JP2004323655A - Scrim cloth-laminated unidirectional prepreg and method for producing the same - Google Patents

Scrim cloth-laminated unidirectional prepreg and method for producing the same Download PDF

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JP2004323655A
JP2004323655A JP2003119532A JP2003119532A JP2004323655A JP 2004323655 A JP2004323655 A JP 2004323655A JP 2003119532 A JP2003119532 A JP 2003119532A JP 2003119532 A JP2003119532 A JP 2003119532A JP 2004323655 A JP2004323655 A JP 2004323655A
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scrim cloth
matrix resin
unidirectional prepreg
range
prepreg
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JP2003119532A
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JP4134805B2 (en
Inventor
Satoshi Mukai
聡 向井
Masabumi Kondo
正文 近藤
Hiroyuki Takagishi
宏至 高岸
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Toray Industries Inc
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Toray Industries Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a scrim cloth-laminated unidirectional prepreg capable of molding FRPs of excellent grade and properties through preventing a scrim cloth from debonding with its high adhesive strength, and to provide a method for producing the prepreg. <P>SOLUTION: The scrim cloth-laminated unidirectional prepreg is such that the peel strength of the scrim cloth at 24°C and 50% RH is ≥1,000 g/25mm and the loss percentage of the peel strength after left to stand for 7 days in the above atmosphere is ≤10%. The method for producing the prepreg comprises the following process: A sheet of unidirectionally arranged reinforcing fibers fed continuously is superimposed with the scrim cloth into a laminate, both sides of which are each superimposed with a release paper coated with a matrix resin on one side so that the coated surface turn on the laminate followed by heating under pressure to transfer and impregnate the matrix resin on both of the release papers onto and into the laminate, wherein the viscosity of the matrix resin on the release paper on the unidirectionally arranged sheet side is kept at 100-200 Pa s, while that on the scrim cloth side at 23-55 Pa s. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、スクリムクロス貼り合わせ一方向プリプレグとその製造方法に関する。
【0002】
【従来の技術】
よく知られているように、FRP(繊維強化プラスチック)の成形に、炭素繊維等の強化繊維と、B−ステージのエポキシ樹脂等のマトリクス樹脂とを複合してなるプリプレグが用いられている。プリプレグには多種多様なものがあるが、強化繊維の配向の方向や量を制御しやすいことから、強化繊維が一方向にシート状に引き揃えられている一方向プリプレグが多用されている。一方向プリプレグには、スクリムクロスが貼り合わされているものが多い。スクリムクロス貼り合わせ一方向プリプレグと呼ばれるものである。
【0003】
そのようなスクリムクロス貼り合わせ一方向プリプレグを用いて、たとえば釣竿やゴルフシャフト等の管状体を成形する場合、まず、スクリムクロス貼り合わせ一方向プリプレグを、強化繊維の方向が所望の方向になるように、かつ、所望の形状になるように裁断し、強化繊維の方向が所望の方向になるようにマンドレルに巻き付け、さらにその上に熱収縮性のラッピングテープを巻き付け、加熱してラッピングテープの熱収縮による加圧力を利用しながら成形するのが一般的である。スクリムクロスは、裁断時や巻付時等において強化繊維の配列が乱れるのを防止するとともに、成形される管状体に、強化繊維の引き揃え方向と直交する方向に若干の補強効果を与えるように作用する。
【0004】
さて、そのようなスクリムクロス貼り合わせ一方向プリプレグは、従来、強化繊維の一方向引き揃えシートにマトリクス樹脂を含浸して一方向プリプレグを得た後、その一方向プリプレグにスクリムクロスを重ね合わせ、加熱、加圧して一方向プリプレグにスクリムクロスを貼り合わせることによって製造している(たとえば、特許文献1参照)。すなわち、この方法は、一方向プリプレグのタック性を利用してスクリムクロスを貼り合わせるものである。しかしながら、この方法によるものは、スクリムクロスにはマトリクス樹脂が少量しか含浸されないのでスクリムクロスの接着強度が低く、スクリムクロスが浮き上がって空気を抱き込み、抱き込まれた空気がボイドとなってFRP中に残り、FRPの品位や特性を低下させるという問題がある。
