JPH06117614A - Burning method of carbon fibers and burning method of carbon fiber reinforced resin mixture - Google Patents

Burning method of carbon fibers and burning method of carbon fiber reinforced resin mixture

Info

Publication number
JPH06117614A
JPH06117614A JP26362192A JP26362192A JPH06117614A JP H06117614 A JPH06117614 A JP H06117614A JP 26362192 A JP26362192 A JP 26362192A JP 26362192 A JP26362192 A JP 26362192A JP H06117614 A JPH06117614 A JP H06117614A
Authority
JP
Japan
Prior art keywords
metal
carbon fibers
metals
carbon fiber
alkali
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.)
Granted
Application number
JP26362192A
Other languages
Japanese (ja)
Other versions
JP2722965B2 (en
Inventor
Shoji Yamane
祥司 山根
Yoshinobu Kubota
吉伸 窪田
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP26362192A priority Critical patent/JP2722965B2/en
Publication of JPH06117614A publication Critical patent/JPH06117614A/en
Application granted granted Critical
Publication of JP2722965B2 publication Critical patent/JP2722965B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To effectually and economically burn carbon fibers, mixtures of carbon fibers and matrix resin, and cured products of the mixtures by adding a compound containing one kind or more of metals selected from a group containing alkali metals, alkali rare earth metals, and transition metals by a specific amount to carbon fibers. CONSTITUTION:A compound containing one kind or more of metals selected from a group comprising alkali metals, alkali earth metals, and transition metals is added to carbon fibers by 100ppm or more calculated in terms of the metal element. For adding metal or a metal compound to an article to be burned, a compound of the metal with a hydroxyl group and various metal salts such as acetic acid salts is sprayed as an aqueous solution or in the state of a water dispersion. In order to minimize any danger of a burning furnace, a weak alkali metal compound is preferably used thereamong. Hereby, carbon fibers or a carbon fiber reinforced resin mixture are economically and effectually burned in a short time.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、炭素繊維の焼却方法お
よび炭素繊維強化樹脂混合物の焼却方法に関するもので
ある。さらに詳細には、炭素繊維および炭素繊維強化樹
脂混合物を効率よく焼却処理する方法に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for incinerating carbon fibers and a method for incinerating a carbon fiber reinforced resin mixture. More specifically, the present invention relates to a method for efficiently incinerating a carbon fiber and a carbon fiber reinforced resin mixture.

【0002】[0002]

【従来の技術】従来、炭素繊維は樹脂や金属などのいわ
ゆるマトリックス材料と複合体(コンポジット)を形成
することにより、構造材料として広く用いられている。
また、用いるマトリックス材料としては、成形が容易な
ことから、熱硬化性樹脂や熱可塑性樹脂がもっとも頻繁
に使用されている。構造材料としての炭素繊維は、高度
な機械的特性、耐熱性、電気的性質、耐微生物特性など
を有しているので、飛行機やロケットなどの航空宇宙構
造部材、自動車部品、コンクリート補強などの産業用
途、ゴルフクラブ、テニスラケット、つりざお、自転車
などのスポーツ用品の複合材料の補強繊維として広く使
用されている。これらの炭素繊維をマトリックス樹脂中
に埋め込んだ炭素繊維強化樹脂成形体は、高度な機械的
特性、安定性が災いして、製品としての使用後の処理に
ついて適切な方法が見いだされておらず、一次利用が終
った後では、ほとんどが細断され、産業廃棄物または一
般廃棄物として埋め立てまたは焼却されていた。また、
製造工程で発生する繊維屑、繊維と未硬化樹脂との混合
物、成形体の破片などについても同様で、未だ確立され
た方法はなかった。
2. Description of the Related Art Conventionally, carbon fibers have been widely used as structural materials by forming a composite with a so-called matrix material such as resin or metal.
Further, as the matrix material to be used, thermosetting resins and thermoplastic resins are most frequently used because they are easily molded. Carbon fiber as a structural material has high mechanical properties, heat resistance, electrical properties, microbial resistance, etc., so it is used in aerospace structural members such as airplanes and rockets, automobile parts, and concrete reinforcement industries. Widely used as a reinforcing fiber in composite materials for applications, sports equipment such as golf clubs, tennis rackets, fishing rods, bicycles, etc. The carbon fiber-reinforced resin molded product in which these carbon fibers are embedded in a matrix resin suffers from high mechanical properties and stability, and an appropriate method for treatment after use as a product has not been found, After the end of primary use, most were shredded and landfilled or incinerated as industrial or municipal waste. Also,
The same applies to fiber waste generated in the manufacturing process, a mixture of fibers and uncured resin, and fragments of a molded body, and there has not been an established method.

