JPH05718B2 - - Google Patents
Info
- Publication number
- JPH05718B2 JPH05718B2 JP58075464A JP7546483A JPH05718B2 JP H05718 B2 JPH05718 B2 JP H05718B2 JP 58075464 A JP58075464 A JP 58075464A JP 7546483 A JP7546483 A JP 7546483A JP H05718 B2 JPH05718 B2 JP H05718B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- long fibers
- structural member
- soundproof
- heat 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 claims description 44
- 229920005989 resin Polymers 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- 238000010304 firing Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 15
- 239000002657 fibrous material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Description
【発明の詳細な説明】
本発明は、防音断熱構造部材に関し、特に、振
動源、熱源を有する車輌等に用いて好適な防音断
熱構造部材に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soundproof and heat insulating structural member, and particularly to a soundproof and heat insulating structural member suitable for use in a vehicle having a vibration source and a heat source.
自動車等において、動力源であるエンジンは、
エネルギー変換に伴ない振動や熱を発生し、振動
源、熱源ともなるので、エンジンの発生する振動
や熱がエアクリーナ等の他の装置に悪影響を及ぼ
したり、振動によつてエンジンケースやボンネツ
ト等の外板が共鳴して騒音を発生することにな
る。このような問題が生じないように、エンジン
自体或いは他の装着の外板に防音、断熱対策を施
す必要があるが、かかる課題を解決するにあたつ
て満足し得るのが未だ得られていない。 In automobiles, etc., the engine that is the power source is
As energy conversion generates vibration and heat, the engine also becomes a source of vibration and heat, so the vibration and heat generated by the engine can have an adverse effect on other equipment such as air cleaners, and the vibration can cause damage to the engine case, bonnet, etc. The outer panels will resonate and generate noise. In order to prevent such problems from occurring, it is necessary to take soundproofing and heat insulating measures to the engine itself or other attached outer panels, but a satisfactory solution to these problems has not yet been achieved. .
本発明は、かかる事情に鑑みなされたものであ
つて、構成簡単にして優れた防音、断熱効果を得
ることができる防音断熱構造部材を提供すること
を目的とする。 The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a soundproof and heat insulating structural member that has a simple structure and can obtain excellent soundproofing and heat insulating effects.
本発明による防音断熱構造部材は、綿状に混合
されたガラス長繊維、有機の長繊維及び無機の長
繊維の少なくとも一つからなる繊維層と、前記繊
維層の一方の表面に層状に加圧焼成にて一体形成
された硬質樹脂とからなることを特徴とする。 The soundproofing and heat-insulating structural member according to the present invention includes a fiber layer made of at least one of glass long fibers, organic long fibers, and inorganic long fibers mixed in the form of cotton, and a layered layer formed on one surface of the fiber layer. It is characterized by being made of a hard resin that is integrally formed by firing.
かかる構成により、構造簡単にして防振、防音
及び断熱作用が奏されるものである。 With this configuration, the structure can be simplified and vibration-proofing, sound-proofing, and heat-insulating effects can be achieved.
以下、本発明の実施例を添付図面を用いて詳細
に説明する。 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
第１図において、１は繊維層を形成し防音断熱
構造部材の基材となる成型繊維材であり、この成
型繊維材１は、ガラス長繊維、有機の長繊維及び
無機の長繊維の少なくとも一つを適当な長さに裁
断し、混合、拡散した後、層状に積層し、得られ
る綿状の繊維をローラ加圧及びニードリングして
マツト状の繊維シートとし、これに水ガラス等の
無機の結合剤を塗布又は含浸させ、しかる後加圧
焼成することによつて得られる。このシート状の
成型繊維材１は使用目的に応じて所望の形状に形
状抜きされる。 In FIG. 1, numeral 1 is a molded fiber material that forms a fiber layer and serves as a base material for the soundproof and heat-insulating structural member. After cutting the fibers into appropriate lengths, mixing and spreading them, they are laminated in layers, and the resulting cotton-like fibers are pressed and needled with rollers to form a mat-like fiber sheet, which is then coated with inorganic materials such as water glass. It can be obtained by applying or impregnating a binder and then firing under pressure. This sheet-like molded fiber material 1 is cut into a desired shape depending on the intended use.
