JP2962081B2 - Method for producing reinforcing fiber for resin-based composite material - Google Patents
Method for producing reinforcing fiber for resin-based composite materialInfo
- Publication number
- JP2962081B2 JP2962081B2 JP334393A JP334393A JP2962081B2 JP 2962081 B2 JP2962081 B2 JP 2962081B2 JP 334393 A JP334393 A JP 334393A JP 334393 A JP334393 A JP 334393A JP 2962081 B2 JP2962081 B2 JP 2962081B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- resin
- composite material
- based composite
- reinforcing fiber
- 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)
- Chemical Or Physical Treatment Of Fibers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、繊維強化プラスチック
（ＦＲＰ，ＦＲＴＰ）などの樹脂基複合材料に用いられ
る強化繊維の製造方法に関する。本発明の製造方法によ
り得られる強化繊維によれば、マトリックス樹脂との結
合力が向上する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a reinforcing fiber used for a resin-based composite material such as fiber reinforced plastic (FRP, FRTP) . According to the production method of the present invention,
According to the obtained reinforcing fibers, bonding with the matrix resin
The resultant force improves.
【０００２】[0002]
【従来の技術】樹脂基複合材料には、従来よりガラス繊
維、セラミックス繊維、カーボン繊維、ボロン繊維、芳
香族ポリアミド繊維などの強化繊維が用いられている。
ところが、このうちガラス繊維、セラミックス繊維など
の無機繊維は、有機物であるマトリックス樹脂との接着
力が弱く、得られるＦＲＰ成形体の強度が充分でないと
いう問題がある。2. Description of the Related Art Conventionally, reinforcing fibers such as glass fibers, ceramic fibers, carbon fibers, boron fibers, and aromatic polyamide fibers have been used as resin-based composite materials.
However, among these, inorganic fibers such as glass fibers and ceramic fibers have a problem that adhesion to a matrix resin, which is an organic substance, is weak, and the strength of an obtained FRP molded product is not sufficient.
【０００３】そこで従来より、カップリング剤で化学的
に処理された無機繊維を用いることが行われている。周
知のように、カップリング剤は一端に加水分解しやすい
基をもち、他端に樹脂と反応しやすい官能基を有する構
造になっている。そしてカップリング剤が無機繊維とマ
トリックス樹脂の間に介在して、接着性を向上させてい
る。[0003] Therefore, conventionally, inorganic fibers chemically treated with a coupling agent have been used. As is well known, the coupling agent has a structure that has a group that is easily hydrolyzed at one end and a functional group that easily reacts with the resin at the other end. And the coupling agent is interposed between the inorganic fiber and the matrix resin to improve the adhesiveness.
【０００４】ただ、カップリング剤での処理により接着
性が向上する理由は、化学的な反応によるのか物理的な
ものによるのかまだ不明な部分が多く、種々の説がある
のが現状である。However, there are still many unknown reasons why the treatment with a coupling agent improves the adhesiveness due to a chemical reaction or a physical one, and there are various theories at present.
【０００５】[0005]
【発明が解決しようとする課題】ところがカップリング
剤で処理された無機繊維であっても、ＦＲＰに用いた場
合に強化繊維の配向方向以外の方向に荷重が作用した場
合には、比較的容易に破壊が生じるという不具合があ
る。これは強化繊維とマトリックス樹脂との結合力が弱
いことに起因すると考えられ、結合強度の一層の向上が
望まれている。However, even when inorganic fibers are treated with a coupling agent, they are relatively easy to use when a load acts in a direction other than the orientation direction of the reinforcing fibers when used for FRP. There is a defect that destruction occurs. This is considered to be due to the weak bonding force between the reinforcing fiber and the matrix resin, and further improvement in the bonding strength is desired.
【０００６】本発明はこのような事情に鑑みてなされた
ものであり、強化繊維自体の改良により、強化繊維とマ
トリックス樹脂の結合強度を一層向上させることを目的
とする。The present invention has been made in view of such circumstances, and an object of the present invention is to further improve the bonding strength between a reinforcing fiber and a matrix resin by improving the reinforcing fiber itself.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決する請求
項１に記載の樹脂基複合材料用強化繊維の製造方法は、
カーボン繊維、カーボン粉末及び金属粉末から選ばれる
少なくとも一種よりなる発熱媒体とガラスビーズを素繊
維に付着させ、次いでマイクロ波を照射して発熱媒体を
発熱させることでガラスビーズを素繊維の表面に溶着す
ることを特徴とする。また請求項２に記載の樹脂基複合
材料用強化繊維の製造方法は、カーボン素繊維にガラス
ビーズを付着させ、次いでマイクロ波を照射してカーボ
ン素繊維を発熱させることでガラスビーズをカーボン素
繊維の表面に溶着することを特徴とする。さらに請求項
３に記載の樹脂基複合材料用強化繊維の製造方法は、カ
ーボン繊維、カーボン粉末及び金属粉末から選ばれる少
なくとも一種よりなる発熱媒体と水ガラスを混合して素
繊維に付着させ、次いでマイクロ波を照射して発熱媒体
を発熱させることで水ガラスを発泡させて素繊維の表面
に凹凸を形成することを特徴とする。 Means for Solving the Problems Claims for solving the above problems
Item 1. The method for producing a reinforcing fiber for a resin-based composite material according to item 1 ,
Selected from carbon fiber, carbon powder and metal powder
At least one type of heating medium and glass beads
Attached to the fiber, and then irradiated with microwaves to remove the heating medium
Weld the glass beads to the surface of the fiber by heating
Characterized in that that. The resin-based composite according to claim 2.
