JP7005557B2 - 炭素繊維強化プラスチック板および炭素繊維強化プラスチック板の製造方法 - Google Patents
炭素繊維強化プラスチック板および炭素繊維強化プラスチック板の製造方法 Download PDFInfo
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- JP7005557B2 JP7005557B2 JP2019106345A JP2019106345A JP7005557B2 JP 7005557 B2 JP7005557 B2 JP 7005557B2 JP 2019106345 A JP2019106345 A JP 2019106345A JP 2019106345 A JP2019106345 A JP 2019106345A JP 7005557 B2 JP7005557 B2 JP 7005557B2
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- carbon fiber
- reinforced plastic
- fiber reinforced
- woven fabric
- plastic layer
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- B32B2260/023—Two or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/18—Aircraft
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- Nonwoven Fabrics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
本発明の炭素繊維強化プラスチック板は、第1炭素繊維強化プラスチック層と、第2炭素繊維強化プラスチック層と、を備える。CFRPシートやプリプレグ、フィルムのように曲げられるような柔軟性はなく、硬く剛性のある板である。
第1炭素繊維強化プラスチック層は、炭素繊維織布および母材を有する層である。炭素繊維として織布を採用し、母材と組み合わせた複合材料層とすることで強靭な層となるため、CFRP板としての強度を確保することができる。
炭素繊維織布は、炭素繊維を糸とし、糸を縦横に組み合わせて織った織物である。炭素繊維は、軽くて強いという長所があり、例えば鉄と比較すると比重で1/4倍、比強度で10倍、比弾性率が7倍ある。その他にも、耐摩耗性、耐熱性、熱伸縮性、耐酸性、電気伝導性に優れる。例えば、アクリル繊維またはピッチを原料とし、原料を高温で炭化して作ることが可能であり、炭素繊維としては有機繊維の前駆体を加熱炭素化処理して得られる、質量比で90%以上が炭素で構成される繊維が挙げられる。
CFRP板において、母材は炭素繊維の間隙を充填する材料であり、合成樹脂や天然樹脂を用いることができる。CFRP板としての強度を確保する観点から、エポキシ樹脂やウレタン樹脂等の熱硬化性樹脂を母材として用いることができる。また、炭素繊維との相溶性の点から、ポリブチレンサクシネート(PBS)やポリフェニレンサルファイド(PPS)も用いることができる。
第2炭素繊維強化プラスチック層は、炭素繊維不織布および母材を有する厚さ3mm以下の層である。炭素繊維として不織布を採用し、母材と組み合わせた複合材料層とする。炭素繊維不織布は、炭素繊維織布と比べるとCFRP板とした場合の強度に劣るものの、フライス加工等の加工時に毛羽立ちが抑えられて加工性に優れることとなる。
炭素繊維不織布は、炭素繊維を織らずニードルパンチ法等によって3次元に絡み合わせたシート状の布である。炭素繊維の詳細については、〈第1炭素繊維強化プラスチック層〉の項目において説明した内容と同様であるため、ここでは説明は省略する。
本発明の炭素繊維強化プラスチック板は、第1炭素繊維強化プラスチック層と第2炭素繊維強化プラスチック層に加え、他の構成を備えてもよい。例えば、第1炭素繊維強化プラスチック層と第2炭素繊維強化プラスチック層とを接着して積層する場合には、これらの層の間に母材との相性の良い樹脂系の接着剤層を備えることができる。また、第1炭素繊維強化プラスチック層や第2炭素繊維強化プラスチック層の表面に傷が発生したり、表面が汚染されないよう、炭素繊維強化プラスチック板を使用する直前まで表面を保護する保護層や保護フィルム等を備えてもよい。
次に、上記した本発明の炭素繊維強化プラスチック板について、その製造方法を説明する。
硬化工程は、母材を含浸させた炭素繊維織布および炭素繊維不織布を硬化させる工程である。例えば母材が熱硬化性樹脂であれば、加熱させることで硬化させることができる。また、熱可塑性樹脂であれば、加熱溶融させた状態で炭素繊維織布および炭素繊維不織布に樹脂を含浸させた後に、常温まで冷却することで硬化させることができる。
本発明では、硬化工程後、第2炭素繊維強化プラスチック層をフライス加工する工程を設けてもよい、CFRP板の表面平滑性を向上させるべく、例えば表面の平面度は100mmあたり0.005~0.05mmにする場合には、フライス加工を行えばよい。
本発明の炭素繊維強化プラスチック板の製造方法は、硬化工程やフライス加工工程に加え、他の構成を備えてもよい。例えば、上記した炭素繊維の織布と不織布を積層する工程や、積層した炭素繊維へ母材を含浸させる含浸工程が挙げられる。
〈CFRP板の製造〉
(実施例1)
