JPH07173300A - Fiber-reinforced thermoplastic resin molding - Google Patents
Fiber-reinforced thermoplastic resin moldingInfo
- Publication number
- JPH07173300A JPH07173300A JP5322028A JP32202893A JPH07173300A JP H07173300 A JPH07173300 A JP H07173300A JP 5322028 A JP5322028 A JP 5322028A JP 32202893 A JP32202893 A JP 32202893A JP H07173300 A JPH07173300 A JP H07173300A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- fiber
- matrix
- reinforcing
- reinforcing fibers
- 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
Landscapes
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、強化複合材料の成形品
において、特に力学的に優れた繊維強化熱可塑性樹脂成
形品に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced thermoplastic resin molded product which is mechanically excellent in a molded product of a reinforced composite material.
【０００２】[0002]
【従来の技術】繊維強化複合材料（以下、ＦＲＰと称
す）とはガラス繊維、炭素繊維などの無機繊維、アラミ
ド繊維、ポリエチレン繊維などの有機繊維、更に、ボロ
ン繊維に代表される金属繊維などの強化繊維と、マトリ
ックスとしてエポキシ、不飽和ポリエステルなどの熱硬
化性樹脂やポリエチレン、ポリプロピレン、ポリアミ
ド、ポリエ−テルエ−テルケトンなどの熱可塑性樹脂か
ら成るものである。このＦＲＰは強化繊維の配置によっ
て、強度、剛性などの力学的物性を自由に発現させるこ
とが可能である、即ち、設計の自由度が極めて高いこ
と、更に、軽量かつ高強度、高弾性に優れていることか
ら、航空宇宙産業から建築、スポ−ツ用品など幅広い分
野において利用されている。2. Description of the Related Art Fiber-reinforced composite materials (hereinafter referred to as FRP) include inorganic fibers such as glass fibers and carbon fibers, organic fibers such as aramid fibers and polyethylene fibers, and metal fibers such as boron fibers. It comprises a reinforcing fiber and a thermosetting resin such as epoxy or unsaturated polyester as a matrix, or a thermoplastic resin such as polyethylene, polypropylene, polyamide, or polyether ether ketone. By arranging the reinforcing fibers, this FRP can freely express mechanical properties such as strength and rigidity, that is, it has extremely high degree of freedom in design, and is also lightweight and has high strength and high elasticity. Therefore, it is used in a wide range of fields from the aerospace industry to construction and sports equipment.
【０００３】上記のＦＲＰの中で、マトリックス樹脂が
熱可塑性樹脂からなるもの（以下、ＦＲＴＰと称す）の
開発が、近年、盛んに行われている。その理由として、
このＦＲＴＰは、これまで主に開発されてきたマトリッ
クス樹脂が熱硬化性のものと比較し、材料の保存が容易
なこと、成形の時の作業環境が良好なことなどが挙げら
れる。Among the above-mentioned FRPs, those in which the matrix resin is made of a thermoplastic resin (hereinafter referred to as FRTP) have been actively developed in recent years. The reason is
This FRTP has the advantages that the matrix resin that has been mainly developed so far is easier to store the material and that the working environment at the time of molding is better than the thermosetting ones.
