JPH049899A - Sound insulator - Google Patents
Sound insulatorInfo
- Publication number
- JPH049899A JPH049899A JP2109982A JP10998290A JPH049899A JP H049899 A JPH049899 A JP H049899A JP 2109982 A JP2109982 A JP 2109982A JP 10998290 A JP10998290 A JP 10998290A JP H049899 A JPH049899 A JP H049899A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- sound insulation
- insulator
- area
- sound insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002847 sound insulator Substances 0.000 title abstract 7
- 239000011810 insulating material Substances 0.000 claims description 20
- 239000011358 absorbing material Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000005060 rubber Substances 0.000 claims description 4
- 238000004898 kneading Methods 0.000 claims description 3
- 239000000025 natural resin Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 45
- 230000000694 effects Effects 0.000 abstract description 15
- 239000012212 insulator Substances 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、吸遮音材に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a sound absorbing and insulating material.
従来より、遮音の用途として使用されるシート状の遮音
材は公知である。この遮音シートはゴム、合成樹脂、充
填材、必要に応じて各種の添加剤等を添加して、混合、
混練され、公知の加工機によりシート状に成形されて、
適宜裁断、あるいは型抜き、立体成形等により必要な形
状に成形されて、遮音の目的Ｌ：で輸送機械、工業プラ
ント、建築等産業界に広く使用されている。BACKGROUND ART Sheet-shaped sound insulating materials used for sound insulating purposes are conventionally known. This sound insulation sheet is made by mixing rubber, synthetic resin, filler, and various additives as necessary.
The mixture is kneaded and formed into a sheet using a known processing machine.
It is formed into a required shape by appropriate cutting, die cutting, three-dimensional molding, etc., and is widely used in industries such as transportation machinery, industrial plants, and architecture for the purpose of sound insulation.
従来の遮音シートは、主として高周波数帯域。 Conventional sound insulation sheets are mainly used in high frequency bands.
すなわち５００Ｈｚを超える周波数帯域の、人間の耳に
は比較的高音の音に対して遮音の効果が認められた。し
かしながら５００Ｈｚ以下の周波数帯域、いわゆる中、
低周波数帯域の音にたいしてはあまり効果が認められな
かったのが実情である。That is, a sound insulation effect was observed for relatively high-pitched sounds to the human ear in a frequency band exceeding 500 Hz. However, in the frequency band below 500Hz, the so-called medium frequency band,
The reality is that it was not very effective for sounds in the low frequency band.
これは、音の性質上１周波数が低くなると波長としては
大きくなり、従来の遮音シート程度の密度あるいは厚さ
の物質では、音波が透過してしまうためとされている。This is because, due to the nature of sound, as one frequency decreases, the wavelength increases, and sound waves will pass through a material with the same density or thickness as a conventional sound insulating sheet.
このため、満足な遮音性能を得ようとすれば。Therefore, if you want to obtain satisfactory sound insulation performance.
遮音シートの厚さを上げるか、遮音シートの充填材の割
合を増す、充填材の材料を変更する、高密度の添加物を
新たに加える１等して遮音シートの密度を増加するとい
う方法を取らねばならない。The density of the sound insulation sheet can be increased by increasing the thickness of the sound insulation sheet, increasing the proportion of the filler in the sound insulation sheet, changing the material of the filler, or adding new high-density additives. I have to take it.
これらの方法は確かにある程度有効であるが、遮音シー
トは必然的に重量増となり、輸送機械等への使用に際し
ては不利に働く上に、はとんどの方法が遮音シートにと
ってはコスト上昇につながり生産側に取っても好ましく
ない、というのが現状である。These methods are certainly effective to some extent, but the weight of the sound insulation sheet inevitably increases, which is disadvantageous when used in transportation equipment, etc., and most of the methods lead to an increase in cost for the sound insulation sheet. The current situation is that it is not desirable for the production side.
かかる現状に鑑み１本発明者等は従来の改良方法によら
ないで、中、低周波帯域の音に対して遮音効果の優れた
遮音材を開発したものである。In view of the current situation, the present inventors have developed a sound insulating material that has an excellent sound insulating effect against sounds in the middle and low frequency bands, without relying on conventional improvement methods.
