JPS61254629A - Collected carbon fiber and short fiber chip formed therefrom - Google Patents
Collected carbon fiber and short fiber chip formed therefromInfo
- Publication number
- JPS61254629A JPS61254629A JP9582385A JP9582385A JPS61254629A JP S61254629 A JPS61254629 A JP S61254629A JP 9582385 A JP9582385 A JP 9582385A JP 9582385 A JP9582385 A JP 9582385A JP S61254629 A JPS61254629 A JP S61254629A
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- Prior art keywords
- fiber
- carbon fiber
- carbon
- short
- chips
- Prior art date
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は集束された炭素繊維及びそれで作った短繊維チ
ップに関するものである。さらに詳しくいえば、本発明
は、繊維強化成形材料の充てん剤として好適な良好な集
束性をもつ、集束炭素繊維及びそれで作った特定の物性
をもつ短繊維チップに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to focused carbon fibers and staple fiber chips made therefrom. More specifically, the present invention relates to focused carbon fibers with good bundling properties suitable as fillers for fiber-reinforced molding materials, and short fiber chips made therefrom that have specific physical properties.
従来の技術
近年、炭素繊維を各稲マトリックス中に混合、分散させ
て成る繊維強化成形材料は、炭素繊維の優れた特性、例
えば高強度、高剛性、低比重、高電気伝導性、低熱膨張
率、高耐摩耗性などを有していることから、幅広す用途
が期待され、工業的に重要な材料として注目されている
。Conventional technology In recent years, fiber-reinforced molding materials made by mixing and dispersing carbon fibers into rice matrices have been developed to utilize the excellent properties of carbon fibers, such as high strength, high stiffness, low specific gravity, high electrical conductivity, and low coefficient of thermal expansion. Because it has high wear resistance, it is expected to have a wide range of uses, and is attracting attention as an industrially important material.
一般に、炭素繊維を各種熱可塑性樹脂に混合、分散させ
て繊維強化成形材料を得るには、数百〜数百万本から成
る炭素繊維束をあらかじめ１〜１０ｎに切断して短繊維
チップとし、これを熱可塑性樹脂のベレット又はパウダ
ーとともに押出機中で溶融混練する方法がとられている
。この際、核短繊維チップの集束性が不十分であると、
熱可塑性樹脂中に均一に分散させることができない上に
、作業性も低下する。Generally, in order to obtain a fiber-reinforced molding material by mixing and dispersing carbon fibers in various thermoplastic resins, carbon fiber bundles consisting of hundreds to millions of fibers are cut in advance into 1 to 10 nm pieces to form short fiber chips. A method is used in which this is melt-kneaded together with thermoplastic resin pellets or powder in an extruder. At this time, if the short nuclear fiber chips have insufficient convergence,
Not only cannot it be uniformly dispersed in the thermoplastic resin, but also the workability is reduced.
したがって、炭素繊維の短繊維チップにおいては、十分
な集束性が要求されるが、集束性を高めるためには通常
、炭素繊維束を集束剤により処理する方法、すなわち集
束剤として通常繊維強化成形材料に用いられるマｔｌツ
クス樹脂と同じ種類の樹脂１例えばポリオレフィン、ポ
リエステル。Therefore, short carbon fiber chips are required to have sufficient bundling properties, but in order to increase the bundling properties, carbon fiber bundles are usually treated with a bundling agent. Resins of the same type as the TTL matrix resins used in 1, such as polyolefins and polyesters.
ポリアミド、アクリル樹脂、エポキシ樹脂、フェノール
樹脂などを用い、これらの樹脂を溶媒に溶解して炭素繊
維束に対し０．１〜ｌＯ重量幅付着させる方法が行われ
ている（特開昭５３−１０６７５２号公報）。A method has been used in which polyamide, acrylic resin, epoxy resin, phenol resin, etc. are used, and these resins are dissolved in a solvent and attached to carbon fiber bundles in a weight range of 0.1 to 1 O (Japanese Unexamined Patent Publication No. 53-106752). Publication No.).