The method for producing reinforcing fibers for materials uses carbon fiber and glass
The beads are attached and then irradiated with microwaves to
The glass beads are converted to carbon
It is characterized by welding to the surface of the fiber. Further claims
The method for producing a reinforcing fiber for a resin-based composite material according to item 3
Carbon fiber and metal powder.
At least one kind of heating medium and water glass are mixed
Attach to the fiber, then irradiate microwaves to generate heat
The water glass is foamed by generating heat and the surface of the fiber
The method is characterized by forming irregularities on the surface.
【０００８】[0008]
【作用】本発明の製造方法により得られる樹脂基複合材
料用強化繊維は、素繊維表面にガラス質の凸部をもつ。
したがって樹脂基複合材料に用いた場合には、投錨効果
により素繊維とマトリックス樹脂との接合力が向上し、
複合材料の機械的強度が向上する。The reinforcing fiber for a resin-based composite material obtained by the production method of the present invention has a vitreous projection on the surface of the elementary fiber.
Therefore, when used in a resin-based composite material, the anchoring effect improves the bonding strength between the elementary fiber and the matrix resin,
The mechanical strength of the composite material is improved.
【０００９】[0009]
【実施例】以下、実施例により具体的に説明する。 （実施例１）図１に本発明の一実施例の樹脂基複合材料
用強化繊維を示す。この強化繊維は、ガラス繊維からな
る素繊維１と、素繊維１表面に形成されたガラス質の複
数の凸部２とから構成されている。以下、この強化繊維
を製造した方法を説明し、その構成の詳細な説明に代え
る。The present invention will be specifically described below with reference to examples. (Example 1) FIG. 1 shows a reinforcing fiber for a resin-based composite material according to one example of the present invention. The reinforcing fiber is composed of a fiber 1 made of glass fiber and a plurality of vitreous convex portions 2 formed on the surface of the fiber 1. Hereinafter, a method for producing the reinforcing fiber will be described, and the detailed description of the configuration will be replaced.
【００１０】ガラス素繊維１にカップリング剤及びバイ
ンダーを塗布する工程において、カップリング剤とバイ
ンダーの混練物中に平均粒径１０μｍのガラスビーズを
体積％で３０〜５０％混合し、それを素繊維１に塗布し
た。次いで１４００〜１５００℃に加熱することによ
り、ガラスビーズを素繊維１表面に溶着させて凸部２を
形成した。 （実施例２）図２に第２の実施例の樹脂基複合材料用強
化繊維を示す。この強化繊維は、ガラス繊維からなる素
繊維１と、素繊維１表面に形成されたガラス質の複数の
凸部２と、凸部２とともに素繊維１表面に接合されたカ
ーボン短繊維３と、から構成されている。以下、この強
化繊維を製造した方法を説明し、その構成の詳細な説明
に代える。In the step of applying a coupling agent and a binder to the glass fiber 1, glass beads having an average particle diameter of 10 μm are mixed in a kneaded mixture of the coupling agent and the binder in an amount of 30 to 50% by volume to obtain a raw material. Coated on fiber 1. Next, by heating to 1400 to 1500 ° C., the glass beads were welded to the surface of the elementary fiber 1 to form the convex portion 2. Embodiment 2 FIG. 2 shows a reinforcing fiber for a resin-based composite material according to a second embodiment. The reinforcing fibers include a fiber 1 made of glass fiber, a plurality of vitreous protrusions 2 formed on the surface of the fiber 1, short carbon fibers 3 bonded to the surface of the fiber 1 together with the protrusions 2, It is composed of Hereinafter, a method for producing the reinforcing fiber will be described, and the detailed description of the configuration will be replaced.
