JP2570312B2 - Carbon fiber resin molded product - Google Patents
Carbon fiber resin molded productInfo
- Publication number
- JP2570312B2 JP2570312B2 JP62197908A JP19790887A JP2570312B2 JP 2570312 B2 JP2570312 B2 JP 2570312B2 JP 62197908 A JP62197908 A JP 62197908A JP 19790887 A JP19790887 A JP 19790887A JP 2570312 B2 JP2570312 B2 JP 2570312B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- carbon fiber
- molded product
- fiber
- heat insulating
- 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 - Fee Related
Links
Landscapes
- Reinforced Plastic Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、熱硬化性或いは熱可塑性樹脂をマトリック
ス樹脂とし、マット、フエルト、ペーパー等の曲状の炭
素繊維を強化材として用いてなる多孔質かつ軽量の炭素
繊維樹脂成形品に関するもので、断熱材、構造材、摺動
材、導電材等に用いられ得る。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a porous material using a thermosetting or thermoplastic resin as a matrix resin, and a curved carbon fiber such as mat, felt, paper or the like as a reinforcing material. The present invention relates to a high quality and lightweight carbon fiber resin molded product, and can be used as a heat insulating material, a structural material, a sliding material, a conductive material, and the like.
（従来の技術及びその問題点） 近年、航空、宇宙、電気、電子、自動車産業等広範な
産業分野において軽量かつ摺動性、導電性、耐薬品性な
どの特性を有した材料の必要性が増している。このよう
な目的に合う材料として直状の炭素繊維を使用目的、用
途などに応じて織物、ペーパー、フエルト、マット等に
加工し、更に、それらを樹脂などと組み合わせて使用さ
れている。かかる直状の炭素繊維に樹脂を含浸し、加熱
圧縮して多孔質の成形品を得る事は比較的容易である。(Prior art and its problems) In recent years, there is a need for materials that are lightweight and have properties such as slidability, conductivity, and chemical resistance in a wide range of industrial fields such as the aviation, space, electric, electronic, and automotive industries. Is increasing. As a material suitable for such a purpose, straight carbon fiber is processed into a woven fabric, paper, felt, mat, or the like according to the purpose of use, use, and the like, and further, is used in combination with a resin or the like. It is relatively easy to impregnate such a straight carbon fiber with a resin and heat and compress it to obtain a porous molded product.
しかし、直状の炭素繊維からなるマット、フエルト等
を強化材として使用すると、多孔質である部分の占める
割合いが少ない或いはボイドのない成形品に比べてほと
んど重量の変化がない等の問題があった。However, when a mat or felt made of straight carbon fiber is used as a reinforcing material, problems such as a small proportion of the porous portion or little change in weight as compared with a molded product having no void are caused. there were.
（問題を解決する為の手段） 本発明者らはかかる問題を検討した結果、曲状の炭素
繊維を強化材として使用した場合、この繊維が三次元的
に曲状であるが故に多孔質になり易く、かつ軽量である
成形品が得られることを見出し、本発明に至った。(Means for Solving the Problem) As a result of studying such a problem, the present inventors have found that when a curved carbon fiber is used as a reinforcing material, the carbon fiber becomes porous because the fiber is three-dimensionally curved. The present inventors have found that a molded article that is easy to be formed and that is lightweight can be obtained.
本発明で用いられる曲状の炭素繊維とは嵩高い特徴が
あり、通常500mlビーカーにビーカーの容積を満たすよ
うに試料を入れ、10g/cm2の加圧下で測定した時にアス
ペクト比500に於いて比容積が200ml/g以上になる炭素繊
維を言う。かかる繊維はアスペクト比50以上で直状炭素
繊維との比容積の差が顕著となり、通常2.5ml/g以上の
比容積を示す。本炭素繊維の製造方法は上記特徴を有す
るものであればいかなる方法であっても良い。The song-like carbon fiber used in the present invention have bulky characteristics, usually the sample was placed so as to satisfy the beaker volume 500ml beaker, at the aspect ratio 500 when measured under a pressure of 10 g / cm 2 A carbon fiber whose specific volume is 200 ml / g or more. Such fibers have a remarkable difference in specific volume from straight carbon fibers when the aspect ratio is 50 or more, and usually show a specific volume of 2.5 ml / g or more. The method for producing the present carbon fiber may be any method as long as it has the above characteristics.
