JPH0584865A - Composite damping steel plate excellent in spot weldability - Google Patents
Composite damping steel plate excellent in spot weldabilityInfo
- Publication number
- JPH0584865A JPH0584865A JP3273589A JP27358991A JPH0584865A JP H0584865 A JPH0584865 A JP H0584865A JP 3273589 A JP3273589 A JP 3273589A JP 27358991 A JP27358991 A JP 27358991A JP H0584865 A JPH0584865 A JP H0584865A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- damping steel
- steel plate
- rubber layer
- rubber
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車、家電製品等に
使用される制振鋼板に関するものであり、とくにスポッ
ト溶接性にすぐれた複合制振鋼板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping steel plate used for automobiles, home electric appliances and the like, and more particularly to a composite vibration damping steel plate having excellent spot weldability.
【０００２】[0002]
【従来の技術】複合制振鋼板とは、複数の鋼板の間に振
動を熱に変える性質の樹脂層、またはゴム層を介在させ
た構造を持っており、実際の装置、製品等には、電気溶
接、とくにスポット溶接により組みこまれる。樹脂やゴ
ムは一般的には電気絶縁性であるので、前記のように溶
接を可能にするため各種の技術が開発されている。まず
樹脂層またはゴム層に導電性を賦与するための各種の導
性性物質を含ませる技術が開発されている。例えば特開
昭５０−７９９２０号等の公報には金属粉を含ませたも
の、特開昭６１−４１５４０号公報にはリン化鉄を含ま
せた樹脂層に関するものが開示されている。2. Description of the Related Art A composite damping steel plate has a structure in which a resin layer or a rubber layer having a property of converting vibration into heat is interposed between a plurality of steel plates. It is assembled by electric welding, especially spot welding. Since resins and rubbers are generally electrically insulating, various techniques have been developed to enable welding as described above. First, a technique has been developed in which various conductive substances for imparting conductivity to a resin layer or a rubber layer are contained. For example, Japanese Patent Application Laid-Open No. 50-79920 and the like disclose those containing metal powder, and Japanese Patent Application Laid-Open No. 61-41540 discloses those relating to a resin layer containing iron phosphide.
【０００３】また炭素質を含ませ軽量化したものとし
て、例えば特開昭５７−１６３５５９号公報には、ポリ
アクリルニトリル系、ピッチ系等の炭素繊維を、特開昭
５７−１６３５６０号公報にはカーボンブラックを、ま
た特開昭５８−１６０１４１号公報には黒鉛粉を含ませ
た樹脂層に関するものが開示されている。さらに特開昭
６１−２０６７２号公報には樹脂層を有する複合型制振
鋼板の改良スポット溶接方法が開示されている。以上の
如く複合型制振鋼板のスポット溶接性の向上には、制振
鋼板の樹脂又はゴム層自身の導電性の向上を主とするも
のと、スポット溶接法そのものの改良によるものとに大
別される。[0003] Further, as a material containing carbonaceous material to reduce the weight, for example, Japanese Unexamined Patent Publication No. 57-163559 discloses polyacrylonitrile-based, pitch-based carbon fibers and Japanese Unexamined Patent Publication No. 57-163560. Japanese Patent Application Laid-Open No. 58-160141 discloses a resin layer containing carbon black and graphite powder. Further, Japanese Patent Laid-Open No. 61-20672 discloses an improved spot welding method for a composite type vibration damping steel plate having a resin layer. As described above, the improvement of the spot weldability of the composite type vibration-damping steel plate is roughly classified into the one that mainly improves the conductivity of the resin or the rubber layer of the vibration-damping steel plate and the improvement of the spot welding method itself. To be done.
【０００４】前者において導電性物質として前述のよう
に金属粉を含ませた場合、金属粉自身は内部損失（振動
を熱に変換する能力の目安であり例えばｔａｎδで示さ
れる）を殆どもっていない。したがって金属粉を樹脂
層、またはゴム層に含ませた場合、それらの層の電気伝
導性は増加するが、制振性能はむしろ低下するという現
象を生ずる。したがって金属粉を添加する場合は、これ
らを勘案して実用的に最適値が得られるようにする必要
がある。一方炭素質添加の場合は金属粉添加のような問
題は生じない。炭素質としては前述のように炭素繊維、
カーボンブラック等の添加技術が開発されている。In the former case, when the metal powder is included as a conductive substance as described above, the metal powder itself has almost no internal loss (a measure of the ability to convert vibration into heat, which is represented by tan δ, for example). Therefore, when the metal powder is contained in the resin layer or the rubber layer, the electric conductivity of those layers increases, but the vibration damping performance rather deteriorates. Therefore, in the case of adding the metal powder, it is necessary to take these factors into consideration so that the optimum value can be practically obtained. On the other hand, in the case of adding carbonaceous matter, the problem of adding metal powder does not occur. As the carbonaceous material, carbon fiber,
Technology for adding carbon black has been developed.