【００１１】実施例１と同様にガラス素繊維１にカップ
リング剤及びバインダーを塗布する工程において、カッ
プリング剤とバインダーの混練物中に平均粒径１０μｍ
のガラスビーズと、カーボン短繊維３とを体積比で１対
１、全体量で３０〜５０体積％混合し、それを素繊維１
に塗布した。そしてマイクロ波を５〜１０分間照射する
と、カーボン短繊維３の発熱によりガラスビーズ及び素
繊維１が局部的に溶融して溶着され、凸部２が形成され
た。In the step of applying the coupling agent and the binder to the glass fiber 1 in the same manner as in Example 1, the kneaded mixture of the coupling agent and the binder contains an average particle size of 10 μm.
Glass beads and short carbon fibers 3 are mixed in a volume ratio of 1: 1 and a total amount of 30 to 50% by volume,
Was applied. Then, when the microwaves were irradiated for 5 to 10 minutes, the heat generation of the short carbon fibers 3 locally melted and fused the glass beads and the elementary fibers 1 to form the convex portions 2.
【００１２】なお本実施例ではカーボン短繊維を発熱媒
体として用いたが、カーボン粉末や金属粉末を用いても
同様に発熱媒体として利用することができる。また、素
繊維１自体をカーボン繊維から構成すれば、発熱媒体は
不要である。In this embodiment, short carbon fibers are used as the heat generating medium. However, carbon powder or metal powder can also be used as the heat generating medium. Further, if the elementary fibers 1 themselves are made of carbon fibers, a heating medium is unnecessary.
【００１３】ケイ酸アルカリ塩水溶液（水ガラス）を素
繊維１に付着させる。この付着方法には、例えばディッ
ピング、噴霧などの方法がある。そして室温にて５〜１
０時間風乾後、１００℃で１〜２時間加熱する。すると
水ガラス被膜が発泡し、凸部が形成される。その後、８
００〜１０００℃で４時間程度加熱することにより、強
固な凸部２を形成する。An aqueous solution of an alkali silicate (water glass) is adhered to the raw fibers 1. Examples of the adhesion method include methods such as dipping and spraying. And 5-1 at room temperature
After air drying for 0 hour, heat at 100 ° C. for 1 to 2 hours. Then, the water glass coating foams, and a projection is formed. Then 8
By heating at 00 to 1000 ° C. for about 4 hours, a strong convex portion 2 is formed.
【００１４】なお、水ガラス中にカーボンブラック（平
均粒径４００Å程度）を混合しておけば、マイクロ波照
射による加熱が可能となる。 （実施例４）また、水ガラスの塗布時に素繊維１の繊維
束を用いると、各素繊維１間に含浸された水ガラスも発
泡し、図４に示すように凸部２とともに各素繊維１を架
橋する橋部４も形成される。このように橋部４をもつこ
とで、素繊維１どうしの結合力が一層向上し、複合材料
の強度が一層向上する。If carbon black (average particle size of about 400 °) is mixed in water glass, heating by microwave irradiation becomes possible. (Example 4) Further, when the fiber bundle of the elementary fibers 1 is used at the time of applying the waterglass, the waterglass impregnated between the elementary fibers 1 also foams, and as shown in FIG. A bridge 4 bridging 1 is also formed. By having the bridge portion 4 in this manner, the bonding force between the elementary fibers 1 is further improved, and the strength of the composite material is further improved.
【００１５】因みに、Ｔガラス繊維（２２００ｔｅｘ）
を素繊維１として用い、図４に示すように凸部２と橋部
４を形成した強化繊維にエポキシ樹脂を含浸させ、１２
０℃で２時間加熱して得られたＦＲＰビーム（繊維量５
５体積％）では、引張強度が４．１ＧＰａであった。こ
れは、無処方のＴガラス繊維を同量用いた従来のＦＲＰ
ビームの引張強度である３．３ＧＰａに比べて約２割以
上向上していた。By the way, T glass fiber (2200 tex)
Is used as elementary fiber 1, and as shown in FIG. 4, the reinforcing fiber in which convex portions 2 and bridge portions 4 are formed is impregnated with epoxy resin, and
FRP beam obtained by heating at 0 ° C. for 2 hours (fiber amount 5
5% by volume), the tensile strength was 4.1 GPa. This is a conventional FRP using the same amount of unprescribed T glass fiber.
It was improved by about 20% or more compared to 3.3 GPa which is the tensile strength of the beam.
【００１６】上記実施例では、ガラス素繊維１を用いた
が、他にセラミックス繊維、カーボン繊維なども用いる
ことができる。In the above embodiment, the glass fiber 1 is used, but ceramic fiber, carbon fiber or the like may be used.
