JP4458739B2 - Manufacturing method of molded products - Google Patents

Manufacturing method of molded products Download PDF

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Publication number
JP4458739B2
JP4458739B2 JP2002223747A JP2002223747A JP4458739B2 JP 4458739 B2 JP4458739 B2 JP 4458739B2 JP 2002223747 A JP2002223747 A JP 2002223747A JP 2002223747 A JP2002223747 A JP 2002223747A JP 4458739 B2 JP4458739 B2 JP 4458739B2
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Japan
Prior art keywords
impregnated
semi
thermosetting resin
prepreg
bag
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JP2002223747A
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JP2004059872A (en
JP2004059872A5 (en
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徹 金子
禎孝 梅元
清人 佐々木
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Toho Rayon Co Ltd
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Toho Rayon Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、発泡ビーズを含有する熱硬化性樹脂フィルムからなるセミ含浸プリプレグ用フィルムに関する。
【0002】
また、本発明は、発泡ビーズを含有する熱硬化性樹脂フィルムに繊維強化材を積重して貼着したセミ含浸プリプレグ及び当該プリプレグを用いた成形品の製造方法に関する。
【0003】
更に、本発明は、発泡ビーズを含有する熱硬化性樹脂フィルムと繊維強化材とを用いた成形品の製造方法に関する。
【0004】
【従来の技術】
プリプレグは、繊維強化材に熱硬化性樹脂を含浸し、手作業で容易に取扱うことができる程度に硬化反応を進めた成形材料である。主として、炭素繊維、ボロン繊維、アラミド繊維などの繊維強化材とエポキシ系の樹脂を用いて構成したプリプレグが用いられている。
【0005】
プリプレグの成形は、型に敷設した複数枚のプリプレグを加圧下で加熱硬化させることにより行う。プリプレグはその構造から表面にタックがあり、積層する際にプリプレグ間にエアーを噛み込む。外部から十分加圧することなく大気圧で加圧成形を行う真空バッグ成形はオートクレーブを必要とせず低い製造コストで容易に成形品を得ることができるが、プリプレグのタックが原因となって得られる成形品にはエアーの残存によるボイドが生じ、成形品の物性が低下してしまうという問題がある。
【0006】
このようなボイドの発生を防止するものとして、国際公開WO00/27632には、樹脂層の少なくとも一面に繊維強化材を積重した成形材料が開示されている。
【0007】
これらの成形材料を用いる方法は、外部から加圧を行うオートクレーブ成形を行わなくてもある程度はボイドの発生を抑制することができる。しかしながら、従来のプリプレグに比較すれば少ないものの、真空バッグ成形を行った場合には樹脂を含浸させる際にムラが生じ、ボイドやピンホールを生じることは避けられない。また、いずれの方法においても樹脂を繊維強化材に含浸させるのに時間がかかり、従来のプリプレグと比較して成形時間が長くなるという問題がある。
【0008】
【発明が解決しようとする課題】
本発明の目的は、外部から機械的に加圧することのない真空バッグ成形による成形を行ってもボイドやピンホールの発生を抑制し、しかも従来のセミ含浸プリプレグより樹脂が繊維強化材に含浸しやすく成形時間を短縮することができるセミ含浸プリプレグ及び成形品の製造方法を提供することにある。
【0009】
【課題を解決するための手段】
上記課題を解決する本発明は、以下に記載するものである。
【0010】
〔1〕 発泡ビーズを含有する熱硬化性樹脂フィルムからなるセミ含浸プリプレグ用フィルム。
【0011】
〔2〕 内部にキャリアを含有する〔1〕記載のセミ含浸プリプレグ用フィルム。
【0012】
〔3〕 発泡ビーズを含有する熱硬化性樹脂フィルムの片面又は両面に繊維強化材を貼着したセミ含浸プリプレグ。
【0013】
〔4〕 発泡ビーズの含有量が、熱硬化性樹脂100質量部に対して1〜20質量部である〔3〕に記載のセミ含浸プリプレグ。
【0014】
〔5〕 型の一面上に〔3〕に記載のセミ含浸プリプレグを敷設し、次いで敷設したセミ含浸プリプレグ上にバッグを重ねて当該バッグ周縁を型に気密にシールしてバッグと型との間を排気し、加熱することによりセミ含浸プリプレグを硬化させる成形品の製造方法。
【0015】
〔6〕 型の一面上に〔3〕に記載のセミ含浸プリプレグを敷設し、これらの上に一のバッグを重ねると共に当該バッグ周縁を型の他面を被覆した他のバッグに気密にシールし、次いでバッグと型との間を排気し、加熱することによりセミ含浸プリプレグを硬化させる成形品の製造方法。
【0016】
〔7〕 型の一面上に繊維強化材シート及び発泡ビーズを含有する熱硬化性樹脂フィルムを積重し、次いで積重した繊維強化材シート及び熱硬化性樹脂フィルム上にバッグを重ねて当該バッグ周縁を型に気密にシールしてバッグと型との間を排気し、繊維強化材シート及び熱硬化性樹脂フィルムを加熱する成形品の製造方法。
【0017】
〔8〕 型の一面上に繊維強化材シート及び発泡ビーズを含有する熱硬化性樹脂フィルムを積重し、次いで積重した繊維強化材シート及び熱硬化性樹脂フィルム上に一のバッグを重ねると共に当該バッグ周縁を型の他面を被覆した他のバッグに気密にシールし、次いでバッグと型との間を排気し、繊維強化材シート及び熱硬化性樹脂フィルムを加熱する成形品の製造方法。
【0018】
【発明の実施の形態】
本発明のセミ含浸プリプレグに用いる繊維強化材としては、炭素繊維、ガラス繊維、アラミド繊維、ボロン繊維、金属繊維等の通常のプリプレグに用いる強化繊維が使用できる。中でも、炭素繊維、ガラス繊維、アラミド繊維が好ましい。また、これらの繊維強化材の形態は、一方向に引き揃えたもの又は多方向に引き揃えたもの、織物、編物、不織布等の任意の加工品が利用できる。
【0019】
本発明のセミ含浸プリプレグにおいては、繊維強化材の目付は1枚当り200〜3000g/m2が好ましく、400〜2000g/m2がより好ましい。
【0020】