【0003】これらの廃棄またはリサイクルに関し、焼
却または埋没処理して廃棄する方法、炭素繊維単独の場
合には短繊維に切断または磨砕化して再度充填材や補強
用繊維として使用する方法、特開昭63-39648号公報にみ
られるようにガラス繊維強化プラスチックスの場合は粉
砕により微粉化して他のマトリックスへの強化充填材ま
たは増量材として使用する方法などが試みられている。
とくに、強化繊維が炭素繊維の場合、ガラス繊維と異な
り、アルカリに対する安定性が高いこともあって、セメ
ント、コンクリートなどのいわゆる強アルカリ性マトリ
ックスへの充填材として好適に用いられると考えられ
る。しかしながら、粉砕や埋没に適さない形状、物性の
ものなどでは、焼却処理を行う必要がある。
Regarding the disposal or recycling of these materials, a method of incineration or burial treatment for disposal, a method of cutting or grinding into short fibers in the case of carbon fiber alone, and using again as a filler or reinforcing fiber, As disclosed in Japanese Patent Laid-Open No. 63-39648, a method of pulverizing glass fiber reinforced plastics and using it as a reinforcing filler or a filler for other matrix has been attempted.
In particular, when the reinforcing fiber is carbon fiber, unlike glass fiber, since it has high stability to alkali, it is considered to be preferably used as a filler for so-called strongly alkaline matrix such as cement and concrete. However, if the shape or physical properties are not suitable for crushing or burial, it is necessary to incinerate.

【0004】炭素繊維は、その構造が基本的には黒鉛構
造の炭素からなっており、酸化可能な物質ではあるが、
製造工程で高温での延伸処理を受けているため、一般的
には熱安定性が高く、焼却には比較的長時間を要するた
め、処理の経済性に難点があった。
Carbon fiber, whose structure is basically composed of carbon having a graphite structure, is an oxidizable substance,
Since it is stretched at a high temperature in the manufacturing process, it is generally high in thermal stability, and incineration requires a relatively long time, so that there is a difficulty in processing economy.

【0005】このため、例えば、炭素繊維の耐酸化性を
低下させる目的で、炭素繊維またはマトリックス樹脂中
に予めアルカリ金属などを含有させておくことにより、
焼却による廃棄処理を容易にするという提案がみられる
(特開昭57−117535号公報)。これは、燃焼性
が高く、燃焼後の炭素繊維の電気抵抗を高くすることが
できるため、万一、炭素繊維が浮遊しても電気障害など
が生じにくい炭素繊維強化プラスチックス(以下、CF
RP)を提供できるというものである。これによれば、
CFRPの熱安定性は確かに低下し処理が容易になる
が、通常の使用時において製品としての熱安定性も低下
することを免れ得ず、また、金属がコンポジット全体に
分布しているため、加える金属の量に対して熱安定性の
低下効果が小さいという問題点があった。
Therefore, for example, for the purpose of lowering the oxidation resistance of the carbon fiber, by previously containing an alkali metal or the like in the carbon fiber or the matrix resin,
There is a proposal to facilitate disposal by incineration (Japanese Patent Laid-Open No. 57-117535). This is because carbon fiber reinforced plastics (hereinafter referred to as CF) has high combustibility and can increase the electric resistance of the carbon fiber after combustion, so that even if the carbon fiber floats, electrical failure is unlikely to occur.
RP) can be provided. According to this
Although the thermal stability of CFRP certainly decreases and the treatment becomes easy, the thermal stability of the product as a product cannot be avoided during normal use, and since the metal is distributed throughout the composite, There is a problem that the effect of lowering the thermal stability is small with respect to the amount of added metal.

