JP2003049351A - High-performance acoustic material - Google Patents
High-performance acoustic materialInfo
- Publication number
- JP2003049351A JP2003049351A JP2001232308A JP2001232308A JP2003049351A JP 2003049351 A JP2003049351 A JP 2003049351A JP 2001232308 A JP2001232308 A JP 2001232308A JP 2001232308 A JP2001232308 A JP 2001232308A JP 2003049351 A JP2003049351 A JP 2003049351A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- melting point
- nonwoven fabric
- polyester
- dtex
- 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- Withdrawn
Links
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、吸音材に関し、さ
らに詳しくは、周波数１０００〜４０００Ｈｚにおける
吸音性に優れ、特に自動車用途に適した高性能吸音材に
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, and more particularly to a high performance sound absorbing material which is excellent in sound absorbing property at a frequency of 1000 to 4000 Hz and which is particularly suitable for automobile applications.
【０００２】[0002]
【従来の技術】自動車用などの高性能吸音材用途で、従
来用いられている吸音材料としては、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）繊維を混綿し、熱成形（熱融着）した
不織布等が提案されているが、吸音材の吸音性能の要求
レベルは、年々高くなっており、特に中高音領域（１０
００〜４０００Ｈｚ）での性能レベルのアップが要求さ
れている。この要求に対して、目付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、２〜６ｄｔ
ｅｘの比較的細い繊度品を用いれば、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。さ
らに、従来品では、高い吸音性であるために必要とされ
る特定の周波数範囲での吸音性が不充分であった。2. Description of the Related Art Thermoplastic fibers (mainly polyester fibers) and core-sheath type (core: high melting point, sheath: low melting point) are used as sound absorbing materials conventionally used for high performance sound absorbing materials such as automobiles. ) A non-woven fabric in which fibers are mixed and thermoformed (heat-bonded) has been proposed, but the required level of the sound absorbing performance of the sound absorbing material is increasing year by year, and particularly in the mid-high range (10
It is required to improve the performance level at 0 to 4000 Hz). In response to this demand, it is possible to increase the basis weight, but this leads to an increase in weight. Also, 2-6 dt
If a finer ex product is used, the level of sound absorption performance can be improved, but an increase in weight is inevitable. Further, the conventional products have insufficient sound absorption in a specific frequency range required for high sound absorption.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記課題を
解決する為に見出されたものであり、優れた吸音性、特
に周波数１０００〜４０００Ｈｚにおいて優れた吸音性
を有する、主に自動車用途に適した吸音材を提供するも
のである。DISCLOSURE OF THE INVENTION The present invention has been found to solve the above-mentioned problems, and it has excellent sound absorbing properties, particularly excellent sound absorbing properties at a frequency of 1000 to 4000 Hz, and is mainly used for automobiles. The present invention provides a sound absorbing material suitable for.
【０００４】[0004]
【課題を解決するための手段】即ち、本発明は、以下の
とおりである。
（１）１．０〜１２ｄｔｅｘのポリエステル系繊維を用
いた、見掛けの厚さが１０〜３０ｍｍのポリエステル系
繊維不織布の片面に、主に１．０ｄｔｅｘ以下の繊維で
構成され、目付が１０〜１００ｇ／ｍ2で、更にＪＩＳ
Ｌ−１０９６に基づいて測定される通気度が５〜５０ｃ
ｃ／ｃｍ2／ｓｅｃであるメルトブロー極細繊維不織布
が積層され、周波数１０００〜４０００Ｈｚにおける吸
音性に優れることを特徴とする自動車用高性能吸音材。
（２）前記ポリエステル系繊維不織布が、高融点繊維及
び高融点繊維より２０℃以上融点が低い低融点繊維の混
合不織布であり、更に低融点繊維の溶融により接着され
ていることを特徴とする前記１記載の自動車用高性能吸
音材。
（３）前記メルトブロー極細繊維不織布が、ポリブチレ
ンテレフタレートまたはポリエステルエラストマー系極
細繊維不織布であることを特徴とする前記１または２記
載の自動車用高性能吸音材。[Means for Solving the Problems] That is, the present invention is as follows. (1) A polyester fiber non-woven fabric having an apparent thickness of 10 to 30 mm, which uses a polyester fiber of 1.0 to 12 dtex, is mainly composed of fibers of 1.0 dtex or less and has a basis weight of 10 to 100 g. / M 2 and JIS
The air permeability measured based on L-1096 is 5 to 50c.
