JPH01283113A - Manufacture of prepreg - Google Patents
Manufacture of prepregInfo
- Publication number
- JPH01283113A JPH01283113A JP11378688A JP11378688A JPH01283113A JP H01283113 A JPH01283113 A JP H01283113A JP 11378688 A JP11378688 A JP 11378688A JP 11378688 A JP11378688 A JP 11378688A JP H01283113 A JPH01283113 A JP H01283113A
- Authority
- JP
- Japan
- Prior art keywords
- varnish
- impregnating
- prepreg
- thickness
- passes
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000002966 varnish Substances 0.000 claims abstract description 57
- 238000001035 drying Methods 0.000 claims abstract description 22
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000002759 woven fabric Substances 0.000 claims description 21
- 239000004744 fabric Substances 0.000 abstract description 10
- 239000006260 foam Substances 0.000 abstract description 3
- 238000005470 impregnation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000001816 cooling Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、平滑な表面を持ち、かつ気泡のないプリプ
レグの製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing a prepreg having a smooth surface and no bubbles.
従来より、織布にワニスを含浸させた後、乾燥させてＢ
ステージ状態にしたプリプレグは、複合材料製造用の材
料として広く用いられている。すなわち、プリプレグは
、取り扱いや保管に非常に便利で、これを積層して加熱
成形やオートクレブ成形すれば、所望のＦＲＰ製品を製
造することができる。Traditionally, woven fabric is impregnated with varnish and then dried.
Prepreg in a staged state is widely used as a material for manufacturing composite materials. In other words, prepregs are very convenient to handle and store, and by laminating them and subjecting them to heat molding or autoclave molding, a desired FRP product can be manufactured.
この種のプリプレグの製造法としては、−数的に第２図
に示すようなプリプレグ製造装置を用いる方法が知られ
ている。As a method for manufacturing this type of prepreg, a method using a prepreg manufacturing apparatus as numerically shown in FIG. 2 is known.
この製造法を同装置を引用しながら説明すると、次のと
おりである。This manufacturing method will be explained with reference to the same apparatus as follows.
まず、ロール状に巻かれた織布１は、引き出されてアキ
ュムレータ２を通り、プレ含＆ ｊｆｌ ４ ａ中のブ
レ含浸ワニス５ａに接したプレ含浸ロール３上を通過す
る。その過程で織布１は、下面より気泡を追い出しなが
らワニス５ａを含浸する。ここにいうアキュムレータ２
は、織布両端の接着時に、−時、織布１を貯留する装置
である。さらに、織布１は、本含浸Ｎｌ４ｂ中の本含浸
ワニス５ｂ中に浸漬され、あらかじめ所定の間隔に調整
されたギャップロール６の間を通過する。この過程で、
織布１に所望の量のワニスが付着する。ワニスが付着し
、かつこれを含浸した織布１は、最初の乾燥炉７ａを通
り、ここで主に溶剤の乾燥が行われる。ついで、冷却さ
れたロール８ａ、８ｂの上を通過した後、仕上げ乾燥炉
７ｂでＢ−ステージ状態になるまで乾燥が行われる。First, the woven fabric 1 wound into a roll is drawn out, passes through an accumulator 2, and passes over a pre-impregnated roll 3 that is in contact with a blur-impregnated varnish 5a in a pre-impregnated & jfl 4 a. In the process, the woven fabric 1 is impregnated with the varnish 5a while expelling air bubbles from the lower surface. Accumulator 2 here
is a device that stores the woven fabric 1 at - time when both ends of the woven fabric are bonded. Further, the woven fabric 1 is immersed in the main impregnated varnish 5b in the main impregnated Nl4b, and is passed between gap rolls 6 whose intervals are adjusted in advance to a predetermined interval. In this process,
A desired amount of varnish is deposited on the woven fabric 1. The woven fabric 1 to which the varnish is attached and impregnated therewith passes through the first drying oven 7a, where the solvent is mainly dried. Then, after passing over the cooled rolls 8a and 8b, drying is performed in a finishing drying oven 7b until it reaches the B-stage state.