しかしながら、前記方法によっても十分な集束性を備え
た炭素繊維束を得ることができず、炭素繊維強化成形材
料の製造に際して重大な障害となっている。However, even with the above method, it is not possible to obtain carbon fiber bundles with sufficient cohesiveness, which poses a serious obstacle in the production of carbon fiber-reinforced molding materials.
例えば、炭素短繊維チップを、スクリュー・フィーダー
、ホッパー・フィーダー、テーブル・フィーダーなどを
用いて、マトリックス中へ供給する場合、該炭素短繊維
チップが供給工程中に機械的混合やかきまぜ作用を受け
るために、集束性の弱い炭素短繊維チップでは、チップ
が開繊して、炭素繊維のからまった毛玉が生じ、それが
該チップの供給工程で詰りの原因となる。また、炭素短
繊維チップの集束が不完全な場合、当初から毛玉を含ん
でいるために、チップの順調な供給が阻害される。この
ように、従来の集束された炭素短繊維チップにおいては
、炭素繊維強化成形材料中の炭素繊維含有景を均一にコ
ントロールすることができず、また、押出機で連続的に
該炭素短繊維チップとマトリックスとを混練して、スト
ランド状の炭素繊維強化成形材料を連続的に押出そうと
する場合、一定の押出し速度が得られず、ストランド切
れが多発し、生産性が著しく低下するという欠点かある
〇
また、従来の有機溶媒を用いて集束剤を被覆する場合に
は、前記した問題に加えて、作業環境や危険性などの点
から、設備や作業方法に対して細心の注意を払わなけれ
ばならないという問題があるＯ
発明が解決しようとする問題点
本発明の第１の目的は、このような炭素繊維強化成形材
料を製造する際に生じる欠点を克服し。For example, when carbon short fiber chips are fed into a matrix using a screw feeder, hopper feeder, table feeder, etc., the carbon short fiber chips are subjected to mechanical mixing and agitation during the feeding process. In addition, when short carbon fiber chips have weak cohesiveness, the chips are opened and a pill of entangled carbon fibers is generated, which causes clogging in the chip supply process. Furthermore, if the short carbon fiber chips are incompletely bundled, they contain fluff from the beginning, which impedes the smooth supply of the chips. As described above, in the conventional focused carbon short fiber chips, it is not possible to uniformly control the carbon fiber content in the carbon fiber reinforced molding material, and the extruder continuously collects the carbon fiber chips. When trying to continuously extrude a strand-shaped carbon fiber-reinforced molding material by kneading and matrix, a constant extrusion speed cannot be obtained, resulting in frequent strand breakage, which significantly reduces productivity. Yes. Also, when coating a sizing agent with a conventional organic solvent, in addition to the above-mentioned problems, careful attention must be paid to equipment and working methods from the viewpoint of the working environment and danger. Problems to be Solved by the Invention The first object of the invention is to overcome the drawbacks that arise when producing such carbon fiber reinforced molding materials.
有機溶媒を用いずに集束性に優れた炭素繊維束を提供す
ることであシ、本発明の第２の目的は作業性が良好で、
かつマトリックス中での分散性がよく、極めて優れた物
性を有する成形品を与えうる炭素短繊維チップを提供す
ることである。A second object of the present invention is to provide a carbon fiber bundle with excellent cohesiveness without using an organic solvent, and a second object of the present invention is to provide a carbon fiber bundle with good workability.
Another object of the present invention is to provide short carbon fiber chips that have good dispersibility in a matrix and can provide molded articles having extremely excellent physical properties.
問題点を解決するための手段
本発明に従えば、界面活性剤で表面処理されたポリアミ
ド樹脂粒状体を０．１〜１０重量憾の範囲の割合で集束
剤として用いて集束炭素繊維とし、所望に応じこの集束
炭素繊維から、かさ密度３００ｆ／を以上及び安息角５
０°以下を有する炭素短繊維チップを形成させることに
よって、その目的を達成することができる。Means for Solving the Problems According to the present invention, polyamide resin granules surface-treated with a surfactant are used as a sizing agent in a proportion in the range of 0.1 to 10% by weight to form bundled carbon fibers. According to this focused carbon fiber, the bulk density is 300 f/ or more and the angle of repose is 5
This objective can be achieved by forming short carbon fiber chips having an angle of 0° or less.