A high-performance sound-absorbing material for automobiles, characterized in that a melt-blown ultrafine fiber non-woven fabric of c / cm 2 / sec is laminated and has excellent sound absorption at a frequency of 1000 to 4000 Hz. (2) The polyester fiber non-woven fabric is a mixed non-woven fabric of high-melting point fibers and low-melting point fibers having a melting point lower than that of high-melting point fibers by 20 ° C. or more, and further bonded by melting the low-melting point fibers. 1. A high performance sound absorbing material for automobiles according to 1. (3) The high-performance sound absorbing material for automobiles according to 1 or 2, wherein the melt-blown ultrafine fiber nonwoven fabric is a polybutylene terephthalate or polyester elastomer-based ultrafine fiber nonwoven fabric.
【０００５】本発明は、上述のように、メルトブロー不
織布本体の低通気性を活かしながら、ポリエステル系繊
維不織布を片面に積層、貼り付ける事により、１０００
〜４０００Ｈｚにおいて優れた吸音性を有した自動車用
に好適な吸音材を得るものであり、メルトブロー不織布
にポリエステル系繊維不織布を積層して特定の背後空気
層を持たせることにより、特定の周波数における高い吸
音性を発現させるのである。As described above, according to the present invention, while utilizing the low air permeability of the meltblown nonwoven fabric body, by laminating and sticking the polyester fiber nonwoven fabric on one side, 1000
It is intended to obtain a sound absorbing material suitable for automobiles having excellent sound absorbing property at a frequency of up to 4000 Hz. By laminating a polyester fiber non-woven fabric on a melt blown non-woven fabric so as to have a particular back air layer, it is possible to obtain a high sound at a particular frequency. The sound absorption is expressed.
【０００６】[0006]
【発明の実施の形態】本発明におけるメルトブロー極細
繊維不織布の素材は、特に限定はないが、コスト及び生
産性の観点からポリオレフィン系繊維を用いる事が望ま
しい。しかしながら、耐熱性を向上させる場合はポリブ
チレンテレフタレート（ＰＢＴ）系、伸縮性（成形性）
を向上させる場合はポリエステルエラストマー（ＰＥ
Ｌ）系を用いることが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The material of the melt-blown ultrafine fiber nonwoven fabric in the present invention is not particularly limited, but it is desirable to use a polyolefin fiber from the viewpoint of cost and productivity. However, when heat resistance is to be improved, polybutylene terephthalate (PBT) system, stretchability (formability)
Polyester elastomer (PE
It is preferable to use system L).
【０００７】また、メルトブローン極細繊維不織布の構
成繊維の繊度は、平均繊度が１ｄｔｅｘ以下であること
が必要である。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、０．５ｄ
ｔｅｘ以下であれば、特に限定はされないが、紡糸性の
面から０．０００１ｄｔｅｘ以上が望ましい。The average fineness of the constituent fibers of the meltblown ultrafine fiber nonwoven fabric must be 1 dtex or less. This is because if it exceeds 1 dtex, a sufficient decrease in air permeability will not occur. Also, 0.5d
Although it is not particularly limited as long as it is tex or less, 0.0001 dtex or more is desirable from the viewpoint of spinnability.
【０００８】本発明におけるポリエステル系繊維不織布
は、背後空気層を得る役割のため、1．０〜１０ｄｔｅ
ｘのポリエチレンテレフタレート（ＰＥＴ）などのポリ
エステル短繊維を用い、厚さが１０〜３０ｍｍの不織布
であれば良く、目付については特に制約はない。しかし
ながら、不織布の強度の点からポリエステル系繊維中に
高融点繊維及び高融点繊維より２０℃以上融点が低い低
融点繊維の混合不織布であり、更に低融点繊維の溶融に
より接着されていることが望ましい。尚、低融点繊維の
混率については、強度及び形態（厚み）の保持が出来れ
ば、特に限定はない。The polyester fiber non-woven fabric in the present invention plays a role of obtaining a back air layer, and therefore has a thickness of 1.0 to 10 dte.
A non-woven fabric having a thickness of 10 to 30 mm using polyester short fibers such as polyethylene terephthalate (PET) of x and the basis weight is not particularly limited. However, from the viewpoint of the strength of the nonwoven fabric, it is desirable that the polyester fiber is a mixed nonwoven fabric of a high melting point fiber and a low melting point fiber having a melting point of 20 ° C. or more lower than that of the high melting point fiber, and further bonded by melting the low melting point fiber. . The mixing ratio of the low melting point fibers is not particularly limited as long as the strength and the form (thickness) can be maintained.
