JPH0716934A - Production of prepreg - Google Patents
Production of prepregInfo
- Publication number
- JPH0716934A JPH0716934A JP5152446A JP15244693A JPH0716934A JP H0716934 A JPH0716934 A JP H0716934A JP 5152446 A JP5152446 A JP 5152446A JP 15244693 A JP15244693 A JP 15244693A JP H0716934 A JPH0716934 A JP H0716934A
- Authority
- JP
- Japan
- Prior art keywords
- impregnation tank
- resin liquid
- resin
- prepreg
- base material
- 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
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/022—Processes for manufacturing precursors of printed circuits, i.e. copper-clad substrates
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は含浸槽内で樹脂液を基材
に含浸し、樹脂を半硬化させるプリプレグの製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a prepreg in which a resin liquid is impregnated into a base material in an impregnation tank to semi-cure the resin.
【０００２】[0002]
【従来の技術】電子機器、電気機器に利用されるプリン
ト配線板の材料として、樹脂が半硬化したプリプレグが
用いられる。このプリプレグは、含浸槽にエポキシ樹脂
等で構成される樹脂液を満たし、この樹脂液をガラス布
等の基材に含浸し、加熱により含浸した樹脂液中の樹脂
を半硬化して製造される。従来のプリプレグの製造にあ
っては、プリプレグの残留気泡が問題となっている。こ
の残留気泡は、樹脂液中に存在するエアーが、含浸の際
に基材に取り込まれ、プリプレグ内に残留する。上記残
留気泡は、上記プリプレグを用いてプリント配線板を作
製する際に、加熱及び加圧しても、気泡が除去されずプ
リント配線板内に残り、ボイドとなる。このボイドは絶
縁性、耐熱性の劣化の原因となる。近年、成形条件は圧
力を低圧で成形する傾向があり、上記ボイドが発生し易
くなっている。従って、残留気泡のないプリプレグが求
められている。2. Description of the Related Art A semi-cured resin prepreg is used as a material for a printed wiring board used in electronic equipment and electric equipment. This prepreg is manufactured by filling an impregnation tank with a resin liquid composed of epoxy resin, impregnating this resin liquid into a base material such as glass cloth, and semi-curing the resin in the impregnated resin liquid by heating. . In the manufacture of conventional prepreg, residual air bubbles in the prepreg pose a problem. The residual air bubbles are taken into the base material during the impregnation of the air present in the resin liquid and remain in the prepreg. The residual bubbles remain in the printed wiring board without being removed even when heated and pressed when a printed wiring board is manufactured using the prepreg, and become voids. This void causes deterioration of insulation and heat resistance. In recent years, the molding conditions tend to form at a low pressure, and the above voids are likely to occur. Therefore, there is a demand for a prepreg free of residual bubbles.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記事実に鑑
みてなされたもので、その目的とするところは、残留気
泡が少ないプリプレグの製造方法を提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and an object of the present invention is to provide a method for producing a prepreg having a small amount of residual bubbles.
【０００４】[0004]
【課題を解決するための手段】本発明のプリプレグの製
造方法は、含浸槽内で樹脂液を基材に含浸し、この樹脂
液中の樹脂を半硬化させるプリプレグの製造方法におい
て、上記含浸槽内の樹脂液に超音波振動を与えることを
特徴とする。A method for producing a prepreg according to the present invention is a method for producing a prepreg in which a base material is impregnated with a resin solution in an impregnation tank and the resin in the resin solution is semi-cured. It is characterized in that ultrasonic vibration is applied to the resin liquid inside.
【０００５】[0005]
【作用】本発明においては、含浸槽内の樹脂液に超音波
振動を与えるので、この超音波振動により、含浸槽内の
樹脂液の内部に存在するエアーを樹脂液の外に放出し、
エアーの殆どない樹脂液を基材に含浸することができ
る。In the present invention, since ultrasonic vibration is applied to the resin liquid in the impregnation tank, this ultrasonic vibration releases the air existing inside the resin liquid in the impregnation tank to the outside of the resin liquid,
The base material can be impregnated with a resin liquid containing almost no air.
