JPH11270689A - Filler material for spiral wound gasket and spirally wound gasket using the filler material - Google Patents
Filler material for spiral wound gasket and spirally wound gasket using the filler materialInfo
- Publication number
- JPH11270689A JPH11270689A JP3049099A JP3049099A JPH11270689A JP H11270689 A JPH11270689 A JP H11270689A JP 3049099 A JP3049099 A JP 3049099A JP 3049099 A JP3049099 A JP 3049099A JP H11270689 A JPH11270689 A JP H11270689A
- Authority
- JP
- Japan
- Prior art keywords
- filler material
- spiral
- wound gasket
- expanded graphite
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 66
- 239000000945 filler Substances 0.000 title claims abstract description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010439 graphite Substances 0.000 claims abstract description 36
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 13
- 238000005452 bending Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 238000005422 blasting Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 239000010425 asbestos Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- -1 steam Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Gasket Seals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水、油、蒸気、ガ
ス等の流体を封止する各種配管継手や流体機器の接合部
などに適用されるうず巻形ガスケット用フィラー材およ
びそのフィラー材を使用したうず巻形ガスケットに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filler material for a spiral wound gasket and a filler material for a spiral-wound gasket which is applied to various pipe joints for sealing a fluid such as water, oil, steam, gas and the like and a joint of fluid equipment. The present invention relates to a spiral-wound gasket using the same.
【０００２】[0002]
【従来の技術】従来から知られている代表的なうず巻形
ガスケットは、断面がＶ字状あるいはＷ字状などの波形
に形成された金属帯板からなるフープ材とアスベストペ
ーパーからなるフィラー材とを互いに重合させた状態で
うず巻き状に巻回したものである。2. Description of the Related Art A typical spiral wound gasket conventionally known is a hoop material made of a metal strip having a V-shaped or W-shaped cross section and a filler material made of asbestos paper. Are spirally wound in a state where they are polymerized with each other.
【０００３】しかし、上記のようなうず巻形ガスケット
においては、フィラー材として用いられるアスベストペ
ーパーが取扱い時に粉塵を発生し、それを人が吸うこと
によって健康障害を起こすことが指摘されていることか
ら、現在ではその使用が控えられる状況にあり、それに
代わるフィラー材として、膨張黒鉛テープを使用してな
るノンアスベストのうず巻形ガスケットが開発されるに
至っている。また、膨張黒鉛テープをフィラー材として
使用するうず巻形ガスケットの更なるシール性の向上を
目的として、膨張黒鉛フィラー材とともに黒鉛入りＰＴ
ＦＥ（四弗化ポリエチレン）繊維からなる補助フィラー
材を併用したものや、膨張黒鉛フィラー材の中間部にそ
の長手方向に沿って延びる炭素繊維を複合してなるもの
なども提案されている。[0003] However, it has been pointed out that in the spiral wound gasket as described above, asbestos paper used as a filler material generates dust during handling and causes a health hazard due to inhalation of dust by humans. However, at present, its use has been refrained, and a non-asbestos spiral wound gasket using expanded graphite tape has been developed as a substitute for the filler material. In order to further improve the sealing properties of spiral wound gaskets using expanded graphite tape as a filler material, graphite-containing PT
There have been proposed ones using an auxiliary filler material made of FE (tetrafluoroethylene) fiber in combination, and ones combining an expanded graphite filler material and a carbon fiber extending along its longitudinal direction at an intermediate portion thereof.
