JP2002161464A - Lightweight sound-absorbing material - Google Patents
Lightweight sound-absorbing materialInfo
- Publication number
- JP2002161464A JP2002161464A JP2000359692A JP2000359692A JP2002161464A JP 2002161464 A JP2002161464 A JP 2002161464A JP 2000359692 A JP2000359692 A JP 2000359692A JP 2000359692 A JP2000359692 A JP 2000359692A JP 2002161464 A JP2002161464 A JP 2002161464A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- fiber
- absorbing material
- fiber diameter
- short
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- 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、軽量で厚みが薄い
にも関わらず吸音性および制振特性にすぐれた吸音材に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing material having excellent sound absorbing properties and vibration damping characteristics despite its light weight and small thickness.
【０００２】[0002]
【従来の技術】自動車や建築用途などの吸音材として短
繊維不織布が広く用いられている。吸音性能を高くする
ために、繊維径を細くして空気の通過抵抗を大きくした
り、目付を大きくするなどの方法が採られてきた。その
結果、高い吸音性能を求められる場合には、繊維径が１
５ミクロン程度と比較的細い繊維を用い、目付が５００
〜５０００ｇ／ｃｍ2の厚くて重い短繊維不織布が用い
られている。極細繊維を含む不織布はすぐれた吸音特性
やフィルター性、遮蔽性などのすぐれた特性があり多く
の用途に利用されてきたが、強度が弱かったり、形態安
定性が悪いなどの問題があり、その改善のために別の不
織布と積層複合化して用いられてきた。この際に不織布
を積層一体化する方法として、スプレーや転写などでバ
インダーとなる樹脂あるいは熱融着繊維などを用いてい
た。しかしながら、これらの方法では、乾燥あるいは樹
脂の融解接着の目的で熱処理を行うことが必要であり、
排気ガスによる環境汚染の問題や省エネルギーの観点か
らあまり好ましい物でなかった。また、バインダー樹脂
が不織布間の界面で皮膜を形成し、吸音性が低下するな
どの問題もあった。一方、極細繊維不織布と長繊維不織
布を積層一体化する方法は、スパンボンド不織布の間に
極細繊維であるメルトブローン不織布を積層して熱エン
ボス法で接合する方法（通称Ｓ／Ｍ／Ｓなどの名前で呼
ばれる）が知られている。しかしながら、これらの不織
布は、ボリューム感に欠け、硬い風合いとなってしまう
ので用途が制限されてしまうという問題点がある。ま
た、コフォームと呼ばれる、メルトブローン不織布の内
部に２０〜３０ミクロン前後の短繊維を吹き込んで複合
化した不織布も商品化されているが、形態安定性や成形
加工性が悪い点が問題である。2. Description of the Related Art Short-fiber nonwoven fabrics are widely used as sound-absorbing materials for automobiles and construction purposes. In order to enhance the sound absorption performance, methods such as reducing the fiber diameter to increase the air passage resistance and increasing the basis weight have been adopted. As a result, when high sound absorption performance is required, the fiber diameter is 1
Uses relatively thin fiber of about 5 microns, and has a basis weight of 500
A thick and heavy short-fiber nonwoven fabric of 5000 g / cm 2 is used. Non-woven fabrics containing ultrafine fibers have been used for many applications due to their excellent sound absorbing properties, excellent filter properties, and excellent shielding properties.However, they have problems such as low strength and poor form stability. It has been used as a laminate with another nonwoven fabric for improvement. At this time, as a method of laminating and integrating the nonwoven fabric, a resin or a heat-fused fiber serving as a binder by spraying or transferring has been used. However, in these methods, it is necessary to perform a heat treatment for the purpose of drying or fusion bonding of the resin,
It was not very desirable from the viewpoint of environmental pollution due to exhaust gas and energy saving. In addition, there is also a problem that the binder resin forms a film at the interface between the nonwoven fabrics and the sound absorbing property is reduced. On the other hand, a method of laminating and integrating a microfiber nonwoven fabric and a long-fiber nonwoven fabric is a method of laminating a meltblown nonwoven fabric as a microfiber between spunbonded nonwoven fabrics and joining them by a hot embossing method (commonly known as S / M / S). Is known). However, these non-woven fabrics have a problem that they lack a voluminous feel and have a hard texture, which limits their use. A nonwoven fabric called a coform, which is formed by blowing short fibers of about 20 to 30 microns into a meltblown nonwoven fabric and compounded, has also been commercialized, but it has problems in that form stability and molding workability are poor.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、吸音性能が
高く、薄くて軽量で形態安定性の良い吸音材を、安価に
提供することを目的とする。特に、自動車関連では、燃
費向上や快適性改善のため、軽量で優れた吸音材が要求
されており、その要望に応える事も目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a thin, lightweight, and stable form-absorbing material having high sound absorbing performance at a low cost. In particular, in the field of automobiles, a lightweight and excellent sound absorbing material is demanded in order to improve fuel efficiency and comfort, and the purpose is to meet the demand.