繊維強化材として織物を用いる場合はいずれの織形式のものでもよいが、面対称の織物を用いることが好ましい。又は、面対称でない織物を複数積重し面対称に積層できる織物が好ましい。面対称の織物あるいは積重して面対称とした織物を用いることにより、成形品とした際に成形品の反りを防止できる。
【0021】
面対称の織物又は積重して面対称とすることができる織物としては、多軸織物を挙げることができる。多軸織物とは、一方向に引き揃えたシート状の繊維強化材を角度を変えて積層し、ナイロン糸、ポリエステル糸、ガラス繊維糸等で編んだ織物をいう。
【0022】
面対称の多軸織物の一例の概略図を図5に示す。この例では多軸織物10は、繊維の引き揃えた方向が順に−45°、+45°、0°、+45°、−45°となるように積層した5層の繊維強化材を厚さ方向にパンチングしてなる。
【0023】
他の面対称の多軸織物の例としては、〔+45/−45/−45/+45〕、〔0/+45/−45/−45/+45/0〕等を挙げることができる。積重して面対称となる多軸織物の組合わせとしては、例えば〔+45/−45〕及び〔−45/+45〕、〔0/+45/−45〕及び〔−45/+45/0〕、〔+45/0/−45/90〕及び〔90/−45/0/+45〕等を挙げることができる。一方向に引き揃えた繊維強化材を積層する角度はこれらに限定されず、任意の角度とすることができる。
【0024】
多軸織物の厚さは、用途により適宜選択するものであるが、通常0.2〜3mmが好ましい。
【0025】
セミ含浸プリプレグの熱硬化性樹脂フィルムに用いる樹脂は、通常のプレプリグ製造に用いる熱硬化性樹脂が使用できる。具体的には、エポキシ樹脂、不飽和ポリエステル樹脂、フェノール樹脂、メラミン樹脂、ポリウレタン樹脂、シリコン樹脂、マレイミド樹脂、ビニルエステル樹脂、シアン酸エステル樹脂、マレイミド樹脂とシアン酸エステル樹脂を予備重合した樹脂等が挙げられ、本発明においてはこれらの樹脂の混合物を使用することもできる。繊維強化複合材料を用途とする場合には、耐熱性、弾性率、耐薬品性に優れたエポキシ樹脂組成物が好ましい。これらの熱硬化性樹脂には、硬化剤、硬化促進剤等が含まれていてもよい。
【0026】
熱硬化性樹脂は常温である程度の形状保持能を有する程度に高分子化したプレポリマーで、加熱時に粘度が0.1〜10Pa・sに減少するものが好ましい。
【0027】
熱硬化性樹脂の硬化温度は、60〜180℃となるよう調製することが好ましく、70〜130℃に調製することがより好ましい。
【0028】
樹脂フィルムの樹脂量はセミ含浸プリプレグ全重量に対して35〜55%とすることが好ましい。
【0029】
熱硬化性樹脂フィルムに配合する発泡ビーズは、後述するセミ含浸プリプレグの成形時の加熱により発泡して膨張するものであれば使用することができる。発泡ビーズとしては例えば低沸点炭化水素を内包する塩化ビニリデンとアクリロニトリルの共重合体粒子を挙げることができる。かかる発泡ビーズは市販品「マツモトマイクロスフェア」(松本油脂製薬社製)として入手できる。
【0030】
発泡ビーズの加熱前の平均粒径は、1〜150μmが好ましく、10〜20μmがより好ましい。また、加熱による体積膨張倍率が5〜100倍のものを使用することが好ましい。発泡ビーズの発泡温度は70〜150℃が好ましく、80〜130℃がより好ましい。更に熱硬化性樹脂フィルムにおける発泡ビーズの含有量は、熱硬化性樹脂100質量部に対して1〜20質量部とすることが好ましく、1〜5質量部とすることがより好ましい。
【0031】
上記発泡ビーズと加熱溶融した熱硬化性樹脂とを混練し公知の方法を用いて製造したフィルムは、本発明のセミ含浸プリプレグ用フィルムとして好適である。
【0032】
本発明のセミ含浸プリプレグを製造する場合に使用する樹脂フィルムは高粘度で保形性が悪く、取扱い難い。高粘度樹脂の取扱い性を高めるため、キャリアを使用することが好ましい。キャリアの片面又は両面に樹脂を塗布し樹脂層を形成した樹脂フィルムは保形性が付与され取扱い性に優れる。この樹脂フィルムに繊維強化材を下記の条件で加熱して貼着することによりキャリアを使用したセミ含浸プリプレグを製造できる。キャリアとしては、ガラス繊維シート、炭素繊維シート、アラミド繊維シート、ポリエチレンフィルム、セルロース繊維シートを用いることができる。キャリアを有する樹脂フィルムは、発泡ビーズを配合した熱硬化性樹脂をキャリアの片面又は両面に塗布することにより製造できる。
【0033】
キャリアの片面又は両面に熱硬化性樹脂を塗布した樹脂フィルムには、更に他のキャリアを貼着してもよい。また、キャリアを使用した樹脂フィルムは2枚以上を重ねて使用してもよい。キャリアを有する樹脂フィルムを複数枚積層してキャリアと樹脂層を交互に積層したものを本発明のセミ含浸プリプレグに使用できる。複数層のキャリアとすることによりセミ含浸プリプレグ全重量に対する樹脂の含有量を高めることができる。
【0034】
図1は、本発明のセミ含浸プリプレグの一例を示す概略図である。セミ含浸プリプレグ1は、発泡ビーズ6を含有する熱硬化性樹脂5からなる熱硬化性樹脂フィルム4に繊維強化材2及び3を貼着してなる。図1は熱硬化性樹脂フィルムの両面に繊維強化材を積重し貼着した場合を示すが、片面のみに貼着してもよい。
【0035】
繊維強化材2及び3は、熱硬化性樹脂フィルム4の熱硬化性樹脂5が含浸した樹脂含浸層7及び樹脂が含浸していない未含浸層8からなる。セミ含浸プリプレグ1は表面までは樹脂が含浸しておらず、従ってプリプレグの表面にタックが生じることはない。
【0036】
織物を繊維強化材シートとして用いる場合であって図1に示すように熱硬化性樹脂フィルムの両面に繊維強化材シートを積重したセミ含浸プリプレグを用いる場合にあっては、繊維強化材シート2及び3は樹脂フィルム4に対して互いに面対称であることが好ましい。互いに面対称の織物を用いることにより成形品とした場合に成形品の反りを防止することができる。繊維強化材シート2及び3は、それ自体が面対称であってもよいし、面対称でなくてもよい。
【0037】
図2は本発明のセミ含浸プリプレグの他の例を示すものである。この例にあっては、熱硬化性樹脂フィルム11はキャリア20とキャリア20の両面に形成した樹脂層14及び19からなり、フィルムのほぼ中央にキャリアを介装している。
【0038】
本発明セミ含浸プリプレグの製造方法は、上記発泡ビーズと加熱溶融した熱硬化性樹脂とを混練し、公知の方法により熱硬化性樹脂フィルムとする。次いで、この熱硬化性樹脂フィルムの片面又は両面に繊維強化材を積重し、0.01〜0.5MPaで加圧下、25〜100℃で0.1〜5分間加熱することにより製造することができる。熱硬化性樹脂フィルムにキャリアを用いる場合は、発泡ビーズと加熱溶融した熱硬化性樹脂を混練後キャリアに塗布し、次いで繊維強化材を貼着して製造する。
【0039】
繊維強化材への熱硬化性樹脂フィルムの樹脂の含浸は、プリプレグ表面まで樹脂が含浸しない程度であれば良いが、繊維強化材の厚さの5〜50%とすることが好ましい。
【0040】
なお、熱硬化性樹脂フィルム、セミ含浸プリプレグの製造時に行う加熱はいずれも発泡ビーズの発泡温度と比較して低温で行う加熱であってまた加熱時間も短時間であるため、発泡ビーズは膨張しない。
【0041】
以下、図3を参照して本発明のセミ含浸プリプレグを用いた成形品の製造方法について説明する。