【０００６】以下、本発明に係るプリプレグの製造方法
を図面を参照しながら説明する。図１は本発明の一実施
例に係る製造方法を用いた含浸装置の要部正面図であ
る。A method of manufacturing a prepreg according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a main part of an impregnating apparatus using a manufacturing method according to an embodiment of the present invention.
【０００７】本発明の対象であるプリプレグは、基材
（７）に樹脂液（１）を含浸し、半硬化して得られる。
上記基材（７）としては、例えばガラス、アスベスト等
の無機繊維やポエリエステル、ポリアミド、ポリビニル
アルコール、アクリル等の有機合成繊維や木綿等の天然
繊維からなる織布、不織布、マット或いは紙又はこれら
を組み合わせた基材が用いられる。上記樹脂液（１）を
構成する樹脂としては、例えばエポキシ樹脂、ポリイミ
ド樹脂、不飽和ポリエステル樹脂、フェノール樹脂、メ
ラミン樹脂、フッ素樹脂等の単独、変成物、混合物等が
挙げられる。また、樹脂液（１）は、アセトン、メチル
アルコール、水等の溶剤、硬化剤、充填剤等が必要に応
じて適宜添加されている。The prepreg which is the object of the present invention is obtained by impregnating the base material (7) with the resin liquid (1) and semi-curing.
Examples of the base material (7) include woven fabrics, non-woven fabrics, mats or papers made of inorganic fibers such as glass and asbestos, organic synthetic fibers such as polyester, polyamide, polyvinyl alcohol and acrylic, and natural fibers such as cotton and the like. A combination of substrates is used. Examples of the resin constituting the resin liquid (1) include epoxy resin, polyimide resin, unsaturated polyester resin, phenol resin, melamine resin, fluororesin, etc., alone, modified products, and mixtures. Further, the resin liquid (1) is appropriately added with a solvent such as acetone, methyl alcohol, water, etc., a curing agent, a filler, etc., if necessary.
【０００８】本発明を用いた含浸装置の一例は、図１に
示す如く、含浸槽（２）を備え、この含浸槽（２）は、
樹脂液（１）が満たされ、連続して供給される基材
（７）に上記樹脂液（１）を含浸させるものである。上
記含浸装置は、樹脂液（１）が満たされた含浸槽（２）
内に、基材（７）を樹脂液（１）内に導く浸漬ロール
（６）を備え、上記樹脂液（１）の液面上には、樹脂液
（１）の含浸量をコントロールする２本のロール（５）
（５）を備える。上記含浸槽（２）の外側に、この含浸
槽（２）に接して超音波振動体（３）が設けられ、この
超音波振動体（３）は外部の発信機（４）と電気回路で
接続されており、外部からの電気エネルギーを機械的振
動に変換することにより、超音波の振動を発生する。An example of the impregnation apparatus using the present invention is provided with an impregnation tank (2) as shown in FIG.
The base material (7) filled with the resin liquid (1) and continuously supplied is impregnated with the resin liquid (1). The impregnating device is provided with an impregnation tank (2) filled with the resin liquid (1).
A dipping roll (6) for guiding the substrate (7) into the resin liquid (1) is provided therein, and the impregnation amount of the resin liquid (1) is controlled on the liquid surface of the resin liquid (1). Book rolls (5)
(5) is provided. An ultrasonic vibrator (3) is provided outside the impregnation tank (2) in contact with the impregnation tank (2), and the ultrasonic vibrator (3) is connected to an external transmitter (4) and an electric circuit. They are connected and generate ultrasonic vibration by converting electric energy from the outside into mechanical vibration.