【０００４】[0004]
【課題を解決するための手段】本発明は、かかる問題を
解決するために以下の手段をとる。第一の発明は、繊維
径が６ミクロン以下の極細繊維を含み目付が２０〜１０
０ｇ／ｍ2のメルトブローン不織布と、繊維径が７〜４
０ミクロンで目付が５０〜２０００ｇ／ｍ2、厚みが５
〜３０ｍｍの基布入り短繊維不織布とが積層一体化され
てなることを特徴とする軽量吸音材である。The present invention employs the following means to solve such a problem. The first invention includes an ultrafine fiber having a fiber diameter of 6 microns or less and a basis weight of 20 to 10
0 g / m 2 melt blown nonwoven fabric and fiber diameter of 7-4
0 micron with a basis weight of 50 to 2000 g / m 2 and a thickness of 5
It is a lightweight sound absorbing material characterized by being laminated and integrated with a short fiber nonwoven fabric containing a base fabric of about 30 mm.
【０００５】第二の発明は、第一の発明において、短繊
維不織布が繊維長が５０〜１５０ｍｍの短繊維よりなる
不織布であって、ニードルパンチ法により積層一体化さ
れたことを特徴とする軽量吸音材である。According to a second aspect of the present invention, in the first aspect, the short-fiber nonwoven fabric is a nonwoven fabric made of short fibers having a fiber length of 50 to 150 mm, and is laminated and integrated by a needle punch method. It is a sound absorbing material.
【０００６】第三の発明は、第一の発明あるいは第二の
発明に記載の吸音材において、基布が１５〜５０ｇ／ｍ
2のポリエステルスパンボンド不織布であることを特徴
とする軽量吸音材である。A third invention is a sound absorbing material according to the first invention or the second invention, wherein the base cloth is 15 to 50 g / m2.
2 is a lightweight sound absorbing material characterized by being a polyester spunbond nonwoven fabric.
【０００７】第四の発明は、短繊維不織布が５〜２０ミ
クロンの短繊維を重量分率で１０〜４０％と２０〜３０
ミクロンの短繊維を重量分率で６０〜９０％含有するこ
とを特徴とする第一の発明〜第三の発明のいずれかに記
載の軽量吸音材である。In a fourth aspect of the present invention, the short fiber nonwoven fabric contains short fibers of 5 to 20 microns in weight fraction of 10 to 40% and 20 to 30%.
The lightweight sound-absorbing material according to any one of the first to third inventions, wherein the light-weight sound absorbing material contains 60 to 90% by weight of a micron short fiber.
【０００８】[0008]
【発明の実施の形態】以下に本発明を詳細に説明する。
本発明に用いられる不織布は、少なくとも２種以上の不
織布が接合一体化されていることが必要である。通気性
などをコントロールするために極細繊維を含む不織布層
にフィルムや強度の高いスパンボンド不織布などを積層
する事も望ましい形態のひとつである。また、織布や織
物と複合化するのも使用形態により好ましい。さらに、
該複合不織布の外側に色や模様のついた意匠性のある表
層不織布を貼り付けても良く、車両内装材や建築材の防
音材として好適に用いることが可能である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The nonwoven fabric used in the present invention requires that at least two or more nonwoven fabrics are joined and integrated. Laminating a film, a high-strength spunbonded nonwoven fabric, or the like on a nonwoven fabric layer containing microfibers in order to control air permeability and the like is also one of the desirable modes. It is also preferable to form a composite with a woven fabric or a woven fabric depending on the use form. further,
A surface nonwoven fabric having a color and a design may be attached to the outside of the composite nonwoven fabric, and the composite nonwoven fabric can be suitably used as a soundproofing material for vehicle interior materials and building materials.
【０００９】本発明で用いられる繊維径が６ミクロン以
下の極細繊維を含み目付が２０〜１００ｇ／ｍ2のメル
トブローン不織布は、極細繊維を重量で１０％以上含有
されていることが好ましい。不織布全体が極細繊維のみ
で構成されていてもよいが、含有率が小さすぎると極細
繊維特性による効果が得られにくく好ましくない。極細
繊維の繊維径は５ミクロン以下が好ましく、特に好まし
くは、０．５〜４ミクロン以下であり、最も好ましくは
１．５〜３ミクロン前後である。メルトブロー法は、繊
維のランダム配列が可能で生産コストの安いため極細繊
維の製造に好適に利用される。The melt blown nonwoven fabric used in the present invention and having a basis weight of 20 to 100 g / m 2 containing ultrafine fibers having a fiber diameter of 6 μm or less preferably contains at least 10% by weight of the ultrafine fibers. The entire nonwoven fabric may be composed of only ultrafine fibers. However, if the content is too small, it is difficult to obtain the effect due to the characteristics of ultrafine fibers, which is not preferable. The fiber diameter of the ultrafine fibers is preferably 5 microns or less, particularly preferably 0.5 to 4 microns, and most preferably about 1.5 to 3 microns. The melt blow method is suitable for the production of ultrafine fibers because the fibers can be randomly arranged and the production cost is low.