【０００４】このＦＲＴＰの成形品を構成する強化繊維
の形態は、大凡、次の二種類に分けることができる。ま
ず、長さが約２５ｍｍ以下の強化繊維がＦＲＴＰの中に
存在する形態をとる短繊維強化がある。一方、連続した
強化繊維がＦＲＴＰの中に存在する形態をとる連続繊維
強化もある。短繊維強化の場合、一般に成形品は射出成
形品などにみられる強化形態であり、寸法安定性などに
優れた成形品を得ることができる。しかし、強化繊維が
短いこと、強化繊維の方向の制御が困難なことなどの理
由から、設計の自由度、強度、剛性などの力学的物性に
限界がある。連続繊維強化の場合、一般に成形品は、プ
レス成形品、スタンピング成形品などにみられる強化形
態である。これは、短繊維強化と比較して、強化繊維が
長いことから、設計の自由度、強度、剛性などの力学的
特性に優れた成形品を得ることが可能である。The form of the reinforcing fiber forming the FRTP molded product can be roughly classified into the following two types. First, there is short fiber reinforcement in which reinforcing fibers having a length of about 25 mm or less are present in FRTP. On the other hand, there is continuous fiber reinforcement in which continuous reinforcing fibers are present in FRTP. In the case of short fiber reinforced, a molded product is generally a reinforced form found in injection molded products and the like, and a molded product excellent in dimensional stability and the like can be obtained. However, because of the short length of the reinforcing fibers and the difficulty in controlling the direction of the reinforcing fibers, there are limits to mechanical properties such as design flexibility, strength, and rigidity. In the case of continuous fiber reinforcement, the molded product is generally the reinforced form found in press molded products, stamping molded products and the like. This is because it is possible to obtain a molded product excellent in mechanical characteristics such as freedom of design, strength and rigidity, because the reinforcing fiber is longer than that of short fiber reinforcement.
【０００５】このような連続繊維強化の形態をしたＦＲ
ＴＰの成形用材料は種々の状態で存在し、これを成形方
法によって分類すると大きく、二つに分けることがき
る。まず、強化繊維に、予めマトリクスである熱可塑性
樹脂を繊維状や布帛状にして混繊、積層させたり、粉末
状にして担持させたり、または、樹脂状にして含浸さ
せ、糸状やテ−プ状やシ−ト状にした成形材料（以下、
プリプレグと称する）として提供されるものと強化繊維
そのものを布帛等の状態で供給して、成形の時に熱可塑
性樹脂を強化繊維に含浸させるような成形材料（以下、
ノンプリプレグと称す）がある。FR in the form of such continuous fiber reinforcement
There are various molding materials for TP, which are roughly classified according to the molding method and can be divided into two. First, the reinforcing fiber is preliminarily mixed with a thermoplastic resin which is a matrix in the form of fiber or cloth, and mixed, laminated, powdered or supported, or impregnated into resin to impregnate it into a thread or tape. Molding material in the shape of a sheet or sheet (hereinafter,
A molding material (hereinafter referred to as prepreg), which is supplied with the reinforcing fibers themselves in the form of a fabric and the like, and which impregnates the reinforcing fibers with a thermoplastic resin at the time of molding (hereinafter, referred to as prepreg).
There is a non-prepreg).
【０００６】[0006]
【発明が解決しようとする課題】ＦＲＴＰで、形態が連
続繊維強化の成形品は、次のような問題点を有してい
る。例えば、強化繊維を織物にしたものを積層した成形
品の場合、層と層の間はマトリックスのみなので、強度
（以下、層間強度と称す）が小さくなると言う問題点が
ある。また、振動には、強化繊維が連続しているので、
そのまま伝播し、振動吸収性が充分に得られないと言う
問題点もある。The FRTP-shaped, continuous fiber-reinforced molded article has the following problems. For example, in the case of a molded article in which woven fabrics of reinforcing fibers are laminated, there is a problem that the strength (hereinafter referred to as the interlaminar strength) becomes small because there is only a matrix between the layers. In addition, since the reinforcing fibers are continuous in the vibration,
There is also a problem in that it propagates as it is, and sufficient vibration absorption cannot be obtained.
【０００７】[0007]
【課題を解決するための手段】本発明は、強化複合材料
の成形品において、優れた力学的物性を得ることが可能
な成形品に関するものである。本発明の成形品は、強化
繊維と熱可塑性マトリックス樹脂とから成り、その強化
繊維を実質的に無撚の非連続繊維にすることを特徴とす
る。また、その強化繊維の少なくとも一部は布帛状であ
ることが望ましく、希望する力学的物性などを充分に発
現し得る形態にすることが肝要である。なお、ここに記
す布帛とは織物をはじめ、多軸積層布、編物、組物、不
織布などを示すが、特に、ここに記したものに限定され
る物ではない。SUMMARY OF THE INVENTION The present invention relates to a molded article of a reinforced composite material, which is capable of obtaining excellent mechanical properties. The molded article of the present invention is characterized by comprising reinforcing fibers and a thermoplastic matrix resin, and making the reinforcing fibers substantially non-twisted discontinuous fibers. Further, it is desirable that at least a part of the reinforcing fibers be in the form of a cloth, and it is important to make it into a form capable of sufficiently expressing desired mechanical properties and the like. Note that the cloth described here includes a woven fabric, a multiaxial laminated cloth, a knit, a braid, a non-woven fabric, and the like, but is not particularly limited to the one described here.
