JPH11188728A - Method and apparatus for impregnating woven fabric base material with varnish - Google Patents

Method and apparatus for impregnating woven fabric base material with varnish

Info

Publication number
JPH11188728A
JPH11188728A JP35850997A JP35850997A JPH11188728A JP H11188728 A JPH11188728 A JP H11188728A JP 35850997 A JP35850997 A JP 35850997A JP 35850997 A JP35850997 A JP 35850997A JP H11188728 A JPH11188728 A JP H11188728A
Authority
JP
Japan
Prior art keywords
varnish
woven fabric
base material
roll
fabric substrate
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
Application number
JP35850997A
Other languages
Japanese (ja)
Inventor
Masanori Iizuka
正則 飯塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Denko Materials Co Ltd
Original Assignee
Hitachi Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Chemical Co Ltd filed Critical Hitachi Chemical Co Ltd
Priority to JP35850997A priority Critical patent/JPH11188728A/en
Publication of JPH11188728A publication Critical patent/JPH11188728A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for impregnating a woven fabric base material with varnish capable of reducing voids of a prepreg using the fabric base material. SOLUTION: A varnish impregnating apparatus equipped with a supply roll 1 of a woven fabric base material 10, a guide roll 2 for guiding the woven fabric base material to a varnish impregnation tank 4, an impregnation roll 3, the varnish impregnation tank 4 and a varnish adhesion amt. control unit 5 and allowing the base material 10 to run to the varnish adhesion amt. control unit 5 from the supply roll 1 through the varnish impregnation tank 4, a roll 6 for meandering the base material 10 so as to loosen the flocculation fibers is arranged between the supply roll and the guide roll 2.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、織布基材へのワニ
ス含浸方法及びワニス含浸装置に関するものである。
The present invention relates to a method and an apparatus for impregnating a woven fabric substrate with varnish.

【0002】[0002]

【従来の技術】電気用積層板、例えば、銅張積層板は、
熱硬化性樹脂のワニスを繊維基材に含浸、乾燥してプリ
プレグとし、このプリプレグを所定枚数重ね、その両面
又は片面に銅はくを配し、加熱加圧して製造されてい
る。ここで使用されている繊維基材としては、紙基材や
不織布基材のように繊維がランダムかつルーズになって
いるものと、織布基材のように繊維が引き揃えられて撚
りをかけられるなどして凝集しているものとがある。プ
リプレグの製造工程において、繊維基材へのワニス含浸
工程は最も重要な工程とされている。従来は、連続帯状
の繊維基材20を供給ロール1からガイドロール2及び
含浸ロール3によりワニス含浸槽4に導き、繊維基材2
0を含浸槽4内のワニスに浸漬することにより繊維基材
20にワニスを含浸させ、ワニス付着量制御装置5によ
り過剰のワニスを除去して付着量を適正に制御するよう
にしていた(図2参照)。
2. Description of the Related Art Electric laminates, for example, copper clad laminates,
The fiber base material is impregnated with a varnish of a thermosetting resin and dried to form a prepreg. A predetermined number of the prepregs are stacked, copper foil is arranged on both surfaces or one surface thereof, and the prepreg is manufactured by heating and pressing. The fiber base material used here is one in which the fibers are random and loose, such as a paper base material or a nonwoven fabric base, and the other, in which the fibers are aligned and twisted, such as a woven base material. Some are agglomerated, for example. In the prepreg manufacturing process, the process of impregnating the fiber base material with varnish is regarded as the most important process. Conventionally, a continuous belt-like fiber base material 20 is guided from a supply roll 1 to a varnish impregnation tank 4 by a guide roll 2 and an impregnation roll 3, and the fiber base material 2
The fiber substrate 20 is impregnated with the varnish by immersing the varnish in the varnish in the impregnation tank 4, and the varnish adhesion amount control device 5 removes the excess varnish to appropriately control the adhesion amount (FIG. 2).