【０００４】[0004]
【発明が解決しようとする課題】上記のようにフィラー
材として膨張黒鉛テープを用いてなる従来のうず巻形ガ
スケットにおいては、次のような問題があった。 （１）膨張黒鉛テープは、引張強度が小さいために、う
ず巻き状に巻回成形する際に切損しやすいという生産上
の問題がある。 （２）膨張黒鉛は、伸びが小さく可撓性に欠けるため
に、金属帯板のフープ材間に形成される空間形状に沿っ
た変形ができず、空隙を発生しやすくなる上に、折り曲
げに対しても割れを発生しやすく、特に断面が波形のフ
ープ材である場合、うず巻き状の巻回成形時に波の頂部
で割れを発生し、その部分に空隙を生じ、それが原因で
幅方向やうず巻きの巻回方向で微量な浸透漏れを発生す
る可能性があった。 （３）膨張黒鉛粒子を加圧しただけの膨張黒鉛テープ
は、内部に微小空隙を有する反面、その表面は膨張黒鉛
粒子が高密度で高配向の緻密な層を有しており、アスベ
ストペーパーを用いる場合に行なっているような各種の
目詰め材の含浸やコーティングが困難である。特に、膨
張黒鉛テープ表面は上記のごとき緻密な層の存在で撥水
性を有しているために、水に対する濡れ性が悪く、例え
ば水分散性タイプの目詰め材の含浸やコーティングによ
るシール性の改善が困難であった。 （４）また、ＰＴＦＥ系の補助シール材を併用したもの
や炭素繊維を複合したものは、材料的に高価でかつ製造
自体も複雑となり、さらにＰＴＦＥ系の補助シール材を
併用したものは耐熱性が低下するという問題もあった。As described above, the conventional spiral wound gasket using an expanded graphite tape as a filler material has the following problems. (1) Since the expanded graphite tape has a low tensile strength, there is a problem in production that it is easily cut when it is wound into a spiral shape. (2) Since expanded graphite lacks flexibility and lacks flexibility, it cannot be deformed along the shape of the space formed between the hoop members of the metal strip, so that voids are likely to be generated and besides being bent. In particular, when the hoop material has a corrugated cross section, cracks occur at the top of the wave during spiral winding forming, creating a void in that part, which causes There was a possibility that a small amount of permeation leakage occurred in the winding direction of the spiral. (3) The expanded graphite tape obtained by simply pressing the expanded graphite particles has minute voids inside, but the surface has a dense layer of expanded graphite particles with high density and high orientation. It is difficult to impregnate or coat various types of plugging materials as they are used. In particular, since the surface of the expanded graphite tape has water repellency due to the presence of the dense layer as described above, the wettability to water is poor, and the sealing property by impregnation or coating of a water-dispersible type plugging material, for example. Improvement was difficult. (4) In addition, a material using a PTFE-based auxiliary sealing material or a compound of carbon fiber is expensive in material and complicated in manufacturing itself, and a material using a PTFE-based auxiliary sealing material is heat-resistant. There is also a problem that is reduced.
【０００５】本発明は上記した実情に鑑みてなされたも
ので、可撓性、曲げ性および柔軟性を大幅に改善して、
生産性の向上を図ることができるとともに、低締付面圧
でのシール性の著しい向上を達成することができるうず
巻形ガスケット用フィラー材およびそのフィラー材を使
用したうず巻形ガスケット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 has greatly improved flexibility, bendability and flexibility.
Provided are a spiral wound gasket filler material and a spiral wound gasket using the filler material, which can improve productivity and can achieve remarkable improvement in sealing performance at low tightening surface pressure. It is intended to be.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明に係るうず巻形ガスケット用フィラ
ー材は、膨張させた黒鉛粒子を加圧して互いに一体化し
てなる膨張黒鉛のテープの表面における少なくとも一部
の高密度部分を除去してなることを特徴とするものであ
り、また、請求項３の発明に係るうず巻形ガスケット
は、上記フィラー材と金属帯板からなるフープ材とを互
いに重合させた状態でうず巻き状に巻回してなることを
特徴とするものである。In order to achieve the above-mentioned object, a filler material for a spiral wound gasket according to the first aspect of the present invention is an expanded graphite tape formed by pressing expanded graphite particles and integrating them with each other. The spiral gasket according to claim 3, wherein at least a part of the high-density portion on the surface is removed, and the hoop material comprising the filler material and the metal strip is provided. Are spirally wound in a state where they are superposed on each other.