本発明において用いられるポリアミド樹脂としては、例
えばナイロン６、ナイロン６６、ナイロン６１０＆ナイ
ロン１１．ナイロン１２などのナイロンとして通常用い
られている樹脂、各種変性ナイロン又は前記ナイロンの
二元若しくは三元共重合体などが挙げられるが、これら
の中で特に三元共重合ナイロン樹脂は融点が低くて、エ
マルジョン化しやすいので好適である。Examples of the polyamide resin used in the present invention include nylon 6, nylon 66, nylon 610 & nylon 11. Examples include resins commonly used as nylon such as nylon 12, various modified nylons, and binary or ternary copolymers of the above-mentioned nylons. Among these, ternary copolymer nylon resins have particularly low melting points. , is suitable because it can be easily emulsified.
このようなポリアミド樹脂の表面処理に用いられる界面
活性剤としては、特に制限はないが１例エバボッＺ−ル
、ノニルフェニルエーテル、ホリフエニレンクリコール
、ポリオキシメチレングリコールなどの非イオン性界面
活性剤が好ましい。この界面活性剤によシボリアミド樹
脂粒状体の表面処理を行うに社、例えば、界面活性剤０
．５〜５重量係を含有する水溶液中に、溶融したポリア
ミド樹脂を高速でかきまぜながら滴下し、微粒状に分散
させる。このようにして得られた、界面活性剤で表面処
理したポリアミド樹脂粒状体を含む分散液はそのまま炭
素繊維の処理用として用いることができる。There are no particular restrictions on the surfactants used for surface treatment of polyamide resins, but examples include nonionic surfactants such as EVABOLL, nonylphenyl ether, polyphenylene glycol, and polyoxymethylene glycol. Agents are preferred. For example, surfactant 0
．． The molten polyamide resin is dropped into an aqueous solution containing 5 to 5 weight percent while stirring at high speed, and is dispersed into fine particles. The thus obtained dispersion containing polyamide resin particles surface-treated with a surfactant can be used as it is for treating carbon fibers.
本発明において素材として用いる炭素繊維については、
特に制限はなく、各種の公知の炭素繊維、例えばレーヨ
ン、ポリアクリロニトリル、ピッチ、リグニン、炭化水
素ガスなどを用いて製造された炭素質繊維や黒鉛質繊維
及びこれらに金属をコーティングした金属被覆炭素繊維
などの中から任意に選んで用いることができる。Regarding the carbon fiber used as a material in the present invention,
There are no particular restrictions, and there are various known carbon fibers, such as carbon fibers and graphite fibers manufactured using rayon, polyacrylonitrile, pitch, lignin, hydrocarbon gas, etc., and metal-coated carbon fibers that are coated with metal. You can arbitrarily select and use them.
本発明においては、集束剤として、前記のようにして表
面処理されたポリアミド樹脂微粒子を炭素像維の重量に
基づき０．１〜１０重量係、好ましくは０．５〜６重量
幅の範囲の量で用いる０この量が０．１重量幅未満では
集束性が不十分であるし、また１０重重量幅超えると、
これを用いて得られた成形品の物性が劣化する。In the present invention, polyamide resin fine particles surface-treated as described above are used as a sizing agent in an amount ranging from 0.1 to 10 weight percent, preferably from 0.5 to 6 weight percent, based on the weight of the carbon fiber. If this amount is less than 0.1 weight width, the focusing property will be insufficient, and if it exceeds 10 weight width,
The physical properties of molded products obtained using this deteriorate.
本発明の炭素短繊維チップは、かさ密度が３００ｙ７を
以上、好ましくは３５０ｒ／を以上であシ。The short carbon fiber chips of the present invention have a bulk density of 300y7 or more, preferably 350r/ or more.