【0005】
また、マトリクス樹脂を塗布した離型紙とスクリムクロスとを貼り合わせた後、それを強化繊維の一方向引き揃えシートにスクリムクロスが一方向引き揃えシート側を向くように重ね合わせ、加熱、加圧して離型紙上のマトリクス樹脂をスクリムクロスを通して一方向引き揃えシートに含浸するとともにスクリムクロスを貼り合わせる方法も提案されている(たとえば、特許文献2参照)。この方法によれば、マトリクス樹脂は、スクリムクロスには十分に含浸されるが、逆に、強化繊維の一方向引き揃えシートへの含浸は不十分になることがあり、その場合、やはり接着強度が不十分になってスクリムクロスが浮き上がりやすくなる。
【0006】
一方、強化繊維の一方向引き揃えシートとスクリムクロスとの重ね合わせ体の両面に、一面にマトリクス樹脂を塗布した離型紙を樹脂塗布面が重ね合わせ体側を向くように重ね合わせ、加熱、加圧して両離型紙上のマトリクス樹脂を重ね合わせ体に転移、含浸する方法も提案されている(たとえば、特許文献3参照)。この方法は、重ね合わせ体に対し、強化繊維の一方向引き揃えシート側とスクリムクロス側との双方からマトリクス樹脂を含浸するので、上述した2法にくらべるとマトリクス樹脂の含浸の均一性が高く、接着強度を高くできるのでスクリムクロスの浮き上がりを生じにくい。また、マトリクス樹脂の、強化繊維の一方向引き揃えシートへの含浸とスクリムクロスへの含浸を同時に行うので、生産性も高い。しかしながら、一方で、強化繊維の一方向引き揃えシートとスクリムクロスという形態の異なるものへの含浸を同一条件の下で行うために、希ではあるがマトリクス樹脂の含浸が不十分になることがあり、改善が望まれている。
【0007】
【特許文献1】
特公平4−60008号公報
【0008】
【特許文献2】
特開平11−960号公報
【0009】
【特許文献3】
特開昭60−157812号公報
【0010】
【発明が解決しようとする課題】
本発明の目的は、従来の技術の上述した問題点を解決し、スクリムクロスの接着強度が高くてスクリムクロスの浮き上がりを防止することができ、品位や特性に優れたFRPを成形することができるようになるスクリムクロス貼り合わせ一方向プリプレグとその製造方法を提供するにある。
【0011】
上記において、
【0012】
【課題を解決するための手段】
上記目的を達成するために、本発明は、強化繊維とマトリクス樹脂とを含む一方向プリプレグに、マトリクス樹脂が含浸されたスクリムクロスが貼り合わされており、温度24℃、湿度50%Rhの雰囲気下におけるスクリムクロスの剥離強度が少なくとも1,000g/25mmであり、かつ、上記雰囲気下に7日間放置したときの剥離強度の低下率が10%以下であることを特徴とするスクリムクロス貼り合わせ一方向プリプレグを提供する。
【0013】
上記において、強化繊維は炭素繊維であり、スクリムクロスはガラススクリムクロスであるのが好ましい。また、一方向プリプレグのマトリクス樹脂の目付は22〜78g/mの範囲内にあり、ガラススクリムクロスのそれは18〜62g/mの範囲内にあるのが好ましい。
【0014】
スクリムクロスの剥離強度は次のようにして測定する。すなわち、まず、スクリムクロス貼り合わせ一方向プリプレグを、強化繊維の方向を長さ方向として幅25mm、長さ300mmに裁断して試験片を得る。次に、試験片の一端から20mmまでの部分のスクリムクロスを剥がし、その剥がした部分においてスクリムクロスを引張試験機の一方のチャックに、一方向プリプレグを他方のチャックにそれぞれ装着する。そして、100mm/分の速度で引張試験を行い、スクリムクロスと一方向プリプレグとを180°方向に引き剥がしていく。その引き剥がし時の最大荷重をもって剥離強度とする。中途でスクリムクロスが破断してしまう場合には、破断時の荷重をもって剥離強度とする。かかる引張試験は、温度24℃、湿度50%Rhの雰囲気下で行う。そして、温度24℃、湿度50%Rhの雰囲気下におけるスクリムクロスの剥離強度、すなわち当初の剥離強度をSbとし、その雰囲気下に7日間放置したときの剥離強度をSaとし、剥離強度の低下率を次式によって求める。
【0015】
剥離強度の低下率(%)=((Sb−Sa)/Sb)×100
本発明は、また、上述したスクリムクロス貼り合わせ一方向プリプレグを製造する方法として、連続的に供給される強化繊維の一方向引き揃えシートにスクリムクロスを重ね合わせて重ね合わせ体とした後、その重ね合わせ体の両面に、一面にマトリクス樹脂を塗布した離型紙を塗布面が重ね合わせ体側を向くように重ね合わせ、加熱、加圧して両離型紙上のマトリクス樹脂を重ね合わせ体に転移、含浸するにあたり、一方向引揃えシート側の離型紙上のマトリクス樹脂の粘度を100〜200Pa・sの範囲内に維持するとともにスクリムクロス側のそれを23〜55Pa・sの範囲内に維持することを特徴とするスクリムクロス貼り合わせ一方向プリプレグの製造方法を提供する。
【0016】
上記において、強化繊維としては炭素繊維を用い、スクリムクロスとしてはガラススクリムクロスを用いるのが好ましい。また、ガラススクリムクロスの張力を4〜6Nの範囲内に維持するのが好ましい。さらに、加熱温度は100〜130℃の範囲内とし、加圧力は線圧で1〜3kgの範囲内とするのが好ましい。
【0017】
マトリクス樹脂の粘度は、JIS K 5600−2−3「塗料一般試験方法−第2部:塗料の性状・安定性−第3節:粘度(コーン・プレート粘度計法)」に準拠して測定する。なお、コーンの角度は0.8°、コーンの直径は48mmとし、測定時のずり速度は7.5sec−1、測定温度は100℃とする。
【0018】
【発明の実施の形態】
図1において、図示しない複数個のパッケージから引き出された強化繊維束1、・・・は、フリー回転する引き揃えロール2、3を経てコーム4に導かれ、一方向に互いに並行かつシート状に引き揃えられて一方向引き揃えシート5となる。この一方向引き揃えシート5には、導入ロール6を介して供給されるスクリムクロス7が上側から重ね合わせられる。
【0019】
次いで、一方向引き揃えシート5とスクリムクロス7との重ね合わせ体に、導入ロール8を介して供給される、一面にB−ステージの熱硬化性樹脂が塗布されている上側の離型紙9と、導入ロール10を介して導入される、同様に一面にB−ステージの熱硬化性樹脂が塗布されている下側の離型紙11とを樹脂塗布面が重ね合わせ体側を向くように重ね合わせ、重ね合わせ体を第1のヒータ12で加熱して熱硬化性樹脂の粘度を一旦下げた後、基体ロール13aとニップロール13bとからなる第1の含浸ロール13で加熱、加圧して強化繊維束1、・・・の押し拡げと離型紙9、11上の熱硬化性樹脂のスクリムクロス7および一方向引き揃えシート5への転移、含浸とを行う。かかる転移、含浸は、第2のヒータ14、基体ロール15aとニップロール15bとからなる第2の含浸ロール15、、さらに第3のヒータ16、基体ロール17aとニップロール17bとからなる第3の含浸ロール17によって3段に行う。かくして、スクリムクロス貼り合わせ一方向プリプレグが得られるが、熱硬化性樹脂の転移、含浸後は、導出ロール18、19を経て上側の離型紙9を剥離し、スクリムクロス貼り合わせ一方向プリプレグを下側の離型紙11ごとロール状に巻き取り、ロール体20とする。