【0042】
まず型24の一面上に繊維強化材2a及び3a、熱硬化性樹脂フィルム4aからなるセミ含浸プリプレグ1aを敷設する。プリプレグを敷設する際には必要によりピールクロス、ブリーダを使用することもできる。セミ含浸プリプレグ1aを敷設した後、バッグ22を重ねて配置し、バッグ22の周縁をシーラント26で型24と気密にシールし、密封する(図3(a))。
【0043】
バッグの材質は特に制限されず、通常用いられる公知のものを使用することができる。更に、バッグの形状としては特に制限されず、型や目的とする成形品の形状によりシート状、袋状等の形状を適宜選択して用いることができる。また、バッグのシールは減圧によりセミ含浸プリプレグが型に密着するように行うことができればよい。例えば、図3に示すようにバッグをシーラントで型に直接シールする方法、セミ含浸プリプレグを敷設した型を袋状のバッグに挿入しバッグ周縁を型にシールする方法、セミ含浸プリプレグ上に重ねて配置した一のバッグと型の他面に配置した他のバッグをシーラントで気密にシールする方法等を例示できる。バッグ同士をシールして型全体をバッグで覆う方法は、型を貫通する治具取付け孔があって型に直接シールしても密封できない場合や、型が通気性材料で形成されている場合等に特に有効である。
【0044】
バッグを用いてセミ含浸プリプレグを密封した後、型24とバッグ22間の気体を排気して減圧にする(図3(b))。型24とバッグ22間を減圧にすることにより、セミ含浸プリプレグ1aは型24に密着する。
【0045】
更に、オーブン等を用いて加熱することにより熱硬化性樹脂フィルムを溶融させると同時に発泡ビーズを膨張させ6bとして繊維強化材に熱硬化性樹脂を含浸させる。この状態で繊維強化材に含浸させた熱硬化性樹脂を加熱硬化させ硬化層2b、3bとして成形品を製造する(図3(c))。オーブン等による加熱温度は80〜130℃が好ましい。また、加熱を行う際には、型24とバッグ22間の気体を排気しながら行うことが好ましい。
【0046】
本発明の成形品の製造方法は、加熱により熱硬化性樹脂フィルムに配合した発泡ビーズを膨張させプリプレグの内側から加圧して溶融した熱硬化性樹脂を繊維強化材に含浸させやすくするものである。発泡ビーズの作用により熱硬化性樹脂を繊維強化材に含浸させる時間を短縮することができるうえ、従来のセミ含浸プリプレグでは避けられなかったボイドやピンホールの発生を抑制することができる。
【0047】
また、本発明は真空バッグ成形を利用して成形を行うので型に強い圧力がかからず、成形用型としては、金型のほか、FRP樹脂製等の比較的剛性の低い型を用いることができる。
【0048】
更に、本発明の製造方法においては発泡コア材を内部に挿入してもよい。発泡コア材を使用した製造方法の一例を図5に示す。
【0049】
型34上にセミ含浸プリプレグ41、発泡コア材38、セミ含浸プリプレグ40を順に敷設する。その後、バッグ32で密封した後、図3に示す場合と同様にバッグ内を減圧し、加熱成形を行う。発泡コア材としては、ウレタンフォーム、塩化ビニルフォーム、ポリメタアクリルイミドフォーム、アクリルフォーム、フェノールフォーム、ポリスチレンフォーム等が例示できる。また、バルサ材等も使用できる。
【0050】
本発明の成形品の製造方法においては、上記セミ含浸プリプレグに代えて、熱硬化性樹脂フィルムと繊維強化材シートとを用いてもよい。この場合、熱硬化性樹脂フィルム及び繊維強化材は上記のセミ含浸プリプレグに用いたものと同様のものを使用できる。
【0051】
【実施例】
以下、実施例により本発明を更に詳細に説明する。
【0052】
実施例1
エピコート828(ジャパンエポキシレジン社製)を80質量部、エピコート1001(ジャパンエポキシレジン社製)を20質量部、ジシアンジアミド(ジャパンエポキシレジン社製)を5質量部、3−(3,4−ジクロロフェニル)−1,1−ジメチルユリア(保士谷化学工業社製)を5質量部、発泡ビーズマツモトマイクロフェアー F‐30(松本油脂製薬社製)を3質量部計量し、70℃でロールミルで混錬し、樹脂組成物を得た。その後、70℃でドクターブレード法により樹脂目付1000g/m2の樹脂フィルムを作製し、樹脂フィルムの片面にガラス織物WP03(日東紡績社製)を貼り付け、キャリア付き樹脂フィルムを得た。
【0053】
キャリア付き樹脂フィルムの両面に、炭素繊維HTA−12K(東邦テナックス社製)を使用した多軸織物(〔0/+45/−45〕:CF目付 600g/m2)と(〔−45/+45/0〕:CF目付600g/m2)とを70℃に加熱した加熱ローラーで、圧力0.01MPaで、2m/分の速度で貼りあわせ、[0/+45/−45〕/樹脂フィルム/〔−45/+45/0〕のセミ含浸プリプレグを得た。
【0054】
離型処理をした平らなアルミ板の上に、寸法300mm×400mmの上記セミ含浸プリプレグ〔0/+45/−45〕/樹脂フィルム/〔−45/+45/0〕を積層し、その上にピールクロスを積層した。その後、積層した材料全体をナイロンバッグ(WRIGHTLON #7400、AIRTECH社製)で覆い、型とナイロンバッグをシーラントテープでシールし、バッグ内を真空ポンプで減圧した。
【0055】
その後、硬化炉内で130℃で2時間、真空ポンプで減圧しながらセミ含浸プリプレグを加熱硬化し、板圧1.5mmのCFRP板を得た。成形物表面には樹脂の未含浸によるカスレは無く、良好な板が得られた。
【0056】
比較例1
エピコート828(ジャパンエポキシレジン社製)を80質量部、エピコート1001(ジャパンエポキシレジン社製)を20質量部、ジシアンジアミド(ジャパンエポキシレジン社製)を5質量部、3−(3,4−ジクロロフェニル)−1,1−ジメチルユリア(保士谷化学工業社製)を5質量部計量し、70℃でロールミルで混錬し、樹脂組成物を得た。その後、70℃でドクターブレード法により樹脂目付1000g/m2の樹脂フィルムを作製し、樹脂フィルムの片面にガラス織物WP03(日東紡績社製)を貼り付け、キャリア付き樹脂フィルムを得た。
【0057】
キャリア付き樹脂フィルムの両面に、炭素繊維HTA−12K(東邦テナックス社製)を使用した多軸織物(〔0/+45/−45〕:CF目付 600g/m2)と(〔−45/+45/0〕:CF目付600g/m2)とを70℃に加熱した加熱ローラーで、圧力0.01MPaで、2m/分の速度で貼りあわせ、[0/+45/−45〕/樹脂フィルム/〔−45/+45/0〕のセミ含浸プリプレグを得た。
【0058】
離型処理をした平らなアルミ板の上に、寸法300mm×400mmの上記セミ含浸プリプレグ0/+45/−45〕/樹脂フィルム/〔−45/+45/0〕を積層し、その上にピールクロスを積層した。その後、積層した材料全体をナイロンバッグ(WRIGHTLON #7400、AIRTECH社製)で覆い、型とナイロンバッグをシーラントテープでシールし、バッグ内を真空ポンプで減圧した。
【0059】
その後、硬化炉内で130℃で2時間、真空ポンプで減圧しながらセミ含浸プリプレグを加熱硬化し、板圧1.5mmのCFRP板を得た。 成形物表面には1cm2の樹脂未含浸によるカスレが2箇所発生した。
【0060】
【発明の効果】
