JPH04160271A - Graphite sheet gasket member - Google Patents
Graphite sheet gasket memberInfo
- Publication number
- JPH04160271A JPH04160271A JP28819390A JP28819390A JPH04160271A JP H04160271 A JPH04160271 A JP H04160271A JP 28819390 A JP28819390 A JP 28819390A JP 28819390 A JP28819390 A JP 28819390A JP H04160271 A JPH04160271 A JP H04160271A
- Authority
- JP
- Japan
- Prior art keywords
- fluororubber
- expanded graphite
- graphite particles
- gasket member
- sheet 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 34
- 239000010439 graphite Substances 0.000 title claims abstract description 34
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000005060 rubber Substances 0.000 claims description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 229920001973 fluoroelastomer Polymers 0.000 abstract description 22
- 238000007789 sealing Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 10
- 238000000465 moulding Methods 0.000 abstract description 7
- 238000005470 impregnation Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract 2
- 238000003825 pressing Methods 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 description 6
- 229910052895 riebeckite Inorganic materials 0.000 description 6
- 229920000459 Nitrile rubber Polymers 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100342337 Caenorhabditis elegans klf-1 gene Proteins 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 101001012040 Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) Immunomodulating metalloprotease Proteins 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 235000011835 quiches Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、自動車エンジンのシリンダーへッドカパーや
配管用フランジのような静止部材間を密封するシール材
として使用される黒鉛質シート状ガスケット材に関する
ものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a graphite sheet gasket material used as a sealing material between stationary members such as cylinder head covers of automobile engines and piping flanges. It is something.
（従来の技術）
スチレン−ブタジェンゴム（８ＢＲ）やアクリロニトリ
ルブタジェンゴム（ＮＢＲ）％Ｏ−ｆムｆ。(Prior Art) Styrene-butadiene rubber (8BR) and acrylonitrile-butadiene rubber (NBR)% O-f.
アスベスト繊維と混練して加圧成形したアスベストジヨ
イントシートまたはアスベストビータシートが、自動車
及び産業機器の液体や気体を密封するシール材として用
いられている。また、上記した通常のゴムでは耐熱性ま
たは耐食性に問題がある用途においては、アスベスト繊
維等の他のフィラーまたは充てん材を加えないふっ素樹
脂またはふっ素ゴム単体が用いられている。Asbestos joint sheets or asbestos beater sheets, which are kneaded with asbestos fibers and pressure-molded, are used as sealing materials for sealing liquids and gases in automobiles and industrial equipment. Furthermore, in applications where the above-mentioned ordinary rubbers have problems in heat resistance or corrosion resistance, fluororesin or fluororubber alone is used without adding other fillers or fillers such as asbestos fibers.
さらに、天然黒鉛やキッシュ黒鉛を硫酸及び硝酸の混液
等に浸漬し、水洗、脱水後急熱して黒鉛層間を膨張させ
る等の方法によって得られる膨張黒鉛を加圧成形した可
とう性のある黒鉛シートも。Furthermore, flexible graphite sheets are made by pressure-molding expanded graphite obtained by immersing natural graphite or Quiche graphite in a mixture of sulfuric acid and nitric acid, washing with water, dehydrating, and then rapidly heating to expand between the graphite layers. too.
主として自動車エンジン用のガスケット材などに用いら
れている。It is mainly used as gasket material for automobile engines.
（発明が解決しようとする課題）
アスベストシートは、高強度で低価格であるという長所
があるが、繊維間に存在する空隙のため。(Problems to be Solved by the Invention) Asbestos sheets have the advantage of being high in strength and low in price, but because of the voids that exist between the fibers.
ゴム単体に比べるとシール性が劣り、また、 ＳＢＲや
ＮＢＲを３０１°量−程度含むため、耐熱性が劣る。さ
らにアスベストは人体に有害であるという最大の欠点が
ある。It has poor sealing properties compared to rubber alone, and because it contains about 301° of SBR and NBR, it has poor heat resistance. Another major disadvantage of asbestos is that it is harmful to the human body.
