JP2001019780A - Binder for electrically insulating non-woven fabric and electrically insulating non-woven fabric - Google Patents
Binder for electrically insulating non-woven fabric and electrically insulating non-woven fabricInfo
- Publication number
- JP2001019780A JP2001019780A JP19408699A JP19408699A JP2001019780A JP 2001019780 A JP2001019780 A JP 2001019780A JP 19408699 A JP19408699 A JP 19408699A JP 19408699 A JP19408699 A JP 19408699A JP 2001019780 A JP2001019780 A JP 2001019780A
- Authority
- JP
- Japan
- Prior art keywords
- binder
- nonwoven fabric
- electrically insulating
- woven fabric
- acid ester
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はプリント配線板をは
じめとする積層板に使用される電気絶縁性不織布用バイ
ンダーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binder for an electrically insulating nonwoven fabric used for a laminate such as a printed wiring board.
【０００２】[0002]
【従来の技術】現在各種プリント配線板用基材シートと
して、ガラスペーパーやアラミドペーパー等の各種湿式
不織布が使用されている。不織布はクロスと比べて生産
性が高い反面、カットファイバーを使用するために、シ
−トに十分な強度を付与させる必要がある。通常は熱硬
化性樹脂エマルジョンバインダーが塗布されている。2. Description of the Related Art Various wet nonwoven fabrics such as glass paper and aramid paper are currently used as base sheets for various printed wiring boards. Nonwoven fabrics have higher productivity than cloths, but the sheets must be given sufficient strength to use cut fibers. Usually, a thermosetting resin emulsion binder is applied.
【０００３】プリント配線板を製造する際には、この不
織布にエポキシ樹脂等の熱硬化性樹脂含浸後に、熱プレ
ス成形を行う。この熱硬化性樹脂含浸は、アセトン、２
−ブタノン等の有機溶媒を使用した樹脂ワニス中に含浸
されるため、ワニス含浸工程中に断紙が発生しないよう
に、製造上の観点から一定の耐溶剤強度が必要とされて
いる。しかしながら最近の絶縁層の薄物化に伴い、40ｇ
／ｍ2以下の電気絶縁性不織布においてはこの耐溶剤強
度を満たす事が困難であった。When manufacturing a printed wiring board, hot press molding is performed after impregnating the nonwoven fabric with a thermosetting resin such as an epoxy resin. This thermosetting resin impregnation is carried out with acetone, 2
-Since it is impregnated into a resin varnish using an organic solvent such as butanone, a certain solvent resistance is required from the viewpoint of production so that paper breakage does not occur during the varnish impregnation step. However, with the recent thinning of insulation layers, 40g
/ M 2 or less, it was difficult to satisfy the solvent resistance.
【０００４】従来これらの用途に使用されている熱硬化
性樹脂バインダーは成膜性が悪く、柔軟性に欠けてい
た。そのためバインダー塗膜にクラックが入りやすく、
溶剤が繊維界面に浸透しやすいので耐溶剤強度が劣って
いた。そこで耐溶剤強度を満たすためには、ウエブの交
点を熱硬化性樹脂エマルジョンバインダーで完全に被覆
し、（１）乾燥後に造膜性があること、（２）樹脂硬化
後においてもクラック等の亀裂が少ない均一な膜が形成
されていることが必要であった。しかしながら従来の熱
硬化性樹脂エマルジョンバインダーは、加熱乾燥時ない
しキュア−過程で硬化収縮が起き、バインダ−塗膜に微
視的なクラック等が発生することが避けられなかった。Conventionally, thermosetting resin binders used for these applications have poor film-forming properties and lack flexibility. As a result, cracks easily enter the binder coating film,
Since the solvent easily penetrated into the fiber interface, the solvent resistance was poor. Therefore, in order to satisfy the solvent resistance, the intersection of the web is completely covered with a thermosetting resin emulsion binder, and (1) the film is formed after drying, and (2) cracks such as cracks even after the resin is cured. It was necessary to form a uniform film with little. However, in the conventional thermosetting resin emulsion binder, curing shrinkage occurs during drying by heating or during the curing process, and it is inevitable that microscopic cracks and the like occur in the binder coating film.