【0003】[0003]

【発明が解決しようとする課題】ワニス含浸工程におい
て肝要なことは、内部に気泡を残さないようにすること
である。元来、繊維基材は繊維間の空隙に空気が含まれ
る構造である。ワニスを含浸するにあたって、この空気
をワニスに置き換える必要がある。ワニスに置き換えら
れずに気泡として残存した空気は、プリプレグとしたと
きもそのまま残存し、いわゆるボイドとなる。ボイドを
多く含むプリプレグを用いて製造した積層板は、電気特
性や耐熱性が悪いことが知られている。したがって、ボ
イドをできるだけ少なくする必要がある。ところが、紙
基材や不織布基材のように繊維がランダムかつルーズで
あるものについては、ワニスが容易に繊維間の空隙に浸
透するためボイドを少なくできるが、織布基材について
は、繊維間の空隙にワニスが浸透しにくく、ボイドを少
なくすることが困難であった。本発明は、織布基材を用
いたプリプレグのボイドを少なくすることができる、織
布基材へのワニス含浸方法及びワニス含浸装置を提供す
るものである。
What is essential in the varnish impregnation step is to prevent air bubbles from remaining inside. Originally, the fiber base material has a structure in which air is contained in the space between the fibers. When impregnating the varnish, it is necessary to replace this air with the varnish. The air remaining as bubbles without being replaced by the varnish remains as it is when prepreg is formed, and becomes a so-called void. It is known that a laminate manufactured using a prepreg containing a large amount of voids has poor electric characteristics and heat resistance. Therefore, it is necessary to minimize voids. However, in the case of fibers having a random and loose fiber such as a paper substrate or a nonwoven fabric substrate, the varnish easily penetrates into the voids between the fibers, thereby reducing voids. The varnish hardly penetrated into the voids, and it was difficult to reduce voids. The present invention provides a method and an apparatus for impregnating a woven fabric substrate with varnish, which can reduce voids in a prepreg using the woven fabric substrate.

【0004】[0004]

【課題を解決するための手段】請求項1に記載の発明
は、織布基材の繊維の凝集をゆるめた後、ワニスを含浸
させることを特徴とする織布基材へのワニス含浸方法で
ある。繊維の凝集をゆるめることによりワニスの浸透性
が向上するので、プリプレグとしたときにボイドを少な
くすることができる。
According to the first aspect of the present invention, there is provided a method for impregnating a woven fabric substrate with a varnish, wherein the varnish is impregnated after loosening the fiber aggregation of the woven fabric substrate. is there. Since the permeability of the varnish is improved by relaxing the aggregation of the fibers, the voids can be reduced when the prepreg is formed.

【0005】繊維の凝集をゆるめる方法としては、手で
揉みほぐすことでも可能であるが、織布基材が連続帯状
に供給されることから、この織布基材を蛇行させること
により繊維の凝集をゆるめる方法が好ましい。すなわ
ち、請求項2に記載の発明は、請求項1に記載のワニス
含浸方法において、織布基材に繊維の凝集をゆるめるよ
うな蛇行をさせるようにしたものである。ここで、繊維
の凝集をゆるめるような蛇行とは、繊維が折り曲げられ
る形となって、繊維を構成するフィラメントまたはフィ
ラメントの収束に微細な破壊が生じるような蛇行であ
る。
[0005] As a method of loosening the cohesion of the fibers, it is possible to loosen the fibers by hand. However, since the woven fabric base material is supplied in a continuous band, the woven fabric base material is meandered to reduce the cohesion of the fibers. A loosening method is preferred. That is, in the invention of claim 2, in the varnish impregnation method of claim 1, the woven fabric substrate is made to meander so as to loosen fiber aggregation. Here, the meandering that loosens the cohesion of the fibers is a meandering in which the fibers are bent so that the filaments constituting the fibers or the convergence of the filaments is minutely broken.

