JPH0757808B2 - Glass fiber non-woven fabric, manufacturing method thereof, and laminated plate - Google Patents
Glass fiber non-woven fabric, manufacturing method thereof, and laminated plateInfo
- Publication number
- JPH0757808B2 JPH0757808B2 JP2278755A JP27875590A JPH0757808B2 JP H0757808 B2 JPH0757808 B2 JP H0757808B2 JP 2278755 A JP2278755 A JP 2278755A JP 27875590 A JP27875590 A JP 27875590A JP H0757808 B2 JPH0757808 B2 JP H0757808B2
- Authority
- JP
- Japan
- Prior art keywords
- glass fiber
- inorganic filler
- resin
- woven fabric
- fiber non
- 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.)
- Expired - Lifetime
Links
Landscapes
- Nonwoven Fabrics (AREA)
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、積層板の基材として適したガラス繊維不織布
ならびにこのガラス繊維不織布を使用した積層板に関す
る。TECHNICAL FIELD The present invention relates to a glass fiber nonwoven fabric suitable as a base material for a laminate, and a laminate using the glass fiber nonwoven fabric.
従来の技術 ガラス繊維不織布を基材とする積層板は、この基材にエ
ポキシ樹脂などを含浸して、積層成形して得られ、打ち
抜き加工性がよく、電気絶縁用途に使用されている。ガ
ラス繊維不織布に要求される特性としては、積層成形の
工程で基材切れを起さない熱間強度、積層板の寸法安定
性を保てることなどである。2. Description of the Related Art A laminated plate having a glass fiber non-woven fabric as a base material is obtained by impregnating this base material with an epoxy resin or the like and laminate-molding it, which has good punching workability and is used for electrical insulation. The properties required of the glass fiber non-woven fabric are, for example, hot strength that does not cause breakage of the base material in the step of laminating and molding, and dimensional stability of the laminated plate.
従来用いられているガラス繊維不織布は、ガラス短繊維
を水中に分散させ抄紙機で抄造する湿式法で製造された
ものが殆どである。ガラス繊維自体では、互いに絡み合
う性質がなく熱融着させるのも困難であるため、バイン
ダを用いて繊維同士を結着している。バインダとして
は、アクリル酸樹脂、酢酸ビニル樹脂、エポキシ樹脂な
どが用いられ、これらバインダを、抄造したガラス繊維
不織布にスプレーする。Most of the conventionally used glass fiber non-woven fabrics are manufactured by a wet method in which short glass fibers are dispersed in water and made by a paper machine. Since the glass fibers themselves do not have the property of being entangled with each other and it is difficult to perform heat fusion, the fibers are bound together using a binder. As the binder, an acrylic acid resin, a vinyl acetate resin, an epoxy resin, or the like is used, and these binders are sprayed on the glass fiber nonwoven fabric that has been formed.
発明が解決しようとする課題 上記のように、従来のガラス繊維不織布は、ガラス短繊
維を樹脂系バインダで結着しているため、熱を受けると
バインダ樹脂が軟化してガラス繊維間の結着が緩む結
果、その強度が低下し、積層板の成形工程で基材切れが
起こりやすい。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, in the conventional glass fiber nonwoven fabric, since the glass short fibers are bound with the resin binder, the binder resin is softened when heat is applied to bind the glass fibers together. As a result, the strength is lowered, and the base material is likely to be cut off in the step of forming the laminated plate.
また、ガラス繊維不織布は、空隙が多く密度のバラツキ
も大きいので、これに樹脂を含浸した場合、空隙部が樹
脂リッチとなり、樹脂リッチとなる部分も、前記密度の
バラツキに起因して不均一に分布する。積層板は、加熱
処理を受けると樹脂が収縮し、一方、基材は、その収縮
を抑制する働きをする。しかし、ガラス繊維不織布基材
は、加熱処理によりバインダ樹脂が軟化し強度が低下し
てしまうので、樹脂の収縮を十分に抑制できず、しか
も、樹脂リッチとなる部分が不均一に分布しているの
で、熱収縮の程度も場所によって異なり、積層板のそり
や寸法変化が大きくなる。Further, since the glass fiber non-woven fabric has many voids and large variations in density, when impregnated with resin, the voids become resin-rich, and the portions that become resin-rich also become non-uniform due to the variations in density. To be distributed. When the laminated plate is subjected to heat treatment, the resin shrinks, while the base material functions to suppress the shrinkage. However, in the glass fiber non-woven fabric base material, the binder resin is softened and the strength is lowered by the heat treatment, so that the resin shrinkage cannot be sufficiently suppressed, and the resin rich portion is unevenly distributed. Therefore, the degree of heat shrinkage also differs depending on the location, and the warpage and dimensional change of the laminated plate increase.
