JPH01104629A - Production of prepreg - Google Patents
Production of prepregInfo
- Publication number
- JPH01104629A JPH01104629A JP26247987A JP26247987A JPH01104629A JP H01104629 A JPH01104629 A JP H01104629A JP 26247987 A JP26247987 A JP 26247987A JP 26247987 A JP26247987 A JP 26247987A JP H01104629 A JPH01104629 A JP H01104629A
- Authority
- JP
- Japan
- Prior art keywords
- impregnation
- varnish
- prepreg
- viscosity
- impregnating
- 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 description 12
- 238000005470 impregnation Methods 0.000 claims abstract description 104
- 239000002966 varnish Substances 0.000 claims abstract description 79
- 238000000034 method Methods 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000007598 dipping method Methods 0.000 claims description 23
- 238000007654 immersion Methods 0.000 abstract description 12
- 239000000758 substrate Substances 0.000 abstract description 9
- 238000010292 electrical insulation Methods 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 238000001035 drying Methods 0.000 description 10
- 239000000123 paper Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000007605 air drying Methods 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- -1 curing accelerator Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
この発明は、電気絶縁板用材料等として用いられるプリ
プレグの製法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for producing prepreg used as a material for electrically insulating boards and the like.
液状に調製された樹脂（ワニス）の基材への含浸方法と
しては、基材をワニス中に浸漬して行う浸漬法、ロール
を用いてロールから間接的に基材にワニスを含浸させる
スクイ文法および接触（キツス）法、基材をワニス中に
浸漬した後さらにスクイズすることにより行う浸漬・ス
クイズ法等が一般的であるが、より均一に、気泡等を含
むことなくワニスを含浸させるため、それらの方法を組
み合わせて複数回含浸させるようにすることが行われて
いる。Methods for impregnating a base material with resin (varnish) prepared in liquid form include a dipping method in which the base material is immersed in the varnish, and a scoop method in which the base material is indirectly impregnated with varnish from a roll using a roll. The contact method and the dipping/squeezing method, which involves dipping the base material in varnish and then squeezing it, are common. A combination of these methods has been used to impregnate the material multiple times.
さらに、その際、粘度の異なる２種のワニスを使用する
ようにして、含浸性をより一層向上させるようにするこ
とも有用な方法として行われている。その際、たとえば
、まず低粘度のワニスをキツス法により片面から含浸さ
せ、ついで含浸・スクイズ法により高粘度のワニスを含
浸させる、という方法が一般的に採られている。Furthermore, in this case, it is also a useful method to use two types of varnishes with different viscosities to further improve impregnating properties. In this case, for example, a method generally employed is to first impregnate one side with a low-viscosity varnish by the kitsu method, and then impregnate a high-viscosity varnish by the impregnation/squeeze method.
しかし、上記の方法においては、前処理としての低粘度
のワニスによる一次合浸がキツス法により行われている
ため、片面から空気を税泡しつつ含浸させることができ
るという利点はあるが、他方、基材の濡れが充分に行わ
れないという欠点があり、そのため、続く二次含浸が行
われる際のワニスの含浸性が劣り、粘度の異なる２種の
ワニスが基材上で充分に均一化されず、基材の流れ方向
にスジ状の含浸ムラが発生し易いという問題点が残され
ている。However, in the above method, the primary co-immersion with a low-viscosity varnish as a pretreatment is performed by the Kitsus method, which has the advantage of being able to impregnate from one side while creating air bubbles, but the other side , the disadvantage is that the substrate is not sufficiently wetted, and therefore the impregnating properties of the varnish are poor when the subsequent secondary impregnation is performed, and two types of varnish with different viscosities are not sufficiently homogenized on the substrate. However, the problem remains that streak-like impregnation unevenness tends to occur in the flow direction of the base material.
このような事情に鑑み、この発明は、含浸ムラ等が起こ
らぬようにワニスの含浸性を高め、電気絶縁性、耐湿性
等に優れた品質の良いプリプレグの製法を提供すること
を目的とする。In view of these circumstances, an object of the present invention is to provide a method for producing a high-quality prepreg with excellent electrical insulation, moisture resistance, etc., by increasing the impregnating property of varnish so as to prevent uneven impregnation, etc. .
