JPH0444899B2 - - Google Patents
Info
- Publication number
- JPH0444899B2 JPH0444899B2 JP61288887A JP28888786A JPH0444899B2 JP H0444899 B2 JPH0444899 B2 JP H0444899B2 JP 61288887 A JP61288887 A JP 61288887A JP 28888786 A JP28888786 A JP 28888786A JP H0444899 B2 JPH0444899 B2 JP H0444899B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- weight
- vibration damping
- parts
- thickness
- 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
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
- Vibration Prevention Devices (AREA)
Description
（産業上の利用分野）
本発明は、鋼板から成る車両部品に融着、発泡
させて制振性を向上させる車両用制振シートに関
する。
（従来の技術）
従来から、自動車等の車両において鋼板から成
る車両部品に制振性を与えるものの１つとして、
鋼板にアスフアルト等の歴青物質と、炭酸カルシ
ウム等の無機質充填剤とから成る厚さ２ないし５
mmの制振シートを接着したものは知られている。
このような制振シートは、制振効果を高めるのに
はシートの厚さを厚くする必要があり、そのため
シートが重くなると共に、車両部品の重量が増加
するという問題がある。
そこで、制振シートの軽量化を計るものとして
特開昭61−29533号公報に見られるように、歴青
物質および無機質充填剤を主成分として、厚み比
で1.1〜2.5倍の発泡倍率を有する発泡剤を混入し
てなる制振シートを、車両鋼板上に載置し、拘束
層を積層後加熱により制振シートを発泡、融着し
たものが知られている。しかしながらこのような
加熱により発泡した制振シートは使用時に例えば
エンジンの放熱等によつて車両鋼板が加温される
と共に、制振シートも加温されるので、温度上昇
に伴い制振シートが軟化し、発泡シート内のセル
強度が低下して所謂ヘタリを生じる。その結果制
振効果が低下し、特に制振シートに荷重が加えら
れたときは制振シートは圧縮されて制振効果は著
しく低下する問題がある。
（解決しようとする問題点）
本発明はかかる従来の問題を解消し、加温され
たとき軟化しヘタることがなく、また荷重が加え
られてもシート厚がほとんど変ることがなく、優
れた制振効果と耐圧強度とを有する車両用制振シ
ートを提供しようとするものである。
（問題点を解決するための手段）
本発明は前記問題点を解決するためになされた
ものであつて、歴青物質40〜60重量部と無機質充
填剤10〜55重量部を主成分として、これに熱硬化
性樹脂５〜15重量部と、発泡剤0.5〜３重量部と
を添加し、加熱処理を施して車両鋼板上に融着し
発泡して成る。
本発明は、加熱処理により車両鋼板上で融着し
発泡した制振シートが、使用時に車両鋼板と共に
加温されても軟化して所謂ヘタリを生じないこ
と、また荷重が加えられても容易に圧縮しないこ
と等について種々検討した結果、従来の歴青物質
と、無機質充填剤とを主成分とし、これに発泡剤
を添加して成るシートに、新たに熱硬化性樹脂を
加えたものが最適であることを知見し、従来の問
題点を解消したものである。
以下本発明の制振シートの好適配合について説
明する。この制振シートは、歴青物質と、熱可塑
性エラストマーまたは熱可塑性樹脂と、合成ゴム
と、石油樹脂と、無機質充填剤と、アスベストま
たは故紙と、発泡剤と、更に熱硬化性樹脂とから
成るものである。即ち歴青物質においてはその量
を鋼板に対しての密着性、保型性、ブロツキング
性から40ないし60重量部とした。
熱可塑性エラストマーまたは熱可塑性樹脂は制
振効果を高めるために添加するものであつて、そ
の量は１重量部以下では添加した効果が得られ
ず、10重量部を超えると制振効果のピークが高温
度側へ移行する傾向を有する。
合成ゴムはシート材作成のための各材料の混練
及びその後に行われる圧延等の加工作業性を高め
るために添加するものであつて、加工作業性、経
済上からその添加量は１ないし５重量部が良い。
石油樹脂は鋼板に対しての密着性を高めるもの
であつて、その量は１重量部以下では添加した効
果は得られず、５重量部を超えると加工作業性が
悪くなる。
無機質充填剤としてはアルフアルト等の歴青物
質から成る制振シート材の汎用の無機質充填剤を
用いることが出来るが、制振シートとしての制振
効果、硬さ、密着性を考慮すると、その添加量は
10ないし55重量部が良い。また無機質充填剤は汎
用のものを単独に用いてもよいし、或いは炭酸カ
ルシウムとマイカのように複種類を併用してもよ
い。
アスベストまたは故紙はシート材に加熱処理を
施して鋼板上に融着、発泡させる際、シート材が
軟化し変形することを防止するために添加するも
のであつて、その添加量は２重量部以下では加熱
処理時に軟化し変形し易く、10重量部を超えると
ビードへの追従性が低下する傾向を有する。
発泡剤としては歴青物質、無機質充填剤、樹脂
材等から成る制振シート材の汎用の発泡剤を用い
ることが出来、その添加量は0.5重量部以下では
発泡倍率が低く満足な発泡シートが得られず、３
重量部を超えると発泡シート内のセルが大きく形
成されるためセル強度が低下し、発泡シートの耐
圧強度が低下する傾向を有する。尚発泡倍率とし
ては1.5ないし2.5倍が好適である。
熱硬化性樹脂は加熱処理によつて硬化するため
発泡剤の作用により発泡し形成された発泡シート
内のセル強度を高めて発泡シートの耐圧強度を向
上させると共に、発泡シートが加温された際軟化
することを防止するために添加するものであつ
て、発泡シートの耐圧強度、耐熱性、制振効果上
からその添加量は５ないし15重量部が良い。
歴青物質と、熱可塑性エラストマーまたは熱可
塑性樹脂と、合成ゴムと、石油樹脂と、無機質充
填剤と、アスベストまたは故紙と、発泡剤と、熱
硬化性樹脂とについて夫々を前記範囲内で取捨選
択して混練、圧延し所定厚の未発泡シートとな
し、これを車両鋼板上に載置し加熱処理を施して
融着発泡させて制振シートを作成すれば、加温さ
れて高温になつても軟化しヘタることがないので
優れた制振効果を維持出来、また荷重が加えられ
てもシートの厚さがほとんど変らないため優れた
耐圧強度を有する制振シートが得られる。従つて
発泡した制振シートに人が乗つても体重で該シー
トが圧縮されることが極めて少なく、かつ制振効
果が高いので、例えば自動車等のフロアに使用す
ることが出来る。
（実施例）
次に本発明の実施例並びに比較例について説明
する。
実施例１，２，３，４，５と、比較例１，２と
の各制振シートの組成は表−１のとおりであり、
組成物の夫々について常法により混練圧延して厚
さ２mmの未発泡シートを得た。但し比較例２は発
泡剤は添加されていない。
(Industrial Application Field) The present invention relates to a vibration damping sheet for a vehicle that improves vibration damping properties by being fused and foamed to a vehicle component made of a steel plate. (Prior Art) Conventionally, as one of the things that give vibration damping properties to vehicle parts made of steel plates in vehicles such as automobiles,