本発明のセミ含浸プリプレグは、熱硬化性樹脂フィルムに加熱により膨張する発泡ビーズが含有されるので、従来のセミ含浸プリプレグに比較して熱硬化性樹脂フィルムの樹脂が繊維強化材に含浸しやすい。
【0061】
また、上記のセミ含浸プリプレグ、又はセミ含浸プリプレグに代えて発泡ビーズを含有する熱硬化性樹脂フィルム及び繊維強化材シートを用いた成形品の製造方法は、真空バッグ成形を行っても、発泡ビーズの作用により熱硬化性樹脂を繊維強化材に含浸させる時間を短縮することができるうえ、従来のセミ含浸プリプレグでは避けられなかったボイドやピンホールの発生を抑制することができる。
【図面の簡単な説明】
【図1】 本発明のセミ含浸プリプレグの一例を示す概略斜視図である。
【図2】 本発明のセミ含浸プリプレグの他の例を示す概略斜視図である。
【図3】 本発明の成形品の製造方法の一例を示すフロー図で、(a)はセミ含浸プリプレグをバッグと型との間にシールした状態を示す断面図、(b)はバッグと型との間を減圧した状態を示す断面図、(c)は発泡ビーズが膨張し繊維強化材に樹脂を含浸させた状態を示す断面図である。
【図4】 本発明のセミ含浸プリプレグに用いられる多軸織物の一例を示す概略斜視図である。
【図5】 本発明の成形品の製造方法の他の例を示す図で、セミ含浸プリプレグと発泡コア材とをバッグと型との間にシールした状態を示す断面図である。
【符号の説明】
1、1a、10、40、41 セミ含浸プリプレグ
2、2a、3、3a、12、13、42、43 繊維強化材
2b、3b 硬化層
4、4a、11、44、45 熱硬化性樹脂フィルム
5、5a、15、15a、46、47 熱硬化性樹脂
6、6a、6b、16、48 発泡ビーズ
7、17 樹脂含浸層
8、18 未含浸層
14、19 樹脂層
20 キャリア
22、32 バッグ
24、34 型
26、36 シーラント
30 多軸織物
38 発泡コア材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film for semi-impregnated prepreg composed of a thermosetting resin film containing foam beads.
[0002]
The present invention also relates to a semi-impregnated prepreg obtained by stacking and sticking a fiber reinforcing material on a thermosetting resin film containing foam beads and a method for producing a molded product using the prepreg.
[0003]
Furthermore, the present invention relates to a method for producing a molded article using a thermosetting resin film containing foam beads and a fiber reinforcing material.
[0004]
[Prior art]
A prepreg is a molding material in which a fiber reinforced material is impregnated with a thermosetting resin and has undergone a curing reaction to such an extent that it can be easily handled by hand. A prepreg composed mainly of a fiber reinforcing material such as carbon fiber, boron fiber, or aramid fiber and an epoxy resin is used.
[0005]
The prepreg is formed by heat-curing a plurality of prepregs laid on a mold under pressure. The prepreg has a tack on the surface due to its structure, and air is caught between the prepregs when laminating. Vacuum bag molding that performs pressure molding at atmospheric pressure without applying sufficient pressure from the outside does not require an autoclave, and can easily obtain a molded product at a low production cost. However, molding that is obtained due to tackiness of the prepreg There is a problem that voids are generated in the product due to remaining air, and the physical properties of the molded product are deteriorated.
[0006]
As to prevent the occurrence of such voids, International Publication WO00 / 27632, the molding material obtained by stacking a fiber reinforcement on at least one surface of the resin layer that has been disclosed.
[0007]
The methods using these molding materials can suppress the generation of voids to some extent without performing autoclave molding in which pressure is applied from the outside. However, although less compared to conventional prepregs, when vacuum bag molding is performed, unevenness occurs when the resin is impregnated, and it is inevitable that voids and pinholes are generated. In any of the methods, it takes time to impregnate the fiber reinforcement with the resin, and there is a problem that the molding time is longer than that of the conventional prepreg.