【００１０】メルトブローン不織布は強度が弱いので、
スパンボンド不織布など補強用不織布と接合した不織布
を用いたり、積層工程で同時に３層以上の不織布を積層
するのも好ましい。この際、耐摩耗性にすぐれたスパン
ボンド不織布が使用時に表層側にくるように設置するこ
とが好ましい。メルトブロー不織布とスパンボンド不織
布のエンボス加工積層不織布はＳ／Ｍ／ＳやＳ／Ｍなど
の名称で呼ばれ市販されておりこれらを用いるのも好ま
しい（Ｓはスパンボンド不織布を、Ｍはメルトブロー不
織布を表す）。[0010] Since the melt blown nonwoven fabric has low strength,
It is also preferable to use a nonwoven fabric bonded to a reinforcing nonwoven fabric, such as a spunbonded nonwoven fabric, or to laminate three or more nonwoven fabrics simultaneously in the laminating step. At this time, it is preferable that the spunbonded nonwoven fabric having excellent abrasion resistance is placed on the surface layer side when used. The embossed laminated nonwoven fabric of the melt-blown nonwoven fabric and the spunbonded nonwoven fabric is called S / M / S or S / M and is commercially available. It is also preferable to use these (S is a spunbond nonwoven fabric, M is a meltblown nonwoven fabric). Represent).
【００１１】極細繊維を含む不織布は、目付は２０〜１
００ｇ／ｍ2とする。目付が２０ｇ／ｍ2より小さくなる
と、極細繊維の持つ吸音効果があまり期待できない。一
方、目付が１００ｇ／ｍ2を超えると、短繊維不織布と
の複合化する際に皺が入ったり、接合力が弱いという問
題が生じる場合がありあまり好ましくない。また、目付
をあまり大きくしすぎても目的とする吸音性などの改善
効果があまり変わらず、コスト削減や軽量化などの観点
からあまり好ましくない。The nonwoven fabric containing ultrafine fibers has a basis weight of 20 to 1
00 g / m 2 . If the basis weight is less than 20 g / m 2, the sound absorbing effect of the ultrafine fibers cannot be expected much. On the other hand, if the basis weight is more than 100 g / m 2 , wrinkles may occur during the compounding with the short-fiber nonwoven fabric, or a problem that the bonding strength is weak may occur. In addition, if the basis weight is too large, the intended effect of improving sound absorption and the like does not change so much, which is not preferable from the viewpoint of cost reduction and weight reduction.
【００１２】極細繊維を含む不織布を構成する素材は、
特に限定はされないが、ポリプロピレンかポリブチレン
テレフタレートが好ましい。好ましくは、極細繊維に積
層される短繊維不織布と類似の素材であることがリサイ
クルしやすく特に好ましい。一方、複数の素材よりなる
繊維が混合されていても問題はない。素材がエラストマ
ーの場合は、成形加工がしやすく、またニードルパンチ
積層加工を行う際には、突き刺し密度を高くとってもあ
まり性能低下がなく、突き刺し密度を高くすることで積
層体の界面の剥離強度を高くすることが可能となり形態
安定性を高くすることが可能ある。The material constituting the non-woven fabric containing the ultrafine fibers is as follows:
Although not particularly limited, polypropylene or polybutylene terephthalate is preferred. Preferably, the material is similar to the short-fiber nonwoven fabric laminated on the ultrafine fibers, and it is particularly preferable because it is easy to recycle. On the other hand, there is no problem even if fibers made of a plurality of materials are mixed. If the material is an elastomer, it is easy to mold, and when performing needle punch lamination, there is no significant decrease in performance even if the piercing density is high, and by increasing the piercing density, the peel strength at the interface of the laminate is increased. The height can be increased, and the form stability can be increased.
【００１３】次に、極細繊維を含む不織布に積層される
短繊維不織布は、繊維径が７〜４０ミクロンであり、好
ましくは７〜２０ミクロンである。繊維径が７ミクロン
より細いことは直接大きな問題を引き起こす訳ではない
が、カード機からの紡出性などの生産性を考えるとあま
り好ましくない。また、繊維径が７ミクロンより大幅に
小さいと、本発明による積層効果が小さくなる。また、
不織布が毛羽立ちやすいなど別の問題を生じる場合があ
る。一方、繊維径が４０ミクロンより太いと、吸音性能
に対する寄与が小さくなりあまり好ましくない。Next, the short fiber non-woven fabric laminated on the non-woven fabric containing the ultrafine fibers has a fiber diameter of 7 to 40 microns, preferably 7 to 20 microns. Although the fiber diameter of less than 7 microns does not directly cause a serious problem, it is not very preferable in view of productivity such as spinnability from a card machine. If the fiber diameter is much smaller than 7 microns, the laminating effect according to the present invention will be reduced. Also,
Another problem may occur such as the nonwoven fabric being easily fluffed. On the other hand, if the fiber diameter is larger than 40 microns, the contribution to the sound absorbing performance is reduced, which is not preferable.