【0020】
上記において、強化繊維束は、炭素繊維、黒鉛繊維、ガラス繊維、アラミド繊維、ガラス繊維等の高強度、高弾性率繊維からなる。最も好ましいのは炭素繊維である。炭素繊維を用いる場合、一方向引き揃えシートの目付は、通常、10〜300g/m程度の範囲内とする。
【0021】
マトリクス樹脂たる熱硬化性樹脂としては、エポキシ樹脂、不飽和ポリエステル樹脂、ビニルエステル樹脂等を用いることができる。これらのマトリクス樹脂は離型紙上に担持して供給されるが、その場合、得られるスクリムクロス貼り合わせ一方向プリプレグにおける一方向プリプレグのマトリクス樹脂の目付が22〜78g/mの範囲内にあり、ガラススクリムクロスのそれが18〜62g/mの範囲内になるように、担持させる熱硬化性樹脂の目付を調整するのが好ましい。一方向プリプレグのマトリクス樹脂の目付が低くなりすぎるとスクリムクロスとの接着強度が低くなり、スクリムクロスの剥離強度が低くなる傾向が現れる。また、目付が高くなりすぎると強化繊維の含有率が低くなり、FRPを成形したとき、特性のばらつきが大きくなる。それゆえ、一方向プリプレグのマトリクス樹脂の目付は22〜78g/mの範囲内とするのが好ましい。一方、スクリムクロスのマトリクス樹脂の目付は、低くなりすぎると一方向プリプレグとの接着強度が低くなり、スクリムクロスの剥離強度が低くなる傾向が現れる。また、目付が高くなりすぎると、スクリムクロスが目ずれを起こすことがあり、FRPを成形したとき、特性のばらつきが大きくなる。それゆえ、スクリムクロスのマトリクス樹脂の目付は18〜62g/mの範囲内とするのが好ましい。
【0022】
スクリムクロスは、通常は、ガラス繊維を織糸とする、目付が10〜100g/m程度、経糸密度が39〜60本/25.4mm程度、緯糸密度が47〜70本/25.4mm程度のものを用いる。ガラススクリムクロスは、一方向プリプレグの強化繊維の配列が乱れるのを防止するとともに、FRPを成形したとき、強化繊維の方向と直交する方向に若干の補強効果を与える。
【0023】
ガラススクリムクロスは、プロセス中においてその張力を4〜6Nの範囲内に維持するのが好ましい。ガラススクリムクロスの張力が低すぎると、マトリクス樹脂を含浸する際に皺ができることがあり、一方、高すぎると、目ずれを生ずることがある。それゆえ、張力は、そのような不都合を生ずる虞の少ない4〜6Nの範囲内とするのが好ましい。
【0024】
マトリクス樹脂の含浸時の温度は、100〜130℃の範囲内とするのが好ましい。含浸温度が低すぎると、一方向引き揃えシートやスクリムクロスにマトリクス樹脂が十分に含浸されない場合がある。また、高すぎると、含浸時のマトリクス樹脂の硬化が進むことがあり、その場合、得られる一方向プリプレグは硬くなり、スクリムクロスの剥離強度も低下するようになる。それゆえ、含浸時の温度は100〜130℃の範囲内とするのが好ましい。また、含浸時の圧力は、線圧で1〜3kgの範囲内とするのが好ましい。含浸時の圧力が低すぎると、強化繊維の一方向引き揃えシートやスクリムクロスにマトリクス樹脂が十分に含浸されないことがあり、その場合、スクリムクロスの剥離強度が低下する。また、圧力が高すぎると、スクリムクロスが目ずれを起こすことがあり、FRPを成形したとき、特性のばらつきが大きくなる。なお、上述の例では、マトリクス樹脂の含浸を3段(多段)で行う場合について説明した。多段で行うことが必須ではないが、多段にすると1段の場合よりも各段の圧力を低く設定することができ、スクリムクロスの目ずれ等の不都合を防止しながらマトリクス樹脂の含浸の均一性を向上させることができるようになるので好ましい。
【0025】
さて、本発明においては、強化繊維の一方向引揃えシート側の離型紙上のマトリクス樹脂の粘度を100〜200Pa・sの範囲内に維持するとともにスクリムクロス側のそれを23〜55Pa・sの範囲内に維持しながら含浸を行う。
【0026】
一方向引き揃えシート側の離型紙上のマトリクス樹脂の粘度が100Pa・sよりも低いと、一方向引き揃えシート内におけるマトリクス樹脂の流動性が高くなりすぎ、強化繊維の配列が乱れて一方向プリプレグの特性が低下したり、スクリムクロスに達するマトリクス樹脂の量が不足してスクリムクロスの剥離強度が大きく低下したりするようになる。一方、200Pa・sよりも高いと、マトリクス樹脂の流動が遅くなって一方向引き揃えシートにマトリクス樹脂が十分に含浸されなくなり、一方向プリプレグの特性が低下するようになる。また、スクリムクロスに達するマトリクス樹脂の量が不足してスクリムクロスの剥離強度が大きく低下するようになる。
【0027】
一方、スクリムクロス側の離型紙上のマトリクス樹脂の粘度が23Pa・sよりも低いと、マトリクス樹脂がスクリムクロスを素通りしてしまい、スクリムクロスの剥離強度が大きく低下するようになる。また、55Pa・sよりも高いと、マトリクス樹脂がスクリムクロスを通過しにくくなり、一方向引き揃えシートに達するマトリクス樹脂の量が不足してスクリムクロスの剥離強度が大きく低下するようになる。
【0028】
このように、強化繊維の一方向引揃えシート側の離型紙上のマトリクス樹脂の粘度を100〜200Pa・sの範囲内にせず、かつ、スクリムクロス側のそれを23〜55Pa・sの範囲内にしないときには、スクリムクロスの剥離強度が大きく低下してしまう。一方向引揃えシート側の離型紙上のマトリクス樹脂の粘度の好ましい範囲は140〜160Pa・sであり、スクリムクロス側のそれの好ましい範囲は30〜45Pa・sである。なお、マトリクス樹脂の粘度は、マトリクス樹脂を調製するときの粘度調節剤の配合量を変更することによって容易に調整することができる。
【0029】
かくして、温度24℃、湿度50%Rhの雰囲気下におけるスクリムクロスの剥離強度が少なくとも1,000g/25mmであり、かつ、上記雰囲気下に7日間放置したときの剥離強度の低下が10%以下であるスクリムクロス貼り合わせ一方向プリプレグが得られる。かかるプリプレグは、スクリムクロスの接着強度が極めて高く、また、その経時劣化も少ないために、スクリムクロスが浮き上がって空気を抱き込み、抱き込まれた空気がボイドとなってFRP中に残り、FRPの品位や特性を低下させるといった不都合を生ずる虞がほんどない。
【0030】
【実施例および比較例】
実施例1:
図1に示した方法を用い、スクリムクロス貼り合わせ一方向プリプレグを製造した。
【0031】
強化繊維としては、平均単繊維径7μm、単繊維数12,000本、引張強度4,900MPa、引張弾性率230GPaの炭素繊維を用い、炭素繊維の目付が100g/mになるように複数本を一方向に引き揃え、一方向引き揃えシートとした。
【0032】
また、マトリクス樹脂としては、フェノールノボラック型エポキシ樹脂とビスフェノールA型エポキシ樹脂とを重量比で7:3の割合で含む混合樹脂100重量部に対し、硬化剤としてジシアンジアミドと3−(3,4−ジクロロフェニル)−1、1ジメチル尿素とを重量比で5:3の割合で配合してなるものを基剤とした。そして、この基剤100重量部に対して粘度調節剤としてポリビニルホルマールを3重量部添加したもの(以下、マトリクス樹脂Aという)と、10重量部添加したもの(以下、マトリクス樹脂Bという)との2種類のマトリクス樹脂を用いた。マトリクス樹脂Aの130℃における粘度は30Pa・sであり、マトリクス樹脂Bのそれは150Pa・sである。
