JPH06249345A - Spiral gasket - Google Patents

Spiral gasket

Info

Publication number
JPH06249345A
JPH06249345A JP6350193A JP6350193A JPH06249345A JP H06249345 A JPH06249345 A JP H06249345A JP 6350193 A JP6350193 A JP 6350193A JP 6350193 A JP6350193 A JP 6350193A JP H06249345 A JPH06249345 A JP H06249345A
Authority
JP
Japan
Prior art keywords
weight
paper
filler material
spiral
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.)
Pending
Application number
JP6350193A
Other languages
Japanese (ja)
Inventor
Shunji Nakamura
俊二 中村
Eiji Yonemochi
英司 米持
Keiichi Tatsumi
恵一 辰巳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nichias Corp
Original Assignee
Nichias Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nichias Corp filed Critical Nichias Corp
Priority to JP6350193A priority Critical patent/JPH06249345A/en
Publication of JPH06249345A publication Critical patent/JPH06249345A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide a spiral gasket having favorable and stable seal ability under high temperature. CONSTITUTION:In a spiral gasket consisting of a hoop material and a filler material superposed and wound up in spiral, the filler material is formed with a composition consisting of 90.0-99.7wt.% of swelling mica with 0.1-100.0mu of a mean grain diameter and 0.3-10weight% of an inorganic fiber and/or a binder. Thereby, a swelling mica particle which is a main component does not change its weight upto 930 deg.C and reduces its weight by some amount upto 1000 deg.C in a sample of differential thermal analysis, but there is no problem in practical use and it is possible to have excellent heat resistance and make a minute and very smooth paper. Therefore, a spiral gasket in which the paper is used as the filler material can display a favorable and stable seal ability under high temperature.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、機械器具、圧力容器や
管などの接合面のような固定接着面の間に挾み、ボルト
その他の手段で締め付けて流体の漏れを防ぐ渦巻形ガス
ケットに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral gasket which prevents fluid leakage by being sandwiched between fixed adhesive surfaces such as joining surfaces of machine tools, pressure vessels and pipes, and tightened by bolts or other means to prevent fluid leakage. .

【0002】[0002]

【従来の技術】従来、金属製薄帯板(フープ材)と、非
金属製材料(フィラー材)をクッションになるように交
互に重ね合わせ渦巻状に巻回して構成した渦巻形ガスケ
ットにおいては、前記フィラー材に石綿紙、膨張黒鉛シ
ート、ふっ素樹脂シート、石綿繊維以外の繊維を基材と
したペーパーが使われている。
2. Description of the Related Art Conventionally, in a spiral wound gasket formed by alternately laminating a thin metal strip plate (hoop material) and a non-metallic material (filler material) so as to form a cushion and winding them in a spiral shape, As the filler material, asbestos paper, expanded graphite sheet, fluororesin sheet, and paper based on a fiber other than asbestos fiber are used.

【0003】[0003]

【発明が解決しようとする課題】従来のフィラー材とし
て石綿紙を使用した渦巻形ガスケットでは、石綿の使用
が環境衛生上問題となっていることから、その使用が控
えられるようになっている。また、石綿紙の主成分であ
る石綿繊維(クリソタイル石綿)は400〜500℃の
温度範囲で、その組織内の結晶水が失われ始め、約80
0℃でほとんど結晶水が焼失し、脆化を生じるため、石
綿紙によるフィラー材は高温でのシール性は必ずしも充
分でなく、その向上が課題となっている。石綿紙にかわ
るフィラー材としては、膨張黒鉛シート、ふっ素樹脂シ
ートおよび石綿繊維以外の繊維を基材としたペーパーが
ある。
In the conventional spiral wound gasket using asbestos paper as the filler material, the use of asbestos has become a problem in terms of environmental hygiene, and therefore its use has been refrained from. In addition, asbestos fiber (chrysotile asbestos), which is the main component of asbestos paper, begins to lose crystal water in its structure within a temperature range of 400 to 500 ° C.
Most of the crystal water is burned off at 0 ° C. to cause embrittlement, so that the filler material made of asbestos paper does not always have sufficient sealability at high temperatures, and its improvement is a problem. As a filler material that replaces asbestos paper, there are expanded graphite sheets, fluororesin sheets, and papers based on fibers other than asbestos fibers.