【０００５】炭素繊維は従来は主としてポリアクリロニ
トリル、セルローズ等を熱処理して製造されており、特
開昭５７−１６３５５９においては、これらの炭素繊維
を０．１〜３０ｍｍ程度の長さに細かく切断したものが
樹脂中に１０〜７０重量％混合されている。Conventionally, carbon fibers have been manufactured mainly by heat-treating polyacrylonitrile, cellulose and the like. In JP-A-57-163559, these carbon fibers are finely cut into a length of about 0.1 to 30 mm. 10 to 70% by weight is mixed in the resin.
【０００６】[0006]
【発明が解決しようとする課題】近年気相法熱分解によ
り、従来の方法で製造された炭素繊維に比しはるかに微
少な炭素繊維が大量かつ安定的な生産が可能となった。
本発明者らはこの気相法により製造された微細な炭素繊
維に着目し、これらを利用すれば、極めてすぐれた性能
の複合型制振鋼板を開発しうることを確信し、研究の結
果本発明を完成した。In recent years, vapor-phase pyrolysis has made it possible to stably produce a large amount of carbon fibers, which are much smaller than carbon fibers produced by conventional methods.
The inventors of the present invention focused on the fine carbon fibers produced by the vapor phase method, and were convinced that a composite type vibration damping steel sheet with extremely excellent performance could be developed by using these carbon fibers. Completed the invention.
【０００７】[0007]
【課題を解決するための手段】すなわち本発明は、複数
の鋼板と該鋼板間にはさまれた樹脂層またはゴム層より
なる複合型制振鋼板において、樹脂層またはゴム層には
直径が０．０１〜２μｍ、長さが１〜１０００μｍの炭
素繊維が含まれていることを特徴とする複合型制振鋼板
に関する。このような微細な炭素繊維は気相法により容
易に製造され、適当の曲りと分枝をもっている。そして
そのカサ密度は０．００５〜０．１ｇ／ｃｍ3 と非常に
小さく軽量である。このように微細な炭素繊維は樹脂
層、ゴム層において次のような微細構造を形成してい
る。That is, the present invention provides a composite type vibration damping steel sheet comprising a plurality of steel sheets and a resin layer or a rubber layer sandwiched between the steel sheets, wherein the resin layer or the rubber layer has a diameter of 0. The present invention relates to a composite type vibration damping steel plate characterized by containing carbon fibers having a length of 0.01 to 2 μm and a length of 1 to 1000 μm. Such fine carbon fibers are easily manufactured by the vapor phase method and have proper bending and branching. The bulk density is 0.005-0.1 g / cm 3, which is very small and lightweight. Such fine carbon fibers form the following fine structure in the resin layer and the rubber layer.
【０００８】すなわち前述の実質的には気相法で製造さ
れる微細な炭素繊維は層内で互いにからみあって複雑な
網目を形成している。溶接の場合、電気はこの網目を流
れる。又層に圧力が加えられると、炭素繊維の網目は一
層密になるので電気抵抗は著しく低下するという感圧特
性をもっている。さらに層自体が変形した場合、網目構
造は変化するが、網目そのものが破壊されることはな
く、導電性には影響しない。むしろこのような場合、網
目のずれの発生により変位は熱にかわり、制振性は向上
する。That is, the above-mentioned substantially fine carbon fibers produced by the vapor phase method are entangled with each other in a layer to form a complicated network. In the case of welding, electricity flows through this mesh. Further, when pressure is applied to the layer, the mesh of the carbon fibers becomes denser, so that the electric resistance is remarkably reduced, which is a pressure-sensitive property. Further, when the layer itself is deformed, the mesh structure is changed, but the mesh itself is not destroyed and the conductivity is not affected. Rather, in such a case, the displacement is replaced by heat due to the occurrence of the mesh shift, and the vibration damping property is improved.
【０００９】炭素繊維はその製造における熱処理が、８
００〜２０００℃の低温熱処理のもの、２０００℃をこ
える高温熱処理の両方あるが、本発明の複合型制振鋼板
においてはいずれも用いることができる。微細な炭素繊
維と樹脂またはゴムとの混合は、樹脂またはゴム１００
重量部に対して、炭素繊維１０〜２００重量部である。
炭素繊維が１０重量部未満の場合は、添加の効果は少な
く、また２００重量部をこえると、全体の中のゴムまた
は樹脂の配合割合が低下し、制振効果が減少し、さらに
樹脂、またはゴム層の強度も低下する。The heat treatment in the production of carbon fiber is 8
There are both low temperature heat treatment of 00 to 2000 ° C. and high temperature heat treatment of more than 2000 ° C., but any of them can be used in the composite vibration-damping steel sheet of the present invention. Mixing of fine carbon fibers with resin or rubber should be done with resin or rubber 100
It is 10 to 200 parts by weight of carbon fiber with respect to parts by weight.
