JPS6042567B2 - Manufacturing method for electrical laminates - Google Patents
Manufacturing method for electrical laminatesInfo
- Publication number
- JPS6042567B2 JPS6042567B2 JP53125540A JP12554078A JPS6042567B2 JP S6042567 B2 JPS6042567 B2 JP S6042567B2 JP 53125540 A JP53125540 A JP 53125540A JP 12554078 A JP12554078 A JP 12554078A JP S6042567 B2 JPS6042567 B2 JP S6042567B2
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- Japan
- Prior art keywords
- present
- coating
- resin
- laminate
- manufacturing
- 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.)
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Description
【発明の詳細な説明】 本発明は電気用積層板の製造方法に関する。[Detailed description of the invention] The present invention relates to a method of manufacturing an electrical laminate.
さらに詳しくは表面の平滑性に優れた電気用積層板 の
製造方法に関する。 本発明でいう電気用積層板とは各
種電子部品の基板として使用される積層絶縁板あるいは
銅張り積層板に用いれる積層板を意味し、その形状はお
おむね厚みが0.3〜5wrm程度のものである。More specifically, the present invention relates to a method for producing an electrical laminate with excellent surface smoothness. The electrical laminate used in the present invention refers to a laminate used for laminated insulating boards or copper-clad laminates used as substrates for various electronic components, and its shape is approximately 0.3 to 5 wrm in thickness. It is.
従来これらは紙を基材としたフェノール樹脂、ガラス
クロスを基材としたエポキシ樹脂等によつて加熱加圧方
式によつて製造されているのが一般的である。また、常
温で固体であつたり結晶性を゛有する不飽和ポリエステ
ル樹脂のワニスを用い、非粘着性のプリプレグを形成し
、積層し、加圧プ レスによつて製造する方法も提案さ
れているが、原料高等から十分に実用化されていない。
一方、常温において液状である不飽和ポリエス・チル
樹脂を用いると、非粘着性のプリプレグを形成できず、
加えてプレス加圧加工時、樹脂の流動性が大きく加圧成
形が困難である等の理由によつて従来方法によつて製造
することが困難てあり、従つてこのような樹脂を用いた
ものは全く実用化フされていない。Conventionally, these materials have generally been manufactured using a heating and pressing method using phenol resin based on paper, epoxy resin based on glass cloth, or the like. In addition, a method has been proposed in which a non-adhesive prepreg is formed using an unsaturated polyester resin varnish that is solid at room temperature and has crystallinity, and the prepreg is laminated and manufactured by pressure pressing. However, due to the high quality of raw materials, it has not been fully put into practical use.
On the other hand, when using unsaturated polyester chill resin that is liquid at room temperature, a non-adhesive prepreg cannot be formed.
In addition, during press processing, it is difficult to manufacture using conventional methods due to the high fluidity of the resin and the difficulty of pressure molding. has not been put into practical use at all.
しカルながら、かかる常温で液状である不飽和ポリエス
テル樹脂を用いる場合は、たとえば基材への含浸工程に
いて溶剤を必要とせず、かつ硬化反応がラジカル重合で
あり、硬化の際なんらの易揮発性成分の除去を必要とし
ないという点で優れており、従つてコスト的にも有利な
製品を製造できる可能性があり、新規な製造方法が望ま
れていた。本発明者らは、かかる観点に鑑みて鋭意研究
を行つた結果、室温において液状である不飽和ポリエス
テル樹脂液を基材に含浸し、次いで積層し、さらに、ラ
ジカル重合を阻害する空気を遮断する目的や表面の平滑
性を確保する目的で、カバーフィルムやシートを被覆し
、硬化せしめることによつて、性状にすぐれた製品を製
造できることを見い出した。However, when using an unsaturated polyester resin that is liquid at room temperature, for example, a solvent is not required in the process of impregnating the base material, and the curing reaction is radical polymerization, so there is no easy volatilization during curing. This method is superior in that it does not require the removal of sexual components, and therefore has the potential to produce products that are advantageous in terms of cost, and a new manufacturing method has been desired. The present inventors conducted extensive research in view of this point of view and found that a base material is impregnated with an unsaturated polyester resin liquid that is liquid at room temperature, then laminated, and air that inhibits radical polymerization is blocked. It has been discovered that a product with excellent properties can be manufactured by covering the product with a cover film or sheet and curing it for the purpose of ensuring surface smoothness.