[0008]
[Problems to be solved by the invention]
The object of the present invention is to suppress the generation of voids and pinholes even when molding by vacuum bag molding without mechanically pressurizing from the outside, and the resin impregnates the fiber reinforcement more than the conventional semi-impregnated prepreg. An object of the present invention is to provide a semi-impregnated prepreg and a method for producing a molded product, which can easily reduce the molding time.
[0009]
[Means for Solving the Problems]
The present invention for solving the above problems is described below.
[0010]
[1] A film for semi-impregnated prepreg comprising a thermosetting resin film containing expanded beads.
[0011]
[2] The film for semi-impregnated prepreg according to [1], which contains a carrier therein.
[0012]
[3] A semi-impregnated prepreg in which a fiber reinforcing material is attached to one side or both sides of a thermosetting resin film containing foam beads.
[0013]
[4] The semi-impregnated prepreg according to [3], wherein the content of the expanded beads is 1 to 20 parts by mass with respect to 100 parts by mass of the thermosetting resin.
[0014]
[5] The semi-impregnated prepreg according to [3] is laid on one side of the mold, and then a bag is stacked on the laid semi-impregnated prepreg, and the periphery of the bag is hermetically sealed between the mold and the bag. A method for producing a molded product in which the semi-impregnated prepreg is cured by evacuating and heating.
[0015]
[6] The semi-impregnated prepreg according to [3] is laid on one side of the mold, and one bag is overlaid on the prepreg, and the periphery of the bag is hermetically sealed to another bag covering the other side of the mold. Then, a method for producing a molded article, in which the space between the bag and the mold is evacuated and heated to cure the semi-impregnated prepreg.
[0016]
[7] A thermosetting resin film containing a fiber reinforcement sheet and foam beads is stacked on one surface of the mold, and then the bag is stacked on the stacked fiber reinforcement sheet and thermosetting resin film. A method for producing a molded product, wherein the periphery is hermetically sealed to a mold, the space between the bag and the mold is exhausted, and the fiber reinforcement sheet and the thermosetting resin film are heated.
[0017]
[8] A thermosetting resin film containing a fiber reinforcement sheet and foam beads is stacked on one side of the mold, and then one bag is overlaid on the stacked fiber reinforcement sheet and thermosetting resin film. A method for producing a molded product, wherein the bag periphery is hermetically sealed with another bag covering the other surface of the mold, and then the space between the bag and the mold is exhausted, and the fiber reinforcing material sheet and the thermosetting resin film are heated.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
As the fiber reinforcing material used in the semi-impregnated prepreg of the present invention, reinforcing fibers used in ordinary prepregs such as carbon fiber, glass fiber, aramid fiber, boron fiber, and metal fiber can be used. Among these, carbon fiber, glass fiber, and aramid fiber are preferable. In addition, as for the form of these fiber reinforcements, any processed product such as one aligned in one direction or one aligned in multiple directions, woven fabric, knitted fabric, non-woven fabric or the like can be used.
[0019]
In semi-impregnated prepreg of the present invention, the basis weight is preferably one per 200~3000g / m 2 of fiber reinforcement, and more preferably 400~2000g / m 2.
[0020]
When a woven fabric is used as the fiber reinforcement, any woven type may be used, but a plane-symmetric woven fabric is preferably used. Alternatively, a fabric in which a plurality of fabrics that are not plane-symmetric can be stacked and laminated in plane symmetry is preferable. By using a plane-symmetrical fabric or a piled and plane-symmetrical fabric, warping of the molded product can be prevented when the molded product is formed.
[0021]
Examples of the plane-symmetric fabric or the fabric that can be stacked to be plane-symmetric include multiaxial fabrics. A polyaxial woven fabric refers to a woven fabric in which sheet-like fiber reinforcements aligned in one direction are laminated at different angles and knitted with nylon yarn, polyester yarn, glass fiber yarn or the like.
[0022]
A schematic diagram of an example of a plane-symmetric multiaxial fabric is shown in FIG. In this example, the multiaxial woven fabric 10 includes five layers of fiber reinforcements laminated in the thickness direction so that the direction in which the fibers are aligned is −45 °, + 45 °, 0 °, + 45 °, and −45 ° in this order. Punched.
[0023]
Examples of other plane-symmetric multiaxial fabrics include [+ 45 / −45 / −45 / + 45] and [0 / + 45 / −45 / −45 / + 45/0]. For example, [+ 45 / −45] and [−45 / + 45], [0 / + 45 / −45] and [−45 / + 45/0], And [+ 45/0 / −45 / 90] and [90 / −45 / 0 / + 45]. The angle at which the fiber reinforcements aligned in one direction are laminated is not limited to these and can be any angle.
[0024]
The thickness of the polyaxial woven fabric is appropriately selected depending on the application, but is usually preferably 0.2 to 3 mm.
[0025]
As the resin used for the thermosetting resin film of the semi-impregnated prepreg, a thermosetting resin used for normal prepreg production can be used. Specifically, epoxy resin, unsaturated polyester resin, phenol resin, melamine resin, polyurethane resin, silicon resin, maleimide resin, vinyl ester resin, cyanate ester resin, resin obtained by prepolymerizing maleimide resin and cyanate ester resin, etc. In the present invention, a mixture of these resins can also be used. When a fiber reinforced composite material is used, an epoxy resin composition excellent in heat resistance, elastic modulus, and chemical resistance is preferable. These thermosetting resins may contain a curing agent, a curing accelerator and the like.
[0026]
The thermosetting resin is a prepolymer that has been polymerized to a certain extent so as to have a certain shape retention ability at room temperature, and preferably has a viscosity that decreases to 0.1 to 10 Pa · s upon heating.
[0027]
The curing temperature of the thermosetting resin is preferably adjusted to 60 to 180 ° C, more preferably 70 to 130 ° C.
[0028]
The resin amount of the resin film is preferably 35 to 55% with respect to the total weight of the semi-impregnated prepreg.
[0029]
The foamed beads to be blended in the thermosetting resin film can be used as long as they expand and expand by heating at the time of molding a semi-impregnated prepreg described later. Examples of the expanded beads include copolymer particles of vinylidene chloride and acrylonitrile enclosing low-boiling hydrocarbons. Such foam beads can be obtained as a commercial product “Matsumoto Microsphere” (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.).