形状抜きされた成型繊維材１の一方の表面（外
表面）には、硬質材層２が層状に形成される。硬
質材としては例えばフエノール樹脂、エポキシ樹
脂、ポリエステル等の熱硬化性樹脂が用いられ
る。この樹脂が液状の場合、成型繊維材１の表面
に、吹付け若しくは刷毛塗りによつて塗布され、
板状の場合には貼り付けられる。また、防音断熱
構造部材を周囲温度が低い場所に使用する場合に
は、硬質材として熱硬化性樹脂を用いることも可
能であり、この場合は、一度成型繊維材１を加熱
し、熱可塑性樹脂を塗布した後型にて加圧し、し
かる後冷却し、脱型する。 A hard material layer 2 is formed in a layered manner on one surface (outer surface) of the shaped fiber material 1. As the hard material, for example, thermosetting resins such as phenol resins, epoxy resins, and polyesters are used. When this resin is liquid, it is applied to the surface of the molded fiber material 1 by spraying or brushing,
If it is plate-shaped, it can be pasted. Furthermore, when using the soundproof and heat insulating structural member in a place where the ambient temperature is low, it is also possible to use a thermosetting resin as the hard material. In this case, once the molded fiber material 1 is heated, the thermoplastic resin After coating, pressure is applied in a mold, then cooled and demolded.
成型繊維材１は、ガラス繊維、有機の長繊維及
び無機の長繊維のいずれか一つのみからなつても
良く、又これらの適当な組合せからなつても良
い。有機の長繊維としては、ポリエステル或いは
塩化ビニール等があり、無機の長繊維としてはセ
ラミツク等がある。有機の長繊維を用いることに
より、繊維自身の比重が低いので、成型繊維材１
全体の重量を低減でき、又添着する硬質材層２と
のなじみが良くなり、成型繊維材１と硬質材層２
と結合が強固になされる。 The molded fiber material 1 may be made of only one of glass fibers, organic long fibers, and inorganic long fibers, or may be made of a suitable combination thereof. Examples of organic long fibers include polyester or vinyl chloride, and examples of inorganic long fibers include ceramics. By using organic long fibers, the specific gravity of the fibers themselves is low, so molded fiber material 1
The overall weight can be reduced, and the compatibility with the attached hard material layer 2 is improved, so that the molded fiber material 1 and the hard material layer 2
The bond is made strong.
このようにして得られた防音断熱構造部材３
は、平板形状は勿論のこと、如何なる形状にも型
成形が可能であり、型挿入後油圧プレス等で加圧
され、成型条件に応じた温度、時間で加熱され、
脱型工程、トリミング工程を経て使用目的に応じ
た形状に成形され、そのまま防音断熱機能を有す
る各種外板、例えば第５図に示された空冷エンジ
ン６のフアンカバー７やシユラウド８、第６図に
示された二輪用エアクリーナケース９、第７図に
示されたスクータ１０のボデイカバー１１として
用いられる。 Soundproofing and heat insulation structural member 3 obtained in this way
can be molded into any shape as well as a flat plate shape, and after being inserted into the mold, it is pressurized with a hydraulic press, etc., and heated at a temperature and time depending on the molding conditions.
Various outer panels that are molded into a shape according to the purpose of use through a demolding process and a trimming process and have sound and heat insulation functions as they are, such as the fan cover 7 and shroud 8 of the air-cooled engine 6 shown in FIG. 5, and the shroud 8 shown in FIG. The air cleaner case 9 for two wheels shown in FIG. 7 is used as the body cover 11 of the scooter 10 shown in FIG.