【0033】
さらに、上記マトリクス樹脂Aを目付が25g/mになるように塗布した離型紙(以下、離型紙Aという)と、上記マトリクス樹脂Bを目付が32g/mになるように塗布した離型紙(以下、離型紙Bという)との2種類の離型紙を用意した。
【0034】
一方向引き揃えシートの上から、張力を4Nに設定したガラススクリムクロス(目付:100g/m、経糸密度:60本/25.4mm、緯糸密度:51本/25.4mm)を重ね合わせ、さらにスクリムクロス側に離型紙Aを、一方向引き揃えシート側に離型紙Bを重ね合わせ、含浸ロールに通した。含浸ロールの温度は130℃とし、線圧は1段目が1.5kg/cm、2段目が1.5kg/cm、3段目が3.0kg/cmになるようにした。得られたスクリムクロス貼り合わせ一方向プリプレグの諸元は、以下のとおりであった。
【0035】
マトリクス樹脂の含有率 :32重量%
剥離強度(初期) :1,550g/25mm
剥離強度(7日間放置後):1,510g/25mm
剥離強度の低下率 :2.6%
実施例2:
実施例1において、マトリクス樹脂Aを基剤100重量部に対して粘度調節剤としてポリビニルホルマールを2重量部添加したものに変更し、マトリクス樹脂Bを基剤100重量部に対して粘度調節剤としてポリビニルホルマールを10重量部添加したものに変更した。マトリクス樹脂Aの100℃における粘度は25Pa・sであり、マトリクス樹脂Bのそれは110Pa・sである。また、含浸温度は100℃とした。得られたスクリムクロス貼り合わせ一方向プリプレグの諸元は、以下のとおりであった。
【0036】
マトリクス樹脂の含有率 :32重量%
剥離強度(初期) :1,460g/25mm
剥離強度(7日間放置後):1,420g/25mm
剥離強度の低下率 :2.7%
比較例1:
実施例1において、マトリクス樹脂Aを基剤100重量部に対して粘度調節剤としてポリビニルホルマールを6重量部添加したものに変更し、マトリクス樹脂Bを基剤100重量部に対して粘度調節剤としてポリビニルホルマールを15重量部添加したものに変更した。マトリクス樹脂Aの80℃における粘度は70Pa・sであり、マトリクス樹脂Bのそれは300Pa・sである。また、含浸温度は80℃とした。得られたスクリムクロス貼り合わせ一方向プリプレグの諸元は、以下のとおりであった。
【0037】
マトリクス樹脂の含有率 :32重量%
剥離強度(初期) :1,220g/25mm
剥離強度(7日間放置後):630g/25mm
剥離強度の低下率 :48.3%
比較例2:
実施例1において、マトリクス樹脂Aを基剤100重量部に対して粘度調節剤としてポリビニルホルマールを1重量部添加したものに変更し、マトリクス樹脂Bを基剤100重量部に対して粘度調節剤としてポリビニルホルマールを7重量部添加したものに変更した。マトリクス樹脂Aの130℃における粘度は15Pa・sであり、マトリクス樹脂Bのそれは85Pa・sである。得られたスクリムクロス貼り合わせ一方向プリプレグの諸元は、以下のとおりであった。
【0038】
マトリクス樹脂の含有率 :32重量%
剥離強度(初期) :1,150g/25mm
剥離強度(7日間放置後):570g/25mm
剥離強度の低下率 :50.4%
【0039】
【発明の効果】
本発明は、強化繊維とマトリクス樹脂とを含む一方向プリプレグに、マトリクス樹脂が含浸されたスクリムクロスが貼り合わされており、温度24℃、湿度50%Rhの雰囲気下におけるスクリムクロスの剥離強度が少なくとも1,000g/25mmであり、かつ、上記雰囲気下に7日間放置したときの剥離強度の低下率が10%以下であるスクリムクロス貼り合わせ一方向プリプレグを、連続的に供給される強化繊維の一方向引き揃えシートにスクリムクロスを重ね合わせて重ね合わせ体とした後、その重ね合わせ体の両面に、一面にマトリクス樹脂を塗布した離型紙を塗布面が重ね合わせ体側を向くように重ね合わせ、加熱、加圧して両離型紙上のマトリクス樹脂を重ね合わせ体に転移、含浸するにあたり、一方向引揃えシート側の離型紙上のマトリクス樹脂の粘度を100〜200Pa・sの範囲内に維持するとともにスクリムクロス側のそれを23〜55Pa・sの範囲内に維持することによって得るものであるから、実施例と比較例との対比からも明らかなように、スクリムクロスの接着強度が高くてスクリムクロスの浮き上がりを防止することができ、品位や特性に優れたFRPを成形することができるようになる。
【図面の簡単な説明】
【図1】本発明のスクリムクロス貼り合わせ一方向プリプレグを製造している様子を示す概略図である。
【符号の説明】
1:強化繊維束
2:引き揃えロール
3:引き揃えロール
4:コーム
5:強化繊維の一方向引き揃えシート
6:導入ロール
7:スクリムクロス
8:導入ロール
9:マトリクス樹脂を塗布した離型紙
10:導入ロール
11:マトリクス樹脂を塗布した離型紙
12:第1のヒータ
13:第1の含浸ロール
13a:基体ロール
13b:ニップロール
14:第2のヒータ
15:第2の含浸ロール
15a:基体ロール
15b:ニップロール
16:第3のヒータ
17:第3の含浸ロール
17a:基体ロール
17b:ニップロール
18:導出ロール
19:導出ロール
20:スクリムクロス貼り合わせ一方向プリプレグのロール体
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a scrim cloth bonded unidirectional prepreg and a method for manufacturing the same.
[0002]
[Prior art]
As is well known, a prepreg obtained by combining a reinforcing fiber such as a carbon fiber and a matrix resin such as a B-stage epoxy resin is used for molding FRP (fiber reinforced plastic). Although there are various types of prepregs, one-way prepregs in which reinforcing fibers are arranged in a sheet in one direction are frequently used because the direction and amount of orientation of reinforcing fibers are easily controlled. Many unidirectional prepregs have a scrim cloth bonded thereto. This is called a scrim cloth bonded one-way prepreg.