本発明において使用される曲状炭素繊維は加工して得
られるマット、フエルト、ペーパーなどの嵩高い強化材
として用いることができる。例えば短繊維を堆積して得
られるマットは比容積10〜200ml/g、マットをニードル
パンチして得られるフエルトは比容積６〜10ml/gであ
る。本発明において使用され得る嵩高い強化材は炭素繊
維のみからなる加工品に限定されるものではなく、価格
の低下、物性の向上などを目的として用途に応じて炭素
繊維と、ガラス繊維、アルミナ繊維、炭化硅素繊維、窒
化炭素繊維等の無機繊維、ケブラーに代表されるアラミ
ド繊維、カイトル等の有機繊維との混合加工品あるいは
分散可能な範囲でのグラファイト、カーボンブラック、
二硫化モリブデン、炭化カルシウム、タルク等の無機フ
ィラーを添加した配合加工品も使用可能である。The curved carbon fiber used in the present invention can be used as a bulky reinforcing material such as a mat, a felt, and a paper obtained by processing. For example, a mat obtained by depositing short fibers has a specific volume of 10 to 200 ml / g, and a felt obtained by needle-punching the mat has a specific volume of 6 to 10 ml / g. The bulky reinforcing material that can be used in the present invention is not limited to a processed product composed of only carbon fiber, but includes carbon fiber, glass fiber, and alumina fiber depending on the application for the purpose of lowering the price, improving physical properties, and the like. , Silicon carbide fiber, inorganic fiber such as carbon nitride fiber, aramid fiber typified by Kevlar, mixed product with organic fiber such as kettle, or graphite or carbon black within the dispersible range.
Compounded processed products to which inorganic fillers such as molybdenum disulfide, calcium carbide, and talc are added can also be used.
一方、本発明において使用される樹脂は熱硬化性樹
脂、熱可塑性樹脂いずれにも限定するものではなく、例
えばエポキシ樹脂、フェノール樹脂、飽和及び不飽和ポ
リエステル樹脂、ビニルエステル樹脂、ポリウレタン、
ポリ塩化ビニル、可溶性ナイロン、ポリエチレン、ポリ
プロピレン等を挙げることができる。熱硬化性樹脂を使
用する場合、上記の曲状炭素繊維の嵩高い強化材に含浸
させる方法としては溶剤法、無溶剤法等の巾広い含浸シ
ステムを用いることができるが、含浸の容易さという点
から常温で粘度の低い（例えば１ポイズ以下）ものを用
いることが好ましく、また溶剤法で行なう場合は含浸後
の乾燥工程（Ｂ−ステージ化）を考慮するとアセトン、
MEK、塩化メチレン等の低沸点溶剤に溶ける樹脂を用い
ることが好ましい。On the other hand, the resin used in the present invention is not limited to any of thermosetting resin and thermoplastic resin, for example, epoxy resin, phenol resin, saturated and unsaturated polyester resin, vinyl ester resin, polyurethane,
Examples thereof include polyvinyl chloride, soluble nylon, polyethylene, and polypropylene. When using a thermosetting resin, as a method of impregnating the bulky reinforcing material of the above-mentioned curved carbon fiber, a wide range of impregnation system such as a solvent method and a solventless method can be used, but the ease of impregnation is referred to. From the point of view, it is preferable to use a material having a low viscosity at room temperature (for example, 1 poise or less). When the solvent method is used, acetone,
It is preferable to use a resin soluble in a low boiling point solvent such as MEK and methylene chloride.
なお、樹脂の種類は用途により耐熱性、摺動性、強度
等の要求される物性を持つ樹脂を選択することが望まし
く、成形条件等の簡便さを目的としてそれらの樹脂を適
宜配合することも勿論何らさしつかえない。In addition, it is desirable to select a resin having required physical properties such as heat resistance, slidability, and strength depending on the application, and it is also possible to appropriately mix these resins for the purpose of simplifying molding conditions and the like. Of course I can't do anything.