【０００７】上記請求項１の発明によれば、高密度な緻
密層部分の除去によってフィラー材としての膨張黒鉛テ
ープの可撓性の改善が図れるとともに、しなやかな曲げ
性を付与することが可能となり、さらに、柔軟性もよく
なって、折れ曲がり強度の改善も図れる。このように各
種の特性改善がなされたフィラーを用いてうず巻形ガス
ケットを構成する請求項３の発明によれば、うず巻き状
に巻回成形する際にフィラー材が切損しにくいために、
ガスケットの生産性の改善が図れる上に、フィラー材を
金属帯板のフープ材間に形成される空間形状に沿って変
形させやすく、かつ、折り曲げに対しても割れにくくて
空隙の発生がない、あるいは非常に少なくすることが可
能で、うず巻形ガスケット全体としてのシール性を著し
く向上することができる。According to the first aspect of the present invention, it is possible to improve the flexibility of the expanded graphite tape as a filler material by removing the high-density dense layer portion, and to impart a flexible bendability. Further, the flexibility is improved, and the bending strength can be improved. According to the invention of claim 3, wherein the spiral-wound gasket is configured using the fillers having various improved properties as described above, the filler material is not easily cut off when the spiral-wound-shaped gasket is formed.
In addition to improving the productivity of the gasket, it is easy to deform the filler material along the space shape formed between the hoop materials of the metal strip, and it is hard to crack even when bent, so that there is no void, Alternatively, it is possible to make it extremely small, and it is possible to remarkably improve the sealing performance of the spiral gasket as a whole.
【０００８】また、請求項２の発明のように、表面の少
なくとも一部が除去された膨張黒鉛テープに目詰め材を
コーティングもしくは含浸させることによって、その目
詰め材を容易にコーティングさせたり、膨張黒鉛テープ
の内部に存在する微小空隙に含浸させやすくなり、低締
付圧でのシール性の改善を図ることが可能となる。[0008] According to the second aspect of the present invention, the plugging material is easily coated or expanded by coating or impregnating the plugging material on the expanded graphite tape from which at least a part of the surface is removed. It becomes easy to impregnate the minute voids existing inside the graphite tape, and it is possible to improve the sealing performance under a low tightening pressure.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を図面
にしたがって説明する。図１〜図３は本発明の実施例１
〜３におけるうず巻形ガスケット用フィラー材１の要部
の断面斜視図、図４は比較例となるうず巻形ガスケット
用フィラー材１の要部の断面斜視図、これら各実施例及
び比較例のうず巻形ガスケット用フィラー材１は全て、
膨張させた黒鉛粒子を加圧して互いに一体化し厚さｔが
０．３８ｍｍのテープ状に形成した膨張黒鉛テープ２の
表裏面に対して各々次のような処理を施したものであ
り、以下、各実施例及び比較例毎に膨張黒鉛テープ２の
表裏面に対する処理について説明する。Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention.
FIG. 4 is a cross-sectional perspective view of a main part of the spiral-wound gasket filler material 1 in FIGS. 1 to 3, FIG. 4 is a cross-sectional perspective view of a main part of the spiral-wound gasket filler material 1 as a comparative example, and FIGS. Filler material 1 for spiral wound gaskets
The following treatments are applied to the front and back surfaces of the expanded graphite tape 2 in which the expanded graphite particles are pressurized and integrated with each other to form a tape having a thickness t of 0.38 mm. The processing for the front and back surfaces of the expanded graphite tape 2 will be described for each of the examples and the comparative examples.
【００１０】実施例１：図１に示すように、上記膨張黒
鉛テープ２を０．５重量％の減量となるように表面２Ａ
を一様にブラスト処理して高密度緻密層部分を除去した
ものである。なお、上記膨張黒鉛テープ２の裏面２Ｂは
高密度緻密層部分のままである。Example 1 As shown in FIG. 1, the expanded graphite tape 2 was coated on the surface 2A so that the weight was reduced by 0.5% by weight.
Is uniformly blasted to remove a high-density dense layer portion. The back surface 2B of the expanded graphite tape 2 remains as a high-density dense layer portion.
【００１１】実施例２：図２に示すように、上記膨張黒
鉛テープ２を合計で１重量％の減量となるように表面２
Ａおよび裏面２Ｂを一様にブラスト処理して表裏の高密
度緻密層部分を除去したものである。Example 2 As shown in FIG. 2, the surface of the expanded graphite tape 2 was adjusted so that the total weight was reduced by 1% by weight.