上記目的を達成するため、この発明は、低粘度の一次含
浸用ワニスが含浸された基材に、前記−次含浸用ワニス
よりも高粘度の二次含浸用ワニスを含浸させてプリプレ
グを得るにあたり、前記−次含浸用ワニスの含浸が浸漬
を伴う含浸法によりなされており、前記二次含浸用ワニ
スの含浸がキツス法および浸漬を伴う含浸法により複数
回なされていることを特徴とするプリプレグの製法を要
旨とする。In order to achieve the above object, the present invention impregnates a base material impregnated with a low viscosity varnish for primary impregnation with a varnish for secondary impregnation having a higher viscosity than the varnish for secondary impregnation to obtain a prepreg. , wherein the impregnation with the varnish for secondary impregnation is carried out by an impregnation method involving immersion, and the impregnation with the varnish for secondary impregnation is carried out multiple times by the Kitsu method and the impregnation method involving immersion. The gist is the manufacturing method.
以下に、この発明を、その一実施例および従来例をあら
れす図面を参照しつつ詳しく説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings, including an embodiment thereof and a conventional example.
第２図は、従来のプリプレグの製法における含浸法の一
例を模式的にあられしている。この含浸装置は、−次含
浸槽１および二次含浸槽２を有し、−次含浸槽１内には
低粘度の一次含浸用ワニスＡが、二次含浸槽２内にはこ
のワニスＡよりも高粘度の二次含浸用ワニスＢがそれぞ
れ供給されている。FIG. 2 schematically shows an example of an impregnation method in a conventional prepreg manufacturing method. This impregnation device has a secondary impregnation tank 1 and a secondary impregnation tank 2, in which a low viscosity varnish A for primary impregnation is placed in the secondary impregnation tank 1, and a varnish A for primary impregnation in the secondary impregnation tank 2. Varnish B for secondary impregnation with high viscosity is also supplied.
図面左方から給送手段を通して送られる基材Ｘは、まず
、−次含浸槽ｌ内でキツスロール３上に導かれ、そこを
走る間に一次含浸用ワニスＡが含浸される（キツス法）
。ついで、基材Ｘはガイドロール４を経て二次含浸槽２
に送られ、まず、二次含浸用ワニスＢ中に浸漬される。The base material X fed through the feeding means from the left side of the drawing is first guided onto the Kitsusu roll 3 in the secondary impregnation tank 1, and is impregnated with the primary impregnation varnish A while running there (Kitusu method).
. Next, the base material X passes through the guide roll 4 and enters the secondary impregnation tank 2.
and is first dipped in varnish B for secondary impregnation.
続いてスクイズロール５の間に通されてスクイズされる
（浸漬・スクイズ法）。Subsequently, it is passed between squeeze rolls 5 and squeezed (dipping/squeezing method).
このような従来の含浸装置に対し、この発明の一実施例
において使用される第１図の含浸装置は、低粘度の一次
含浸用ワニスＡが供給された一次含浸槽１および高粘度
の二次含浸用ワニスＢが供給された複数個（薗において
は３個）の二次含浸槽２を有している。−次含浸槽１お
よび二次含浸槽２の最後の１槽は、それぞれ−組のスク
イズロール５を備えた浸漬含浸槽であり、基材Ｘが、そ
れらのスクイズロール５によるスクイズを受ける前に、
ガイドロール４に導かれていったんワニス中に浸漬され
るように構成されている。二次含浸槽２のうちの最初の
２槽は、基材Ｘが浸漬を受けることのない接触含浸槽で
あって、それぞれキツスロール３を備えている。さらに
、２番目の二次含浸槽２におけるキツスロール３は、押
えロール６と組合わされていて、絞りキツス法による含
浸が行われるようになっている。この押えロール６は、
キツスロール３とのクリアランス制御が可能であるよう
に配設されており、通常は、基材の厚さないし基材の厚
さの２倍程度のクリアランスで絞り込みながらキツス含
浸が行われる。In contrast to such a conventional impregnating apparatus, the impregnating apparatus shown in FIG. It has a plurality of (three in Sono) secondary impregnation tanks 2 to which impregnation varnish B is supplied. - The last one of the secondary impregnation tank 1 and the secondary impregnation tank 2 is an immersion impregnation tank each equipped with a set of squeeze rolls 5, in which the substrate X is squeezed by the squeeze rolls 5. ,
It is constructed so that it is guided by a guide roll 4 and is once immersed in the varnish. The first two of the secondary impregnation tanks 2 are contact impregnation tanks in which the substrate X is not immersed, and are each equipped with a kit roll 3. Further, the dust roll 3 in the second secondary impregnation tank 2 is combined with a presser roll 6, so that impregnation is performed by the squeeze roll method. This presser roll 6 is
It is arranged so that the clearance with the kitsu roll 3 can be controlled, and the kitsu impregnation is normally performed while narrowing down the clearance with the thickness of the base material or about twice the thickness of the base material.