【0006】なお、例えば、大谷杉郎ら著「炭素繊維」
近代編集社発行(昭和47年)第324頁には、CFRP
の繊維含有率を燃焼または薬液の処理によって測定する
方法が記載されている。
[0006] For example, "Carbon Fiber" by Shiro Otani et al.
CFRP on page 324, published by Kyodo Shosha (Showa 47)
It describes a method for measuring the fiber content of the above by burning or treating with a chemical solution.

【0007】[0007]

【発明が解決しようとする課題】一般的に、炭素繊維は
90%以上が炭素元素からなり、その燃焼熱は石炭など
と殆ど同程度の値を示すにもかかわらず、非常に熱安定
性が高いため、燃焼に多大の時間を要するため、廃棄物
処理の観点からは、不燃物として位置づけられてきた。
したがって、本発明の課題は、このような炭素繊維、炭
素繊維とマトリックス樹脂との混合体およびその硬化物
などを効率よく経済的に焼却処理する技術を提供するこ
とにある。
Generally, 90% or more of carbon fiber is composed of carbon element, and although its combustion heat shows almost the same value as that of coal, it has very high thermal stability. Since it is expensive, it takes a lot of time to burn, so it has been regarded as an incombustible material from the viewpoint of waste treatment.
Therefore, an object of the present invention is to provide a technique for efficiently and economically incinerating such carbon fibers, a mixture of carbon fibers and a matrix resin, and a cured product thereof.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するため
本発明の炭素繊維の焼却方法は、次の構成を有する。す
なわち、炭素繊維を焼却処理するに際し、アルカリ金
属、アルカリ土類金属、遷移金属よりなる群から選ばれ
た1種以上の金属を含む化合物を、炭素繊維に対し金属
元素に換算して100ppm以上添加することを特徴と
する炭素繊維の焼却方法である。
In order to solve the above problems, the carbon fiber incineration method of the present invention has the following constitution. That is, when incinerating carbon fibers, a compound containing at least one metal selected from the group consisting of alkali metals, alkaline earth metals and transition metals is added to carbon fibers in an amount of 100 ppm or more in terms of metal elements. It is a method of incinerating carbon fibers characterized by:

【0009】また、本発明の炭素繊維強化樹脂混合物の
焼却方法は、次の構成を有する。すなわち、炭素繊維強
化樹脂混合物を焼却処理するに際し、アルカリ金属、ア
ルカリ土類金属、遷移金属よりなる群から選ばれた1種
以上の金属を含む化合物を、炭素繊維に対し金属元素に
換算して100ppm以上添加することを特徴とする炭
素繊維強化樹脂混合物の焼却方法である。
The carbon fiber reinforced resin mixture incineration method of the present invention has the following constitution. That is, when incinerating a carbon fiber reinforced resin mixture, a compound containing at least one metal selected from the group consisting of alkali metals, alkaline earth metals and transition metals is converted to carbon fibers as a metal element. It is a method for incinerating a carbon fiber reinforced resin mixture characterized by adding 100 ppm or more.

【0010】なお、本発明において、炭素繊維強化樹脂
混合物とは、プリプレグのようにマトリックス樹脂が未
硬化状態の混合体とマトリックス樹脂を硬化させた後の
成形体の双方を包含するものである。
In the present invention, the carbon fiber reinforced resin mixture includes both a mixture in which the matrix resin is in an uncured state such as a prepreg and a molded body obtained by curing the matrix resin.