この方法は連続無圧成形ができるという特徴を有するが
、製品の平面の平滑性に欠点があつた。本発明者らはさ
らに研究を続けた結果、このフィルム状あるいはシート
状物の剛性を適度に制御することによつて表面の平滑性
に優れた製品を製造できることを見い出し本発明に到達
した。Although this method has the feature of being able to perform continuous non-pressure molding, it has a drawback in the flatness of the product. As a result of further research, the present inventors discovered that by appropriately controlling the rigidity of this film or sheet material, it was possible to produce a product with excellent surface smoothness, and thus arrived at the present invention.
本発明でいう表面の平滑性とは後述するごとく、微視的
な凹凸および主として基材の表面性に依存する波のうね
りにも似たゆるやかな巨視的な凹凸をいう。すなわち本
発明は、室温において液状である不飽和ポリエステル樹
脂液を並行して連続的に供給される複数枚の基材に含浸
し、該樹脂含浸基材を積層し、さらにフィルム状あるい
はシート状物の剛性を曲げ弾性率(E−K9/CTI)
と厚さ(Dcm)の3乗の積即ち、E−D3k9・αで
規定する時、該.剛性値が3×10−3kg・G以上3
×101k9・σ以下であるフィルム状あるいはシート
状物によつて上記積層体を連続的に被覆し、実質的に無
圧の条件下て硬化せしめることを特徴とする電気用積層
板の連続的な製造方法である。As described later, the term "surface smoothness" as used in the present invention refers to microscopic irregularities and gentle macroscopic irregularities resembling wave undulations that depend mainly on the surface properties of the base material. That is, the present invention impregnates a plurality of base materials that are continuously supplied in parallel with an unsaturated polyester resin liquid that is liquid at room temperature, laminates the resin-impregnated base materials, and then forms a film or sheet-like product. Flexural modulus of stiffness (E-K9/CTI)
When defined as the product of the cube of the thickness (Dcm), that is, E-D3k9・α, the . Rigidity value is 3 x 10-3 kg・G or more 3
A continuous electrical laminate characterized in that the laminate is continuously coated with a film or sheet material having a hardness of x101k9・σ or less and cured under substantially no pressure conditions. This is the manufacturing method.
本発明に用いる不飽和ポリエステルは市販の良く知られ
たもので良いが、硬化前、不飽和ポリエステル鎖と架橋
用共重合性単量体の混合物が室温において液状であるも
のを用いる。The unsaturated polyester used in the present invention may be any well-known commercially available polyester, but one in which the mixture of the unsaturated polyester chain and the crosslinking comonomer is liquid at room temperature before curing is used.
本発明においては、プロピレグリコール、イソ・フタル
酸およびフマル酸によつて合成された不飽和ポリエステ
ル鎖を用いるのが、製品の耐熱性や寸法安定性において
、より有利である。In the present invention, it is more advantageous in terms of heat resistance and dimensional stability of the product to use an unsaturated polyester chain synthesized from propylene glycol, iso-phthalic acid and fumaric acid.