A and the back surface 2B are uniformly blasted to remove the high-density dense layer portions on the front and back.
【００１２】実施例３：図３に示すように、上記膨張黒
鉛テープ２を合計で１重量％の減量となるように表面２
Ａおよび裏面２Ｂを一様にブラスト処理して表裏の高密
度緻密層部分を除去した後、その表裏両面２Ａ，２Ｂお
よび内部の空隙部分に目詰め材の一例としてのポリエチ
レングリコール３を２０重量％含浸させてなるものであ
る。なお、上記目詰め材としては、ポリエチレングリコ
ールの他にＰＴＦＥ、ワックス、シリコン樹脂、ゴムな
どを用いてもよい。Example 3 As shown in FIG. 3, the surface of the expanded graphite tape 2 was adjusted so that the total weight was reduced by 1% by weight.
A and the back surface 2B are uniformly blasted to remove the high-density dense layer portions on the front and back surfaces. Then, polyethylene glycol 3 as an example of a plugging material is 20% by weight on the front and back surfaces 2A and 2B and inside void portions. It is impregnated. In addition, as the plugging material, PTFE, wax, silicone resin, rubber, or the like may be used in addition to polyethylene glycol.
【００１３】比較例：図４に示すように、上記膨張黒鉛
テープ２の表面２Ａおよび裏面２Ｂともに未処理で高密
度緻密層部分が存在しているものである。Comparative Example: As shown in FIG. 4, both the front surface 2A and the back surface 2B of the expanded graphite tape 2 are untreated and have a high-density dense layer portion.
【００１４】図６は、上記実施例１〜３及び比較例に示
す各フィラー材１と断面が略Ｖ字状に形成された金属帯
板、具体的にはＳＵＳ３０４のフープ材５とを互いに重
合させた状態でうず巻き状に巻回させて、内径ｄ1 ＝７
２．６ｍｍ、外径ｄ2 ＝９２．５ｍｍ、厚さｔ1 ＝１
４．５ｍｍのうず巻形ガスケット（試料）Ｗを作製し
た。なお、上記実施例１については、ブラスト処理によ
り高密度緻密層部分が除去された表面２Ａがフープ材５
の谷に接触するように巻回した。FIG. 6 shows that each filler material 1 shown in the above Examples 1 to 3 and Comparative Example and a metal strip having a substantially V-shaped cross section, specifically a hoop material 5 of SUS304, are superimposed on each other. And then wound in a spiral shape, the inner diameter d 1 = 7
2.6 mm, outer diameter d 2 = 92.5 mm, thickness t 1 = 1
A 4.5 mm spiral gasket (sample) W was produced. In the first embodiment, the surface 2A from which the high-density dense layer was removed by the blast treatment
Was wound so as to contact the valley.
【００１５】上記した実施例１〜３及び比較例のフィラ
ー材１とフープ材５を使用して作製された各うず巻形ガ
スケット（試料）Ｗのそれぞれについて、常温ガスシー
ル試験を実施した。その常温ガスシール試験方法は、図
６に示すように、各試料Ｗを上下一対の加圧フランジ
７，７により所定の締付面圧まで加圧し、その加圧状態
を３分間保持した上、Ｎ2 ガスを負荷して５分間保持
した後、漏洩量を周知の石鹸膜移動法により測定する。
そして、Ｎ2 ガス圧を常圧まで減圧し、続いて次の水
準の締付面圧まで昇圧して、〜を繰り返す方法であ
る。A normal-temperature gas sealing test was performed on each of the spiral gaskets (samples) W manufactured using the filler material 1 and the hoop material 5 of Examples 1 to 3 and Comparative Example. As shown in FIG. 6, the room temperature gas seal test method is such that each sample W is pressed to a predetermined tightening surface pressure by a pair of upper and lower pressing flanges 7, 7 and the pressed state is maintained for 3 minutes. After loading with N 2 gas for 5 minutes, the amount of leakage is measured by a well-known soap film transfer method.
Then, the N 2 gas pressure is reduced to normal pressure, then the pressure is increased to the next level of the tightening surface pressure, and the above steps are repeated.