【0004】しかし、膨張黒鉛シートを使用した渦巻形
ガスケットでは最近の技術レベルの向上に伴う高圧化傾
向に追従し、シール性は石綿紙より向上しているが、5
00℃以上の酸化雰囲気下での使用では酸化焼失し、シ
ール性が悪くなるため、使用範囲に問題がある。
However, the spiral type gasket using the expanded graphite sheet follows the trend of higher pressure due to the recent improvement of the technical level, and the sealing property is higher than that of asbestos paper.
When it is used in an oxidizing atmosphere at 00 ° C. or higher, it is oxidized and burned out, and the sealing property deteriorates, so that there is a problem in the range of use.

【0005】ふっ素樹脂シートを使用した渦巻形ガスケ
ットでは、ふっ素樹脂が熱可塑性高分子材料であり、耐
高温性についてはまったく問題にならない。石綿繊維以
外の繊維を基材としたペーパーを使用した渦巻形ガスケ
ットでは、ペーパーを抄造法により作るため、有機繊維
や有機バインダーを含んでおり、350℃までの使用が
限界であり耐熱性に問題がある。
In a spiral wound gasket using a fluororesin sheet, the fluororesin is a thermoplastic polymer material, and the high temperature resistance does not matter at all. Spiral gaskets that use paper based on fibers other than asbestos fibers contain organic fibers and binders because the paper is made by the paper-making method, and use at temperatures up to 350 ° C is a limitation, and heat resistance is a problem. There is.

【0006】[0006]

【発明の目的】本発明は、上記の問題に鑑みてなされた
ものであって、400〜500℃以上の温度下で良好、
かつ安定したシール性を有する渦巻形ガスケットを提供
することを目的としている。
DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and is satisfactory under a temperature of 400 to 500 ° C. or higher.
Moreover, it is an object of the present invention to provide a spiral gasket having a stable sealing property.

【0007】[0007]

【課題を解決するための手段】本発明は、フープ材にフ
ィラー材を重ね合わせて渦巻状に巻回して構成する渦巻
形ガスケットにおいて、フィラー材の素材として、膨潤
性雲母の特性に着目し、これを主成分として使用するこ
とによって、渦巻形ガスケットに要求される400〜5
00℃以上の高温下で良好、かつ安定したシール性が得
られることを見出し、その知見に基づいて本発明を完成
したものである。
DISCLOSURE OF THE INVENTION The present invention, in a spiral gasket constituted by superposing a filler material on a hoop material and winding it in a spiral shape, paying attention to the characteristics of swelling mica as a material of the filler material, By using this as a main component, it is possible to obtain 400 to 5 required for the spiral gasket.
The present invention has been completed based on the finding that good and stable sealing properties can be obtained at high temperatures of 00 ° C or higher.

【0008】即ち、本発明は、フープ材とフィラー材と
を重ね合わせて渦巻状に巻回して構成する渦巻形ガスケ
ットにおいて、前記フィラー材を、平均粒径0.1〜1
00.0μの膨潤性雲母90.0〜99.7重量%と、
無機繊維および/または結合材0.3〜10重量%とか
らなる組成物で形成したことを要旨としている。前記無
機繊維には、シリカ・アルミナ繊維、ガラス繊維等が挙
げられる。また、結合材には、PVA、アクリル酸エス
テルエマルジョン等が挙げられる。
That is, according to the present invention, in a spiral gasket formed by superposing a hoop material and a filler material and winding them in a spiral shape, the filler material has an average particle diameter of 0.1 to 1
00.0μ swelling mica 90.0-99.7% by weight,
The gist is that it is formed of a composition composed of inorganic fibers and / or a binder of 0.3 to 10% by weight. Examples of the inorganic fibers include silica / alumina fibers and glass fibers. Further, examples of the binder include PVA and acrylic ester emulsion.