共重合性単量体としては、スチレン、α−メチルスチレ
ン、ビニルトルエン、ジビニルベンゼン等が良く、スチ
レンとジビニルベンゼンのごとき多官能性炭化水素系単
量体を併用するのが、あるいは、要すればこれらのもの
と単官能性誘導体を併用するのが製品の寸法安定性等に
おいてより優れている。また、樹脂液の粘度は室温にい
て0.1〜15ポイズ、より望ましくは0.5〜7ポイ
ズのものを用いるのが望ましい実施態様である。これは
基材への望ましい含浸を確保するためである。ノ 本発
明でいう基材とは、リンター紙やクラフト紙等の紙、ガ
ラス布、あるいは無機および有機繊維からなる不織布等
シート状基材をいう。Styrene, α-methylstyrene, vinyltoluene, divinylbenzene, etc. are suitable as copolymerizable monomers, and it is preferable to use polyfunctional hydrocarbon monomers such as styrene and divinylbenzene together, or if necessary. If these materials are used in combination with a monofunctional derivative, the dimensional stability of the product is better. Further, in a preferred embodiment, the viscosity of the resin liquid at room temperature is 0.1 to 15 poise, more preferably 0.5 to 7 poise. This is to ensure the desired impregnation of the substrate. The base material as used in the present invention refers to a sheet-like base material such as paper such as linter paper or kraft paper, glass cloth, or nonwoven fabric made of inorganic and organic fibers.
本発明においては、樹脂含浸基材を必要枚数積層し、さ
らにフィルム状あるいはシート状被覆物・力幼バーされ
る。In the present invention, a required number of resin-impregnated base materials are laminated, and a film or sheet-like covering/forced bar is further formed.
これら積層物や被覆物のカバーの際のロールやブレード
状物等を用いて過剰な樹脂液を拝除しつつ、必要樹脂量
を制御するとが望ましいが、この時、積層体に圧縮力が
働き、また一般に基材の表面は微視的に平滑でないので
、剛”性の小さい被覆物を用いると、この微視的および
巨視的な凹凸に該被覆物が追従し、かつ本発明において
は、後述するごとく無圧の条件下で硬化させるが故に、
製品の表面性が十分でない場合が起こる。本発明者らの
研究によれば、E−D3k9・αで規定されるフィルム
状あるいはシート状物の剛性値が3×10−3k9・α
以上である時、実用的に好ましい表面の平滑性が得られ
た。When covering these laminates and coatings, it is desirable to control the amount of resin required while removing excess resin liquid using a roll or blade-like object, but at this time, compressive force acts on the laminate. In addition, since the surface of the base material is generally not microscopically smooth, if a coating with low rigidity is used, the coating will follow the microscopic and macroscopic irregularities, and in the present invention, As described below, since it is cured under no pressure conditions,
There are cases where the surface quality of the product is not sufficient. According to the research of the present inventors, the rigidity value of a film or sheet-like material defined by E-D3k9・α is 3×10−3k9・α
When the above conditions were met, a practically preferable surface smoothness was obtained.
さらに剛性値が5X10−1k9・G以上である時、よ
り望ましい結果を得る。本発明においては、剛性値が3
×10−3k9・d以上であり、かつ可撓性を有する被
覆物を用いるのが、長尺物を確保できることや、積層板
からの剥離の際の作業性等から好ましい。かかる被覆物
で両面をカバーし、樹脂液を硬化せることによつて、本
発明は達成される。硬化は有機過酸化物を重合開始剤と
して用いるのが一般的であり、これらの種類や促進剤の
併用によつて硬化温度が選択されるが、樹脂のポツトラ
イフ等の観点等から、硬化温度が60のC〜1500C
になるような処方が好適である。Furthermore, more desirable results are obtained when the stiffness value is 5X10-1k9·G or more. In the present invention, the stiffness value is 3
It is preferable to use a coating having a diameter of ×10 −3 k9·d or more and having flexibility, from the viewpoint of ensuring long objects and workability when peeling from the laminate. The present invention is achieved by covering both sides with such a coating and curing the resin liquid. For curing, organic peroxides are generally used as polymerization initiators, and the curing temperature is selected depending on the type of these and the combination of accelerators, but from the viewpoint of the pot life of the resin, etc. 60C~1500C
Preferably, the prescription will be such that:
もちろん熱硬化以外にも光、電子線、放射線等による硬
化も可能であり、本発明はそれらにつき何ら制限はない
。また、硬化の際、本発明においては特別な加圧を必要
とせずして、良好な製品を製造できる。むしろ、不必要
な加圧は樹脂の流出をまねいたり、あるいは製品内部に
歪をを発生させる場合があり、寸法安定性等の点にしば
しば好ましくない結果を与える。以上、両面を被覆物で
カバーした場合の電気用−積層板について記載したが、
本発明では、さらに片面を例えば電解銅箔とすることに
よつて、平面平滑性の優れた片面銅張り積層板を製造で
きる。Of course, in addition to thermal curing, curing by light, electron beam, radiation, etc. is also possible, and the present invention is not limited thereto. Further, during curing, in the present invention, a good product can be manufactured without requiring special pressure. On the contrary, unnecessary pressurization may cause the resin to flow out or cause distortion within the product, often resulting in unfavorable results in terms of dimensional stability and the like. Above, we have described electrical laminates with both sides covered with coatings.