【０００５】また積層板の耐熱性向上に伴い、不織布に
塗布される熱硬化性樹脂バインダ−においても耐熱性、
特にガラス転移温度（Ｔｇ）の高い熱硬化性樹脂バイン
ダ−の要望が高い。通常は熱硬化性樹脂バインダ−の架
橋密度を高めて半田耐熱性等の熱物性を向上する手法が
一般的であった。しかしながらこのような熱硬化性樹脂
バインダ−は弾性率が高く、一般に不織布を製造する場
合の乾燥条件を勘案した場合、エマルジョン粒子融着時
間が短い為、繊維交点で形成したバインダ−塗膜に亀裂
を生じる結果となり、樹脂のＴｇをあげることは更に耐
溶剤強度に悪い影響を及ぼしていた。[0005] With the improvement in heat resistance of the laminate, the thermosetting resin binder applied to the nonwoven fabric also has heat resistance,
In particular, there is a high demand for a thermosetting resin binder having a high glass transition temperature (Tg). Usually, a method of increasing the crosslink density of a thermosetting resin binder to improve thermophysical properties such as solder heat resistance has been generally used. However, such a thermosetting resin binder has a high modulus of elasticity, and when the drying conditions for manufacturing a nonwoven fabric are generally taken into consideration, the time required for fusing the emulsion particles is short. And increasing the Tg of the resin further adversely affected the solvent resistance.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は不織布
の乾燥ならびに熱硬化条件を変更する事なく、薄物基材
で問題とされていた耐溶剤強度を改善する事にある。具
体的には熱硬化性樹脂バインダ−の造膜性を向上させる
こと、特に製品化が困難であった耐熱性の高い熱硬化性
樹脂バインダ−を使用しても、優れた耐溶剤強度を発揮
する電気絶縁性不織布用バインダーおよびそのバインダ
ーを使用した電気絶縁性不織布を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to improve the solvent resistance, which has been a problem in thin substrates, without changing the drying and heat curing conditions of the nonwoven fabric. Specifically, it improves the film forming properties of the thermosetting resin binder, and exhibits excellent solvent strength even when using a thermosetting resin binder with high heat resistance, which was difficult to commercialize. To provide a binder for an electrically insulating nonwoven fabric and an electrically insulating nonwoven fabric using the binder.
【０００７】[0007]
【課題を解決するための手段】上記の問題を解決するた
めに、本発明の第１の発明は、熱硬化性樹脂エマルジョ
ン１００部に対して二塩基酸エステルを１０〜１５０部
添加することを特徴とする電気絶縁性不織布用バインダ
ーに関するものである。本発明の第２の発明は、上記第
１の発明に記載された電気絶縁性不織布用バインダーを
不織布重量に対して５〜３０重量％含む電気絶縁性不織
布に関するものである。In order to solve the above problems, the first invention of the present invention is to add 10 to 150 parts of a dibasic acid ester to 100 parts of a thermosetting resin emulsion. The present invention relates to a characteristic binder for an electrically insulating nonwoven fabric. The second invention of the present invention relates to an electrically insulating nonwoven fabric containing the binder for an electrically insulating nonwoven fabric described in the first invention in an amount of 5 to 30% by weight based on the weight of the nonwoven fabric.
【０００８】[0008]
【発明の実施の形態】以下本発明について説明する。本
発明に使用される二塩基酸エステルは水よりも沸点が高
く、樹脂溶解性が高く、電気絶縁性が高いことが特徴で
ある。そのため蒸発スピードをゆるやかにし、水が完全
に蒸発した後も可塑性を持ち、エマルジョン粒子を完全
に溶解しながら完全な皮膜を形成するものである。また
少量残存した場合においてもイオン性もなく、電気絶縁
性が高いため障害が極めて少ない。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below. The dibasic acid ester used in the present invention is characterized by having a higher boiling point than water, high resin solubility, and high electric insulation. Therefore, the evaporation speed is slowed, the plasticity is maintained even after the water is completely evaporated, and a complete film is formed while completely dissolving the emulsion particles. Further, even when a small amount remains, there is no ionicity and the electrical insulation is high, so that there is very little trouble.