A steel plate with a thickness of 2 to 5, consisting of a bituminous material such as asphalt and an inorganic filler such as calcium carbonate.
It is known that a damping sheet of mm is attached.
In order to enhance the damping effect of such a vibration damping sheet, it is necessary to increase the thickness of the sheet, which causes problems in that the sheet becomes heavier and the weight of vehicle parts increases. Therefore, as seen in Japanese Patent Application Laid-open No. 61-29533, in order to reduce the weight of a vibration damping sheet, a foaming material containing bituminous material and inorganic filler as the main components and having an expansion ratio of 1.1 to 2.5 times in terms of thickness ratio is proposed. It is known that a vibration damping sheet mixed with a foaming agent is placed on a vehicle steel plate, a restraining layer is laminated thereon, and then the vibration damping sheet is foamed and fused by heating. However, when a damping sheet foamed by such heating is used, the vehicle steel plate is heated by heat radiation from the engine, and the damping sheet is also heated, so the damping sheet becomes soft as the temperature rises. However, the cell strength within the foam sheet decreases, causing so-called sagging. As a result, the damping effect is reduced, and particularly when a load is applied to the damping sheet, the damping sheet is compressed and the damping effect is significantly reduced. (Problems to be Solved) The present invention solves these conventional problems, and provides an excellent sheet material that does not soften and deform when heated, and has almost no change in sheet thickness even when a load is applied. It is an object of the present invention to provide a vibration damping sheet for a vehicle that has a vibration damping effect and pressure resistance. (Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems. To this, 5 to 15 parts by weight of a thermosetting resin and 0.5 to 3 parts by weight of a foaming agent are added, followed by heat treatment to fuse and foam onto a vehicle steel plate. The present invention has the advantage that a vibration damping sheet that is fused and foamed on a vehicle steel plate through heat treatment does not soften and cause so-called sagging even when heated together with the vehicle steel plate during use, and that it does not easily sag even when a load is applied. As a result of various studies regarding non-compression, etc., we found that the best option was to add a new thermosetting resin to the conventional sheet made mainly of bituminous material and inorganic filler, with the addition of a foaming agent. This has solved the problems of the conventional method. The preferred formulation of the vibration damping sheet of the present invention will be explained below. This damping sheet is made of bituminous material, thermoplastic elastomer or thermoplastic resin, synthetic rubber, petroleum resin, inorganic filler, asbestos or waste paper, foaming agent, and thermosetting resin. It is something. That is, the amount of bituminous material was set at 40 to 60 parts by weight in view of adhesion to the steel plate, shape retention, and blocking properties. Thermoplastic elastomer or thermoplastic resin is added to enhance the damping effect. If the amount is less than 1 part by weight, the added effect will not be obtained, and if it exceeds 10 parts by weight, the damping effect will reach its peak. It has a tendency to shift to the high temperature side. Synthetic rubber is added to improve processing workability such as kneading of each material for