かかる構成の防音断熱構造部材３によれば、繊
維層のガラス繊維の断熱作用によつて断熱性が格
段に優れ、硬質材層２の材料を選定することによ
り、耐熱性を向上できる。より耐熱性が必要の場
合には、硬質材層を低温側、繊維層を高温側に置
く使用方法を採れば良い。また、騒音側に繊維層
を置くことで、ガラス繊維による吸音作用及び硬
質材層による透過音遮断作用によつて防音効果も
得られ、又鉄板等に比べ固有振動数が低く共振し
にくいので、音、振動の対策に抜群の効果を発揮
する。なお、繊維層の吸音能力は、層の厚さ及び
密度を変えることによつてコントロールできる。 According to the soundproof and heat insulating structural member 3 having such a configuration, the heat insulation properties are extremely excellent due to the heat insulation effect of the glass fibers in the fiber layer, and the heat resistance can be improved by selecting the material for the hard material layer 2. If higher heat resistance is required, the hard material layer may be placed on the low temperature side and the fibrous layer placed on the high temperature side. In addition, by placing a fiber layer on the noise side, a soundproofing effect can be obtained due to the sound absorption effect of the glass fiber and the transmitted sound blocking effect of the hard material layer.In addition, the natural frequency is lower than that of iron plates, etc., making it difficult to resonate. It is extremely effective in countering noise and vibration. Note that the sound absorption ability of the fiber layer can be controlled by changing the thickness and density of the layer.
また、防音断熱構造部材３の原材料が安くかつ
成形が容易であるので。鉄板プレス或いは樹脂成
形によるものに較べ、安く作ることができ、更に
は樹脂成形品に較べ繊維強化の効果（いわゆる
FRP）が得られるので、剛性及び引張強度が向
上し、強度部品として用いることも可能である。
また更に、硬質材として樹脂を用いると、樹脂の
塗装或いは樹脂自体への着色が可能であり、外観
商品性部品としての利用も可能である。 Furthermore, the raw materials for the soundproof and heat insulating structural member 3 are cheap and easy to mold. It can be manufactured more cheaply than those made by iron plate pressing or resin molding, and it also has the effect of fiber reinforcement (so-called) compared to resin molded products.
FRP) has improved rigidity and tensile strength, and can be used as strong parts.
Furthermore, when resin is used as the hard material, it is possible to paint the resin or color the resin itself, and it is also possible to use it as a commercially available part.
なお、第２図に示すように、繊維層及び硬質材
層からなる積層ユニツトを例えば２個（３個以上
であつても良い）積層することによつて、防振、
防音及び断熱効果をより向上できることになる。 As shown in FIG. 2, vibration isolation and
This means that the soundproofing and heat insulation effects can be further improved.
第３図には本発明の他の実施例が示されてお
り、本実施例においては、第１図に示す防音断熱
構造に加え、成型繊維材１の他方の表面（内表
面）にアルミシート等の金属シート４が貼着され
た構成となつている。この構成によれば、繊維層
の繊維の飛散を防止でき初期性能を長期に亘つて
維持できると共に、耐熱性、断熱性をより向上で
きることになる。 FIG. 3 shows another embodiment of the present invention. In this embodiment, in addition to the soundproof and heat-insulating structure shown in FIG. It has a structure in which a metal sheet 4 such as the above is attached. According to this configuration, scattering of the fibers of the fiber layer can be prevented, initial performance can be maintained over a long period of time, and heat resistance and heat insulation properties can be further improved.
第４図には本発明の更に他の実施例が示されて
おり、本実施例においては、第１図に示す防音断
熱構造に加え、成型繊維材１の他方の表面（内表
面）に、硬質材層２と同様の方法によつて硬質材
層５が形成された構成となつている。この構成に
よれば、上記実施例と同様に繊維層の繊維の飛散
を防止でき初期性能を長期に亘つて維持できると
共に、防音性をより向上できることになる。 FIG. 4 shows still another embodiment of the present invention. In this embodiment, in addition to the soundproof and heat-insulating structure shown in FIG. 1, the other surface (inner surface) of the molded fiber material 1 has The hard material layer 5 is formed by the same method as the hard material layer 2. According to this configuration, the scattering of the fibers of the fiber layer can be prevented as in the above embodiment, the initial performance can be maintained over a long period of time, and the soundproofing properties can be further improved.