防音の常識から推論すれば、遮音シートの密度は高いほ
ど中、低周波数帯域の音にたいしても遮音効果が増大す
る筈である。これは確かにこの通りなのであるが、この
方法で対策すると、遮音シートは際限無く重量が増加し
てしまう、また、低密度で通気性を有する物質の場合に
は、遮音性は期待できないが、吸音性能を有する。但し
吸音材の場合ある程度の厚さが必要であり、通常、高密
度であるが厚さの薄い遮音材と低密度で通気性のある厚
さの厚い吸音材とが、長短相補う形で組み合わされて使
用されている。Inferring from common knowledge about soundproofing, the higher the density of the soundproofing sheet, the greater the soundproofing effect against sounds in the middle and low frequency bands. This is certainly true, but if this method were used, the weight of the sound insulation sheet would increase indefinitely, and in the case of low-density and breathable materials, sound insulation properties cannot be expected. Has sound absorption performance. However, in the case of sound-absorbing materials, a certain degree of thickness is required, and usually a high-density but thin sound-insulating material and a low-density, breathable, thick sound-absorbing material are combined in a way that complements each other. has been used.
ところが、高密度の遮音シートにある特定の面積以下で
、遮音シートの全面積に対して、特定の面積を占めるよ
うに穴を開けることにより、まったく意想外にも、穴を
開けない遮音シートに比較して中、低周波数帯域の音に
たいして遮音性能が向上することが明らかとなったもの
である。However, by drilling holes in a high-density sound insulation sheet below a certain area so as to occupy a specific area of the total area of the sound insulation sheet, it is completely unexpected to create a sound insulation sheet that does not require holes. In comparison, it has been found that the sound insulation performance improves against sounds in the middle and low frequency bands.
しかして本発明の要旨は。However, the gist of the present invention is as follows.
１、ゴム、合成樹脂、天然樹脂、充填材等からなる混合
物を混合、混練、成形したシート状物において１面積が
２５００ｍｍ”以下の独立した任意の形状の穴を、シー
ト状物の全面積の０．０１〜３５％を穴が占める様に開
けたことを特徴とする遮音材。1. In a sheet material made by mixing, kneading, and molding a mixture of rubber, synthetic resin, natural resin, filler, etc., separate holes of any shape with an area of 2,500 mm or less are added to the total area of the sheet material. A sound insulating material characterized by having holes that occupy 0.01 to 35% of the area.
２、合成樹脂フオーム、フェルト、その他任意の通気性
のある吸音材料と、請求項１に記載の遮音材を積層した
ことを特徴とする防音材。2. A sound insulating material characterized by laminating the sound insulating material according to claim 1 with a synthetic resin foam, felt, or any other breathable sound absorbing material.
３、合成樹脂フオーム、フェルト、その他任意の通気性
のある吸音材料により、１ｆ求項１に記載の遮音材を両
面からサンドイッチして積層したことを特徴とする防音
材。3. A sound insulating material characterized by sandwiching and laminating the sound insulating material according to claim 1 from both sides using synthetic resin foam, felt, or any other air-permeable sound absorbing material.
に存する。exists in
遮音シートそれ自身については、従来公知のものを使用
すれば良く、軽量効果、コスト低減の観点からして、必
要以上に高密度の遮音シートを使用することはむしろ無
駄である。As for the sound insulation sheet itself, any conventionally known sound insulation sheet may be used, and from the viewpoint of weight reduction and cost reduction, it is rather wasteful to use a sound insulation sheet with a higher density than necessary.
穴についてはその１つの面積を２５Ｑ□Ｗｎ”を上限と
する。穴１つの面積がこの値を超えると。The upper limit for the area of one hole is 25Q□Wn''.If the area of one hole exceeds this value.
遮音性能全体が低下してくる。特に好ましい１つの穴の
面積としては、０．１〜１００ｍ” の範囲である。加
工作業性上の問題さえ許せば、穴１つの面積は小さけれ
ば小さい程、中、低周波数帯域の音に対する遮音性は向
上するが１通気性を失う程微細な穴の場合には所望の効
果が期待できるかどうか疑わしい。The overall sound insulation performance deteriorates. The area of one hole is particularly preferably in the range of 0.1 to 100 m''.As long as processing workability issues are allowed, the smaller the area of one hole, the better the sound insulation for medium and low frequency sounds. If the holes are so minute that they improve air permeability but impair air permeability, it is doubtful whether the desired effect can be expected.
穴の形状については特に限定は無く１円、三角形、四角
形、星型等、いかなる形でも良い、また、穴の形を１つ
の形に特定してそろえる必要も無く、様々な形が混在し
ても良い。There is no particular restriction on the shape of the hole, and it can be of any shape, such as a circle, triangle, square, or star.Also, there is no need to specify the shape of the hole to be uniform, and a variety of shapes can be used. Also good.