【0011】以下、本発明について詳細に説明する。本
発明は、従来の方法では焼却困難であるとされてきた炭
素繊維、樹脂混合物またはその硬化物を、用済み後、金
属化合物を別途添加し、金属元素の触媒効果によって効
率よく焼却するものである。金属元素による促進機構に
ついては、詳細は不明であるが、本発明に用いる金属ま
たは金属化合物の金属元素として効果が認められるもの
は、Na、K、Liなどのアルカリ金属、Mg、Caな
どのアルカリ土類金属、Fe、Co、Ni、Al、Z
n、V、Zr、Mn、Cr、Cuなどの遷移金属よりな
る群から選ばれた1種以上の金属である。これら金属ま
たはその金属化合物を焼却すべき対象物に付与するに
は、一般的には、金属の水酸基との化合物や酢酸塩など
各種の金属塩化合物を、水溶液または水分散液の状態で
噴霧付与するのが好ましい。
The present invention will be described in detail below. The present invention is a carbon fiber, which has been said to be difficult to incinerate by the conventional method, a resin mixture or a cured product thereof, after the end of use, a metal compound is added separately, and is efficiently incinerated by the catalytic effect of the metal element. is there. Although the details of the promotion mechanism by the metal element are not clear, the metal or metal compound used in the present invention is effective for the metal element such as alkali metals such as Na, K and Li, alkali metals such as Mg and Ca. Earth metal, Fe, Co, Ni, Al, Z
It is at least one metal selected from the group consisting of transition metals such as n, V, Zr, Mn, Cr and Cu. In order to apply these metals or their metal compounds to an object to be incinerated, generally, various metal salt compounds such as compounds with a metal hydroxyl group and acetate are sprayed and applied in the state of an aqueous solution or an aqueous dispersion. Preferably.

【0012】これらのうち、焼却の促進効果を高いもの
とし、焼却炉に対する損傷を極小化するなどの観点か
ら、比較的アルカリ性の弱い金属化合物を用いるのが好
ましく、具体的には、水酸化鉄、塩化鉄、硫酸鉄、酢酸
鉄、硫酸カルシウム、酢酸マグネシウム、酢酸銅が特に
好ましい。
Of these, it is preferable to use a metal compound having relatively weak alkalinity from the viewpoints of enhancing the incineration promoting effect and minimizing damage to the incinerator. Specifically, iron hydroxide is used. , Iron chloride, iron sulfate, iron acetate, calcium sulfate, magnesium acetate, and copper acetate are particularly preferable.

【0013】加える金属または金属化合物の量として
は、金属元素換算で焼却対象物に対し100ppm以
上、好ましくは500ppm以上とするものである。1
00ppm未満では燃焼促進効果に乏しい。一方、燃焼
促進効果は金属量の増加にともなって飽和するし、あま
り大量に加えてもかえってその後処理が問題になること
もあり、また、経済的観点からも、その上限は1000
0ppm以下とすることが好ましい。
The amount of the added metal or metal compound is 100 ppm or more, preferably 500 ppm or more based on the incineration object in terms of metal element. 1
If it is less than 00 ppm, the effect of promoting combustion is poor. On the other hand, the combustion promoting effect saturates with an increase in the amount of metal, and even if added in a too large amount, the subsequent treatment may be a problem, and the upper limit is 1000 from the economical point of view.
It is preferably 0 ppm or less.

【0014】本発明に用いる炭素繊維は、いわゆる補強
用に用いる長繊維、短繊維からなるもの、活性炭素繊維
など特に制限はなく、その前駆体(プリカーサ)の種類
もポリアクリロニトリル系、ピッチ系、セルロース系そ
の他のものが用いられる。
The carbon fiber used in the present invention is not particularly limited, such as long fibers or short fibers used for so-called reinforcement, activated carbon fiber, and the type of its precursor (precursor) is polyacrylonitrile type, pitch type, Cellulosics and others are used.

【0015】炭素繊維は、そのプリカーサ繊維を紡糸す
ることにより得て、必要に応じて200〜400℃の空
気や酸化窒素などの酸化性雰囲気中で加熱焼成して、酸
化繊維に転換する耐炎化工程または不融化工程を通過し
た後、窒素、アルゴン、ヘリウム等の不活性雰囲気また
は真空中でさらに300〜2500℃に加熱して炭化お
よび/または黒鉛化する炭化、黒鉛化工程を経ることに
よって製造される。
The carbon fiber is obtained by spinning the precursor fiber, and if necessary, heated and fired in an oxidizing atmosphere such as air or nitric oxide at 200 to 400 ° C. to convert it to an oxidized fiber. Manufactured by undergoing a carbonization and / or graphitization step of carbonizing and / or graphitizing by further heating to 300 to 2500 ° C. in an inert atmosphere such as nitrogen, argon, helium or vacuum after passing through the step or the infusibilizing step To be done.