In the present invention, a single-sided copper-clad laminate with excellent planar smoothness can be manufactured by using electrolytic copper foil on one side, for example.
あるいは樹脂液含浸積層板の片面のみに本発明の被覆物
をカバーし、他面に他の被覆物を用いることによつて片
面が表面の平滑性に優れた電気用積層板をも製造できる
。本発明においては基材としてセルロース繊維を主体と
する紙を用いるのがすぐれた実施態様の一つである。Alternatively, by covering only one side of a resin liquid-impregnated laminate with the coating of the present invention and using another coating on the other side, it is possible to produce an electrical laminate with excellent surface smoothness on one side. In the present invention, one of the preferred embodiments is to use paper mainly composed of cellulose fibers as the base material.
厚みが200〜300pであつて、坪量が150g/d
前後のリンター紙やクラフト紙が好適である。これらの
紙は通常、第1図に示すごとき微視的な凹凸を有し、剛
性値が3×10−3kg・α未満の被覆物、例えば厚さ
が35pのポリエステルフィルム(曲げ弾性率が2.8
1×10−4k9・dであり、従つて剛性値は1.20
×10−3k9・dであつた)を用いると第1図に示す
ごとく、フィルムが紙の凹凸に追従し、表面の平滑性が
良好でない製品となる。被覆物の剛性値が3X10−3
k9・αを超えると、基材の凹凸に対する追従が軽減さ
れる。例えば剛性値が2.81刈0−2k9・α、厚さ
が100pのポリエステルフィルムを用いた場合は、第
2図に示すごとき、基材の凹凸に対する追従は軽微とな
る。より望ましくは、剛性値が5×10−1kg・礪以
上の被覆物、例えば厚みが100μであるアルミニウム
箔(このものの曲げ弾性率は0.67×1Cfkg・d
1従つて剛性値が6.7×10−1kg・αであつた)
、あるいは厚みが100μのステンレス箔(このものの
曲け弾性率は1.86×1Cf′Kg・Clt、従つて
剛性値は1.86kg・礪である)等が本発明において
好適である。また、本発明で用いる被覆物は単独フィル
ムあるいはシート状物でもよく、また、複合化されたフ
ィルムあるいはシート状物でもよい。The thickness is 200 to 300p and the basis weight is 150g/d.
Front and rear linter paper or kraft paper are suitable. These papers usually have microscopic irregularities as shown in Figure 1, and are coated with a rigidity value of less than 3 x 10-3 kg・α, such as a polyester film with a thickness of 35p (flexural modulus of 2). .8
1×10-4k9・d, so the stiffness value is 1.20
x10-3k9.d), the film follows the irregularities of the paper, resulting in a product with poor surface smoothness, as shown in FIG. The rigidity value of the coating is 3X10-3
When k9·α is exceeded, the ability to follow the unevenness of the base material is reduced. For example, when a polyester film with a rigidity value of 2.81 0-2k9·α and a thickness of 100p is used, as shown in FIG. 2, the following of the unevenness of the base material is slight. More preferably, a coating with a rigidity value of 5 x 10-1 kg/cm or more, for example, an aluminum foil with a thickness of 100 µm (the flexural modulus of this material is 0.67 x 1 Cfkg/d
1 Therefore, the stiffness value was 6.7 × 10-1 kg・α)
, or a stainless steel foil having a thickness of 100 μm (the bending elastic modulus of this material is 1.86×1 Cf'Kg·Clt, therefore, the rigidity value is 1.86 kg·T), etc. are suitable in the present invention. Further, the coating used in the present invention may be a single film or sheet-like material, or may be a composite film or sheet-like material.
