JPH11278821A - Flexible graphite sheet and sheet-like composite material - Google Patents
Flexible graphite sheet and sheet-like composite materialInfo
- Publication number
- JPH11278821A JPH11278821A JP10080060A JP8006098A JPH11278821A JP H11278821 A JPH11278821 A JP H11278821A JP 10080060 A JP10080060 A JP 10080060A JP 8006098 A JP8006098 A JP 8006098A JP H11278821 A JPH11278821 A JP H11278821A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- graphite
- sheet
- flexible graphite
- mixed
- 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
Landscapes
- Carbon And Carbon Compounds (AREA)
- Sealing Material Composition (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はシール材として有用
な、可とう性黒鉛シート及びこれを用いたシート状複合
材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible graphite sheet useful as a sealing material and a sheet-like composite material using the same.
【０００２】[0002]
【従来の技術】従来、自動車及びオートバイのエンジン
などのように高温にさらされる場所のシール材として
は、耐熱性、可とう性、経済性を備えたアスベスト材が
主流であった。しかし、発ガン性の問題からアスベスト
製シール材は減少し、替わって耐熱性有機繊維などを使
用したシール材などが開発されたが、コスト等に問題を
残している。2. Description of the Related Art Conventionally, asbestos materials having heat resistance, flexibility, and economy have been mainly used as seal materials for places exposed to high temperatures such as engines of automobiles and motorcycles. However, the use of asbestos-based seal materials has decreased due to the problem of carcinogenicity, and seal materials using heat-resistant organic fibers and the like have been developed instead. However, problems remain in cost and the like.
【０００３】そこで、安価な黒鉛に酸処理を施し高温加
熱することで可とう性が付与された、いわゆる膨張黒鉛
をシール材層とし、金属板を芯材として使用することで
安価で、優れたシール性と耐熱性を有したバランスの良
いシール材を開発されている。しかし、上記シール材は
長期間使用すると、シール相手材（金属）と貼り付きを
起こし、シール材の交換時及びエンジン等の分解時に問
題となり、貼り付き発生のない改良シール材が強く求め
られている。[0003] Therefore, by using an inexpensive graphite which has been subjected to an acid treatment and is heated at a high temperature to have flexibility, so-called expanded graphite is used as a sealing material layer and a metal plate is used as a core material so that it is inexpensive and excellent. A well-balanced sealing material having sealability and heat resistance has been developed. However, if the sealing material is used for a long period of time, it will stick to the sealing partner material (metal), causing a problem when replacing the sealing material and disassembling the engine and the like. I have.
【０００４】これは、シール材中に残存した酸性物質が
相手材（金属）の錆び発生の要因となるためと考えられ
る。この酸性物質の除去方法としては、シール材表面を
バーナ等で高温状態にして、酸性物質を分解除去する方
法が考えられるが、シール材の中心付近の酸性物質まで
は、除去できない。また、シール材表面を樹脂等で被覆
し酸性物質と相手材との接触を妨げることも考えられる
が、この場合、シール材表面が硬くなりシール材として
の効果が大幅に低減する。[0004] This is considered to be because acidic substances remaining in the sealing material cause rusting of the mating material (metal). As a method for removing the acidic substance, a method of decomposing and removing the acidic substance by setting the surface of the sealing material to a high temperature state with a burner or the like is considered. However, the acidic substance near the center of the sealing material cannot be removed. It is also conceivable that the surface of the sealing material is covered with a resin or the like to prevent contact between the acidic substance and the counterpart material. However, in this case, the surface of the sealing material is hardened, and the effect of the sealing material is greatly reduced.