【0006】また、請求項3に記載の発明は、織布基材
10の供給ロール1、織布基材20を含浸槽4に導くガ
イドロール2及び含浸ロール3、ワニス含浸槽4並びに
ワニス付着量制御装置5を備え、織布基材10を、供給
ロール1からワニス含浸槽4を経てワニス付着量制御装
置5に走行させるようにしてなるワニス含浸装置におい
て、供給ロール1とガイドロール2との間に、織布基材
10に繊維の凝集をゆるめるような蛇行をさせるロール
6を配置してなるワニス含浸装置である。
The invention according to claim 3 provides a supply roll 1 for the woven fabric substrate 10, a guide roll 2 and an impregnation roll 3 for guiding the woven fabric substrate 20 to the impregnation tank 4, a varnish impregnation tank 4, and varnish adhesion. In a varnish impregnating device provided with an amount control device 5 and configured to cause the woven fabric substrate 10 to travel from the supply roll 1 to the varnish adhesion amount control device 5 via the varnish impregnation tank 4, a supply roll 1 and a guide roll 2 are provided. A varnish impregnating apparatus in which a roll 6 for meandering loosening of fiber aggregation is disposed on a woven fabric substrate 10 between them.

【0007】[0007]

【発明の実施の形態】本発明で使用される織布基材は、
積層板用途に使用されるものならば、特に制限はなく、
厚さ0.05〜0.3mmのガラス織布基材が一般的で
ある。有機繊維の織布も使用できる。
BEST MODE FOR CARRYING OUT THE INVENTION The woven fabric substrate used in the present invention comprises:
There is no particular limitation as long as it is used for laminated boards.
A woven glass substrate having a thickness of 0.05 to 0.3 mm is generally used. Organic fiber woven fabrics can also be used.

【0008】また、用いられるワニスとしては、一般に
積層板用途に使用される熱硬化性樹脂のワニスであれば
よく、特に制限はない。例えばフェノール樹脂、エポキ
シ樹脂、不飽和ポリエステル樹脂などのワニスが挙げら
れる。ワニスの溶剤も同様であり、例えば、アセトン、
メタノール、メチルエチルケトン、トルエン、エチレン
グリコールモノメチルエーテルなどが使用される。
The varnish to be used is not particularly limited as long as it is a varnish of a thermosetting resin generally used for a laminated board. For example, a varnish such as a phenol resin, an epoxy resin, and an unsaturated polyester resin may be used. The same applies to the varnish solvent, for example, acetone,
Methanol, methyl ethyl ketone, toluene, ethylene glycol monomethyl ether and the like are used.

【0009】織布基材10に繊維の凝集をゆるめるよう
な蛇行をさせるためには、織布基材10をできるだけ小
さい曲率で蛇行させるようにするのが好ましい。このた
め、織布基材10に繊維の凝集をゆるめるような蛇行を
させるロール6としては、直径が10〜30mmのロー
ルを用い、織布基材10が、走行方向を180度反転し
ながら蛇行するように配置するのが好ましい。このと
き、ロールの直径が10mm未満ではロール強度が不足
して、運転中にたわんだりする傾向があり、ロールの直
径が30mmを超えると曲率が大きくなりすぎて、繊維
の凝集をゆるめるような蛇行をさせにくくなる傾向があ
る。織布基材10を蛇行させるためには、ロールをジグ
ザグ状になるようにして配置すればよい。また、織布基
材10を蛇行させるロールの本数は、多いほど効果が大
きくなるが、必要とする本数は織布基材10の厚さや密
度などによって異なり、10〜30本程度の範囲で適宜
選択される。
In order for the woven fabric substrate 10 to meander so as to loosen fiber aggregation, it is preferable that the woven fabric substrate 10 be meandered with a curvature as small as possible. For this reason, a roll having a diameter of 10 to 30 mm is used as the roll 6 that makes the woven fabric substrate 10 meander so as to loosen fiber aggregation, and the woven fabric substrate 10 meanders while reversing the running direction by 180 degrees. It is preferable to arrange them. At this time, if the diameter of the roll is less than 10 mm, the roll strength is insufficient, and the roll tends to bend during operation. If the diameter of the roll exceeds 30 mm, the curvature becomes too large, and the meandering loosens fiber aggregation. Tends to be difficult. In order to meander the woven fabric substrate 10, the rolls may be arranged in a zigzag shape. The effect of the number of rolls meandering the woven fabric substrate 10 increases as the number of rolls increases. However, the required number depends on the thickness and density of the woven fabric substrate 10 and is appropriately set in a range of about 10 to 30. Selected.