【0016】また、水蒸気などの半活性雰囲気で賦活化
した活性炭素繊維などにも本発明を適用することが可能
である。特に、アクリル系繊維やピッチ系繊維から得ら
れる炭素繊維で強度が2GPa以上のものは、熱安定性が高
く、焼却処理も困難であるので、これらに対して本発明
を適用すると著しい効果が発揮される。
The present invention can also be applied to activated carbon fibers activated in a semi-active atmosphere such as steam. In particular, carbon fibers obtained from acrylic fibers or pitch fibers and having a strength of 2 GPa or more have high thermal stability and are difficult to incinerate, so applying the present invention to them exerts a remarkable effect. To be done.

【0017】アクリル系繊維の原料ポリマーの例として
は、適当な共重合モノマーを10%以下含む共重合体
で、乳化、懸濁、塊状、溶液等の一般的な重合方法によ
り得られる、重合度は極限粘度で1.3〜5.0、好ま
しくは1.5〜3.0の範囲のものを挙げることが出来
る。これらの重合体からアクリル系繊維を製造する方法
としては、湿式紡糸法、乾湿式紡糸法、乾式紡糸法によ
ることができる。繊維のフィラメント数は、通常500
〜100000の範囲で選ぶことが出来る。また、単繊
維繊度としては、0.1〜5dの範囲で選ぶことが出来
る。
As an example of the raw material polymer of the acrylic fiber, a copolymer containing 10% or less of a suitable copolymerization monomer, which is obtained by a general polymerization method such as emulsification, suspension, lump, solution, etc. Can have an intrinsic viscosity of 1.3 to 5.0, preferably 1.5 to 3.0. As a method for producing an acrylic fiber from these polymers, a wet spinning method, a dry-wet spinning method, and a dry spinning method can be used. The number of filaments of fiber is usually 500
It can be selected in the range of up to 100,000. The single fiber fineness can be selected in the range of 0.1 to 5d.

【0018】本発明は、焼却対象物として炭素繊維およ
び炭素繊維強化樹脂混合物のいずれにも適用可能であ
る。また、前述のように、炭素繊維強化樹脂混合物と
は、マトリックス樹脂が未硬化状態であるプリプレグお
よびこれを硬化させた後の成形体の双方を包含するもの
である。また、炭素繊維強化樹脂混合物の形状に特に制
限はなく、シート状の中間製品や、実際に使用される成
形品の種々の形状のいずれであってもよい。大型成形品
や複雑な形状の成形品にあっては、予め適当な大きさに
切断または破断しておくことが処理効率を向上させる観
点から好ましい。切断または破断するには、例えば、カ
ッターなどによる切断、プレス機による破断、制御***
など公知の手段を用いることができる。
The present invention can be applied to both carbon fiber and carbon fiber reinforced resin mixture as an object to be incinerated. Further, as described above, the carbon fiber reinforced resin mixture includes both the prepreg in which the matrix resin is in an uncured state and the molded body after curing the prepreg. Further, the shape of the carbon fiber reinforced resin mixture is not particularly limited, and may be any of sheet-shaped intermediate products and various shapes of actually used molded products. In the case of a large-sized molded product or a molded product having a complicated shape, it is preferable to cut or break it into an appropriate size in advance from the viewpoint of improving the processing efficiency. For cutting or breaking, known means such as cutting with a cutter, breaking with a pressing machine, and controlled blasting can be used.

【0019】また、本発明における焼却の対象物が炭素
繊維強化樹脂混合物またはその硬化物(コンポジット)
であるときのマトリックス樹脂については、燃焼可能な
ものである必要があり、エポキシ樹脂、不飽和ポリエス
テル樹脂、ポリイミド樹脂、ビスマレイミド樹脂、フェ
ノール樹脂などの熱硬化性樹脂、ポリプロピレン樹脂、
ナイロン樹脂などの熱可塑性プラスチックスなどがその
例として挙げられる。以下、本発明を実施例によりさら
に具体的、かつ詳細に説明する。
The object of incineration in the present invention is a carbon fiber reinforced resin mixture or a cured product (composite) thereof.
For the matrix resin when it is, it is necessary to be combustible, epoxy resin, unsaturated polyester resin, polyimide resin, bismaleimide resin, thermosetting resin such as phenol resin, polypropylene resin,
Examples thereof include thermoplastics such as nylon resin. Hereinafter, the present invention will be described more specifically and in detail with reference to Examples.

