
【請求項3】ポリオレフィン高強力繊維が、ポリエチレ
ン高強力繊維であることを特徴とする請求項1記載の吸
音制振材料。
3. The sound absorbing and damping material according to claim 1, wherein the polyolefin high-strength fiber is a polyethylene high-strength fiber.
【請求項4】メルトブロー不織布中の短繊維の繊度が1
〜12dtexであることを特徴とする請求項2記載の吸音
制振材料。
4. The fineness of the short fiber in the melt blown nonwoven fabric is 1
3. The sound absorbing and damping material according to claim 2, wherein the number is from 12 to 12 dtex.
【請求項5】メルトブロー不織布中の短繊維がポリエス
テル短繊維であることを特徴とする請求項2記載の吸音
制振材料。
5. The sound absorbing and damping material according to claim 2, wherein the short fibers in the melt blown nonwoven fabric are polyester short fibers.
JP2000136151A 2000-05-09 2000-05-09 Sound-absorbing and damping material Withdrawn JP2001316964A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000136151A JP2001316964A (en) 2000-05-09 2000-05-09 Sound-absorbing and damping material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000136151A JP2001316964A (en) 2000-05-09 2000-05-09 Sound-absorbing and damping material

Publications (1)

Publication Number Publication Date
JP2001316964A true JP2001316964A (en) 2001-11-16

Family

ID=18644139

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000136151A Withdrawn JP2001316964A (en) 2000-05-09 2000-05-09 Sound-absorbing and damping material

Country Status (1)

Country Link
JP (1) JP2001316964A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2407296A (en) * 2003-10-22 2005-04-27 Auto Insulations Ltd Composite sheet insulation
GB2418643A (en) * 2003-10-22 2006-04-05 Auto Insulations Ltd Composite sheet insulation
US20220148551A1 (en) * 2019-03-07 2022-05-12 Toray Industries, Inc. Sound-absorbing material nonwoven fabric, sound-absorbing material, and method for producing sound-absorbing material nonwoven fabric

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2407296A (en) * 2003-10-22 2005-04-27 Auto Insulations Ltd Composite sheet insulation
GB2407296B (en) * 2003-10-22 2006-03-08 Auto Insulations Ltd Composite insulation
GB2418643A (en) * 2003-10-22 2006-04-05 Auto Insulations Ltd Composite sheet insulation
GB2418643B (en) * 2003-10-22 2006-09-06 Auto Insulations Ltd Composite insulation
US20220148551A1 (en) * 2019-03-07 2022-05-12 Toray Industries, Inc. Sound-absorbing material nonwoven fabric, sound-absorbing material, and method for producing sound-absorbing material nonwoven fabric
US12008981B2 (en) * 2019-03-07 2024-06-11 Toray Industries, Inc. Sound-absorbing material nonwoven fabric, sound-absorbing material, and method for producing sound-absorbing material nonwoven fabric

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