【０００９】本発明の二塩基酸エステルの種類としては
アジピン酸エステル、グルタル酸エステル、コハク酸エ
ステル、マロン酸エステル等またはそれらの混合物が使
用される。なかでもアジピン酸ジメチル、グルタル酸ジ
メチル、コハク酸ジメチルなどが好ましい。熱硬化性樹
脂エマルジョンと二塩基酸エステルの割合は、熱硬化性
樹脂エマルジョン１００部に対して二塩基酸エステル１
０〜１５０部である。二塩基酸エステルの量が１０部に
満たないと熱硬化性エマルジョンの可溶化が不十分で成
膜性に劣る。１５０部を超えると塗膜中に二塩基酸エス
テルが残存して半田耐熱性が低下し、いずれの場合も本
発明の目的を達することが出来ない。As the dibasic acid ester of the present invention, adipic acid ester, glutaric acid ester, succinic acid ester, malonic acid ester and the like or a mixture thereof are used. Among them, dimethyl adipate, dimethyl glutarate, dimethyl succinate and the like are preferable. The ratio of the thermosetting resin emulsion to the dibasic acid ester is as follows.
0 to 150 parts. If the amount of the dibasic acid ester is less than 10 parts, the solubilization of the thermosetting emulsion is insufficient and the film formability is poor. If the amount exceeds 150 parts, the dibasic acid ester remains in the coating film and the solder heat resistance is reduced, and in any case, the object of the present invention cannot be achieved.
【００１０】本発明においては熱硬化性樹脂エマルジョ
ンとしてはエポキシ樹脂、アクリル樹脂、フェノール樹
脂、不飽和ポリエステル樹脂などが使用可能である。な
かでも造膜性が乏しい樹脂、弾性率が高い樹脂において
は、二塩基酸エステルの使用による成膜性向上の効果が
特に顕著である。不織布に添加されるバインダー量は、
全不織布重量に対して５〜３０重量％である。５重量％
未満の場合は繊維交点の被覆率が低く、必要な強度が得
られない。また３０重量％を超える場合は交点以外にバ
インダーが付着し、強度上昇がレベルオフする。本発明
において不織布にバインダーを含ませるには、塗布、散
布、どぶ漬け等公知の方法を用いることができる。In the present invention, epoxy resin, acrylic resin, phenol resin, unsaturated polyester resin and the like can be used as the thermosetting resin emulsion. In particular, in the case of a resin having poor film-forming properties and a resin having a high elastic modulus, the effect of improving the film-forming properties by using a dibasic acid ester is particularly remarkable. The amount of binder added to the nonwoven fabric is
It is 5 to 30% by weight based on the total weight of the nonwoven fabric. 5% by weight
If it is less than 1, the coverage at the fiber intersection is low, and the required strength cannot be obtained. If the content exceeds 30% by weight, the binder is attached to the portions other than the intersections, and the increase in strength is leveled off. In order to incorporate the binder into the nonwoven fabric in the present invention, a known method such as coating, spraying, and soaking may be used.
【００１１】不織布を構成する繊維はガラス繊維、シリ
カアルミナ繊維などの無機繊維やアラミド繊維、ポリエ
ステル繊維等の有機繊維などがあるが、導電性繊維以外
であれば特に限定するものではない。The fibers constituting the nonwoven fabric include inorganic fibers such as glass fibers and silica-alumina fibers, and organic fibers such as aramid fibers and polyester fibers, but are not particularly limited as long as they are other than conductive fibers.
【００１２】本発明における不織布は、シートの均一性
から考えて湿式抄紙法によって製造することが望まし
い。湿式抄紙法は繊維を水に分散し、スラリーにしてか
らシート化する方法である。その方法に使用する機械と
しては、例えば傾斜金網抄紙機、円網抄紙機、長網抄紙
機などがある。The nonwoven fabric of the present invention is desirably produced by a wet papermaking method in view of the uniformity of the sheet. The wet papermaking method is a method in which fibers are dispersed in water, turned into a slurry, and formed into a sheet. Machines used in the method include, for example, an inclined wire mesh paper machine, a circular net paper machine, and a fourdrinier paper machine.
【００１３】[0013]
【実施例】本発明を実施例及び比較例により更に詳細に
説明するが、本発明の内容は実施例に限られるものでは
ない。（以下の「部」及び「％」は「重量部」、「重量
％」である。）EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the content of the present invention is not limited to Examples. (The following “parts” and “%” are “parts by weight” and “% by weight”.)