【０００５】[0005]
【発明が解決しようとする課題】請求項１、２及び３記
載の発明は、上記問題に鑑み、優れたシール性と耐熱性
を有したバランスの良いシール材であって、相手材（金
属）との貼り付き発生の殆どないシール材として有用
な、可とう性黒鉛シートを提供するものである。また請
求項４記載の発明は、優れたシール性と耐熱性を有した
バランスの良いシール材であって、相手材（金属）との
貼り付き発生の殆どないシール材として有用な、シート
状複合材料を提供するものである。SUMMARY OF THE INVENTION In view of the above problems, the invention according to claims 1, 2 and 3 is a well-balanced sealing material having excellent sealing properties and heat resistance. The present invention provides a flexible graphite sheet useful as a sealing material that hardly causes sticking to the sheet. The invention according to claim 4 is a sheet-like composite material which is a well-balanced sealing material having excellent sealing properties and heat resistance, and which is useful as a sealing material with almost no sticking to a mating material (metal). Provide materials.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、黒鉛を酸性
物質で処理して得られる膨張黒鉛と亜鉛を含んでなる可
とう性黒鉛シートに関する。また本発明は、前記の亜鉛
が、膨張黒鉛中に分散されてなる可とう性黒鉛シートに
関する。また本発明は、前記の亜鉛が、膨張黒鉛のシー
ト上に溶射されてなる可とう性黒鉛シートに関する。さ
らに本発明は、芯材層と、その片面又は両面に貼り合わ
された前記の可とう性黒鉛シートからなるシール材層と
を有してなるシート状複合材料に関する。SUMMARY OF THE INVENTION The present invention relates to a flexible graphite sheet comprising expanded graphite and zinc obtained by treating graphite with an acidic substance. The present invention also relates to a flexible graphite sheet in which the zinc is dispersed in expanded graphite. The present invention also relates to a flexible graphite sheet obtained by spraying the zinc on a sheet of expanded graphite. Further, the present invention relates to a sheet-like composite material having a core material layer and a sealing material layer made of the above-mentioned flexible graphite sheet bonded to one or both surfaces thereof.
【０００７】[0007]
【発明の実施の形態】本発明において、黒鉛を酸性物質
で処理して得られる膨張黒鉛自体は、一般に知られてお
り、例えば次のようにして製造される。原料とする黒鉛
としては、天然黒鉛、キッシュ黒鉛、熱分解黒鉛等の高
度に結晶が発達した黒鉛が好ましいものとして挙げられ
る。得られる特性と経済性のバランスからは天然黒鉛が
好ましい。用いる天然黒鉛としては、特に制限はなく、
Ｆ４８Ｃ（日本黒鉛(株)製）、Ｈ−５０（中越黒鉛(株)
製）等の市販品を用いることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, expanded graphite itself obtained by treating graphite with an acidic substance is generally known, and is produced, for example, as follows. As the graphite used as a raw material, graphite having a high degree of crystal development such as natural graphite, quiche graphite, and pyrolytic graphite is preferable. Natural graphite is preferred from the viewpoint of the balance between the obtained properties and economy. The natural graphite used is not particularly limited.
F48C (Nippon Graphite Co., Ltd.), H-50 (Chuetsu Graphite Co., Ltd.)
Commercially available products such as A.I.
【０００８】黒鉛の処理に用いられる、酸性物質として
は、硫酸、硝酸、硫酸と硝酸との混液、硫酸と過酸化水
素水との混液等の強酸性の溶液が好ましいものとして挙
げられる。膨張黒鉛とするための処理方法としては、例
えば、前記黒鉛を前記酸性物質の溶液に浸漬処理して、
黒鉛層間化合物を生成させ、ついで、水洗してから急速
加熱して、黒鉛結晶のｃ軸方向を膨張処理する方法が挙
げられる。これにより、虫状形で圧縮特性を有する膨張
黒鉛を得ることができる。The acidic substance used for the treatment of graphite is preferably a strongly acidic solution such as sulfuric acid, nitric acid, a mixed solution of sulfuric acid and nitric acid, and a mixed solution of sulfuric acid and hydrogen peroxide solution. As a processing method for forming expanded graphite, for example, by immersing the graphite in a solution of the acidic substance,
A method of generating a graphite intercalation compound, then washing with water and then rapidly heating to expand the c-axis direction of the graphite crystal. This makes it possible to obtain an insect-like expanded graphite having compressive properties.
