JPH0259188B2 - - Google Patents

Info

Publication number
JPH0259188B2
JPH0259188B2 JP58040905A JP4090583A JPH0259188B2 JP H0259188 B2 JPH0259188 B2 JP H0259188B2 JP 58040905 A JP58040905 A JP 58040905A JP 4090583 A JP4090583 A JP 4090583A JP H0259188 B2 JPH0259188 B2 JP H0259188B2
Authority
JP
Japan
Prior art keywords
liquid gasket
resistance
gasket
fiber
carbonized
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
Application number
JP58040905A
Other languages
Japanese (ja)
Other versions
JPS59166577A (en
Inventor
Kicha Yano
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.)
Nippon Pillar Packing Co Ltd
Original Assignee
Nippon Pillar Packing Co Ltd
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 Nippon Pillar Packing Co Ltd filed Critical Nippon Pillar Packing Co Ltd
Priority to JP4090583A priority Critical patent/JPS59166577A/en
Publication of JPS59166577A publication Critical patent/JPS59166577A/en
Publication of JPH0259188B2 publication Critical patent/JPH0259188B2/ja
Granted legal-status Critical Current

Links

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  • Sealing Material Composition (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) この発明は、シール媒体として塗布して使用す
るような液状ガスケツトに関し、さらに詳しくは
無害で耐熱、耐圧および耐食性に富み、いかなる
用途にも適用できる液状ガスケツトに関する。 (従来技術) 従来、この種の液状ガスケツトは、常温のみな
らず高温、高圧等の悪条件下でも使用できるよう
に、そのガスケツトの成分中に短繊維アスベスト
(石綿)を若干量含有させて耐熱性および耐圧性
をもたせていた。 (従来技術の問題点) ところでアスベストは耐食性を低下させる塩素
を多量に含有しているため、原子力関係の設備に
は使用不適であり、また近年発癌物質として問題
視されており、使用に際しては多くの規制を受け
ている。 そのため、アスベストに代替し得る材料とし
て、ガラス繊維系の無機質繊維を用いるが、アス
ベストに対して耐熱性に劣り、9〜20μmの太い
繊維径であるため、液状ガスケツトを構成する樹
脂材料中に繊維の緻密な分散が不可能である。 また、ガラス繊維は剛直であるために、ガスケ
ツトの作る被膜の外圧による歪に追従できず、そ
の結果、液状ガスケツトに耐熱性及び耐圧性の機
能をもたせることができなかつた。 (発明の目的) そこでこの発明は、有害物質を有することなく
耐熱、耐圧および耐食性のそれぞれを得ることが
できる充填補強材を備えた液状ガスケツトの提供
を目的とする。 (発明の構成) すなわち、この発明は10μm以下の径で0.5〜5
mmの長さを有する炭化繊維を、液状ガスケツトの
充填補強材として5〜50%含有したことを特徴と
する。 上述の炭化繊維は、その繊維径が10μmを超え
てしまうと剛直性を誘引して耐熱、耐圧強度を低
下させるため、10μm以下が好ましい。また繊維
長さは0.5mm未満では充填補強材の役目を果さず、
5mmを超えると液状ガスケツトとしての分散不良
を生じて不均一組成となるので0.5〜5mmが好ま
しい。 上述の炭化繊維は、結合剤等を含む液状ガスケ
ツトの組成中5〜50%含有させることにより、そ
の液状ガスケツトの機能を高め得るものであつ
て、5%未満では耐熱、耐圧性能に乏しく、50%
を超えると粘性抵抗を増して、ペースト状あるい
は液状を呈し難くなり、塗布および展延の点から
好ましくない。 (発明の効果) この発明によれば、所定の大きさで、かつ炭化
処理した炭化繊維を液状ガスケツトの充填補強材
として用いることにより、アスベストを備えた液
状ガスケツトと同等の耐熱と耐圧とに加えて耐食
能力を発揮することができる。 しかもこの炭化繊維は、塩素や硫黄等の有害成
分がなく、原子力関係等の用途にも規制を受ける
ことなく使用できるばかりか、信頼性の高い液状
ガスケツトとなる。 即ち、本発明によれば次のような具体的な効果
が期待できる。 炭化繊維の繊維径が細いので、樹脂中への微
密な分散が可能となり、そのため、ガスケツト
被膜の強度が向上する。 炭化繊維がしなやかであるため、ガスケツト
部分の外圧による歪に繊維が追従し、ガスケツ
トの耐圧性が向上する。 繊維は塩素を含まないため、耐食性が向上す
る。 (発明の実施例) この発明に係る液状ガスケツトの一実施例につ
いて説明する。 まず、炭化繊維を製造する場合は、アクリロニ
トリル、セルロース等の炭化繊維素材を、まず前
処理として250〜300度Cの酸化雰囲気中で0.5〜
2時間加熱保持し、次いで300〜600度Cの不活性
ガス雰囲気中で加熱する。これにより、繊維分子
は3次元構成をとり、不融化されているものの、
炭化は低位にあり、一般に言う導電性はもたない
耐炎繊維となつて10μm以下の繊維径で、かつ0.5
〜5mmの繊維長さの炭化繊維が設けられる。 そして、液状ガスケツトは、この炭化繊維のほ
かに珪素系ゴム、弗素系ゴム、アクリロニトリル
ゴム等の合成ゴムおよび天然ゴム等のゴム材を主
成分とした結合剤が用いられ、これにフエノール
樹脂、エポキシ樹脂等の樹脂材および耐熱、耐
圧、耐食、液状等に適した種々の成分を若干量含
有させる。 このようにして得られた、この発明例の液状ガ
スケツトと、従来例の液状ガスケツトとを比して
次に説明する。 下表は室温と高温下での耐圧強度の試験結果を
示す。
(Industrial Application Field) The present invention relates to a liquid gasket that is applied and used as a sealing medium, and more particularly relates to a liquid gasket that is harmless, has high heat resistance, pressure resistance, and corrosion resistance, and can be applied to any purpose. (Prior art) Conventionally, this type of liquid gasket has been heat-resistant by containing a small amount of short fiber asbestos (asbestos) in its components so that it can be used not only at room temperature but also under adverse conditions such as high temperature and high pressure. It had high strength and pressure resistance. (Problems with conventional technology) By the way, asbestos contains a large amount of chlorine, which reduces its corrosion resistance, making it unsuitable for use in nuclear power-related equipment.In recent years, asbestos has also been viewed as a problem as a carcinogen, and many is subject to regulations. For this reason, glass fiber-based inorganic fibers are used as a material that can replace asbestos, but they are inferior to asbestos in heat resistance and have a thick fiber diameter of 9 to 20 μm. It is impossible to achieve