【００１６】上記のような常温ガスシール試験による結
果は、図７に示すとおりであり、この試験結果から明ら
かなように、実施例１及び実施例２のフィラー材を用い
たうず巻形ガスケットはシール特性に差が認められない
が、比較例よりもシール性に優れており、実施例３のフ
ィラー材を用いたうず巻形ガスケットは、締付面圧が２
００〜８００ｋｇｆ／ｃｍ2 の範囲において、締付面圧
のシール性への効果は余り認められないものの、２００
ｋｇｆ／ｃｍ2 程度の低締付面圧においても優れたシー
ル性を発揮する効果が顕著に認められる。FIG. 7 shows the results of the above-mentioned ordinary temperature gas seal test. As is clear from the test results, the spiral wound gasket using the filler material of Example 1 and Example 2 was not used. Although there is no difference in the seal characteristics, the sealability is superior to that of the comparative example. The spiral wound gasket using the filler material of Example 3 has a tightening surface pressure of 2%.
In the range of 00 to 800 kgf / cm 2 , the effect of the tightening surface pressure on the sealing property is not so much recognized,
Even at a low tightening surface pressure of about kgf / cm 2, the effect of exhibiting excellent sealing properties is remarkably recognized.
【００１７】また、本発明品の一つであるところの上記
実施例２におけるうず巻形ガスケット用フィラー材１と
表１に示す従来品１〜４について、図８に示すように、
肉厚両方向に９０°づつ交互に繰り返し折り曲げる９０
°折曲げテストを行なった。その結果は表２に示す通り
であり、従来品１〜４は最高で１２．２回の折り曲げ可
能回数であったのに対して、本発明品は１０００回以上
の折り曲げ可能回数が得られ、しなやかな曲げ性を有す
ることが分かった。As for the spiral wound gasket filler material 1 in Example 2 which is one of the products of the present invention and the conventional products 1 to 4 shown in Table 1, as shown in FIG.
90 bends alternately in both directions at 90 ° in both directions
° Bending test was performed. The results are as shown in Table 2. Whereas the conventional products 1 to 4 had a maximum of 12.2 bending times, the present invention product obtained 1000 or more bending times, It was found to have flexible bending properties.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】さらに、本発明品の一つであるところの上
記実施例２におけるうず巻形ガスケット用フィラー材１
と表１に示す従来品３，４について、図９に示すような
巻付けテストを行なった。その結果は表３に示す通りで
あり、従来品の最小巻付け可能半径が４．５ｍｍであっ
たのに対して、本発明品の最小巻付け可能半径Ｒは１．
５ｍｍと非常に小さい半径まで巻付け可能で、優れた可
撓性およびしなやかな曲げ性を有することが分かった。Furthermore, the filler material 1 for a spiral wound gasket according to the second embodiment, which is one of the products of the present invention.
And the conventional products 3 and 4 shown in Table 1 were subjected to a winding test as shown in FIG. The results are as shown in Table 3, where the minimum wrappable radius R of the product of the present invention was 1 mm, while the minimum wrappable radius of the conventional product was 4.5 mm.
It has been found that it can be wound to a very small radius of 5 mm, and has excellent flexibility and pliability.
【００２１】[0021]
【表３】 [Table 3]
【００２２】なお、上記各実施例１〜３のフィラー材１
を用いて図５のように、作製されるうず巻形ガスケット
におけるフープ材５としては、断面略Ｖ字状のものに限
られるものでなく、断面略Ｗ字状、略Ｕ字状などの波形
に形成されたもの、さらにはフラット板状のものであっ
てもよい。The filler material 1 of each of Examples 1 to 3 was used.
As shown in FIG. 5, the hoop material 5 in the spiral gasket to be manufactured is not limited to the one having a substantially V-shaped cross section, but has a waveform having a substantially W-shaped cross section or a substantially U-shaped cross section. And a flat plate shape.