一般に剛性は温度が上昇すると低下するが、本発明にお
いては、被覆物の積層体へのカバーは通常室温て可能な
ので室温における剛性値が所定範囲であればよいが、特
にプラスチックフィルム等で硬化温度において著しく剛
性値が低下するようなものは好ましくない。In general, stiffness decreases as the temperature rises, but in the present invention, covering the laminate with the coating is usually possible at room temperature, so it is sufficient as long as the stiffness value at room temperature is within a predetermined range. It is not preferable that the stiffness value is significantly lowered.
また、硬化した不飽和ポリエステル樹脂と接着性が大き
いものは好ましくない。この観点から、セロハン、ポリ
エステル、ポリプロピレン、テフロン、ポリアミドイミ
ドフィルム等が適し、ポリイミドフィルムは不適である
。また、アルミ箔、圧延銅箔、ステンレス箔は好適であ
る。このように本発明においては被覆物と積層体の間に
特別の離形剤やあるいは離形紙を用いることなく容易に
被覆物の剥離が可能であり、離形紙等の挿入は不必要で
ある。もし離形等の目的でフィルム状物を挿入する場合
は被覆物と接合した複合シート状物であることが好まし
い。また、第2図から容易に推察できるごとく、製品の
表面は被覆物の表面性に依存するので、被覆物の表面が
鏡面であるものが好適である。以上、基材が紙の場合に
ついて述べたが、他の基材を用いた場合も同等のことが
言える。Moreover, those having high adhesiveness to the cured unsaturated polyester resin are not preferred. From this point of view, cellophane, polyester, polypropylene, Teflon, polyamideimide films, etc. are suitable, and polyimide films are not suitable. Moreover, aluminum foil, rolled copper foil, and stainless steel foil are suitable. In this way, in the present invention, the coating can be easily peeled off without using a special release agent or release paper between the coating and the laminate, and there is no need to insert release paper or the like. be. If a film-like material is inserted for the purpose of mold release, etc., it is preferably a composite sheet-like material bonded to a coating. Furthermore, as can be easily inferred from FIG. 2, the surface of the product depends on the surface properties of the coating, so it is preferable that the surface of the coating be a mirror surface. Although the case where the base material is paper has been described above, the same can be said when other base materials are used.
また、被覆物を長尺とし、連続的に搬送れる樹脂含浸基
材を積層し、該被覆物を連続的に被覆し、さらに硬化せ
しめることによつて、表面の平滑性にすぐれた電気用積
層板を連続的に製造することができる。In addition, by making the coating long, laminating resin-impregnated base materials that are continuously conveyed, and then continuously coating and curing the coating, we have created an electrical lamination with excellent surface smoothness. Plates can be manufactured continuously.
このためには、用いる被覆物の剛性値が3×10−3k
9・α以上であり、かつ可撓性を・有するものが好まし
い。可撓性を有するものは、ロール状の多層巻の形態、
あるいはエンドレスベルトの形態で取り扱うことが可能
であり、作業性を著しく高める。この観点から、被覆物
の剛性値は3×10−3k9・α〜3×101kg・G
の範囲のもの)が本発明に好適である。本発明によれば
、連続的な製造に際し、なんらの加圧を必要とせずして
表面の平滑性や性状に優れた電気用積層板を製造できる
。For this purpose, the stiffness value of the coating used must be 3 x 10-3k
It is preferable that it is 9.alpha. or more and has flexibility. Those with flexibility are in the form of a roll-like multilayer winding,
Alternatively, it can be handled in the form of an endless belt, greatly improving workability. From this point of view, the rigidity value of the coating is 3 x 10-3 k9・α ~ 3 x 101 kg・G
) are suitable for the present invention. According to the present invention, an electrical laminate with excellent surface smoothness and properties can be manufactured without requiring any pressure during continuous manufacturing.