ふっ素樹脂は、耐熱性、耐食性に優れるが、圧縮率、−
復元率ともに小さく硬いため、シール性が悪く、締め付
は面圧を高くとる必要がある。ふつ素ゴムは、ふっ素樹
脂より若干耐熱性、耐食性に劣るが、ゴム弾性体である
ため低面圧でのシール性に優れるとともに、くり返して
使用することも可能である。Fluororesin has excellent heat resistance and corrosion resistance, but its compressibility and -
Since the recovery rate is small and hard, the sealing performance is poor and it is necessary to apply high surface pressure when tightening. Fluorine rubber has slightly lower heat resistance and corrosion resistance than fluororesin, but since it is a rubber elastic body, it has excellent sealing performance under low surface pressure and can be used repeatedly.
しかし柔らか過ぎて変形し易いため、高圧の気体や液体
をシールすることができない。′また。ふっ素樹脂及び
ふっ素ゴムのいずれも、ＮＢＲやＳＢＲ等の通常のゴム
、フェノール樹脂、エポキシ樹脂等の通常の樹脂に比べ
て極めて高価である物を含んでいないため耐熱性に優れ
、ま次９面状粒子が積み重なった構造を持つためシール
性にも優れ、高圧の液体や気体をシールできる適度な柔
らかさも有している。However, it is too soft and deforms easily, so it cannot seal high pressure gas or liquid. 'Also. Both fluorine resin and fluorine rubber do not contain substances that are extremely expensive compared to ordinary rubbers such as NBR and SBR, phenolic resins, and epoxy resins, so they have excellent heat resistance and are highly heat resistant. Because it has a structure of piled-up particles, it has excellent sealing properties and has the appropriate softness to seal high-pressure liquids and gases.
しかし、引つ張シ強度が数十ｋｇｆ／ｊザ程度と極めて
弱いため取り扱い性が悪く、使用分野が制限されている
。However, its tensile strength is extremely low, on the order of several tens of kgf/j, so it is difficult to handle, and its field of use is limited.
本発明は、上記した問題を解決すべく検討した結果、耐
熱性、シール性９強度を総合して優れたシート状ガスケ
ット材を提供することを目的とする。As a result of studies to solve the above-mentioned problems, the present invention aims to provide a sheet-like gasket material that has excellent overall heat resistance and sealing strength.
（課題を解決するための手段）
本発明は、膨張黒鉛粒子６０〜９５重量部の中にふっ素
ゴムの５〜４０重量部を充てんした。かさ密度が０．７
６／ｃｍ３以上の黒鉛質シート状ガスケット材に関する
。(Means for Solving the Problems) In the present invention, 60 to 95 parts by weight of expanded graphite particles are filled with 5 to 40 parts by weight of fluororubber. Bulk density is 0.7
6/cm3 or more graphite sheet gasket material.
本発明において、膨張黒鉛及びふっ素ゴムは公知のもの
を使用し、加圧成形法もプレス法、ロール法等のいずれ
でも良く特に制限はない。ただし加圧成形するとき、ふ
っ素ゴムの硬化も同時に行う方が良いので、１５０℃以
上に加熱することが好ましい。In the present invention, known expanded graphite and fluororubber are used, and the pressure molding method may be a press method, a roll method, etc., and there are no particular limitations. However, when performing pressure molding, it is better to cure the fluororubber at the same time, so it is preferable to heat it to 150° C. or higher.
膨張黒鉛粒子を圧縮成形したシートの持つ耐熱性及びシ
ール性といった特長を発現させるためには、膨張黒鉛粒
子を材料全体の６０〜９５重量部として主たる構成材料
とする必要がある。また。In order to exhibit the heat resistance and sealing properties of a sheet formed by compression molding expanded graphite particles, it is necessary to use expanded graphite particles as the main constituent material in an amount of 60 to 95 parts by weight of the entire material. Also.
シート強度、シール性をさらに向上させるために加える
ふっ素ゴムは、５〜４０重量部加えることによって効果
が出現できる。ふっ素樹脂は硬いためシートの可とう性
を低下させ、ＮＢ几や８ＢＲ等は耐熱性を悪くするため
、膨張黒鉛粒子間を充てんする材料としてはふっ素ゴム
が最も適している。The effect can be obtained by adding 5 to 40 parts by weight of fluororubber to further improve sheet strength and sealing properties. Since fluororesin is hard, it reduces the flexibility of the sheet, and NB and 8BR have poor heat resistance, so fluororubber is the most suitable material for filling between expanded graphite particles.