乾燥後の織布１は、冷却ロール９のトを通った後、巻き
取られてプリプレグロール１０となる。After drying, the woven fabric 1 passes through the cooling roll 9 and is then wound up into a prepreg roll 10.
〔発明が解決しようとする３ｍ）
以上は従来のプリプレグの製造法を工程順にみたもので
あるが、この製造法によって得られるプリプレグには次
の２つの欠点があった。[3m to be Solved by the Invention] The above is a step-by-step view of the conventional prepreg manufacturing method, but the prepreg obtained by this manufacturing method has the following two drawbacks.
その一つは、プリプレグ内部に気泡（ボイド）が残存す
ることである。この気泡は、ワニス槽中にどうしても存
在する気泡がワニス塗膜厚が厚いため破泡しきれないで
プリプレグ中に残存したものである。このような現象は
、厚物の織布を用いた時やワニスの付着量を多くした時
に顕著であった。One of them is that air bubbles (voids) remain inside the prepreg. These bubbles are bubbles that inevitably exist in the varnish bath, but cannot be completely broken due to the thickness of the varnish coating, and remain in the prepreg. This phenomenon was noticeable when a thick woven fabric was used or when the amount of varnish applied was increased.
もう一つは、プリプレグの表面に凹凸ができ、平滑な而
が得られないことである。このような凹凸は、織布中に
存在する糸のケバ立ちによって起こる場合と、ワニス塗
膜厚が厚いために、溶剤乾燥時に、表面層が内部より早
く乾燥して、高粘度となり、破泡した後のレベリング性
が忠くなるために起こる場合とがある。Another problem is that the surface of the prepreg is uneven, making it impossible to obtain a smooth surface. Such unevenness may be caused by the fuzzing of the threads present in the woven fabric, or because the varnish coating is thick, the surface layer dries faster than the inside when the solvent dries, resulting in high viscosity and foam breakage. This may occur because the leveling performance becomes more accurate after
この発明は、上記の欠点を解消するためになされたもの
で、プリプレグ中の気泡をなくし、かつ表面の平滑性を
向上させることのできるプリプレグの製造法を得ること
を目的とする。This invention was made to eliminate the above-mentioned drawbacks, and aims to provide a prepreg manufacturing method that can eliminate air bubbles in the prepreg and improve surface smoothness.
この発明によるプリプレグの製造法は、織布にワニスを
含浸させてから、そのワニスを乾燥させるに際し、第一
段階として、織布にその厚さの１．０〜１．５倍の厚さ
のワニスを付着させて、その中の溶剤量が樹脂固形分に
対し５．０〜３０％になるまで乾燥させ、第二段階とし
て、前記乾燥させたワニスの上に所定の厚さになるまで
ワニスを付着させて乾燥させることを特徴とする方法で
ある。The prepreg manufacturing method according to the present invention involves impregnating a woven fabric with varnish and then drying the varnish. A varnish is applied and dried until the amount of solvent in it becomes 5.0 to 30% based on the resin solid content, and in the second step, varnish is applied on the dried varnish to a predetermined thickness. This method is characterized by attaching and drying.
（作用〕
この発明の製造法においては、従来−段階で行わわてい
たワニスの含浸工程を二段階に分けて行うので、第一段
階ではワニス中ｎｑが厚すぎるために生じる気泡の残存
や破泡後のレベリング不足による表面の凹凸の発生を防
ぐことができる。また、＆ｉ布のケバについても、第一
段階でワニスをある程度乾燥させてケバ立ちをおさえて
おくことができるので、第二段階でのワニス中布によっ
て、プリプレグの表面に凹凸ができない。(Function) In the manufacturing method of the present invention, the varnish impregnation process, which was conventionally carried out in two stages, is carried out in two stages. It can prevent the occurrence of surface irregularities due to insufficient leveling after foaming.In addition, the varnish can be dried to some extent in the first stage and the fuzz can be suppressed, so the second stage The varnished inner cloth prevents unevenness on the surface of the prepreg.
