JP3188592B2 - Prevention of dirt on sound absorbing material - Google Patents
Prevention of dirt on sound absorbing materialInfo
- Publication number
- JP3188592B2 JP3188592B2 JP14070494A JP14070494A JP3188592B2 JP 3188592 B2 JP3188592 B2 JP 3188592B2 JP 14070494 A JP14070494 A JP 14070494A JP 14070494 A JP14070494 A JP 14070494A JP 3188592 B2 JP3188592 B2 JP 3188592B2
- Authority
- JP
- Japan
- Prior art keywords
- sound
- sound absorbing
- ceiling
- film
- absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸音材、特に自動車の
内装材に使用される成形吸音天井材、パーセルシェル
フ、ドアトリム等の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing material, and more particularly to a structure such as a molded sound absorbing ceiling material, a parcel shelf, and a door trim used for an interior material of an automobile.
【０００２】[0002]
【従来の技術】従来より、車室内に使用される内装材に
ついては、その質感、意匠性などと共に車室内に浸入す
る騒音の吸音性について優れる素材が検討、使用されて
きた。そのような材料としては、グラスウール、レジン
フェルト、各種の合成樹脂フォーム材等が好適に使用さ
れている。これらの基材は共通して吸音性を有するが、
その原理は多孔質による通気性のためであり、従って吸
音基材の表面に化粧のため貼られる表皮材についても、
吸音性を活かすために通気性を有する材料が使用されて
いる。2. Description of the Related Art Heretofore, as for interior materials used in a vehicle interior, materials having excellent texture, design, etc., and excellent sound absorption of noise entering the vehicle interior have been studied and used. As such a material, glass wool, resin felt, various synthetic resin foam materials and the like are suitably used. Although these substrates have sound absorption in common,
The principle is due to the air permeability of the porous material, so the skin material that is applied for makeup on the surface of the sound absorbing substrate,
A material having air permeability is used to take advantage of sound absorption.
【０００３】しかし、吸音材が通気性を有するという事
は、車室内の汚染空気等が吸音材を通過するという事で
あり、その結果吸音材が言わばフィルターの役目となっ
てしまって表面の表皮材が著しく汚染される、という不
具合が発生している。表皮材に通気性の無い材料を使用
すれば、この問題は解決するが、その場合には吸音基材
の吸音性が全く損なわれてしまう。また、特公平３−２
４３９０号には、吸音構造として、吸音材の周縁部にシ
ートを接合する一方で、それ以外の部分は１０mm程度の
空気室を設けるように気密性を有するシートを配設する
技術が開示されている。しかしながら、空気室を設ける
ためには余裕を持たせてシートを吸音材に配設しなけれ
ばならず複雑な工程となり、工程的にコストがかかり、
しかも気密性を有するシートそのものは空気室を形成す
るためだけに機能しており、シートは吸音性能にはなん
ら寄与していない。However, the fact that the sound-absorbing material has air permeability means that contaminated air and the like in the passenger compartment pass through the sound-absorbing material, and as a result, the sound absorbing material functions as a filter, so that the surface of the surface is covered. There is a problem that the material is significantly contaminated. If a material having no air permeability is used for the skin material, this problem can be solved, but in that case, the sound absorbing property of the sound absorbing base material is impaired at all. In addition, 3-2
No. 4390 discloses a technique in which, as a sound absorbing structure, a sheet is bonded to a peripheral portion of a sound absorbing material, and an airtight sheet is provided so as to provide an air chamber of about 10 mm in other portions. I have. However, in order to provide the air chamber, the sheet must be arranged on the sound absorbing material with a margin, which is a complicated process, and the process is costly.
Moreover, the airtight sheet itself functions only to form the air chamber, and the sheet does not contribute to the sound absorbing performance at all.
【０００４】[0004]
【発明が解決しようとする課題】本発明の課題は、吸音
材の吸音性能を従来の吸音材と同等あるいはそれ以上に
維持しつつ、吸音材の表皮材や吸音基材の汚れを防止す
る、吸音材の構造を開発する点にある。SUMMARY OF THE INVENTION An object of the present invention is to prevent the surface of a sound absorbing material and a sound absorbing substrate from being stained while maintaining the sound absorbing performance of the sound absorbing material equal to or higher than that of the conventional sound absorbing material. The point is to develop the structure of the sound absorbing material.
