JPH079444A - Carbon fiber bundle and prepreg - Google Patents
Carbon fiber bundle and prepregInfo
- Publication number
- JPH079444A JPH079444A JP15668793A JP15668793A JPH079444A JP H079444 A JPH079444 A JP H079444A JP 15668793 A JP15668793 A JP 15668793A JP 15668793 A JP15668793 A JP 15668793A JP H079444 A JPH079444 A JP H079444A
- Authority
- JP
- Japan
- Prior art keywords
- carbon fiber
- fiber bundle
- sizing agent
- prepreg
- weight
- 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
Links
Landscapes
- Reinforced Plastic Materials (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高次加工性のすぐれた
炭素繊維束に関する。さらに詳しくは、実質的によりが
なく開繊性にすぐれながら、加工上に必要な収束性を有
する炭素繊維束、およびこの炭素繊維束を用いて製造し
たプリプレグに関する。FIELD OF THE INVENTION The present invention relates to a carbon fiber bundle having high workability. More specifically, the present invention relates to a carbon fiber bundle having substantially the same excellent openability, but having a converging property necessary for processing, and a prepreg produced by using the carbon fiber bundle.
【０００２】[0002]
【従来の技術】炭素繊維は、そのすぐれた特性により、
航空・宇宙産業、工業、スポーツなどの広い分野におい
て、プラスチック補強用に広く用いられている。炭素繊
維をプラスチック補強用に使用するには、通常、炭素繊
維の束にマトリックスを形成するエポキシ樹脂、不飽和
ポリエステル樹脂などの熱硬化性樹脂を含浸した後、成
形加工している。ところで、炭素繊維が、補強されるプ
ラスチックの力学的特性を所望の条件で効率よく向上さ
せるには、プラスチック中で炭素繊維束が均一に開繊さ
れていることが必要である。一方、炭素繊維は収束性に
乏しいので、何らかの処理を施さない限り、その製造工
程や加工工程における作業性が極めて悪く、また、多数
の毛羽が発生して損傷を受けるという問題がある。作業
性を改善するには炭素繊維束によりをかければよい。し
かし、よりは、プラスチック中の炭素繊維の開繊を阻害
し、炭素繊維の補強効果を妨げるので、炭素繊維束は、
実質的に無よりまたはそれに近い状態であることが望ま
しい。そこで、炭素繊維束には、通常、サイジング処理
を施し収束性を付与して使用していた。炭素繊維束をサ
イジング処理するために、例えば、特公昭５７−４９６
７５号公報、特公平１−２７２８６７公報や特公平４−
７０４２４号公報には、水分散型エマルジョンのエポキ
シ系サイジング剤や水溶液型サイジング剤が提案されて
いる。2. Description of the Related Art Carbon fibers are excellent in their characteristics.
Widely used for plastic reinforcement in wide fields such as aerospace industry, industry, sports. In order to use carbon fibers for reinforcing plastics, usually, a bundle of carbon fibers is impregnated with a thermosetting resin such as an epoxy resin or an unsaturated polyester resin which forms a matrix, followed by molding. By the way, in order for carbon fibers to efficiently improve the mechanical properties of the reinforced plastic under desired conditions, it is necessary that the carbon fiber bundles are uniformly spread in the plastic. On the other hand, since carbon fibers have poor convergence, there is a problem that workability in their manufacturing and processing steps is extremely poor unless they are subjected to any treatment, and many fluffs are generated and damaged. To improve workability, the carbon fiber bundle should be used. However, because it hinders the opening of carbon fibers in plastics and hinders the reinforcing effect of carbon fibers, carbon fiber bundles are
It is desirable that the state is substantially nothing or close to it. Therefore, the carbon fiber bundle is usually subjected to a sizing treatment so as to have a converging property before being used. For sizing carbon fiber bundles, for example, Japanese Patent Publication No. 57-496
Japanese Patent No. 75, Japanese Patent Publication No. 1-272867 and Japanese Patent Publication No. 4-
Japanese Patent No. 70424 proposes an epoxy-based sizing agent for an aqueous dispersion type emulsion and an aqueous solution-type sizing agent.
【０００３】[0003]
【発明が解決しようとする課題】しかし、サイジング処
理は、当然のことながら、炭素繊維束の開繊を妨げる。
そこで、サイジング処理した炭素繊維束の開繊性を改善
するため、例えば、特開平１−２９２０３８号公報に記
載されているような幅の広い炭素繊維束の提案などがな
されている。しかし、たとえば、幅の広い炭素繊維束の
形態を保持するには、多量のサイジング剤を付着させる
必要がある。サイジング剤を多量に付着させると、炭素
繊維が相互に接着され、炭素繊維束に補強すべきマトリ
ックス樹脂を含浸しても、マトリックス樹脂が炭素繊維
束の中まで浸透しにくくなってしまう。このような炭素
繊維束の外周に樹脂が多いプリプレグを用いて成形して
も、成形体からの樹脂のフロー量が多くなったり、積層
したプリプレグ同士が成形中にずれたりするために、目
的の品質の成形物を製造することができない。本発明
は、実質的に無より、またはそれに近い炭素繊維束であ
りながら、収束性を有して毛羽の発生が少なく、マトリ
ックス樹脂が内部まで浸透して樹脂フローが少なく、か
つ成形時にずれを生じない、炭素繊維束およびプリプレ
グの提供を目的とする。However, the sizing treatment naturally hinders the opening of the carbon fiber bundle.