【０００８】強化繊維としては、ガラス繊維、炭素繊維
などの無機繊維、アラミド繊維、ポリエチレン繊維など
の有機繊維、更に、ボロン繊維などの金属繊維などがあ
るが、特に、これに限定されるものではない。マトリッ
クス樹脂としては、ポリアミド系樹脂、ポリエステル系
樹脂、ポリオレフィン系樹脂などの熱可塑性樹脂が考え
られるが、特にこれに限定されるものではない。The reinforcing fibers include inorganic fibers such as glass fibers and carbon fibers, organic fibers such as aramid fibers and polyethylene fibers, and metal fibers such as boron fibers. However, the reinforcing fibers are not particularly limited to these. Absent. The matrix resin may be a thermoplastic resin such as a polyamide resin, a polyester resin, or a polyolefin resin, but is not particularly limited thereto.
【０００９】成形品の熱可塑性マトリックスは、ナイロ
ン６やナイロン６６に代表されるポリアミド樹脂、ポリ
エチレンテレフタレ−トやポリブチレンテレフタレ−ト
などのポリエステル樹脂、ポリエチレンやポリプロピレ
ンなどのポリオレフィン系樹脂、ポリエ−テルエ−テル
ケトン樹脂、ポリフェニレンサルファイド樹脂、ポリエ
−テルイミド樹脂、ポリカ−ボネ−ト樹脂などが挙げら
れるが、特にこれに限定されるものではない。The thermoplastic matrix of the molded product is a polyamide resin typified by nylon 6 or nylon 66, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a polyolefin resin such as polyethylene or polypropylene, or a polyethylene resin. -Terether-terketone resin, polyphenylene sulfide resin, polyetherimide resin, polycarbonate resin and the like can be mentioned, but not limited thereto.
【００１０】本発明の成形用材料は、非連続の強化繊維
と非連続の熱可塑性マトリックス繊維が混繊され、その
混繊度が２０％以上であり、かつ、該マトリックス繊維
と実質的に同じマトリックスから成るラッピングヤ−ン
にて被覆されている混繊糸であることが望まれる。ここ
で、混繊度は下記の式により定義される。The molding material of the present invention is a matrix in which discontinuous reinforcing fibers and discontinuous thermoplastic matrix fibers are mixed and the degree of mixing is 20% or more, and the matrix is substantially the same as the matrix fibers. It is desired that the mixed fiber yarn is covered with a wrapping yarn composed of Here, the degree of mixed fiber is defined by the following formula.
【数１】 ここで、Ｎは強化繊維の総本数を示し、ＮｃＸは強化繊
維がいくつかの群に分割されているときのその群の個数
を示す。また、Ｘは群の中の特定な１つの群におけるフ
ィラメント数を示す。従って、上記の式において、１０
０×（Ｎ−Ｘ）／（Ｎ−１）は、混繊状態を意味し、Ｘ
が小さいほど混繊状態が良好である。また、（Ｎｃ×
Ｘ）／（Ｎ／Ｘ）は、重みを示す。[Equation 1] Here, N represents the total number of reinforcing fibers, and NcX represents the number of the reinforcing fibers divided into several groups. In addition, X represents the number of filaments in a specific one of the groups. Therefore, in the above equation, 10
0x (N-X) / (N-1) means a mixed fiber state, and X
The smaller is the better the mixed fiber state. In addition, (Nc ×
X) / (N / X) indicates a weight.