本発明の課題は、熱間強度が大きく、密度のバラツキの
小さい、積層板用の基材として適したガラス繊維不織布
を提供することである。また、ガラス繊維不織布を使用
する基材の一部ないし全部として、そりや寸法変化の小
さい積層板を提供することである。An object of the present invention is to provide a glass fiber non-woven fabric having a high hot strength and a small variation in density, which is suitable as a substrate for a laminated plate. Another object of the present invention is to provide a laminated plate having a small warpage and small dimensional change as a part or the whole of a substrate using a glass fiber nonwoven fabric.
課題を解決するための手段 本発明に係るガラス繊維不織布は、アルキルセルロース
を含む無機充填材をガラス繊維不織布に保持させたもの
であり、その量を全体の50重量％以上としたことを特徴
とする。Means for Solving the Problems The glass fiber non-woven fabric according to the present invention is one in which an inorganic filler containing an alkyl cellulose is held in the glass fiber non-woven fabric, and the amount thereof is 50% by weight or more of the whole, To do.
無機充填材をガラス繊維不織布に保持させる方法は、次
の方法がよい。まず、アルキルセルロースとエポキシ樹
脂を有機溶媒に溶解して無機充填材を分散させた液を用
意する。この分散液にガラス繊維不織布を浸漬し乾燥す
る方法である。The method for holding the inorganic filler in the glass fiber nonwoven fabric is preferably the following method. First, a liquid in which an alkyl cellulose and an epoxy resin are dissolved in an organic solvent and an inorganic filler is dispersed is prepared. This is a method in which a glass fiber nonwoven fabric is dipped in this dispersion and dried.
また、本発明に係る積層板は、ガラス繊維不織布を基材
とし、これに樹脂を含浸して重ね、加熱加圧成形したも
のにおいて、ガラス繊維不織布基材が上記の無機充填材
を含有したものであることを特徴とする。The laminated plate according to the present invention has a glass fiber non-woven fabric as a base material, which is impregnated with a resin, is laminated by heating and pressing, and the glass fiber non-woven fabric base material contains the above-mentioned inorganic filler. Is characterized in that.
積層板の基材の層構成は、前記のガラス繊維不織布を芯
層とし、表面層に通常用いられているガラス繊維織布を
配置するものであってもよい。また、前記のガラス繊維
不織布を表面層とし、芯層に通常用いられている紙を配
置するものであってもよい。The layered structure of the base material of the laminated plate may be one in which the glass fiber nonwoven fabric described above is used as a core layer and a glass fiber woven fabric which is usually used as a surface layer is arranged. Further, the above-mentioned glass fiber nonwoven fabric may be used as a surface layer, and a paper usually used for the core layer may be arranged.
作用 本発明に係るガラス繊維不織布は、無機充填材を多量に
保持させていることにより、従来のガラス繊維不織布に
みられた空隙が少なくなり、密度が均一になる。アルキ
ルセルロースは、セルロースの水酸基（−OH）を、アル
キル基（−CnH2n+1）に置換したもので、その被膜形成
能力により、ガラス繊維不織布に保持させた無機充填材
が脱落するのを防止する作用をもつ。また、耐湿性に優
れ熱時の軟化温度も高いので（エチルセルロースは150
〜160℃）、高温においても無機充填材をガラス繊維不
織布に確実に保持させ、熱間強度を高めることができ
る。Action The glass fiber nonwoven fabric according to the present invention retains a large amount of the inorganic filler, so that the voids found in the conventional glass fiber nonwoven fabric are reduced and the density becomes uniform. Alkyl cellulose, a cellulose a hydroxyl group (-OH), a obtained by replacing an alkyl group (-C n H 2n + 1) , by its film-forming ability, the inorganic filler is retained in the glass fiber nonwoven fabric from falling Has the function of preventing In addition, it has excellent moisture resistance and a high softening temperature when heated (ethyl cellulose is
Up to 160 ° C.), the inorganic filler can be reliably retained in the glass fiber nonwoven fabric even at a high temperature, and the hot strength can be increased.
