JPH0121084B2 - - Google Patents
Info
- Publication number
- JPH0121084B2 JPH0121084B2 JP59115278A JP11527884A JPH0121084B2 JP H0121084 B2 JPH0121084 B2 JP H0121084B2 JP 59115278 A JP59115278 A JP 59115278A JP 11527884 A JP11527884 A JP 11527884A JP H0121084 B2 JPH0121084 B2 JP H0121084B2
- Authority
- JP
- Japan
- Prior art keywords
- expanded graphite
- coating
- coating material
- graphite material
- talc
- 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
Links
- 239000011248 coating agent Substances 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 19
- 239000007770 graphite material Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 description 8
- 229910052623 talc Inorganic materials 0.000 description 8
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 7
- 239000000454 talc Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Description
【発明の詳細な説明】
(イ) 発明の技術分野
この発明は、たとえばパツキンやガスケツトの
ような密封部材あるいはシールテープ等に使用さ
れるような膨張黒鉛材に関し、さらに詳しくは膨
張黒鉛材を溶融弗素樹脂と無機粉体とを混合した
被覆材で被覆保護した膨張黒鉛材に関する。[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to an expanded graphite material used for sealing members such as packing and gaskets, or sealing tapes, and more specifically, to a method for melting the expanded graphite material. This invention relates to an expanded graphite material that is coated and protected with a coating material that is a mixture of fluororesin and inorganic powder.
(ロ) 発明の背景
従来、上述例の膨張黒鉛材は、耐熱性に加えて
適切な弾力性と柔軟性を有するため、密封部材に
あつては、特に適していることが知られている。(b) Background of the Invention Conventionally, it has been known that the expanded graphite material described above is particularly suitable for sealing members because it has appropriate elasticity and flexibility in addition to heat resistance.
しかし、この膨張黒鉛材は反面、強度的に脆い
性質を有しているため、輸送時、装着時あるいは
取扱い時等において、この膨張黒鉛材が割れた
り、欠けたりすることが多々発生し、取扱いに多
くの注意を払わねばならず、特に機械化によつて
装着操作する場合は、その機械の振動やロボツト
の把持力等によつて損傷しやすかつた。また、膨
張黒鉛材は本来耐食性のあるものであるが、強酸
に対しての耐食性が劣るばかりか、一旦機器装置
に装着されて使用されると取外し時には、機器装
置との接触対応面が焼付け等により付着するた
め、表面が一部剥がれて、再使用できない問題を
有していた。 However, on the other hand, this expanded graphite material has brittle properties, so it often cracks or chips during transportation, installation, or handling. In particular, when the mounting operation is mechanized, it is easy to be damaged by the vibrations of the machine, the gripping force of the robot, etc. In addition, although expanded graphite material is inherently corrosion resistant, not only does it have poor corrosion resistance against strong acids, but once it is attached to a device and used, when it is removed, the surface that comes into contact with the device may be baked or otherwise damaged. Because of the adhesion, part of the surface peels off, making it impossible to reuse it.
(ハ) 発明の目的
そこでこの発明は、外力による損傷、耐食性の
低下、使用時における摺動抵抗の増大および再使
用不可等の原因を一掃した膨張黒鉛材の提供を目
的とする。(c) Purpose of the Invention Therefore, the object of the present invention is to provide an expanded graphite material that eliminates the causes of damage due to external forces, decrease in corrosion resistance, increase in sliding resistance during use, and impossibility of reuse.
(ニ) 発明の要約
この発明は、膨張黒鉛表面の一部分ないし全部
の表面に、溶融弗素樹脂と無機粉体とが混合（ブ
レンド）されてなる被覆材を被覆した膨張黒鉛材
であることを特徴とするものであつて、この場
合、溶融弗素樹脂とは、パーフルオロアルコキシ
樹脂（PFA）、四フツ化エチレン〜エチレンヲ共
重合樹脂（ETFE）、フツ化ビニリデン樹脂
（PVdF）等であり、無機粉体とは、タルク、雲
母、シリカ等の無機材料からなる粉体を意味する
ものである。(d) Summary of the Invention This invention is characterized by an expanded graphite material in which a part or all of the expanded graphite surface is coated with a coating material made of a mixture (blend) of molten fluororesin and inorganic powder. In this case, the molten fluororesin includes perfluoroalkoxy resin (PFA), tetrafluoroethylene-ethylene copolymer resin (ETFE), vinylidene fluoride resin (PVdF), etc. The term "body" means a powder made of an inorganic material such as talc, mica, or silica.