【００１１】混繊度は大きいほど、低い圧力、かつ／ま
たは、短い時間で含浸状態が良好な成形品が得られの
で、その値は２０％以上であることが必要である。これ
は、混繊度が２０％未満になると、良好な含浸状態を得
るために、高い圧力、かつ／または、長い時間が必要に
なるので不経済になり、成形品の機械的物性も低下する
からである。加えて、該混繊糸を構成するラッピングヤ
ーンは、１乃至１０重量％であることが好ましい。ま
た、取扱性、賦形性などを鑑み、その構造は少なくとも
一部が布帛状であることが望まれる。The higher the degree of fiber mixing, the lower the pressure and / or the shorter time the molded product with good impregnation can be obtained. Therefore, the value must be 20% or more. This is because when the degree of mixing is less than 20%, high pressure and / or a long time is required to obtain a good impregnation state, which is uneconomical and the mechanical properties of the molded product are deteriorated. Is. In addition, the wrapping yarn constituting the mixed fiber is preferably 1 to 10% by weight. Further, in view of handleability, shapeability, etc., it is desired that the structure is at least partially cloth-like.
【００１２】[0012]
【作用】強化繊維とマトリックス樹脂とから成る複合材
料の成形品において、該強化繊維が実質的に無撚の非連
続繊維なので、強化繊維の束を構成する一部の強化繊維
が束からはみ出して、強化繊維の束と束の間にかかるの
で、そこでの強度が向上し、層間強度が大きくなる。In the molded article of the composite material composed of the reinforcing fiber and the matrix resin, since the reinforcing fiber is a substantially non-twisted discontinuous fiber, a part of the reinforcing fibers forming the bundle of reinforcing fibers protrudes from the bundle. Since it is applied between the bundles of reinforcing fibers, the strength there is improved and the interlayer strength is increased.
【００１３】また、振動に対して、成形品中での強化繊
維が不連続なので、振動の伝播を吸収され、振動吸収性
も向上する。加えて、後加工で折り曲げる時、強化繊維
に張力が掛かっても連続の強化繊維の様に折り曲げの谷
側に強化繊維が大きく片寄らない。Further, since the reinforcing fibers in the molded product are discontinuous with respect to the vibration, the propagation of the vibration is absorbed and the vibration absorbability is also improved. In addition, even when tension is applied to the reinforcing fiber when it is bent in the post-processing, the reinforcing fiber does not largely deviate to the valley side of the bending unlike continuous reinforcing fiber.
【００１４】[0014]
実施例１ 非連続の炭素繊維と非連続のナイロン６繊維から成り、
混繊度が５０％である混繊糸の平織織物の成形用材料を
積層し、設定の厚さが２ｍｍの平板の成形品を得た。な
お、炭素繊維の体積含有率は、６０％であった。Example 1 comprising discontinuous carbon fibers and discontinuous nylon 6 fibers,
A molding material for a plain woven fabric of mixed fiber yarn having a mixed fiber degree of 50% was laminated to obtain a flat plate molded product having a set thickness of 2 mm. The volume content of carbon fiber was 60%.
【００１５】成形は温度２５５℃に加熱した金型に、該
混繊糸の平織織物を所定量だけ積層し、金型を閉じ、プ
レス成形機で、圧力５ｋｇｆ／ｃｍ2 、保持時間２０分
間だけ押圧し、そのままの状態で冷却した。その成形品
をナイロン６の融点より１０℃から２０℃だけ低い状態
にした折り曲げ加工用治具に沿わせ、９０°折り曲げ加
工を施した。The molding is carried out by laminating a predetermined amount of the plain-woven fabric of the mixed fiber on a mold heated to a temperature of 255 ° C., closing the mold, and using a press molding machine, the pressure is 5 kgf / cm 2 , and the holding time is only 20 minutes. It was pressed and cooled in that state. The molded product was placed along a bending jig having a temperature lower than the melting point of nylon 6 by 10 to 20 ° C. and subjected to 90 ° bending.