上記ガラス繊維不織布を基材とした積層板は、ガラス繊
維不織布の空隙が無機充填材で埋められており、熱間強
度も大きいことから、加熱処理による樹脂の収縮を抑え
ることができ、そりや寸法変化の小さい積層板とするこ
とができる。Laminated plate based on the glass fiber non-woven fabric, the voids of the glass fiber non-woven fabric is filled with an inorganic filler, since the hot strength is also large, it is possible to suppress the shrinkage of the resin due to heat treatment, warping It is possible to make a laminated plate having a small dimensional change.
ガラス繊維不織布に保持させる無機充填材は、その量が
少ないと積層板のそりや寸法変化を抑えることができな
い。If the amount of the inorganic filler held in the glass fiber non-woven fabric is small, it is impossible to suppress the warpage and dimensional change of the laminated plate.
上記のように、本発明に係るガラス繊維不織布は、多量
の無機充填材を脱落することなく保持させたものであ
る。無機充填材を多量に含む積層板とするときには、こ
のように基材には多量の無機充填材を保持させず、基材
に含浸させる樹脂ワニス中に無機充填材を配合しておい
たり、基材と樹脂ワニスの両方に無機充填材を入れてお
いて、見かけ上本発明に係る積層板と同量の無機充填材
を含む積層板とすることもできる。As described above, the glass fiber nonwoven fabric according to the present invention holds a large amount of inorganic filler without dropping off. When a laminate containing a large amount of inorganic filler is used, the base material does not retain a large amount of inorganic filler, and the resin varnish impregnated into the base material contains the inorganic filler, or It is also possible to put an inorganic filler in both the material and the resin varnish to make a laminate that apparently contains the same amount of the inorganic filler as the laminate according to the present invention.
しかし、樹脂ワニス中に無機充填材を配合してガラス繊
維不織布基材に含浸しても、その空隙には樹脂が選択的
に埋まり、空隙が無機充填材で埋まることはない。無機
充填材は基材の表面近くに偏在することになるので、積
層板のそりや寸法変化を抑える効果は小さい。また、後
者のように、ガラス繊維不織布基材に十分な量の無機充
填材を保持させておかず、樹脂ワニス中に配合した無機
充填材で補う場合も同様である。However, even if the resin varnish is mixed with the inorganic filler to impregnate the glass fiber non-woven fabric substrate, the resin is selectively filled in the voids and the voids are not filled with the inorganic filler. Since the inorganic filler is unevenly distributed near the surface of the base material, the effect of suppressing warpage and dimensional change of the laminate is small. The same applies to the latter case where the glass fiber non-woven fabric base material does not hold a sufficient amount of the inorganic filler but is supplemented with the inorganic filler compounded in the resin varnish.
実施例 ガラス繊維不織布に無機充填材を保持させるには、次の
ような方法を用いるとよい。アルキルセルロースとエポ
キシ樹脂を有機溶媒に溶解し、これに無機充填材を分散
させる。この分散液にガラス繊維不織布を浸漬し、乾燥
する方法である。アルキルセルロースは、分散液の中で
無機充填材の沈降を防止する作用ももっている。アルキ
ルセルロースは、無機充填材の重量に対して、0.5％〜
２％程度の量で用いるとき、ガラス繊維不織布の強度お
よび積層板の寸法安定性とも良好な結果が得られる。エ
ポキシ樹脂は、必ずしも必要ではないが、無機充填材の
重量に対して、15％以下の量で使用すれば、ガラス繊維
不織布に保持させた無機充填材の脱落が一層少なくな
り、取扱いが容易となる。Example In order to retain the inorganic filler in the glass fiber nonwoven fabric, the following method may be used. Alkyl cellulose and epoxy resin are dissolved in an organic solvent, and an inorganic filler is dispersed therein. In this method, a glass fiber non-woven fabric is dipped in this dispersion and dried. Alkyl cellulose also has the function of preventing the sedimentation of the inorganic filler in the dispersion. Alkyl cellulose is 0.5% to the weight of the inorganic filler.
When used in an amount of about 2%, good results are obtained for the strength of the glass fiber nonwoven fabric and the dimensional stability of the laminate. Epoxy resin is not always necessary, but if it is used in an amount of 15% or less based on the weight of the inorganic filler, the inorganic filler retained in the glass fiber non-woven fabric will not fall off much more easily and is easy to handle. Become.