【０００９】本発明においては、前記膨張黒鉛と共に亜
鉛を使用するが、この理由は、可とう性を有した酸処理
黒鉛と相手材（鋳鉄）との貼り付きを発生させる過酷な
条件下（高温多湿）で、亜鉛は、水分と炭酸ガスにより
塩基性炭酸亜鉛の被膜を生じさせ、この膜が相手材との
貼り付きを防ぐこと、また亜鉛と鉄のイオン化傾向の違
いを利用して酸処理黒鉛中に残存する酸成分によって引
き起こされる相手材（鋳鉄）の錆びを低減させ貼り付き
を防ぐと考えられるためである。In the present invention, zinc is used together with the expanded graphite, because zinc is used under the severe conditions (sticking at high temperature) that causes sticking between the acid-treated graphite having flexibility and the counterpart material (cast iron). High humidity) causes zinc to form a film of basic zinc carbonate due to moisture and carbon dioxide gas, preventing this film from sticking to the mating material and acid treatment using the difference in ionization tendency between zinc and iron. This is because it is considered that the rust of the partner material (cast iron) caused by the acid component remaining in the graphite is reduced and sticking is prevented.
【００１０】本発明の可とう性黒鉛シートにおいて、亜
鉛を含ませる方法は特に制限はないが、好ましい方法と
して、２つの方法がある。１つの方法は、亜鉛を膨張黒
鉛中に分散させる方法であり、もう１つの方法は、亜鉛
を膨張黒鉛のシート上に溶射する方法である。The method of incorporating zinc in the flexible graphite sheet of the present invention is not particularly limited, but there are two preferred methods. One method is to disperse zinc in the expanded graphite, and the other is to spray zinc on a sheet of expanded graphite.
【００１１】亜鉛を膨張黒鉛中に分散させるには、亜鉛
を膨張黒鉛に混合すればよい。混合する亜鉛の形状に特
に制限はないが、耐貼り付き性を考慮すると繊維状及び
粉状が好ましい。繊維状の場合、太さが０．１〜１．５
mmで長さが０．５〜２０mmのものが好ましく、また紛状
の場合、その平均粒子径が１〜１００μｍのものが好ま
しく、５〜５０μｍのものが好ましい。In order to disperse zinc in expanded graphite, zinc may be mixed with expanded graphite. The shape of the zinc to be mixed is not particularly limited, but fibrous and powdery are preferable in consideration of sticking resistance. In the case of fibrous, the thickness is 0.1 to 1.5
mm and a length of 0.5 to 20 mm are preferred, and in the case of a powder, the average particle size is preferably 1 to 100 μm, and more preferably 5 to 50 μm.
【００１２】亜鉛の混合量は要求特性に応じて考慮さ
れ、特に制限はないが、膨張黒鉛１００重量部に対し５
００〜２５重量部が好ましく、４００〜５０重量部がよ
り好ましい。亜鉛の混合量が５００重量部を超えると酸
処理黒鉛との均一混合が困難となると共にシール性が低
下する傾向にあり、２５重量部未満の場合貼り付き防止
効果が低下する傾向にある。膨張黒鉛と亜鉛の混合方法
に特に制限はないが、酸処理黒鉛を熱処理（例えば、７
００℃〜８００℃で５分程度）する前に混合すること
が、相手材との貼り付きを考慮すると好ましい。混合の
装置は特に制限はなく、ヘンシェルミキサー、シェイカ
ー等の装置を用いることができる。その後圧延し、シー
ト状に加工することにより、本発明の可とう性黒鉛シー
トが得られる。The mixing amount of zinc is taken into consideration according to the required characteristics, and is not particularly limited.
The amount is preferably from 25 to 25 parts by weight, more preferably from 400 to 50 parts by weight. If the mixing amount of zinc exceeds 500 parts by weight, it becomes difficult to uniformly mix with the acid-treated graphite, and the sealing property tends to decrease. If it is less than 25 parts by weight, the effect of preventing sticking tends to decrease. There is no particular limitation on the method of mixing the expanded graphite and zinc.
It is preferable to mix the mixture before it is performed at 00 ° C. to 800 ° C. for about 5 minutes in consideration of sticking to a partner material. The mixing device is not particularly limited, and a device such as a Henschel mixer or a shaker can be used. Thereafter, the sheet is rolled and processed into a sheet to obtain the flexible graphite sheet of the present invention.
【００１３】亜鉛を溶射する方法としては、膨張黒鉛を
高温で熱処理し可とう性を与えシート状に加工した後、
その上部に亜鉛溶射する方法が好ましい。溶射の方法に
特に制限はなく、亜鉛を溶解して一般の装置、方法を用
いて溶射される。溶射によって形成される亜鉛層の厚さ
は特に制限はないが、１〜２０μｍが好ましく、３〜１
５μｍがより好ましい。亜鉛層の厚さが１μｍ未満では
貼り付き防止の効果が低下する傾向にあり、２０μｍを
超えるとシール性等が低下する傾向にあると共に、亜鉛
量が増しコスト高になる傾向にある。[0013] As a method of spraying zinc, expanded graphite is heat-treated at a high temperature to give flexibility and is processed into a sheet.