膨張黒鉛粒子間にふっ素ゴムを充てんする方法Ｋｌｆ−
１．混合、混練ま次ハふっ素ゴム溶液やふっ素ゴムエマ
ルジョンによる含浸等の方法があるが。Method of filling fluororubber between expanded graphite particles Klf-
1. There are methods such as mixing, kneading, and impregnation with a fluororubber solution or fluororubber emulsion.
成形前の膨張黒鉛粒子は極めて脆く弱いので、混合、混
練すると粒子が破壊してしまい、成形したシートの強度
が低下する。したがって含浸法によりふっ素ゴムを充て
んする方法が好ましい。Expanded graphite particles before molding are extremely brittle and weak, so when mixed and kneaded, the particles break and the strength of the molded sheet decreases. Therefore, a method of filling with fluororubber by an impregnation method is preferred.
ふっ素ゴムを含有させた膨張黒鉛粒子は分散媒を揮散さ
せた後、かさ密度が０．７ ｋｇ／ａｎ”以上になるよ
うに成形してガスケット材とされる。かさ密度が０゜７
ｋｇ／ｃｍ”未満では強度が小さくなり、実用に供しな
い。Expanded graphite particles containing fluororubber are used as a gasket material by being molded to have a bulk density of 0.7 kg/an" or more after volatilizing the dispersion medium.The bulk density is 0.7 kg/an" or more.
If it is less than "kg/cm", the strength will be low and it will not be put to practical use.
（実施例）
ふっ素ゴムラテックス（ダイキン工業■裂９品番ＧＬ−
１５２）中にがさ密度０．００５６ ／ａｎ”の膨張黒
鉛粒子（日立化成工業■裂）を光分浸漬し。(Example) Fluororubber latex (Daikin Industries ■Crack 9 product number GL-
152) Expanded graphite particles (Hitachi Chemical Co., Ltd.) with a bulk density of 0.0056/an'' were immersed in light.
７０℃で水分を蒸発させるとともに、５ＫＰａの圧力で
予備成形した。ラテックスの濃度を調製することによっ
てふっ素ゴム配合量を変更することができるか９本実施
例ではふっ素ゴム配合量を１０重量部及び膨張黒鉛粒子
９０重量部とし念。続い ゛てゴムが配合され次膨張
黒鉛粒子の予備成形体を。Water was evaporated at 70° C. and preformed at a pressure of 5 KPa. Is it possible to change the amount of fluororubber blended by adjusting the concentration of latex?9 In this example, the amount of fluororubber blended was 10 parts by weight and 90 parts by weight of expanded graphite particles. Next, rubber is compounded to form a preformed expanded graphite particle.
１７０℃、５０ＭＰａで１０分間熱圧成形して、かさ密
度１．５ｇ／−の黒鉛質シート状ガスケット材を作製し
念。A graphite sheet gasket material with a bulk density of 1.5 g/- was prepared by hot-pressing at 170° C. and 50 MPa for 10 minutes.
ふっ素ゴムを配合しない黒鉛シートの引っ張り強度は６
ＭＰａであつ次のに対し、本実施例により作製した黒鉛
質シートの引っ張り強度は１５ＭＰａとなった。また、
１００℃に加熱したときの応力緩和率（ＡＳＴＭ Ｆ
−３８法）は、７チ以下であり、ふっ素ゴムを配合しな
いものと同じレベルであった。さらに、＊め付は圧力３
ＭＰａでシールできる水圧−配合しないものの０．７
ＭＰａからＩＭＰａに向上していた。The tensile strength of graphite sheet without fluoro rubber is 6
The tensile strength of the graphite sheet produced according to this example was 15 MPa, whereas the tensile strength was 15 MPa. Also,
Stress relaxation rate when heated to 100°C (ASTM F
-38 method), it was 7 or less, which was the same level as that without blending fluororubber. Furthermore, *fitting is at a pressure of 3
Water pressure that can seal at MPa - 0.7 without blending
It had improved from MPa to IMPa.