【００１４】本発明において、短繊維の不織布を極細繊
維を含む不織布と積層するのは、極細繊維を含む不織布
がへたり易く形態安定性が低い、毛羽立ち易い、嵩高性
の維持に問題を生じやすいなどの問題点を改善するため
及び高いクッション性、制振性を得るなどの目的で実施
される。また、吸音材は一般的に厚みが大きいほど高い
性能を得ることが可能と考えられ、厚みをコントロール
する目的でも積層を行う。吸音性能向上に貢献する細い
繊維と形態安定性改善に貢献する太い繊維を適当な割合
で混合使用することで吸音性能が高く、かつ形態安定性
のよい吸音材を設計することが可能である。好ましく
は、繊維径５〜２０ミクロンの短繊維が重量分率で１０
〜４０％と繊維径２０〜３０ミクロンの短繊維が重量分
率で６０〜９０％混合使用することで、嵩高性と適切な
通気抵抗を得ることが可能である。In the present invention, the nonwoven fabric containing short fibers is laminated with the nonwoven fabric containing ultrafine fibers because the nonwoven fabric containing ultrafine fibers is easily degraded, has low shape stability, is easily fluffed, and tends to cause problems in maintaining bulkiness. It is carried out for the purpose of improving problems such as the above and obtaining high cushioning property and vibration damping property. In general, it is considered that the larger the thickness of the sound absorbing material, the higher the performance can be obtained, and the sound absorbing material is also laminated for the purpose of controlling the thickness. It is possible to design a sound-absorbing material having high sound-absorbing performance and good form stability by mixing and using an appropriate ratio of thin fibers contributing to improvement of sound absorbing performance and thick fibers contributing to improvement of form stability. Preferably, short fibers having a fiber diameter of 5 to 20 microns are 10% by weight.
By mixing and using 60 to 90% by weight of short fibers having a fiber diameter of 20 to 30 microns and a fiber diameter of 20 to 30 microns, it is possible to obtain bulkiness and appropriate airflow resistance.
【００１５】本発明における短繊維不織布の目付は、５
０〜２０００ｇ／ｍ2であり、好ましくは１００〜２０
００ｇ／ｍ2である。目付が５０ｇ／ｍ2より小さいと積
層効果が小さく不織布の嵩高性や柔らかい風合いの点で
あまり好ましくない。一方、２０００ｇ／ｍ2より大き
い目付であると厚みが大きくなりすぎてスペースをとっ
たり、重さが重くなるため好ましくない。In the present invention, the basis weight of the short-fiber nonwoven fabric is 5
0 to 2000 g / m 2 , preferably 100 to 20 g / m 2.
00 g / m 2 . If the basis weight is less than 50 g / m 2 , the laminating effect is small and the nonwoven fabric is not preferred in terms of bulkiness and soft texture. On the other hand, if the basis weight is more than 2000 g / m 2 , the thickness becomes too large to take up space and the weight becomes heavy, which is not preferable.
【００１６】短繊維の繊維長さは３８〜１５０ｍｍが好
ましく、特に好ましくは５０〜１５０ｍｍである。本発
明者らの検討の範囲では、繊維長が長いほど優れた吸音
率を示した。ただし、繊維長が長すぎるとカードからの
紡出性が悪くなり好ましくなかった。短繊維は単一成分
でも良いが、２種類以上の混合物や複数成分の複合繊維
でも良い。融点の異なる熱融着性繊維を１０〜５０重量
％混合して用いることも寸法安定性や成形性を改善する
観点から好ましい。The fiber length of the short fibers is preferably from 38 to 150 mm, particularly preferably from 50 to 150 mm. Within the scope of the study by the present inventors, the longer the fiber length, the better the sound absorption coefficient was shown. However, if the fiber length is too long, the spinning property from the card deteriorates, which is not preferable. The short fiber may be a single component, or may be a mixture of two or more types or a multicomponent fiber. It is also preferable to use a mixture of 10 to 50% by weight of heat-fusible fibers having different melting points from the viewpoint of improving dimensional stability and moldability.
【００１７】短繊維不織布の厚みは吸音性能と深く関係
するが、本発明の構成では、５〜３０ｍｍであることが
好ましい。厚みが大きすぎると形態安定性が悪くなりあ
まり好ましくない。厚みが小さすぎると吸音性は悪くな
る方向にあり本発明の目的を満足することが難しくな
る。Although the thickness of the short fiber nonwoven fabric is deeply related to the sound absorbing performance, it is preferably 5 to 30 mm in the structure of the present invention. If the thickness is too large, the morphological stability deteriorates, which is not preferable. If the thickness is too small, the sound absorption tends to deteriorate, and it is difficult to satisfy the object of the present invention.