また安息角は５０°以下、好ましくは４０’以下である
。かさ密度が３００ ｆ ／ を未満のものでは、完全
に集束されているとはいえず、本発明の目的を十分に発
揮することができない０また安息角が５０゜を超えるも
のでは、押出機の供給ホッパー中における流動性が悪い
ので、押出機スクリューへの供給不良やマトリックス樹
脂への不均一分散などが生じ、連続的な生産が困難にな
る。Further, the angle of repose is 50° or less, preferably 40' or less. If the bulk density is less than 300 f / , it cannot be said to be completely focused and the purpose of the present invention cannot be fully achieved.If the angle of repose exceeds 50°, the extruder Poor fluidity in the supply hopper causes poor supply to the extruder screw and non-uniform dispersion in the matrix resin, making continuous production difficult.
本発明の集束炭素繊維は、例えば適当な本数から成る連
続した炭素繊維束を、前記のようにして界面活性剤によ
る表面処理を行ったポリアミド樹脂粒状体０．５〜２０
重量係重量台水性エマルジョン液中に連続的に浸せきし
たのち、２００℃程度の熱風により乾燥し、かつ炭素繊
維表面に付着したポリアミド樹脂粒状体を溶融して集束
させることによって容易に得ることができる。The bundled carbon fibers of the present invention are, for example, polyamide resin granules obtained by surface-treating a continuous carbon fiber bundle consisting of an appropriate number with a surfactant as described above.
It can be easily obtained by continuously immersing the carbon fiber in an aqueous emulsion liquid, drying it with hot air at about 200°C, and melting and converging the polyamide resin particles attached to the surface of the carbon fiber. .
また、短繊維チップはこのようにして得た集束炭素繊維
を、公知の手段で１〜１０１１の長さに切断することに
よって得られる。Further, short fiber chips can be obtained by cutting the thus obtained focused carbon fibers into lengths of 1 to 1011 by known means.
本発明の目的は、このようにして集束性の良好な集束炭
素繊維及びその短繊維チップを提供することにあるが、
繊維強化成形材料に用いられる他の充てん剤、例えばガ
ラス繊維、アラミド繊維、炭化ケイ素繊維、金属繊維、
ボロン繊維などに対しても本発明を応用できる。The purpose of the present invention is to provide a focused carbon fiber with good bundling properties and short fiber chips thereof.
Other fillers used in fiber-reinforced molding materials, such as glass fibers, aramid fibers, silicon carbide fibers, metal fibers,
The present invention can also be applied to boron fibers and the like.
炭素繊維強化成形材料は、例えば本発明の炭素短繊維チ
ップとマトリックス樹脂とをそれぞれ単独で、あるいは
トライブレンド物の形態で押出機に供給し、溶融混練し
たのち、ストランド状に押出された混練物を水冷して、
２〜８ｎの長さに切断することによって得られる。この
成形材料には。The carbon fiber-reinforced molding material is, for example, a kneaded product in which the short carbon fiber chips and matrix resin of the present invention are supplied to an extruder either alone or in the form of a tri-blend, melted and kneaded, and then extruded into strands. water-cooled,
Obtained by cutting into lengths of 2 to 8 nm. For this molding material.