金型(内部寸法:15×15×1cm)内に炭素繊維織布(東レ株式会社製BT70-20)を2層重ね、さらに炭素繊維不織布(金井重要工業株式会社製CFZ-500SD)を2層重ねて4層構造とした炭素繊維を金型に配置した。そして、エポキシ樹脂主剤(三菱ケミカル株式会社製jER806)と硬化剤(東京化成工業株式会社製4,4’-メチレンビス(2-メチルシクロヘキシルアミン))を質量比で100:36の割合で混合後、100℃に加熱して密閉した金型内に混合した樹脂を0.5MPaの圧力で加圧注入した。混合した樹脂の注入後、100℃で20分の加熱硬化を行い、第1炭素繊維強化プラスチック層の厚さが0.8cm(0.4cm×2)、Vf57体積%、第2炭素繊維強化プラスチック層の厚さが0.2cm(0.1cm×2)、Vf28体積%である、CFRP板を得た。
金型(内部寸法:15×15×1cm)内に炭素繊維不織布(金井重要工業株式会社製CFZ-1000SD)を3層、その上に炭素繊維不織布(金井重要工業株式会社製CFZ-250SD)を1層重ね、合計4層の炭素繊維不織布を配置した。そして、エポキシ樹脂主剤(三菱ケミカル株式会社製jER806)と硬化剤(東京化成工業株式会社製4,4’-メチレンビス(2-メチルシクロヘキシルアミン))を質量比で100:36の割合で混合後、100℃に加熱して密閉した金型内に混合した樹脂を0.5MPaの圧力で加圧注入した。混合した樹脂の注入後、100℃で20分の加熱硬化を行い、厚みが10mm、Vf21%のCFRP板を得た。
金型(内部寸法:15×15×1cm)内に炭素繊維不織布(金井重要工業株式会社製CFZ-1000SD)を5層、その上に炭素繊維不織布(金井重要工業株式会社製CFZ-250SD)を1層重ね、合計6層の炭素繊維不織布を配置した。そして、エポキシ樹脂主剤(三菱ケミカル株式会社製jER806)と硬化剤(東京化成工業株式会社製4,4’-メチレンビス(2-メチルシクロヘキシルアミン))を質量比で100:36の割合で混合後、80℃に加熱して密閉した金型内に混合した樹脂を0.5MPaの圧力で加圧注入した。混合した樹脂の注入後、100℃で25分の加熱硬化を行い、厚みが10mm、Vf31%のCFRP板を得た。
金型(内部寸法:15×15×1cm)内に炭素繊維不織布(金井重要工業株式会社製CFZ-1000SD)を7層、その上に炭素繊維不織布(金井重要工業株式会社製CFZ-250SD)を1層重ね、合計8層の炭素繊維不織布を配置した。そして、エポキシ樹脂主剤(三菱ケミカル株式会社製jER806)と硬化剤(東京化成工業株式会社製4,4’-メチレンビス(2-メチルシクロヘキシルアミン))を質量比で100:36の割合で混合後、80℃に加熱して密閉した金型内に混合した樹脂を0.5MPaの圧力で加圧注入した。混合した樹脂の注入後、100℃で25分の加熱硬化を行い、厚みが10mm、Vf40%のCFRP板を得た。
縦12cm、横12cmの炭素繊維織布(東レ株式会社製BT70-20)を10層重ねた炭素繊維を金属板上に配置し、母材が漏えいしないように炭素繊維の周囲をフィルムとシーラントで密閉した。そして、エポキシ樹脂主剤(三菱ケミカル株式会社製jER806)と硬化剤(三菱ガス化学株式会社製1,3-BAC)を質量比で100:21の割合で混合後、VaRTM法により、混合した樹脂を炭素繊維へ注入した。注入後に室温硬化させ、さらに150℃、60分の条件で加熱硬化を行い、第1炭素繊維強化プラスチック層の厚さが2mm、Vf57体積%のCFRP板を得た。なお、炭素繊維不織布は使用しなかった。
製造した実施例1のCFRP板を3体使用し、第2炭素繊維強化プラスチック層の表面に対し、第2炭素繊維強化プラスチック層の厚さが0.1mmとなるまで、以下の条件によりフライス加工を行った。また、比較例1~4のCFRP板についても3体使用し、実施例1のCFRP板と同条件のフライス加工を行った。
装置:スクリューオン式汎用正面フライス(三菱マテリアル製)
カッタ型式:ASX44R10005D
インサート:SEGT13T3AGFN-JP HTi10
回転数:S=615min-1(V=193m/min)
送り速度:F=369mm/min
〈CFRP板の製造〉
実施例1と同様の製法により、炭素繊維織布および炭素繊維不織布を重ねて、エポキシ樹脂を注入し、室温硬化および加熱硬化させて、第1炭素繊維強化プラスチック層(Vf57体積%)と第2炭素繊維強化プラスチック層(Vf28体積%)の厚みが異なる炭素繊維強化プラスチック板110を3種類製造した。また、同様に、炭素繊維織布のみを用いたCFRP板および炭素繊維不織布のみを用いたCFRP板を製造した。すなわち、厚みが同じで炭素繊維織布および炭素繊維不織布の割合(表2、図3では「(織布/(織布+不織布))×100」と表記)が異なるCFRP板を5種製造した。
得られた5種類のCFRP板について、JIS K7074に基づき以下の条件にて曲げ試験を実施した。測定結果を表2、図3に示す。
試験速度:5mm/分
支点間距離L:L=40×h(80mm)
圧子の半径R1:R1=5mm
支持台の半径R2:R2=2mm
曲げ弾性率:接線法
このように、本発明の炭素繊維強化プラスチック板であれば、加工性、加工後の平滑性および強度を満足することができる。そのため、例えばプレス金型のダイセット部品等に利用可能であり、従来の金属製プレートと比べると重量は半分以下で、高速駆動する金型部品等に用いる等すれば、位置決め精度を高めることができる。
20 第2炭素繊維強化プラスチック層
100 炭素繊維強化プラスチック板
110 炭素繊維強化プラスチック板
Claims (6)
- 炭素繊維織布および母材を有する第1炭素繊維強化プラスチック層と、