本発明においては硬化の時の加圧は、圧縮力により、基
材や樹脂5に歪を発生させ、寸法安定性等の観点から好
ましくない。従つて、本発明は連続的に加圧するという
ような困難な工程を必要としないという点で特に優れて
いる。また、電気用積層板および銅張り積層板においO
ては耐熱性、難燃性、加熱あるいは吸湿下での寸法安定
性、吸湿特性、打ち抜き加工性、積層板と銅箔の接着強
度、電気絶縁特性等高度な特性が要求される。In the present invention, pressurization during curing causes distortion in the base material and resin 5 due to compressive force, which is not preferable from the viewpoint of dimensional stability and the like. Therefore, the present invention is particularly advantageous in that it does not require a difficult process such as continuous pressurization. Also, O in electrical laminates and copper-clad laminates.
This requires advanced properties such as heat resistance, flame retardancy, dimensional stability under heating or moisture absorption, moisture absorption properties, punching workability, adhesive strength between the laminate and copper foil, and electrical insulation properties.
従つて、こられの改良を目的として不飽和ポリエステル
樹脂液に各種の添加剤、混合物あるいは充填剤が配合さ
れることは一向にかまわず、なんら本発明を製限するも
のではない。以下実施例により本発明をさらに詳記する
。実施例1市販の不飽和ポリエステル樹脂(昭和高分子
製リゴラツク150HR123℃における粘度は5ポイ
ズ)に重合開始剤として、tーブチルパーオキシー2−
エチルヘキサノエート1重量部および重合促進剤として
6%ナフテン酸コバルト0.?配合たものを、市販のク
ラフト紙(巴川製紙製、MKP−150)に連続的に含
浸せしめ、この樹脂含浸紙2枚をロール間を通過させて
過剰な樹脂液を排除するとともに積層し、同時に厚さが
100pであるポリエステルフィルム(剛性値2.81
×10−2k9・CWL)を両面に被覆し、このものを
60℃から30分を要して100℃まで加温し、硬化さ
せ、さらに85℃×1′3!f!f間の条件でアフター
キユアを行つて、厚さが520pである表面平滑性にす
ぐれ表面のうねりが少ない電気用積層板を得た。Therefore, various additives, mixtures, or fillers may be added to the unsaturated polyester resin liquid for the purpose of improving these, and this does not limit the present invention in any way. The present invention will be described in further detail with reference to Examples below. Example 1 Commercially available unsaturated polyester resin (Showa Kobunshi Rigolak 150HR, viscosity at 123°C: 5 poise) was added as a polymerization initiator to t-butylperoxy-2-
1 part by weight of ethylhexanoate and 0.6% cobalt naphthenate as a polymerization accelerator. ? Commercially available kraft paper (MKP-150, manufactured by Tomegawa Paper Industries) was continuously impregnated with the blended material, and two sheets of this resin-impregnated paper were passed between rolls to remove excess resin liquid and laminated together. Polyester film with a thickness of 100p (stiffness value 2.81
x10-2k9・CWL) on both sides, heated from 60°C to 100°C over 30 minutes, hardened, and further coated with 85°C x 1'3! f! After-curing was carried out under the conditions of 520p to obtain an electrical laminate having a thickness of 520p, excellent surface smoothness, and little surface waviness.
また、このものはNEMA規格XPC相当品であつた。
比較例1
実施例1において、被覆物を厚さが3F3pであるポリ
エステルフィルム(剛性値1.54×10−3kg●C
m)としたものは、紙の凹凸が製品の表面に反映し、表
面の平滑性を求められる用途には不適であ,つた。Moreover, this product was equivalent to NEMA standard XPC.
Comparative Example 1 In Example 1, the coating was a polyester film with a thickness of 3F3p (rigidity value 1.54 x 10-3 kg●C
In the case of m), the unevenness of the paper was reflected on the surface of the product, making it unsuitable for applications requiring surface smoothness.