【０００５】[0005]
【課題を解決するための手段】かかる課題を解決せんと
して、本発明者らは鋭意研究の結果、表皮材の貼られた
吸音材の反対側に、空気の流通を阻止するフィルムを密
着させ、その密着方法は吸音基材の周辺部、及び必要に
応じて開けられる吸音基材の穴部の周辺部にのみ接着す
るという方法により上記課題を解決する吸音材の構造を
開発したものである。しかして本発明の要旨は、Means for Solving the Problems In order to solve such problems, the inventors of the present invention have conducted intensive studies and, as a result, adhered a film for blocking the flow of air to the opposite side of the sound absorbing material to which the skin material was attached, The adhesion method is to develop a structure of a sound absorbing material which solves the above-mentioned problem by a method of bonding only to a peripheral portion of the sound absorbing base material and a peripheral portion of a hole portion of the sound absorbing base material that can be opened as needed. Thus, the gist of the present invention is
【０００６】表皮材、吸音基材、１０μｍ以上の膜厚の
熱可塑性樹脂フィルムの順に積層一体化されている吸音
材の構造であって、吸音基材と熱可塑性樹脂フィルムと
が密着しつつ、吸音基材の周辺部、及び吸音基材の穴部
周辺部のみを１０μｍ以上の膜厚の熱可塑性樹脂フィル
ムと接着していることを特徴とする、吸音材の汚れ防止
構造、に存する。The sound absorbing material has a structure in which a skin material, a sound absorbing base material, and a thermoplastic resin film having a thickness of 10 μm or more are laminated and integrated in this order, and the sound absorbing base material and the thermoplastic resin film adhere to each other. A structure for preventing contamination of a sound absorbing material, characterized in that only a peripheral portion of the sound absorbing substrate and a peripheral portion of a hole of the sound absorbing substrate are bonded to a thermoplastic resin film having a thickness of 10 μm or more.
【０００７】本発明において使用される表皮材、吸音基
材は吸音性、即ち通気性を有する材料であれば制限無く
使用できる。例示すれば、従来使用されてきた不織布、
合成樹脂フォーム材、合成樹脂シート、レジンフェル
ト、グラスウール、ロックウール等が例示できる。The skin material and the sound-absorbing substrate used in the present invention can be used without limitation as long as they are sound-absorbing, that is, air-permeable materials. For example, non-woven fabrics conventionally used,
Examples include synthetic resin foam materials, synthetic resin sheets, resin felt, glass wool, rock wool, and the like.
【０００８】本発明において使用される熱可塑性樹脂フ
ィルムとしては、ポリエチレン、ポリエチレンテレフタ
レート、ポリスチレン、ポリプロピレンや、これらの共
重合体等が例示できる。特に、１０μｍ以上の膜厚のフ
ィルムであって、充分な強度と気密性を有するフィルム
が望ましい。１０μｍ未満のフィルムであると必要な強
度が確保されない虞れが有り、吸音材の取付作業時に破
損すると気密性がなくなり、汚れ防止効果が期待出来な
い。又、１０μｍ以上で適宜膜厚を変化させる事によっ
て、汚れ防止効果には何らの影響を与えずに、吸音特性
のチューニング、即ち吸音性能のピークを必要な周波数
帯域にシフトさせる事が可能となる。例えば１０〜１５
μｍの膜厚のフィルムでは、吸音性能のピークは、概ね
３０００Ｈｚ付近の周波数となり、１５〜２０μｍの膜
厚のフィルムでは、吸音性能のピークは、概ね２０００
Ｈｚ付近の周波数となる。Examples of the thermoplastic resin film used in the present invention include polyethylene, polyethylene terephthalate, polystyrene, polypropylene, and copolymers thereof. In particular, a film having a thickness of 10 μm or more and having sufficient strength and airtightness is desirable. If the film has a thickness of less than 10 μm, the required strength may not be ensured. If the film is damaged during the installation of the sound absorbing material, the airtightness is lost, and the effect of preventing contamination cannot be expected. Further, by appropriately changing the film thickness at 10 μm or more, it becomes possible to tune the sound absorption characteristic, that is, shift the peak of the sound absorption performance to a required frequency band without affecting the stain prevention effect at all. . For example, 10-15
In a film having a film thickness of μm, the peak of the sound absorbing performance becomes a frequency around 3000 Hz, and in a film having a film thickness of 15 to 20 μm, the peak of the sound absorbing performance becomes approximately 2000.