【００１４】＜実施例１＞ （バインダー液の調製）電気絶縁性不織布用バインダー
液として、３５０ｇの水にアクリル樹脂エマルジョン
（大日本インキ化学工業製ボンコートＡＮ−１８０Ｈ、
固形分５０％）を１００ｇ添加し撹拌後、二塩基酸エス
テル５０ｇ（アジピン酸ジメチル１７％、グルタル酸ジ
メチル６６％、コハク酸ジメチル１７％の混合物）を加
えて調成した。 （シート作成）分散剤として、ポリエチレンオキサイド
を濃度５０ｍｇ／ｌで溶解した水溶液に、ガラス繊維
（日本電気硝子繊維（株）製ＣＳ１０ＪＡＧＰ１９５、
繊維径９μｍ、繊維長１０ｍｍ）を０．５重量％になる
ように加えて分散した。この分散液を抄紙し、ウエット
シート形成後、ガラス繊維９０部に対して電気絶縁性不
織布用バインダーを１０部散布して加え、米坪２５ｇ／
ｍ2のガラス繊維不織布を得た。シートの乾燥は１６０
℃、３０分処理を行なった。不織布の引張強度はＪＩＳ
−Ｐ８１１３に基づいて測定した。また耐溶剤強度はア
セトン１０分浸漬後にＪＩＳ−Ｐ８１１３に基づいて測
定した。 （積層板作成）エポキシ樹脂ワニスとして、エピコート
１００１（油化シェルエポキシ）１００部に対して硬化
剤としてジシアンジアミド４部添加したワニスを基材シ
ートに含浸乾燥し、その後１７０℃ ６０分間プレス成
形してサンプルピースを作成した。積層板の電気絶縁
性、半田耐熱性はＪＩＳ−Ｃ−６４７１に基づいて測定
を行った。結果を表に示す。Example 1 (Preparation of Binder Solution) As a binder solution for an electrically insulating nonwoven fabric, an acrylic resin emulsion (Boncoat AN-180H manufactured by Dainippon Ink and Chemicals, Inc.) was used in 350 g of water.
After adding and stirring 100 g of a solid content (50%), 50 g of a dibasic acid ester (a mixture of 17% dimethyl adipate, 66% dimethyl glutarate, and 17% dimethyl succinate) was added. (Sheet preparation) A glass fiber (CS10JAGP195, manufactured by Nippon Electric Glass Fiber Co., Ltd.) was added to an aqueous solution in which polyethylene oxide was dissolved at a concentration of 50 mg / l as a dispersant.
A fiber diameter of 9 μm and a fiber length of 10 mm) were added and dispersed so as to be 0.5% by weight. This dispersion was paper-formed and after forming a wet sheet, 90 parts of glass fiber was sprinkled with 10 parts of a binder for an electrically insulating nonwoven fabric and added.
An m 2 glass fiber nonwoven fabric was obtained. Sheet drying is 160
The treatment was performed at 30 ° C. for 30 minutes. JIS for tensile strength of non-woven fabric
-Measured based on P8113. The solvent resistance was measured based on JIS-P8113 after immersion in acetone for 10 minutes. (Preparation of Laminated Board) A varnish obtained by adding 4 parts of dicyandiamide as a curing agent to 100 parts of Epicoat 1001 (oiled shell epoxy) as an epoxy resin varnish was impregnated and dried in a base sheet, and then press-formed at 170 ° C. for 60 minutes. A sample piece was created. The electrical insulation property and solder heat resistance of the laminate were measured based on JIS-C-6471. The results are shown in the table.
【００１５】＜比較例１＞実施例１と同様にガラス繊維
のウエットシートを形成した後、バインダ−を添加して
ガラス繊維不織布を作成した。バインダーは二塩基酸エ
ステルを添加しないこと以外は実施例１と同じものであ
った。また得られたガラス繊維不織布を用いて実施例１
と同様にして積層板を作成した。シート物性並びに積層
板特性を実施例１と同様にして評価した。結果を表に示
す。Comparative Example 1 A glass fiber wet sheet was formed in the same manner as in Example 1, and then a binder was added to form a glass fiber nonwoven fabric. The binder was the same as in Example 1 except that no dibasic acid ester was added. Example 1 using the obtained glass fiber nonwoven fabric
A laminate was prepared in the same manner as described above. Sheet physical properties and laminate properties were evaluated in the same manner as in Example 1. The results are shown in the table.