sheet material production and subsequent rolling, and from the viewpoint of processing workability and economy, the amount added is 1 to 5 weight. The department is good. The petroleum resin increases adhesion to the steel plate, and if the amount is less than 1 part by weight, no effect will be obtained, and if it exceeds 5 parts by weight, processing workability will deteriorate. As the inorganic filler, a general-purpose inorganic filler for vibration damping sheet materials made of bituminous substances such as Alphalt can be used, but considering the damping effect, hardness, and adhesion of the vibration damping sheet, its addition is The amount is
10 to 55 parts by weight is good. Moreover, a general-purpose inorganic filler may be used alone, or two or more types of inorganic fillers, such as calcium carbonate and mica, may be used in combination. Asbestos or waste paper is added to prevent the sheet material from softening and deforming when it is heat-treated to fuse and foam onto the steel plate, and the amount added is 2 parts by weight or less. It tends to soften and deform during heat treatment, and if it exceeds 10 parts by weight, it tends to have poor bead followability. As the foaming agent, a general-purpose foaming agent for vibration damping sheet materials made of bituminous materials, inorganic fillers, resin materials, etc. can be used.If the amount added is less than 0.5 parts by weight, the foaming ratio will be low and a satisfactory foamed sheet will not be obtained. Not obtained, 3
If the amount exceeds 1 part by weight, the cells within the foam sheet will be formed to be large, resulting in a decrease in cell strength and a tendency for the compressive strength of the foam sheet to decrease. The expansion ratio is preferably 1.5 to 2.5 times. Thermosetting resins harden through heat treatment, so they are foamed by the action of a foaming agent, increasing the cell strength within the formed foam sheet and improving the pressure resistance of the foam sheet. It is added to prevent softening, and the amount added is preferably 5 to 15 parts by weight in view of the compressive strength, heat resistance, and vibration damping effect of the foam sheet. Bituminous substances, thermoplastic elastomers or thermoplastic resins, synthetic rubber, petroleum resins, inorganic fillers, asbestos or waste paper, blowing agents, and thermosetting resins are selected within the above ranges. This is then kneaded and rolled to form an unfoamed sheet of a predetermined thickness, which is then placed on a vehicle steel plate and heat-treated to fuse and foam it to create a vibration damping sheet. Since the material does not soften or deteriorate, it is possible to maintain an excellent vibration damping effect, and since the thickness of the sheet hardly changes even when a load is applied, a vibration damping sheet with excellent compressive strength can be obtained. Therefore, even if a person rides on a foamed vibration damping sheet, the sheet is very unlikely to be compressed by the weight of the person, and has a high vibration damping effect, so it can be used, for example, on the floor of an automobile. (Example) Next, Examples and Comparative Examples of the present invention will be described. The compositions of each damping sheet of Examples 1, 2, 3, 4, 5 and Comparative Examples 1 and 2 are as shown in Table-1,
Each of the compositions was kneaded and rolled in a conventional manner to obtain an unfoamed sheet with a thickness of 2 mm. However, in Comparative Example 2, no blowing agent was added.