The method of spraying zinc on the upper part is preferable. There is no particular limitation on the method of thermal spraying, and zinc is dissolved and thermal spraying is performed using a general apparatus and method. The thickness of the zinc layer formed by thermal spraying is not particularly limited, but is preferably 1 to 20 μm, and 3 to 1 μm.
5 μm is more preferred. If the thickness of the zinc layer is less than 1 μm, the effect of preventing sticking tends to decrease, and if it exceeds 20 μm, the sealability and the like tend to decrease, and the amount of zinc increases and the cost tends to increase.
【００１４】可とう性黒鉛シートの厚さは特に制限はな
いが、シール性の点で通常、０．１〜３．０mmに圧延し
シート状とされる。本発明のシート状複合材料は、芯材
層と、その片面又は両面に貼り合わされた、前記の可と
う性黒鉛シートからなるシール材層とを含有する。芯材
層の材質としては、通常金属が用いられ、通常鋼板やス
テンレスが一般的である。芯材層へのシール材の積層
は、特に制限はないが、例えば接着剤を介してロールま
たはプレス等で行うことができる。使用する接着剤は特
に制限はなく、例えば、フェノール樹脂、エポキシ樹脂
等の熱硬化性樹脂を主成分としたものが、耐熱性の点で
好ましい。Although the thickness of the flexible graphite sheet is not particularly limited, it is usually rolled to 0.1 to 3.0 mm to obtain a sheet from the viewpoint of sealing properties. The sheet-like composite material of the present invention contains a core material layer and a sealing material layer made of the above-mentioned flexible graphite sheet and bonded to one or both surfaces thereof. As the material of the core material layer, a metal is usually used, and a steel plate or stainless steel is generally used. The lamination of the sealing material on the core layer is not particularly limited, but can be performed by, for example, a roll or a press via an adhesive. The adhesive to be used is not particularly limited, and for example, an adhesive containing a thermosetting resin such as a phenol resin and an epoxy resin as a main component is preferable in terms of heat resistance.
【００１５】芯材層の厚さは特に制限はないが、シール
性の点で０．１〜１mmとすることが好ましい。また芯材
層とシール材層を含むシート状複合材料全体の厚さは特
に制限はないが、シール性及び加工性の点から、０．２
〜３mmであることが好ましい。上記の如く作製したシー
ト状複合材料を、所定形状に加工することで各種ガスケ
ット、シール等を得ることができる。加工法としては特
に制限はなく、打ち抜き加工等の方法が用いられる。The thickness of the core layer is not particularly limited, but is preferably 0.1 to 1 mm from the viewpoint of sealing properties. Further, the thickness of the entire sheet-like composite material including the core material layer and the seal material layer is not particularly limited.
It is preferably about 3 mm. Various gaskets, seals, and the like can be obtained by processing the sheet-shaped composite material produced as described above into a predetermined shape. There is no particular limitation on the processing method, and a method such as punching is used.