Therefore, in order to improve the spreadability of the carbon fiber bundle subjected to the sizing treatment, for example, a proposal of a wide carbon fiber bundle as described in JP-A-1-292038 has been made. However, for example, in order to maintain the shape of the wide carbon fiber bundle, it is necessary to attach a large amount of the sizing agent. When a large amount of the sizing agent is attached, the carbon fibers are adhered to each other, and even if the carbon fiber bundle is impregnated with the matrix resin to be reinforced, it becomes difficult for the matrix resin to penetrate into the carbon fiber bundle. Even if a prepreg containing a large amount of resin is formed on the outer periphery of such a carbon fiber bundle, the flow amount of the resin from the formed body becomes large, or the prepregs that are laminated are misaligned during forming. Unable to produce quality moldings. INDUSTRIAL APPLICABILITY The present invention is a carbon fiber bundle that is substantially nothing or close to it, but has convergence and has less fluff, matrix resin penetrates to the inside to reduce resin flow, and there is a deviation during molding. The purpose is to provide a carbon fiber bundle and a prepreg that do not occur.
【０００４】[0004]
【課題を解決するための手段】本発明者は、前記の課題
を解決するために、各種のサイジング剤と炭素繊維束の
形態について、その効果を確かめながら試行錯誤した結
果、少量の使用で大きな効果を有するサイジング剤を見
出だし、かつ、そのサイジング剤を使用する際の好まし
い炭素繊維束の断面寸法を確かめ、本発明を完成するこ
とができた。In order to solve the above-mentioned problems, the present inventor has conducted trial and error on various sizing agents and forms of carbon fiber bundles while confirming their effects, and as a result, a large amount can be obtained by using a small amount. The present invention has been completed by finding an effective sizing agent and confirming the preferable cross-sectional dimension of the carbon fiber bundle when the sizing agent is used.
【０００５】本発明においては、次の一般式（１）、
（２）または（３）で示される化合物のうち、少なくと
も１種の化合物を、炭素繊維束重量に対し、０．１〜
０．５重量％付着させ、かつ、炭素繊維束の厚みに対す
る幅が、１５〜２５０であることを特徴とする炭素繊維
束を提供する。In the present invention, the following general formula (1)
Of the compounds represented by (2) or (3), at least one compound is added in an amount of 0.1 to 0.1% by weight of the carbon fiber bundle.
Provided is a carbon fiber bundle which is adhered at 0.5% by weight and has a width with respect to the thickness of the carbon fiber bundle of 15 to 250.
【０００６】[0006]
【化４】 [Chemical 4]
【０００７】[0007]
【化５】 [Chemical 5]
【０００８】[0008]
【化６】 （ただし、前記の各一般式中、Ｒ1 はＨまたはＯＨ、ｍ
＋ｎは８〜５０である。）そして、エポキシ樹脂と硬化
剤とからなるエポキシ樹脂組成物に、前記の炭素繊維束
に含浸せしめて構成されているプリプレグを提供する。[Chemical 6] (However, in each of the above general formulas, R 1 is H or OH, m
+ N is 8 to 50. ) Then, there is provided a prepreg configured by impregnating the carbon fiber bundle with an epoxy resin composition comprising an epoxy resin and a curing agent.
【０００９】[0009]
【作用と実施態様例】以下、本発明についてさらに詳細
に説明する。本発明が対象にする炭素繊維の種類に格別
の制限はなく、黒鉛繊維と称される繊維をも含まれる。ACTION AND EXAMPLE OF THE INVENTION The present invention will be described in more detail below. The type of carbon fiber targeted by the present invention is not particularly limited, and a fiber called graphite fiber is also included.