[0003]
When a tubular body such as a fishing rod or a golf shaft is formed by using such a scrim cloth bonded one-way prepreg, first, the scrim cloth bonded one-way prepreg is formed such that the direction of the reinforcing fiber is in a desired direction. And wrapping it around a mandrel so that the direction of the reinforcing fiber is in the desired direction, and then wrapping a heat-shrinkable wrapping tape on it and heating it to heat the wrapping tape. In general, molding is performed while utilizing a pressing force due to shrinkage. The scrim cloth prevents the arrangement of the reinforcing fibers from being disturbed at the time of cutting or winding, etc., and also gives the formed tubular body a slight reinforcing effect in a direction perpendicular to the direction in which the reinforcing fibers are aligned. Works.
[0004]
By the way, such a scrim cloth bonded one-way prepreg is conventionally, after obtaining a one-way prepreg by impregnating a one-way aligned sheet of reinforcing fibers with a matrix resin, and then laminating a scrim cloth on the one-way prepreg, It is manufactured by bonding a scrim cloth to a unidirectional prepreg by heating and pressing (for example, see Patent Document 1). That is, in this method, the scrim cloth is bonded using the tackiness of the one-way prepreg. However, according to this method, the scrim cloth is impregnated with only a small amount of the matrix resin, so that the adhesive strength of the scrim cloth is low, the scrim cloth rises and embraces air, and the embraced air becomes a void and becomes a void in the FRP. However, there is a problem that the quality and characteristics of the FRP are degraded.
[0005]
Also, after bonding the release paper coated with the matrix resin and the scrim cloth, it is superimposed on the unidirectional alignment sheet of the reinforcing fiber so that the scrim cloth faces the unidirectional alignment sheet, and heated and pressed. A method has also been proposed in which a matrix resin on release paper is impregnated into a one-way aligned sheet through a scrim cloth and the scrim cloth is bonded (for example, see Patent Document 2). According to this method, the matrix resin is sufficiently impregnated into the scrim cloth, but conversely, the impregnation of the reinforcing fiber in the unidirectionally aligned sheet may be insufficient, and in this case, the adhesive strength is also increased. Is insufficient, and the scrim cloth is easily lifted.
[0006]
On the other hand, release paper coated with matrix resin on one side is superimposed on both sides of the superimposed body of the one-way aligned sheet of reinforcing fibers and scrim cloth so that the resin application surface faces the superimposed body, and heating and pressing are performed. Also, a method of transferring and impregnating a matrix resin on both release papers into a superposed body has been proposed (for example, see Patent Document 3). This method impregnates the matrix resin with the matrix resin from both the unidirectionally aligned sheet and the scrim cloth side of the reinforcing fiber, so that the uniformity of the impregnation of the matrix resin is higher than the two methods described above. Since the bonding strength can be increased, the scrim cloth is hardly lifted. In addition, since the impregnation of the matrix resin with the unidirectional drawn sheet of the reinforcing fibers and the scrim cloth are simultaneously performed, the productivity is high. However, on the other hand, the impregnation of the unidirectionally aligned sheet of reinforcing fibers and a different form of scrim cloth under the same conditions is performed under the same conditions. There is a need for improvement.
[0007]
[Patent Document 1]
Japanese Patent Publication No. Hei 4-60008
[Patent Document 2]
JP-A-11-960
[Patent Document 3]
JP-A-60-157812
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to prevent the scrim cloth from floating due to high adhesive strength of the scrim cloth, and to form an FRP having excellent quality and characteristics. The present invention provides a scrim cloth bonded unidirectional prepreg and a method for manufacturing the same.
[0011]
In the above,
[0012]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a unidirectional prepreg containing a reinforcing fiber and a matrix resin is bonded with a scrim cloth impregnated with a matrix resin, in an atmosphere at a temperature of 24 ° C. and a humidity of 50% Rh. Wherein the peel strength of the scrim cloth is at least 1,000 g / 25 mm and the rate of decrease of the peel strength when left in the atmosphere for 7 days is 10% or less. Provide prepreg.
[0013]
In the above, the reinforcing fibers are preferably carbon fibers, and the scrim cloth is preferably a glass scrim cloth. Further, the basis weight of the matrix resin of the one-way prepreg is preferably in the range of 22 to 78 g / m 2 , and that of the glass scrim cloth is preferably in the range of 18 to 62 g / m 2 .
[0014]
The peel strength of the scrim cloth is measured as follows. That is, first, a scrim cloth bonded unidirectional prepreg is cut into a width of 25 mm and a length of 300 mm using the direction of the reinforcing fiber as a length direction to obtain a test piece. Next, the scrim cloth in a portion from one end of the test piece to 20 mm is peeled off, and the scrim cloth is mounted on one chuck of a tensile tester and the one-way prepreg is mounted on the other chuck at the peeled portion. Then, a tensile test is performed at a speed of 100 mm / min, and the scrim cloth and the one-way prepreg are peeled off in the 180 ° direction. The maximum load at the time of peeling is defined as the peel strength. If the scrim cloth breaks in the middle, the load at the time of break is defined as the peel strength. The tensile test is performed in an atmosphere at a temperature of 24 ° C. and a humidity of 50% Rh. The peel strength of the scrim cloth in an atmosphere at a temperature of 24 ° C. and a humidity of 50% Rh, that is, the initial peel strength is defined as Sb, and the peel strength when left in the atmosphere for 7 days is defined as Sa. Is determined by the following equation.
[0015]
Rate of decrease in peel strength (%) = ((Sb−Sa) / Sb) × 100
The present invention also provides a method for producing the above-described scrim cloth bonded unidirectional prepreg, wherein the scrim cloth is superimposed on a unidirectionally aligned sheet of reinforcing fibers continuously supplied to form a laminated body. On both sides of the laminated body, release paper coated with matrix resin on one side is overlaid so that the coated side faces the body side, and the matrix resin on both release papers is transferred and impregnated by heating and pressurizing. In doing so, it is necessary to maintain the viscosity of the matrix resin on the release paper on the one-way aligned sheet side in the range of 100 to 200 Pa · s and maintain that of the scrim cloth side in the range of 23 to 55 Pa · s. Provided is a method for manufacturing a one-way prepreg that is characterized by a scrim cloth.
[0016]
In the above, it is preferable to use carbon fiber as the reinforcing fiber and to use glass scrim cloth as the scrim cloth. Further, it is preferable to maintain the tension of the glass scrim cloth in the range of 4 to 6N. Further, the heating temperature is preferably in the range of 100 to 130 ° C., and the pressing force is preferably in the range of 1 to 3 kg in linear pressure.