なお、この発明において、「浸漬を伴う含浸法１とは、
第１図にみるような浸漬後のスクイズを伴う浸漬・スク
イズ法、および、浸漬のみ行う単なる浸漬法、さらに、
ワニスの含浸付着量を調節するためのコキ棒（しごき棒
）等を使用する浸漬法などを意味している。要するに、
基材がいったんワニス中に浸漬されることにより含浸が
行われるのであれば、浸漬後の処理方法については、特
に限定はされないのである。In addition, in this invention, "impregnation method 1 involving immersion" means
A dipping/squeezing method that involves squeezing after dipping as shown in FIG. 1, a simple dipping method that involves only dipping, and
This refers to a dipping method that uses a wand, etc. to adjust the amount of varnish applied. in short,
As long as the impregnation is performed by once dipping the base material in the varnish, there are no particular limitations on the treatment method after dipping.
従来は、上にみたように、低粘度のワニスによる一次含
浸がキツス法によりなされていたため、ワニスが基材を
充分に濡らすことができず、−次含浸用ワニスの含浸が
不充分なまま、基材が二次含浸槽へ送られていた。その
ため、二次含浸用ワニスによる本含浸が行われる際に、
ワニスが均等に浸透していくことが困難となり、含浸ム
ラが発生していた。それに対して、この発明にかかる製
法においては、上にみたように、まず、低粘度のワニス
に基材が浸漬されることによりワニスが充分に浸透して
基材のワニスに対する濡れ性を向上させるため、二次含
浸用ワニスの浸透を容易にさせる条件が整うのである。Conventionally, as seen above, the primary impregnation with a low-viscosity varnish was carried out by the Kitsu method, and the varnish was unable to wet the base material sufficiently, leaving the impregnation with the varnish for the secondary impregnation insufficient. The substrate was being sent to a secondary impregnation tank. Therefore, when main impregnation with varnish for secondary impregnation is performed,
It became difficult for the varnish to penetrate evenly, resulting in uneven impregnation. In contrast, in the manufacturing method according to the present invention, as seen above, the base material is first immersed in a low-viscosity varnish, so that the varnish sufficiently penetrates and improves the wettability of the base material to the varnish. Therefore, conditions are created to facilitate the penetration of the varnish for secondary impregnation.
さらに、二次含浸を、キツス法（絞りキツス法も含む）
により空気を脱泡しながら行ったり、浸漬によりワニス
を充分に浸透させながら行ったりするため、ワニスを基
材へ均等に含浸させつつ、含浸性をより高めることがで
きるのである。Furthermore, secondary impregnation is carried out using the Kittus method (including the squeeze Kittus method).
Since the process is performed while defoaming the air or by sufficiently permeating the varnish by dipping, it is possible to impregnate the base material with the varnish evenly and improve its impregnating properties.
なお、この発明において、二次含浸用ワニスＢを用いた
キツス含浸（絞りキツス含浸も含む）および浸漬を伴う
含浸の回数は、それぞれが１回以上であれば特に限定さ
れることはなく、それらの含浸を行う順序も任意に選択
されうる。また、第１図には、各々キツスロール３（押
えロール６と対になったものも含む）または−組のスク
イズロール５を備えた複数個の二次含浸槽２が示されて
いるが、二次含浸槽２が、所定数のキツスロール３およ
びスクイズロール５を備えたものであって、そのような
二次含浸槽２が、たとえば１個用意されているようであ
ってもよい。スクイズロール５は、その一方のロールが
一部分ワニス中に浸漬されていて、基材Ｘにワニスを転
写するようになっていてもよい。また、キツスロール３
およびスクイズロール５は、さらに別のロールと組合わ
されてなるものであってもよい。さらに、−次、二次浸
漬含浸槽には、スクイズロール５の代わりに、付着ワニ
ス量を開部するためのコキ棒等が備えられていてもよい
し、あるいは、それらの手段を全く有していない浸漬用
のみの含浸槽を使用してもよい。要するに、浸漬を伴う
含浸法により低粘度の一次含浸用ワニスが含浸された基
材が、高粘度の二次含浸用ワニス中で、キツス法および
浸漬を伴う含浸法による複数回の含浸を受けることがで
きれば、この発明における上記の効果が得られるのであ
る。In addition, in this invention, the number of times of kitsu impregnation (including squeeze kitsu impregnation) using varnish B for secondary impregnation and impregnation accompanied by dipping is not particularly limited as long as each is performed once or more. The order of impregnation can also be arbitrarily selected. FIG. 1 also shows a plurality of secondary impregnating tanks 2, each equipped with a squeeze roll 3 (including one paired with a presser roll 6) or a pair of squeeze rolls 5. The secondary impregnation tank 2 may include a predetermined number of squeeze rolls 3 and squeeze rolls 5, and for example, one such secondary impregnation tank 2 may be provided. One of the squeeze rolls 5 may be partially immersed in varnish to transfer the varnish to the base material X. Also, Kitsu roll 3