【0020】[0020]

【実施例】【Example】

(実施例1〜3、比較例1〜3)引張弾性率230GP
a、引張強度3.5GPaのポリアクリロニトリル系炭
素繊維を焼却処理するに際して、表1に示す条件を用い
て、通常に焼却処理する温度に比し低い温度である51
0℃で燃焼時間(重量保持率が10%以下になる時間)
を測定した。なお、炭素繊維中にもともと含まれている
金属量は、金属元素換算で43ppmであった。表1の
結果から、硫酸第一鉄を鉄元素相当で100ppm以上
添加した系(実施例1〜3および7,表1中のNo.3〜5
および7 )では、鉄元素相当で100ppm未満添加し
た系(比較例1〜2,表1中のNo.1〜2 )に比べ、燃焼
時間の短縮化が達成されることが分かる。
(Examples 1 to 3, Comparative Examples 1 to 3) Tensile elastic modulus 230GP
a, when incinerating the polyacrylonitrile-based carbon fiber having a tensile strength of 3.5 GPa, using the conditions shown in Table 1, the temperature is lower than the temperature for normal incineration.
Burning time at 0 ° C (time when the weight retention rate becomes 10% or less)
Was measured. The amount of metal originally contained in the carbon fiber was 43 ppm in terms of metal element. From the results in Table 1, ferrous sulfate-equivalent iron elements were added in an amount of 100 ppm or more (Examples 1 to 3 and 7, Nos. 3 to 5 in Table 1).
And 7), it can be seen that the combustion time can be shortened as compared with the system (Comparative Examples 1-2 and No. 1-2 in Table 1) corresponding to the iron element and added in an amount of less than 100 ppm.

【0021】また、引張特性がほぼ同様で、炭素繊維内
部に既に100ppmの金属元素を含んでいる炭素繊維
を用いたところ、金属が43ppm内部に含まれている
炭素繊維(比較例1,表1中のNo.1)よりは燃焼性が高
かったが、上記実施例1に比べると促進効果が低い結果
となった(比較例3,表1中のNo.6)。
Further, when carbon fibers having substantially the same tensile properties and already containing 100 ppm of a metal element inside were used, carbon fibers containing 43 ppm of metal therein (Comparative Example 1, Table 1). Although the flammability was higher than that of No. 1), the promotion effect was lower than that of Example 1 (Comparative Example 3, No. 6 in Table 1).

【0022】[0022]

【表1】 (実施例4)引張弾性率500GPa、引張強度2.5
GPaのピッチ系炭素繊維を強化繊維として用い、ジシ
アンジアミドを主硬化剤として125℃で硬化したエポ
キシ樹脂マトリックス系コンポジットを焼却処理するに
際して、表2に示す条件で燃焼を行った。なお、ここで
用いた炭素繊維はもともと繊維内部に鉄、カルシウム、
ナトリウムなどの金属元素を総計23ppm含んでい
た。コンポジットは約15cm角に裁断し、表2に示す各
種の金属化合物を金属元素換算で1000ppm添加
し、着火材、助燃材としての紙屑および木屑を加え、縦
型の燃焼炉にて燃焼試験を行なった。表2に示すように
本発明に規定する金属化合物を所定量加えた系では燃焼
が完全に起こり、燃焼時間の短縮化が達成されることが
分かる。
[Table 1] (Example 4) Tensile elastic modulus 500 GPa, tensile strength 2.5
When incinerating an epoxy resin matrix composite cured at 125 ° C. using GPa pitch-based carbon fiber as a reinforcing fiber and dicyandiamide as a main curing agent, combustion was performed under the conditions shown in Table 2. The carbon fiber used here was originally iron, calcium,
It contained a total of 23 ppm of metal elements such as sodium. The composite is cut into about 15 cm square, various metal compounds shown in Table 2 are added at 1000 ppm in terms of metal element, ignition material, paper waste and wood waste as an auxiliary material are added, and a combustion test is conducted in a vertical combustion furnace. It was As shown in Table 2, it can be seen that in a system in which a predetermined amount of the metal compound specified in the present invention is added, the combustion completely occurs and the combustion time is shortened.