Hz.
【０００９】汚れ防止、及び吸音のためには、吸音基材
に接着するものはフィルムのみで良いが、フィルムの表
面は通常非常に平滑な状態なので、車両に吸音材を取り
付けた後に擦れ音が発生する場合がある。このため、必
要に応じて熱可塑性樹脂フィルムに不織布を積層してお
くことによって、擦れ音の発生が防止できる。積層方法
は、従来公知のラミネート法等が使用できる。不織布の
ラミネートによって、薄膜である熱可塑性樹脂フィルム
の補強効果も得られる。For the purpose of preventing dirt and absorbing sound, only the film may be adhered to the sound absorbing base material. However, since the surface of the film is usually in a very smooth state, the rubbing noise is generated after the sound absorbing material is attached to the vehicle. May occur. Therefore, by laminating the nonwoven fabric on the thermoplastic resin film as required, the generation of the rubbing noise can be prevented. As a lamination method, a conventionally known lamination method or the like can be used. By laminating the nonwoven fabric, a reinforcing effect of the thin thermoplastic resin film can be obtained.
【００１０】吸音基材と熱可塑性樹脂フィルムとの接着
部位としては、吸音基材の周辺部分全周の他、吸音基材
に必要に応じて開けられる穴部の周囲全周が挙げられ
る。必要に応じて開けられる穴部とは、例えば自動車用
天井材であると、天井材をルーフパネルに取り付けるた
めのブランケット、天井に設置される室内灯、サンルー
フ等のための穴部である。これらの穴部周囲を接着しな
いと、未接着部分より空気が浸入し、密封が破られて通
気性が発生し、汚れ防止効果が得られない虞れがある。The bonding portion between the sound-absorbing substrate and the thermoplastic resin film includes, in addition to the entire periphery of the peripheral portion of the sound-absorbing substrate, the entire periphery of a hole formed in the sound-absorbing substrate as needed. The holes that can be opened as needed include, for example, a ceiling material for an automobile, a blanket for attaching the ceiling material to a roof panel, a room light installed on the ceiling, a hole for a sunroof, and the like. If the periphery of these holes is not adhered, air may infiltrate from the unadhered portion, the seal may be broken, air permeability may be generated, and there is a possibility that the stain prevention effect may not be obtained.
【００１１】接着に使用される接着剤としては、エポキ
シ樹脂系、ポリウレタン樹脂系等の２液型接着剤、エチ
レン−酢酸ビニル樹脂系等の感圧１液型接着剤、ホット
メルト型接着剤等従来公知の接着剤が特に限定せずに使
用できる。Examples of the adhesive used for bonding include a two-component adhesive such as an epoxy resin or a polyurethane resin, a pressure-sensitive one-component adhesive such as an ethylene-vinyl acetate resin, and a hot melt adhesive. Conventionally known adhesives can be used without particular limitation.
【００１２】熱可塑性樹脂フィルムの厚さを、１０μ以
上の膜厚において変化させてやることによって、吸音率
のピークとなる音周波数を変えることが出来る。吸音基
材の吸音特性及びフィルムの厚さの組み合わせによっ
て、最も対策の必要な音周波数の吸音率を最大に調整す
ることが出来るため、合理的な防音対策、防音材の材料
選定に役立つ。By changing the thickness of the thermoplastic resin film at a thickness of 10 μm or more, the sound frequency at which the sound absorption coefficient reaches its peak can be changed. The combination of the sound absorbing properties of the sound absorbing base material and the thickness of the film allows the sound absorption coefficient of the sound frequency requiring the most measures to be adjusted to the maximum, which is useful for rational soundproofing measures and material selection of soundproofing materials.
【００１３】[0013]
【実施例】以下に実施例を挙げ本発明のより詳細な理解
に供する。当然のことながら本発明は以下の実施例のみ
に限定されるものではない。The following examples are provided to provide a more detailed understanding of the present invention. As a matter of course, the present invention is not limited only to the following examples.