(ホ) 発明の効果
この発明によれば、膨張黒鉛の表面を溶融弗素
樹脂と無機粉体とを混合してなる被覆材で被覆保
護してあるため、この膨張黒鉛材自体の強度が確
実に向上し、輸送時、装着時あるいは取扱い時に
振動や衝撃等の外的影響を受けても、不測に損傷
することがなくなり、取扱い性が向上する。(e) Effects of the Invention According to this invention, the surface of expanded graphite is coated and protected with a coating material made of a mixture of molten fluororesin and inorganic powder, so that the strength of the expanded graphite material itself is ensured. This improves the ease of handling by preventing unexpected damage even if the product is exposed to external influences such as vibration or impact during transportation, installation, or handling.
また、強酸に対しても、耐薬品性に良好な上述
の被覆材が対処するため、膨張黒鉛は常に保護さ
れた状態で使用されることになり、確実に耐食性
が向上する。さらに、この被覆材の持つ非粘着性
によつて、着脱使用しても表面が損われないた
め、再使用が可能となるだけでなく、低摩擦特性
によつて相手部材との摺動抵抗を低くでき、しか
も混合された無機粉体によつて被覆材自体の強度
が増すので、被覆材のはくりやむしれを解消で
き、摺動抵抗強度が高められて密封部材として特
に好適なものとなる。 Furthermore, since the above-mentioned coating material with good chemical resistance can withstand strong acids, the expanded graphite is always used in a protected state, and its corrosion resistance is reliably improved. Furthermore, due to the non-adhesive properties of this coating material, the surface will not be damaged even when it is attached and removed, making it possible to reuse it as well as reducing sliding resistance with mating parts due to its low friction properties. Moreover, the strength of the coating material itself is increased by the mixed inorganic powder, which eliminates peeling and peeling of the coating material, and increases the sliding resistance strength, making it particularly suitable as a sealing member. .
(ヘ) 発明の実施例
この発明の一実施例を以下図面に基づいて詳述
する。(F) Embodiment of the Invention An embodiment of the invention will be described in detail below based on the drawings.
図面は密封部材に使用される膨張黒鉛材を示
し、第１図において、この膨張黒鉛材１はたとえ
ば膨張黒鉛粉末を円板形の密封部材形状に成形し
た膨張黒鉛２と、この外周囲表面を被覆保護する
被覆材３とで内外の二重構造に形成したものであ
る。この被覆材３は、PFA50wt％［PFAとし
て、三井フロロケミカル株式会社製の商品名MP
―10を用いた。］とタルク50wt％［タルクとし
て、日本タルク株式会社製のものを用いた。］を
ブレンドしたものを用いた。なお、もともとタル
クは、ETFEと同様低摩擦材であるが、被覆材３
のようなタルクを配合することによつて、ETFE
のみのものに比較して、機械的強度（むしれに対
して）を３倍程度、高めることができる。また、
その被覆厚さは用途によつて異なるが、通常20〜
200μm程度に設定するのが適している。 The drawing shows an expanded graphite material used for a sealing member, and in FIG. It is formed into an inner and outer double structure with a covering material 3 for covering and protection. This coating material 3 contains 50 wt% PFA [as PFA, the product name is MP manufactured by Mitsui Fluorochemical Co., Ltd.
-10 was used. ] and talc 50wt% [talc manufactured by Nippon Talc Co., Ltd. was used. ] was used. Incidentally, talc is originally a low-friction material like ETFE, but the coating material 3
By blending talc such as
Mechanical strength (against peeling) can be increased by about 3 times compared to that of solid wood. Also,
The coating thickness varies depending on the application, but is usually 20~
It is suitable to set it to about 200μm.