【0010】[0010]

【実施例】実施例1 ブロム化ビスフェノールA型エポキシ樹脂(大日本イン
キ化学工業株式会社製、DER−518(商品名)を使
用した)100重量部及びジシアンジアミド3重量部を
エチレングリコールモノメチルエーテル20重量部に溶
解してワニスとした。このワニスの30℃における粘度
は100mPa・sであった。供給ロール1とガイドロ
ール2とに間に、直径が20mmのロールを20本、織
布基材の走行方向が180度反転して蛇行するように配
置して、織布基材を蛇行させるロール6を構成した。こ
のワニス含浸装置により、前記で得られたワニスをNE
MA7628タイプのガラス織布基材に、ワニスの付着
量が固形分換算で45重量%となるよう調整して含浸
し、加熱乾燥してプリプレグを作製した。なお、織布基
材のワニス浸漬時間は0.2分、織布基材の走行速度は
3m/分、乾燥機設定温度170℃、乾燥機通過時間1
0分とした。
Example 1 100 parts by weight of a brominated bisphenol A type epoxy resin (DER-518 (trade name) manufactured by Dainippon Ink and Chemicals, Inc.) and 3 parts by weight of dicyandiamide were mixed with 20 parts by weight of ethylene glycol monomethyl ether. Was dissolved in the mixture to give a varnish. The viscosity at 30 ° C. of the varnish was 100 mPa · s. Twenty rolls having a diameter of 20 mm are arranged between the supply roll 1 and the guide roll 2 so that the running direction of the woven fabric substrate is reversed by 180 degrees and meanders, and the woven fabric substrate is meandered. No. 6 was constructed. The varnish impregnated with the varnish is NE
A glass woven fabric substrate of MA7628 type was impregnated with the amount of varnish adjusted to be 45% by weight in terms of solid content, and dried by heating to prepare a prepreg. The varnish immersion time of the woven fabric substrate was 0.2 minutes, the running speed of the woven fabric substrate was 3 m / min, the dryer set temperature was 170 ° C., and the dryer passage time was 1
0 minutes.

【0011】得られたプリプレグについて、画像処理装
置によりボイドの面積比率を求めたところ、20%であ
った。
With respect to the obtained prepreg, the area ratio of voids was determined by an image processing apparatus and found to be 20%.

【0012】比較例 織布基材を蛇行させるロールを通過させないようにした
ほかは、実施例1と同様にしてプリプレグを作製した。
Comparative Example A prepreg was prepared in the same manner as in Example 1 except that the woven fabric substrate was not passed through a meandering roll.

【0013】得られたプリプレグについて、画像処理装
置によりボイドの面積比率を求めたところ、27%であ
った。
With respect to the obtained prepreg, the void area ratio was determined by an image processing apparatus and found to be 27%.

【0014】[0014]

【発明の効果】本発明によれば、プリプレグのボイドを
少なくすることができ、積層板にした際に電気特性や耐
熱性に優れた製品を得ることができる。
According to the present invention, the voids of the prepreg can be reduced, and a product having excellent electrical properties and heat resistance when formed into a laminate can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のー実施例になるワニス含浸装置の概略
断面図である。
FIG. 1 is a schematic sectional view of a varnish impregnating apparatus according to an embodiment of the present invention.

