JPH04240280A - Chop for reinforcement of composite material - Google Patents
Chop for reinforcement of composite materialInfo
- Publication number
- JPH04240280A JPH04240280A JP788391A JP788391A JPH04240280A JP H04240280 A JPH04240280 A JP H04240280A JP 788391 A JP788391 A JP 788391A JP 788391 A JP788391 A JP 788391A JP H04240280 A JPH04240280 A JP H04240280A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- composite material
- chop
- fibers
- reinforcing
- 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.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 230000002787 reinforcement Effects 0.000 title description 6
- 239000000835 fiber Substances 0.000 claims abstract description 74
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 20
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 8
- 239000003733 fiber-reinforced composite Substances 0.000 abstract description 8
- 239000012783 reinforcing fiber Substances 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 238000009730 filament winding Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Ropes Or Cables (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、繊維強化複合材料に強
化材として混入して用いられる複合材料強化用チョップ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to chops for reinforcing composite materials, which are mixed into fiber-reinforced composite materials as a reinforcing material.
【０００２】0002
【従来の技術】一般に繊維強化複合材料に用いる繊維強
化材では、以下に示す強化形態又は強化材形状が用いら
れる。連続繊維を用いる場合は、１方向に繊維を引きそ
ろえた一方向強化形態、２方向ないし３方向もしくは２
．５方向、４方向、５方向等と呼ばれる各種織物、編み
物状強化形態又は連続繊維を型に巻きつけて得られるフ
ィラメントワインディングが知られている。不連続繊維
を用いる場合は、連続繊維を用いた強化形態を必要な大
きさに切断して得られるチョップ状強化形態を用いる場
合と、単繊維を繊維強化複合材料の寸法未満の任意長さ
に切断し、必要に応じた繊維配向を持って分散させる場
合がある。例えば、『ＣＭＣ発行：最新コンポジット材
料−製造・応用・評価』の３６頁に記載されている。
また、連続繊維を使用して各種強化形態を形成する際に
、一重撚糸状の連続繊維を用いることが知られている。
（特開平２−８０４８７号公報）前記一重撚糸状の連続
繊維を用いてＣ／Ｃ複合材料（炭素繊維強化炭素複合材
料）を製造する場合、撚糸形状を保形する補助手段とし
て織布（特公平２−５５３９３号公報）、不織布を用い
たり、巻き付け成形（フィラメントワイディング成形）
法を用いている。しかしこの場合は、繊維の配向が制限
され、等方的な（ランダム的な）織布配向を実現するこ
とができない。このため、積層層間が存在し、強度的、
機能的（耐摩耗性等）に問題が残される。BACKGROUND OF THE INVENTION In general, fiber reinforced materials used in fiber reinforced composite materials have the following reinforcing forms or reinforcing material shapes. When using continuous fibers, it can be reinforced in one direction, with fibers aligned in one direction, reinforced in two or three directions, or reinforced in two or three directions.
．． BACKGROUND OF THE INVENTION Various types of woven fabrics, knitted reinforced forms called 5-way, 4-way, 5-way, etc., or filament windings obtained by winding continuous fibers around a mold are known. When using discontinuous fibers, there are cases where a chopped reinforcement form obtained by cutting a reinforcement form using continuous fibers into the required size is used, and a case where a chopped reinforcement form obtained by cutting a reinforcement form using continuous fibers into the required size, and a case where a single fiber is used in an arbitrary length that is less than the size of the fiber reinforced composite material. It may be cut and dispersed with fiber orientation as required. For example, it is described on page 36 of "CMC Publishing: Latest Composite Materials - Manufacture, Application and Evaluation". Furthermore, when forming various reinforcement forms using continuous fibers, it is known to use single-twist continuous fibers. (Japanese Unexamined Patent Publication No. 2-80487) When producing a C/C composite material (carbon fiber reinforced carbon composite material) using the single-twisted continuous fibers, a woven fabric (specially Publication No. 2-55393), using nonwoven fabric or wrapping molding (filament winding molding)
law is used. However, in this case, fiber orientation is restricted and isotropic (random) textile orientation cannot be achieved. Therefore, there are gaps between the laminated layers, which increases the strength and
Functional issues (wear resistance, etc.) remain.