【００１０】まず、本発明の炭素繊維束に付着させる一
般式（１）〜（３）で示される化合物、すなわち、サイ
ジング剤（以下、本サイジング剤という）について説明
する。ただし、以下に説明する作用は、それぞれが単独
ではなく、相互に影響し合いながら奏されるものであ
る。本発明が目的としている効果は、まず、一般式
（１）〜（３）で示されるビスフェノールＡのポリエチ
レンオキシドまたは／およびポリプロピレンオキシド付
加物の適量を炭素繊維に付着させることによって、得ら
れることが見出だされたのである。この付加されている
ポリエチレンオキシドまたは／およびポリプロピレンオ
キシドが、炭素繊維に平滑性を与え、摩擦係数を低下さ
せる作用があり、炭素繊維の毛羽立ちを押さえているも
のと考えられる。一方、ビスフェノールＡ部はマトリッ
クス樹脂との相溶性を向上させる作用があると考えられ
る。また、上記の各成分が、共重合された状態にあるの
で、各々単一成分を混合して用いる場合に比べてサイジ
ング剤の粘性特性が調整可能となり、繊維の収束性を自
由に変えることができる。First, the compounds represented by the general formulas (1) to (3) to be attached to the carbon fiber bundle of the present invention, that is, the sizing agent (hereinafter referred to as the present sizing agent) will be described. However, the actions described below are not independent of each other, but are exerted while mutually affecting each other. The effect aimed at by the present invention can be obtained by first attaching an appropriate amount of the polyethylene oxide or / and polypropylene oxide adduct of bisphenol A represented by the general formulas (1) to (3) to the carbon fiber. It was found. It is considered that the added polyethylene oxide and / or polypropylene oxide has the effect of imparting smoothness to the carbon fiber and reducing the friction coefficient, and suppresses the fluffing of the carbon fiber. On the other hand, it is considered that the bisphenol A part has an effect of improving the compatibility with the matrix resin. Further, since the above components are in a copolymerized state, the viscosity characteristics of the sizing agent can be adjusted as compared with the case where a single component is mixed and used, and the fiber convergence can be freely changed. it can.
【００１１】本サイジング剤において、一般式（１）〜
（３）中、ｍ＋ｎが８未満では、水と混ざりにくくなる
ので好ましくない。また、ｍ＋ｎが５０を越えるとマト
リックス樹脂との相溶性が低下してマトリックス樹脂と
炭素繊維との接着性が低下し、炭素繊維の補強効果を低
下させる。そして、一般式（１）〜（３）式中のＲ1
を、ＨまたはＯＨにすると、Ｒ1 が下式で示される末端
基をもつポリグリシジルエーテル類に比べて、サイジン
グ剤の付着量が低い場合でも摩擦係数を低下させる効果
が高く、ガイドロール等の糸のしごきに対して、毛羽の
発生を押さえる作用が大きい。In the present sizing agent, general formulas (1) to
In (3), when m + n is less than 8, it is difficult to mix with water, which is not preferable. On the other hand, when m + n exceeds 50, the compatibility with the matrix resin is lowered, the adhesiveness between the matrix resin and the carbon fibers is lowered, and the reinforcing effect of the carbon fibers is lowered. And R1 in the general formulas (1) to (3)
Is H or OH, the effect of lowering the friction coefficient is high even when the amount of the sizing agent attached is low, as compared with polyglycidyl ethers having an end group in which R1 is represented by the following formula. It has a great effect on suppressing fluff formation against ironing.
【００１２】[0012]
【化７】 次に、炭素繊維束に付与する本サイジング剤量を説明す
る。本サイジング剤の炭素繊維束に対する付着量は、炭
素繊維束の重量に対し、０．１〜０．５重量％、好まし
くは、０．２〜０．４重量％である。付着量が０．５重
量％を越えると炭素繊維束内の単繊維同士の接着が強
く、プリプレグに加工する際、マトリックス樹脂の含浸
が不十分となり、成形時の樹脂フロー量が増大する。さ
らに、積層したプリプレグが所定の位置からずれ易く、
設計通りの成形品が得られないおそれがある。本サイジ
ング剤の付着量が０．１重量％に達しないと、ガイドバ
ーやロールなどの炭素繊維束と装置との接触部で摩擦係
数が大きくなり、毛羽や糸切れの発生が多くなるので好
ましくない。[Chemical 7] Next, the amount of the present sizing agent applied to the carbon fiber bundle will be described. The amount of the present sizing agent attached to the carbon fiber bundle is 0.1 to 0.5% by weight, preferably 0.2 to 0.4% by weight, based on the weight of the carbon fiber bundle. When the adhesion amount exceeds 0.5% by weight, the single fibers in the carbon fiber bundle are strongly adhered to each other, the matrix resin is not sufficiently impregnated when the prepreg is processed, and the resin flow amount during molding increases. Furthermore, the laminated prepreg easily shifts from a predetermined position,
It may not be possible to obtain a molded product as designed. If the adhered amount of the present sizing agent does not reach 0.1% by weight, the friction coefficient becomes large at the contact portion between the carbon fiber bundle such as a guide bar or roll and the device, and fluff or yarn breakage increases, which is preferable. Absent.
【００１３】炭素繊維束の形態について説明する。本発
明が対象にする炭素繊維束は、本発明の目的からして、
実質的に無より、または無よりに近いものである。本サ
イジング剤を付着させた本発明の炭素繊維束の断面形状
は、炭素繊維束の使用目的、加工工程、フィラメント数
や繊度にもとづいて決めることができるが、一般的に
は、炭素繊維束の厚みに対する幅は、１５〜２５０、好
ましくは２０〜２００、さらに好ましくは、２５〜１５
０の範囲にする。炭素繊維束断面の幅（Ｄ：ｍｍ）は実
測値であり、厚み（ｔ：ｍｍ）は、次式で決められる値
である。The form of the carbon fiber bundle will be described. The carbon fiber bundle targeted by the present invention is, for the purpose of the present invention,
Substantially nothing or close to nothing. The cross-sectional shape of the carbon fiber bundle of the present invention to which the present sizing agent is attached can be determined based on the purpose of use of the carbon fiber bundle, the processing step, the number of filaments and the fineness of the carbon fiber bundle. The width to thickness is 15 to 250, preferably 20 to 200, more preferably 25 to 15
Set to the range of 0. The width (D: mm) of the cross section of the carbon fiber bundle is a measured value, and the thickness (t: mm) is a value determined by the following equation.