The squeeze roll 5 may also be combined with another roll. Further, the secondary immersion impregnation tank may be equipped with a squeeze rod or the like for opening the amount of adhered varnish instead of the squeeze roll 5, or may have no such means at all. You may also use an impregnating bath for immersion only. In short, a substrate impregnated with a low viscosity primary impregnation varnish by an impregnation method involving dipping is subjected to multiple impregnations by the Kitsus method and an impregnation method involving dipping in a high viscosity secondary impregnation varnish. If this is possible, the above-mentioned effects of the present invention can be obtained.
このようにして行われる、この発明にかかるプリプレグ
の製法において使用される基材としては、ガラス、アス
ベスト等の無機質繊維やポリエステル、ポリアミド等の
合成繊維または木綿等の天然繊維からなる織布あるいは
不織布、リンター紙、クラフト紙、アスベスト紙等の紙
などの一般的なものが例示できる。それらの基材の厚み
は、特に限定はされないが、０．０５〜０．４ ｗ程度
であることが好ましい。The base material used in the prepreg manufacturing method of the present invention, which is carried out in this way, is a woven or non-woven fabric made of inorganic fibers such as glass and asbestos, synthetic fibers such as polyester and polyamide, or natural fibers such as cotton. Examples include common papers such as linter paper, kraft paper, and asbestos paper. Although the thickness of these base materials is not particularly limited, it is preferably about 0.05 to 0.4 W.
一次および二次含浸用のワニスとなる樹脂としては、た
とえば、フェノール樹脂、エポキシ樹脂、メラミン樹脂
、ポリイミド樹脂、不飽和ポリエステル樹脂、ビニルエ
ステル樹脂、フッ素樹脂。Examples of resins used as varnishes for primary and secondary impregnation include phenolic resins, epoxy resins, melamine resins, polyimide resins, unsaturated polyester resins, vinyl ester resins, and fluororesins.
ポリブタジェン樹脂、ポリスルホン樹脂およびこれらの
樹脂の変性物等が挙げられ、単独で、あるいは、複数種
を併せて使用される。ここで、−次含浸用と二次含浸用
の樹脂が、同一種のものでも、異種のものでもよいこと
は言うまでもない。Examples include polybutadiene resin, polysulfone resin, and modified products of these resins, which may be used alone or in combination. Here, it goes without saying that the resins for secondary impregnation and for secondary impregnation may be of the same type or of different types.
上記の樹脂は、必要に応じて、硬化剤や硬化促進剤また
は重合開始剤、触媒あるいはその他の各種添加剤等を含
んでいてもよく、水、メタノール、エタノール、アセト
ン、シクロヘキサノン、スチレン等の溶剤により適度な
粘度（濃度）に希釈されて、ワニスに調製される。ワニ
スの粘度については、二次含浸用ワニスの粘度が一次含
浸用ワニスのそれよりも高くなるように調整されていれ
ば、特に限定はされないが、含浸性１作業性等の観点か
ら、二次含浸用ワニスの粘度は、５０〜１０００ｃｐｓ
であることが好ましい。The above resin may contain a curing agent, curing accelerator, polymerization initiator, catalyst, or various other additives, etc., as necessary, and a solvent such as water, methanol, ethanol, acetone, cyclohexanone, or styrene. It is diluted to an appropriate viscosity (concentration) and prepared into varnish. The viscosity of the varnish is not particularly limited as long as the viscosity of the varnish for secondary impregnation is adjusted to be higher than that of the varnish for primary impregnation. The viscosity of the impregnating varnish is 50 to 1000 cps
It is preferable that
以上のようにして得られるワニスの前記基材への含浸量
は、−次含浸用ワニスの場合、乾燥後の重量比で５〜２
０％であり、−次、二次含浸用ワニスの両者の合計が４
０〜６０％程度であることが適当であるが、その範囲を
外れていても構わない。In the case of a varnish for secondary impregnation, the amount of the varnish obtained as described above impregnated into the base material is 5 to 2 in weight ratio after drying.