遮音材に対する穴の占める面積の割合は、０００１％未
満であると所望の中、低周波領域での遮音効果が得られ
ず、３５％を越えると遮音効果全体が低下する虞れが生
じる。If the ratio of the area occupied by the holes to the sound insulation material is less than 0001%, the desired sound insulation effect in the low frequency range cannot be obtained, and if it exceeds 35%, there is a risk that the overall sound insulation effect will be reduced.
穴の中心と穴の中心との距離は、１００ＷＩＱを上限と
し、特に好ましくは０．１〜５０ｍｍの範囲である。こ
の距離より離れて穴を開けた場合には、中、低周波数帯
域の音に対しての遮音性能の向上は得られない、逆に距
離が小さくなれば、中、低周波数帯域の音に対する遮音
性能は向上するが、１つの穴の面積を上限−杯で開けた
場合には、これをほとんどすきまなしに穿っては遮音シ
ート自身の構造が維持８来なくなってしまう虞れもある
ため、そもそも実現不可能である。The distance between the centers of the holes has an upper limit of 100 WIQ, and is particularly preferably in the range of 0.1 to 50 mm. If the holes are drilled further away than this distance, no improvement in sound insulation performance against mid- and low-frequency sounds will be obtained; conversely, if the distance is smaller, sound insulation against mid- and low-frequency sounds will not be achieved. Although the performance improves, if the area of each hole is made at the upper limit, there is a risk that the structure of the sound insulation sheet itself will not be maintained if it is drilled with almost no gaps. It is not possible.
よって、穴と穴との適正距離は、穴の面積の大きさ、形
状により、遮音性能や遮音シート自身の構造維持を考慮
しながら最適の値を決定することが最良である。もちろ
ん、穴の中心と穴の中心との距離が１００ｗ以下であれ
ば、その値を一定の値に軌−する必要は無く、ランダム
に開けても構わない。Therefore, it is best to determine the optimum distance between the holes, taking into consideration the sound insulation performance and the maintenance of the structure of the sound insulation sheet itself, depending on the area size and shape of the holes. Of course, as long as the distance between the centers of the holes is 100W or less, it is not necessary to set the value to a certain value, and the holes may be opened randomly.
本発明は遮音シートの密度を上げることなしに。The present invention does not require increasing the density of the sound insulation sheet.
遮音性能の向上を図った発明であるが、前記したように
遮音シートは通気性のある吸音材と組み合わせて積層さ
れた防音材として使用されることも多い、このため、本
発明になる遮音材を、合成樹脂フオーム材、フェルトと
いった従来公知の吸音材と積層しても、前記したような
遮音性能の向上による効果が低減することはなく、むし
ろ全体として優秀な防音効果のある防音材としての性能
を顕現する。さらに、遮音材と吸音材を積層して後に、
本発明の条件にて遮音材に穴を開けてもよく。This invention aims to improve sound insulation performance, but as mentioned above, sound insulation sheets are often used as laminated sound insulation materials in combination with breathable sound absorbing materials.For this reason, the sound insulation material of the present invention Even if it is laminated with conventionally known sound absorbing materials such as synthetic resin foam materials and felt, the effect of improving sound insulation performance as described above will not be reduced, but rather it will be improved as a sound insulation material with excellent sound insulation effects as a whole. Manifest performance. Furthermore, after laminating sound insulating material and sound absorbing material,
Holes may be made in the sound insulation material under the conditions of the present invention.
この場合遮音材と吸音材に連通する穴であってもかまわ
ない。In this case, it may be a hole that communicates with the sound insulating material and the sound absorbing material.
成形加工方法としては、従来公知のものが使用出来、フ
オーム材や、フェルトを本発明になる遮音材に接着して
も良いし、成形型の中に本発明になる遮音材をセットし
、フオーム材の反応液を型内に注入するインジェクショ
ンモールディング法によれば任意の形に成形可能である
。As a molding method, conventionally known methods can be used, such as bonding a foam material or felt to the sound insulating material of the present invention, or setting the sound insulating material of the present invention in a mold and forming the foam. By injection molding, in which a reaction solution of the material is injected into a mold, it can be molded into any shape.
さらに１本発明になる遮音材を前記公知の吸音材にてサ
ンドイッチ状に両側よりはさみ込む構成を利用しても良
く、この場合にも優秀な防音性を顕現する。Furthermore, a configuration may be used in which the sound insulating material of the present invention is sandwiched between the known sound absorbing materials from both sides, and excellent sound insulating properties can also be achieved in this case.