【００１４】厚み（ｔ）＝（炭素繊維束のフィラメント
数×単繊維径）／（Ｄ／単繊維径） 炭素繊維束の厚みに対する幅が、２０未満では炭素繊維
束が厚いため、プリプレグを製造する際に炭素繊維束が
広がりにくく、目付の低い薄物プリプレグを作ることが
むつかしい。また、その値が２５０以上では、炭素繊維
束の幅が広すぎてボビン上に巻き上げることがむずかし
くなるので、好ましくない。Thickness (t) = (number of filaments of carbon fiber bundle × single fiber diameter) / (D / single fiber diameter) If the width with respect to the thickness of the carbon fiber bundle is less than 20, the carbon fiber bundle is thick, so a prepreg is produced. It is difficult to make a thin prepreg with a low basis weight, because the carbon fiber bundles do not spread easily. Further, if the value is 250 or more, the width of the carbon fiber bundle is too wide and it is difficult to wind the carbon fiber bundle on the bobbin, which is not preferable.
【００１５】炭素繊維束に本サイジング剤を付着させる
方法に制限はなく、たとえば、ローラコート法、スプレ
ーコート法などを用いることができる。所定量の本サイ
ジング剤が、炭素繊維束に均一に付着するように、サイ
ジング液の濃度、温度、炭素繊維束の張力などを制御す
る。本サイジング剤を付与した後の炭素繊維束は、乾燥
されるが、通常、１００〜２５０℃、２０〜９００秒の
範囲で乾燥するのがよい。乾燥時間にもよるが、乾燥温
度が２５０℃を越えるとサイジング剤に熱劣化を生じ易
くなる。また、温度にもよるが、乾燥処理時間が９００
秒を越えると熱劣化が生じ易くなる。There is no limitation on the method of attaching the present sizing agent to the carbon fiber bundle, and for example, a roller coating method, a spray coating method or the like can be used. The concentration of the sizing liquid, the temperature, the tension of the carbon fiber bundle, etc. are controlled so that a predetermined amount of the present sizing agent is uniformly attached to the carbon fiber bundle. The carbon fiber bundle after the application of the present sizing agent is dried, but it is usually preferable to dry the carbon fiber bundle in the range of 100 to 250 ° C. and 20 to 900 seconds. Although it depends on the drying time, if the drying temperature exceeds 250 ° C., the sizing agent is likely to be thermally deteriorated. Also, depending on the temperature, the drying treatment time is 900
If it exceeds the second, thermal deterioration easily occurs.
【００１６】本発明のプリプレグは、前記した炭素繊維
束を一方向に引き揃えたものを、または当該炭素繊維束
からなるクロスにマトリックス樹脂として、通常用いら
れるエポキシ樹脂組成物に必要に応じて硬化促進剤を添
加したものを、定法により含浸して得ることができる。The prepreg of the present invention is prepared by aligning the above-mentioned carbon fiber bundles in one direction, or as a matrix resin for a cloth comprising the carbon fiber bundles, and curing the epoxy resin composition which is usually used, if necessary. It can be obtained by impregnating a product to which a promoter is added by a conventional method.
【００１７】[0017]
【実施例】以下、本発明を実施例によって具体的に説明
する。なお、実施例中の炭素繊維束の評価方法は、次の
通りである。EXAMPLES The present invention will be specifically described below with reference to examples. The evaluation method of the carbon fiber bundles in the examples is as follows.
【００１８】（１）擦過毛羽数 直径１０ｍｍのステンレス棒（クロムめっき、表面粗さ
１〜１．５Ｓ）５本を５０ｍｍ間隔で各々平行、かつ、
これらの棒の表面を炭素繊維束が１２０度の接触角で接
触しながら通過するように、棒をジグザクに配置した擦
過装置を用いた。入口側の炭素繊維束に１デニール当り
０．０９ｇの張力を与え、３ｍ／分の速度で、この装置
を通過させた。側面から炭素繊維束に対し直角にレーザ
ー光線を照射し、毛羽数をカウントする毛羽検出装置を
用いた。(1) Number of Scraped Feathers Five stainless rods (chromium plating, surface roughness 1 to 1.5S) having a diameter of 10 mm are parallel to each other at 50 mm intervals, and
A rubbing device was used in which the rods were arranged in a zigzag manner so that the carbon fiber bundles passed through the surfaces of these rods with a contact angle of 120 degrees. The carbon fiber bundle on the inlet side was given a tension of 0.09 g per denier and passed through this device at a speed of 3 m / min. A fluff detector was used which counts the number of fluffs by irradiating a laser beam perpendicularly to the carbon fiber bundle from the side surface.