[0030]
The average particle diameter of the expanded beads before heating is preferably 1 to 150 μm, and more preferably 10 to 20 μm. Moreover, it is preferable to use the one whose volume expansion ratio by heating is 5 to 100 times. The foaming temperature of the foamed beads is preferably 70 to 150 ° C, more preferably 80 to 130 ° C. Furthermore, it is preferable to set it as 1-20 mass parts with respect to 100 mass parts of thermosetting resins, and, as for content of the foam bead in a thermosetting resin film, it is more preferable to set it as 1-5 mass parts.
[0031]
A film produced by kneading the foamed beads and a thermosetting resin heated and melted using a known method is suitable as the film for semi-impregnated prepreg of the present invention.
[0032]
The resin film used for producing the semi-impregnated prepreg of the present invention has high viscosity, poor shape retention, and is difficult to handle. In order to improve the handleability of the high viscosity resin, it is preferable to use a carrier. A resin film in which a resin layer is formed by applying a resin on one or both sides of a carrier is imparted with shape retention and excellent in handleability. A semi-impregnated prepreg using a carrier can be produced by heating and adhering a fiber reinforcement to the resin film under the following conditions. As the carrier, a glass fiber sheet, a carbon fiber sheet, an aramid fiber sheet, a polyethylene film, or a cellulose fiber sheet can be used. The resin film having a carrier can be produced by applying a thermosetting resin containing foam beads to one or both sides of the carrier.
[0033]
Another carrier may be further adhered to the resin film in which the thermosetting resin is applied to one side or both sides of the carrier. Two or more resin films using a carrier may be used in an overlapping manner. A semi-impregnated prepreg of the present invention can be used by laminating a plurality of resin films having a carrier and alternately laminating carriers and resin layers. By using a carrier having a plurality of layers, the resin content relative to the total weight of the semi-impregnated prepreg can be increased.
[0034]
FIG. 1 is a schematic view showing an example of a semi-impregnated prepreg of the present invention. The semi-impregnated prepreg 1 is formed by sticking fiber reinforcing materials 2 and 3 to a thermosetting resin film 4 made of a thermosetting resin 5 containing foam beads 6. Although FIG. 1 shows the case where a fiber reinforcement is piled up and stuck on both sides of a thermosetting resin film, it may be stuck only on one side.
[0035]
The fiber reinforcements 2 and 3 are composed of a resin-impregnated layer 7 impregnated with the thermosetting resin 5 of the thermosetting resin film 4 and an unimpregnated layer 8 not impregnated with the resin. The semi-impregnated prepreg 1 is not impregnated with resin up to the surface, and therefore no tack is generated on the surface of the prepreg.
[0036]
In the case of using a woven fabric as a fiber reinforcing material sheet and using a semi-impregnated prepreg in which fiber reinforcing material sheets are stacked on both sides of a thermosetting resin film as shown in FIG. And 3 are preferably plane-symmetric with respect to the resin film 4. When using a symmetric fabric, it is possible to prevent warping of the molded product. The fiber reinforcing material sheets 2 and 3 may be plane symmetric per se or may not be plane symmetric.
[0037]
FIG. 2 shows another example of the semi-impregnated prepreg of the present invention. In this example, the thermosetting resin film 11 is composed of a carrier 20 and resin layers 14 and 19 formed on both surfaces of the carrier 20, and a carrier is interposed at substantially the center of the film.
[0038]
In the production method of the semi-impregnated prepreg of the present invention, the foamed beads and the heat-cured thermosetting resin are kneaded to obtain a thermosetting resin film by a known method. Subsequently, a fiber reinforcing material is stacked on one side or both sides of the thermosetting resin film, and is manufactured by heating at 25 to 100 ° C. for 0.1 to 5 minutes under a pressure of 0.01 to 0.5 MPa. Can do. In the case of using a carrier for the thermosetting resin film, the foamed beads and the thermosetting resin heated and melted are applied to the carrier after kneading, and then a fiber reinforcing material is adhered to manufacture.
[0039]
The fiber reinforcement may be impregnated with the resin of the thermosetting resin film as long as the resin is not impregnated to the prepreg surface, but is preferably 5 to 50% of the thickness of the fiber reinforcement.
[0040]
In addition, since the heating performed at the time of manufacturing the thermosetting resin film and the semi-impregnated prepreg is both performed at a low temperature compared with the foaming temperature of the foamed bead and the heating time is short, the foamed bead does not expand. .
[0041]
Hereinafter, a method for producing a molded product using the semi-impregnated prepreg of the present invention will be described with reference to FIG.
[0042]
First, the semi-impregnated prepreg 1a made of the fiber reinforcements 2a and 3a and the thermosetting resin film 4a is laid on one surface of the mold 24. When laying a prepreg, a peel cloth or a bleeder can be used if necessary. After laying the semi-impregnated prepreg 1a, the bag 22 is placed in an overlapping manner, and the periphery of the bag 22 is hermetically sealed with the mold 24 with a sealant 26 and sealed (FIG. 3 (a)).
[0043]
The material of the bag is not particularly limited, and commonly used known materials can be used. Furthermore, the shape of the bag is not particularly limited, and a sheet shape, a bag shape, or the like can be appropriately selected and used depending on the shape of the mold or the target molded product. Also, the bag may be sealed so that the semi-impregnated prepreg can be brought into close contact with the mold by decompression. For example, as shown in FIG. 3, a method of directly sealing a bag with a sealant, a method of inserting a mold laid with a semi-impregnated prepreg into a bag-like bag and sealing the periphery of the bag with a mold, and stacking on a semi-impregnated prepreg An example is a method of hermetically sealing one placed bag and another bag placed on the other side of the mold with a sealant. The method of sealing the bags together and covering the entire mold with the bag is when there is a jig mounting hole that penetrates the mold and cannot be sealed even when directly sealed to the mold, or when the mold is made of a breathable material, etc. Is particularly effective.
[0044]
After sealing the semi-impregnated prepreg using a bag, the gas between the mold 24 and the bag 22 is exhausted to reduce the pressure (FIG. 3B). By reducing the pressure between the mold 24 and the bag 22, the semi-impregnated prepreg 1 a is in close contact with the mold 24.