充てん剤として炭素繊維以外のもの、例えばガラス繊維
やアラミド繊維などの繊維強化材料、あるいはガラス、
炭酸カルシウム、金属酸化物、カーボンブラックなどの
粉末状やフレーク状の添加剤などを、必要に応じ１種以
上併用することができる０
また、前記炭素繊維強化成形材料に用いられるマトリッ
クス樹脂としては、公知の樹脂、例えばポリブチレンテ
レフタレート樹脂やポリエチレンテレフタレート樹脂の
ような熱可塑性飽和ポリエステル樹脂、ポリオレフィン
系樹脂、ポリアミド樹脂、ポリアセタール樹脂、ポリス
ルホン樹脂、スチレン系樹脂、塩化ビニル樹＠などの熱
可塑性樹脂、エポキシ樹脂、アクリル樹脂、フェノール
樹脂、不飽和ポリエステル樹脂などの熱硬化性樹脂が挙
げられるが、これらの中で特にポリアミド樹脂が、成形
品の力学的物性を顕著に向上させるので好適である。Fillers other than carbon fiber, such as fiber-reinforced materials such as glass fiber or aramid fiber, or glass,
One or more types of powder or flake additives such as calcium carbonate, metal oxides, carbon black, etc. may be used in combination as necessary. Furthermore, as the matrix resin used in the carbon fiber reinforced molding material, Known resins, such as thermoplastic saturated polyester resins such as polybutylene terephthalate resin and polyethylene terephthalate resin, polyolefin resins, polyamide resins, polyacetal resins, polysulfone resins, styrene resins, thermoplastic resins such as vinyl chloride resin, epoxy Examples include thermosetting resins such as resins, acrylic resins, phenolic resins, and unsaturated polyester resins. Among these, polyamide resins are particularly preferred because they significantly improve the mechanical properties of the molded article.
発明の効果
本発明の集束炭素繊維は、集束性に極めて優れたもので
あり、またこのものから得られた本発明の短繊維チップ
を用いて繊維強化成形材料を製造する場合、該チップは
押出機ホッパーにおける流動性が良好であって、押出機
スクリューへ安定に供給されるので、繊維強化成形材料
の生産性が大幅に向上する。Effects of the Invention The focused carbon fiber of the present invention has extremely excellent bundling properties, and when producing a fiber-reinforced molding material using the short fiber chips of the present invention obtained from the focused carbon fibers, the chips can be extruded. Since the fluidity in the machine hopper is good and the material is stably supplied to the extruder screw, the productivity of the fiber-reinforced molding material is greatly improved.
また、該炭素繊維チップのマ） ＩＪラックス対する分
散性が優れているので、この成形材料を用いて得られる
成形品の力学的物性は良好な値を示す。Furthermore, since the carbon fiber chips have excellent dispersibility in IJ lux, the mechanical properties of molded products obtained using this molding material exhibit good values.
さらに１本発明の集束炭素繊維は、従来のものと異なり
、有機溶媒を用いずに界面活性剤で表面処理されたポリ
アミド樹脂粒状体によシ集束されているので、その製造
設備や操作の面からも極めて有利である。Furthermore, unlike conventional ones, the focused carbon fibers of the present invention are focused in polyamide resin granules that have been surface-treated with a surfactant without using an organic solvent. It is also extremely advantageous.
実施例 次に実施例により本発明をさらに詳細に説明する。Example Next, the present invention will be explained in more detail with reference to Examples.
なお、各物性は次のようにして測定した。In addition, each physical property was measured as follows.
（１） 炭素短繊維チップのかさ密度５０−メスシリ
ンダーに炭素短繊維チップを入れ・ メスシリンダーを
数回振ったのち、５０−になるまでさらに該短繊維チッ
プを加える。このときの短億維チップの重さを体積で除
して求める。(1) Bulk density of carbon short fiber chips: 50 - Place carbon short fiber chips in a graduated cylinder. Shake the measuring cylinder several times, then add more short fiber chips until the bulk density reaches 50. The weight of the short fiber chip at this time is divided by the volume.
（２）炭素短繊維チップの安息角
炭素短繊維チップ約２ｏｆを１０ｃｒｎの高さから徐々
に落下させ、堆積した山の傾斜角度を求める。(2) Angle of repose of carbon short fiber chips Approximately 2 of carbon short fiber chips are gradually dropped from a height of 10 crn, and the inclination angle of the piled up pile is determined.
（３） 成形品の物性 Ｊ工５Ｋ６８１０に準拠して測定する。(3) Physical properties of molded products Measured in accordance with J Engineering 5K6810.
実施例１
（Ａ） 炭素短繊維チップの製造
ナイロン６が７００重量部ナイロン６６が２００重量部
びナイロン６１０が１０重量部である融点１５５℃の三
元共重合ナイロン１０重量部を溶融し。Example 1 (A) Production of short carbon fiber chips 10 parts by weight of ternary copolymerized nylon having a melting point of 155° C. and containing 700 parts by weight of nylon 6, 200 parts by weight of nylon 66, and 10 parts by weight of nylon 610 were melted.