【００１９】（２）摩擦係数 擦過毛羽数測定の際の炭素繊維束入口側と出口側の張力
を測定し、次式によって求めた。(2) Coefficient of Friction The tension on the inlet side and the outlet side of the carbon fiber bundle during the measurement of the number of scratched fluff was measured and determined by the following formula.
【００２０】 摩擦係数＝（３／８π）ｌｎ（Ｔ2 ／Ｔ1 ） ただし、Ｔ1 ：糸条入側張力 Ｔ2 ：糸条出側張力 （３） プリプレグ下限目付 プリプレグ下限目付（以下、ＰＰ下限目付という）は、
図１に模式的に示したドラムワインド装置を用い、一方
向プリプレグを製造し、プリプレグの外観を良好に製造
できる下限の目付で表示した。なお、図中、１は炭素繊
維ボビン、２は炭素繊維ボビンから引き出された炭素繊
維束、３は樹脂含浸槽、４はシゴキバー、５は巻取りを
示す。Friction coefficient = (3 / 8π) ln (T2 / T1) where T1: yarn entry side tension T2: yarn exit side tension (3) prepreg lower limit weight prepreg lower limit weight (hereinafter referred to as PP lower limit weight) Is
A unidirectional prepreg was manufactured using the drum winder schematically shown in FIG. 1, and the appearance of the prepreg is shown by the lower limit weight that allows good manufacture. In the figure, 1 is a carbon fiber bobbin, 2 is a carbon fiber bundle drawn from the carbon fiber bobbin, 3 is a resin impregnation tank, 4 is a bar, and 5 is a winding.
【００２１】（４） 樹脂フロー量 エピコート８２８（ビスフェノールＡグリシジルエーテ
ル（エポキシ当量１８９）：油化シェル・エポキシ
（株）製）１００重量部とジシアンジアミド１０重量部
および３（３，４−ジクロロフェニル）−１，１−ジメ
チル尿素５重量部とを均一に混合し、一液硬化性エポキ
シ樹脂を得た。これを炭素繊維束に含浸させ、Ｂステー
ジ化してプリプレグを製造した。プリプレグを１００ｍ
ｍ×１００ｍｍに切り出し、繊維軸方向に対して０度、
９０度、０度、９０度に配向して積層し、重量（Ｗ1 ）
を測定した。積層したプリプレグの両面に多孔性離型フ
ィルム（ポリ四ふっ化エチレンフィルム）１枚、ガラス
クロス（＃１８１）３枚の順に合わせた。温度１３０
℃、圧力７ｋｇｆ／ｃｍ2 、加圧時間３０分の硬化条件
で成形し、プリプレグの重量（Ｗ2 ）を測定した。硬化
前の重量Ｗ1 と硬化後の重量Ｗ2 とから次式より、樹脂
フローを求めた。(4) Amount of resin flow Epicoat 828 (bisphenol A glycidyl ether (epoxy equivalent 189): manufactured by Yuka Shell Epoxy Co., Ltd.) 100 parts by weight, dicyandiamide 10 parts by weight and 3 (3,4-dichlorophenyl)- 5 parts by weight of 1,1-dimethylurea was uniformly mixed to obtain a one-component curable epoxy resin. A carbon fiber bundle was impregnated with this, and the prepreg was manufactured by B-stage formation. 100m prepreg
Cut out to m x 100 mm, 0 degree to the fiber axis direction,
Oriented at 90 degrees, 0 degrees, and 90 degrees, laminated and weighed (W 1 )
Was measured. On each side of the laminated prepreg, one porous release film (polytetrafluoroethylene film) and three glass cloths (# 181) were laminated in this order. Temperature 130
Molding was carried out at a temperature of 7 ° C., a pressure of 7 kgf / cm 2 and a curing time of 30 minutes, and the weight (W 2 ) of the prepreg was measured. The resin flow was determined from the weight W 1 before curing and the weight W 2 after curing from the following equation.
【００２２】樹脂フロー量（％）＝｛（Ｗ1 −Ｗ2 ）／
Ｗ1 ｝×１００ （５） プリプレグのずれ量 上記（４）と同様にしてプリプレグを製造した。このプ
リプレグをテーパー角度が０．２０５度の金型棒（長さ
１１２０ｍｍ）に積層した。積層構成は、金型の長さ方
向に対し、プリプレグの繊維軸が４０度、−４０度、４
０度になるように積層し（以下、バイアス層という）、
さらに、０度のプリプレグを３回積層（以下、ストレー
ト層という）した。その後、テープ強力３．８kgf/テー
プ幅の条件でテープを巻き、１３０℃、３０分で硬化さ
せた。硬化後、先端が細い方のバイヤス層とストレート
層のずれを測定し、プリプレグのずれ量を求めた。Resin flow rate (%) = {(W 1 -W 2 ) /
W 1 } × 100 (5) Prepreg deviation amount A prepreg was manufactured in the same manner as in (4) above. This prepreg was laminated on a mold bar (length 1120 mm) having a taper angle of 0.205 degrees. The laminated structure is such that the fiber axis of the prepreg is 40 degrees, -40 degrees, and 4 with respect to the length direction of the mold.