a fine dispersion of Furthermore, since glass fibers are rigid, they cannot follow the distortion caused by external pressure in the coating formed by the gasket, and as a result, it has been impossible to provide the liquid gasket with heat-resistant and pressure-resistant functions. (Objective of the Invention) Therefore, the object of the present invention is to provide a liquid gasket equipped with a filling reinforcing material that can obtain heat resistance, pressure resistance, and corrosion resistance without containing harmful substances. (Structure of the invention) In other words, this invention has a diameter of 10 μm or less and a diameter of 0.5 to 5 μm.
It is characterized by containing 5 to 50% of carbonized fibers having a length of mm as a filling reinforcing material for the liquid gasket. The above-mentioned carbonized fibers preferably have a diameter of 10 μm or less, because if the fiber diameter exceeds 10 μm, it will induce rigidity and reduce heat resistance and pressure resistance. In addition, if the fiber length is less than 0.5 mm, it will not function as a filling reinforcing material.
If it exceeds 5 mm, poor dispersion as a liquid gasket will occur, resulting in a non-uniform composition, so 0.5 to 5 mm is preferred. The above-mentioned carbonized fiber can improve the function of the liquid gasket by containing it in a composition of 5 to 50% including a binder, etc. If it is less than 5%, the heat resistance and pressure resistance are poor. %
If it exceeds the above range, the viscous resistance will increase, making it difficult to form a paste or liquid state, which is unfavorable from the viewpoint of coating and spreading. (Effects of the Invention) According to the present invention, by using carbonized fibers of a predetermined size and carbonized as a filling reinforcing material for a liquid gasket, it has heat resistance and pressure resistance equivalent to that of a liquid gasket containing asbestos. It can exhibit corrosion resistance ability. Furthermore, this carbonized fiber does not contain harmful components such as chlorine and sulfur, and can be used in nuclear power-related applications without being subject to regulations, and it also becomes a highly reliable liquid gasket. That is, according to the present invention, the following specific effects can be expected. Since the carbonized fibers have a small fiber diameter, they can be finely dispersed in the resin, thereby improving the strength of the gasket coating. Since the carbonized fibers are flexible, the fibers follow the distortion caused by external pressure in the gasket area, improving the pressure resistance of the gasket. The fibers do not contain chlorine, which improves their corrosion resistance. (Embodiment of the Invention) An embodiment of the liquid gasket according to the present invention will be described. First, when producing carbonized fibers, carbonized fiber materials such as acrylonitrile and cellulose are first pretreated in an oxidizing atmosphere at 250 to 300 degrees Celsius.
The mixture is kept heated for 2 hours and then heated in an inert gas atmosphere at 300-600 degrees Celsius. As a result, the fiber molecules take on a three-dimensional configuration, and although they are infusible,
Carbonization is at a low level, making it a flame-resistant fiber with no general electrical conductivity, and a fiber diameter of 10 μm or less, and a fiber diameter of 0.5 μm or less.
Carbonized fibers with a fiber length of ~5 mm are provided. In addition to the carbonized fibers, the liquid gasket uses a binder mainly composed of synthetic rubber such as silicon rubber, fluorine rubber, acrylonitrile rubber, and rubber materials such as natural rubber. Some amount of resin material such as resin and various components suitable for heat resistance, pressure resistance, corrosion resistance, liquid state, etc. are contained. The liquid gasket thus obtained according to the present invention and the conventional liquid gasket will be compared and explained below. The table below shows the test results for compressive strength at room temperature and high temperature.