（実施例） 次に、この発明の一実施例を第１図によって説明する。(Example) Next, one embodiment of the present invention will be described with reference to FIG.
この実施例は同図に示すプリプレグ製造装置を用いた方
法である。なお、第１図中の符号は、従来例を示す第２
図中のそれと対応している。This example is a method using the prepreg manufacturing apparatus shown in the figure. Note that the symbols in FIG. 1 indicate the conventional example.
It corresponds to that in the figure.
第１図において、ロール状に巻かれた織布１は、引き出
されてアキュムレータ２を通り、プレ含浸Ｎｌ４ａ中の
ブレ含浸ワニス６ａに接したプレ含浸ロール３上を通過
する。その過程で織布１は、下面より気泡を追い出しな
がらワニス５ａを含浸する。さらに、織布１は、第一次
含浸ｊｆＩ４ｂ中の第一次含浸ワニス５ｂ中に浸漬され
、第一次ギャップロール６ａの間を通過する。このとき
、第一次ギャップロール６ａの間隔は、織布１の厚ａ（
７）１．０〜１．５倍に調整されている。この工程では
、ワニスは薄く付着するので、後の工程の乾燥時にワニ
ス内部の気泡が破泡しやすくなるし、織布１中のケバを
ある程度抑えこむことができる。In FIG. 1, a rolled fabric 1 is drawn out, passes through an accumulator 2, and passes over a pre-impregnated roll 3 which is in contact with a blur-impregnated varnish 6a in a pre-impregnated Nl 4a. In the process, the woven fabric 1 is impregnated with the varnish 5a while expelling air bubbles from the lower surface. Furthermore, the fabric 1 is dipped into the primary impregnation varnish 5b in the primary impregnation jfI4b and passed between the primary gap rolls 6a. At this time, the distance between the primary gap rolls 6a is determined by the thickness a(
7) Adjusted to 1.0 to 1.5 times. In this step, since the varnish is applied thinly, the air bubbles inside the varnish are easily broken during drying in the subsequent step, and fuzz in the woven fabric 1 can be suppressed to some extent.
第一次ギャップロール６ａの間を織布１の厚みの１．０
〜１．５倍とするのは、次の理由による。すなわち、１
．０倍未満では、織布１の通過がスムーズに行われず、
目ズレや布切れ等の不具合の原因となるからである。1.0 of the thickness of the woven fabric 1 between the primary gap rolls 6a
The reason why it is set to 1.5 times is as follows. That is, 1
．． If it is less than 0 times, the woven fabric 1 will not pass smoothly,
This is because it may cause problems such as misalignment and tearing of the cloth.
また、１．５倍を越えると、ワニスの塗膜厚が厚すぎる
ため、溶剤乾燥時に、表面層が内部より早く乾燥して高
粘度となり、ワニス中の気泡が破泡しにくくなるからで
あり、破泡してもその後のレベリング性が悪くなワて、
プリプレグ表面の平滑性が失われるからである。In addition, if it exceeds 1.5 times, the varnish coating thickness will be too thick, and when the solvent dries, the surface layer will dry faster than the inside, resulting in a high viscosity, making it difficult for the bubbles in the varnish to burst. , even if the bubbles break, the subsequent leveling performance is poor.
This is because the smoothness of the prepreg surface is lost.
このようにして第一次含浸工程を経た織布ｌは、第一次
乾燥炉７ａ内と第一次冷却ロール８ａ、８ｂの上を通っ
た後、第二次乾燥炉７ｂを通過する。The woven fabric l that has undergone the first impregnation step in this manner passes through the first drying oven 7a and over the first cooling rolls 8a and 8b, and then passes through the second drying oven 7b.