【００１６】[0016]
【実施例】次に実施例を説明する。 実施例１ （１）亜鉛を使用した可とう性黒鉛シートの製造方法 硫酸（濃度９９重量％）１５０ｇと硝酸５０ｇ（濃度９
９重量％）を１リットルのガラスフラスコに入れ、この
ものに黒鉛（Ｆ４８Ｃ、日本黒鉛(株)製）７０ｇを配合
し、ガラスのかく伴羽根を取付けたモータで４０rpmで
１０分間混合した。混合終了後、濾過で酸化黒鉛と酸成
分を分離し、多量の水で酸化黒鉛の表面に付着した余分
な酸を洗浄した。その後、水洗した酸化黒鉛をバットに
移し１０２℃に昇温した乾燥器に約４時間乾燥した。得
られた酸化黒鉛の水分含有量は５．２％であった。次に
得られた酸化黒鉛２０ｇに直径０．５mm、長さ７mmの亜
鉛線チョップ２０ｇを配合し、酸化黒鉛が崩れないよう
に均一に乾式ブレンド（ビニールの袋を用いた）し、８
００℃で１０秒間熱処理を行い亜鉛が混合された可とう
性を有した膨張黒鉛を得た。上記した亜鉛混合膨張黒鉛
の一部を、４cm×４cmの金型に均一に充填し厚さが２mm
になるようにプレス成形を行い亜鉛を使用した可とう性
黒鉛シートを製造した。Next, an embodiment will be described. Example 1 (1) Method for producing flexible graphite sheet using zinc 150 g of sulfuric acid (concentration 99% by weight) and 50 g of nitric acid (concentration 9)
(9% by weight) was placed in a 1-liter glass flask, and 70 g of graphite (F48C, manufactured by Nippon Graphite Co., Ltd.) was mixed with the mixture and mixed at 40 rpm for 10 minutes by a motor equipped with glass wings. After the mixing was completed, the graphite oxide and the acid component were separated by filtration, and excess acid adhering to the surface of the graphite oxide was washed with a large amount of water. Thereafter, the washed graphite oxide was transferred to a vat and dried in a dryer heated to 102 ° C. for about 4 hours. The water content of the obtained oxidized graphite was 5.2%. Next, 20 g of the obtained graphite oxide was mixed with 20 g of a zinc wire chop having a diameter of 0.5 mm and a length of 7 mm, and uniformly dry-blended (using a plastic bag) so that the graphite oxide did not collapse.
A heat treatment was performed at 00 ° C. for 10 seconds to obtain flexible expanded graphite mixed with zinc. A part of the above zinc mixed expanded graphite is uniformly filled in a mold of 4 cm × 4 cm and the thickness is 2 mm.
Press molding was performed to obtain a flexible graphite sheet using zinc.
【００１７】（２）貼り付き性試験 ボルト絞めできる縦４cm、横４cm、厚さ１cmの鋳鉄（面
粗度：５Ｒｚ）２枚に、（１）のプレス成形シートを鋏
面圧が均一に７MPaになるように、ボルト絞めを行っ
た。このものを、湿度９０％、温度２５℃に調整した容
器に入れ２４時間放置し、治具表面の水分を拭き取りボ
ルトを外しシート面と金属面の貼り付き状態を確認し
た。(2) Adhesion test A pair of cast iron (surface roughness: 5Rz) of 4 cm in length, 4 cm in width, and 1 cm in thickness, which can be bolted, and the press-formed sheet of (1), with a uniform scissor pressure of 7 MPa. Bolt was tightened so that This was placed in a container adjusted to a humidity of 90% and a temperature of 25 ° C., and allowed to stand for 24 hours. The surface of the jig was wiped off, the bolt was removed, and the state of sticking between the sheet surface and the metal surface was confirmed.
【００１８】（３）シール性試験 前記可とう性黒鉛シートを外径５０mm、内径３４mmのド
ーナッツ状の専用金型でプレス成形し、厚さ２mmのシー
ル性測定用サンプルを得た。このサンプルを、前記サン
プル形状に合わせて作成された自家製のシール性測定用
治具の２部品間にセットし、該治具の２部品同士を固定
するために設けられた４本のナットをトルクレンチで２
０kg・cm、３０kg・cm、４０kg・cmの３段階に分けて締め
付け、各段階で治具部品の間のシールの側面をよく洗浄
し、シール漏れをチェックする現像液を付着させた。各
段階で、治具の内部に存在する空間に不凍液を定量まで
注ぎ、エアホースを用いて前記不凍液を初期圧力２kg/c
m2から３０分毎に０．５kg/cm2ずつ昇圧し、６．５kg/c
m2迄漏れのないことを確認した。(3) Sealability test The above flexible graphite sheet was press-molded with a special donut-shaped mold having an outer diameter of 50 mm and an inner diameter of 34 mm to obtain a 2 mm-thick sealability measurement sample. This sample is set between two parts of a homemade jig for measuring sealing properties made according to the sample shape, and four nuts provided to fix the two parts of the jig are set. 2 with a wrench
Tightening was performed in three stages of 0 kg · cm, 30 kg · cm, and 40 kg · cm. At each stage, the side surface of the seal between the jig parts was thoroughly washed, and a developer for checking for seal leakage was attached. At each stage, pour the antifreeze into the space inside the jig up to a certain amount and use an air hose to apply the antifreeze at an initial pressure of 2 kg / c.
boosted by 0.5 kg / cm 2 from the m 2 every 30 minutes, 6.5 kg / c
It was confirmed that there was no leakage up to m 2 .