0%, and the total of both the -next and secondary impregnation varnishes is 4
Appropriately, it is about 0 to 60%, but it may be outside that range.
なお、含浸後の基材の各含浸槽間における乾燥および最
後の仕上げの乾燥は、風乾でもよいが、必要に応じては
公知の方法により加熱乾燥を行ってもよい。また、キツ
ス法による含浸を繰り返す際には、２０〜３０秒程度の
タイミング時間を置くことが好ましい。Note that the drying of the base material after impregnation between the respective impregnating tanks and the final drying may be performed by air drying, but if necessary, heat drying may be performed by a known method. Further, when repeating impregnation by the Kitsu method, it is preferable to allow a timing period of about 20 to 30 seconds.
次に、この発明の実施例および従来例について説明する
。Next, embodiments of the present invention and conventional examples will be described.
（実施例）
基材として厚み０．２ｆｉのクラフト紙を、−次含浸用
ワニスとして粘度１０ｃｐｓ、樹脂含有量３０重量％の
メラミン樹脂ワニスを、二次含浸用ワニスとして粘度１
００ｃｐｓ 、樹脂含有量５０重量％のフェノール樹脂
ワニスを使用した。(Example) Kraft paper with a thickness of 0.2 fi was used as the base material, a melamine resin varnish with a viscosity of 10 cps and a resin content of 30% by weight was used as the varnish for secondary impregnation, and a viscosity of 1 as the varnish for secondary impregnation.
00 cps and a phenolic resin varnish with a resin content of 50% by weight was used.
上記紙基材に、乾燥後の重量比で樹脂含有量が１０％に
なるように、上記−次含浸用ワニスを浸漬・スクイズに
より含浸させた。風乾後、上記二次含浸用ワニスをキツ
ス法、絞りキツス法および浸漬・スクイズ法をこの順で
行うことにより含浸させ（第１図参照）、１５０℃で２
０分間加熱乾燥し、２種の樹脂の合計含有量が乾燥後の
重量比で５０％であるプリプレグを得た。なお、二次含
浸用ワニスの含浸量は、キツス法により５％、絞りキツ
ス法により５％、浸漬・スクイズ法により３０％の合計
４０％（いずれも乾燥後の重量比）である。The above-mentioned paper base material was impregnated with the above-mentioned varnish for secondary impregnation by dipping and squeezing so that the resin content was 10% by weight after drying. After air-drying, the varnish for secondary impregnation was impregnated with the above-mentioned secondary impregnation varnish by performing the kitsu method, squeezing kittsu method, and dipping/squeezing method in this order (see Figure 1).
The prepreg was dried by heating for 0 minutes to obtain a prepreg in which the total content of the two types of resins was 50% by weight after drying. The amount of impregnation of the varnish for secondary impregnation was 5% by the Kittus method, 5% by the squeezing Kittus method, and 30% by the dipping/squeeze method, for a total of 40% (all weight ratios after drying).
（従来例）
基材および含浸用ワニスは、上記実施例と同様のものを
使用し、樹脂含有量が乾燥後の重量比で１０％になるよ
うに、キツス法により一次含浸用ワニスを紙基材に含浸
させた。(Conventional Example) The same base material and impregnating varnish as in the above example were used, and the primary impregnating varnish was applied to the paper base by the Kitsu method so that the resin content was 10% by weight after drying. impregnated into the material.
風乾後、浸漬・スクイズを行って二次含浸用ワニスを含
浸させ（第２図参照）、実施例と同様にして加熱乾燥し
、２種の樹脂の合計含有量が乾燥後の重量比で５０％で
あるプリプレグを得た。After air-drying, immersion and squeezing were performed to impregnate the secondary impregnating varnish (see Figure 2), and heat-drying was performed in the same manner as in the example, until the total content of the two resins was 50% by weight after drying. % prepreg was obtained.
実施例および従来例で得たプリプレグをそれぞれ８枚ず
つ重ね、１６０℃、 １００ ｋｇ／ｃＪで１時間積
層成形して積層板を作製した。Eight sheets of each of the prepregs obtained in the example and the conventional example were stacked and laminated and molded at 160° C. and 100 kg/cJ for 1 hour to produce a laminate.