ガラス繊維不織布に保持させる無機充填材の量は、多い
ほどよいが、92〜93重量％を越えると、保持させるため
の作業性が極端に悪くなり、これ以上の量では実質上保
持させることができなくなる。使用する無機充填材は、
水酸化アルミニウム、タルク（SiO2とMgOの混合物）等
である。The larger the amount of the inorganic filler to be retained in the glass fiber non-woven fabric, the better. However, if it exceeds 92 to 93% by weight, the workability for retaining it will be extremely poor. become unable. The inorganic filler used is
Aluminum hydroxide, talc (a mixture of SiO 2 and MgO), etc.
実施例１〜６、比較例１ 平均径９μ、長さ25mmのＥガラス短繊維を水中に分散
し、丸網抄紙機で抄紙したガラス繊維不織布（バイン
ダ：エポキシ樹脂、付着量10〜11重量％）を用意した。
第１表に示す配合の水酸化アルミニウム分散液に、前記
ガラス繊維不織布を浸漬し乾燥して、第４表に示すそれ
ぞれの量でガラス繊維不織布に水酸化アルミニウムを保
持させた。Examples 1 to 6 and Comparative Example 1 E glass short fibers having an average diameter of 9 μm and a length of 25 mm are dispersed in water, and a glass fiber non-woven fabric (binder: epoxy resin, adhesion amount: 10 to 11% by weight) produced by a round net paper machine. ) Was prepared.
The glass fiber non-woven fabric was dipped in an aluminum hydroxide dispersion liquid having the composition shown in Table 1 and dried to retain the aluminum hydroxide in the glass fiber non-woven fabric in the respective amounts shown in Table 4.
水酸化アルミニウムを保持させた各ガラス繊維不織布
に、第２表に示す配合の樹脂ワニスを含浸乾燥してプリ
プレグ（水酸化アルミニウムを除いた樹脂含有量92重量
％）とし、これを所定枚数重ね、両表面には銅箔を載置
して、温度160℃、圧力100kg/cm2の条件で30分間加熱加
圧成形して、1.6mm厚さの銅張り積層板とした。Each glass fiber non-woven fabric holding aluminum hydroxide was impregnated with a resin varnish having the composition shown in Table 2 and dried to form a prepreg (resin content excluding aluminum hydroxide: 92% by weight). Copper foil was placed on both surfaces, and heat and pressure molding was performed for 30 minutes under conditions of a temperature of 160 ° C. and a pressure of 100 kg / cm 2 to obtain a copper-clad laminate having a thickness of 1.6 mm.
その特性をガラス繊維不織布基材の特性と共に第４表に
示す。The properties are shown in Table 4 together with the properties of the glass fiber non-woven fabric substrate.
従来例１ アクリル酸樹脂をバインダとしたガラス繊維不織布基材
（バインダ付着量15重量％）に、第３表の配合の樹脂ワ
ニスを含浸乾燥してプリプレグ（水酸化アルミニウムを
除いた樹脂含有量92重量％）とし、以下、実施例１と同
様にして1.6mm厚さの銅張り積層板とした。 Conventional Example 1 A glass fiber non-woven fabric base material (binder adhesion amount 15% by weight) using an acrylic resin as a binder is impregnated with a resin varnish having the composition shown in Table 3 and dried to prepare a prepreg (resin content excluding aluminum hydroxide 92 % By weight), and a copper-clad laminate having a thickness of 1.6 mm was prepared in the same manner as in Example 1.
従来例２ エポキシ樹脂をバインダとしたガラス繊維不織布基材
（バインダ付着量10〜11重量％）に、第３表の配合の樹
脂ワニスを含浸乾燥してプリプレグ（水酸化アルミニウ
ムを除いた樹脂含有量92重量％）とし、以下、実施例１
と同様にして1.6mm厚さの銅張り積層板とした。Conventional Example 2 A glass fiber non-woven fabric base material (binder adhesion amount: 10 to 11% by weight) using an epoxy resin as a binder is impregnated with a resin varnish of the composition shown in Table 3 and dried to prepare a prepreg (resin content excluding aluminum hydroxide). 92% by weight), and in Example 1 below.
In the same manner as described above, a copper-clad laminate having a thickness of 1.6 mm was prepared.