【0009】[0009]

【作用】本発明の渦巻形ガスケットにおいて、フィラー
材の主成分として配合される膨潤性雲母は、合成雲母の
一種である膨潤性ナトリウムふっ素雲母である。この膨
潤性雲母粒子は示差熱分析例では930℃まで重量変化
が見られず、1000℃までは若干の減量はあるが、実
用上差し支えなく、非常に優れた耐熱性およびシール性
を有している。また、膨潤性雲母粒子は、特に強い自己
接着性を有すため、結合材を用いることなく、または極
く少量の結合材でペーパーにすることができ、高温での
結合材の消失による影響がなくなるため、耐熱性に優れ
たフィラー材が得られる。また、膨潤性雲母を主成分と
したペーパーにおいては、膨潤性雲母粒子が平均粒径
(5ミクロン以下)で薄層化しており、薄層化粒子は乾
燥過程で再配列する自己制御性を有しているため、緻密
で非常に平滑なペーパーになるため、シール性に優れた
フィラー材が得られる。これらのことが、高温下で良
好、かつ安定したシール性を有する渦巻形ガスケットを
提供する要因となっている。
In the spiral gasket of the present invention, the swellable mica which is mixed as the main component of the filler material is swellable sodium fluoromica which is a kind of synthetic mica. In the differential thermal analysis example, the swelling mica particles showed no weight change up to 930 ° C. and showed a slight weight loss up to 1000 ° C., but there was no problem in practical use, and they had excellent heat resistance and sealing properties. There is. Further, since the swellable mica particles have a particularly strong self-adhesive property, they can be made into paper without using a binder or with a very small amount of a binder, and the influence of the disappearance of the binder at high temperature is Since it disappears, a filler material having excellent heat resistance can be obtained. Further, in the paper containing swelling mica as a main component, the swelling mica particles are thinned with an average particle size (5 μm or less), and the thinned particles have a self-controlling property of rearranging during the drying process. As a result, a dense and very smooth paper is obtained, and a filler material having excellent sealing properties can be obtained. These are factors that provide a spiral gasket having good and stable sealing properties at high temperatures.

【0010】また、従来のマイカ板なるものは非常に硬
く脆いもので、ペーパーにするのは不可能であったが、
平均粒径0.1〜100μの粒度の細かい膨潤性雲母粒
子を使用することにより、柔軟なペーパーにすることが
可能である。さらに、無機質繊維および/または結合材
を添加することによって、引張強度と柔軟性を持たせる
ことができ、また抄造法により製造する場合は濾水性を
確保することができる。
Further, the conventional mica plate is very hard and brittle, and it was impossible to make it into paper.
By using fine swelling mica particles having an average particle size of 0.1 to 100 μm, a soft paper can be obtained. Furthermore, by adding an inorganic fiber and / or a binder, it is possible to impart tensile strength and flexibility, and it is possible to secure drainage when manufactured by a papermaking method.

【0011】前記膨潤性雲母の配合は、前述したよう
に、90.0〜99.7重量%の範囲がよく、90重量
%未満では耐熱性が低下して好ましくない。また、使用
する膨潤性雲母の平均粒径は100μ以上に大きくなる
と、自己接着性が弱くなり、得られたペーパーはボード
のように硬くなり、柔軟性が失われる。
As described above, the content of the swelling mica is preferably in the range of 90.0 to 99.7% by weight, and if it is less than 90% by weight, the heat resistance is lowered, which is not preferable. When the average particle size of the swellable mica used is 100 μm or more, the self-adhesiveness is weakened and the obtained paper becomes hard like a board and loses flexibility.