【０００９】上記含浸装置を用いたプリプレグ製造方法
について説明する。樹脂液（１）が満たされた含浸槽
（２）に、基材（７）が連続的に供給され、上記基材
（７）は樹脂液（１）内の浸漬ロール（６）を通過しな
がら、樹脂液（１）を含浸する。本発明においては、上
記発信機（４）からの信号により電気回路で接続された
超音波振動体（３）で電気エネルギーを、例えば２０〜
４０ＫＨＺの超音波の振動に変換すると、この超音波振
動体（３）に接する含浸槽（２）が細かな周期の振動を
起こし、この含浸槽（２）内の樹脂液（１）に超音波振
動が与えられる。この超音波振動により、含浸槽（２）
内の樹脂液（１）の内部に存在するエアーを樹脂液
（１）の外に放出し、エアーの殆どない樹脂液（１）が
基材（７）に含浸される。樹脂液（１）を含浸した基材
（７）は、樹脂液面上に設けられた２本のロール（５）
（５）の間を通過しすることにより含浸量がコントロー
ルされ、その後、乾燥されて樹脂液（１）中の樹脂が半
硬化したプリプレグとなる。上述の如く、樹脂液（１）
中にエアーがないので残留気泡が殆どないプリプレグが
得られる。上記含浸槽を超音波で振動させる方法は含浸
槽（２）内の樹脂液（１）に均一に超音波振動を付与で
きる点で有用である。A method of manufacturing a prepreg using the above impregnating device will be described. A base material (7) is continuously supplied to an impregnation tank (2) filled with the resin liquid (1), and the base material (7) passes through a dipping roll (6) in the resin liquid (1). While impregnating the resin liquid (1). In the present invention, the ultrasonic vibrator (3) connected by an electric circuit according to a signal from the transmitter (4) supplies electric energy, for example, 20 to
When converted into ultrasonic vibration of 40 KHZ, the impregnation tank (2) in contact with the ultrasonic vibrating body (3) vibrates in a fine cycle, and ultrasonic waves are applied to the resin liquid (1) in the impregnation tank (2). Vibration is given. By this ultrasonic vibration, the impregnation tank (2)
The air existing inside the resin liquid (1) therein is discharged to the outside of the resin liquid (1), and the base material (7) is impregnated with the resin liquid (1) having almost no air. The base material (7) impregnated with the resin liquid (1) has two rolls (5) provided on the resin liquid surface.
The amount of impregnation is controlled by passing through between (5) and then dried to obtain a semi-cured prepreg of the resin in the resin liquid (1). As mentioned above, the resin liquid (1)
Since there is no air inside, a prepreg with almost no residual bubbles can be obtained. The method of vibrating the impregnation tank with ultrasonic waves is useful in that the ultrasonic vibration can be uniformly applied to the resin liquid (1) in the impregnation tank (2).
【００１０】本発明の製造方法はこの実施例に限定され
ず、例えば、超音波を直接樹脂液に与える方法等が挙げ
られる。The manufacturing method of the present invention is not limited to this embodiment, and examples thereof include a method of directly applying ultrasonic waves to the resin liquid.
【００１１】[0011]
実施例１ 図１に示す含浸装置を用い、樹脂にエポキシ樹脂を用い
た樹脂液（１）を含浸槽（２）に満たした。発信機
（４）からの信号で超音波振動体（３）が４０ＫＨＺの
超音波振動をすると、上記含浸槽（２）が細かい周期の
振動を起こし、樹脂液（１）に超音波振動が付与され
た。Example 1 The impregnation tank (2) was filled with a resin liquid (1) using an epoxy resin as a resin, using the impregnation apparatus shown in FIG. When the ultrasonic vibrating body (3) vibrates ultrasonically at 40 KHZ by the signal from the transmitter (4), the impregnation tank (2) vibrates in a fine cycle, and ultrasonic vibration is imparted to the resin liquid (1). Was done.
【００１２】次に、基材（７）として、厚さ０．１８ｍ
ｍのガラス布を用いた。このガラス布を浸漬ロール
（６）および含浸量が５０％となるようロール間の間隔
をコントロールしたロール（５）を通過させ、所望の樹
脂液（１）をガラス布に含浸した後に、乾燥させて樹脂
が半硬化したプリプレグを得た。Next, as a base material (7), a thickness of 0.18 m
m glass cloth was used. This glass cloth is passed through a dipping roll (6) and a roll (5) in which the interval between the rolls is controlled so that the impregnation amount is 50%, the glass cloth is impregnated with the desired resin liquid (1), and then dried. A prepreg in which the resin was semi-cured was obtained.