実施例2
実施例1において、被覆物を市販の厚さが100μの両
艷アルミニウム箔(剛性値6.7×10−1kg・C!
n)としたものは、うねりの少ないすぐれた表面3の平
滑性を示した。Example 2 In Example 1, the coating was made of commercially available aluminum foil with a thickness of 100 μm (rigidity value 6.7×10 −1 kg·C!).
The sample marked n) showed excellent surface smoothness with little waviness.
アルミニウム箔の剥離は容易であつた。実施例3実施例
1において、被覆物を市販の厚さが100pであるステ
ンレス箔(剛性値1.86k9・Cm)とし3たものは
、うねりの少ないすぐれた表面平滑性を示した。The aluminum foil was easily peeled off. Example 3 In Example 1, the coated material was a commercially available stainless steel foil having a thickness of 100p (rigidity value: 1.86 k9·Cm), and exhibited excellent surface smoothness with little waviness.
ステンレス箔の剥離は容易であつた。なお、実施例、比
較例における表面の平滑性の評価は目視および平面荒さ
計によつた。以上述べたとおり、本発明は従来法はブレ
スを使用する圧縮成形法であるために連続化が困難であ
つた電気用積層板の製造を、連続的に、かつ品質特に表
面平滑性においてブレスで圧縮成形した製品に遜色なく
製造することを可能としたものである。The stainless steel foil was easily peeled off. In addition, the evaluation of the surface smoothness in Examples and Comparative Examples was based on visual observation and a surface roughness meter. As described above, the present invention enables the production of electrical laminates, which was difficult to manufacture continuously due to the conventional compression molding method using a press, to be able to manufacture electrical laminates continuously and in terms of quality, especially surface smoothness. This makes it possible to manufacture products comparable to compression molded products.
すなわち、リジツトタイプの積層板の連続生産法ではブ
レスを使用できないから、例えば硬化に際し水を副生物
として発生するフェノール樹脂をフ使用すると内部に空
胴を生じ、到底満足な製品は得られない。That is, since a press cannot be used in the continuous production method of rigid type laminates, for example, if a phenol resin, which generates water as a by-product during curing, is used, a cavity will be created inside the resin, making it impossible to obtain a completely satisfactory product.
不飽和ポリエステル樹脂は硬化に際し揮発性副生物を発
生せず、しかも電気特性にもすぐれているので、本発明
の目的にかなつている。また並行して連続的に供給され
る複数枚の基材に樹脂液を含浸することは、含浸後の複
数枚の基材をそのまま積層し、積層物を被覆して硬化す
る以後の工程の連続化にとつて好都合であり、その間人
力による取扱いを必要としない。Unsaturated polyester resins do not generate volatile by-products during curing and have excellent electrical properties, so they are suitable for the purpose of the present invention. Also, impregnating multiple base materials that are continuously supplied in parallel with resin liquid involves a series of subsequent steps in which the multiple base materials are laminated as they are after impregnation, and the laminate is coated and cured. It is convenient for the process to develop, and does not require manual handling during that time.
さらに空気中の酸素は不飽和ポリエステル樹脂の重合禁
止剤であることが知られている。Furthermore, oxygen in the air is known to be a polymerization inhibitor for unsaturated polyester resins.
従つて硬化に際し未硬化積層板を空気との接触から遮断
しなければならない。この目的に用いる被覆物の剛性値
が適当な範囲になければ、ブレスを使用しないため硬化
前の積層板表面の凹凸に追従し、すぐれた表面平滑性を
有する積層板は得られない。また本発明方法に用いる被
覆物は、未硬化状態の樹脂液が硬化装置に付着し、汚染
することを防止するキャリアシートとしても役立つ。本
発明は、少なくともこれらの要件を組合せることにより
、縮成形法によつてつくつた従来の製品と比較して遜色
のない品質、特に表面平滑性を有する電気用積層板の工
業的連続生産を実用化可能としたものである。Therefore, during curing, the uncured laminate must be shielded from contact with air. If the stiffness value of the coating used for this purpose is not in an appropriate range, the coating will follow the unevenness of the surface of the laminate before curing because no press is used, and a laminate with excellent surface smoothness will not be obtained. The coating used in the method of the present invention also serves as a carrier sheet to prevent uncured resin liquid from adhering to and contaminating the curing device. By combining at least these requirements, the present invention enables the continuous industrial production of electrical laminates with quality, especially surface smoothness, that is comparable to conventional products made by shrinkage molding. This makes it possible to put it into practical use.