Layered so that it becomes 0 degrees (hereinafter referred to as the bias layer),
Further, a 0 degree prepreg was laminated three times (hereinafter referred to as a straight layer). Then, the tape was wound under the condition of tape strength of 3.8 kgf / tape width and cured at 130 ° C. for 30 minutes. After the curing, the deviation between the bias layer and the straight layer having the thinner tip was measured to obtain the deviation amount of the prepreg.
【００２３】（６）層間せん断強度（ＩＬＳＳ） マトリックスとしてエピコート８２８（既出）を用い、
ＡＳＴＭ Ｄ−２３４４に準じて測定した。(6) Interlaminar Shear Strength (ILSS) Using Epicoat 828 (existing) as a matrix,
It was measured according to ASTM D-2344.
【００２４】実施例 １ 前記の一般式（１）において、Ｒ1 をＯＨ、ｍ＝５、ｎ
＝５としたビスフェノールＡエチレンオキシド１０モル
付加物を本サイジング剤として用い、炭素繊維束を製造
した。炭素繊維束への本サイジング剤の付着量が０．４
重量％になるように、水分散エマルジョンを調合した。
調合したエマルジョンに、単繊維の繊度が０．６デニー
ル、フィラメント数が１２０００本からなる炭素繊維束
を、ディップローラを介して浸漬した後、熱風循環型乾
燥機を用い１５０℃、１分間、乾燥し、本発明の炭素繊
維束を得た。この炭素繊維束の幅と厚みの比（Ｄ／
ｔ）、擦過毛羽数、摩擦係数、ＰＰ下限目付、樹脂フロ
ー量、プリプレグのずれ量およびＩＬＳＳを測定した。
その結果を表１に示す。Example 1 In the above general formula (1), R1 is OH, m = 5, n
A bisphenol A ethylene oxide 10 mol adduct of 5 was used as the present sizing agent to produce a carbon fiber bundle. The amount of the sizing agent attached to the carbon fiber bundle is 0.4.
A water-dispersed emulsion was prepared so as to have a weight percentage.
A carbon fiber bundle having a single fiber fineness of 0.6 denier and a filament number of 12,000 is immersed in the prepared emulsion through a dip roller, and then dried at 150 ° C. for 1 minute using a hot air circulation dryer. Then, a carbon fiber bundle of the present invention was obtained. The width-to-thickness ratio (D /
t), the number of fluffs, the coefficient of friction, the PP lower limit weight, the resin flow amount, the prepreg deviation amount, and the ILSS were measured.
The results are shown in Table 1.
【００２５】実施例 ２ 本サイジング剤に、一般式（１）のＲ1 をＨ、ｍ＝５、
ｎ＝５とした、ビスフェノールＡエチレンオキシド１０
モル付加物を用いた以外は、実施例１と同様にして本発
明の炭素繊維束を得た。得られた炭素繊維束について、
実施例１と同じ評価を行った。その結果を表１に示す。Example 2 This sizing agent was prepared by adding R 1 of the general formula (1) to H, m = 5,
Bisphenol A ethylene oxide 10 with n = 5
A carbon fiber bundle of the present invention was obtained in the same manner as in Example 1 except that the mole adduct was used. Regarding the obtained carbon fiber bundle,
The same evaluation as in Example 1 was performed. The results are shown in Table 1.
【００２６】実施例 ３ 本サイジング剤に、一般式（２）のＲ1 をＯＨ、ｍ＝１
２、ｎ＝１２とした、ビスフェノールＡプロピレンオキ
シド２４モル付加物の水分散エマルジョンを用いた以外
は、実施例１と同様にして本発明の炭素繊維束を得た。
得られた炭素繊維束について、実施例１と同じ評価を行
った。その結果を表１に示す。Example 3 In the present sizing agent, R 1 in the general formula (2) was OH, and m = 1.
A carbon fiber bundle of the present invention was obtained in the same manner as in Example 1 except that a water-dispersed emulsion of bisphenol A propylene oxide 24 mol adduct having n = 12 was used.
The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The results are shown in Table 1.
【００２７】実施例 ４ 本サイジング剤に、一般式（３）式のＲ1 をＯＨ、ｍ＝
１５、ｎ＝１５としたビスフェノールＡエチレンオキシ
ド１５モルプロピレンオキシド１５モル付加物の水分散
エマルジョンを用いた以外は、実施例１と同様にして本
発明の炭素繊維束を得た。得られた炭素繊維束につい
て、実施例１と同じ評価を行った。その結果を表１に示
す。Example 4 R1 of the general formula (3) was added to OH and m =
A carbon fiber bundle of the present invention was obtained in the same manner as in Example 1, except that an aqueous dispersion emulsion of bisphenol A ethylene oxide 15 mol and propylene oxide 15 mol adduct having n = 15 was used. The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The results are shown in Table 1.