【００１４】[0014]
【実施例１】動植物性繊維原料、ガラスウール、綿を原
料として、これらをニードルフィーダー等の開繊機によ
って開繊し、粉体フェノール樹脂を散布してフリースを
作成し、加熱して半硬化状態の原反となした。この原反
を自動車用吸音成形天井材成形用の、金属製成形金型の
下型に載置して、上型を降下させ、加熱加圧成形により
吸音成形天井基材となした。この天井基材には、略中央
部に天井材取付用の穴が開いている。該天井基材の車室
内側に、通気性を有する不織布を原材料とした表皮材を
貼り、反対側にはポリエチレンテレフタレートによる膜
厚１３μの熱可塑性樹脂フィルムを、天井基材の外周
部、及び穴部の周囲をエチレン−酢酸ビニル樹脂系接着
剤により貼り、天井材１を得た。Example 1 A raw material of animal and plant fiber, glass wool, and cotton are used as raw materials, the fiber is opened by a fiber opener such as a needle feeder, and a phenolic resin powder is sprinkled to produce a fleece, which is heated to a semi-cured state. It became a web. This raw material was placed on a lower mold of a metal molding die for molding a sound-absorbing molded ceiling material for an automobile, and the upper mold was lowered to form a sound-absorbing molded ceiling base material by heating and pressing. This ceiling base material has a hole for mounting a ceiling material substantially at the center. A skin material made of a nonwoven fabric having air permeability is attached to the interior side of the ceiling base material, and a 13 μm-thick thermoplastic resin film made of polyethylene terephthalate is provided on the opposite side. The periphery of the portion was adhered with an ethylene-vinyl acetate resin-based adhesive to obtain a ceiling material 1.
【００１５】[0015]
【比較例１】実施例１と同じ天井基材の車室内側に、塩
化ビニル樹脂を原料とする通気性の無い表皮材を貼り、
天井材２を得た。[Comparative Example 1] A non-breathable skin material made of vinyl chloride resin was attached to the same interior of the ceiling base as in Example 1,
The ceiling material 2 was obtained.
【００１６】[0016]
【比較例２】実施例１と同じ天井基材の車室内側に、実
施例１と同じ通気性を有する不織布を原材料とした表皮
材を貼り、反対側にはポリエチレンテレフタレートによ
る厚膜１３μの熱可塑性樹脂フィルムを天井基材の全面
にわたってエチレン−酢酸ビニル樹脂系接着剤により貼
り、天井材３を得た。[Comparative Example 2] A skin material made of a nonwoven fabric having the same air permeability as in Example 1 was attached to the same ceiling base material as in Example 1 on the vehicle interior side, and a heat treatment of 13 μm thick polyethylene terephthalate film was applied to the opposite side. A plastic resin film was adhered over the entire surface of the ceiling substrate with an ethylene-vinyl acetate resin-based adhesive to obtain a ceiling material 3.
【００１７】[0017]
【試験方法】ＪＩＳ Ａ１４０９により規定される「残
響室吸音率」により、天井材１〜天井材３の吸音率を測
定した。小型残響室所定箇所に測定する天井材を設置
し、ラウドスピーカーによって特定周波数の音を発生さ
せ、マイクロホンによってその音を記録し、５００Ｈｚ
〜８０００Ｈｚの周波数の音に対する吸音率を測定し
た。 吸音率は以下の式により求められる。 α＝５５．３Ｖ／ＣＳ（１／Ｔ1−１／Ｔ2） ここで、 α：吸音率 Ｔ1：試料を入れた残響時間（Ｓ） Ｔ2：空室時の残響時間（Ｓ） Ｖ：残響室の容積（ｍ3） Ｓ：試料面積（ｍ2） Ｃ：空気中の音速（ｍ／Ｓ） である。[Test method] The sound absorption coefficient of the ceiling material 1 to the ceiling material 3 was measured according to “Reverberation room sound absorption coefficient” specified by JIS A1409. A ceiling material to be measured is installed at a predetermined location in a small reverberation room, a sound of a specific frequency is generated by a loudspeaker, and the sound is recorded by a microphone.
The sound absorptivity for sound with a frequency of ８8000 Hz was measured. The sound absorption coefficient is obtained by the following equation. α = 55.3V / CS (1 / T 1 −1 / T 2 ) where α: sound absorption coefficient T 1 : reverberation time (S) with a sample placed T 2 : reverberation time in an empty room (S) V : Volume of reverberation chamber (m 3 ) S: Sample area (m 2 ) C: Sound velocity in air (m / S)
【００１８】[0018]
【結果】結果を、図１に示す。図１は、縦軸に吸音率
（α）、横軸に周波数（Ｈｚ）を取ったグラフである。[Results] The results are shown in FIG. FIG. 1 is a graph in which the ordinate represents the sound absorption coefficient (α) and the abscissa represents the frequency (Hz).