本発明になる遮音材は、従来の遮音材が５００Ｈｚを超
える高周波数帯域の音を中心に遮音性能を有していたこ
とに加えて、５００Ｈｚ以下の中。The sound insulation material of the present invention has a sound insulation performance mainly for sounds in a high frequency band exceeding 500 Hz, in addition to the sound insulation performance of conventional sound insulation materials mainly for sounds in a high frequency band exceeding 500 Hz.
低周波数帯域の音に対しても、優れた遮音性能を示し、
さらに１通気性を有する吸音材と積層、もしくは両側よ
りサンドイッチした３層構造の防音材に使用すれば、全
体として更に優れた防音効果を顕現し１発生する音を全
ての周波数帯域に渡って遮断することができる。Demonstrates excellent sound insulation performance even against sounds in the low frequency band,
Furthermore, if it is used in a three-layered soundproofing material that is laminated with a breathable sound absorbing material or sandwiched from both sides, it will achieve an even better soundproofing effect as a whole, and will block the generated sound across all frequency bands. can do.
以下に実施例を挙げ本発明のより詳細な理解に供する。 Examples are given below to provide a more detailed understanding of the present invention.
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。Naturally, the present invention is not limited to the following examples.
実施例
スチレン−ブタジェンゴム３０重量部、再生ゴム１４重
量部、ポリエチレン５重量部、石油樹脂１０重量部、炭
酸カルシウム４０重量部、カーボンブラック０．５重量
部、経時劣化防止剤０．５重量部の配合からなる組成物
を混合、攪拌し、混練したあと、カレンダーロールにて
厚さ２Ｉの遮音シートを得た。この遮音シートを一辺を
１ｍとする正方形に裁断して１ボの遮音シートとし、こ
れを供試料として、以下の各種試験を行なった。Examples 30 parts by weight of styrene-butadiene rubber, 14 parts by weight of recycled rubber, 5 parts by weight of polyethylene, 10 parts by weight of petroleum resin, 40 parts by weight of calcium carbonate, 0.5 parts by weight of carbon black, and 0.5 parts by weight of anti-aging agent. After mixing, stirring, and kneading the composition, a sound insulating sheet having a thickness of 2I was obtained using a calendar roll. This sound insulation sheet was cut into a square with a side of 1 m to obtain a 1-board sound insulation sheet, and the following various tests were conducted using this as a sample.
実施例１
直径５Ｉの円（面積約１９．６ｍ＋＋”）を中心と中心
の距離を５０ｍ＋として、供試料の全面に均等に開けた
。（穴の面積約０．７％）
実施例２
一辺が２０ｍの正方形（面積４００ｍ”）を中心と中心
の距離を１００閣として、供試料の全面に均等に開けた
。（穴の面積約３．２％）実施例３
直径２ｍの円（面積約３．１ｍ”）を中心と中心の距離
を１２．５ｍとして、供試料の全面に均等に開けた。（
穴の面積約１．９％）
実施例４
一辺がｌｏｗの正方形（面積Ｌｏｏｍ”）を中心と中心
の距離を最大１００ｍとして、供試料の全面にランダム
に開けた。（穴の面積約１．６％）比較例
供試料になにも手を加えず、そのままの形とした。Example 1 A circle with a diameter of 5I (area of about 19.6 m++") was made evenly over the entire surface of the sample with a distance of 50 m+ between centers. (Area of the hole was about 0.7%) Example 2 One side was A 20m square (area 400m'') was opened evenly over the entire surface of the specimen, with a distance of 100 squares from center to center. (The area of the hole is about 3.2%) Example 3 A circle with a diameter of 2 m (area of about 3.1 m") was made evenly over the entire surface of the sample, with the distance between the centers being 12.5 m. (
(The area of the holes is approximately 1.9%) Example 4 Squares with one side of low (area Loom) are randomly drilled on the entire surface of the specimen, with the distance between the centers being at most 100 m. (The area of the holes is approximately 1.9%). 6%) Comparative Example The sample was left in its original form without any modification.
試験方法
ＪＩＳ−Ａ１４１６に規定される。音響透過損失測定方
法により、音源側と遮音側の音圧レベルを測定し、その
差より遮音性能を評価した。Specified in test method JIS-A1416. The sound pressure level on the sound source side and the sound insulation side was measured using the sound transmission loss measurement method, and the sound insulation performance was evaluated based on the difference.