【００２８】比較例 １ 次の（ａ）、（ｂ）、（ｃ）を高粘度乳化装置に仕込
み、５０〜６０℃で均一にした。これに次の（ｄ）のう
ち１０％を加え、４０℃以下で充分撹拌し、乳化転相さ
せた。転相後、残りの（ｄ）を徐々に添加し、均一なエ
マルジョンを得た。 （ａ）３０重量部のエピコート８
２８ （ｂ）２０重量部の、ビスフェノールＡエチレンオキシ
ド２モル付加物（２モル）とマレイン酸（１．５モル）
とセバチン酸（０．５モル）との縮合物（酸価５５） （ｃ）５重量部のポリオキシエチレン（７０モル）スチ
レン化（５モル）クミルフェノール （ｄ）４５重量部の水 得られたエマルジョンをサイジングに用いた以外は、実
施例１と同様にして炭素繊維束を得た。得られた炭素繊
維束について実施例１と同じ評価を行った。評価結果を
表１に示した。Comparative Example 1 The following (a), (b), and (c) were charged in a high-viscosity emulsifying apparatus and homogenized at 50-60 ° C. To this, 10% of the following (d) was added, and the mixture was sufficiently stirred at 40 ° C. or lower to emulsify the phase. After phase inversion, the remaining (d) was gradually added to obtain a uniform emulsion. (A) 30 parts by weight of Epicoat 8
28 (b) 20 parts by weight of 2 mol of bisphenol A ethylene oxide adduct (2 mol) and maleic acid (1.5 mol)
Condensation product of acid and sebacic acid (0.5 mol) (acid value 55) (c) 5 parts by weight of polyoxyethylene (70 mol) styrenated (5 mol) cumylphenol (d) 45 parts by weight of water A carbon fiber bundle was obtained in the same manner as in Example 1 except that the obtained emulsion was used for sizing. The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The evaluation results are shown in Table 1.
【００２９】比較例 ２ サイジング剤に、一般式（１）のＲ1 がComparative Example 2 R 1 of the general formula (1) was added to the sizing agent.
【００３０】[0030]
【化８】 ｍ＝５、ｎ＝５であるビスフェノールＡエチレンオキシ
ド１０モル付加物を用いた以外は、実施例１と同様にし
て炭素繊維束を得た。得られた炭素繊維束について実施
例１と同じ評価を行った。評価結果を表１に示した。[Chemical 8] A carbon fiber bundle was obtained in the same manner as in Example 1 except that a 10 mol adduct of bisphenol A ethylene oxide with m = 5 and n = 5 was used. The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The evaluation results are shown in Table 1.
【００３１】比較例 ３ 実施例１に用いたのと同じサイジング剤を用い、サイジ
ング剤の付着量を炭素繊維束に対し、０．０５重量％に
した以外は、実施例１と同様にして炭素繊維束を得た。
得られた炭素繊維束について実施例１と同じ評価を行っ
た。評価結果を表１に示した。Comparative Example 3 Carbon was prepared in the same manner as in Example 1 except that the same sizing agent as that used in Example 1 was used and the amount of the sizing agent deposited was 0.05% by weight based on the carbon fiber bundle. A fiber bundle was obtained.
The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The evaluation results are shown in Table 1.
【００３２】比較例 ４ 実施例１に用いたのと同じサイジング剤を用い、サイジ
ング剤の付着量を炭素繊維束に対し、０．６重量％にし
た以外は、実施例１と同様にして炭素繊維束を得た。得
られた炭素繊維束について実施例１と同じ評価を行っ
た。評価結果を表１に示した。Comparative Example 4 Carbon was prepared in the same manner as in Example 1 except that the same sizing agent as that used in Example 1 was used and the amount of the sizing agent deposited was 0.6% by weight based on the carbon fiber bundle. A fiber bundle was obtained. The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The evaluation results are shown in Table 1.
【００３３】比較例 ５ 実施例１に用いたのと同じサイジング剤を用い、Ｄ／ｔ
を１０にした以外は、実施例１と同様にして炭素繊維束
を得た。得られた炭素繊維束について実施例１と同じ評
価を行った。評価結果を表１に示した。Comparative Example 5 Using the same sizing agent used in Example 1, D / t
A carbon fiber bundle was obtained in the same manner as in Example 1 except that 10 was used. The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The evaluation results are shown in Table 1.
【００３４】比較例 ６ 実施例１に用いたのと同じサイジング剤を用い、Ｄ／ｔ
が３００になるようにして炭素繊維束を製造したが、ボ
ビンに巻き取ることができなかった。Comparative Example 6 Using the same sizing agent used in Example 1, D / t
The carbon fiber bundle was manufactured so as to be 300, but could not be wound on the bobbin.
【００３５】比較例 ７ サイジング剤に、一般式（１）のＲ1 をＯＨ、ｍ＝３
０、ｎ＝３０にしたビスフェノールＡエチレンオキシド
６０モル付加物の水分散エマルジョンを用いた以外は、
実施例１と同様にして炭素繊維束を得た。得られた炭素
繊維束について実施例１と同じ評価を行った。評価結果
を表１に示した。COMPARATIVE EXAMPLE 7 R1 of the general formula (1) was OH and m = 3 as a sizing agent.