これを、ポバール、ポリエチレングリコールから成る非
イオン性界面活性剤１重量部を含有した温水中に高速で
かきまぜながら滴下して、エマルジョン液１００重量部
を調製した。This was dropped into hot water containing 1 part by weight of a nonionic surfactant consisting of poval and polyethylene glycol while stirring at high speed to prepare 100 parts by weight of an emulsion liquid.
次に、このエマルジョン液中にポリアクリロニトリルを
原料とする炭素繊維６千本を浸せきして、これに前記三
元共重合ナイロン５．６重量部を付着させたのち、長さ
６ｕに切断して炭素短繊維チップを製造した〇
このもののかさ密度は３９６９／ｌ、安息角は３７°で
あった。Next, 6,000 carbon fibers made from polyacrylonitrile were immersed in this emulsion, and 5.6 parts by weight of the ternary copolymerized nylon was attached thereto, and the carbon fibers were cut into lengths of 6 μm. A short fiber chip was produced. The bulk density of this product was 3969/l and the angle of repose was 37°.
（Ｂ） 炭素繊維強化成形材料の製造前記炭素短繊維
チップ３０重量部とナイロン６６樹脂ペレット７０重量
部とをＶ型ミキサーでトライブレンドした。(B) Production of carbon fiber reinforced molding material 30 parts by weight of the carbon short fiber chips and 70 parts by weight of nylon 66 resin pellets were triblended using a V-type mixer.
この１ライブレンド物をスクリュー・フィーダー付きの
二軸押出機で混練・押出しして得られたストランドをペ
レタイズし、炭素短繊維強化成形材料を製造した。This one-live blend was kneaded and extruded using a twin-screw extruder equipped with a screw feeder, and the resulting strands were pelletized to produce a short carbon fiber reinforced molding material.
本実施例では、二軸押出機を４時間連続して運転したが
、スクリュー・フィーダーでの炭素短繊維の開繊による
供給停止や押出されたストランドの切断などのトラブル
は発生しなかった。In this example, the twin-screw extruder was operated continuously for 4 hours, but no troubles such as supply stoppage due to opening of the short carbon fibers in the screw feeder or breakage of the extruded strands occurred.
このようにして得られた炭素短繊維強化成形材料を射出
成形した試験片の引張強度は３０００に９／ｄ、曲げ強
度は４２００に９／ｃｄ、 工ｚｏｄ衝撃値は９ 、
１ Ｋ９・（７）／儒であった〇比較例１
実施例１において三元共重合ナイロンの代シに分子量約
９００のエポキシ系樹脂を用いる以外は。The test piece obtained by injection molding the short carbon fiber reinforced molding material thus obtained had a tensile strength of 3000 to 9/d, a bending strength of 4200 to 9/cd, and an engineering zod impact value of 9.
1 K9・(7)/Comparative Example 1 Example 1 except that an epoxy resin with a molecular weight of about 900 was used instead of the ternary copolymerized nylon.
実施例１と全く同様にして炭素短繊維チップを製造し、
さらに炭素繊維強化材料を製造した。Producing short carbon fiber chips in exactly the same manner as in Example 1,
Furthermore, carbon fiber reinforced materials were manufactured.
炭素短繊維チップのかさ密度は３６（１／ｌ、安息角は
４５°、エポキシ系樹脂の付着量は５．７重量部であっ
た。The bulk density of the short carbon fiber chips was 36 (1/l), the angle of repose was 45°, and the amount of epoxy resin attached was 5.7 parts by weight.
また、二軸押出機運転時において、スクリュー・フィー
ダーでの炭素短繊維の詰シや押出されたストランドの切
断が多発し、順調な運転ができなかった。Furthermore, when operating the twin-screw extruder, the screw feeder was often clogged with short carbon fibers and the extruded strands were broken, making it difficult to operate smoothly.