【００１８】本発明の短繊維不織布は基布が挿入されて
いることが必要である。前述の通り、厚みの大きい不織
布は、吸音性能を高くすることが可能となるが形態安定
性が低下しやすい。そこで、目付が１５〜１００ｇ／ｍ
2の目付の基布を導入することで形態安定性が改善され
る。基布の素材や構成は特に限定されないが、強力の高
い織布やスパンボンド不織布が好ましい。特に、経済性
の観点から目付が１５〜５０ｇ／ｍ2のスパンボンド不
織布を用いることが好ましい。基布の挿入位置は特に限
定されないが、不織布の中央付近に挿入されるのが一般
的である。基布と短繊維不織布は、接着剤、接着性繊
維、ニードルパンチ法などの方法により一体化されるの
が普通である。The short-fiber nonwoven fabric of the present invention requires that a base fabric be inserted. As described above, a nonwoven fabric having a large thickness can enhance the sound absorbing performance, but is liable to deteriorate in form stability. Therefore, the basis weight is 15-100 g / m
Form stability is improved by introducing a base fabric having a basis weight of 2 . The material and configuration of the base fabric are not particularly limited, but a high-strength woven fabric or a spunbonded nonwoven fabric is preferable. In particular, it is preferable to use a spunbond nonwoven fabric having a basis weight of 15 to 50 g / m 2 from the viewpoint of economy. Although the insertion position of the base fabric is not particularly limited, it is generally inserted near the center of the nonwoven fabric. The base fabric and the short-fiber nonwoven fabric are generally integrated by a method such as an adhesive, an adhesive fiber, and a needle punch method.
【００１９】不織布の積層一体化方法はニードルパンチ
法により一体化する事とが好ましい。ニードルパンチ法
は不織布加工方法として一般的に実施されており、詳細
は日本繊維機械学会不織布研究会編集の「不織布の基礎
と応用」などで詳細に解説されている。このニードルパ
ンチ法を用いて不織布を複合化することは公知である
が、極細繊維で目が均一化された不織布と繊維径が比較
的太い嵩高の短繊維をニードルパンチ機で複合化すると
極細繊維不織布に穴が開いて、吸音性能やフィルター性
能などが低下して極細繊維特性が得にくいと考えられて
いたためか、発明者の知る限りでは、市場にその商品を
見つけることができない。The method for laminating and integrating the nonwoven fabrics is preferably to integrate them by a needle punch method. The needle punching method is generally performed as a nonwoven fabric processing method, and the details are described in detail in “Foundations and Applications of Nonwoven Fabrics” edited by the Japan Textile Machine Society Nonwovens Research Group. It is known that a nonwoven fabric is compounded using this needle punching method. However, when a nonwoven fabric whose eyes are made uniform with ultrafine fibers and a bulky short fiber having a relatively large fiber diameter are compounded with a needle punching machine, an ultrafine fiber is formed. Perhaps because it was thought that a hole was formed in the nonwoven fabric and the sound absorbing performance and filter performance were lowered and it was difficult to obtain the properties of ultrafine fibers, the product could not be found on the market as far as the inventor knew.
【００２０】ニードルパンチ加工を行う際には、３８番
手より細いニードル（針）を用いることが好ましく、特
に好ましくは４０〜４２番手である。ニードルは、短繊
維不織布側から入り、極細繊維を含む不織布の外側に短
繊維のループを生じさせることが好ましい。極細繊維を
含む不織布は、繊維が他の物に引っかかったり、それに
より切断されたりして毛羽立ちやすいが、短繊維のルー
プが極細繊維を含む不織布の表面毛羽立ちを防止した
り、クッション層になって、極細繊維不織布層にかかる
外力を緩和することで破壊の防止に役立つことが判明し
た。When performing the needle punching process, it is preferable to use a needle (needle) thinner than 38 count, particularly preferably 40 to 42 count. It is preferable that the needle enters from the short fiber nonwoven fabric side and causes a short fiber loop to be generated outside the nonwoven fabric containing the ultrafine fibers. Non-woven fabrics containing microfibers tend to fuzz when the fibers are caught by other objects or are cut by them, but loops of short fibers prevent surface fuzzing of non-woven fabrics containing microfibers or become a cushion layer. It has been found that relaxing the external force applied to the microfiber nonwoven fabric layer helps prevent breakage.
【００２１】また、伸度が２５％より高い別の不織布や
フィルムなどと積層する際に、該ループと積層相手の第
３の素材を接着することで、曲げや引っ張りなどの外力
がかかったときに極細繊維を含む不織布の破壊されるの
を防止することが可能となることも判明した。適切なル
ープの大きさを形成するために、ニードルパンチの針深
度は１５ｍｍ以下であることが好ましい。それ以上で
は、極細繊維不織布を針および短繊維が貫通するときの
衝撃で不織布が破れたり、貫通した後の針穴が大きくな
りすぎることが多くなりあまり好ましくない。Further, when laminating with another nonwoven fabric or film having an elongation of more than 25%, the loop is bonded to a third material to be laminated so that an external force such as bending or pulling is applied. It has also been found that it is possible to prevent the nonwoven fabric containing ultrafine fibers from being broken. In order to form an appropriate loop size, the needle depth of the needle punch is preferably 15 mm or less. Above this, the nonwoven fabric breaks due to the impact of the needles and short fibers penetrating the ultrafine fiber nonwoven fabric, and the needle hole after penetrating is often too large, which is not preferred.