[0045]
Furthermore, the thermosetting resin film is melted by heating using an oven or the like, and at the same time, the foam beads are expanded to form 6b, and the fiber reinforcing material is impregnated with the thermosetting resin. In this state, the thermosetting resin impregnated in the fiber reinforcement is heated and cured to produce a molded product as the cured layers 2b and 3b (FIG. 3C). The heating temperature by an oven or the like is preferably 80 to 130 ° C. Moreover, it is preferable to perform heating while exhausting the gas between the mold 24 and the bag 22.
[0046]
The method for producing a molded article of the present invention is to easily expand a foamed bead blended in a thermosetting resin film by heating and to impregnate a fiber reinforcement with a thermosetting resin melted by applying pressure from the inside of the prepreg. . The time of impregnating the fiber reinforced material with the thermosetting resin can be shortened by the action of the foam beads, and the generation of voids and pinholes that could not be avoided with the conventional semi-impregnated prepreg can be suppressed.
[0047]
In addition, since the present invention performs molding using vacuum bag molding, a strong pressure is not applied to the mold, and a mold having a relatively low rigidity such as a FRP resin is used in addition to a mold. Can do.
[0048]
Furthermore, in the manufacturing method of the present invention, a foam core material may be inserted inside. An example of the manufacturing method using a foam core material is shown in FIG.
[0049]
A semi-impregnated prepreg 41, a foam core material 38, and a semi-impregnated prepreg 40 are laid on the mold 34 in this order. Then, after sealing with the bag 32, the inside of a bag is pressure-reduced similarly to the case shown in FIG. 3, and it heat-molds. Examples of the foam core material include urethane foam, vinyl chloride foam, polymethacrylimide foam, acrylic foam, phenol foam, and polystyrene foam. Also, balsa material can be used.
[0050]
In the method for producing a molded article of the present invention, a thermosetting resin film and a fiber reinforcing material sheet may be used instead of the semi-impregnated prepreg. In this case, the same thermosetting resin film and fiber reinforcing material as those used in the semi-impregnated prepreg can be used.
[0051]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
[0052]
Example 1
Epicoat 828 (manufactured by Japan Epoxy Resin) 80 parts by mass, Epicoat 1001 (manufactured by Japan Epoxy Resin) 20 parts by mass, dicyandiamide (manufactured by Japan Epoxy Resin) 5 parts by mass, 3- (3,4-dichlorophenyl) -1,1-dimethyl urea (manufactured by Hoshigaya Chemical Co., Ltd.) 5 parts by weight, foamed bead Matsumoto Microsphere F-30 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) 3 parts by weight, kneaded in a roll mill at 70 ° C Thus, a resin composition was obtained. Thereafter, a resin film having a resin basis weight of 1000 g / m 2 was prepared by a doctor blade method at 70 ° C., and glass fabric WP03 (manufactured by Nitto Boseki Co., Ltd.) was attached to one side of the resin film to obtain a resin film with a carrier.
[0053]
A multiaxial woven fabric ([0 / + 45 / −45]: CF basis weight 600 g / m 2 ) using carbon fiber HTA-12K (manufactured by Toho Tenax Co., Ltd.) on both sides of the resin film with a carrier and ([−45 / + 45 / 0]: CF basis weight of 600 g / m 2 ) was heated to 70 ° C. and bonded at a pressure of 0.01 MPa at a rate of 2 m / min, and [0 / + 45 / −45] / resin film / [− 45 / + 45/0] was obtained.
[0054]
The above-mentioned semi-impregnated prepreg [0 / + 45 / −45] / resin film / [− 45 / + 45/0] having a size of 300 mm × 400 mm is laminated on a flat aluminum plate subjected to a mold release treatment, and a peel is formed thereon. Cloth was laminated. Thereafter, the entire laminated material was covered with a nylon bag (WRIGHTLON # 7400, manufactured by AIRTECH), the mold and the nylon bag were sealed with a sealant tape, and the inside of the bag was decompressed with a vacuum pump.
[0055]
Thereafter, the semi-impregnated prepreg was heat-cured in a curing furnace at 130 ° C. for 2 hours while reducing the pressure with a vacuum pump to obtain a CFRP plate having a plate pressure of 1.5 mm. There was no scumming due to non-impregnation of the resin on the surface of the molded product, and a good plate was obtained.
[0056]
Comparative Example 1
Epicoat 828 (manufactured by Japan Epoxy Resin) 80 parts by mass, Epicoat 1001 (manufactured by Japan Epoxy Resin) 20 parts by mass, dicyandiamide (manufactured by Japan Epoxy Resin) 5 parts by mass, 3- (3,4-dichlorophenyl) 5 parts by mass of -1,1-dimethylurea (manufactured by Hoshigaya Chemical Co., Ltd.) was weighed and kneaded with a roll mill at 70 ° C. to obtain a resin composition. Thereafter, a resin film having a resin basis weight of 1000 g / m 2 was prepared by a doctor blade method at 70 ° C., and glass fabric WP03 (manufactured by Nitto Boseki Co., Ltd.) was attached to one side of the resin film to obtain a resin film with a carrier.
[0057]
A multiaxial woven fabric ([0 / + 45 / −45]: CF basis weight 600 g / m 2 ) using carbon fiber HTA-12K (manufactured by Toho Tenax Co., Ltd.) on both sides of the resin film with a carrier and ([−45 / + 45 / 0]: CF basis weight of 600 g / m 2 ) was heated to 70 ° C. and bonded at a pressure of 0.01 MPa at a rate of 2 m / min, and [0 / + 45 / −45] / resin film / [− 45 / + 45/0] was obtained.
[0058]
The above-mentioned semi-impregnated prepreg 0 / + 45 / −45] / resin film / [− 45 / + 45/0] having a size of 300 mm × 400 mm is laminated on a flat aluminum plate subjected to mold release treatment, and a peel cloth is formed thereon. Were laminated. Thereafter, the entire laminated material was covered with a nylon bag (WRIGHTLON # 7400, manufactured by AIRTECH), the mold and the nylon bag were sealed with a sealant tape, and the inside of the bag was decompressed with a vacuum pump.
[0059]
Thereafter, the semi-impregnated prepreg was heat-cured in a curing furnace at 130 ° C. for 2 hours while reducing the pressure with a vacuum pump to obtain a CFRP plate having a plate pressure of 1.5 mm. Two spots were generated on the surface of the molded article due to 1 cm 2 of resin not impregnated.
[0060]
【The invention's effect】
Since the semi-impregnated prepreg of the present invention contains expanded beads that are expanded by heating in the thermosetting resin film, the resin of the thermosetting resin film is more easily impregnated into the fiber reinforcement than the conventional semi-impregnated prepreg. .