【図2】従来のワニス含浸装置の概略断面図である。FIG. 2 is a schematic sectional view of a conventional varnish impregnating apparatus.

【符号の説明】[Explanation of symbols]

1 供給ロール 2 ガイドロール 3 含浸ロール 4 ワニス含浸槽 5 ワニス付着量制御装置 6 織布基材を蛇行させるロール 10 織布基材 20 繊維基材 REFERENCE SIGNS LIST 1 supply roll 2 guide roll 3 impregnation roll 4 varnish impregnation tank 5 varnish adhesion amount control device 6 roll for meandering woven base material 10 woven base material 20 fiber base material

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 織布基材の繊維の凝集をゆるめた後、ワ
ニスを含浸させることを特徴とする織布基材へのワニス
含浸方法。
1. A method of impregnating a woven fabric base material with varnish, wherein the varnish is impregnated after loosening the aggregation of the fibers of the woven fabric base material.
【請求項2】 織布基材に繊維の凝集をゆるめるような
蛇行をさせるようにした請求項1に記載の織布基材への
ワニス含浸方法。
2. The method for impregnating a woven fabric substrate with varnish according to claim 1, wherein the woven fabric substrate is made to meander so as to loosen fiber aggregation.
【請求項3】 織布基材の供給ロール、織布基材を含浸
槽に導くガイドロール及び含浸ロール、ワニス含浸槽並
びにワニス付着量制御装置を備え、織布基材を、供給ロ
ールからワニス含浸槽を経てワニス付着量制御装置に走
行させるようにしてなるワニス含浸装置において、供給
ロールとガイドロールとの間に、織布基材に繊維の凝集
をゆるめるような蛇行をさせるロールを配置してなるワ
ニス含浸装置。
3. A supply roll for supplying a woven fabric substrate, a guide roll and an impregnation roll for guiding the woven fabric substrate to an impregnation tank, a varnish impregnation tank, and a varnish adhesion amount control device. In a varnish impregnating apparatus configured to travel to a varnish adhesion amount control device through an impregnation tank, a roll that makes meandering to loosen fiber aggregation on a woven fabric substrate is disposed between a supply roll and a guide roll. Varnish impregnation equipment.
JP35850997A 1997-12-25 1997-12-25 Method and apparatus for impregnating woven fabric base material with varnish Pending JPH11188728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35850997A JPH11188728A (en) 1997-12-25 1997-12-25 Method and apparatus for impregnating woven fabric base material with varnish

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35850997A JPH11188728A (en) 1997-12-25 1997-12-25 Method and apparatus for impregnating woven fabric base material with varnish

Publications (1)

Publication Number Publication Date
JPH11188728A true JPH11188728A (en) 1999-07-13

Family

ID=18459690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35850997A Pending JPH11188728A (en) 1997-12-25 1997-12-25 Method and apparatus for impregnating woven fabric base material with varnish

Country Status (1)

Country Link
JP (1) JPH11188728A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023058690A1 (en) * 2021-10-08 2023-04-13
WO2023090272A1 (en) * 2021-11-18 2023-05-25 旭化成株式会社 Glass cloth, glass cloth production method, prepreg, and printed wiring board

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023058690A1 (en) * 2021-10-08 2023-04-13
WO2023058690A1 (en) * 2021-10-08 2023-04-13 旭化成株式会社 Glass cloth, prepreg and printed wiring board
TWI820954B (en) * 2021-10-08 2023-11-01 日商旭化成股份有限公司 Glass cloth, prepreg, printed wiring board, integrated circuit, and electronic equipment
WO2023090272A1 (en) * 2021-11-18 2023-05-25 旭化成株式会社 Glass cloth, glass cloth production method, prepreg, and printed wiring board
JP7305070B1 (en) * 2021-11-18 2023-07-07 旭化成株式会社 Glass cloth, method for manufacturing glass cloth, prepreg, printed wiring board

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