【００１９】[0019]
【発明の効果】本発明になる吸音材の汚れ防止構造によ
れば、従来の汚れ防止対策を施した、吸音材に比較して
もなお優れた吸音特性を示し、さらに吸音性能は劣るも
のの汚れ防止効果を有する構造の吸音材と、なんら遜色
の無い汚れ防止効果を有するものである。自動車の成形
天井材、ドアトリム、パーセルシェルフ等の内装材、建
築用の室内天井吸音材、吸音壁材等に応用出来、その効
果は高い。According to the structure for preventing contamination of a sound-absorbing material according to the present invention, excellent sound-absorbing characteristics are obtained as compared with a sound-absorbing material which has been subjected to conventional measures for preventing contamination. It is a sound absorbing material having a structure having an effect of preventing contamination, and has an effect of preventing contamination which is comparable to that of the sound absorbing material. It can be applied to interior materials such as molded ceiling materials for automobiles, door trims, parcel shelves, etc .;
【図１】天井材１〜３について周波数毎に測定された吸
音率を表したグラフである。横軸に周波数（Ｈｚ）、縦
軸に吸音率（α）をとり、実線は天井材１、点線は天井
材２、一点鎖線は天井材３の、それぞれ吸音率を表して
いる。FIG. 1 is a graph showing sound absorption coefficients measured for each frequency of ceiling materials 1 to 3. The horizontal axis represents frequency (Hz) and the vertical axis represents sound absorption coefficient (α). The solid line represents the ceiling material 1, the dotted line represents the ceiling material 2, and the dashed line represents the ceiling material 3.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B60R 13/02 B32B 27/12 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B60R 13/02 B32B 27/12
Claims (1)
の熱可塑性樹脂フィルムの順に積層一体化されている吸
音材の構造であって、吸音基材と熱可塑性樹脂フィルム
とが密着しつつ、吸音基材の周辺部、及び吸音基材の穴
部周辺部のみを１０μｍ以上の膜厚の熱可塑性樹脂フィ
ルムと接着していることを特徴とする、吸音材の汚れ防
止構造。1. A structure of a sound absorbing material in which a skin material, a sound absorbing base material, and a thermoplastic resin film having a thickness of 10 μm or more are laminated and integrated in this order, wherein the sound absorbing base material and the thermoplastic resin film are in close contact with each other. In addition, only the peripheral portion of the sound absorbing base material and the peripheral portion of the hole portion of the sound absorbing base material are bonded to a thermoplastic resin film having a film thickness of 10 μm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14070494A JP3188592B2 (en) | 1994-06-01 | 1994-06-01 | Prevention of dirt on sound absorbing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14070494A JP3188592B2 (en) | 1994-06-01 | 1994-06-01 | Prevention of dirt on sound absorbing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07323789A JPH07323789A (en) | 1995-12-12 |
| JP3188592B2 true JP3188592B2 (en) | 2001-07-16 |
Family
ID=15274795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14070494A Expired - Fee Related JP3188592B2 (en) | 1994-06-01 | 1994-06-01 | Prevention of dirt on sound absorbing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3188592B2 (en) |
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| US8559694B2 (en) | 2005-10-05 | 2013-10-15 | Cummins-Allison Corp. | Currency processing system with fitness detection |
| US8701857B2 (en) | 2000-02-11 | 2014-04-22 | Cummins-Allison Corp. | System and method for processing currency bills and tickets |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4901641B2 (en) * | 2007-08-20 | 2012-03-21 | 日泉化学株式会社 | Anti-noise structure |
-
1994
- 1994-06-01 JP JP14070494A patent/JP3188592B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7735621B2 (en) | 1996-05-29 | 2010-06-15 | Cummins-Allison Corp. | Multiple pocket currency bill processing device and method |
| US8701857B2 (en) | 2000-02-11 | 2014-04-22 | Cummins-Allison Corp. | System and method for processing currency bills and tickets |
| US9129271B2 (en) | 2000-02-11 | 2015-09-08 | Cummins-Allison Corp. | System and method for processing casino tickets |
| US8559694B2 (en) | 2005-10-05 | 2013-10-15 | Cummins-Allison Corp. | Currency processing system with fitness detection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07323789A (en) | 1995-12-12 |
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