ふっ素ゴムを配合しない黒鉛シートは、油、水。Graphite sheets that do not contain fluoro rubber can be used with oil or water.
酸に浸漬しておくとこれらを吸うことにより強度が１／
３以下に低下するという欠点があるが、この点も実施例
のものは完全に解消されていた。すなわち、１００℃の
ＡＳＴＭＮＱ３オイル（ゴム膨潤オイル）に１日浸漬し
た場合、室温で１０チ硫酸に１日浸漬した場合のいずれ
でも、１０チ以上の強度低下は認められなかった。If soaked in acid, the strength will be reduced by 1/2 by absorbing these substances.
Although there is a drawback that the value decreases to 3 or less, this point was also completely resolved in the example. That is, no strength reduction of 10° or more was observed in either case of immersion in ASTM NQ3 oil (rubber swelling oil) at 100°C for 1 day or in 10°C of sulfuric acid at room temperature.
（発明の効果）
本発明の黒鉛質シート状ガスケット材は、膨張黒鉛粒子
のみからなる従来のガスケット材に比べて強度及びシー
ル性に優れ、耐熱性は同等となる。(Effects of the Invention) The graphite sheet gasket material of the present invention has superior strength and sealing properties, and has the same heat resistance as conventional gasket materials made only of expanded graphite particles.
ま念、耐油、耐酸性も大幅に改善されている。Furthermore, oil resistance and acid resistance have also been significantly improved.
代理人 弁理士 若 林 邦 彦Agent Patent Attorney Kunihiko Wakabayashi
Claims (1)
〜４０重量部を充てんした、かさ密度が０．７ｇ／ｃｍ
＾３以上の黒鉛質シート状ガスケット材。1. 5 parts of fluorine rubber in 60 to 95 parts by weight of expanded graphite particles
Filled with ~40 parts by weight, bulk density is 0.7 g/cm
Graphite sheet gasket material of ^3 or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28819390A JPH04160271A (en) | 1990-10-25 | 1990-10-25 | Graphite sheet gasket member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28819390A JPH04160271A (en) | 1990-10-25 | 1990-10-25 | Graphite sheet gasket member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04160271A true JPH04160271A (en) | 1992-06-03 |
Family
ID=17727021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28819390A Pending JPH04160271A (en) | 1990-10-25 | 1990-10-25 | Graphite sheet gasket member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04160271A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08319473A (en) * | 1995-05-26 | 1996-12-03 | Nippon Valqua Ind Ltd | Joint sheet |
| CN1038844C (en) * | 1993-04-05 | 1998-06-24 | 日本皮拉工业株式会社 | Sealing filler |
| US6613252B2 (en) | 2001-06-01 | 2003-09-02 | Advanced Energy Technology Inc. | Molding of materials from graphite particles |
| JP2009527712A (en) * | 2006-02-20 | 2009-07-30 | エドワーズ リミテッド | sticker |
| JP2020517763A (en) * | 2017-04-17 | 2020-06-18 | ベイカー ヒューズ， ア ジーイー カンパニー， エルエルシー | Acid-resistant carbon composite, method for producing the same, and article formed therefrom |
-
1990
- 1990-10-25 JP JP28819390A patent/JPH04160271A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038844C (en) * | 1993-04-05 | 1998-06-24 | 日本皮拉工业株式会社 | Sealing filler |
| JPH08319473A (en) * | 1995-05-26 | 1996-12-03 | Nippon Valqua Ind Ltd | Joint sheet |
| US6613252B2 (en) | 2001-06-01 | 2003-09-02 | Advanced Energy Technology Inc. | Molding of materials from graphite particles |
| JP2009527712A (en) * | 2006-02-20 | 2009-07-30 | エドワーズ リミテッド | sticker |
| JP2020517763A (en) * | 2017-04-17 | 2020-06-18 | ベイカー ヒューズ， ア ジーイー カンパニー， エルエルシー | Acid-resistant carbon composite, method for producing the same, and article formed therefrom |
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