[0017]
The viscosity of the matrix resin is measured in accordance with JIS K 5600-2-3 "General paint test method-Part 2: Properties and stability of paint-Section 3: Viscosity (cone-plate viscometer method)". . The cone angle is 0.8 °, the cone diameter is 48 mm, the shear rate at the time of measurement is 7.5 sec −1 , and the measurement temperature is 100 ° C.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
In FIG. 1, the reinforcing fiber bundles 1,... Drawn from a plurality of packages (not shown) are guided to a comb 4 via free-rolling aligning rolls 2, 3, and in a direction parallel to each other and in a sheet shape. After being aligned, the one-way alignment sheet 5 is obtained. A scrim cloth 7 supplied via an introduction roll 6 is overlaid on the one-way aligned sheet 5 from above.
[0019]
Next, an upper release paper 9 having a B-stage thermosetting resin applied on one side, which is supplied via an introduction roll 8 to a superimposed body of the one-way alignment sheet 5 and the scrim cloth 7, A lower release paper 11 which is introduced via the introduction roll 10 and which is also coated with the thermosetting resin of the B-stage on one side, and is overlapped so that the resin application surface faces the body side, The superposed body is heated by the first heater 12 to temporarily lower the viscosity of the thermosetting resin, and then heated and pressed by the first impregnating roll 13 composed of the base roll 13a and the nip roll 13b to thereby form the reinforcing fiber bundle 1. , And the transfer and impregnation of the thermosetting resin on the release papers 9 and 11 to the scrim cloth 7 and the one-way alignment sheet 5 are performed. Such transfer and impregnation are performed by a second heater 14, a second impregnation roll 15 composed of a base roll 15a and a nip roll 15b, and a third heater 16, a third impregnation roll composed of a base roll 17a and a nip roll 17b. 17 in three stages. Thus, a scrim cloth bonded unidirectional prepreg is obtained. After the transfer and impregnation of the thermosetting resin, the release paper 9 on the upper side is peeled off via the lead-out rolls 18 and 19, and the scrim cloth bonded unidirectional prepreg is lowered. The release paper 11 on the side is wound up in a roll shape to form a roll body 20.
[0020]
In the above description, the reinforcing fiber bundle is made of high-strength, high-modulus fibers such as carbon fiber, graphite fiber, glass fiber, aramid fiber, and glass fiber. Most preferred are carbon fibers. When using carbon fibers, the basis weight of the unidirectionally aligned sheet is usually in the range of about 10 to 300 g / m 2 .
[0021]
As the thermosetting resin serving as the matrix resin, an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, or the like can be used. These matrix resins are supplied while being carried on release paper. In this case, the basis weight of the matrix resin of the unidirectional prepreg in the obtained scrim cloth bonded unidirectional prepreg is in the range of 22 to 78 g / m 2 . It is preferable to adjust the basis weight of the thermosetting resin to be supported such that that of the glass scrim cloth is in the range of 18 to 62 g / m 2 . If the basis weight of the one-way prepreg matrix resin is too low, the adhesive strength with the scrim cloth will be low, and the peel strength of the scrim cloth will tend to be low. On the other hand, if the basis weight is too high, the content of the reinforcing fibers will be low, and when FRP is molded, the variation in characteristics will be large. Therefore, it is preferable that the basis weight of the matrix resin of the one-way prepreg is in the range of 22 to 78 g / m 2 . On the other hand, if the basis weight of the matrix resin of the scrim cloth is too low, the adhesive strength with the one-way prepreg tends to be low, and the peel strength of the scrim cloth tends to be low. In addition, if the basis weight is too high, misalignment of the scrim cloth may occur, and when FRP is formed, the characteristics vary greatly. Therefore, the basis weight of the matrix resin of the scrim cloth is preferably in the range of 18 to 62 g / m 2 .
[0022]
The scrim cloth is usually made of glass fiber as a woven yarn, and has a basis weight of about 10 to 100 g / m 2 , a warp density of about 39 to 60 yarns / about 25.4 mm, and a weft density of about 47 to 70 yarns / about 25.4 mm. Use The glass scrim cloth not only prevents the arrangement of the reinforcing fibers of the one-way prepreg from being disturbed, but also provides a slight reinforcing effect in a direction orthogonal to the direction of the reinforcing fibers when the FRP is formed.
[0023]
The glass scrim cloth preferably maintains its tension in the range of 4-6N during the process. If the tension of the glass scrim cloth is too low, wrinkles may occur when the matrix resin is impregnated, while if it is too high, misalignment may occur. Therefore, it is preferable that the tension is in the range of 4 to 6N where such a disadvantage is less likely to occur.
[0024]
The temperature at the time of impregnation of the matrix resin is preferably in the range of 100 to 130 ° C. If the impregnation temperature is too low, the one-way aligned sheet or scrim cloth may not be sufficiently impregnated with the matrix resin. On the other hand, if it is too high, the curing of the matrix resin at the time of impregnation may proceed, and in that case, the obtained one-way prepreg becomes hard and the peel strength of the scrim cloth also decreases. Therefore, the temperature at the time of impregnation is preferably in the range of 100 to 130 ° C. The pressure at the time of impregnation is preferably in the range of 1 to 3 kg in linear pressure. If the pressure during the impregnation is too low, the matrix resin may not be sufficiently impregnated into the unidirectionally aligned sheet of reinforcing fibers or the scrim cloth, and in this case, the peel strength of the scrim cloth decreases. On the other hand, if the pressure is too high, misalignment may occur in the scrim cloth, and when the FRP is formed, the characteristics vary greatly. In the above-described example, the case where the matrix resin is impregnated in three stages (multistage) has been described. Although it is not essential to perform the process in multiple stages, the pressure in each stage can be set lower than in the case of one stage, and uniformity of the impregnation of the matrix resin while preventing inconvenience such as misalignment of the scrim cloth can be achieved. It is preferable because it becomes possible to improve
[0025]
By the way, in the present invention, the viscosity of the matrix resin on the release paper on the one-way aligned sheet side of the reinforcing fibers is maintained within the range of 100 to 200 Pa · s, and the viscosity on the scrim cloth side is 23 to 55 Pa · s. The impregnation is performed while maintaining the range.
[0026]
When the viscosity of the matrix resin on the release paper on the one-way aligned sheet side is lower than 100 Pa · s, the fluidity of the matrix resin in the one-way aligned sheet becomes too high, and the arrangement of reinforcing fibers is disturbed and The properties of the prepreg are deteriorated, or the amount of the matrix resin reaching the scrim cloth is insufficient, and the peel strength of the scrim cloth is greatly reduced. On the other hand, if it is higher than 200 Pa · s, the flow of the matrix resin is slowed, and the one-way aligned sheet is not sufficiently impregnated with the matrix resin, and the properties of the one-way prepreg deteriorate. In addition, the amount of the matrix resin reaching the scrim cloth is insufficient, and the peel strength of the scrim cloth is greatly reduced.