【００１７】[0017]
【発明の効果】すなわち本発明の樹脂基複合材料用強化
繊維の製造方法によれば、マイクロ波を利用して間接的
に加熱することで凸部を形成しているため、発熱媒体の
分布に応じた凸部を形成することができ、凸部の分布密
度を容易に制御することができる。したがって素繊維表
面に凸部をもつ強化繊維を容易に製造することができ
る。またガラスビーズの溶着あるいは水ガラスの発泡に
より凸部を形成するため、素繊維表面と凸部表面とは滑
らかに連続する。したがって得られた強化繊維では、断
面変化が極端に大きくなるような不具合が回避され、応
力集中部の生成が回避される。そして凸部により複合材
料中でのマトリックス繊維との接合強度が向上し、強化
繊維の配向方向以外の方向に荷重が作用した場合におけ
る複合材料の強度も向上する。According to the method for producing a reinforcing fiber for a resin-based composite material of the present invention, indirect use of microwaves is achieved.
To form a projection by heating the heating medium.
Convex portions corresponding to the distribution can be formed,
The degree can be easily controlled. Therefore the elementary fiber table
Can easily produce reinforcing fibers with convex parts on the surface
You. Also for welding glass beads or foaming water glass
In order to form more convex parts, the surface of the fiber and the convex part
Clearly continuous. Therefore, in the obtained reinforcing fiber,
The problem that the surface change becomes extremely large is avoided,
Generation of a force concentrator is avoided. The protrusions improve the bonding strength between the matrix material and the matrix fiber in the composite material, and also improve the strength of the composite material when a load acts in a direction other than the orientation direction of the reinforcing fiber.
【図１】本発明の一実施例の強化繊維の模式的斜視図で
ある。FIG. 1 is a schematic perspective view of a reinforcing fiber according to one embodiment of the present invention.
【図２】本発明の第２の実施例の強化繊維の模式的斜視
図である。FIG. 2 is a schematic perspective view of a reinforcing fiber according to a second embodiment of the present invention.
【図３】本発明の第３の実施例の強化繊維の模式的斜視
図である。FIG. 3 is a schematic perspective view of a reinforcing fiber according to a third embodiment of the present invention.
【図４】本発明の第４の実施例の強化繊維の模式的斜視
図である。FIG. 4 is a schematic perspective view of a reinforcing fiber according to a fourth embodiment of the present invention.
１：素繊維 ２：凸部 ３：カーボン短繊維
４：橋部1: elementary fiber 2: convex part 3: short carbon fiber
4: Hashibe
Claims (3)
末から選ばれる少なくとも一種よりなる発熱媒体とガラ
スビーズを素繊維に付着させ、次いでマイクロ波を照射
して該発熱媒体を発熱させることで該ガラスビーズを該
素繊維の表面に溶着することを特徴とする樹脂基複合材
料用強化繊維の製造方法。 1. Carbon fiber, carbon powder and metal powder
Heating medium and glass consisting of at least one selected from powder
Attach beads to fiber, then irradiate with microwave
The glass beads are heated by the heat generating medium to generate heat.
Resin-based composite material that is welded to the surface of elementary fibers
Production method of reinforcing fiber for feed.
せ、次いでマイクロ波を照射して該カーボン素繊維を発And then irradiate microwaves to emit the carbon fiber.
熱させることで該ガラスビーズを該カーボン素繊維の表By heating the glass beads, the surface of the carbon fiber
面に溶着することを特徴とする樹脂基複合材料用強化繊Reinforcing fiber for resin-based composite material, which is welded to the surface
維の製造方法。Manufacturing method of fiber.
末から選ばれる少なくとも一種よりなる発熱媒体と水ガHeating medium and water
ラスを混合して素繊維に付着させ、次いでマイクロ波をThe lath is mixed and adhered to the fiber, then microwave
照射して該発熱媒体を発熱させることで該水ガラスを発The water glass is emitted by irradiating the heating medium to generate heat.
泡させて該素繊維の表面に凹凸を形成することを特徴とFoaming and forming irregularities on the surface of the elementary fiber,
する樹脂基複合材料用強化繊維の製造方法。Of producing a reinforcing fiber for a resin-based composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP334393A JP2962081B2 (en) | 1993-01-12 | 1993-01-12 | Method for producing reinforcing fiber for resin-based composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP334393A JP2962081B2 (en) | 1993-01-12 | 1993-01-12 | Method for producing reinforcing fiber for resin-based composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06207375A JPH06207375A (en) | 1994-07-26 |
| JP2962081B2 true JP2962081B2 (en) | 1999-10-12 |
Family
ID=11554717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP334393A Expired - Fee Related JP2962081B2 (en) | 1993-01-12 | 1993-01-12 | Method for producing reinforcing fiber for resin-based composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2962081B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6250664B2 (en) * | 2012-07-23 | 2017-12-20 | カダント インコーポレイテッド | Doctor blade with combined carbon / glass yarn |
-
1993
- 1993-01-12 JP JP334393A patent/JP2962081B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06207375A (en) | 1994-07-26 |
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