本発明に於ける曲状炭素繊維に含浸させる樹脂の含有
率は成形加工した際内部に孔を多く含ませ、軽量化を図
る等の目的から20〜50重量％が好ましい。In the present invention, the content of the resin to be impregnated into the curved carbon fibers is preferably 20 to 50% by weight for the purpose of increasing the number of pores inside the molded carbon fiber and reducing the weight.
得られたプリプレグを用いて成形する為の成形装置は
使用している樹脂の種類により種々選択することができ
るが、例えばプレス、オートクレーブや平板金属等で挾
んだ上でオーブン中で加熱硬化することも可能である。
又、成形条件については温度は使用した樹脂に合った温
度を選択することができる。しかし、熱硬化樹脂を使用
する場合、樹脂のみがフローしてしまうことを避けるた
めに硬化を早くすることを目的として通常の成形温度よ
り10℃〜50℃高くすることが好ましい。圧力について
は、成形板の内部に多くの空気孔を含有させ、かつ軽量
化を計ることを目的とする為熱硬化性樹脂を使用する場
合0.1〜5kg/cm2で成形することが好ましい。A molding apparatus for molding using the obtained prepreg can be variously selected depending on the type of resin used. For example, after being sandwiched by a press, an autoclave, a flat metal, etc., it is heated and cured in an oven. It is also possible.
As for the molding conditions, a temperature suitable for the used resin can be selected. However, when a thermosetting resin is used, it is preferable to raise the temperature by 10 ° C. to 50 ° C. higher than a normal molding temperature for the purpose of speeding up the curing in order to prevent only the resin from flowing. The pressure is preferably 0.1 to 5 kg / cm 2 when a thermosetting resin is used in order to make the molded plate contain many air holes and to reduce the weight.
又、熱可塑性樹脂を使用する場合も同様の理由により
成形機の種類、成形物の形状等を考慮して適宜選べば良
い。成形時間についても、使用した樹脂の種類により充
分硬化させることが望ましいが、作業性等の理由によ
り、充分硬化していない状態で成形機から取り出し、そ
の後加熱装置等で加熱後、冷却して硬化させることも何
らさしつかえない。When a thermoplastic resin is used, it may be appropriately selected in consideration of the type of a molding machine, the shape of a molded product, and the like for the same reason. As for the molding time, it is desirable to cure sufficiently according to the type of resin used. Nothing can be done.
本発明の成形品は、断熱材として使用する場合には充
分な断熱効果を生み出す必要から内部に多くの空気孔を
含むことが望ましく、かかる空気孔の占める割合いが密
度で判断される。勿論、使用する樹脂、強化材の種類に
より異なるが、ここでは樹脂の密度は1.1g/cm3、炭素繊
維の密度は1.8g/cm3を基準とする。このような材料を用
いて成形した断熱材は用途により樹脂含有率、成形温
度、圧力等の条件を変えることで密度を自由に選択する
ことができる。尚、直状の炭素繊維を用いて断熱材を作
成した場合、その密度が0.12g/cm3以下のものを成形す
るのはほとんど難しいが、曲状の炭素繊維を使用した場
合は密度が0.06g/cm3程度の低いものも成形可能であ
る。つまり曲状の炭素繊維を用いた法が孔を多く含む為
断熱効果が高く、かつ軽量である。When used as a heat insulating material, the molded article of the present invention desirably contains a large number of air holes in order to produce a sufficient heat insulating effect, and the proportion of such air holes is determined by the density. Of course, the resin used may vary depending on the type of reinforcement, wherein the density of the resin is 1.1 g / cm 3, the density of the carbon fibers is based on the 1.8 g / cm 3. The density of the heat insulating material molded using such a material can be freely selected by changing conditions such as resin content, molding temperature, pressure and the like according to the application. In addition, when a heat insulating material is made using straight carbon fibers, it is almost difficult to mold a heat insulating material having a density of 0.12 g / cm 3 or less, but when using a curved carbon fiber, the density becomes 0.06 g / cm 3. Moldings as low as g / cm 3 are also possible. That is, since the method using the curved carbon fiber includes many holes, the heat insulating effect is high and the weight is light.