[0027]
On the other hand, when the viscosity of the matrix resin on the release paper on the scrim cloth side is lower than 23 Pa · s, the matrix resin passes through the scrim cloth, and the peel strength of the scrim cloth is greatly reduced. On the other hand, when the pressure is higher than 55 Pa · s, it becomes difficult for the matrix resin to pass through the scrim cloth, and the amount of the matrix resin reaching the one-way aligned sheet is insufficient, so that the peel strength of the scrim cloth is greatly reduced.
[0028]
As described above, the viscosity of the matrix resin on the release paper on the one-way aligned sheet side of the reinforcing fibers is not set within the range of 100 to 200 Pa · s, and the viscosity of the matrix resin on the scrim cloth side is set within the range of 23 to 55 Pa · s. Otherwise, the peel strength of the scrim cloth is greatly reduced. The preferred range of the viscosity of the matrix resin on the release paper on the one-way aligned sheet side is 140 to 160 Pa · s, and the preferred range thereof on the scrim cloth side is 30 to 45 Pa · s. The viscosity of the matrix resin can be easily adjusted by changing the amount of the viscosity modifier when preparing the matrix resin.
[0029]
Thus, the peel strength of the scrim cloth in an atmosphere at a temperature of 24 ° C. and a humidity of 50% Rh is at least 1,000 g / 25 mm, and the decrease in peel strength when left in the atmosphere for 7 days is 10% or less. A certain scrim cloth bonded unidirectional prepreg is obtained. Such a prepreg has a very high adhesive strength of the scrim cloth and its deterioration with time is small, so that the scrim cloth floats and embraces the air, and the entrapped air becomes a void and remains in the FRP. There is almost no risk of inconvenience such as deterioration of quality and characteristics.
[0030]
[Examples and Comparative Examples]
Example 1
Using the method shown in FIG. 1, a scrim cloth bonded unidirectional prepreg was manufactured.
[0031]
As the reinforcing fibers, carbon fibers having an average single fiber diameter of 7 μm, a number of single fibers of 12,000, a tensile strength of 4,900 MPa, and a tensile modulus of 230 GPa are used. A plurality of carbon fibers are used so that the basis weight of the carbon fibers becomes 100 g / m 2. Were aligned in one direction to form a one-way aligned sheet.
[0032]
As a matrix resin, 100 parts by weight of a mixed resin containing a phenol novolak type epoxy resin and a bisphenol A type epoxy resin in a weight ratio of 7: 3, dicyandiamide and 3- (3,4- Dichlorophenyl) -1 and 1-dimethylurea were mixed at a weight ratio of 5: 3 to prepare a base. Then, 3 parts by weight of polyvinyl formal (hereinafter, referred to as matrix resin A) as a viscosity modifier and 10 parts by weight (hereinafter, referred to as matrix resin B) were added to 100 parts by weight of the base. Two types of matrix resins were used. The viscosity of the matrix resin A at 130 ° C. is 30 Pa · s, and that of the matrix resin B is 150 Pa · s.
[0033]
Further, release paper coated with the matrix resin A so as to have a basis weight of 25 g / m 2 (hereinafter referred to as release paper A), and release paper coated with the matrix resin B so as to have a basis weight of 32 g / m 2 (Hereinafter referred to as release paper B).
[0034]
A glass scrim cloth (weight per unit area: 100 g / m 2 , warp density: 60 threads / 25.4 mm, weft density: 51 threads / 25.4 mm) with a tension set to 4N was overlaid on the one-way aligned sheet. Further, release paper A was placed on the scrim cloth side, release paper B was placed on the one-way aligned sheet side, and passed through an impregnating roll. The temperature of the impregnating roll was 130 ° C., and the linear pressure was 1.5 kg / cm for the first stage, 1.5 kg / cm for the second stage, and 3.0 kg / cm for the third stage. The specifications of the obtained scrim cloth bonded unidirectional prepreg were as follows.
[0035]
Matrix resin content: 32% by weight
Peel strength (initial): 1,550 g / 25 mm
Peel strength (after standing for 7 days): 1,510 g / 25 mm
Decrease in peel strength: 2.6%
Example 2:
In Example 1, the matrix resin A was changed to a composition in which 2 parts by weight of polyvinyl formal was added as a viscosity adjuster to 100 parts by weight of a base, and the matrix resin B was used as a viscosity adjuster to 100 parts by weight of a base. It changed to what added polyvinyl formal 10 weight part. The viscosity of the matrix resin A at 100 ° C. is 25 Pa · s, and that of the matrix resin B is 110 Pa · s. The impregnation temperature was 100 ° C. The specifications of the obtained scrim cloth bonded unidirectional prepreg were as follows.
[0036]
Matrix resin content: 32% by weight
Peel strength (initial): 1,460 g / 25 mm
Peel strength (after standing for 7 days): 1,420 g / 25 mm
Peel strength reduction rate: 2.7%
Comparative Example 1:
In Example 1, the matrix resin A was changed to that in which 6 parts by weight of polyvinyl formal was added as a viscosity modifier to 100 parts by weight of a base, and the matrix resin B was used as a viscosity modifier to 100 parts by weight of a base. It changed to what added polyvinyl formal 15 weight part. The viscosity of the matrix resin A at 80 ° C. is 70 Pa · s, and that of the matrix resin B is 300 Pa · s. The impregnation temperature was 80 ° C. The specifications of the obtained scrim cloth bonded unidirectional prepreg were as follows.
[0037]
Matrix resin content: 32% by weight
Peel strength (initial): 1,220 g / 25 mm
Peel strength (after standing for 7 days): 630 g / 25 mm
Rate of decrease in peel strength: 48.3%
Comparative Example 2:
In Example 1, the matrix resin A was changed to a composition in which 1 part by weight of polyvinyl formal was added as a viscosity adjuster to 100 parts by weight of the base, and the matrix resin B was used as a viscosity adjuster to 100 parts by weight of the base. It changed to what added polyvinyl formal 7 weight part. The viscosity of the matrix resin A at 130 ° C. is 15 Pa · s, and that of the matrix resin B is 85 Pa · s. The specifications of the obtained scrim cloth bonded unidirectional prepreg were as follows.