また、上記２つの実施例においては、繊維層を
サンドイツチしているので、固有振動数が低くか
つ減衰度が良いため、外板として用いた場合に、
外板が共鳴しにくく、優れた防振効果が得られ
る。 In addition, in the above two examples, since the fiber layer is sandwiched, the natural frequency is low and the damping degree is good, so when used as an outer panel,
The outer panel is less likely to resonate, providing excellent vibration-proofing effects.
なお、本発明は、車輌に搭載される装置の外板
への適用に限定されるものではなく、第８図に示
された発電機１２のカバー１３や、第９図に示さ
れた温風ヒーター１４のボデイカバー１５等にも
適用され得る。 Note that the present invention is not limited to application to the outer panel of a device mounted on a vehicle, but is applied to the cover 13 of the generator 12 shown in FIG. It can also be applied to the body cover 15 of the heater 14, etc.
以上説明したように、本発明によれば、ガラス
長繊維、有機の長繊維及び無機の長繊維の少なく
とも一つを綿状に混合しかつマツト状に成型され
た繊維層の一方の表面に加圧焼成にて一体形成さ
れた硬質樹脂層を設けたので、両層を貼り合わせ
るような工数を必要とせず、製造工程の簡略化が
図れると共に、一体形成であることから両者の結
合力力を十分確保でき剥れ等が生じにくく、ま
た、硬質樹脂層自体が十分な剛性を有するため、
別個の補強部材等による補強を行う必要がなく、
構造部材として軽量化を図ることができる。さら
に、構成簡単にして防振、防音及び断熱性に優れ
た防音断熱構造部材が得られる。また、前記防音
断熱構造部材に加え、繊維層の他方の表面に金属
箔若しくは硬質材層を設けたので、繊維の飛散を
防止でき初期性能を長期に亘つて維持できると共
に、断熱性若しくは防音性をより向上できること
になる。 As explained above, according to the present invention, at least one of glass long fibers, organic long fibers, and inorganic long fibers is mixed into a cotton-like mixture and added to one surface of a fiber layer formed into a mat shape. Since the hard resin layer is integrally formed by pressure firing, there is no need for man-hours to bond the two layers together, which simplifies the manufacturing process. Since the hard resin layer itself has sufficient rigidity, it is hard to cause peeling etc.
There is no need for reinforcement with separate reinforcing members, etc.
As a structural member, it can be made lighter. Furthermore, a soundproof and heat insulating structural member having a simple structure and excellent vibration-proofing, soundproofing and heat-insulating properties can be obtained. In addition to the soundproofing and heat insulating structural member, a metal foil or hard material layer is provided on the other surface of the fiber layer, which prevents the fibers from scattering and maintains the initial performance over a long period of time. This will allow you to further improve your performance.
第１図は本発明の一実施例を示す断面図、第２
図は第１図の変形例を示す断面図、第３図は本発
明の他の実施例を示す断面図、第４図は本発明の
更に他の実施例を示す断面図、第５図ないし第９
図は本発明が適用され得る各種装置の斜視図であ
る。
主要部分の符号の説明、１……成型繊維材、
２，５……硬質材層、４……金属シート。
FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The drawings are a sectional view showing a modification of Fig. 1, Fig. 3 is a sectional view showing another embodiment of the present invention, Fig. 4 is a sectional view showing still another embodiment of the invention, and Figs. 9th
The figures are perspective views of various devices to which the present invention can be applied. Explanation of symbols of main parts, 1... Molded fiber material,
2, 5...Hard material layer, 4...Metal sheet.