【0012】[0012]

【実施例】以下、本発明を実施例および比較例に基づい
て具体的に説明する。
EXAMPLES The present invention will be specifically described below based on Examples and Comparative Examples.

【0013】実施例(1) 膨潤性雲母90重量%、シリカ・アルミナ繊維10重量
%よりなる組成物を用いて、水分散スラリーを調整し、
これを長網式抄造機や円網式抄造機等による通常の抄造
法によって抄造することにより得られるペーパーをフィ
ラー材として用いて渦巻形ガスケットを得た。
Example (1) An aqueous dispersion slurry was prepared using a composition comprising 90% by weight of swelling mica and 10% by weight of silica / alumina fiber,
A spiral gasket was obtained by using the paper obtained by paper-making this by a normal paper-making method with a Fourdrinier paper machine or a cylinder-paper machine as a filler material.

【0014】実施例(2) 膨潤性雲母97重量%、PVA3重量%よりなる組成物
を用いて、これをドクターブレード法により得られるシ
ートをフィラー材として用いて渦巻形ガスケットを得
た。
Example (2) A spiral wound gasket was obtained by using a composition composed of 97% by weight of swelling mica and 3% by weight of PVA, and using a sheet obtained by the doctor blade method as a filler material.

【0015】実施例(3) 膨潤性雲母95重量%、PVA3重量%、シリカ・アル
ミナ繊維2重量%よりなる組成物を用いて、これをドク
ターブレード法により得られるシートをフィラー材とし
て用い渦巻形ガスケットを得た。
Example (3) A composition consisting of 95% by weight of swelling mica, 3% by weight of PVA and 2% by weight of silica / alumina fiber was used, and the sheet obtained by the doctor blade method was used as a filler material to form a spiral shape. I got a gasket.

【0016】比較例(1) 膨潤性雲母82重量%、アラミド繊維10重量%、アク
リル酸エステルエマルジョン8重量%よりなる組成物を
用いて、水分散スラリーを調整し、これを長網式抄造機
や円網式抄造機等による通常の抄造法によって抄造する
ことにより得られるペーパーをフィラー材として用いて
渦巻形ガスケットを得た。
Comparative Example (1) A water-dispersed slurry was prepared using a composition consisting of 82% by weight of swelling mica, 10% by weight of aramid fiber, and 8% by weight of acrylic ester emulsion. A spiral wound gasket was obtained by using paper obtained by papermaking as a filler material by an ordinary papermaking method such as a paper making machine or a cylinder type papermaking machine.

【0017】比較例(2) 膨潤性雲母30重量%、アラミド繊維5重量%、シリカ
・アルミナ繊維5重量%タルク25重量%、グラファイ
ト25重量%、アクリル酸エステルエマルジョン10重
量%よりなる組成物を用いて、水分散スラリーを調整
し、これを長網式抄造機や円網式抄造機等による通常の
抄造法によって抄造することにより得られるペーパーを
フィラー材として用いて渦巻形ガスケットを得た。
Comparative Example (2) A composition comprising 30% by weight of swelling mica, 5% by weight of aramid fiber, 5% by weight of silica / alumina fiber, 25% by weight of talc, 25% by weight of graphite and 10% by weight of acrylic ester emulsion. A water-dispersed slurry was prepared by using the paper, and a spiral gasket was obtained by using a paper obtained as a filler material by paper-making the paper by an ordinary paper-making method using a Fourdrinier paper machine or a cylinder-paper machine.

【0018】比較例(3) 膨潤性雲母82重量%、充填材(タルクとグラファイ
ト)10重量%、シリカ・アルミナ繊維8重量%よりな
る組成物を用いて、水分散スラリーを調整し、これを長
網式抄造機や円網式抄造機等による通常の抄造法によっ
て抄造することにより得られるペーパーをフィラー材と
して用いて渦巻形ガスケットを得た。
Comparative Example (3) A water-dispersed slurry was prepared using a composition consisting of 82% by weight of swelling mica, 10% by weight of fillers (talc and graphite), and 8% by weight of silica / alumina fiber. A spiral gasket was obtained by using, as a filler material, a paper obtained by papermaking by a normal papermaking method using a Fourdrinier paper machine or a cylinder paper machine.