第1図および第2図は基材の凹凸と被覆物の関係を示す
模式図である。
1は被覆物、2は樹脂含浸基材、3は樹脂層である。FIGS. 1 and 2 are schematic diagrams showing the relationship between the unevenness of the base material and the coating. 1 is a coating, 2 is a resin-impregnated base material, and 3 is a resin layer.
Claims (1)
行して連続的に供給される複数枚の基材に含浸し、該樹
脂含浸基材を積層しさらにフィルム状あるいはシート状
物の剛性を曲げ弾性率(E・kg/cm^2)と厚さ(
dcm)の3乗の積、すなわちE・d^3kg・cmで
規定する時、該剛性値が3×10^−^3kg・cm以
上3×10^1kg・cm以下であるフィルム状あるい
はシート状長尺被覆物によつて上記積層体を連続的に被
覆し、実質的に無圧の条件下で硬化せしめることを特徴
とする電気用積層板の製造方法。 2 基材がセルロース繊維を主体とする紙である特許請
求の範囲第1項記載の電気用積層板の製造方法。 3 フィルム状あるいはシート状物の表面が鏡面である
特許請求の範囲第1項記載の電気用積層板の製造方法。[Claims] 1. A plurality of base materials that are continuously supplied in parallel are impregnated with an unsaturated polyester resin liquid that is liquid at room temperature, and the resin-impregnated base materials are laminated to form a film or sheet. The stiffness of a shaped object is calculated by bending elastic modulus (E・kg/cm^2) and thickness (
dcm) to the third power, that is, E・d^3kg・cm, the rigidity value is 3×10^-^3kg・cm or more and 3×10^1kg・cm or less. A method for manufacturing an electrical laminate, characterized in that the laminate is continuously coated with a long coating and cured under substantially no pressure conditions. 2. The method for manufacturing an electrical laminate according to claim 1, wherein the base material is paper mainly composed of cellulose fibers. 3. The method for manufacturing an electrical laminate according to claim 1, wherein the surface of the film-like or sheet-like material is a mirror surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53125540A JPS6042567B2 (en) | 1978-10-11 | 1978-10-11 | Manufacturing method for electrical laminates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53125540A JPS6042567B2 (en) | 1978-10-11 | 1978-10-11 | Manufacturing method for electrical laminates |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5550521A JPS5550521A (en) | 1980-04-12 |
JPS6042567B2 true JPS6042567B2 (en) | 1985-09-24 |
Family
ID=14912715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53125540A Expired JPS6042567B2 (en) | 1978-10-11 | 1978-10-11 | Manufacturing method for electrical laminates |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6042567B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62172525U (en) * | 1986-04-21 | 1987-11-02 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56166054A (en) * | 1980-05-26 | 1981-12-19 | Kanegafuchi Chemical Ind | Continuous manufacture of laminated board for electricity or metallic foil plated laminated board |
JPS5718386A (en) * | 1980-07-09 | 1982-01-30 | Mitsubishi Electric Corp | Method of flattening surface of board |
JPS5749294A (en) * | 1980-09-08 | 1982-03-23 | Kanegafuchi Chemical Ind | Method of producing continuously electric laminated board |
JPS641536A (en) * | 1988-03-12 | 1989-01-05 | Kanegafuchi Chem Ind Co Ltd | Continuous preparation of hard laminated body for electric application |
-
1978
- 1978-10-11 JP JP53125540A patent/JPS6042567B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62172525U (en) * | 1986-04-21 | 1987-11-02 |
Also Published As
Publication number | Publication date |
---|---|
JPS5550521A (en) | 1980-04-12 |
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