Claims (1)
維及び無機の長繊維の少なくとも一つからなる繊
維層と、前記繊維層の一方の表面に層状に加圧焼
成にて一体形成された硬質樹脂層とからなること
を特徴とする防音断熱構造部材。 ２ 前記繊維層及び硬質樹脂層からなる積層ユニ
ツトが複数個積層されたことを特徴とする特許請
求の範囲第１項記載の防音断熱構造部材。 ３ 綿状に混合されたガラス長繊維、有機の長繊
維及び無機の長繊維の少なくとも一つからなる繊
維層と、前記繊維層の一方の表面に層状に加圧焼
成にて一体形成された硬質樹脂層と、前記繊維層
の他方の表面に添着された金属箔とからなること
を特徴とする防音断熱構造部材。 ４ 綿状に混合されたガラス長繊維、有機の長繊
維及び無機の長繊維の少なくとも一つからなる繊
維層と、前記繊維層の一方の表面に層状に加圧焼
成にて一体形成された第１の硬質樹脂層と、前記
繊維層の他方の表面に層状に加圧燃焼にて一体形
成された第２の硬質樹脂層とからなることを特徴
とする防音断熱構造部材。[Scope of Claims] 1. A fiber layer consisting of at least one of glass long fibers, organic long fibers, and inorganic long fibers mixed in the form of fluff, and a layer formed on one surface of the fiber layer by pressure firing. A soundproof and heat insulating structural member characterized by comprising a hard resin layer integrally formed with a hard resin layer. 2. The soundproof and heat insulating structural member according to claim 1, characterized in that a plurality of laminated units each comprising the fiber layer and the hard resin layer are laminated. 3. A fibrous layer consisting of at least one of glass long fibers, organic long fibers, and inorganic long fibers mixed in the form of fluff, and a hard layer integrally formed on one surface of the fibrous layer by pressure firing. A soundproof and heat insulating structural member comprising a resin layer and a metal foil attached to the other surface of the fiber layer. 4. A fibrous layer consisting of at least one of glass long fibers, organic long fibers, and inorganic long fibers mixed in a cotton-like manner, and a layer formed integrally on one surface of the fibrous layer by pressure firing. A soundproof and heat insulating structural member comprising one hard resin layer and a second hard resin layer integrally formed in a layered manner on the other surface of the fiber layer by pressurized combustion.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075464A JPS59200297A (en) | 1983-04-28 | 1983-04-28 | Sound-proof heat insulation structural member |
| GB08408136A GB2139950B (en) | 1983-04-28 | 1984-03-29 | Composite sound and heat insulating board |
| US06/777,271 US4619344A (en) | 1983-04-28 | 1985-09-18 | Composite sound and heat insulating board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075464A JPS59200297A (en) | 1983-04-28 | 1983-04-28 | Sound-proof heat insulation structural member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59200297A JPS59200297A (en) | 1984-11-13 |
| JPH05718B2 true JPH05718B2 (en) | 1993-01-06 |
Family
ID=13577051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58075464A Granted JPS59200297A (en) | 1983-04-28 | 1983-04-28 | Sound-proof heat insulation structural member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59200297A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6438797A (en) * | 1987-08-05 | 1989-02-09 | Honda Motor Co Ltd | Reinforced soundproof heat insulating member |
| JP2004528222A (en) | 2001-06-01 | 2004-09-16 | オウェンス コーニング | Bonnet liner, dashboard liner, firewall liner or engine cover liner |
| JP4803126B2 (en) * | 2007-01-24 | 2011-10-26 | ダイキン工業株式会社 | Soundproof material for compressor |
| JP5893944B2 (en) * | 2012-02-10 | 2016-03-23 | 株式会社クラレ | Damping material, damping method and damping material control method |
| JP2020075367A (en) * | 2018-11-05 | 2020-05-21 | 旭ファイバーグラス株式会社 | Glass fiber structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4891643A (en) * | 1972-01-20 | 1973-11-28 | ||
| JPS4952413A (en) * | 1972-09-22 | 1974-05-21 | ||
| JPS5610446A (en) * | 1979-07-09 | 1981-02-02 | Fujiyoshi Seisakusho Kk | Sound absorbing sound insulating body having heat insulating property and its manufacture |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS562722Y2 (en) * | 1976-04-27 | 1981-01-22 |
-
1983
- 1983-04-28 JP JP58075464A patent/JPS59200297A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4891643A (en) * | 1972-01-20 | 1973-11-28 | ||
| JPS4952413A (en) * | 1972-09-22 | 1974-05-21 | ||
| JPS5610446A (en) * | 1979-07-09 | 1981-02-02 | Fujiyoshi Seisakusho Kk | Sound absorbing sound insulating body having heat insulating property and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59200297A (en) | 1984-11-13 |
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