これは、たとえば取扱い性のみを考慮した場合
は、20μm程度被覆するのが適しており、また孔
食を誘起するおそれのある場合は、50μm程度の
被覆厚さで解決でき、さらに強酸に対処するよう
な場合は、200μm程度被覆することで解決でき
る。 For example, if only handling ease is considered, a coating thickness of about 20 μm is appropriate, and if there is a risk of inducing pitting corrosion, a coating thickness of about 50 μm can be used. In such a case, it can be solved by covering it with a thickness of about 200 μm.
次に、その被覆手段の一例として、静電粉末塗
装を使用した場合を説明する。 Next, a case where electrostatic powder coating is used will be described as an example of the coating means.
これは、第２図に示すように、先ず円板形の密
封部材形状に設けた膨張黒鉛２を、500℃の高温
雰囲気中に30分間放置して空焼きした後、第３図
に示すように、前記被覆材３の粉体をその外表面
の全体に均一に吹付け、その後第４図に示すよう
に、300℃程度の高温雰囲気中に約20分間放置し
て焼成した後、自然冷却あるいは強制冷却して、
被覆作業は終了する。これにより所望の膨張黒鉛
材が得られる。 As shown in Fig. 2, first, expanded graphite 2 provided in the shape of a disc-shaped sealing member was left in a high-temperature atmosphere of 500°C for 30 minutes to be baked, and then as shown in Fig. 3. Then, as shown in Fig. 4, the powder of the coating material 3 is sprayed uniformly over the entire outer surface, and then, as shown in Fig. 4, it is left in a high temperature atmosphere of about 300°C for about 20 minutes to bake, and then allowed to cool naturally. Or force cooling
Covering work is completed. This provides the desired expanded graphite material.
なお、この発明では、膨張黒鉛２に被覆材３を
被覆する方法として、静電粉体塗装が好適な理由
は、無機粉体のブレンドが容易である点や均一な
被覆厚さのものが得られやすい点のためである。 In this invention, electrostatic powder coating is preferable as a method for coating expanded graphite 2 with coating material 3 because it is easy to blend inorganic powder and provides a uniform coating thickness. This is because it is easy to get caught.
このように構成された膨張黒鉛材は、膨張黒鉛
２の持つ耐熱性、弾力性および柔軟性と、被覆材
３の持つ種々の特性、たとえば耐薬品性、低摩擦
係数との双方の性能を発揮して高性能の密封部材
となり、しかも被覆形成によつて損傷し難くなる
ため、取扱いが確実に容易となる。 The expanded graphite material configured in this manner exhibits both the heat resistance, elasticity, and flexibility of the expanded graphite 2 and the various properties of the coating material 3, such as chemical resistance and low coefficient of friction. This results in a high-performance sealing member, and the coating makes it difficult to damage, making it easier to handle.
第５図〜第７図はこの発明の他の実施例を示
し、第５図は膨張黒鉛５２の接触対応すべき両端
面のみをETFE50wt％［ETFEとして、旭ガラス
株式会社製の商品名アフロンCOPを用いた。］と
シリカ50wt％とを混合してなる被覆材５３で再
使用可能に20〜50μm被覆保護したガスケツトと
しての膨張黒鉛材５１を示し、シリカを配するこ
とによつて座面のフローやすべりを押えることが
できる。第６図はステムトルク用に膨張黒鉛６２
の内周面のみをETFE20wt％とタルク80wt％と
を混合してなる被覆材６３で20μm被覆保護して
摺動部の摩擦抵抗の低減を図つたバルブ用パツキ
ンとして好適な膨張黒鉛材６１を示し、また第７
図は膨張黒鉛材を利用した渦巻きガスケツト７１
のフイラー７２にETFE50wt％とタルク20wt％
およびシリカ30wt％を混合してなる被覆材７３
を20μm被覆保護して、作業性の向上を図つた使
用例を示す。 5 to 7 show other embodiments of the present invention. In FIG. 5, only both end faces of the expanded graphite 52 that should be in contact are 50wt% ETFE [ETFE], manufactured by Asahi Glass Co., Ltd. under the trade name Afron COP. was used. ] and 50 wt% silica are used as a gasket to prevent flow and slippage on the seat surface. It can be held down. Figure 6 shows expanded graphite 62 for stem torque.