【０００９】本発明におけるポリエステル系繊維不織布
は、更にニードルパンチにて製造することも可能である
が、低目付品（概ね１０００ｇ／ｍ2未満）では、強度
及び形態（厚み）保持性の問題が起こる可能性がある。The polyester fiber non-woven fabric of the present invention can be further manufactured by needle punching, but with a low basis weight product (generally less than 1000 g / m 2 ), there are problems of strength and shape (thickness) retention. It can happen.
【００１０】ポリエステル系繊維不織布と極細繊維不織
布との貼合せ法は、ポリエステル系繊維不織布及び極細
不織布の構成繊維よりも融点の低い熱可塑性樹脂を両不
織布間に介在、溶融させ接着させることが望ましい。該
熱可塑性樹脂の形態は、パウダー状でも、繊維状でも差
し支えない。パウダー状の場合には、極細繊維不織布上
に均一に散布することが望ましく、繊維状の場合は、均
一なウェブ状にしたのち介在させ、溶融させることが望
ましい。また、繊維状の場合には、ポリエステル系不織
布中に混綿させた高融点繊維より２０℃以上融点が低い
低融点繊維を利用し、溶融接着させても良い。As a method for laminating the polyester fiber non-woven fabric and the ultrafine fiber non-woven fabric, it is desirable that a thermoplastic resin having a melting point lower than that of the constituent fibers of the polyester fiber non-woven fabric and the ultrafine non-woven fabric is interposed and melted between both non-woven fabrics to be bonded. . The form of the thermoplastic resin may be powdery or fibrous. In the case of a powder, it is desirable to uniformly disperse it on the ultrafine fiber non-woven fabric, and in the case of a fibrous state, it is desirable to form a uniform web, and then interpose and melt. In the case of a fibrous material, low melting point fibers having a melting point of 20 ° C. or more lower than the high melting point fibers mixed in the polyester non-woven fabric may be used for fusion bonding.
【００１１】また、ニードルパンチ法にて製造する場合
は、ポリエステル系不織布製造時に極細不織布をポリエ
ステル系不織布に接触させ、ニードルパンチにて貼り合
せすることも可能である。Further, in the case of manufacturing by the needle punch method, it is also possible to bring the ultrafine nonwoven fabric into contact with the polyester nonwoven fabric at the time of producing the polyester nonwoven fabric and bond them by needle punching.
【００１２】次に本発明における吸音の機構について簡
単に説明すると以下の様になる。まず、極細繊維不織布
単独では、高吸音性能を得ることは不可能である。しか
しながら、背後空気層を持たせることにより、高吸音性
を得ることが出来る。更に、背後空気層の距離を変化さ
せることにより、特定の周波数領域について高い吸音性
を得ることが出来る。理論上では、各周波数の１／４λ
地点が、最大の吸音性を示す位置といわれている。例え
ば、本発明で対象としている周波数での、最適背後空気
層は、１０００Ｈｚにおいて８５ｍｍ、４０００Ｈｚに
おいて２０ｍｍ、８０００Ｈｚにおいて１０ｍｍであ
る。The sound absorbing mechanism of the present invention will be briefly described below. First, it is impossible to obtain high sound absorbing performance by using the ultrafine fiber nonwoven fabric alone. However, by providing a back air layer, high sound absorption can be obtained. Furthermore, by changing the distance of the back air layer, it is possible to obtain high sound absorption in a specific frequency range. Theoretically, 1 / 4λ of each frequency
It is said that the point shows the maximum sound absorption. For example, at the frequencies of interest in the present invention, the optimal back air layer is 85 mm at 1000 Hz, 20 mm at 4000 Hz and 10 mm at 8000 Hz.
【００１３】しかしながら、実際には理論上とは異な
り、吸音性が最大となる周波数は、背後空気層３０ｍｍ
において１０００Ｈｚ〜１２５０Ｈｚ、背後空気層２０
ｍｍにおいて１６００Ｈｚ〜３１５０Ｈｚ、背後空気層
１０ｍｍにおいて３１５０〜５０００Ｈｚである事が、
種々の検討により見出された。従って、自動車用途にお
いて要求される１０００〜４０００Ｈｚの周波数領域に
おいて高吸音性を得る為には、背後空気層が１０〜３０
ｍｍであることが必要であることを新規に見出した。However, in reality, unlike the theory, the frequency at which the sound absorption is maximized is 30 mm behind the back air layer.
At 1000 Hz to 1250 Hz, behind air layer 20
mm is 1600 Hz to 3150 Hz, and a back air layer of 10 mm is 3150 to 5000 Hz.
It was found by various studies. Therefore, in order to obtain high sound absorption in the frequency range of 1000 to 4000 Hz which is required for automobile applications, the back air layer is 10 to 30
It was newly found that it is necessary to be mm.