得られた積層板を、１００℃の沸騰水中で２時間煮沸し
、処理後の積層板の絶縁抵抗を測定した。また、２３℃
の水中に２４時間浸漬した後の積層板の吸水率を測定し
た。The obtained laminate was boiled in boiling water at 100° C. for 2 hours, and the insulation resistance of the treated laminate was measured. Also, 23℃
The water absorption rate of the laminate was measured after being immersed in water for 24 hours.
以上の性能試験の結果を、第１表に示す。The results of the above performance tests are shown in Table 1.
第１表にみるように、実施例の積層板では煮沸または浸
漬処理後の耐水性が良好で、優れた絶縁性を示している
。As shown in Table 1, the laminates of Examples have good water resistance after boiling or immersion treatment, and exhibit excellent insulation properties.
この発明にかかるプリプレグの製法は、以上のようであ
り、低粘度の一次含浸用ワニスが含浸された基材に、前
記−次含浸用ワニスよりも高粘度の二次含浸用ワニスを
含浸させてプリプレグを得るにあたり、前記−次含浸用
ワニスの含浸が浸漬を伴う含浸法によりなされており、
前記二次含浸用ワニスの含浸がキツス法および浸漬を伴
う含浸法により複数回なされているため、ワニスの含浸
性を高め、品質の良いプリプレグを提供することを可能
とさせる。The prepreg manufacturing method according to the present invention is as described above, and includes impregnating a base material impregnated with a low-viscosity varnish for primary impregnation with a varnish for secondary impregnation having a higher viscosity than the varnish for secondary impregnation. In obtaining the prepreg, impregnation with the varnish for secondary impregnation is performed by an impregnation method involving dipping,
Since the impregnation with the varnish for secondary impregnation is performed multiple times by the kitsu method and the impregnation method involving dipping, it is possible to improve the impregnating property of the varnish and provide a high-quality prepreg.
第１図はこの発明にかかるプリプレグの製法の一実施例
を表す概略模式断面図であり、第２図は従来のプリプレ
グの製法における含浸法を表す概略模式断面図である。
１・・・−次含浸槽 ２・・・二次含浸槽 ３・・・キ
ッスロール ５・・・スクイズロール Ａ・・・−次含
浸用ワニス Ｂ・・・二次含浸用ワニス
代理人 弁理士 松 本 武 彦FIG. 1 is a schematic cross-sectional view showing an embodiment of the prepreg manufacturing method according to the present invention, and FIG. 2 is a schematic cross-sectional view showing an impregnation method in the conventional prepreg manufacturing method. 1...-Second impregnation tank 2...Secondary impregnation tank 3...Kiss roll 5...Squeeze roll A...Varnish for second impregnation B...Varnish agent for secondary impregnation Patent attorney Takehiko Matsumoto
Claims (2)
前記一次含浸用ワニスよりも高粘度の二次含浸用ワニス
を含浸させてプリプレグを得るにあたり、前記一次含浸
用ワニスの含浸が浸漬を伴う含浸法によりなされており
、前記二次含浸用ワニスの含浸がキッス法および浸漬を
伴う含浸法により複数回なされていることを特徴とする
プリプレグの製法。(1) A base material impregnated with a low viscosity primary impregnation varnish,
In obtaining a prepreg by impregnating a varnish for secondary impregnation with a higher viscosity than the varnish for primary impregnation, the impregnation of the varnish for primary impregnation is performed by an impregnation method that involves dipping, and the impregnation of the varnish for secondary impregnation is performed by an impregnation method that involves dipping. A prepreg manufacturing method, characterized in that the process is performed multiple times by a kiss method and an impregnation method involving dipping.
である特許請求の範囲第１項記載のプリプレグの製法。(2) The viscosity of the varnish for secondary impregnation is 50 to 1000 cps
A method for producing a prepreg according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26247987A JPH01104629A (en) | 1987-10-16 | 1987-10-16 | Production of prepreg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26247987A JPH01104629A (en) | 1987-10-16 | 1987-10-16 | Production of prepreg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01104629A true JPH01104629A (en) | 1989-04-21 |
Family
ID=17376356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26247987A Pending JPH01104629A (en) | 1987-10-16 | 1987-10-16 | Production of prepreg |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01104629A (en) |
-
1987
- 1987-10-16 JP JP26247987A patent/JPH01104629A/en active Pending
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