【表】
また前記実施例１，２，３，４，５と、比較例
１，２の厚さ２mmの各未発泡シートの夫々を、厚
さ0.8mmの鋼板上に載置し、温度140℃で時間30分
間の加熱処理を施して鋼板上に融着せしめると共
に発泡させて厚さ４mmの発泡制振シートを得え、
20℃、40℃、60℃の各温度における損失係数ｄを
調べた結果は表−２のとおりである。但し比較例
２は発泡剤が添加されていないため発泡していな
い。[Table] In addition, each of the unfoamed sheets of Examples 1, 2, 3, 4, and 5 and Comparative Examples 1 and 2 with a thickness of 2 mm was placed on a steel plate with a thickness of 0.8 mm, and Heat treatment was performed at ℃ for 30 minutes to fuse it onto a steel plate and foam it to obtain a foamed vibration damping sheet with a thickness of 4 mm.
Table 2 shows the results of examining the loss coefficient d at each temperature of 20°C, 40°C, and 60°C. However, in Comparative Example 2, no foaming occurred because no foaming agent was added.
【表】
試験方法：損失係数ｄは共振法「騒音対策ハン
ドブツク（日本音響材料協会出版）第438頁」
に基き測定し、次式により求めた。
do＝f2−f1／fo
do：ｎ次の損失係数
fo：ｎ次の共振周波数
f1・f2：共振周波数の前後で振巾が共振点の
１／√２となる周波数（f1＜f2）
尚損失係数ｄが大きい程防振効果は高く、その
値が0.05以上あれば防振効果はあるとされてい
る。
次に前記実施例１と、比較例１とを夫々鋼板上
で発泡させた後、荷重を加えてシート厚の変化を
調べた結果は図のとおりである。
尚シート厚の厚み減少率（％）は次により求め
た。
厚み減少率％＝最初の厚み−荷重を加えた後の厚み／
最初の厚み×100
更に前記実施例１と同一配合から成る厚さ２mm
の未発泡シートを厚さ0.8mmの鋼板上に載置し、
更に未発泡シートの上に厚さ0.4mmから成る鋼板
製の拘束板を積層して加熱処理を施して未発泡シ
ートを鋼板と拘束板間で発泡させて厚さ2.6mm、
3.0mm、3.6mmとした厚さが異なる発泡制振シート
を得え、20℃、40℃、60℃の各温度における損失
係数ｄを調べた結果は表−３のとおりである。[Table] Test method: Loss coefficient d is the resonance method "Noise Countermeasures Handbook (published by Japan Acoustic Materials Association) p. 438"
It was measured based on , and calculated using the following formula. d o = f 2 - f 1 / f o d o : n-th loss coefficient f o : n-th resonant frequency f 1・f 2 : amplitude is 1/√2 of the resonance point before and after the resonance frequency Frequency (f 1 <f 2 ) It is said that the larger the loss coefficient d, the higher the vibration damping effect, and if the value is 0.05 or more, the vibration damping effect is achieved. Next, after each of Example 1 and Comparative Example 1 was foamed on a steel plate, a load was applied and changes in sheet thickness were investigated. The results are shown in the figure. The thickness reduction rate (%) of the sheet thickness was determined as follows. Thickness reduction rate % = Initial thickness - Thickness after applying load /
Initial thickness x 100 and a thickness of 2 mm made from the same composition as in Example 1 above.
Place the unfoamed sheet on a 0.8 mm thick steel plate,
Furthermore, a restraining plate made of steel plate with a thickness of 0.4 mm was laminated on the unfoamed sheet, and heat treatment was performed to foam the unfoamed sheet between the steel plate and the restraining plate to a thickness of 2.6 mm.
Foamed vibration damping sheets with different thicknesses of 3.0 mm and 3.6 mm were obtained, and the loss coefficient d at each temperature of 20°C, 40°C, and 60°C was investigated. The results are shown in Table 3.