結果
表１
（表中の単位はｄＢ）
〔発明の効果〕
本発明による遮音材は、従来の遮音材と比較して、高周
波数帯域において遮音性能がなんら劣ること無く、５０
０Ｈｚ以下の中、低周波数帯域において、Ｒ低でも３ｄ
Ｂ、最高では１０ｃｌＢの遮音効果の向上が見られた。Results Table 1 (Units in the table are dB) [Effects of the Invention] The sound insulation material according to the present invention has no inferiority in sound insulation performance in the high frequency band compared to conventional sound insulation materials, and has a
In the middle and low frequency bands below 0Hz, 3d even with low R
B. The sound insulation effect was improved by 10 clB at the maximum.
本発明の遮音材を使用すれば、遮音材の密度。If the sound insulation material of the present invention is used, the density of the sound insulation material.
重量を増加することなく、従来の遮音材においては遮音
対策が満足ではなかった５００Ｈｚ以下の中、低周波数
帯域の遮音性能を著しく向上できる。Without increasing weight, the sound insulation performance in the low frequency band below 500 Hz, where conventional sound insulation materials have not been satisfactory in sound insulation measures, can be significantly improved.
本発明は、遮音材そのものは従来の遮音材をそのまま使
用できるため、生産設備に何等新しいものを必要とせず
、従来品よりすみやかに遮音性能の向上が図れる点にお
いても、画期的なものであると言うことが出来る。The present invention is epoch-making in that it does not require any new production equipment because conventional sound insulating materials can be used as is, and the sound insulating performance can be improved more quickly than conventional products. I can say that there is.
Claims (1)
物を混合、混練、成形したシート状物において、面積が
２５００ｍｍ＾２以下の独立した任意の形状の穴を、シ
ート状物の全面積の０．０１〜３５％を穴が占める様に
開けたことを特徴とする遮音材。 ２、合成樹脂フォーム、フェルト、その他任意の通気性
のある吸音材料と、請求項１に記載の遮音材を積層した
ことを特徴とする防音材。 ３、合成樹脂フォーム、フェルト、その他任意の通気性
のある吸音材料により、請求項１に記載の遮音材を両面
からサンドイッチして積層したことを特徴とする防音材
。[Claims] 1. In a sheet-like product made by mixing, kneading, and molding a mixture of rubber, synthetic resin, natural resin, filler, etc., independent holes of any shape with an area of 2500 mm^2 or less, A sound insulating material characterized in that holes occupy 0.01 to 35% of the total area of a sheet-like material. 2. A sound insulating material characterized by laminating the sound insulating material according to claim 1 with synthetic resin foam, felt, or any other breathable sound absorbing material. 3. A sound insulating material, characterized in that the sound insulating material according to claim 1 is sandwiched and laminated from both sides with synthetic resin foam, felt, or any other breathable sound absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2109982A JPH049899A (en) | 1990-04-27 | 1990-04-27 | Sound insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2109982A JPH049899A (en) | 1990-04-27 | 1990-04-27 | Sound insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH049899A true JPH049899A (en) | 1992-01-14 |
Family
ID=14524083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2109982A Pending JPH049899A (en) | 1990-04-27 | 1990-04-27 | Sound insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH049899A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0684902A1 (en) * | 1991-02-20 | 1995-12-06 | Indian Head Industries, Inc. | Insulating laminate |
| JP2006160197A (en) * | 2004-12-10 | 2006-06-22 | Kureha Ltd | Interior trim material for vehicle good in sound absorbing performance |
| GB2475025A (en) * | 2009-07-28 | 2011-05-11 | Zephyros Inc | Laminate, for vehicle, includes foam layer and anchorage holes |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60135997A (en) * | 1983-12-26 | 1985-07-19 | 株式会社日立製作所 | sound absorbing material |
-
1990
- 1990-04-27 JP JP2109982A patent/JPH049899A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60135997A (en) * | 1983-12-26 | 1985-07-19 | 株式会社日立製作所 | sound absorbing material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0684902A1 (en) * | 1991-02-20 | 1995-12-06 | Indian Head Industries, Inc. | Insulating laminate |
| EP0684902A4 (en) * | 1991-02-20 | 1996-03-20 | Indian Head Inc | Insulating laminate. |
| JP2006160197A (en) * | 2004-12-10 | 2006-06-22 | Kureha Ltd | Interior trim material for vehicle good in sound absorbing performance |
| JP4626969B2 (en) * | 2004-12-10 | 2011-02-09 | 呉羽テック株式会社 | Vehicle interior material with excellent sound absorption performance |
| GB2475025A (en) * | 2009-07-28 | 2011-05-11 | Zephyros Inc | Laminate, for vehicle, includes foam layer and anchorage holes |
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