[0038]
Matrix resin content: 32% by weight
Peel strength (initial): 1,150 g / 25 mm
Peel strength (after standing for 7 days): 570 g / 25 mm
Decrease in peel strength: 50.4%
[0039]
【The invention's effect】
According to the present invention, a unidirectional prepreg containing a reinforcing fiber and a matrix resin is bonded with a scrim cloth impregnated with a matrix resin, and the peel strength of the scrim cloth under an atmosphere of a temperature of 24 ° C. and a humidity of 50% Rh is at least. A scrim cloth bonded unidirectional prepreg, which is 1,000 g / 25 mm and has a decrease rate of peel strength of 10% or less when left in the above atmosphere for 7 days, is supplied to a reinforcing fiber continuously supplied. After the scrim cloth is superimposed on the direction alignment sheet to form a superimposed body, release paper coated with matrix resin on one side is superimposed on both sides of the superimposed body so that the application surface faces the body side, and heating is performed. In order to transfer and impregnate the matrix resin on both release papers into a superposed body by applying pressure, the unidirectional Since the viscosity of the matrix resin on the paper is obtained by maintaining the viscosity of the matrix resin within the range of 100 to 200 Pa · s and maintaining that of the scrim cloth side within the range of 23 to 55 Pa · s, Examples and Comparative Examples As is clear from the comparison of the above, the scrim cloth has a high adhesive strength, can prevent the scrim cloth from floating, and can form an FRP excellent in quality and characteristics.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a state in which a scrim cloth bonded unidirectional prepreg of the present invention is being manufactured.
[Explanation of symbols]
1: Reinforcing fiber bundle 2: Alignment roll 3: Alignment roll 4: Comb 5: Unidirectional alignment sheet for reinforced fiber 6: Introducing roll 7: Scrim cloth 8: Introducing roll 9: Release paper 10 coated with matrix resin : Introducing roll 11: Release paper 12 coated with matrix resin 12: First heater 13: First impregnating roll 13 a: Base roll 13 b: Nip roll 14: Second heater 15: Second impregnating roll 15 a: Base roll 15 b : Nip roll 16: Third heater 17: Third impregnating roll 17 a: Base roll 17 b: Nip roll 18: Outgoing roll 19: Outgoing roll 20: Scrim cloth bonded unidirectional prepreg roll body

Claims (7)

強化繊維とマトリクス樹脂とを含む一方向プリプレグに、マトリクス樹脂が含浸されたスクリムクロスが貼り合わされており、温度24℃、湿度50%Rhの雰囲気下におけるスクリムクロスの剥離強度が少なくとも1,000g/25mmであり、かつ、上記雰囲気下に7日間放置したときの剥離強度の低下率が10%以下であることを特徴とするスクリムクロス貼り合わせ一方向プリプレグ。A scrim cloth impregnated with a matrix resin is bonded to a unidirectional prepreg containing a reinforcing fiber and a matrix resin, and the peel strength of the scrim cloth under an atmosphere of a temperature of 24 ° C. and a humidity of 50% Rh is at least 1,000 g / cm 2. A scrim cloth bonded unidirectional prepreg, which is 25 mm and has a peel strength reduction rate of 10% or less when left in the atmosphere for 7 days. 強化繊維が炭素繊維であり、スクリムクロスがガラススクリムクロスである、請求項1に記載のスクリムクロス貼り合わせ一方向プリプレグ。The scrim cloth bonded unidirectional prepreg according to claim 1, wherein the reinforcing fibers are carbon fibers, and the scrim cloth is a glass scrim cloth. 一方向プリプレグのマトリクス樹脂の目付が22〜78g/mの範囲内にあり、ガラススクリムクロスのそれが18〜62g/mの範囲内にある、請求項1または2に記載のスクリムクロス貼り合わせ一方向プリプレグ。There basis weight of the matrix resin of the unidirectional prepreg is in the range of 22~78g / m 2, that of the glass scrim cloth is in the range of 18~62g / m 2, bonded scrim cloth according to claim 1 or 2 One-way prepreg. 連続的に供給される強化繊維の一方向引き揃えシートにスクリムクロスを重ね合わせて重ね合わせ体とした後、その重ね合わせ体の両面に、一面にマトリクス樹脂を塗布した離型紙を塗布面が重ね合わせ体側を向くように重ね合わせ、加熱、加圧して両離型紙上のマトリクス樹脂を重ね合わせ体に転移、含浸するにあたり、一方向引揃えシート側の離型紙上のマトリクス樹脂の粘度を100〜200Pa・sの範囲内に維持するとともにスクリムクロス側のそれを23〜55Pa・sの範囲内に維持することを特徴とするスクリムクロス貼り合わせ一方向プリプレグの製造方法。After the scrim cloth is superimposed on the unidirectional drawing sheet of the reinforcing fiber that is continuously supplied to form a superimposed body, the release surface coated with matrix resin is coated on both sides of the superimposed body. When the matrix resin on both release papers is transferred and impregnated by heating and pressurizing the matrix resin on both release papers so that they face each other, the viscosity of the matrix resin on the release paper on the one-way alignment sheet side is 100 to 100. A method for producing a scrim cloth bonded unidirectional prepreg, characterized in that it is maintained within a range of 200 Pa · s and that of a scrim cloth side is maintained within a range of 23 to 55 Pa · s. 強化繊維として炭素繊維を用い、スクリムクロスとしてガラススクリムクロスを用いる、請求項5に記載のスクリムクロス貼り合わせ一方向プリプレグの製造方法。The method for producing a unidirectional prepreg according to claim 5, wherein carbon fiber is used as the reinforcing fiber and glass scrim cloth is used as the scrim cloth. ガラススクリムクロスの張力を4〜6Nの範囲内に維持する、請求項4または5に記載のスクリムクロス貼り合わせ一方向プリプレグの製造方法。The method for producing a unidirectional prepreg according to claim 4 or 5, wherein the tension of the glass scrim cloth is maintained within a range of 4 to 6N. 加熱温度を100〜130℃の範囲内とし、加圧力を線圧で1〜3kgの範囲内とする、請求項4〜6のいずれかに記載のスクリムクロス貼り合わせ一方向プリプレグの製造方法。The method for producing a unidirectional prepreg according to any one of claims 4 to 6, wherein the heating temperature is in the range of 100 to 130 ° C, and the pressing force is in the range of 1 to 3 kg in linear pressure.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006264236A (en) * 2005-03-25 2006-10-05 Toho Tenax Co Ltd Fire-resistant hybrid composite material, vessel using it and its manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006264236A (en) * 2005-03-25 2006-10-05 Toho Tenax Co Ltd Fire-resistant hybrid composite material, vessel using it and its manufacturing method
JP4723270B2 (en) * 2005-03-25 2011-07-13 東邦テナックス株式会社 Method for forming container using flame retardant hybrid composite material

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