【００２２】針深度は、ニードルのバーブの位置にもよ
るが５ｍｍ以上であることが、不織布の交絡を増やして
剥離を防止する上で好ましい。刺孔密度は３０〜２００
本／ｃｍ2であることが好ましい。刺孔密度が３０本／
ｃｍ2より小さいと不織布の剥離の問題が生じやすく、
２５０本／ｃｍ2より大きいと刺孔による開口総面積が
大きすぎたり、極細繊維を含む不織布の破れや破壊を生
じやすくあまり好ましくない。The needle depth depends on the position of the barb of the needle, but is preferably at least 5 mm in order to increase entanglement of the nonwoven fabric and prevent peeling. Puncture density is 30-200
Book / cm 2 is preferable. Piercing density 30 /
If it is smaller than 2 cm, the problem of peeling of the nonwoven fabric tends to occur,
If it is more than 250 fibers / cm 2, the total area of the openings due to the punctures is too large, and the nonwoven fabric containing the ultrafine fibers tends to be broken or broken, which is not preferable.
【００２３】吸音材表面の毛羽防止や形態安全性改善な
どの目的に、前記の第一から第四の発明のいずれかに記
載の吸音材に積層する相手として特に好適であるのは、
繊維径が５〜２０ミクロンで目付が２０〜２５０ｇ／ｍ
2の長繊維不織布である。該長繊維不織布の繊維径が５
ミクロン未満であると形態安定性などの改善効果が小さ
く好ましくない。２０ミクロンを超えると不織布の斑が
目立ちあまり好ましくない。目付に関しては、２０ｇ／
ｍ2未満では地合の斑が目立ち好ましくなく、ニードル
パンチで積層しても繊維の絡み点が少ないために簡単に
剥離してしまうという問題を生じる。一方、目付が２５
０ｇ／ｍ2を超えると軽量化を目的とした本発明の趣旨
と合致せず好ましくない。For the purpose of preventing fuzz on the surface of the sound-absorbing material and improving form safety, it is particularly suitable as a mating member to be laminated on the sound-absorbing material according to any one of the first to fourth inventions.
Fiber diameter is 5-20 microns and basis weight is 20-250 g / m
2 long-fiber non-woven fabric. The fiber diameter of the long-fiber nonwoven fabric is 5
If it is less than micron, the effect of improving morphological stability and the like is undesirably small. If it exceeds 20 microns, unevenness of the nonwoven fabric is conspicuous and not very preferable. As for the basis weight, 20 g /
When it is less than m 2 , unevenness of formation is not conspicuous, which is not preferable, and there is a problem that even if lamination is performed by a needle punch, there is little entanglement of the fibers, so that the fibers are easily peeled off. Meanwhile, the basis weight is 25
If it exceeds 0 g / m 2 , it is not preferable because it does not conform to the purpose of the present invention for the purpose of weight reduction.
【００２４】積層される不織布の表面には、色付けをし
たり模様をプリントして意匠性を持たせることが好まし
い。これにより、建築構造物の吸音材や自動車内装材に
用いられる吸音材として視覚的に周囲と違和感なく調和
させることが可能となる。繊維の素材としては、伸度が
２５％以上あれば特に限定されないが、熱可塑性エラス
トマーや複屈折率が０．０８より小さいポリエステル系
繊維が得に好ましい。It is preferable that the surface of the nonwoven fabric to be laminated is colored or printed with a pattern to give it a design. This makes it possible to visually harmonize with the surroundings as a sound-absorbing material for a building structure or an automobile interior material. The material of the fiber is not particularly limited as long as the elongation is 25% or more, but a thermoplastic elastomer or a polyester fiber having a birefringence of less than 0.08 is particularly preferable.
【００２５】[0025]
【実施例】以下に、本発明を実施例によって説明する
が、本発明は何らこれらに限定されるものではない。な
お、実施例における測定及び評価法は以下の方法によっ
た。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples. The measurement and evaluation methods in the examples were based on the following methods.
【００２６】（平均繊維径）：走査型電子顕微鏡写真
で、繊維側面を２０本以上測定して、その平均値から計
測した。極細繊維不織布がメルトブロー法の場合は、繊
維径のバラツキが大きいため１００本以上を測定して平
均値を採用した。(Average fiber diameter): A scanning electron micrograph was used to measure 20 or more fiber side faces, and the average value was measured. In the case where the ultrafine fiber nonwoven fabric is a melt blow method, the dispersion of the fiber diameter is large, so that 100 or more fibers were measured and the average value was adopted.
【００２７】（目付および充填密度）：不織布を２０ｃ
ｍ角に切り出してその重量を測定した値を１ｍ2あたり
に換算して目付とした。充填密度は、不織布の目付を２
０ｇ／ｃｍ2の荷重下での厚みで割った値を求めて、ｇ
／ｃｍ3に単位換算して求めた。(Fabric weight and packing density): Non-woven fabric 20c
It was cut out into m-squares and the measured weight was converted to about 1 m 2 to obtain the basis weight. Packing density is 2
A value obtained by dividing the thickness under a load of 0 g / cm 2 by g
/ Cm 3 as a unit.
【００２８】（耐剥離性）：複合した不織布を手で９０
度前後折り曲げる動作を２０回繰り返して、剥離が生じ
るかどうかを目視で評価した。(Peeling resistance): The composite non-woven fabric is manually 90
The operation of bending back and forth was repeated 20 times, and whether or not peeling occurred was visually evaluated.