【００１９】実施例２ （１）亜鉛を使用した可とう性黒鉛シートの製造方法 亜鉛線チョップを使用しなかった以外は、実施例１
（１）と同じ方法で可とう性黒鉛シートを得た。得られ
たシートに亜鉛溶射機を使用して、５秒間亜鉛溶射を行
い亜鉛を使用した可とう性黒鉛シートを製造した。この
ときの亜鉛層の膜厚は５μｍであった。Example 2 (1) Method for producing flexible graphite sheet using zinc Example 1 except that no zinc wire chop was used.
A flexible graphite sheet was obtained in the same manner as in (1). Using a zinc spraying machine, the obtained sheet was sprayed with zinc for 5 seconds to produce a flexible graphite sheet using zinc. At this time, the thickness of the zinc layer was 5 μm.
【００２０】比較例１ （１）可とう性酸化黒鉛シートの製造方法 亜鉛線チョップを使用しなかった以外は、実施例１
（１）と同じ方法で可とう性黒鉛シートを製造した。 （２）貼り付き性及びシール性試験 実施例１（２）及び（３）と同様の方法で行った。Comparative Example 1 (1) Method for producing flexible graphite oxide sheet Example 1 except that no zinc wire chop was used.
A flexible graphite sheet was manufactured in the same manner as in (1). (2) Sticking property and sealing property test A test was performed in the same manner as in Examples 1 (2) and (3).
【００２１】表１に上記で行った貼り付き性の試験結果
を示す。Table 1 shows the results of the sticking test performed above.
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】請求項１、２及び３記載の可とう性黒鉛
シートは、優れたシール性と耐熱性を有したバランスの
良いシール材であって、相手材（金属）との貼り付き発
生の殆どない。また請求項４記載のシート状複合材料
は、優れたシール性と耐熱性を有したバランスの良いシ
ール材であって、相手材（金属）との貼り付き発生が殆
どない。The flexible graphite sheet according to the first, second and third aspects is a well-balanced sealing material having excellent sealing properties and heat resistance, and is capable of causing sticking to a mating material (metal). Almost no. The sheet-like composite material according to the fourth aspect is a well-balanced sealing material having excellent sealing properties and heat resistance, and hardly causes sticking to a mating material (metal).
Claims (4)
黒鉛と亜鉛を含んでなる可とう性黒鉛シート。1. A flexible graphite sheet comprising expanded graphite and zinc obtained by treating graphite with an acidic substance.
求項１記載の可とう性黒鉛シート。2. The flexible graphite sheet according to claim 1, wherein zinc is dispersed in the expanded graphite.
てなる請求項１記載の可とう性黒鉛シート。3. The flexible graphite sheet according to claim 1, wherein zinc is sprayed on the sheet of expanded graphite.
された請求項１、２又は３記載の可とう性黒鉛シートか
らなるシール材層とを有してなるシート状複合材料。4. A sheet-like composite material comprising a core material layer and a sealing material layer made of the flexible graphite sheet according to claim 1, bonded to one or both surfaces thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10080060A JPH11278821A (en) | 1998-03-27 | 1998-03-27 | Flexible graphite sheet and sheet-like composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10080060A JPH11278821A (en) | 1998-03-27 | 1998-03-27 | Flexible graphite sheet and sheet-like composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11278821A true JPH11278821A (en) | 1999-10-12 |
Family
ID=13707702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10080060A Pending JPH11278821A (en) | 1998-03-27 | 1998-03-27 | Flexible graphite sheet and sheet-like composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11278821A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100642923B1 (en) * | 2002-06-18 | 2006-11-03 | 도요탄소 가부시키가이샤 | High pure expanded graphite sheet having flexible bending ability and its manufacturing method, and the inner layer of crucible using the sheet |
-
1998
- 1998-03-27 JP JP10080060A patent/JPH11278821A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100642923B1 (en) * | 2002-06-18 | 2006-11-03 | 도요탄소 가부시키가이샤 | High pure expanded graphite sheet having flexible bending ability and its manufacturing method, and the inner layer of crucible using the sheet |
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