When the amount of carbon fiber is less than 10 parts by weight, the effect of addition is small, and when it exceeds 200 parts by weight, the compounding ratio of rubber or resin in the whole is decreased, the vibration damping effect is decreased, and further, resin, or The strength of the rubber layer also decreases.
【００１０】そして実用的には、樹脂又はゴム１００重
量部に対して１５〜１００重量部の範囲が好ましい。炭
素繊維と樹脂またはゴムとの混練は、通常の混練装置に
より行うことができる。フィルム状への成型はＴダイ押
出等で行うことができる。また鋼板との積層はホットプ
レス等の常法の手段で実施できる。Practically, the range of 15 to 100 parts by weight is preferable to 100 parts by weight of resin or rubber. The kneading of the carbon fiber and the resin or rubber can be performed by a usual kneading device. Molding into a film can be performed by T-die extrusion or the like. The lamination with the steel plate can be carried out by a conventional method such as hot pressing.
【００１１】本発明の樹脂層を形成する樹脂としては、
従来の複合制振型鋼板に用いられる樹脂がすべて用いら
れる。例えばポリエチレン、ポリプロピレン、ポリスチ
レン、ナイロン等である。またゴム層を形成するゴムと
してはブタジエンゴム、ウレタンゴム等を例示できる。As the resin forming the resin layer of the present invention,
All the resins used for conventional composite vibration control type steel sheets are used. For example, polyethylene, polypropylene, polystyrene, nylon and the like. Examples of the rubber forming the rubber layer include butadiene rubber and urethane rubber.
【００１２】[0012]
【作用】本発明における微細な、実質的には気相法で製
造される炭素繊維は、従来の炭素繊維に比し、はるかに
微小であり、又は適当な曲りと分岐をもっている。この
ため樹脂層、ゴム層中で密にからみあって存在してお
り、樹脂層、ゴム層の導電性を向上させ、かつ制振効果
も維持している。即ち本発明の複合型制振鋼板はすぐれ
たスポット溶接性をも併せもった材料である。The fine, substantially carbon fiber produced by the vapor phase method according to the present invention is much finer than the conventional carbon fibers, or has appropriate bending and branching. Therefore, the resin layer and the rubber layer are intimately entangled with each other, improving the conductivity of the resin layer and the rubber layer and maintaining the vibration damping effect. That is, the composite vibration-damping steel sheet of the present invention is a material that also has excellent spot weldability.
【００１３】次に実験例、実施例、比較例により、本発
明を説明する。 実験例１ ゴムに３０重量％の平均直径０．２μｍの、平均長さ１
０μｍの気相法炭素繊維（熱処理温度、２４００℃）を
添加その内部損失を測定した。ｔａｎδは０．３〜０．
４であった。 実験例２ 気相法炭素繊維に変えてオイルファーネス系カーボンブ
ラック（平均粒径０．０３μｍ´）を用いた以外実験例
１と同様に処理して内部損失を測定した。ｔａｎδ０．
１〜０．２であった。即ち制振性能はカーボンブラック
添加の場合より、気相法炭素繊維使用の方が明らかにす
ぐれている。Next, the present invention will be described with reference to experimental examples, examples and comparative examples. Experimental Example 1 30% by weight of rubber having an average diameter of 0.2 μm and an average length of 1
0 μm of vapor grown carbon fiber (heat treatment temperature, 2400 ° C.) was added and its internal loss was measured. tan δ is 0.3 to 0.
It was 4. Experimental Example 2 The internal loss was measured in the same manner as in Experimental Example 1 except that oil furnace carbon black (average particle size 0.03 μm ′) was used instead of the vapor grown carbon fiber. tan δ0.
It was 1 to 0.2. That is, the damping performance is clearly better when the vapor grown carbon fiber is used than when carbon black is added.