[0061]
In addition, the above semi-impregnated prepreg, or a method for producing a molded article using a thermosetting resin film and a fiber reinforcing material sheet containing foam beads instead of the semi-impregnated prepreg, is not limited to foam bag beads. By this action, the time for impregnating the fiber reinforced resin with the thermosetting resin can be shortened, and the generation of voids and pinholes that could not be avoided with the conventional semi-impregnated prepreg can be suppressed.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an example of a semi-impregnated prepreg of the present invention.
FIG. 2 is a schematic perspective view showing another example of the semi-impregnated prepreg of the present invention.
FIG. 3 is a flowchart showing an example of a method for producing a molded article of the present invention, where (a) is a cross-sectional view showing a state where a semi-impregnated prepreg is sealed between a bag and a mold, and (b) is a bag and a mold. Sectional drawing which shows the state which pressure-reduced between these, (c) is sectional drawing which shows the state which the foam bead expanded and the fiber reinforcement material was impregnated with resin.
FIG. 4 is a schematic perspective view showing an example of a multiaxial fabric used for the semi-impregnated prepreg of the present invention.
FIG. 5 is a cross-sectional view showing another example of the method for producing a molded article of the present invention, showing a state where a semi-impregnated prepreg and a foamed core material are sealed between a bag and a mold.
[Explanation of symbols]
1, 1a, 10, 40, 41 Semi-impregnated prepreg 2, 2a, 3, 3a, 12, 13, 42, 43 Fiber reinforcement 2b, 3b Cured layer 4, 4a, 11, 44, 45 Thermosetting resin film 5 5a, 15, 15a, 46, 47 Thermosetting resin 6, 6a, 6b, 16, 48 Foam beads 7, 17 Resin impregnated layer 8, 18 Unimpregnated layer 14, 19 Resin layer 20 Carrier 22, 32 Bag 24, 34 type 26, 36 sealant 30 multiaxial fabric 38 foam core material

Claims (4)

発泡ビーズを含有し、常温で形状保持能を有するプレポリマーからなる熱硬化性樹脂フィルムの片面又は両面に繊維強化材シートを貼着した、繊維強化材シートが熱硬化性樹脂フィルムの熱硬化性樹脂が含浸した樹脂含浸層と含浸していない未含浸層とを有するセミ含浸プリプレグであって、発泡ビーズの含有量が熱硬化性樹脂100質量部に対して1〜20質量部、熱硬化性樹脂の樹脂量がセミ含浸プリプレグ全重量に対して35〜55%であり、熱硬化性樹脂フィルムの熱硬化性樹脂が繊維強化材シートの厚さの5〜50%含浸してなるセミ含浸プリプレグを型の一面上に敷設し、次いで敷設したセミ含浸プリプレグ上にバッグを重ねて当該バッグ周縁を型に気密にシールしてバッグと型との間を排気し、加熱することによりセミ含浸プリプレグを硬化させる成形品の製造方法。 Thermosetting resin sheet is a thermosetting resin film that contains foam beads and has a fiber reinforcing material sheet attached to one or both sides of a thermosetting resin film made of a prepolymer that has shape retention ability at room temperature. A semi-impregnated prepreg having a resin-impregnated layer impregnated with a resin and an unimpregnated layer not impregnated, and the content of foam beads is 1 to 20 parts by mass with respect to 100 parts by mass of the thermosetting resin. Semi-impregnated prepreg in which the resin amount of the resin is 35 to 55% with respect to the total weight of the semi-impregnated prepreg, and the thermosetting resin of the thermosetting resin film is impregnated with 5 to 50% of the thickness of the fiber reinforcing material sheet. It was laid set on one side of the mold and then hermetically sealed to the bag rim in the mold to overlap the bag laying the semi-impregnated onto prepreg evacuated between the bag and the mold, the semi-impregnated flop by heating Method for producing a molded article to cure the prepreg. 発泡ビーズを含有し、常温で形状保持能を有するプレポリマーからなる熱硬化性樹脂フィルムの片面又は両面に繊維強化材シートを貼着した、繊維強化材シートが熱硬化性樹脂フィルムの熱硬化性樹脂が含浸した樹脂含浸層と含浸していない未含浸層とを有するセミ含浸プリプレグであって、発泡ビーズの含有量が熱硬化性樹脂100質量部に対して1〜20質量部、熱硬化性樹脂の樹脂量がセミ含浸プリプレグ全重量に対して35〜55%であり、熱硬化性樹脂フィルムの熱硬化性樹脂が繊維強化材シートの厚さの5〜50%含浸してなるセミ含浸プリプレグを型の一面上に敷設し、敷設したセミ含浸プリプレグ上に一のバッグを重ねると共に当該バッグ周縁を型の他面を被覆した他のバッグに気密にシールし、次いでバッグと型との間を排気し、加熱することによりセミ含浸プリプレグを硬化させる成形品の製造方法。 Thermosetting resin sheet is a thermosetting resin film that contains foam beads and has a fiber reinforcing material sheet attached to one or both sides of a thermosetting resin film made of a prepolymer that has shape retention ability at room temperature. A semi-impregnated prepreg having a resin-impregnated layer impregnated with a resin and an unimpregnated layer not impregnated, and the content of foam beads is 1 to 20 parts by mass with respect to 100 parts by mass of the thermosetting resin. Semi-impregnated prepreg in which the resin amount of the resin is 35 to 55% with respect to the total weight of the semi-impregnated prepreg, and the thermosetting resin of the thermosetting resin film is impregnated with 5 to 50% of the thickness of the fiber reinforcing material sheet. It was laid set on one side of the mold and hermetically sealed to the other bag the bag periphery by coating the other surface of the mold with overlapping one bag laying the semi-impregnated on the prepreg, and then between the bag and the mold The Air, and the production method of a molded article to cure the semi-impregnated prepreg by heating. 繊維強化材シートの形態が、一方向に引き揃えたもの、多方向に引き揃えたもの、織物、編物、又は不織布である請求項1又は2に記載の成形品の製造方法The method for producing a molded article according to claim 1 or 2 , wherein the form of the fiber reinforcement sheet is one aligned in one direction, one aligned in multiple directions, a woven fabric, a knitted fabric, or a nonwoven fabric. 繊維強化材シートの目付が200〜3000g/mである請求項1又は2に記載の成形品の製造方法 Method for producing a molded article according to claim 1 or 2 basis weight of fiber-reinforced material sheet is 200~3000g / m 2.
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