【００１４】更に背後空気層を持たせる手段として種々
検討の結果、ポリエステル系繊維不織布が、最も安価に
背後空気層を得ることが出来ることを見出した。その
他、極細繊維不織布を安定させ支持できるものであれ
ば、同様の吸音性を得ることは可能であるが、コストが
上昇する可能性が有る。As a result of various studies as means for providing a back air layer, it was found that a polyester fiber nonwoven fabric can obtain the back air layer at the lowest cost. In addition, as long as the ultrafine fiber nonwoven fabric can be stably supported, the same sound absorbing property can be obtained, but the cost may increase.
【００１５】本発明における極細繊維不織布は、目付が
１０〜１００ｇ／ｍ2であり、更にＪＩＳ Ｌ−１０９６
に基づいて測定される通気度が、５〜５０ｃｃ／ｃｍ2
／ｓｅｃであることが必須である。目付が１０ｇ／ｍ2
未満になると吸音性能が低下し、自動車用吸音材用途に
適さなくなる。また、１００ｇ／ｍ2を超えると一定レ
ベル以上吸音性が向上しなくなる。また、通気度につい
ても５０ｃｃ／ｃｍ2／ｓｅｃ以上になると吸音性能が
低下、自動車用吸音材用途に不適になる。また、５ｃｃ
／ｃｍ2／ｓｅｃ未満になるとそれ以上吸音性が向上し
なくなり、０ｃｃ／ｃｍ2／ｓｅｃとなると、反射現象
が発生し、全く吸音性を得ることが出来なくなる。The ultrafine fiber nonwoven fabric of the present invention has a basis weight of 10 to 100 g / m 2 , and further has JIS L-1096.
Has an air permeability of 5 to 50 cc / cm 2
/ Sec is essential. Unit weight is 10g / m 2
When it is less than the above range, the sound absorbing performance is deteriorated and it becomes unsuitable for use as a sound absorbing material for automobile. Further, if it exceeds 100 g / m 2 , the sound absorption will not be improved beyond a certain level. Further, when the air permeability is 50 cc / cm 2 / sec or more, the sound absorbing performance is deteriorated, which makes it unsuitable for use as a sound absorbing material for vehicles. Also, 5 cc
When it is less than / cm 2 / sec, the sound absorbing property is not improved any more, and when it is 0 cc / cm 2 / sec, a reflection phenomenon occurs and no sound absorbing property can be obtained.
【００１６】[0016]
【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）２．２ｄｔｅｘのポリエステル繊維２０質
量％、６．７ｄｔｅｘのポリエステル繊維３０質量％及
び２．２ｄｔｅｘの低融点／ポリエステル複合繊維（芯
鞘型）５０質量％を混綿し、カード機を用いて目付２０
０ｇ／ｍ2相当のウェブを作成した。その上にポリプロ
ピレン（ＰＰ）製極細繊維不織布７０ｇ／ｍ2を積層
し、雰囲気温度１５０℃にて厚さ２０ｍｍで、加熱成形
及び貼り合せを実施した。EXAMPLES The present invention will be described in more detail below with reference to examples and comparative examples. (Example 1) 20% by mass of 2.2 dtex polyester fiber, 30% by mass of 6.7 dtex polyester fiber and 50% by mass of 2.2 dtex low melting point / polyester composite fiber (core-sheath type) were mixed and a card machine was used. Use weight 20
A web equivalent to 0 g / m 2 was created. A polypropylene (PP) ultrafine fiber non-woven fabric 70 g / m 2 was laminated thereon, and heat molding and bonding were performed at an ambient temperature of 150 ° C. and a thickness of 20 mm.
【００１７】（実施例２）２．２ｄｔｅｘのポリエステ
ル繊維２０質量％、６．７ｄｔｅｘのポリエステル繊維
３０質量％及び２．２ｄｔｅｘの低融点／ポリエステル
複合繊維（芯鞘型）５０質量％を混綿し、カード機を用
いて目付１３０ｇ／ｍ2相当のウェブを作成した。その
上にＰＰ製極細繊維不織布７０ｇ／ｍ2を積層し、雰囲
気温度１５０℃にて厚さ１０ｍｍで、加熱成形及び貼り
合せを実施した。Example 2 20% by mass of 2.2 dtex polyester fiber, 30% by mass of 6.7 dtex polyester fiber and 50% by mass of 2.2 dtex low melting point / polyester composite fiber (core-sheath type) were mixed, A web having a basis weight of 130 g / m 2 was prepared using a card machine. 70 g / m 2 of PP ultrafine fiber non-woven fabric was laminated thereon, and heat molding and bonding were performed at an ambient temperature of 150 ° C. and a thickness of 10 mm.