【００２３】[0023]
【発明の効果】以上のように、請求項１に記載の発明に
よれば、膨張黒鉛テープ表面の少なくとも一部の高密度
緻密層部分を除去することによって可撓性の改善を図る
ことができるとともに、非常にしなやかな曲げ性を付与
することができ、また、柔軟性もよくなって、うず巻き
状に巻回する時の折れ曲がり強度の著しい改善も図るこ
とができるといったように、アスベストに代えて膨張黒
鉛フィラー材をうず巻形ガスケットのフィラー材として
使用する上で要望される生産面及びシール性能面での諸
特性を、高密度部分の除去という極く簡単な手段により
著しく改善することができるという効果を奏する。As described above, according to the first aspect of the invention, the flexibility can be improved by removing at least a part of the high-density dense layer on the surface of the expanded graphite tape. Along with asbestos, it is possible to provide a very flexible bendability, and also to improve the flexibility and the remarkable improvement of the bending strength when wound in a spiral shape. Various characteristics in terms of production and sealing performance required for using the expanded graphite filler material as the filler material of the spiral wound gasket can be significantly improved by a very simple means of removing high density parts. This has the effect.
【００２４】また、請求項２の発明によれば、上記請求
項１に記載の発明の効果に加えて、表面の少なくとも一
部が除去された膨張黒鉛テープに目詰め材をコーティン
グもしくは含浸させることで、その目詰め材のコーティ
ングもしくは膨張黒鉛テープ内部の微小空隙への含浸が
容易となり、低締付面圧でのシール性の改善を図ること
ができる。According to a second aspect of the present invention, in addition to the effect of the first aspect, an expanded graphite tape from which at least a part of its surface has been removed is coated or impregnated with a plugging material. Therefore, the coating of the filler material or the impregnation into the minute voids inside the expanded graphite tape becomes easy, and the sealing performance with low tightening surface pressure can be improved.
【００２５】請求項３に記載の発明によれば、上述のよ
うにして各種の特性改善がなされたフィラーを用いてう
ず巻形ガスケットを構成することで、うず巻き状に巻回
成形する際のフィラー材の切損をなくして、ガスケット
の生産性の改善を図ることができる上に、フィラー材を
金属帯板のフープ材間に形成される空間形状に沿って変
形させやすく、かつ、折り曲げに対しても割れにくくて
空隙の発生をなくする、あるいは非常に少なくすること
ができ、うず巻形ガスケット全体としてのシール性を著
しく向上することができるという効果を奏する。According to the third aspect of the present invention, the spiral gasket is formed by using the filler whose various characteristics have been improved as described above. In addition to improving the gasket productivity by eliminating breakage of the material, it is also easy to deform the filler material along the space formed between the hoop materials of the metal strip, and Even when the gasket is hardly cracked, the generation of voids can be eliminated or extremely reduced, so that the sealing performance of the spiral gasket as a whole can be significantly improved.
【図１】本発明の実施例１によるうず巻形ガスケット用
フィラー材の要部の断面斜視図である。FIG. 1 is a sectional perspective view of a main part of a spiral wound gasket filler material according to a first embodiment of the present invention.
【図２】本発明の実施例２によるうず巻形ガスケット用
フィラー材の要部の断面斜視図である。FIG. 2 is a sectional perspective view of a main part of a spiral wound gasket filler material according to a second embodiment of the present invention.
【図３】本発明の実施例３によるうず巻形ガスケット用
フィラー材の要部の断面斜視図である。FIG. 3 is a sectional perspective view of a main part of a spiral wound gasket filler material according to Embodiment 3 of the present invention.
【図４】比較例のうず巻形ガスケット用フィラー材の要
部の断面斜視図である。FIG. 4 is a cross-sectional perspective view of a main part of a spiral wound gasket filler material of a comparative example.
【図５】本発明に係るうず巻形ガスケットの半縦断面図
である。FIG. 5 is a semi-longitudinal sectional view of a spiral wound gasket according to the present invention.
【図６】常温ガスシール試験方法の説明図である。FIG. 6 is an explanatory diagram of a normal temperature gas seal test method.
【図７】常温ガスシール試験結果を示す図ある。FIG. 7 is a diagram showing a normal temperature gas seal test result.
【図８】９０°折曲げテストの説明図である。FIG. 8 is an explanatory diagram of a 90 ° bending test.