実施例７ 実施例３におけるプリプレグを芯層とし、第２表の樹脂
ワニスをガラス繊維織布基材に含浸乾燥して得たプリプ
レグ（樹脂含有量45重量％）１枚を両表面層として、以
下、実施例１と同様にして1.6mm厚さの銅張り積層板と
した。 Example 7 The prepreg in Example 3 was used as the core layer, and one prepreg (resin content 45% by weight) obtained by impregnating and drying the resin varnish of Table 2 in the glass fiber woven fabric substrate was used as both surface layers. Thereafter, a copper-clad laminate having a thickness of 1.6 mm was prepared in the same manner as in Example 1.
従来例３ 従来例２におけるプリプレグを芯層として、以下、実施
例７と同様にして1.6mm厚さの銅張り積層板とした。Conventional Example 3 Using the prepreg of Conventional Example 2 as a core layer, a copper clad laminate having a thickness of 1.6 mm was prepared in the same manner as in Example 7.
積層板の特性を第５表に示す。The properties of the laminate are shown in Table 5.
実施例８〜10 第２表の樹脂ワニスをクラフト紙に含浸したプリプレグ
（樹脂含有量48重量％）を芯層とし、実施例１〜３にお
けるプリプレグ１枚をそれぞれ両表面層として、以下、
実施例１と同様にして1.6mm厚さの銅張り積層板とし
た。 Examples 8 to 10 A prepreg (resin content of 48% by weight) impregnated with a resin varnish shown in Table 2 was used as a core layer, and one prepreg in Examples 1 to 3 was used as both surface layers.
A copper-clad laminate having a thickness of 1.6 mm was prepared in the same manner as in Example 1.
従来例４ 実施例８におけるクラフト紙プリプレグだけを使用し、
以下、実施例１と同様にして1.6mm厚さの銅張り積層板
とした。Conventional Example 4 Using only the kraft paper prepreg in Example 8,
Thereafter, a copper-clad laminate having a thickness of 1.6 mm was prepared in the same manner as in Example 1.
積層板の特性を第６表に示す。The properties of the laminate are shown in Table 6.
発明の効果 第４表、第５表、第６表から明かなように、アルキルセ
ルロースを含み無機充填材を多量に保持させたガラス繊
維不織布は、熱間強度が大きく密度も均一である。これ
を基材とし樹脂を含浸して成形した積層板は、ガラス繊
維不織布の空隙が無機充填材で埋められており、樹脂リ
ッチとならないので加熱処理をしたときの樹脂の収縮が
小さく、しかも、基材の熱間強度が大きいので樹脂の収
縮を十分に抑えることができ、そりや寸法変化が小さ
い。 EFFECTS OF THE INVENTION As is clear from Tables 4, 5, and 6, a glass fiber nonwoven fabric containing alkyl cellulose and having a large amount of inorganic filler retained therein has a high hot strength and a uniform density. A laminated board formed by impregnating this with a resin as a base material, the voids of the glass fiber non-woven fabric are filled with an inorganic filler, and since the resin does not become rich, the shrinkage of the resin when heat-treated is small, and Since the hot strength of the base material is high, the shrinkage of the resin can be sufficiently suppressed, and the warpage and dimensional change are small.
このような効果は、上記のガラス繊維不織布を基材とす
ることにより初めて達成できるものであり、樹脂ワニス
中に無機充填材を配合しておくなどして積層板を製造
し、見かけ上本発明に係る積層板と無機充填材の含有量
を同じにしても、同様の効果を得ることができない。Such an effect can be achieved for the first time by using the above-mentioned glass fiber non-woven fabric as a base material, and a laminated board is manufactured by mixing an inorganic filler in a resin varnish, etc. Even if the content of the inorganic filler is the same as that of the laminate according to (1), the same effect cannot be obtained.
尚、本発明に係るガラス繊維不織布に表面層としてガラ
ス繊維織布を組合せた積層板は、積層板のそり、寸法変
化を一層小さくできるし、芯層として紙を組合せた積層
板は、同様にそり、寸法変化を一層小さくできるととも
に、紙基材の積層板より耐湿絶縁性が優れている。Incidentally, the laminated plate in which the glass fiber non-woven fabric according to the present invention is combined with the glass fiber woven fabric as the surface layer, the warpage of the laminated plate, the dimensional change can be further reduced, and the laminated plate in which paper is combined as the core layer is the same. The warpage and dimensional change can be further reduced, and the moisture-proof insulation is superior to the paper-based laminate.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｄ０４Ｈ 1/64 Ａ 7199−3Ｂ // Ｂ２９Ｋ 103:04 105:06 Ｂ２９Ｌ 9:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location D04H 1/64 A 7199-3B // B29K 103: 04 105: 06 B29L 9:00
Claims (5)
ラス繊維不織布に保持させて、その量を全体の50重量％
以上としたガラス繊維不織布。1. An inorganic filler containing alkyl cellulose is held in a glass fiber non-woven fabric, and the amount thereof is 50% by weight of the whole.