【００１８】（実施例３）２．２ｄｔｅｘのポリエステ
ル繊維５０質量％、６．７ｄｔｅｘのポリエステル繊維
３０質量％及び２．２ｄｔｅｘの低融点／ポリエステル
複合繊維（芯鞘型）２０％を混綿し、カード機を用いて
目付９８０ｇ／ｍ2相当のウェブを作成した。その上に
２．２ｄｔｅｘの低融点／ポリエステル複合繊維（芯鞘
型）１００質量％の目付２０ｇ／ｍ2のウェブを積層
し、更にその上にＰＰ製極細繊維不織布７０ｇ／ｍ2を
積層し、雰囲気温度１５０℃にて厚さ２０ｍｍで、加熱
成形及び貼り合せを実施した。EXAMPLE 3 50% by mass of 2.2 dtex polyester fiber, 30% by mass of 6.7 dtex polyester fiber and 20% of 2.2 dtex low melting point / polyester composite fiber (core-sheath type) were mixed and carded. A machine having a basis weight of 980 g / m 2 was prepared using a machine. A 2.2 dtex low-melting point / polyester composite fiber (core-sheath type) 100% by mass of a web having a basis weight of 20 g / m 2 was laminated thereon, and further a PP ultrafine fiber nonwoven fabric 70 g / m 2 was laminated thereon. Thermoforming and bonding were performed at an ambient temperature of 150 ° C. and a thickness of 20 mm.
【００１９】（実施例４）２．２ｄｔｅｘのポリエステ
ル繊維２０質量％、６．７ｄｔｅｘのポリエステル繊維
３０質量％及び２．２ｄｔｅｘの低融点／ポリエステル
複合繊維（芯鞘型）５０％を混綿し、カード機を用いて
目付２００ｇ／ｍ2相当のウェブを作成した。その上に
ＰＰ製極細繊維不織布４０ｇ／ｍ2を積層し、雰囲気温
度１５０℃にて厚さ２０ｍｍで、加熱成形及び貼り合せ
を実施した。Example 4 20% by mass of 2.2 dtex polyester fibers, 30% by mass of 6.7 dtex polyester fibers and 50% of 2.2 dtex low melting point / polyester composite fibers (core-sheath type) were mixed and carded. A machine having a basis weight of 200 g / m 2 was prepared using a machine. 40 g / m 2 of an extra fine fiber nonwoven fabric made of PP was laminated thereon, and heat molding and bonding were carried out at an ambient temperature of 150 ° C. and a thickness of 20 mm.
【００２０】（実施例５）２．２ｄｔｅｘのポリエステ
ル繊維２０質量％、６．７ｄｔｅｘのポリエステル繊維
３０質量％及び２．２ｄｔｅｘの低融点／ポリエステル
複合繊維（芯鞘型）５０質量％を混綿し、カード機を用
いて目付２００ｇ／ｍ2相当のウェブを作成した。その
上にＰＰ製極細繊維不織布２０ｇ／ｍ2を積層し、雰囲
気温度１５０℃にて厚さ２０ｍｍで、加熱成形及び貼り
合せを実施した。(Example 5) 20% by mass of 2.2 dtex polyester fiber, 30% by mass of 6.7 dtex polyester fiber and 50% by mass of 2.2 dtex low melting point / polyester composite fiber (core-sheath type) were mixed, A web having a basis weight of 200 g / m 2 was created using a card machine. 20 g / m 2 of PP ultrafine fiber nonwoven fabric was laminated on it, and heat molding and bonding were carried out at an ambient temperature of 150 ° C. and a thickness of 20 mm.
【００２１】（実施例６）１６．７ｄｔｅｘのポリエス
テル繊維７０質量％及び４．４ｄｔｅｘの低融点／ポリ
エステル複合繊維（芯鞘型）３０質量％を混綿し、カー
ド機を用いて目付１０００ｇ／ｍ2相当のウェブを作成
した。その上に低融点接着剤（融点１０５℃）を２０ｇ
／ｍ2散布、更にＰＰ製極細繊維不織布７０ｇ／ｍ2を積
層し、雰囲気温度１５０℃にて厚さ１０ｍｍで、加熱成
形及び貼り合せを実施した。(Example 6) 70% by mass of 16.7 dtex polyester fiber and 30% by mass of 4.4 dtex low melting point / polyester composite fiber (core-sheath type) were mixed and a basis weight of 1000 g / m 2 was measured using a card machine. Created a considerable web. 20g of low melting point adhesive (melting point 105 ° C) on it
/ M 2 was sprayed, and further 70 g / m 2 of PP ultrafine fiber nonwoven fabric was laminated, and heat molding and bonding were performed at an ambient temperature of 150 ° C. and a thickness of 10 mm.