【０００３】連続繊維を用いた繊維強化複合材料では、
等方性の高い繊維配向を得ることが困難であるという問
題があった。また、不連続繊維を用いた繊維強化複合材
料では、チョップそのものが等方性に乏しいため、チョ
ップの大きさを小さくしてチョップの等方性を確保する
か、強化材の混入比率を少なくしてチョップの方向自由
度を確保することによって等方性の繊維配向を実現させ
ることとしている。従って、繊維の補強効果が犠牲にな
るという問題があった。[0003] In fiber reinforced composite materials using continuous fibers,
There was a problem in that it was difficult to obtain highly isotropic fiber orientation. In addition, in fiber-reinforced composite materials using discontinuous fibers, the chop itself lacks isotropy, so it is necessary to reduce the size of the chop to ensure chop isotropy, or to reduce the ratio of reinforcing material mixed in. By ensuring the degree of freedom in the chop direction, isotropic fiber orientation is achieved. Therefore, there was a problem that the reinforcing effect of the fibers was sacrificed.
【０００４】また、チョップ状の形態はバインダを用い
て保形しなくてはならない強化形態が多いという問題点
があった。[0004] Furthermore, there is a problem in that many of the chopped shapes have to be reinforced using a binder to maintain their shape.
【０００５】[0005]
【発明が解決しようとする課題】本発明は前記問題点を
解決するものであって、バインダを使用せずに等方的（
ランダム的）繊維配向を容易に実現し、かつ高い補強効
果を実現する繊維強化複合材料用チョップを提供するこ
とを目的としている。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems.
The purpose of the present invention is to provide a chop for fiber-reinforced composite materials that easily realizes (random) fiber orientation and achieves a high reinforcing effect.
【０００６】[0006]
【課題を解決するための手段】本発明は、撚りを付与し
た単位繊維束の複数本の集合束であって、該集合束は前
記単位繊維束にさらに撚りを付与した二重撚り繊維束で
あることを特徴とする複合材料強化用チョップである。
この二重撚り繊維束を団塊状に集合して集合体とすれば
、さらにすぐれた複合材料強化用チョップとなる。また
この二重撚り繊維束から成る放射枝状体としてもよい。
これらの複合材料強化用チョップは、複合材料に用いた
場合複合材料中において等方的繊維配向を容易に実現し
、無バインダでチョップ形状の保形性を有し、高い補強
効果を実現する。本発明に用いる繊維としては、天然繊
維、合成繊維、ガラス繊維、炭素繊維、セラミックス繊
維、及び金属繊維から選ばれた、１種の繊維または複数
種の組合わせ繊維を用いることができる。[Means for Solving the Problems] The present invention provides a plurality of assembled bundles of twisted unit fiber bundles, the assembled bundle being a double-twisted fiber bundle in which the unit fiber bundles are further twisted. This is a chop for reinforcing composite materials, which is characterized by: If these double-twisted fiber bundles are gathered into a nodule shape to form an aggregate, an even better chop for reinforcing composite materials will be obtained. Alternatively, a radial branch body made of this double-twisted fiber bundle may be used. When these chops for reinforcing composite materials are used in composite materials, they easily realize isotropic fiber orientation in the composite materials, have shape retention of the chop shape without binder, and realize high reinforcing effects. As the fibers used in the present invention, one type of fiber or a combination of multiple types of fibers selected from natural fibers, synthetic fibers, glass fibers, carbon fibers, ceramic fibers, and metal fibers can be used.
【０００７】本発明の複合材料強化用チョップは炭素繊
維強化炭素複合材料（Ｃ／Ｃ複合材料）、繊維強化プラ
スチック（ＦＲＰ）、繊維強化金属複合材料（ＦＲＭ）
、繊維強化セラミック複合材料、繊維強化コンクリート
等に好適に用いられる。[0007] The chop for reinforcing composite materials of the present invention is carbon fiber reinforced carbon composite material (C/C composite material), fiber reinforced plastic (FRP), fiber reinforced metal composite material (FRM).
, fiber-reinforced ceramic composite materials, fiber-reinforced concrete, etc.
【０００８】[0008]
【作用】本発明の複合材料強化用チョップは、撚りのか
かった単位繊維束を複数本束ねて更に撚った二重撚り繊
維束によって２重らせん状に繊維を配向させるので、複
合材料に用いた場合、複合材料中において等方性が高い
。さらにこの二重撚り繊維束を団塊状に集合させた集合
体形状あるいは枝形状が不規則に放射状に配向された形
状とすることによって、複合材料に用いた場合、複合材
料中において等方性の高い繊維配向を実現することがで
きる。[Function] The chop for reinforcing composite materials of the present invention can be used for composite materials because it orients the fibers in a double helix by bundling a plurality of twisted unit fiber bundles and twisting them into a double-twisted fiber bundle. If it is, the isotropy in the composite material is high. Furthermore, by forming this double-twisted fiber bundle into a shape where the fibers are aggregated into a nodule shape or a shape where the branch shapes are irregularly oriented radially, when used in a composite material, it is possible to create an isotropic property in the composite material. High fiber orientation can be achieved.