【図９】巻付けテストの説明図である。FIG. 9 is an explanatory diagram of a winding test.
１ フィラー材 ２ 膨張黒鉛テープ ２Ａ 膨張黒鉛テープの表面 ２Ｂ 膨張黒鉛テープの裏面 ３ ポリエチレングリコール（目詰め材の一例） ４ 凸部 ５ フープ材 Reference Signs List 1 filler material 2 expanded graphite tape 2A surface of expanded graphite tape 2B back surface of expanded graphite tape 3 polyethylene glycol (an example of plugging material) 4 convex portion 5 hoop material
Claims (4)
体化してなる膨張黒鉛のテープの表面における少なくと
も一部の高密度部分を除去してなることを特徴とするう
ず巻形ガスケット用フィラー材。1. A spiral wound gasket filler material characterized by removing at least a part of a high density portion of a surface of an expanded graphite tape formed by pressing expanded graphite particles and integrating them with each other. .
去された上記膨張黒鉛テープに目詰め材をコーティング
もしくは含浸している請求項１に記載のうず巻形ガスケ
ット用フィラー材。2. The spiral wound gasket filler material according to claim 1, wherein a filler is coated or impregnated on the expanded graphite tape from which at least a part of a high-density portion of the surface is removed.
材と金属帯板からなるフープ材とを互いに重合させた状
態でうず巻き状に巻回してなることを特徴とするうず巻
形ガスケット。3. A spiral wound gasket, wherein the filler material according to claim 1 or 2 and a hoop material formed of a metal strip are spirally wound in a state of being superposed on each other.
に形成されたものである請求項３に記載のうず巻形ガス
ケット。4. The spiral gasket according to claim 3, wherein the metal strip serving as the hoop material is formed in a corrugated cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03049099A JP3389522B2 (en) | 1999-02-08 | 1999-02-08 | Filler material for spiral wound gasket and spiral wound gasket using the filler material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03049099A JP3389522B2 (en) | 1999-02-08 | 1999-02-08 | Filler material for spiral wound gasket and spiral wound gasket using the filler material |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9116833A Division JP2952764B2 (en) | 1997-05-07 | 1997-05-07 | Filler material for spiral wound gasket and spiral wound gasket using the filler material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11270689A true JPH11270689A (en) | 1999-10-05 |
| JP3389522B2 JP3389522B2 (en) | 2003-03-24 |
Family
ID=12305289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03049099A Expired - Fee Related JP3389522B2 (en) | 1999-02-08 | 1999-02-08 | Filler material for spiral wound gasket and spiral wound gasket using the filler material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3389522B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006300297A (en) * | 2005-04-25 | 2006-11-02 | Oiles Ind Co Ltd | Spherical band seal body, exhaust pipe joint device using the same, and method for manufacturing spherical band seal body |
| JP2009228690A (en) * | 2008-03-19 | 2009-10-08 | Nippon Gasket Co Ltd | Expanded graphite compound gasket material and manufacturing method thereof |
| JP2011080553A (en) * | 2009-10-08 | 2011-04-21 | Nichias Corp | Spiral gasket and method for manufacturing the same |
| JP2014111996A (en) * | 2014-02-28 | 2014-06-19 | Nichias Corp | Spiral gasket and manufacturing method of the same |
-
1999
- 1999-02-08 JP JP03049099A patent/JP3389522B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006300297A (en) * | 2005-04-25 | 2006-11-02 | Oiles Ind Co Ltd | Spherical band seal body, exhaust pipe joint device using the same, and method for manufacturing spherical band seal body |
| JP2009228690A (en) * | 2008-03-19 | 2009-10-08 | Nippon Gasket Co Ltd | Expanded graphite compound gasket material and manufacturing method thereof |
| JP2011080553A (en) * | 2009-10-08 | 2011-04-21 | Nichias Corp | Spiral gasket and method for manufacturing the same |
| JP2014111996A (en) * | 2014-02-28 | 2014-06-19 | Nichias Corp | Spiral gasket and manufacturing method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3389522B2 (en) | 2003-03-24 |
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