【表】
表−２および図に示すように本発明の実施例
１，２，３，４，５の制振シートは、比較例１，
２の制振シートに比して加温されて高温になつて
も軟化しヘタることもなく優れた制振効果を有
し、特に制振シートに荷重が加えられてもシート
厚がほとんど変ることがないため優れた耐圧強度
を有することが確認された。また本発明の制振シ
ートの損失係数は拘束板を用いた場合の損失係数
（表−３）に比して低い値を示しているが、拘束
板を用いなくとも制振効果に実質上なんらの影響
を受けないことが確認された。
（発明の効果）
このように本発明によるときは、歴青物質40〜
60重量部と無機質充填剤10〜55重量部を主成分と
して、これに熱硬化性樹脂５〜15重量部と、発泡
剤0.5〜３重量部とを添加し、加熱処理を施して
車両鋼板上に融着し発泡して成る制振シートは、
熱硬化性樹脂は加熱処理によつて硬化するため、
発泡剤の作用により発泡し形成された発泡シート
内のセル強度を高めて、発泡シートの耐圧強度を
向上させると共に、加温された際軟化しヘタるこ
とがなく、また荷重が加えられてもシート厚がほ
とんど変ることがない。従つて加温時および負荷
時において優れた制振効果と耐圧強度とを備える
車両用制振シートを提供するの効果がある。[Table] As shown in Table 2 and the figure, the vibration damping sheets of Examples 1, 2, 3, 4, and 5 of the present invention are of Comparative Example 1,
Compared to the damping sheet No. 2, it does not soften or deteriorate even when heated to high temperatures, and has an excellent damping effect, and in particular, the sheet thickness hardly changes even when a load is applied to the damping sheet. It was confirmed that the material had excellent compressive strength. Furthermore, although the loss coefficient of the vibration damping sheet of the present invention is lower than the loss coefficient when using a restraint plate (Table 3), there is virtually no effect on the damping effect even without the use of a restraint plate. It has been confirmed that there is no effect on (Effect of the invention) As described above, according to the present invention, the bituminous substance 40~
The main components are 60 parts by weight and 10 to 55 parts by weight of an inorganic filler, to which are added 5 to 15 parts by weight of a thermosetting resin and 0.5 to 3 parts by weight of a foaming agent, and heat treated to form a material on a vehicle steel plate. The vibration damping sheet is made by fusing and foaming the
Thermosetting resins harden through heat treatment, so
The action of the foaming agent increases the cell strength within the foamed sheet, which improves the compressive strength of the foamed sheet, and also prevents it from softening and deforming when heated, and even when a load is applied. The sheet thickness hardly changes. Therefore, it is possible to provide a vibration damping sheet for a vehicle that has an excellent vibration damping effect and pressure resistance during heating and under load.
図面はシートに荷重を加えたときのシート厚の
減少率を示す図である。
The drawing shows the rate of decrease in sheet thickness when a load is applied to the sheet.
Claims (1)
重量部を主成分として、これに熱硬化性樹脂５〜
15重量部と、発泡剤0.5〜３重量部とを添加し、
加熱処理を施して車両鋼板上に融着し発泡して成
る車両用制振シート。1 40-60 parts by weight of bituminous material and 10-55 parts by weight of inorganic filler
5 to 5 parts by weight of thermosetting resin as the main component
Adding 15 parts by weight and 0.5 to 3 parts by weight of a blowing agent,
A vibration damping sheet for vehicles that is heat-treated, fused and foamed onto a vehicle steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28888786A JPS63141731A (en) | 1986-12-05 | 1986-12-05 | Vibration damping sheet for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28888786A JPS63141731A (en) | 1986-12-05 | 1986-12-05 | Vibration damping sheet for vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63141731A JPS63141731A (en) | 1988-06-14 |
| JPH0444899B2 true JPH0444899B2 (en) | 1992-07-23 |
Family
ID=17736058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28888786A Granted JPS63141731A (en) | 1986-12-05 | 1986-12-05 | Vibration damping sheet for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63141731A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2649631B2 (en) * | 1992-06-01 | 1997-09-03 | 日本特殊塗料 株式会社 | High foam damping sheet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328328A (en) * | 1976-08-28 | 1978-03-16 | Shaken Kk | System for taking pattern generating camera tube |
| JPS6028436A (en) * | 1983-07-27 | 1985-02-13 | Nippon Tokushu Toryo Kk | Vibration-damping sheet of expansion type and its preparation |
| JPS6123648A (en) * | 1984-07-11 | 1986-02-01 | Central Glass Co Ltd | Heat-resistant damping material |
| JPS6129533A (en) * | 1984-07-20 | 1986-02-10 | 日本特殊塗料株式会社 | Vibration-damping treatment method of car |
| JPS61163851A (en) * | 1985-01-17 | 1986-07-24 | 日本特殊塗料株式会社 | Vibration-damping treating method of car |
-
1986
- 1986-12-05 JP JP28888786A patent/JPS63141731A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63141731A (en) | 1988-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |