JPH065109B2 - Gasket material - Google Patents
Gasket materialInfo
- Publication number
- JPH065109B2 JPH065109B2 JP61014387A JP1438786A JPH065109B2 JP H065109 B2 JPH065109 B2 JP H065109B2 JP 61014387 A JP61014387 A JP 61014387A JP 1438786 A JP1438786 A JP 1438786A JP H065109 B2 JPH065109 B2 JP H065109B2
- Authority
- JP
- Japan
- Prior art keywords
- expanded graphite
- adhesive
- graphite sheet
- metal foil
- gasket
- 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
- 239000000463 material Substances 0.000 title claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 37
- 229910002804 graphite Inorganic materials 0.000 claims description 37
- 239000010439 graphite Substances 0.000 claims description 37
- 239000000853 adhesive Substances 0.000 claims description 28
- 230000001070 adhesive effect Effects 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000011888 foil Substances 0.000 claims description 25
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920005749 polyurethane resin Polymers 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、たとえば石綿製ガスケットを用いることがで
きない場合や耐熱性を要求される場合、または低締付圧
の場合に好適に用いられるガスケット用素材に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a gasket preferably used when, for example, an asbestos gasket cannot be used, heat resistance is required, or a low tightening pressure is used. It relates to materials for use.
（従来の技術） 上記用途に適したガスケットとして膨張黒鉛シートから
なるガスケットがある。その膨張黒鉛シートとは、天然
黒鉛等を濃硫酸と濃硝酸、または濃硫酸と過酸化水素混
酸等によって酸処理したものを加熱することによって、
厚さ方向へ２００倍程膨張させ、芋虫状外観としたもの
をロール機等で均一にシート状にしたものである。この
膨張黒鉛シートを何枚も張り合わせてプレス加工するこ
とによって、第６図に示すようなガスケットを得ること
ができる。このガスケットの特性として、膨張黒鉛シー
トの張り合わせ方によって、厚さ方向Aにのみ弾力性を
有するものとか、半径方向Bにのみ弾力性を有するもの
とか、さらにおの方向A,Bにも弾力性を有するものを得
ることができる。また、このガスケットは、たとえば石
綿製ガスケットを用いることができない場合や耐熱性を
要求される場合、または低締付圧の場合に用いることに
よって優れた性能を示す。しかしながら、重大な欠点と
して強度の弱さがあり、圧力がかかった部分が簡単に剥
れやすく、取扱性の悪いものである。そこで２枚の膨張
黒鉛シートの間に金属薄板を挾み込み、その三者を粘着
性感圧接着剤で接着して補強することが考えられ、一部
に使用されているが、普及していない。これは、強度と
しては満足出来るものの、金属薄板を用いているので、
加工性が悪く、複雑な形状の製作には適さないこと、お
よび粘着性感圧接着剤の耐熱性が低くて、高温下では粘
性が低下し、接着界面が滑るという致命的な問題がある
からである。(Prior Art) As a gasket suitable for the above applications, there is a gasket made of an expanded graphite sheet. The expanded graphite sheet, by heating natural graphite or the like acid-treated with concentrated sulfuric acid and concentrated nitric acid, or concentrated sulfuric acid and hydrogen peroxide mixed acid,
It is expanded into the thickness direction by about 200 times and made into a caterpillar-like appearance, which is then uniformly made into a sheet by a roll machine or the like. A gasket as shown in FIG. 6 can be obtained by laminating several expanded graphite sheets and press-working them. The characteristics of this gasket are that it has elasticity only in the thickness direction A, or elasticity only in the radial direction B, depending on how the expanded graphite sheets are laminated, and also in both directions A and B. Can be obtained. Further, this gasket exhibits excellent performance when used, for example, when an asbestos gasket cannot be used, heat resistance is required, or when a low tightening pressure is used. However, there is a serious drawback that the strength is weak, the portion under pressure is easily peeled off, and the handleability is poor. Therefore, it is considered that a thin metal plate is sandwiched between two expansive graphite sheets, and the three of them are bonded and reinforced with an adhesive pressure-sensitive adhesive, which is partially used but not widely used. . Although this is satisfactory in strength, it uses a thin metal plate,
The workability is poor and it is not suitable for the production of complicated shapes.Because of the low heat resistance of the pressure-sensitive adhesive adhesive, there is a fatal problem that the viscosity decreases at high temperature and the adhesive interface slips. is there.
本発明は上記のような実情に鑑みなされたもので、十分
な強度を保ちつつ、ガスケットへの加工性に優れ、複雑
な形状の製作を可能とでき、しかも接着界面での滑りを
有効に防止でき、特に高温下での使用に対して有用なガ
スケット用素材を提供することを目的としている。The present invention has been made in view of the above-mentioned circumstances, and while maintaining sufficient strength, it has excellent workability to a gasket, enables production of complicated shapes, and effectively prevents slippage at the adhesive interface. The object of the present invention is to provide a gasket material that can be used and is particularly useful for use at high temperatures.
（問題点を解決するための手段） 上記目的を達成するために、本発明に係るガスケット用
素材は、膨張黒鉛シートと厚さが１０〜１００μｍの金
属箔とを重ね回せると共にその両者を膨張黒鉛シートへ
の浸透性のある熱硬化性接着剤により接着させたもので
ある。(Means for Solving the Problems) In order to achieve the above-mentioned object, the gasket material according to the present invention is capable of stacking an expanded graphite sheet and a metal foil having a thickness of 10 to 100 μm, and expanding both of them. The sheet is adhered with a thermosetting adhesive that has permeability to the sheet.
（作用） 本発明によれば、膨張黒鉛シートを金属箔によって補強
させることで、膨張黒鉛シートが引裂かれたりしないよ
うな十分な強度をもたせることが可能である。また、補
強のために使用する金属箔としては、その厚さが１０〜
１００μｍと非常に薄いものであるから、ガスケットへ
の成形時の圧力により膨張黒鉛シートが部分的に剥離す
るようなことがなくて、複雑形状の製作が可能となる。
また膨張黒鉛シートへの浸透性のある接着剤を使用する
ことにより、接着時に接着剤が膨張黒鉛シートの微小隙
間に髭状に浸透し、その浸透した接着剤の投錨効果によ
って金属箔と膨張黒鉛シートの接着が強固により、高温
下での使用時にも接着界面ですべりを生じることがな
く、安定した強度を保持することになる。(Operation) According to the present invention, by reinforcing the expanded graphite sheet with the metal foil, it is possible to provide the expanded graphite sheet with sufficient strength so as not to be torn. The thickness of the metal foil used for reinforcement is 10
Since the thickness is 100 μm, which is very thin, the expanded graphite sheet is not partially peeled off due to the pressure applied to the gasket, and a complicated shape can be manufactured.
In addition, by using an adhesive that is permeable to the expanded graphite sheet, the adhesive penetrates into the minute gaps of the expanded graphite sheet in a whisker-like shape at the time of adhesion, and the anchor effect of the penetrated adhesive causes the anchoring effect of the metal foil and expanded graphite. Due to the strong adhesion of the sheet, even when used at high temperature, no slippage occurs at the adhesive interface and stable strength is maintained.
（実施例） 以下、本発明の一実施例を第１図及び第２図に基づいて
説明する。即ち、この実施例のガスケット用素材は、一
対の膨張黒鉛シート１の間に多数の孔２を形成した金属
箔３を挾み込み、その三者1,3,1を膨張黒鉛シート１へ
の浸透性のある熱硬化性接着剤４で接着させたものであ
る。この場合、のそ接着剤は第１図に示す如く膨張黒鉛
シート１内に髭状に浸透し、これが硬化して接着界面で
のすべり（剪断力）に対し確実且つ十分に対抗する。
尚、上記膨張黒鉛シート１の厚みは0.2〜0.5mmである。
また上記金属箔３としては、銅、ステンレス鋼等が使用
される。そして、その金属箔３の厚さは10〜100μ、好
ましくは20〜50μである。10μ以下であると補強効果が
生じないし、100μ以上では打ち抜きにくくなって、ガ
スケット成形の加圧力により膨張黒鉛シー１が部分的に
剥れるもそれがある。孔２の直径は0.5〜1mmで、規則的
な配列をもってエッチングないし機械加工により穿孔す
る。開孔率は10〜80%、好ましくは30〜50%である。10%
以下では膨張黒鉛１どうしを接着剤４で直接、接着させ
る面積が小さくなりすぎるし、80%以上では補強効果が
生じない。接着剤４としては、フェノール系熱硬化性樹
脂（ケトン系溶剤で稀尺したもの）、一液型エポキシ樹
脂、未処理ポリウレタン系樹脂、耐熱処理ポリウレタン
系樹脂等が使用される。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. That is, in the gasket material of this embodiment, a metal foil 3 having a large number of holes 2 formed between a pair of expanded graphite sheets 1 is sandwiched, and the three members 1, 3, 1 are connected to the expanded graphite sheet 1. It is bonded with a thermosetting adhesive 4 having permeability. In this case, the adhesive glue penetrates into the expanded graphite sheet 1 in a whisker-like shape as shown in FIG. 1 and hardens to reliably and sufficiently counter slip (shear force) at the adhesive interface.
The expanded graphite sheet 1 has a thickness of 0.2 to 0.5 mm.
Further, as the metal foil 3, copper, stainless steel or the like is used. The thickness of the metal foil 3 is 10 to 100 μ, preferably 20 to 50 μ. If it is 10 μm or less, the reinforcing effect does not occur, and if it is 100 μm or more, it becomes difficult to punch it out, and the expanded graphite sheet 1 may partly peel off due to the pressing force of the gasket molding. The holes 2 have a diameter of 0.5 to 1 mm and are formed by etching or machining in a regular array. The porosity is 10 to 80%, preferably 30 to 50%. Ten%
In the following, the area where the expanded graphites 1 are directly bonded with the adhesive 4 becomes too small, and when it is 80% or more, the reinforcing effect does not occur. As the adhesive 4, a phenolic thermosetting resin (diluted with a ketone solvent), a one-pack type epoxy resin, an untreated polyurethane resin, a heat-resistant polyurethane resin, or the like is used.
上記ガスケット用素材を製造すには、例えば、金属箔３
の両面に接着剤４を塗布した後、２枚の膨張黒鉛シート
１を金属箔３の両面に重ね合わせる。これによって接着
剤４が膨張黒鉛シート１の微小な隙間内に浸透してい
く。次にそれらを加熱ロールで加圧することにより、一
体化させ、またこれと同時に接着剤４を熱硬化させる。
その後、室温または加熱下で、エージング（通常２４時
間）せせればよい。To manufacture the above gasket material, for example, metal foil 3
After applying the adhesive 4 on both sides of the sheet, the two expanded graphite sheets 1 are superposed on both sides of the metal foil 3. As a result, the adhesive 4 permeates into the minute gaps of the expanded graphite sheet 1. Next, they are pressed by a heating roll to be integrated, and at the same time, the adhesive 4 is thermoset.
Then, it may be aged (usually 24 hours) at room temperature or under heating.
上記実施例において、接着剤４の熱硬化により、その膨
張黒鉛シート１内に浸透した部分が髭状となって投錨効
果を発揮し、膨張黒鉛シート１どうし及びそれと金属箔
３とを強力に接合させる。また極めて薄い金属箔３を用
いているから、成形しやすく、その成形時の圧力により
膨張黒鉛シート１が部分的に剥離したりすることがな
い。In the above-mentioned embodiment, the thermosetting of the adhesive 4 causes the part that has penetrated into the expanded graphite sheet 1 to form a whisker-like shape to exert the anchoring effect and strongly bond the expanded graphite sheets 1 and the metal foil 3 together. Let Further, since the extremely thin metal foil 3 is used, it is easy to mold, and the expanded graphite sheet 1 does not peel off partially due to the pressure at the time of molding.
上記実施例では孔２を穿設した金属箔３を用いたが、第
３図に示す如く、孔２を穿接していない金属箔３を用い
てもよく、この場合、接着剤４によって膨張黒鉛シート
1,1どうしを直接接合させる効果はないが、接着剤４に
よって金属箔３と膨張黒鉛シート１とを強力に接着させ
ることができるので約300℃までの高温雰囲気に適用で
きる。Although the metal foil 3 having the holes 2 formed therein is used in the above-mentioned embodiment, a metal foil 3 having no holes 2 formed therein may be used as shown in FIG. Sheet
Although there is no effect of directly bonding the 1, 1 to each other, since the metal foil 3 and the expanded graphite sheet 1 can be strongly adhered by the adhesive 4, it can be applied to a high temperature atmosphere up to about 300 ° C.
次に具体的実施例を示す。Next, specific examples will be shown.
〔具体例１〕 黒鉛シート１として0.25mm厚さのもの（日立化成株式会
社製黒鉛シートHGP）、金属箔３として30μ厚さの銅
箔、接着剤４として未処理ポリウレタン系樹脂を用い、
それら全体の厚さを0.52mmとし、ローラ式で加圧した。Specific Example 1 A graphite sheet 1 having a thickness of 0.25 mm (Hitachi Chemical Co., Ltd. graphite sheet HGP), a metal foil 3 having a thickness of 30 μm copper foil, and an adhesive 4 made of untreated polyurethane resin are used.
The total thickness of them was set to 0.52 mm, and pressure was applied by a roller method.
〔具体例２〕 膨張黒鉛シート１及び金属箔３として、具体例２と同じ
ものを用い、接着剤として耐熱処理ポリウレタン系樹脂
を用い、それら全体の厚さを0.52mmとし、ローラ式で加
圧した。[Specific Example 2] The same expanded graphite sheet 1 and metal foil 3 as in Specific Example 2 were used, and heat-resistant polyurethane resin was used as an adhesive. The total thickness thereof was 0.52 mm, and the roller type pressure was applied. did.
上記具体例１〜２の試験は、密封流体として窒素ガス、
密封流体圧力20Kg/cm2、ガスケット内外径寸法φ90mm×
φ100mmの試験条件にて、標準ガスシール試験とねじ込
式ガスシール試験を各々行い、その結果は第４図及び第
５図に示すようになった。この第４図（標準ガスシール
試験結果）と第５図（ねじ込式ガスシール試験結果）か
ら明らかなように、優れたシール性を持っていることが
わかった。In the tests of the above-mentioned specific examples 1 and 2, nitrogen gas was used as a sealed fluid,
Sealing fluid pressure 20Kg / cm 2 , inner and outer diameter of gasket φ90mm ×
A standard gas seal test and a screw-in gas seal test were conducted under φ100 mm test conditions, and the results are shown in FIGS. 4 and 5. As is clear from FIG. 4 (standard gas seal test result) and FIG. 5 (screw type gas seal test result), it was found that the product has excellent sealing properties.
（発明の効果） 以上のように、本発明によれば、膨張黒鉛シートを金属
箔によって補強させることで、膨張黒鉛シートが引裂か
れたりしないような十分な強度おもたせることができる
のはもとより、金属箔としては、その厚さが１０〜１０
０μｍと非常に薄いものを使用するので、ガスケットへ
の成形が容易であり、かつ、その形状にともなう膨張黒
鉛シートの変形に金属箔が追従して変形するために、膨
張黒鉛シートが部分的に剥離することもなくて、複雑形
状のガスケットの製作を可能とできる。(Effects of the Invention) As described above, according to the present invention, by reinforcing the expanded graphite sheet with the metal foil, it is possible to provide sufficient strength such that the expanded graphite sheet is not torn. The thickness of the metal foil is 10 to 10
Since a very thin material with a thickness of 0 μm is used, it is easy to mold it into a gasket, and since the metal foil follows the deformation of the expanded graphite sheet due to its shape, the expanded graphite sheet is partially deformed. It is possible to manufacture a gasket having a complicated shape without peeling.
しかも、膨張黒鉛シートと金属箔との接着に膨張黒鉛シ
ートへの浸透性のある熱効果性接着剤を使用することに
より、両者の接着時に接着剤が膨張黒鉛シートの微小隙
間に髭状に浸透し、その浸透した接着剤の硬化にともな
う投錨効果により金属箔と膨張黒鉛シートとの接着力を
非常に高めることができ、接着界面でおすべりを確実に
防止して、特に、高温下での使用時においても、安定し
た強度を保持させることができる。Moreover, by using a heat-effective adhesive that has permeability to the expanded graphite sheet to bond the expanded graphite sheet and the metal foil, the adhesive penetrates into the minute gaps of the expanded graphite sheet in a whisker-like shape when they are bonded. However, due to the anchoring effect that accompanies the hardening of the infiltrated adhesive, the adhesive force between the metal foil and the expanded graphite sheet can be greatly increased, and slipping can be reliably prevented at the adhesive interface, especially at high temperatures. Stable strength can be maintained even during use.
第１図及び第２図は本発明の一実施例を示し、第１図は
拡大断面図、第２図は金属箔の斜視図である。第３図は
本発明の他の実施例を示す金属箔の斜視図である。第４
図は標準ガスシール試験の結果を示すグラフ、第５図は
ねじ込式ガスシール試験の結果を示すグラフ、第６図は
従来のガスケットを示す一部切欠き斜視図である。 １…膨張黒鉛シート ３…金属箔 ４…接着剤1 and 2 show an embodiment of the present invention, FIG. 1 is an enlarged sectional view, and FIG. 2 is a perspective view of a metal foil. FIG. 3 is a perspective view of a metal foil showing another embodiment of the present invention. Fourth
FIG. 5 is a graph showing the results of a standard gas seal test, FIG. 5 is a graph showing the results of a screw-in type gas seal test, and FIG. 6 is a partially cutaway perspective view showing a conventional gasket. 1 ... Expanded graphite sheet 3 ... Metal foil 4 ... Adhesive
Claims (1)
の金属箔とを重ね合せると共にその両者を膨張黒鉛シー
トへの浸透性のある熱硬化性接着剤により接着させてな
るガスケット用素材。1. An expanded graphite sheet having a thickness of 10 to 100 μm.
A material for gaskets, which is made by stacking the above metal foils and adhering the two with a thermosetting adhesive that is permeable to the expanded graphite sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61014387A JPH065109B2 (en) | 1986-01-24 | 1986-01-24 | Gasket material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61014387A JPH065109B2 (en) | 1986-01-24 | 1986-01-24 | Gasket material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62170332A JPS62170332A (en) | 1987-07-27 |
| JPH065109B2 true JPH065109B2 (en) | 1994-01-19 |
Family
ID=11859646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61014387A Expired - Lifetime JPH065109B2 (en) | 1986-01-24 | 1986-01-24 | Gasket material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH065109B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02256970A (en) * | 1989-03-30 | 1990-10-17 | Nippon Valqua Ind Ltd | Joint sheet |
| JP5623819B2 (en) * | 2010-08-02 | 2014-11-12 | 日本特殊陶業株式会社 | Gas seal composite and apparatus comprising the gas seal composite |
| EP4013203B1 (en) * | 2020-12-10 | 2024-07-31 | Laird Technologies (Shenzhen) Ltd. | Electrically and thermally conductive gaskets |
| US12209664B2 (en) | 2020-12-10 | 2025-01-28 | Laird Technologies (Shenzhen) Ltd. | Electrically and thermally conductive gaskets |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52105655U (en) * | 1976-02-09 | 1977-08-11 | ||
| JPS5537663A (en) * | 1978-09-11 | 1980-03-15 | Toshiba Corp | Start system of option hardware |
| JPS5936147B2 (en) * | 1979-03-23 | 1984-09-01 | 日本ピラ−工業株式会社 | Manufacturing method for molded packing that is easy to take out |
-
1986
- 1986-01-24 JP JP61014387A patent/JPH065109B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62170332A (en) | 1987-07-27 |
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