【００１３】得たプリプレグを２５×２５ｍｍに切断
し、拡大鏡で外観を目視検査して、残留気泡の数を測定
した。残留気泡は３個であった。The prepreg thus obtained was cut into 25 × 25 mm pieces, and the appearance was visually inspected with a magnifying glass to measure the number of residual bubbles. The number of residual bubbles was three.
【００１４】比較例１ 実施例１に用いたと同種の樹脂液、及び基材を用いてプ
リプレグを得た。樹脂液には超音波振動を与えなかっ
た。Comparative Example 1 A prepreg was obtained by using the same resin solution and the same base material as those used in Example 1. No ultrasonic vibration was applied to the resin liquid.
【００１５】得たプリプレグを２５×２５ｍｍに切断
し、拡大鏡で外観を目視検査して、残留気泡の数を測定
した。残留気泡は８０個であった。The prepreg thus obtained was cut into 25 × 25 mm pieces, and the appearance was visually inspected with a magnifying glass to measure the number of residual bubbles. The number of residual bubbles was 80.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【発明の効果】本発明の製造方法によって、残留気泡の
殆どないプリプレグが得られる。本発明によって得られ
るプリプレグを用いて作製されるプリント配線板は、ボ
イドが発生しないので、ボイドによる絶縁性、耐熱性の
劣化を防ぐことができる。According to the manufacturing method of the present invention, a prepreg having almost no residual bubbles can be obtained. Since the printed wiring board produced by using the prepreg obtained by the present invention does not have voids, it is possible to prevent the insulation and heat resistance from being deteriorated by the voids.
【図１】本発明の一実施例に係る製造方法を用いた含浸
装置の要部正面図である。FIG. 1 is a front view of a main part of an impregnating apparatus using a manufacturing method according to an embodiment of the present invention.
１ 樹脂液 ２ 含浸槽 ３ 超音波振動体 ４ 発信機 ５ ロール ６ 浸漬ロール ７ 基材 1 Resin Liquid 2 Impregnation Tank 3 Ultrasonic Vibration Body 4 Transmitter 5 Roll 6 Immersion Roll 7 Base Material
Claims (2)
樹脂液中の樹脂を半硬化させるプリプレグの製造方法に
おいて、上記含浸槽内の樹脂液に超音波振動を与えるこ
とを特徴とするプリプレグの製造方法。1. A method for producing a prepreg in which a base material is impregnated with a resin liquid in an impregnation tank and the resin in the resin liquid is semi-cured, wherein ultrasonic vibration is applied to the resin liquid in the impregnation tank. And a method of manufacturing a prepreg.
より、この含浸槽内の樹脂液に超音波振動を与えること
を特徴とする請求項１のプリプレグの製造方法。2. The method of manufacturing a prepreg according to claim 1, wherein the resin liquid in the impregnation tank is subjected to ultrasonic vibration by vibrating the impregnation tank with ultrasonic waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5152446A JPH0716934A (en) | 1993-06-23 | 1993-06-23 | Production of prepreg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5152446A JPH0716934A (en) | 1993-06-23 | 1993-06-23 | Production of prepreg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0716934A true JPH0716934A (en) | 1995-01-20 |
Family
ID=15540706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5152446A Pending JPH0716934A (en) | 1993-06-23 | 1993-06-23 | Production of prepreg |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716934A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044753A1 (en) * | 1998-03-05 | 1999-09-10 | Solipat Ag | Method and device for applying a two-component impregnating or coating agent to a substrate |
-
1993
- 1993-06-23 JP JP5152446A patent/JPH0716934A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044753A1 (en) * | 1998-03-05 | 1999-09-10 | Solipat Ag | Method and device for applying a two-component impregnating or coating agent to a substrate |
| EP0947253A2 (en) * | 1998-03-05 | 1999-10-06 | Solipat Ag | Process and apparatus for coating or impregnating a substrate with a two-components composition |
| EP0947253A3 (en) * | 1998-03-05 | 1999-10-13 | Solipat Ag | Process and apparatus for coating or impregnating a substrate with a two-components composition |
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