The above glass fiber nonwoven fabric.
溶媒に溶解して無機充填材を分散させた液を用意し、こ
の分散液にガラス繊維不織布を浸漬し乾燥して、無機充
填材の含有量を全体の50重量％以上とすることを特徴と
するガラス繊維不織布の製造法。2. A solution in which an alkyl cellulose and an epoxy resin are dissolved in an organic solvent to disperse an inorganic filler is prepared, and a glass fiber nonwoven fabric is immersed in this dispersion and dried to adjust the content of the inorganic filler. A method for producing a glass fiber non-woven fabric, which comprises 50% by weight or more of the whole.
加熱加圧成形した積層板において、 ガラス繊維不織布が、アルキルセルロースを含む無機充
填材をガラス繊維不織布に保持させてその量を50重量％
以上としたものであることを特徴とする積層板。3. A laminated plate obtained by stacking resin-impregnated glass fiber non-woven fabrics under heat and pressure, wherein the glass fiber non-woven fabrics hold an inorganic filler containing alkyl cellulose on the glass fiber non-woven fabrics, and the amount thereof is 50% by weight.
A laminated board characterized by the above.
層に、樹脂を含浸したガラス繊維織布の層を表面層にし
て加熱加圧成形した積層板であって、 ガラス繊維不織布が、アルキルセルロースを含む無機充
填材をガラス繊維不織布に保持させてその量を50重量％
以上としたものであることを特徴とする積層板。4. A laminate obtained by heat-pressing a resin-impregnated glass fiber nonwoven fabric layer as a core layer and a resin-impregnated glass fiber woven fabric layer as a surface layer, wherein the glass fiber nonwoven fabric comprises: An inorganic filler containing alkyl cellulose is held in a glass fiber non-woven fabric and its amount is 50% by weight.
A laminated board characterized by the above.
浸したガラス繊維不織布の層を表面層にして加熱加圧成
形した積層板であって、 ガラス繊維不織布が、アルキルセルロースを含む無機充
填材をガラス繊維不織布に保持させてその量を50重量％
以上としたものであることを特徴とする積層板。5. A laminate obtained by heat-pressing a resin-impregnated paper layer as a core layer and a resin-impregnated glass fiber nonwoven fabric layer as a surface layer, wherein the glass fiber nonwoven fabric comprises alkyl cellulose. Inorganic filler containing is held in glass fiber non-woven fabric and its amount is 50% by weight
A laminated board characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2278755A JPH0757808B2 (en) | 1990-04-18 | 1990-10-17 | Glass fiber non-woven fabric, manufacturing method thereof, and laminated plate |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10215190 | 1990-04-18 | ||
| JP2-166385 | 1990-06-25 | ||
| JP16638590 | 1990-06-25 | ||
| JP2-102151 | 1990-06-25 | ||
| JP2278755A JPH0757808B2 (en) | 1990-04-18 | 1990-10-17 | Glass fiber non-woven fabric, manufacturing method thereof, and laminated plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04153229A JPH04153229A (en) | 1992-05-26 |
| JPH0757808B2 true JPH0757808B2 (en) | 1995-06-21 |
Family
ID=27309627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2278755A Expired - Lifetime JPH0757808B2 (en) | 1990-04-18 | 1990-10-17 | Glass fiber non-woven fabric, manufacturing method thereof, and laminated plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757808B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002088626A (en) * | 2000-09-20 | 2002-03-27 | Shin Kobe Electric Mach Co Ltd | Glass fiber nonwoven fabric for laminated sheet and composite laminated sheet |
| JP2008204945A (en) * | 2007-01-23 | 2008-09-04 | Japan Vilene Co Ltd | Gas diffusion electrode substrate, gas diffusion electrode, its manufacturing method, and fuel cell |
-
1990
- 1990-10-17 JP JP2278755A patent/JPH0757808B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04153229A (en) | 1992-05-26 |
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