【0019】比較例(4) 膨潤性雲母50重量%、充填材(タルクとグラファイ
ト)45重量%、シリカ・アルミナ繊維2重量%、PV
A3重量%よりなる組成物を用いて、これをドクターブ
レード法により得られたシートをフィラー材として用い
て渦巻形ガスケットを得た。
Comparative Example (4) Swellable mica 50% by weight, filler (talc and graphite) 45% by weight, silica / alumina fiber 2% by weight, PV
A spiral wound gasket was obtained by using a composition of A3 wt% and using a sheet obtained by the doctor blade method as a filler material.

【0020】比較例(5) 石綿繊維90重量%、有機結合材10重量%よりなる組
成物を用い、抄造法によって得られたペーパーをフィラ
ー材として用いて渦巻形ガスケットを得た。
Comparative Example (5) A spiral wound gasket was obtained by using a composition comprising 90% by weight of asbestos fiber and 10% by weight of an organic binder, and using the paper obtained by the papermaking method as a filler material.

【0021】ガスケットのシール性:上記実施例および
各比較例のフィラー材を用いた外輪付き渦巻形ガスケッ
ト(JPI クラス150 1B)を試料とし、これを
所定のフランジに挾み、所定の締付面圧700kgf/cm2
で締め付け、内部流体としてN2ガスを用いて所定の内
圧(10.5kgf/cm2)を加え、10分間の漏れ量を水
上置換で測定した。さらに、これを電気炉で400℃、
5時間加熱後、500℃、5時間加熱後の漏れ量を同様
にして測定した。結果を表1に示す。なお、試料本体の
みのシール性を測定するため、外輪には両面に各4本づ
つ溝を入れておいた。
Sealing property of gasket: A spiral type gasket with an outer ring (JPI class 1501B) using the filler material of the above-mentioned examples and each comparative example was used as a sample, and it was sandwiched by a predetermined flange to have a predetermined tightening surface. Pressure 700kgf / cm 2
Then, a predetermined internal pressure (10.5 kgf / cm 2 ) was added using N 2 gas as the internal fluid, and the leak amount for 10 minutes was measured by water replacement. Furthermore, this is 400 degreeC with an electric furnace,
After heating for 5 hours, the leak amount after heating at 500 ° C. for 5 hours was measured in the same manner. The results are shown in Table 1. In order to measure the sealing property of only the sample body, the outer ring was provided with four grooves on each side.

【0022】[0022]

【表1】 [Table 1]

【0023】表1に示すように、膨潤性雲母と、無機質
繊維および/または結合材とよりなる組成物を用いて形
成したフィラー材を使用した渦巻形ガスケットは、40
0〜500℃の温度では、石綿紙を使用した渦巻形ガス
ケットと同程度以上の良好なシール性を有し、さらに高
温下でも膨潤性雲母、無機質繊維の劣化がない1000
℃位までは安定したシール性が得られる。
As shown in Table 1, a spiral wound gasket using a filler material formed by using a composition comprising swellable mica and an inorganic fiber and / or a binder is 40
At a temperature of 0 to 500 ° C., it has a good sealing property comparable to or better than that of a spiral wound gasket using asbestos paper, and does not deteriorate the swelling mica and the inorganic fiber even at high temperature.
Stable sealability can be obtained up to about ℃.