【００２９】（吸音率）：ＪＩＳ Ａ−１４０５に従っ
て、垂直入射法吸音率％を求めた。代表値として１００
０Ｈｚと２０００Ｈｚの値の平均値を用いた。(Sound absorption coefficient): The sound absorption coefficient% by the normal incidence method was determined according to JIS A-1405. 100 as representative value
The average value of the values at 0 Hz and 2000 Hz was used.
【００３０】[0030]
【実施例１】平均繊維径３ミクロン、目付１００ｇ／ｍ
2のポリブチレンテレフタレート製メルトブローン不織
布Ａの上に、平均繊維径１４ミクロン、繊維長５１ｍ
ｍ、捲縮数12個／インチの短繊維３０重量パーセントと
平均繊維径２５ミクロン、繊維長５１ｍｍ、捲縮数12個
／インチの嵩高短繊維７０重量パーセントを混合して作
られた目付１２５ｇ／ｍ2、充填密度０．０６ｇ／ｃｍ3
のポリエチレンテレフタレート製ニードルパンチ不織布
２枚の間に平均繊維径３ミクロン、目付１５ｇ／ｍ 2を
挟んでニードルパンチ法により一体化された３層構造の
不織布Ｂを重ねて、４０番手のニードルを用いて刺孔密
度５０本／ｃｍ2、針深度１０ｍｍでニードルパンチ積
層加工を実施した。吸音材を２０回程度折り曲げても剥
離の問題は生じず、吸音率も７２％と高く良好であっ
た。Example 1 Average fiber diameter: 3 microns, basis weight: 100 g / m
TwoPolybutylene terephthalate non-woven meltblown
On cloth A, average fiber diameter 14 microns, fiber length 51 m
m, 30 weight percent staple fiber with 12 crimps / inch
Average fiber diameter 25 microns, fiber length 51 mm, number of crimps 12
/ Inch bulky staple fiber 70% by weight
125g / mTwo, Packing density 0.06 g / cmThree
Needle-punched nonwoven fabric made of polyethylene terephthalate
Average fiber diameter 3 micron between 2 sheets, 15g / m TwoTo
Three-layer structure integrated by the needle punch method
Lay the non-woven fabric B and use a 40th needle to puncture
Degree 50 / cmTwoNeedle punch product at needle depth of 10mm
Layer processing was performed. Peel off even if the sound absorbing material is bent about 20 times
There was no separation problem, and the sound absorption coefficient was as high as 72%.
Was.
【００３１】[0031]
【実施例２】実施例１において、メルトブローン不織布
層側に平均繊維径１４ミクロン、目付３０ｇ／ｍ2の東
洋紡績社製難燃ポリエステルスパンボンド不織布（ハイ
ム）をニードルパンチ法の積層時に一緒に積層した。作
成した不織布を２０回程度折り曲げても剥離の問題は生
じず、吸音率も７５％と高く良好であった。表面を指で
こすっても全く毛羽立たず形態安定性に非常に優れてい
た。トムソン刃により打ち抜き加工を実施したところ複
雑な形状でもきれいに打ち抜くことができた。Example 2 In Example 1, a flame-retardant polyester spunbonded nonwoven fabric (Heim) manufactured by Toyobo Co., Ltd. having an average fiber diameter of 14 μm and a basis weight of 30 g / m 2 was laminated on the melt blown nonwoven fabric layer side at the time of lamination by the needle punch method. did. Even if the produced nonwoven fabric was bent about 20 times, no problem of peeling occurred, and the sound absorption was as high as 75%, which was good. Even when the surface was rubbed with a finger, it did not fluff at all and was extremely excellent in form stability. When punching was performed with a Thomson blade, it was possible to punch even complex shapes neatly.
【００３２】[0032]
【比較例１】平均繊維径１４ミクロン、繊維長５１ｍ
ｍ、捲縮数12個／インチの短繊維を用いて、目付５００
ｇ／ｍ2、厚み１０ｍｍの不織布を作成した。吸音率を
測定したところ３６％と低く問題であった。また、トム
ソン刃により打ち抜き加工を実施したところ不織布が歪
んできれいに打ち抜くことができず問題であった。Comparative Example 1 Average fiber diameter: 14 microns, fiber length: 51 m
m, a short fiber of 12 crimps / inch and a basis weight of 500
g / m 2, it was created thickness 10mm nonwoven. When the sound absorption coefficient was measured, it was 36%, which was a problem. In addition, when punching was performed with a Thomson blade, the nonwoven fabric was distorted and could not be punched cleanly, which was a problem.
【００３３】[0033]
【発明の効果】本発明の吸音材は、吸音性能が高く、薄
くて軽量で、成形加工性が良く、かつ形態安定性にすぐ
れるため、産業上の広い用途で吸音材として好適に使用
される。The sound-absorbing material of the present invention has a high sound-absorbing performance, is thin and lightweight, has good moldability and is excellent in form stability, and is therefore suitably used as a sound-absorbing material in a wide range of industrial applications. You.