【０００９】本発明によれば、前記に示した等方性の高
い繊維配向を持つチョップ形状を、バインダを用いずに
保形することができる。更に本発明のチョップを複合材
料に用いた場合、等方的な機械的結合により、積層層間
が生ずることなく、層間強度の問題がまったくない。According to the present invention, the above-mentioned chopped shape having highly isotropic fiber orientation can be maintained without using a binder. Furthermore, when the chop of the present invention is used in a composite material, due to isotropic mechanical bonding, no interlayer gaps occur, and there is no problem with interlayer strength.
【００１０】0010
【実施例】〔実施例１〕図１は本発明の１実施例を示す
模式図である。撚りを付与した単位繊維束３を折返し２
本に束ねて、更に撚った二重撚り繊維束４とすることに
より、集合束１を形成している。これにより等方性の高
い繊維配向をバインダの有無にかかわらず達成すること
ができた。[Embodiment] [Embodiment 1] FIG. 1 is a schematic diagram showing one embodiment of the present invention. Fold back the twisted unit fiber bundle 3
A collective bundle 1 is formed by bundling it into a book and further twisting it into a double-twisted fiber bundle 4. As a result, highly isotropic fiber orientation could be achieved regardless of the presence or absence of a binder.
【００１１】〔実施例２〕図２は本発明の１実施例を示
す模式図である。撚りのかかった繊維束３を団塊状とな
るように不特定本数束ね、更に不規則な撚りこぶを生じ
せしめた塊状集合体１０である。この塊状集合体は等方
性の高い繊維配向を有しており、バインダの有無にかか
わらずすぐれた複合材料用チョップとして用いることが
できる。[Embodiment 2] FIG. 2 is a schematic diagram showing one embodiment of the present invention. This is a lump-like aggregate 10 in which an unspecified number of twisted fiber bundles 3 are bundled into a nodule-like shape, and irregularly twisted knots are formed. This lumpy aggregate has a highly isotropic fiber orientation and can be used as an excellent composite material chop regardless of the presence or absence of a binder.
【００１２】〔実施例３〕図３は本発明の１実施例を示
す放射枝状形状体２０の模式図である。撚りを付与した
単位繊維束３を２本束ねて二重撚り繊維束４を形成し、
さらに不特定形状の放射形状のチョップとしたことによ
り、バインダの有無にかかわらず等方性の高い繊維配向
を達成することができ、かつ、放射形状の枝状繊維束が
互いに機械的にからみ合い高い補強効果を達成すること
ができる。[Embodiment 3] FIG. 3 is a schematic diagram of a radial branch-shaped body 20 showing one embodiment of the present invention. Two twisted unit fiber bundles 3 are bundled to form a double twisted fiber bundle 4,
Furthermore, by making the chop into a radial shape with an unspecified shape, highly isotropic fiber orientation can be achieved regardless of the presence or absence of a binder, and the radial branch fiber bundles are mechanically entangled with each other. A high reinforcing effect can be achieved.
【００１３】[0013]
【発明の効果】本発明は、撚りを付与した繊維束を複数
本束ねて更に撚りを付与した二重撚り繊維束としたこと
により、開繊を全く生ずることなく、等方性の高い強化
繊維配向ができるようになった。また、二重撚り繊維束
が互いにからみ合い、高い補強効果を得ることができる
ようになった。更に等方的な機械的結合により、積層層
間が生ずることなく、層間強度の問題がまったくない。Effects of the Invention: The present invention has a structure in which a plurality of twisted fiber bundles are bundled to form a double-twisted fiber bundle that is further twisted, so that highly isotropic reinforcing fibers can be produced without causing any opening. Orientation is now possible. In addition, the double-twisted fiber bundles are entangled with each other, making it possible to obtain a high reinforcing effect. Furthermore, due to the isotropic mechanical bonding, there is no problem of interlaminar strength since there is no gap between laminated layers.