【００２２】（実施例７）１６．７ｄｔｅｘのポリエス
テル繊維１００質量％をカード機を用いて目付１０００
ｇ／ｍ2相当のウェブを作成し、ニードルパンチ法によ
り厚さ１０ｍｍの不織布を作成した。その上に低融点接
着剤（融点１０５℃）を２０ｇ／ｍ2散布、更にＰＰ製
極細繊維不織布７０ｇ／ｍ2を積層し、雰囲気温度１５
０℃にて厚さ１０ｍｍで、貼り合せを実施した。(Example 7) 100% by mass of 16.7 dtex polyester fiber was used for a unit weight of 1000 using a card machine.
A web equivalent to g / m 2 was prepared, and a nonwoven fabric having a thickness of 10 mm was prepared by the needle punching method. 20 g / m 2 of a low melting point adhesive (melting point 105 ° C.) was sprinkled on it, and further 70 g / m 2 of PP ultrafine fiber non-woven fabric was laminated at an ambient temperature of 15
Bonding was performed at 0 ° C. with a thickness of 10 mm.
【００２３】（実施例８）ＰＰ製極細繊維不織布７０ｇ
／ｍ2上に１６．７ｄｔｅｘのポリエステル繊維１００
％をカード機を用いて目付１２００ｇ／ｍ2相当のウェ
ブを作成、積層し、ニードルパンチ法により貼り合せ及
び厚さ１０ｍｍの不織布を作成した。Example 8 PP ultrafine fiber nonwoven fabric 70 g
16.7 dtex polyester fiber 100 / m 2
A web having a basis weight of 1200 g / m 2 was prepared by using a card machine, laminated, laminated by a needle punch method, and a nonwoven fabric having a thickness of 10 mm was prepared.
【００２４】（比較例１）２．２ｄｔｅｘのポリエステ
ル繊維２０質量％、６．７ｄｔｅｘのポリエステル繊維
３０質量％及び２．２ｄｔｅｘの低融点／ポリエステル
複合繊維（芯鞘型）５０％を混綿し、カード機を用いて
目付２００ｇ／ｍ2相当のウェブを作成した。その上に
ＰＰ製極細繊維不織布７０ｇ／ｍ2を積層し、雰囲気温
度１５０℃にて厚さ５ｍｍで、加熱成形及び貼り合せを
実施した。Comparative Example 1 20% by mass of 2.2 dtex polyester fiber, 30% by mass of 6.7 dtex polyester fiber and 50% of 2.2 dtex low melting point / polyester composite fiber (core-sheath type) were mixed and carded. A machine having a basis weight of 200 g / m 2 was prepared using a machine. 70 g / m 2 of PP ultrafine fiber nonwoven fabric was laminated on it, and heat molding and bonding were carried out at an ambient temperature of 150 ° C. and a thickness of 5 mm.
【００２５】（比較例２）１６．７ｄｔｅｘのポリエス
テル繊維１００質量％をカード機を用いて目付２００ｇ
／ｍ2相当のウェブを作成し、ニードルパンチ法により
厚さ５ｍｍの不織布を作成した。その上に低融点接着剤
（融点１０５℃）を２０ｇ／ｍ2散布、更にＰＰ製極細
繊維不織布７０ｇ／ｍ2を積層し、雰囲気温度１５０℃
にて厚さ５ｍｍで、貼り合せを実施した。(Comparative Example 2) 100% by mass of 16.7 dtex polyester fiber was used and a basis weight of 200 g was obtained using a card machine.
/ M 2 to create the equivalent of the web to prepare a 5mm thick nonwoven by needle punching. 20 g / m 2 of low melting point adhesive (melting point 105 ° C.) was sprinkled on it, and further 70 g / m 2 of PP ultrafine fiber non-woven fabric was laminated, and the ambient temperature was 150 ° C.
The lamination was performed with a thickness of 5 mm.
【００２６】（比較例３）ＰＰ製極細繊維不織布７０ｇ
／ｍ2上に１６．７ｄｔｅｘのポリエステル繊維１００
質量％をカード機を用いて目付２００ｇ／ｍ2相当のウ
ェブを作成、積層し、ニードルパンチ法により貼り合せ
及び厚さ５ｍｍの不織布を作成した。(Comparative Example 3) 70 g of PP ultrafine fiber nonwoven fabric
16.7 dtex polyester fiber 100 / m 2
A web having a basis weight of 200 g / m 2 was prepared by using a card machine at a mass% and laminated, laminated by a needle punch method, and a non-woven fabric having a thickness of 5 mm was prepared.