第−次及び第二次乾燥炉を通過すると、第一次含浸工程
で織布１に付着したワニスは、その溶剤量が樹脂固形分
に対し５．０〜３０％になるまで乾燥される。ここで、
溶剤量を５．０〜３０％になるまで乾燥する理由は、５
．０％未満の乾燥であると、次の第二次含浸工程で含浸
乾燥される樹脂層との間に、最終的なプリプレグの状態
で明らかに反応度が進み、フローが少ない別の層を内部
に形成することになり、積層プレス時にプリプレグ内部
に気泡が残存しやすくなるからであり、３０％を越える
まで乾燥すると、第二次含浸されたワニスとの間に層を
形成することはないが、プリプレグの内部気泡や表面平
滑性の改良に対する効果が期待できないからである。After passing through the first and second drying ovens, the varnish that adhered to the fabric 1 in the first impregnation step is dried until the amount of solvent becomes 5.0 to 30% based on the resin solid content. here,
The reason for drying until the solvent amount is 5.0 to 30% is 5.
．． If the dryness is less than 0%, the degree of reactivity will clearly progress in the final prepreg state between the resin layer that is impregnated and dried in the next second impregnation step, and another layer with less flow will be inserted inside. This is because air bubbles tend to remain inside the prepreg during lamination pressing, and if it dries to more than 30%, it will not form a layer between it and the secondary impregnated varnish. This is because it cannot be expected to be effective in improving the internal bubbles and surface smoothness of the prepreg.
このように乾燥度を調整された織布１は、さらに第二次
含浸層４ｃ中の第二次含浸ワニス５ｃ中に浸漬され、最
終的に必要な量のワニスが付着したプリプレグ１０が得
られるように調整された第二次ギャップロール６ｂの間
を通過する。ついで、さらに第二次乾燥炉７ｃ内と第二
次冷却ロール８ｃ、８ｄの上を通った後、第四次乾燥炉
７ｄを通過して第三次冷却ロール９の」二を通った後、
巻き取られてプリプレグロール１０となる。The woven fabric 1 whose degree of dryness has been adjusted in this way is further immersed in the second impregnated varnish 5c in the second impregnated layer 4c, and finally a prepreg 10 with a required amount of varnish attached is obtained. It passes between the secondary gap rolls 6b adjusted as follows. Then, after passing through the second drying oven 7c and over the second cooling rolls 8c and 8d, passing through the fourth drying oven 7d and passing through the third cooling roll 9,
It is wound up to become a prepreg roll 10.
なお、上述したプレ含浸ワニス５ａ、第一次含浸ワニス
５ｂ、第二次含浸ワニス５ｃはそれぞれ同じワニスであ
っても、もちろんこの発明の効果は得られる。しかし、
製造されたプリプレグ中の気泡をさらに減少させるには
、プレ含浸ワニスまたはプレ含浸ワニスと第−次合浸ワ
ニスの溶剤量を、第二次含浸ワニスより増やして低粘度
にすると効果的である。Note that even if the above-mentioned pre-impregnation varnish 5a, primary impregnation varnish 5b, and secondary impregnation varnish 5c are the same varnish, the effects of the present invention can of course be obtained. but,
To further reduce air bubbles in the prepared prepreg, it is effective to increase the amount of solvent in the pre-impregnated varnish or the pre-impregnated varnish and the secondary impregnated varnish to lower the viscosity compared to the secondary impregnated varnish.
ちなみに、ブレ、第一、第二の各含浸ワニスの粘度を変
えて製造したプリプレグの特性を評価したところ、表１
のようになった。By the way, when we evaluated the characteristics of prepregs manufactured by changing the viscosity of the first and second impregnation varnishes, Table 1
It became like this.
表 １
大息のプリプレグ！ｆ （＋ｉ ＪｆＩ Ｉ Ｉ中、Δ
はやや不良、０は良好、◎は非常に良好、をそれぞれ示
す。Table 1 Prepreg with a big breath! f (+i JfI I I, Δ
indicates slightly poor, 0 indicates good, and ◎ indicates very good.