【００１４】実施例１〜６ 長さ１８００ｍｍ、巾９００ｍｍ、厚さ１ｍｍの鋼板２
枚の間に、Ｔダイ押出しで作成された厚さ０．０８ｍｍ
の樹脂層、またはゴム層をホットプレスにより圧接し、
長さ１００ｍｍ、巾２０ｍｍの試験片を切りだした。樹
脂層及びゴム層の組成を変化させた各種の試験片を作製
し、それぞれの試験片について、スポット溶接性、内部
損失（ｔａｎα）、剪断強度を測定した。スポット溶接
は電極径５ｍｍφ、加圧力３００Ｋｇｆ、電流１０Ｋ
Ａ、０．３ｓｅｃで行った。樹脂またはゴム層の組成、
測定効果を、表１に示す。Examples 1 to 6 Steel plate 2 having a length of 1800 mm, a width of 900 mm and a thickness of 1 mm
0.08mm thickness created by T-die extrusion between sheets
The resin layer or rubber layer of is pressed by hot pressing,
A test piece having a length of 100 mm and a width of 20 mm was cut out. Various test pieces having different compositions of the resin layer and the rubber layer were prepared, and spot weldability, internal loss (tan α), and shear strength were measured for each test piece. For spot welding, electrode diameter is 5mmφ, pressure is 300Kgf, current is 10K.
A, 0.3 sec. Composition of resin or rubber layer,
The measurement effects are shown in Table 1.
【表１】 [Table 1]
【００１５】比較例１〜６ 樹脂層、ゴム層の組成を本発明外とした以外、実施例と
同様に試験片を作成し、実施例と同様に各種の測定を行
った。試験片の組成、測定結果を表２に示す。Comparative Examples 1 to 6 Test pieces were prepared in the same manner as in the examples except that the compositions of the resin layer and the rubber layer were outside the scope of the present invention, and various measurements were performed in the same manner as in the examples. Table 2 shows the composition of the test pieces and the measurement results.
【表２】 [Table 2]
【００１６】[0016]
【発明の効果】実施例に示される微細な炭素繊維を含む
樹脂層、ゴム層を有する制振鋼板は電導性、制振性のい
ずれの点においても比較例に示される樹脂層まはゴム層
に比しスポット溶接に適した性質を有する。The vibration-damping steel sheet having the resin layer containing the fine carbon fibers and the rubber layer shown in the examples is the resin layer or the rubber layer shown in the comparative example in terms of both electric conductivity and vibration damping property. It has properties suitable for spot welding in comparison with.
Claims (3)
層またはゴム層よりなる複合型制振鋼板において、 樹脂層またはゴム層には直径が０．０１〜２μｍ、長さ
が１〜１０００μｍの炭素繊維が含まれていることを特
徴とする複合型制振鋼板。1. A composite vibration damping steel sheet comprising a plurality of steel sheets and a resin layer or a rubber layer sandwiched between the steel sheets, wherein the resin layer or the rubber layer has a diameter of 0.01 to 2 μm and a length of 1 A composite vibration-damping steel sheet containing carbon fibers of up to 1000 μm.
る請求項１の複合型制振鋼板。2. The composite vibration-damping steel sheet according to claim 1, wherein the carbon fiber is produced by a vapor phase method.
に対して１０〜２００重量部含まれている請求項１の複
合型制振鋼板。3. The composite vibration-damping steel sheet according to claim 1, wherein the carbon fiber is contained in an amount of 10 to 200 parts by weight based on 100 parts by weight of the resin or rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3273589A JPH0584865A (en) | 1991-09-26 | 1991-09-26 | Composite damping steel plate excellent in spot weldability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3273589A JPH0584865A (en) | 1991-09-26 | 1991-09-26 | Composite damping steel plate excellent in spot weldability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0584865A true JPH0584865A (en) | 1993-04-06 |
Family
ID=17529899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3273589A Pending JPH0584865A (en) | 1991-09-26 | 1991-09-26 | Composite damping steel plate excellent in spot weldability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0584865A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007063426A (en) * | 2005-08-31 | 2007-03-15 | Bridgestone Corp | Highly damping rubber composition |
| WO2010004634A1 (en) * | 2008-07-10 | 2010-01-14 | 日信工業株式会社 | Carbon nanofiber, process for producing the same, and carbon fiber composite material |
| US8329293B2 (en) | 2006-04-28 | 2012-12-11 | Nissin Kogyo Co., Ltd. | Carbon fiber composite material |
| US9000085B2 (en) | 2006-04-28 | 2015-04-07 | Nissin Kogyo Co., Ltd. | Carbon fiber composite resin material and method of producing the same |
-
1991
- 1991-09-26 JP JP3273589A patent/JPH0584865A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007063426A (en) * | 2005-08-31 | 2007-03-15 | Bridgestone Corp | Highly damping rubber composition |
| US8329293B2 (en) | 2006-04-28 | 2012-12-11 | Nissin Kogyo Co., Ltd. | Carbon fiber composite material |
| US9000085B2 (en) | 2006-04-28 | 2015-04-07 | Nissin Kogyo Co., Ltd. | Carbon fiber composite resin material and method of producing the same |
| WO2010004634A1 (en) * | 2008-07-10 | 2010-01-14 | 日信工業株式会社 | Carbon nanofiber, process for producing the same, and carbon fiber composite material |
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