【００２７】（評価方法）評価は、吸音率（垂直入射
法；ＪＩＳ−Ａ−１４０５）により実施した。測定範囲
は、５００〜６３００Ｈｚである（１／３オクター
ブ）。評価結果については、表１〜表３に示す通りであ
る。(Evaluation Method) The evaluation was performed by the sound absorption coefficient (normal incidence method; JIS-A-1405). The measurement range is 500 to 6300 Hz (1/3 octave). The evaluation results are as shown in Tables 1 to 3.
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【表２】 [Table 2]
【００３０】[0030]
【表３】 [Table 3]
【００３１】[0031]
【発明の効果】本発明によれば、優れた吸音性、特に１
０００〜４０００Ｈｚにおいて優れた吸音性を発現する
自動車用に好適な吸音材を提供することが出来る。According to the present invention, excellent sound absorption, especially 1
It is possible to provide a sound absorbing material suitable for automobiles that exhibits excellent sound absorbing properties at 000 to 4000 Hz.
フロントページの続き Ｆターム(参考） 3D023 BA03 BB01 BE05 4F100 AK07 AK41A AK42B AL09B BA02 DG15A DG15B DG18A EC03A GB32 JD02B JH01 YY00A YY00B 4L047 AA14 AA21 AA27 AB08 BA07 BA09 BA23 BB06 CA02 CA05 CA19 CB03 CC09 Continued front page F term (reference) 3D023 BA03 BB01 BE05 4F100 AK07 AK41A AK42B AL09B BA02 DG15A DG15B DG18A EC03A GB32 JD02B JH01 YY00A YY00B 4L047 AA14 AA21 AA27 AB08 BA07 BA09 BA23 BB06 CA02 CA05 CA19 CB03 CC09
Claims (3)
維を用いた、見掛けの厚さが１０〜３０ｍｍのポリエス
テル系繊維不織布の片面に、主に１．０ｄｔｅｘ以下の
繊維で構成され、目付が１０〜１００ｇ／ｍ2で、更に
ＪＩＳ Ｌ−１０９６に基づいて測定される通気度が５
〜５０ｃｃ／ｃｍ2／ｓｅｃであるメルトブロー極細繊
維不織布が積層され、周波数１０００〜４０００Ｈｚに
おける吸音性に優れることを特徴とする高性能吸音材。1. A polyester fiber non-woven fabric having an apparent thickness of 10 to 30 mm, which uses polyester fibers of 1.0 to 12 dtex, is mainly composed of fibers of 1.0 dtex or less and has a basis weight of 10. -100 g / m 2 , and the air permeability measured according to JIS L-1096 is 5
A high-performance sound-absorbing material, characterized in that a melt-blown ultrafine fiber nonwoven fabric of ˜50 cc / cm 2 / sec is laminated and has excellent sound absorption at a frequency of 1000-4000 Hz.
繊維及び高融点繊維より２０℃以上融点が低い低融点繊
維の混合不織布であり、更に低融点繊維の溶融により接
着されていることを特徴とする請求項１記載の高性能吸
音材。2. The non-woven fabric of polyester fiber is a mixed non-woven fabric of high melting point fiber and low melting point fiber having a melting point lower than that of high melting point fiber by 20 ° C. or more, and further bonded by melting of the low melting point fiber. The high performance sound absorbing material according to claim 1.