得られた成形材料の引張強度は２ 、５００ Ｋ９／
ｄ。The tensile strength of the molding material obtained was 2,500 K9/
d.
曲げ強度は３，６００Ｋｐ／ｉ、 Ｉｚｏｄ衝撃値は
７．２に９・ｃｍｌ備であった。The bending strength was 3,600 Kp/i, and the Izod impact value was 7.2 to 9 cm.
実施例２．３、 比較例２〜４
次表に示した条件で、実施例１と同様にして炭素短繊維
チップを製造し、さらに炭素短繊維強化成形材料を作成
した。各物性及び押出性を該表に示す〇Example 2.3, Comparative Examples 2 to 4 Carbon short fiber chips were produced in the same manner as in Example 1 under the conditions shown in the following table, and a carbon short fiber reinforced molding material was also created. Each physical property and extrudability are shown in the table〇
Claims (1)
繊維であつて、かつその集束剤が界面活性剤で表面処理
されたポリアミド樹脂粒状体であることを特徴とする集
束炭素繊維。 ２ 集束剤０．１〜１０重量％を用いて集束された炭素
繊維であつて、かつその集束剤が界面活性剤で表面処理
されたポリアミド樹脂粒状体である集束炭素繊維から形
成され、かさ密度３００ｇ／ｌ以上、安息角５０°以下
を有することを特徴とする炭素短繊維チップ。[Scope of Claims] 1. Carbon fibers bundled using 0.1 to 10% by weight of a sizing agent, and characterized in that the sizing agent is polyamide resin granules whose surface is treated with a surfactant. and focused carbon fiber. 2 Carbon fibers that have been bundled using 0.1 to 10% by weight of a sizing agent, and the sizing agent is formed from bundled carbon fibers that are polyamide resin granules that have been surface-treated with a surfactant, and have a bulk density of A short carbon fiber chip characterized by having a carbon content of 300 g/l or more and an angle of repose of 50° or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9582385A JPS61254629A (en) | 1985-05-04 | 1985-05-04 | Collected carbon fiber and short fiber chip formed therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9582385A JPS61254629A (en) | 1985-05-04 | 1985-05-04 | Collected carbon fiber and short fiber chip formed therefrom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61254629A true JPS61254629A (en) | 1986-11-12 |
Family
ID=14148127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9582385A Pending JPS61254629A (en) | 1985-05-04 | 1985-05-04 | Collected carbon fiber and short fiber chip formed therefrom |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61254629A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01245027A (en) * | 1987-12-28 | 1989-09-29 | Osaka Gas Co Ltd | Massive carbon fiber containing resin composition and production thereof |
| JPH028225A (en) * | 1987-11-16 | 1990-01-11 | Osaka Gas Co Ltd | Bulky resin composition for production of carbon fiber-reinforced colored resin and production of the same resin composition |
| JPH02125706A (en) * | 1988-11-04 | 1990-05-14 | Toho Rayon Co Ltd | Manufacture of carbon fiber bundle |
| CN108004781A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of carbon fiber polyamide resin aliphatic radical suspension sizing agent and preparation method thereof |
-
1985
- 1985-05-04 JP JP9582385A patent/JPS61254629A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH028225A (en) * | 1987-11-16 | 1990-01-11 | Osaka Gas Co Ltd | Bulky resin composition for production of carbon fiber-reinforced colored resin and production of the same resin composition |
| JPH01245027A (en) * | 1987-12-28 | 1989-09-29 | Osaka Gas Co Ltd | Massive carbon fiber containing resin composition and production thereof |
| JPH02125706A (en) * | 1988-11-04 | 1990-05-14 | Toho Rayon Co Ltd | Manufacture of carbon fiber bundle |
| CN108004781A (en) * | 2016-10-28 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of carbon fiber polyamide resin aliphatic radical suspension sizing agent and preparation method thereof |
| CN108004781B (en) * | 2016-10-28 | 2022-02-25 | 中国石油化工股份有限公司 | Polyamide resin-based suspension sizing agent for carbon fibers and preparation method thereof |
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