【００１６】＜比較例２＞電気絶縁性不織布用バインダ
ー液として、３００ｇの水にアクリル樹脂エマルジョン
（大日本インキ化学工業製ボンコートＡＮ−１８０Ｈ、
固形分５０％）を１００ｇ添加し撹拌後、二塩基酸エス
テル１００ｇ（アジピン酸ジメチル１７％、グルタル酸
ジメチル６６％、コハク酸ジメチル１７％の混合物）を
加えて調成した。以下実施例１と同様にシート及び積層
板を作成し、実施例１と同様にしてシート物性並びに積
層板特性を評価した。結果を表に示す。Comparative Example 2 An acrylic resin emulsion (Boncoat AN-180H manufactured by Dainippon Ink and Chemicals, Inc.) was used as a binder liquid for an electrically insulating nonwoven fabric in 300 g of water.
100 g of a solid content (50%) was added and stirred, and then 100 g of a dibasic acid ester (a mixture of dimethyl adipate 17%, dimethyl glutarate 66%, and dimethyl succinate 17%) was added. Thereafter, a sheet and a laminate were prepared in the same manner as in Example 1, and sheet physical properties and laminate properties were evaluated in the same manner as in Example 1. The results are shown in the table.
【００１７】＜実施例２＞電気絶縁性不織布用バインダ
ー液として、２４５ｇの水に、エポキシ樹脂エマルジョ
ン（大日本インキ化学工業製ディックファインＥＮ−０
０２Ｌ、固形分２０％）を２５０ｇ添加し撹拌後、二塩
基酸エステル５ｇ（グルタル酸ジメチル１００％）を加
えて調成した。分散剤として、ポリエチレンオキサイド
を濃度５０ｍｇ／ｌで溶解した水溶液に、アラミド繊維
（テクノーラ；繊維径１３μｍ、繊維長３ｍｍ、帝人
製）を０．５重量％になるように加えて分散した。この
分散液を抄紙し、ウエットシート形成後、アラミド繊維
９０部に対して電気絶縁性不織布用バインダーを１０部
散布して加え、米坪２５ｇ／ｍ2のアラミド繊維不織布
を得た。また得られたアラミド繊維不織布を用いて実施
例１と同様にして積層板を作成した。シート物性並びに
積層板特性を実施例１と同様にして評価した。結果を表
に示す。Example 2 An epoxy resin emulsion (Dick Fine EN-0 manufactured by Dainippon Ink and Chemicals, Inc.) was added to 245 g of water as a binder liquid for an electrically insulating nonwoven fabric.
(0.2 L, solid content: 20%) was added and stirred, and then the mixture was prepared by adding 5 g of dibasic acid ester (100% of dimethyl glutarate). Aramid fiber (Technola; fiber diameter: 13 μm, fiber length: 3 mm, manufactured by Teijin) was added to an aqueous solution in which polyethylene oxide was dissolved at a concentration of 50 mg / l as a dispersant so as to be 0.5% by weight and dispersed. This dispersion was paper-formed, and after forming a wet sheet, 10 parts of a binder for an electrically insulating nonwoven fabric was sprayed and added to 90 parts of aramid fibers to obtain an aramid fiber nonwoven fabric of 25 g / m 2 in rice tsubo. A laminate was prepared in the same manner as in Example 1 using the obtained aramid fiber nonwoven fabric. Sheet properties and laminate properties were evaluated in the same manner as in Example 1. The results are shown in the table.
【００１８】＜実施例３＞電気絶縁性不織布用バインダ
ー液として、１７５ｇの水に、エポキシ樹脂エマルジョ
ン（大日本インキ化学工業製ディックファインＥＮ−０
０２Ｌ、固形分２０％）を２５０ｇ添加し撹拌後、二塩
基酸エステル７５ｇ（グルタル酸ジメチル１００％）を
加えて調成した。この電気絶縁性不織布用バインダー液
を用い、実施例２同様にしてアラミド繊維不織布を製造
した。また得られたアラミド繊維不織布を用いて実施例
１と同様にして積層板を作成した。シート物性並びに積
層板特性を実施例１と同様にして評価した。結果を表に
示す。Example 3 An epoxy resin emulsion (Dick Fine EN-0 manufactured by Dainippon Ink and Chemicals, Inc.) was added to 175 g of water as a binder liquid for an electrically insulating nonwoven fabric.