ブチレンテレフタレートまたはポリエステルエラストマ
ー系極細繊維不織布であることを特徴とする請求項１ま
たは２記載の高性能吸音材。3. The high performance sound absorbing material according to claim 1, wherein the melt blown ultrafine fiber nonwoven fabric is a polybutylene terephthalate or polyester elastomer based ultrafine fiber nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001232308A JP2003049351A (en) | 2001-07-31 | 2001-07-31 | High-performance acoustic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001232308A JP2003049351A (en) | 2001-07-31 | 2001-07-31 | High-performance acoustic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003049351A true JP2003049351A (en) | 2003-02-21 |
Family
ID=19064247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001232308A Withdrawn JP2003049351A (en) | 2001-07-31 | 2001-07-31 | High-performance acoustic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003049351A (en) |
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|---|---|---|---|---|
| JP2004354844A (en) * | 2003-05-30 | 2004-12-16 | Toray Ind Inc | Acoustic material constituent member and acoustic material |
| JP2005178316A (en) * | 2003-12-24 | 2005-07-07 | Toyota Boshoku Corp | Laminated nonwoven fabric and inner trim material of automobile |
| JP2008132972A (en) * | 2006-10-25 | 2008-06-12 | Toabo Material Co Ltd | Sound-insulating cushioning material |
| JP2009512578A (en) * | 2005-10-19 | 2009-03-26 | スリーエム イノベイティブ プロパティズ カンパニー | Multilayer article having acoustic absorption characteristics, and method for producing and using the same |
| JP2009275309A (en) * | 2008-05-14 | 2009-11-26 | Toyobo Co Ltd | Deodorant and sound-absorbing material |
| US7694779B2 (en) * | 2003-08-25 | 2010-04-13 | Takayasu Co., Ltd. | Sound absorbing material |
| CN103696136A (en) * | 2013-11-25 | 2014-04-02 | 芜湖跃飞新型吸音材料股份有限公司 | Anti-aging isotactic polypropylene noise-absorbing cotton and preparation method thereof |
| CN103696134A (en) * | 2013-11-26 | 2014-04-02 | 芜湖跃飞新型吸音材料股份有限公司 | Flame-retardant non-woven fabric sound-absorbing cotton and preparation method thereof |
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| CZ304656B6 (en) * | 2013-01-18 | 2014-08-20 | Technická univerzita v Liberci | Sound absorbing means containing at least one acoustic sounding board formed by a layer of polymer nanofibers |
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| US9570061B2 (en) | 2013-08-22 | 2017-02-14 | Autonetworks Technologies, Ltd. | Acoustic material and wire harness with acoustic material |
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| CN108866830A (en) * | 2018-08-24 | 2018-11-23 | 芜湖跃飞新型吸音材料股份有限公司 | A kind of two-component car bra acoustical cotton and preparation method thereof |
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2001
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|---|---|---|---|---|
| JP2004354844A (en) * | 2003-05-30 | 2004-12-16 | Toray Ind Inc | Acoustic material constituent member and acoustic material |
| US7694779B2 (en) * | 2003-08-25 | 2010-04-13 | Takayasu Co., Ltd. | Sound absorbing material |
| JP2005178316A (en) * | 2003-12-24 | 2005-07-07 | Toyota Boshoku Corp | Laminated nonwoven fabric and inner trim material of automobile |
| JP2009512578A (en) * | 2005-10-19 | 2009-03-26 | スリーエム イノベイティブ プロパティズ カンパニー | Multilayer article having acoustic absorption characteristics, and method for producing and using the same |
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| US10783868B2 (en) | 2007-08-31 | 2020-09-22 | 3M Innovative Properties Company | Acoustic air flow resistive article and method of making |
| US9767782B2 (en) | 2007-08-31 | 2017-09-19 | 3M Innovative Properties Company | Acoustic air flow resistive article and method of making |
| JP2009275309A (en) * | 2008-05-14 | 2009-11-26 | Toyobo Co Ltd | Deodorant and sound-absorbing material |
| CZ304657B6 (en) * | 2013-01-18 | 2014-08-20 | Technická univerzita v Liberci | Sound absorbing means containing at least one hollow-space resonator |
| CZ304656B6 (en) * | 2013-01-18 | 2014-08-20 | Technická univerzita v Liberci | Sound absorbing means containing at least one acoustic sounding board formed by a layer of polymer nanofibers |
| JP2015030218A (en) * | 2013-08-05 | 2015-02-16 | 東レ株式会社 | Nonwoven fabric excellent in absorbing property |
| US9570061B2 (en) | 2013-08-22 | 2017-02-14 | Autonetworks Technologies, Ltd. | Acoustic material and wire harness with acoustic material |
| CN103696136A (en) * | 2013-11-25 | 2014-04-02 | 芜湖跃飞新型吸音材料股份有限公司 | Anti-aging isotactic polypropylene noise-absorbing cotton and preparation method thereof |
| CN103696138A (en) * | 2013-11-26 | 2014-04-02 | 芜湖跃飞新型吸音材料股份有限公司 | Insulated non-woven fabric sound-absorbing cotton and preparation method thereof |
| CN103696134A (en) * | 2013-11-26 | 2014-04-02 | 芜湖跃飞新型吸音材料股份有限公司 | Flame-retardant non-woven fabric sound-absorbing cotton and preparation method thereof |
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| CN110126702A (en) * | 2019-05-29 | 2019-08-16 | 无锡吉兴汽车声学部件科技有限公司 | A kind of vibration damping blanket |
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