【００１４】本発明によって得られる二重撚り繊維束チ
ョップは、繊維のからみを利用して形状を維持するので
、バインダを使用せずにチョップ形状を保形することが
でき、ハンドリングが容易であるという効果もある。
本発明の複合材料強化用チョップは、摩擦材、例えばデ
ィスクブレーキのブレーキパッドや、Ｃ／Ｃブレーキ（
炭素繊維強化炭素複合材料ブレーキ）等の摺動部材に好
適に用いることができる。[0014] Since the double-twisted fiber bundle chop obtained by the present invention maintains its shape by utilizing the entanglement of the fibers, the chopped shape can be maintained without using a binder, and it is easy to handle. There is also this effect. The composite material reinforcing chop of the present invention can be used for friction materials, such as brake pads of disc brakes, C/C brakes (
It can be suitably used for sliding members such as carbon fiber reinforced carbon composite material brakes.
【図１】本発明の二重撚り繊維束の複合材料強化用チョ
ップの実施例を示す模式図である。FIG. 1 is a schematic diagram showing an embodiment of a chop for reinforcing a composite material of a double-twisted fiber bundle according to the present invention.
【図２】本発明の二重撚り繊維束を団塊状に集合した複
合材料強化用チョップの実施例を示す模式図である。FIG. 2 is a schematic diagram showing an example of a chop for reinforcing a composite material in which double-twisted fiber bundles of the present invention are assembled into a nodule shape.
【図３】本発明の二重撚り繊維束を放射枝状形状とした
複合材料強化用チョップの実施例を示す模式図である。FIG. 3 is a schematic diagram showing an example of a chop for reinforcing a composite material in which double-twisted fiber bundles of the present invention are shaped like radial branches.
１ 集合束 ２ 繊維 ３ 単位繊維束 ４ 二重撚り繊維束 １０ 団塊状集合体 ２０ 放射枝状形状体 1 Set bundle 2 Fiber 3 Unit fiber bundle 4 Double twisted fiber bundle 10. Baby-boom-like aggregates 20 Radial branch shaped body
Claims (4)
集合束であって、該集合束は前記単位繊維束にさらに撚
りを付与した二重撚り繊維束であることを特徴とする複
合材料強化用チョップ。1. A composite material comprising a plurality of aggregated bundles of twisted unit fiber bundles, wherein the aggregated bundle is a double-twisted fiber bundle in which the unit fiber bundles are further twisted. Strengthening chop.
状に集合してなることを特徴とする複合材料強化用チョ
ップ。2. A chop for reinforcing a composite material, characterized in that the double-twisted fiber bundle according to claim 1 is assembled into a nodule shape.
成される放射枝状二重撚り繊維束であることを特徴とす
る複合材料強化用チョップ。3. A chop for reinforcing a composite material, which is a radially branched double-twisted fiber bundle composed of the double-twisted fiber bundle according to claim 1.
繊維、炭素繊維、セラミックス繊維、及び金属繊維から
選ばれた、１種の繊維または複数種の組合わせ繊維から
なることを特徴とする請求項１〜３のいずれか記載の複
合材料強化用チョップ。4. A claim characterized in that the fibers are made of one type of fiber or a combination of multiple types of fibers selected from natural fibers, synthetic fibers, glass fibers, carbon fibers, ceramic fibers, and metal fibers. Item 3. Chop for reinforcing composite material according to any one of Items 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP788391A JPH04240280A (en) | 1991-01-25 | 1991-01-25 | Chop for reinforcement of composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP788391A JPH04240280A (en) | 1991-01-25 | 1991-01-25 | Chop for reinforcement of composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04240280A true JPH04240280A (en) | 1992-08-27 |
Family
ID=11678006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP788391A Pending JPH04240280A (en) | 1991-01-25 | 1991-01-25 | Chop for reinforcement of composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04240280A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007070204A (en) * | 2005-09-09 | 2007-03-22 | Toray Ind Inc | Carbon fiber-containing composite resin wire rod for reinforcing concrete or mortar, manufacturing method therefor, and concrete or mortar structure |
| CN104928957A (en) * | 2015-06-18 | 2015-09-23 | 蔡钢 | Device for producing coir rope |
-
1991
- 1991-01-25 JP JP788391A patent/JPH04240280A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007070204A (en) * | 2005-09-09 | 2007-03-22 | Toray Ind Inc | Carbon fiber-containing composite resin wire rod for reinforcing concrete or mortar, manufacturing method therefor, and concrete or mortar structure |
| CN104928957A (en) * | 2015-06-18 | 2015-09-23 | 蔡钢 | Device for producing coir rope |
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| JPS6328217Y2 (en) |