0, n = 30 except that a water-dispersed emulsion of 60 mol of bisphenol A ethylene oxide adduct was used.
A carbon fiber bundle was obtained in the same manner as in Example 1. The same evaluation as in Example 1 was performed on the obtained carbon fiber bundle. The evaluation results are shown in Table 1.
【００３６】比較例 ８ サイジング剤に、一般式（１）のＲ1 をＯＨ、ｎ＋ｍを
４にしたビスフェノールＡエチレンオキシド４モル付加
物を用いようとしたが、このものは、相分離して水に不
溶であり、サイジング剤として使用することができなか
った。Comparative Example 8 An attempt was made to use a bisphenol A ethylene oxide 4 mol adduct having R 1 of OH and n + m of 4 of the general formula (1) as a sizing agent, which was phase-separated and insoluble in water. And could not be used as a sizing agent.
【００３７】[0037]
【表１】 [Table 1]
【００３８】[0038]
【発明の効果】本発明の炭素繊維束は、少ない使用量で
大きな効果を奏するサイジング剤を使用しているので、
サイジング付着量およびＤ／ｔを好ましい範囲に保つこ
とにより、実質的に無より、またはそれに近い炭素繊維
束でありながら、収束性を有して耐擦過性にすぐれ、毛
羽の発生が少なくい。また、炭素繊維束中の単繊維同士
の接着が少なく、マトリックス樹脂との相溶性がよく、
広がり性にすぐれているので、マトリックス樹脂が内部
まで浸透して樹脂フローが少なくなり、かつプリプレグ
のずれがない。従って、プリプレグに加工して使用すれ
ば、設計どうりに正確な成形体が得られる。また薄物プ
リプレグへの加工が容易で、高次加工性に優れた複合材
料用炭素繊維束が提供できるという、顕著な効果を有す
るものである。The carbon fiber bundle of the present invention uses a sizing agent which exerts a great effect even when used in a small amount.
By keeping the sizing adhesion amount and D / t within the preferable ranges, the carbon fiber bundle is substantially nothing or close to it, but it has a converging property, excellent abrasion resistance, and less fluffing. Also, there is little adhesion between the single fibers in the carbon fiber bundle, good compatibility with the matrix resin,
Due to its excellent spreadability, the matrix resin penetrates to the inside and the resin flow is reduced, and there is no deviation of the prepreg. Therefore, if it is processed into a prepreg and used, a molded product having an accurate design can be obtained. Further, it has a remarkable effect that it can be easily processed into a thin prepreg and a carbon fiber bundle for a composite material having excellent high-order processability can be provided.
【図１】 プリプレグ下限目付の測定に使用した装置の
模式図。FIG. 1 is a schematic diagram of an apparatus used for measurement of a prepreg lower limit weight.
１：炭素繊維ボビン ２：炭素繊維束 ３：樹脂含
浸槽 ４：シゴキバー ５：巻取り1: Carbon fiber bobbin 2: Carbon fiber bundle 3: Resin impregnation tank 4: Shigoki bar 5: Winding
Claims (2)
示される化合物のうち、少なくとも１種の化合物を、炭
素繊維束重量に対し、０．１〜０．５重量％付着させ、
かつ、炭素繊維束の厚みに対する炭素繊維束の幅が、２
０〜２５０であることを特徴とする炭素繊維束。 【化１】 【化２】 【化３】 （ただし、前記の各一般式中、Ｒ1 はＨまたはＯＨ、ｍ
＋ｎは８〜５０である。）1. At least one compound selected from the compounds represented by the following general formula (1), (2) or (3) is 0.1 to 0.5% by weight based on the weight of the carbon fiber bundle. Attach
Moreover, the width of the carbon fiber bundle is 2 with respect to the thickness of the carbon fiber bundle.
A carbon fiber bundle having a size of 0 to 250. [Chemical 1] [Chemical 2] [Chemical 3] (However, in each of the above general formulas, R 1 is H or OH, m
+ N is 8 to 50. )
樹脂組成物に、請求項１に記載の炭素繊維束に含浸せし
めてなることを特徴とするプリプレグ。2. A prepreg obtained by impregnating the carbon fiber bundle according to claim 1 with an epoxy resin composition comprising an epoxy resin and a curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15668793A JP2812147B2 (en) | 1993-06-28 | 1993-06-28 | Carbon fiber bundle and prepreg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15668793A JP2812147B2 (en) | 1993-06-28 | 1993-06-28 | Carbon fiber bundle and prepreg |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH079444A true JPH079444A (en) | 1995-01-13 |
| JP2812147B2 JP2812147B2 (en) | 1998-10-22 |
Family
ID=15633137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15668793A Expired - Lifetime JP2812147B2 (en) | 1993-06-28 | 1993-06-28 | Carbon fiber bundle and prepreg |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2812147B2 (en) |
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| JP2812147B2 (en) | 1998-10-22 |
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