【0024】[0024]

【発明の効果】以上に述べたように、本発明によれば、
膨潤性雲母と、無機質繊維および/または結合材とより
なる組成物をフィラー材に使用したので、400〜50
0℃以上の高温下で良好、かつ安定したシール性を確保
することができる渦巻形ガスケットが得られる。
As described above, according to the present invention,
Since a composition comprising a swelling mica and an inorganic fiber and / or a binder was used as a filler material, it was 400 to 50.
A spiral gasket capable of ensuring good and stable sealing properties at a high temperature of 0 ° C. or higher is obtained.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 フープ材とフィラー材とを重ね合わせて
渦巻状に巻回して構成する渦巻形ガスケットにおいて、
前記フィラー材を、平均粒径0.1〜100.0μの膨
潤性雲母90.0〜99.7重量%と、無機繊維および
/または結合材0.3〜10重量%とからなる組成物で
形成したことを特徴とする渦巻形ガスケット。
1. A spiral gasket formed by superposing a hoop material and a filler material and winding them in a spiral shape,
The filler material is a composition comprising 90.0 to 99.7% by weight of swelling mica having an average particle size of 0.1 to 100.0 and 0.3 to 10% by weight of inorganic fibers and / or binder. A spiral gasket characterized by being formed.
JP6350193A 1993-02-26 1993-02-26 Spiral gasket Pending JPH06249345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6350193A JPH06249345A (en) 1993-02-26 1993-02-26 Spiral gasket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6350193A JPH06249345A (en) 1993-02-26 1993-02-26 Spiral gasket

Publications (1)

Publication Number Publication Date
JPH06249345A true JPH06249345A (en) 1994-09-06

Family

ID=13231048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6350193A Pending JPH06249345A (en) 1993-02-26 1993-02-26 Spiral gasket

Country Status (1)

Country Link
JP (1) JPH06249345A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000043389A1 (en) * 1999-01-21 2000-07-27 L'oreal Novel cationic di-methylenedioxy-benzenes, their use for oxidation dyeing of keratin fibres
WO2004046590A1 (en) * 2002-11-20 2004-06-03 Nippon Valqua Industries, Ltd. Ground packing
EP1748041A1 (en) * 2004-05-19 2007-01-31 Mitsubishi Chemical Corporation Process for producing (meth)acrolein or (meth)acrylic acid
JP2007127178A (en) * 2005-11-02 2007-05-24 Nippon Valqua Ind Ltd Spiral type gasket
WO2015015737A1 (en) 2013-08-01 2015-02-05 ニチアス株式会社 Sheet composed of exfoliated clay mineral and method for producing same

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000043389A1 (en) * 1999-01-21 2000-07-27 L'oreal Novel cationic di-methylenedioxy-benzenes, their use for oxidation dyeing of keratin fibres
FR2788774A1 (en) * 1999-01-21 2000-07-28 Oreal Cationic di-methylene- dioxy-benzenes for use as oxidation dye precursors in compositions for oxidation-dyeing of keratin fibres, contain at least one cationic group including quaternized cycles
WO2004046590A1 (en) * 2002-11-20 2004-06-03 Nippon Valqua Industries, Ltd. Ground packing
US7270875B2 (en) 2002-11-20 2007-09-18 Nippon Valqua Industries, Ltd. Gland packing
CN100376826C (en) * 2002-11-20 2008-03-26 日本华尔卡工业株式会社 Ground packing
EP1748041A1 (en) * 2004-05-19 2007-01-31 Mitsubishi Chemical Corporation Process for producing (meth)acrolein or (meth)acrylic acid
EP1748041A4 (en) * 2004-05-19 2008-02-06 Mitsubishi Chem Corp Process for producing (meth)acrolein or (meth)acrylic acid
US7868202B2 (en) 2004-05-19 2011-01-11 Mitsubishi Chemical Corporation Process for producing (meth)acrolein or (meth)acrylic acid
JP2007127178A (en) * 2005-11-02 2007-05-24 Nippon Valqua Ind Ltd Spiral type gasket
WO2015015737A1 (en) 2013-08-01 2015-02-05 ニチアス株式会社 Sheet composed of exfoliated clay mineral and method for producing same
US10563104B2 (en) 2013-08-01 2020-02-18 Nichias Corporation Sheet composed of exfoliated clay mineral and method for producing same

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