炭素繊維不織布および母材を有する厚さ3mm以下の第2炭素繊維強化プラスチック層と、を備え、
第2炭素繊維強化プラスチック層は前記第1炭素繊維強化プラスチック層に積層する、炭素繊維強化プラスチック板であって、
板の厚みが5~100mmであり、
前記第2炭素繊維強化プラスチック層の平面度は100mmあたり0.005~0.05mmである、
炭素繊維強化プラスチック板。 - 前記母材が熱硬化性樹脂である、請求項1に記載の炭素繊維強化プラスチック板。
- 順に、前記第2炭素繊維強化プラスチック層と、前記第1炭素繊維強化プラスチック層と、前記第2炭素繊維強化プラスチック層と、が積層した積層体を備える、請求項1または2に記載の炭素繊維強化プラスチック板。
- 前記第2炭素繊維強化プラスチック層において、炭素繊維不織布の繊維体積含有率が20~40体積%である、請求項1~3のいずれかに記載の炭素繊維強化プラスチック板。
- 前記第1炭素繊維強化プラスチック層において、炭素繊維織布の繊維体積含有率が50~60体積%である、請求項1~4のいずれかに記載の炭素繊維強化プラスチック板。
- 請求項1~5のいずれかに記載の炭素繊維強化プラスチック板の製造方法であって、
母材を含浸させた炭素繊維織布および炭素繊維不織布を硬化させる硬化工程と、
前記硬化工程後、前記第2炭素繊維強化プラスチック層をフライス加工するフライス加工工程を含む、
炭素繊維強化プラスチック板の製造方法。
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| JPS5425987A (en) * | 1977-07-29 | 1979-02-27 | Toray Ind Inc | Molding method of a carbon fiber reinforced thermosetting resin |
| JPH0825253B2 (ja) * | 1987-05-19 | 1996-03-13 | 大倉工業株式会社 | 複合板 |
| JPH08134757A (ja) * | 1994-11-14 | 1996-05-28 | Kuraray Co Ltd | 補強材及びそれを用いた繊維補強樹脂成型物 |
| JP2008132705A (ja) * | 2006-11-29 | 2008-06-12 | Toray Ind Inc | 炭素繊維積層体およびそれを用いた炭素繊維強化樹脂 |
| WO2013015101A1 (ja) * | 2011-07-28 | 2013-01-31 | 三菱樹脂株式会社 | 炭素繊維強化炭素複合体およびその製造方法 |
| US10668674B2 (en) * | 2016-05-18 | 2020-06-02 | Dell Products L.P. | Apparatus and method for a high performance carbon fiber laminate enclosure part for an information handling system |
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| JP2002527588A (ja) | 1998-10-15 | 2002-08-27 | ブッチェル、トーマス | ポリウレタン素材からの成形体、並びにその製造方法と用途 |
| JP2005336407A (ja) | 2004-05-28 | 2005-12-08 | Toho Tenax Co Ltd | 表面平滑性に優れた複合材料 |
| JP2006051813A (ja) | 2004-07-14 | 2006-02-23 | Toray Ind Inc | 強化繊維基材、繊維強化プラスチック部材および繊維強化プラスチック部材の製造方法 |
| JP2006027091A (ja) | 2004-07-16 | 2006-02-02 | Toho Tenax Co Ltd | 平滑な表面を有する複合材料 |
| JP2007090811A (ja) | 2005-09-30 | 2007-04-12 | Toray Ind Inc | 繊維強化プラスチック部材および繊維強化プラスチック部材の製造方法 |
| JP2009152641A (ja) | 2009-04-02 | 2009-07-09 | Toyo Tanso Kk | 炭素繊維強化炭素複合材料 |
| JP5861941B2 (ja) | 2010-12-24 | 2016-02-16 | 東レ株式会社 | 炭素繊維集合体の製造方法および炭素繊維強化プラスチックの製造方法 |
| JP2014533772A (ja) | 2011-11-28 | 2014-12-15 | エボニック デグサ ゲーエムベーハーEvonik Degussa GmbH | 擬似熱可塑性の自己架橋性複合材 |
| WO2016017080A1 (ja) | 2014-07-31 | 2016-02-04 | 小松精練株式会社 | 成形体及びその製造方法 |
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| US20200384724A1 (en) | 2020-12-10 |
| TWI779294B (zh) | 2022-10-01 |
| TW202045596A (zh) | 2020-12-16 |
| CN112046093A (zh) | 2020-12-08 |
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