(0.2 L, solid content: 20%) was added and stirred, and then the mixture was prepared by adding 75 g of dibasic acid ester (100% of dimethyl glutarate). Using this binder solution for an electrically insulating nonwoven fabric, an aramid fiber nonwoven fabric was produced in the same manner as in Example 2. Further, a laminate was prepared in the same manner as in Example 1 using the obtained aramid fiber nonwoven fabric. Sheet physical properties and laminate properties were evaluated in the same manner as in Example 1. The results are shown in the table.
【００１９】＜比較例３＞実施例２と同様にアラミド繊
維のウエットシートを形成した後、バインダ−を添加し
てガラス繊維不織布を作成した。バインダーは二塩基酸
エステルを添加しないこと以外は実施例２と同じもので
あった。また得られたガラス繊維不織布を用いて実施例
２と同様にして積層板を作成した。シート物性並びに積
層板特性を実施例１と同様にして評価した。結果を表に
示す。Comparative Example 3 A wet sheet of aramid fibers was formed in the same manner as in Example 2, and a binder was added to prepare a glass fiber nonwoven fabric. The binder was the same as in Example 2 except that no dibasic acid ester was added. A laminate was prepared in the same manner as in Example 2 using the obtained glass fiber nonwoven fabric. Sheet physical properties and laminate properties were evaluated in the same manner as in Example 1. The results are shown in the table.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【発明の効果】本発明によれば、低米坪の不織布製造時
に問題とされている耐溶剤強度を改善し、電気絶縁性の
優れた不織布を製造するためのバインダー、ならびにそ
の不織布の提供が可能になる。According to the present invention, it is possible to provide a binder for producing a nonwoven fabric having an excellent electrical insulation property by improving the solvent resistance, which is a problem in producing a nonwoven fabric having a low U.S.A. Will be possible.
Claims (2)
量重量部；以下同）に対して二塩基酸エステルを１０〜
１５０部添加することを特徴とする電気絶縁性不織布用
バインダー。1. A dibasic acid ester is added to 10 parts of a thermosetting resin emulsion (part by weight of solid content; the same applies hereinafter) in an amount of 10 to 10 parts.
A binder for an electrically insulating nonwoven fabric, which is added in an amount of 150 parts.
に対して５〜３０重量％含まれている電気絶縁性不織
布。2. An electrically insulating nonwoven fabric containing the binder according to claim 1 in an amount of 5 to 30% by weight based on the weight of the nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19408699A JP2001019780A (en) | 1999-07-08 | 1999-07-08 | Binder for electrically insulating non-woven fabric and electrically insulating non-woven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19408699A JP2001019780A (en) | 1999-07-08 | 1999-07-08 | Binder for electrically insulating non-woven fabric and electrically insulating non-woven fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001019780A true JP2001019780A (en) | 2001-01-23 |
Family
ID=16318733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19408699A Pending JP2001019780A (en) | 1999-07-08 | 1999-07-08 | Binder for electrically insulating non-woven fabric and electrically insulating non-woven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001019780A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003013350A (en) * | 2001-06-27 | 2003-01-15 | Mitsubishi Pencil Co Ltd | Method for producing ink-introducing member made from fiber bundle |
| JPWO2008108484A1 (en) * | 2007-03-05 | 2010-06-17 | 帝人株式会社 | Boron nitride fiber paper and method for producing the same |
-
1999
- 1999-07-08 JP JP19408699A patent/JP2001019780A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003013350A (en) * | 2001-06-27 | 2003-01-15 | Mitsubishi Pencil Co Ltd | Method for producing ink-introducing member made from fiber bundle |
| JPWO2008108484A1 (en) * | 2007-03-05 | 2010-06-17 | 帝人株式会社 | Boron nitride fiber paper and method for producing the same |
| JP5099117B2 (en) * | 2007-03-05 | 2012-12-12 | 帝人株式会社 | Method for producing boron nitride fiber paper |
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