【００１６】[0016]
【比較例１】炭素繊維とナイロン６繊維が連続であるこ
とを除いて、実施例１と同様に設定の厚さが２ｍｍの平
板の成形品を得た。また、成形と折り曲げ加工を実施例
１と同様に行なった。実施例１およびに比較例１の平板
の成形品の含浸状態、強度、振動吸収性ならびに、折り
曲げ加工性を評価し、その比較の結果をまとめて表１に
示した。Comparative Example 1 A flat plate molded product having a set thickness of 2 mm was obtained in the same manner as in Example 1 except that carbon fibers and nylon 6 fibers were continuous. Further, molding and bending were performed in the same manner as in Example 1. The impregnated state, strength, vibration absorbing property, and bending workability of the flat plate molded products of Example 1 and Comparative Example 1 were evaluated, and the results of the comparison are summarized in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】表１の結果から明らかなように、本発明
によりマトリックス樹脂との含浸性、機械強度、振動吸
収性および折り曲げ加工などに優れた繊維強化熱可塑性
樹脂成形品を得ることができる。As is clear from the results of Table 1, according to the present invention, it is possible to obtain a fiber-reinforced thermoplastic resin molded article which is excellent in impregnation with a matrix resin, mechanical strength, vibration absorption and bending. .
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Claims (3)
から成る複合材料の成形品であって、該強化繊維が実質
的に無撚の非連続繊維であることを特徴とする繊維強化
熱可塑性樹脂成形品。1. A fiber-reinforced thermoplastic resin molding, which is a molded article of a composite material comprising reinforcing fibers and a thermoplastic matrix resin, wherein the reinforcing fibers are substantially untwisted discontinuous fibers. Goods.
あることを特徴とする請求項１記載の繊維強化熱可塑性
樹脂成形品。2. The fiber-reinforced thermoplastic resin molded article according to claim 1, wherein at least a part of the reinforcing fibers is cloth-like.
トリックス繊維が混繊され、その混繊度が２０％以上で
あり、かつ、該マトリックス繊維と実質的に同じマトリ
ックスから成るラッピングヤ−ンにて被覆されている混
繊糸から成り、少なくともその一部が布帛状である複合
材料から成形されたことを特徴とする請求項１又は２に
記載の繊維強化熱可塑性樹脂成形品。3. A wrapping yarn in which discontinuous reinforcing fibers and discontinuous thermoplastic matrix fibers are mixed and the degree of mixing is 20% or more, and the matrix is substantially the same as the matrix fibers. The fiber-reinforced thermoplastic resin molded article according to claim 1 or 2, wherein the fiber-reinforced thermoplastic resin molded article is formed of a composite material that is made of a mixed fiber that is covered with 1. and at least a part of which is a cloth-like composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5322028A JPH07173300A (en) | 1993-12-21 | 1993-12-21 | Fiber-reinforced thermoplastic resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5322028A JPH07173300A (en) | 1993-12-21 | 1993-12-21 | Fiber-reinforced thermoplastic resin molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07173300A true JPH07173300A (en) | 1995-07-11 |
Family
ID=18139124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5322028A Pending JPH07173300A (en) | 1993-12-21 | 1993-12-21 | Fiber-reinforced thermoplastic resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07173300A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007055017A1 (en) * | 2005-11-11 | 2007-05-18 | Takayasu Co., Ltd. | Composite and process for producing the same |
| WO2015020020A1 (en) | 2013-08-06 | 2015-02-12 | 三菱瓦斯化学株式会社 | Polyimide resin composition, and (polyimide resin)-fiber composite material |
| CN105221294A (en) * | 2014-05-15 | 2016-01-06 | 波音公司 | For the thermoforming leaf grating of jet engine THR REV |
| KR20170002690A (en) | 2015-03-19 | 2017-01-06 | 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 | Polyimide resin |
| KR20170027859A (en) | 2015-03-19 | 2017-03-10 | 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 | Polyimide resin |
-
1993
- 1993-12-21 JP JP5322028A patent/JPH07173300A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007055017A1 (en) * | 2005-11-11 | 2007-05-18 | Takayasu Co., Ltd. | Composite and process for producing the same |
| WO2015020020A1 (en) | 2013-08-06 | 2015-02-12 | 三菱瓦斯化学株式会社 | Polyimide resin composition, and (polyimide resin)-fiber composite material |
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