（発明の効果）
以にのように、この発明によれば、織布に対するワニス
の含浸工程と乾燥−１−程を二段階に分けて行い、第一
段階で付着させるワニスの厚さと、その乾燥度を調整す
るようにしたので、平滑な表面を持ち、かつ気泡のない
プリプレグを得ることができる。(Effects of the Invention) As described above, according to the present invention, the process of impregnating the woven fabric with varnish and the drying step (1) are performed in two stages, and the thickness of the varnish to be applied in the first stage and its Since the degree of dryness is adjusted, a prepreg with a smooth surface and no bubbles can be obtained.
第１図はこの発明の実り’ｈ例によるプリプレグの製造
法を実ｊＭするのに使用するプリプレグ製造装置の断面
図、第２図は従来のプリプレグの製造法を実施するのに
使用するプリプレグ製造装置の断面図である。
１は織布、２はアキュムレータ、３はブレ含浸ロール、
４ａはブレ含浸層、５ａはプレ含浸ワニス、５ｂは第一
次含浸ワニス、５ｃは第二次含浸ワニス、６ａは第一次
ギャップロール、６ｂは第二次ギャップロール、７ａは
第一次乾燥炉、７ｂは第二次乾燥炉、８ａ、８ｂは第一
次冷却ロール、９ａ、９ｂは第二次冷却ロール、１０は
プリプレグロールである。
なお、図中、同一符号は同一または相当部分を示す。Fig. 1 is a sectional view of a prepreg manufacturing apparatus used to carry out a prepreg manufacturing method according to an example of the present invention, and Fig. 2 is a prepreg manufacturing apparatus used to carry out a conventional prepreg manufacturing method. FIG. 2 is a cross-sectional view of the device. 1 is a woven fabric, 2 is an accumulator, 3 is a blur impregnation roll,
4a is a blur impregnated layer, 5a is a pre-impregnated varnish, 5b is a primary impregnated varnish, 5c is a secondary impregnated varnish, 6a is a primary gap roll, 6b is a secondary gap roll, 7a is a primary dryer The furnace, 7b is a secondary drying furnace, 8a and 8b are primary cooling rolls, 9a and 9b are secondary cooling rolls, and 10 is a prepreg roll. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
るに際し、第一段階として、織布にその厚さの１．０〜
１．５倍の厚さのワニスを付着させて、その中の溶剤量
が樹脂固形分に対し５．０〜３０％になるまで乾燥させ
、第二段階として、前記乾燥させたワニスの上に所定の
厚さになるまでワニスを付着させて乾燥させることを特
徴とするプリプレグの製造法。After impregnating a woven fabric with varnish, the first step is to dry the varnish to a thickness of 1.0 to 100%.
A 1.5 times thicker varnish is applied and dried until the amount of solvent in it becomes 5.0 to 30% based on the resin solid content, and as a second step, a varnish is applied on top of the dried varnish. A prepreg manufacturing method characterized by applying varnish to a predetermined thickness and drying it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11378688A JPH01283113A (en) | 1988-05-11 | 1988-05-11 | Manufacture of prepreg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11378688A JPH01283113A (en) | 1988-05-11 | 1988-05-11 | Manufacture of prepreg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01283113A true JPH01283113A (en) | 1989-11-14 |
Family
ID=14621060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11378688A Pending JPH01283113A (en) | 1988-05-11 | 1988-05-11 | Manufacture of prepreg |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01283113A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04185404A (en) * | 1990-11-20 | 1992-07-02 | Hitachi Chem Co Ltd | Manufacture of thermosetting resin prepreg |
| US5728623A (en) * | 1994-03-16 | 1998-03-17 | Nec Corporation | Method of bonding a III-V group compound semiconductor layer on a silicon substrate |
-
1988
- 1988-05-11 JP JP11378688A patent/JPH01283113A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04185404A (en) * | 1990-11-20 | 1992-07-02 | Hitachi Chem Co Ltd | Manufacture of thermosetting resin prepreg |
| US5728623A (en) * | 1994-03-16 | 1998-03-17 | Nec Corporation | Method of bonding a III-V group compound semiconductor layer on a silicon substrate |
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