An expanded graphite material 61 suitable as a valve packing is shown in which only the inner peripheral surface of the material is covered with a coating material 63 made of a mixture of 20 wt% ETFE and 80 wt% talc to a thickness of 20 μm to reduce frictional resistance of sliding parts. , also the seventh
The figure shows a spiral gasket 71 using expanded graphite material.
Filler 72 with ETFE 50wt% and talc 20wt%
Coating material 73 made by mixing silica and 30wt%
An example of use is shown in which a 20μm coating is used to improve workability.
なお、この発明では、被覆材にブレンドされる
無機粉体の配合量は、10〜80wt％の範囲が好ま
しい。これは無機粉体が10wt％未満になると、
溶融弗素樹脂のみの影響が出やすく、また、
80wt％をこえると、溶融弗素樹脂の利点が生か
せなくなるためである。 In the present invention, the amount of inorganic powder blended into the coating material is preferably in the range of 10 to 80 wt%. This means that when the inorganic powder content is less than 10wt%,
It is easy to be affected only by molten fluororesin, and
This is because if it exceeds 80wt%, the advantages of molten fluororesin cannot be utilized.
図面はこの発明の一実施例を示し、第１図は密
封部材に使用される膨張黒鉛材の縦断面図、第２
図〜第４図はその製作工程を示す説明図、第５図
〜第７図はこの発明の他の実施例を示す縦断面図
である。
１，５１，６１……膨張黒鉛材、２，５２，６
２……膨張黒鉛、３，５３，６３，７３……被覆
材、７１……渦巻きガスケツト、７２……フイラ
ー。
The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of expanded graphite material used for the sealing member, and FIG.
4 to 4 are explanatory diagrams showing the manufacturing process, and FIGS. 5 to 7 are longitudinal sectional views showing other embodiments of the present invention. 1,51,61...Expanded graphite material, 2,52,6
2... Expanded graphite, 3, 53, 63, 73... Covering material, 71... Spiral gasket, 72... Filler.
Claims (1)
とを混合してなる被覆材を被覆したことを特徴と
する 膨張黒鉛材。[Scope of Claims] 1. An expanded graphite material characterized in that the surface of expanded graphite is coated with a coating material made of a mixture of molten fluororesin and inorganic powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59115278A JPS60260415A (en) | 1984-06-05 | 1984-06-05 | Expanded graphite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59115278A JPS60260415A (en) | 1984-06-05 | 1984-06-05 | Expanded graphite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60260415A JPS60260415A (en) | 1985-12-23 |
| JPH0121084B2 true JPH0121084B2 (en) | 1989-04-19 |
Family
ID=14658697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59115278A Granted JPS60260415A (en) | 1984-06-05 | 1984-06-05 | Expanded graphite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60260415A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502599A (en) * | 2011-10-27 | 2012-06-20 | 南通三圣石墨设备科技股份有限公司 | Perfluoroalkoxy graphite material and production method thereof |
| JP6124751B2 (en) * | 2013-09-27 | 2017-05-10 | イビデン株式会社 | Method for producing carbon-coated graphite material |
| JP2015129532A (en) * | 2014-01-06 | 2015-07-16 | 日本ピラー工業株式会社 | Gland packing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5282912A (en) * | 1975-12-31 | 1977-07-11 | Nippon Carbon Co Ltd | Flexible carbon sliders |
| JPS5756512A (en) * | 1980-09-17 | 1982-04-05 | Nippon Ester Co Ltd | Hollow fiber and spinneret therefor |
-
1984
- 1984-06-05 JP JP59115278A patent/JPS60260415A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5282912A (en) * | 1975-12-31 | 1977-07-11 | Nippon Carbon Co Ltd | Flexible carbon sliders |
| JPS5756512A (en) * | 1980-09-17 | 1982-04-05 | Nippon Ester Co Ltd | Hollow fiber and spinneret therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60260415A (en) | 1985-12-23 |
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