Claims (4)
目付が２０〜１００ｇ／ｍ2のメルトブローン不織布
と、繊維径が７〜４０ミクロンで目付が５０〜２０００
ｇ／ｍ2、厚みが５〜３０ｍｍの基布入り短繊維不織布
とが積層一体化されてなることを特徴とする軽量吸音
材。1. A melt-blown non-woven fabric containing ultra-fine fibers having a fiber diameter of 6 μm or less and having a basis weight of 20 to 100 g / m 2 , a fiber diameter of 7 to 40 μm and a basis weight of 50 to 2000
g / m 2, light-weight sound absorbing material, characterized in that the thickness and the base fabric containing staple fiber nonwoven 5~30mm are laminated integrally.
３８〜１５０ｍｍの短繊維よりなる不織布であって、ニ
ードルパンチ法により積層一体化されていることを特徴
とする軽量吸音材。2. The lightweight sound-absorbing material according to claim 1, wherein the short-fiber nonwoven fabric is a nonwoven fabric made of short fibers having a fiber length of 38 to 150 mm, and is laminated and integrated by a needle punch method.
おいて、基布が目付１５〜５０ｇ／ｍ2のポリエステル
スパンボンド不織布であることを特徴とする軽量吸音
材。3. The lightweight sound absorbing material according to claim 1, wherein the base fabric is a polyester spunbonded nonwoven fabric having a basis weight of 15 to 50 g / m 2 .
短繊維を重量分率で１０〜４０％、繊維径２０〜３０ミ
クロンの短繊維を重量分率で６０〜９０％含有すること
を特徴とする請求項１〜３のいずれかに記載の軽量吸音
材。4. The short-fiber nonwoven fabric contains 10 to 40% by weight of short fibers having a fiber diameter of 5 to 20 microns and 60 to 90% by weight of short fibers having a fiber diameter of 20 to 30 microns. The lightweight sound absorbing material according to any one of claims 1 to 3, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000359692A JP3705419B2 (en) | 2000-11-27 | 2000-11-27 | Lightweight sound absorbing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000359692A JP3705419B2 (en) | 2000-11-27 | 2000-11-27 | Lightweight sound absorbing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002161464A true JP2002161464A (en) | 2002-06-04 |
| JP3705419B2 JP3705419B2 (en) | 2005-10-12 |
Family
ID=18831423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000359692A Expired - Fee Related JP3705419B2 (en) | 2000-11-27 | 2000-11-27 | Lightweight sound absorbing material |
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| Country | Link |
|---|---|
| JP (1) | JP3705419B2 (en) |
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| GB2407296A (en) * | 2003-10-22 | 2005-04-27 | Auto Insulations Ltd | Composite sheet insulation |
| JP2005126040A (en) * | 2003-10-02 | 2005-05-19 | Marugo Rubber Ind Co Ltd | Waterproof cover and manufacturing method thereof |
| JP2006047628A (en) * | 2004-08-04 | 2006-02-16 | Toyobo Co Ltd | Sound absorption heat insulating material |
| GB2418643A (en) * | 2003-10-22 | 2006-04-05 | Auto Insulations Ltd | Composite sheet insulation |
| JP2006292946A (en) * | 2005-04-08 | 2006-10-26 | Nissen Chemitec Corp | Sound absorption structure and sound absorption panel for automobile |
| JP2009120025A (en) * | 2007-11-14 | 2009-06-04 | Japan Vilene Co Ltd | Interior material for automobile and interior base material for automobile |
| WO2010044412A1 (en) * | 2008-10-17 | 2010-04-22 | 倉敷繊維加工株式会社 | Plate to which sound-absorbing material is attached |
| JP2010535295A (en) * | 2007-07-30 | 2010-11-18 | スリーエム イノベイティブ プロパティズ カンパニー | Porous finishing materials, acoustic damping composites, and methods for making and using them |
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| EP3246442A1 (en) * | 2017-03-17 | 2017-11-22 | Carl Freudenberg KG | Sound absorbing textile composite |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012162112A (en) | 2011-02-03 | 2012-08-30 | Hirotani:Kk | Vehicular sound insulating material and method for manufacturing the same |
| CN111527253A (en) | 2017-12-22 | 2020-08-11 | 旭化成株式会社 | Nonwoven fabric and composite sound absorbing material using same as skin material |
| KR102604135B1 (en) | 2018-12-13 | 2023-11-17 | 아사히 가세이 가부시키가이샤 | Nonwoven fabric, laminated nonwoven fabric of this nonwoven fabric, and composite sound-absorbing material using them as a skin material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5936757A (en) * | 1982-08-19 | 1984-02-29 | 株式会社クラレ | Laminate nonwoven fabric and production thereof |
| JPH03167359A (en) * | 1989-11-28 | 1991-07-19 | Toyobo Co Ltd | Vehicle interior trimming and production thereof |
| JPH10203268A (en) * | 1997-01-27 | 1998-08-04 | Nissan Motor Co Ltd | Sound insulation structure |
| JPH1158571A (en) * | 1997-08-18 | 1999-03-02 | Unitika Ltd | Sound absorbing material |
-
2000
- 2000-11-27 JP JP2000359692A patent/JP3705419B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5936757A (en) * | 1982-08-19 | 1984-02-29 | 株式会社クラレ | Laminate nonwoven fabric and production thereof |
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