（発明の効果） 本発明は、曲状の炭素繊維を用いることにより、密度
の低い、即ちより多孔質であるため断熱性が高く、且つ
軽量である成形品をもたらすことができる。(Effect of the Invention) By using a curved carbon fiber, the present invention can provide a molded article having a low density, that is, a porous body, having high heat insulating properties, and being lightweight.
（実施例） 以下に、実施例等により本発明を更に説明する。尚、
例中の部は重量基準である。(Examples) Hereinafter, the present invention will be further described with reference to examples and the like. still,
Parts in the examples are on a weight basis.
＜比較例１＞ ディックライトUE−5210（大日本インキ化学社製） 100部 ラジカル開始剤 1.3部 増粘剤（MDI） 9.0部 からなるビニルエステル樹脂を配合し、アセトンを用い
て希釈撹拌しN.V20重量％の含浸用マトリックス樹脂と
した。このマトリックス樹脂を直状の炭素短繊維マット
クレカフェルトＦ−110（呉羽化学社製比容積10ml/g）
に含浸し、80℃、２時間の条件でＢ−ステージ化を行い
樹脂含有率22重量％のマット状プリプレグを得た。この
プリプレグを150℃、１時間の条件で加熱硬化を行い、
厚さ1.0cmの断熱材を得た。この断熱材の密度は0.13g/c
m3であり、23℃〜100℃の範囲における熱伝導係数（AST
MC−177にて測定。以下同じ。）は0.0115kcal/m・hr・
℃であった。<Comparative Example 1> Dicklight UE-5210 (manufactured by Dainippon Ink and Chemicals, Inc.) 100 parts Radical initiator 1.3 parts Thickener (MDI) 9.0 parts A vinyl ester resin was blended, diluted with acetone and stirred with N. A matrix resin for impregnation of 20% by weight was used. This matrix resin is used as a straight carbon short fiber matt Crecafe F-110 (specific volume 10 ml / g, manufactured by Kureha Chemical Co., Ltd.).
And a B-stage was formed at 80 ° C. for 2 hours to obtain a mat-like prepreg having a resin content of 22% by weight. This prepreg is cured by heating at 150 ° C for 1 hour.
A heat insulating material having a thickness of 1.0 cm was obtained. The density of this insulation is 0.13g / c
m 3, the thermal conductivity coefficient in the range of 23 ° C. to 100 ° C. (AST
Measured with MC-177. same as below. ) Is 0.0115kcal / m ・ hr ・
° C.
＜比較例２＞ 比較例１のプリプレグを３枚用いて同条件にて厚さ1.
0cmの断熱材を得た。この断熱材の密度は0.38g/cm3であ
り、23℃〜100℃の温度範囲における熱伝導係数は0.058
1kcal/m・hr・℃であった。<Comparative Example 2> Using the three prepregs of Comparative Example 1 under the same conditions and a thickness of 1.
A 0 cm insulation was obtained. The density of the insulation material is 0.38 g / cm 3, the thermal conductivity coefficient in a temperature range of 23 ° C. to 100 ° C. 0.058
It was 1 kcal / m · hr · ° C.
＜参考例＞ 密度0.38g/cm3の発泡コンクリートの同温度範囲にお
ける熱伝導係数は0.103kcal/m・hr・℃である。<Reference Example> The thermal conductivity coefficient of foamed concrete having a density of 0.38 g / cm 3 in the same temperature range is 0.103 kcal / m · hr · ° C.