【0023】[0023]

【表2】 [Table 2]

【0024】[0024]

【発明の効果】本発明の方法によれば、短時間で炭素繊
維または炭素繊維強化樹脂混合体を経済的に効率良く焼
却処理することが可能となる。
According to the method of the present invention, it becomes possible to economically and efficiently incinerate a carbon fiber or a carbon fiber reinforced resin mixture in a short time.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】炭素繊維を焼却処理するに際し、アルカリ
金属、アルカリ土類金属、遷移金属よりなる群から選ば
れた1種以上の金属を含む化合物を、炭素繊維に対し金
属元素に換算して100ppm以上添加することを特徴
とする炭素繊維の焼却方法。
1. When incinerating carbon fibers, a compound containing at least one metal selected from the group consisting of alkali metals, alkaline earth metals, and transition metals is converted into metal elements for carbon fibers. A method for incinerating carbon fiber, which comprises adding 100 ppm or more.
【請求項2】炭素繊維強化樹脂混合物を焼却処理するに
際し、アルカリ金属、アルカリ土類金属、遷移金属より
なる群から選ばれた1種以上の金属を含む化合物を、炭
素繊維に対し金属元素に換算して100ppm以上添加
することを特徴とする炭素繊維強化樹脂混合物の焼却方
法。
2. When incinerating a carbon fiber reinforced resin mixture, a compound containing at least one metal selected from the group consisting of alkali metals, alkaline earth metals and transition metals is used as a metal element for carbon fibers. A method for incinerating a carbon fiber reinforced resin mixture, which comprises adding 100 ppm or more in terms of conversion.
【請求項3】金属からなる化合物が水酸化鉄、塩化鉄、
硫酸鉄、酢酸鉄、硫酸カルシウム、酢酸マグネシウム、
酢酸銅からなる群から選ばれた1種以上であることを特
徴とする請求項1または請求項2記載の焼却方法。
3. A compound comprising a metal is iron hydroxide, iron chloride,
Iron sulfate, iron acetate, calcium sulfate, magnesium acetate,
The incineration method according to claim 1 or 2, which is one or more selected from the group consisting of copper acetate.
JP26362192A 1992-10-01 1992-10-01 Carbon fiber incineration method and carbon fiber reinforced resin mixture incineration method Expired - Fee Related JP2722965B2 (en)

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JP2007162164A (en) * 2005-12-14 2007-06-28 Bussan Nanotech Research Institute Inc Oxidation method for carbon fiber
JP2014194330A (en) * 2013-02-26 2014-10-09 Central Research Institute Of Electric Power Industry Coal combustion device and coal combustion method
JP2014193788A (en) * 2013-03-28 2014-10-09 Taiheiyo Cement Corp Incineration apparatus of waste carbon fiber-reinforced plastic, and incineration method
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Publication number Priority date Publication date Assignee Title
JP2007162164A (en) * 2005-12-14 2007-06-28 Bussan Nanotech Research Institute Inc Oxidation method for carbon fiber
JP2014194330A (en) * 2013-02-26 2014-10-09 Central Research Institute Of Electric Power Industry Coal combustion device and coal combustion method
JP2014193788A (en) * 2013-03-28 2014-10-09 Taiheiyo Cement Corp Incineration apparatus of waste carbon fiber-reinforced plastic, and incineration method
CN104559283A (en) * 2014-12-02 2015-04-29 荣成复合材料有限公司 Manufacturing method of carbon fiber composite material valve
WO2019008685A1 (en) * 2017-07-04 2019-01-10 太平洋セメント株式会社 Method for processing carbon fiber-reinforced plastic

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