【表】 なお従来例A.Bに使用した液状ガスケツトは通
常市販されているものを引用したため、その組成
は省略する。 上表のごとく、炭化繊維を15%含有した[発明
例1]の液状ガスケツトは温度状態にかかわらず
高耐圧強度が得られることが認められた。 また、炭化繊維の含有量が10%と若干少ない
[発明例2]の場合においても、従来例A.Bに比
べ充分高耐圧強度が得られ、高温下においても軟
化することのない顕著な耐熱効果が得られること
が認められた。 このように、本発明の液状ガスケツトによれ
ば、優れた耐熱、耐圧、耐食性に加え、ガスケツ
ト被膜の強度が大となり、繊維は遠素を含まない
ため、用途の制限を受けることなく、信頼性の高
いガスケツトの提供が可能となる。
[Table] The liquid gasket used in Conventional Example AB is a commercially available one, so its composition is omitted. As shown in the table above, it was confirmed that the liquid gasket of [Invention Example 1] containing 15% carbonized fiber had high pressure resistance regardless of the temperature condition. In addition, even in the case of [Invention Example 2], which has a slightly lower carbonized fiber content of 10%, a sufficiently high pressure resistance strength is obtained compared to conventional example AB, and a remarkable heat resistance effect that does not soften even at high temperatures is obtained. It was recognized that this could be achieved. As described above, the liquid gasket of the present invention not only has excellent heat resistance, pressure resistance, and corrosion resistance, but also has a strong gasket coating, and since the fibers do not contain any electrolyte, the gasket is reliable without being restricted in its use. This makes it possible to provide gaskets with high resistance.

Claims (1)

【特許請求の範囲】[Claims] 1 10μm以下の径で0.5〜5mmの長さを有する炭
化繊維を充填補強材として5〜50%含有したこと
を特徴とする液状ガスケツト。
1. A liquid gasket characterized by containing 5 to 50% of carbonized fibers having a diameter of 10 μm or less and a length of 0.5 to 5 mm as a filling reinforcing material.
JP4090583A 1983-03-12 1983-03-12 Liquid gasket Granted JPS59166577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4090583A JPS59166577A (en) 1983-03-12 1983-03-12 Liquid gasket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4090583A JPS59166577A (en) 1983-03-12 1983-03-12 Liquid gasket

Publications (2)

Publication Number Publication Date
JPS59166577A JPS59166577A (en) 1984-09-19
JPH0259188B2 true JPH0259188B2 (en) 1990-12-11

Family

ID=12593521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4090583A Granted JPS59166577A (en) 1983-03-12 1983-03-12 Liquid gasket

Country Status (1)

Country Link
JP (1) JPS59166577A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548251A (en) * 1977-06-22 1979-01-22 Shinetsu Polymer Co Oil seal made of synthetic rubber and packing and like
JPS57105442A (en) * 1980-12-23 1982-06-30 Sakagami Seisakusho:Kk Filler-containing polytetrafluoroethylene molding powder and fluoroplastic molded product
JPS57190067A (en) * 1981-02-14 1982-11-22 Grace W R & Co Sealing composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548251A (en) * 1977-06-22 1979-01-22 Shinetsu Polymer Co Oil seal made of synthetic rubber and packing and like
JPS57105442A (en) * 1980-12-23 1982-06-30 Sakagami Seisakusho:Kk Filler-containing polytetrafluoroethylene molding powder and fluoroplastic molded product
JPS57190067A (en) * 1981-02-14 1982-11-22 Grace W R & Co Sealing composition

Also Published As

Publication number Publication date
JPS59166577A (en) 1984-09-19

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