＜実施例１＞ 比較例１と同じマトリックス樹脂を本発明で規定した
様な曲状の炭素短繊維マットDONA CARBO Ｓ−222（ド
ナック社製、比容積20ml/g）に含浸し、比較例１と同じ
条件でＢ−ステージ化を行い樹脂含有率21重量％のマッ
ト状プリプレグを得た。このプリプレグを比較例１と同
じ条件で加熱硬化させ、厚さ1.0cmの断熱材を得た。こ
の断熱材の密度は0.06g/cm3であり、23〜100℃の温度範
囲の熱伝導係数は0.0054kcal/m・hr・℃であった。直状
の炭素繊維を使用した場合（比較例１）に比べて断熱効
果が高いことが判る。<Example 1> The same matrix resin as in Comparative Example 1 was impregnated into a curved carbon short fiber mat DONA CARBO S-222 (manufactured by Donac, specific volume 20 ml / g) as defined in the present invention. Under the same conditions as described above, B-stage was formed to obtain a mat-like prepreg having a resin content of 21% by weight. The prepreg was cured by heating under the same conditions as in Comparative Example 1 to obtain a heat insulating material having a thickness of 1.0 cm. The density of the heat insulating material was 0.06 g / cm 3 , and the heat conductivity coefficient in the temperature range of 23 to 100 ° C. was 0.0054 kcal / m · hr · ° C. It can be seen that the heat insulating effect is higher than when using straight carbon fibers (Comparative Example 1).
＜実施例２＞ 実施例１のプリプレグ３枚を用いて、実施例１と同条
件にて厚さ1.0cmの断熱材を得た。この断熱材の密度は
0.36g/cm3であり、23〜100℃の温度範囲における熱伝導
率は0.0408kcal/m・hr・℃であった。直状の炭素繊維を
使用した場合（比較例２）に比べて断熱効果が高いこと
が判る。<Example 2> A heat insulating material having a thickness of 1.0 cm was obtained using the three prepregs of Example 1 under the same conditions as in Example 1. The density of this insulation is
0.36 g / cm 3 , and the thermal conductivity in the temperature range of 23 to 100 ° C. was 0.0408 kcal / m · hr · ° C. It can be seen that the heat insulating effect is higher than when the straight carbon fibers are used (Comparative Example 2).
Claims (1)
ように試料を入れ、10g/cm2の加圧下で測定した時に、
アスペクト比500に於いて比容積が200ml/g以上となる、
曲状の炭素短繊維に樹脂を含浸してなるプリプレグを成
形して得られる多孔質、かつ軽量である炭素繊維樹脂成
形品。A sample is placed in a 500 ml beaker so as to fill the volume of the beaker, and measured under a pressure of 10 g / cm 2 ,
With a specific volume of 200 ml / g or more at an aspect ratio of 500,
A porous and lightweight carbon fiber resin molded product obtained by molding a prepreg obtained by impregnating a resin into a curved carbon short fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62197908A JP2570312B2 (en) | 1987-08-07 | 1987-08-07 | Carbon fiber resin molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62197908A JP2570312B2 (en) | 1987-08-07 | 1987-08-07 | Carbon fiber resin molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6440532A JPS6440532A (en) | 1989-02-10 |
| JP2570312B2 true JP2570312B2 (en) | 1997-01-08 |
Family
ID=16382276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62197908A Expired - Fee Related JP2570312B2 (en) | 1987-08-07 | 1987-08-07 | Carbon fiber resin molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2570312B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2745944C (en) | 2003-03-26 | 2012-07-31 | Seiko Epson Corporation | Liquid container |
| BR112012031770A8 (en) * | 2010-11-03 | 2018-01-02 | Sgl Carbon Se | REINFORCED NON-WOVEN CLOTH |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6222361Y2 (en) * | 1981-01-29 | 1987-06-06 | ||
| JPS5914926A (en) * | 1982-07-16 | 1984-01-25 | Mitsubishi Rayon Co Ltd | Prepreg with bent section and manufacture thereof |
| JPS59157342A (en) * | 1983-02-28 | 1984-09-06 | 三菱レイヨン株式会社 | Filament processed yarn and composite material |
-
1987
- 1987-08-07 JP JP62197908A patent/JP2570312B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6440532A (en) | 1989-02-10 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |