JP2003016847A - Self-fusing insulated electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal bonding type self-fusing insulated electric wire having an excellent adhesion property in a low temperature and high heat resistance, with the residual solvent amount remarkably reduced in a coating film. SOLUTION: This self-fusing insulated electric wire is provided by applying, to a conductor directly or via other insulating coating film, a fusing coating material prepared by blending 20-70 pts.wt. of low molecular weight bisphenol A type epoxy resin having 1,000-4,000 of molecular weight, and 5-50 pts.wt. of phenol resin to 100 pts.wt. of high molecular weight bisphenol A type epoxy resin having 10,000-30,000 of molecular weight, then dissolving the blend in a highly volatile organic solvent of low boiling point, for example, a mixed solvent comprising 50-90% of ethylene glycol monoethyl ether and 10-50% of xylene, and by baking.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、自己融着性絶縁電
線に関する。更に詳しくは、コイル巻線に用いられ、低
温での接着性が良好で且つ高い耐熱性を有し、更に皮膜
中の残留溶剤量が大幅に低減された熱接着型の自己融着
性絶縁電線に関する。TECHNICAL FIELD The present invention relates to a self-bonding insulated wire. More specifically, it is used for coil winding, has good adhesiveness at low temperature, has high heat resistance, and has a significantly reduced amount of residual solvent in the film, and is a self-bonding self-bonding insulated electric wire. Regarding

【０００２】[0002]

【従来の技術】自己融着性絶縁電線は、コイル巻線時に
溶剤を塗布したり加熱により容易に線間を固着できる事
から各種コイル、例えばモーターコイル、偏向ヨーク、
空心コイル、ファンモータ、ボイスコイル等に幅広く使
用されている。近年、部品の小型化に伴ない、コイルか
ら発生する皮膜中の残留溶剤が接点障害等の問題を発生
させる、また揮発した残留溶剤が臭気原因となる、等の
問題が発生してきている。又、近年は更なる耐熱性の要
求があり、従来の熱可塑性材料であるポリアミド樹脂等
を使用した自己融着性絶縁電線では要求を満足する事が
できないという問題があった。なおこれらの問題を解決
する為に、残留溶剤の低減に対しては、コイル部品をオ
ーブンで長時間加熱処理し残留溶剤を揮発させる方法が
とられている。又、高耐熱性の要求に対しては、高融点
材料の使用が一般的に行われている。2. Description of the Related Art Self-bonding insulated electric wires can be easily fixed between the wires by applying a solvent or heating the coils during coil winding, and therefore various coils such as motor coils, deflection yokes,
Widely used in air core coils, fan motors, voice coils, etc. In recent years, with the miniaturization of components, there have been problems that the residual solvent in the film generated from the coil causes problems such as contact failure, and the volatilized residual solvent causes odor. Further, in recent years, there has been a demand for further heat resistance, and there is a problem that the demand cannot be satisfied with a self-fusing insulated electric wire using a conventional thermoplastic resin such as polyamide resin. In order to solve these problems, in order to reduce the residual solvent, a method of heating the coil component in an oven for a long time to volatilize the residual solvent is adopted. To meet the demand for high heat resistance, a high melting point material is generally used.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、残留溶
剤を低減させる為にコイル部品を長時間加熱処理する事
は、部品のコストアップとなり、また空心コイルやＤＹ
コイルにおいてはコイル変形を発生させる等の問題点が
あった。又、高耐熱性の為に高融点材料を使用した場合
は、線間を接着させる為の加熱温度が高くなり、接着時
のレアーショートを発生させたり、コイル巻線性を低下
させる等の問題点があった。However, heat treatment of coil components for a long time in order to reduce the residual solvent increases the cost of the components, and also air-core coil and DY
The coil has problems such as deformation of the coil. In addition, when a high melting point material is used for high heat resistance, the heating temperature for bonding the wires becomes high, which causes problems such as rare shorts at the time of bonding and deterioration of coil winding property. was there.

【０００４】本発明は、上記従来技術が有する各種問題
点を解決するためになされたものであり、低温での接着
性が良好で且つ高い耐熱性を有し、更に皮膜中の残留溶
剤量が大幅に低減された熱接着型の自己融着性絶縁電線
を提供することを目的とする。The present invention has been made in order to solve the various problems of the above-mentioned prior art. It has good adhesiveness at low temperature and high heat resistance, and the amount of residual solvent in the coating is small. It is an object of the present invention to provide a heat-bonding type self-bonding insulated electric wire that is significantly reduced.

【０００５】[0005]

【課題を解決するための手段】第１の観点として本発明
は、分子量１０，０００〜３０，０００の高分子量ビス
フェノールＡ型エポキシ樹脂１００重量部（以下、高分
子量エポキシ樹脂と略記する）に、分子量１，０００〜
４，０００の低分子量ビスフェノールＡ型エポキシ樹脂
（以下、低分子量エポキシ樹脂と略記する）を２０〜７
０重量部、フェノール樹脂を５〜５０重量部配合し、こ
れを低沸点・高揮発性の有機溶剤（以下、低沸・高揮発
溶剤と略記する）に溶解した融着塗料を導体上に直接又
は他の絶縁皮膜を介して塗布、焼き付けた事を特徴とす
る自己融着性絶縁電線にある。上記第１の観点の自己融
着性絶縁電線に用いる高分子量エポキシ樹脂としては、
エポトートＹＰ−５０（東都化成社商品名）、ＰＫ−Ｈ
Ｈ（ユニオンカーバイト社商品名）等を挙げることがで
きる。また本発明の低分子量エポキシ樹脂としては、エ
ポトートＹＤ−０１４、ＹＤ−０１７（東都化成社商品
名）、エピコート１００４、１００７（油化シェルエポ
キシ社）等を挙げることができる。なお低分子量エポキ
シ樹脂の配合部数を２０〜７０重量部と限定した理由
は、２０重量部未満の場合は十分な耐熱性が得られず、
又、７０重量部を超えた場合は接着強度を低下させる為
である。また本発明のフェノール樹脂としては、ＰＬ−
２８２２、ＰＬ−２８２３（群栄化学工業社商品名）等
を挙げることができる。本発明のフェノール樹脂は、塗
布、焼付した融着皮膜中で低分子量および高分子量のビ
スフェノールＡ型エポキシ樹脂と絡み合った状態で均一
に分布した構造となる。更に、加熱処理することによっ
てフェノール樹脂とエポキシ樹脂の水酸基とエポキシ基
が反応し、耐熱性に優れる三次元の網目構造の架橋を形
成する。なおフェノール樹脂の配合部数を５〜５０重量
部と限定した理由は、５重量部未満の場合は十分な耐熱
性が得られず、又５０重量部を超えた場合は接着強度を
低下させる為である。更に本発明の自己融着性絶縁電線
は、使用する融着塗料に低沸・高揮発溶剤を用いている
為に、皮膜中に残留する溶剤量が少なくなる。従って、
従来のクレゾールを揮発させる条件に比べて低温、短時
間でによって溶剤を揮散させる事が可能となる。以上の
ように、本発明による融着塗料を塗布、焼付した自己融
着性絶縁電線は、皮膜中に残留している溶剤量が少な
く、且つ従来に比較し低温、短時間の熱処理で更に減少
させることが可能となった。又、低温で溶剤を揮発させ
る加熱処理において、同時にフェノール樹脂とエポキシ
樹脂の硬化反応が起きる為に、最終的に熱処理を行なっ
たコイルは、揮発する成分が非常に少なく、且つ耐熱性
に優れたコイルとなる。従って、従来からの課題であっ
た揮発物質が非常に少なく、且つ耐熱性に優れたコイル
部品が得られる。According to a first aspect of the present invention, 100 parts by weight of a high molecular weight bisphenol A type epoxy resin having a molecular weight of 10,000 to 30,000 (hereinafter, abbreviated as high molecular weight epoxy resin) is used. Molecular weight 1,000 ~
4,000 low molecular weight bisphenol A type epoxy resin (hereinafter abbreviated as low molecular weight epoxy resin) 20 to 7
0 parts by weight and 5 to 50 parts by weight of a phenol resin are mixed, and a fusion coating composition prepared by dissolving this in a low boiling point and high volatility organic solvent (hereinafter abbreviated as low boiling point and high volatility solvent) is directly applied to the conductor. Alternatively, the self-bonding insulated electric wire is characterized by being applied and baked through another insulating film. As the high molecular weight epoxy resin used for the self-bonding insulated electric wire of the first aspect,
Epotote YP-50 (trade name of Tohto Kasei Co., Ltd.), PK-H
H (trade name of Union Carbide Co.) and the like can be mentioned. Examples of the low molecular weight epoxy resin of the present invention include Epotote YD-014, YD-017 (trade name of Toto Kasei Co., Ltd.), Epicoat 1004, 1007 (Yukaka Shell Epoxy Co., Ltd.) and the like. The reason for limiting the number of parts of the low molecular weight epoxy resin to 20 to 70 parts by weight is that if the amount is less than 20 parts by weight, sufficient heat resistance cannot be obtained,
Also, when the amount exceeds 70 parts by weight, the adhesive strength is lowered. Further, as the phenol resin of the present invention, PL-
2822, PL-2823 (trade name of Gunei Chemical Industry Co., Ltd.) and the like. The phenol resin of the present invention has a structure in which the low molecular weight and high molecular weight bisphenol A type epoxy resin is uniformly entangled in the coated and baked fusion coating. Further, by heat treatment, the hydroxyl groups of the phenol resin and the epoxy resin react with the epoxy groups to form a three-dimensional network structure crosslink having excellent heat resistance. The reason for limiting the amount of the phenolic resin to 5 to 50 parts by weight is that sufficient heat resistance cannot be obtained when the amount is less than 5 parts by weight, and the adhesive strength is reduced when the amount exceeds 50 parts by weight. is there. Further, in the self-fusing insulated electric wire of the present invention, the amount of the solvent remaining in the film is small because the low-boiling, high-volatile solvent is used in the fusing paint used. Therefore,
The solvent can be volatilized at a low temperature and in a short time as compared with the conventional conditions for volatilizing cresol. As described above, the self-fusing insulated electric wire coated and baked with the fusion paint according to the present invention has a small amount of solvent remaining in the film, and further reduced by heat treatment at a low temperature for a short time as compared with the conventional one. It became possible to do. In addition, since the curing reaction of the phenol resin and the epoxy resin occurs at the same time in the heat treatment for volatilizing the solvent at a low temperature, the finally heat-treated coil has a very small amount of volatilized components and excellent heat resistance. It becomes a coil. Therefore, a coil component having a very small amount of volatile substances and excellent heat resistance, which has been a problem in the past, can be obtained.

【０００６】第２の観点として本発明は、前記低沸点・
高揮発性有機溶剤は、エチレングリコールモノエチルエ
ーテル、エチレングリコールモノメチルエーテル、また
はプロピレングリコールモノメチルエーテル、又はこれ
らの混合物が５０〜９０％、キシレンまたはソルベント
ナフサ、又はこれらの混合物が１０〜５０％からなる混
合溶剤である事を特徴とする自己融着性絶縁電線にあ
る。上記第２の観点の自己融着性絶縁電線では、前記低
沸・高揮発溶剤として、例えば、沸点が１３０〜１４０
℃であり、揮発性の高い、エチレングリコールモノエチ
ルエーテルが５０〜９０％、キシレンが１０〜５０％の
混合溶剤を好ましく用いることができる。なお、本発明
のエチレングリコールモノエチルエーテル、エチレング
リコールモノメチルエーテル等を５０〜９０wt％と限定
した理由は、エチレングリコールモノエチルエーテル等
が９０wt％を超えると電線の外観不良を起こすので好ま
しくなく、また５０wt％未満では溶解性と長期安定性が
悪く濁りが発生するので好ましくない為である。As a second aspect, the present invention provides the above-mentioned low boiling point
The highly volatile organic solvent comprises 50 to 90% of ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, or propylene glycol monomethyl ether, or a mixture thereof, and 10 to 50% of xylene or solvent naphtha or a mixture thereof. It is a self-bonding insulated electric wire characterized by being a mixed solvent. In the self-bonding insulated electric wire of the second aspect, the low boiling point and high volatility solvent has, for example, a boiling point of 130 to 140.
A mixed solvent of 50 to 90% of ethylene glycol monoethyl ether and 10 to 50% of xylene, which has a high volatile temperature and is volatile, can be preferably used. The reason why the ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, etc. of the present invention is limited to 50 to 90 wt% is not preferable because if the ethylene glycol monoethyl ether etc. exceeds 90 wt%, the appearance of the electric wire will be deteriorated. If it is less than 50 wt%, solubility and long-term stability are poor and turbidity occurs, which is not preferable.

【０００７】[0007]

【発明の実施の形態】以下に本発明の内容を実施の形態
（実施例）及び比較例を挙げて説明する。なお本発明は
本実施例に限定されるものではない。図１は本発明の実
施例１〜４、及び比較例１〜３の自己融着性絶縁電線に
用いる融着塗料の配合組成を示す図表である。図２は本
発明の実施例１〜４、及び比較例１〜３の自己融着性絶
縁電線の特性を示す図表である。BEST MODE FOR CARRYING OUT THE INVENTION The contents of the present invention will be described below with reference to embodiments (examples) and comparative examples. The present invention is not limited to this embodiment. FIG. 1 is a table showing the compounding composition of the fusion-bonding paint used for the self-fusing insulated electric wires of Examples 1 to 4 and Comparative Examples 1 to 3 of the present invention. FIG. 2 is a chart showing the characteristics of the self-fusing insulated electric wires of Examples 1 to 4 and Comparative Examples 1 to 3 of the present invention.

【０００８】−第１〜４の実施形態（実施例１Ｔ〜４
Ｔ）（融着塗料）− 図表１の配合組成表に従い、分子量１０，０００〜３
０，０００の高分子量エポキシ樹脂して東都化成社製Ｙ
Ｐ−５０を用い、分子量１，０００〜４，０００の低分
子量エポキシ樹脂として油化シェルエポキシ社製エピコ
ート１００７を用い、フェノール樹脂として群栄化学社
製ＰＬ−２８２３を用い、また溶剤としてエチレングリ
コールモノエチルエーテルとキシレンの混合溶剤を用い
て実施例１Ｔ〜４Ｔの融着塗料（樹脂濃度：１５％）を
調製した。なお、融着塗料の調製は、攪拌機、温度計付
きの４ツ口セパラブルフラスコに図表１の配合組成表に
従って、それぞれの樹脂および溶剤を投入し、８０℃〜
１００℃の温度に加温し、これらの樹脂が完全に溶解す
る迄攪拌したのち、室温迄冷却して行ったものである。First to fourth embodiments (Examples 1T to 4)
T) (Fusing paint) -Molecular weight of 10,000 to 3 according to the composition table of Figure 1.
Made by Tohto Kasei Co., Ltd. as a high molecular weight epoxy resin of 10,000
P-50 is used, Epicoat 1007 manufactured by Yuka Shell Epoxy Co., Ltd. is used as a low molecular weight epoxy resin having a molecular weight of 1,000 to 4,000, PL-2823 manufactured by Gunei Chemical Co. is used as a phenol resin, and ethylene glycol is used as a solvent. The fusion paints of Examples 1T to 4T (resin concentration: 15%) were prepared using a mixed solvent of monoethyl ether and xylene. In addition, in order to prepare the fusion coating material, each resin and solvent were charged into a 4-neck separable flask equipped with a stirrer and a thermometer in accordance with the composition table of FIG.
It was heated to a temperature of 100 ° C., stirred until these resins were completely dissolved, and then cooled to room temperature.

【０００９】―比較例１T、比較例２T（融着塗料）― 図１の配合組成表に従い、上記実施例１T〜４Tと同様に
して比較例１T、比較例２Tの融着塗料（樹脂濃度：１５
％）を調製した。なお、比較例２Tの融着塗料は溶解性
が悪く濁りが発生した。-Comparative Example 1T, Comparative Example 2T (fusion coating) -Fusing coatings of Comparative Example 1T and Comparative Example 2T (resin concentration: 15
%) Was prepared. The fusion paint of Comparative Example 2T had poor solubility and turbidity occurred.

【００１０】―比較例３T―（融着塗料） 図１の配合組成表に従い、高融点ポリアミド樹脂として
ＢＡＳＦ社製ウルトラミッド１Ｃを用い、溶剤としては
ｍ−クレゾールとキシレンを同量混合した溶剤を用い
て、比較例３Tの融着塗料（樹脂濃度：１５％）を調製
した。-Comparative Example 3T- (Fusing Coating) According to the composition table of FIG. 1, BASF Ultramid 1C was used as the high melting point polyamide resin, and the solvent was a mixture of m-cresol and xylene in the same amount. A fusion-bonding paint of Comparative Example 3T (resin concentration: 15%) was prepared using the above.

【００１１】―実施例１〜４、比較例１〜３（自己融着
性絶縁電線）― 以下に実施例１〜４、および比較例１〜３の自己融着性
絶縁電線の製造について説明する。導体径０．３００mm
の銅線上に、外径が０．３２５mmとなるようにポリエス
テルイミド絶縁塗料を塗布焼付た絶縁導体上に、図表１
の配合組成からなる実施例および比較例の各融着塗料
を、皮膜厚さが０．００８mmとなるようダイス５回塗
布、焼付により融着皮膜を形成し、実施例１〜４、およ
び比較例１〜３の自己融着性絶縁電線を製造した。な
お、この電線の製造に用いた焼付炉は、炉長２５００mm
の横形電熱炉を用い、炉温３５０℃、線速５０ｍ／ｍｉ
ｎの条件にて製造した。-Examples 1 to 4 and Comparative Examples 1 to 3 (self-bonding insulated wires) -The production of the self-bonding insulated wires of Examples 1 to 4 and Comparative Examples 1 to 3 will be described below. . Conductor diameter 0.300mm
On the copper wire of Fig. 1, apply the polyester imide insulating paint to the outer diameter of 0.325 mm and bake it on the insulated conductor.
Each of the fusion paints of Examples and Comparative Examples having the compounding composition of 5 was applied to a die 5 times so as to have a film thickness of 0.008 mm, and a fusion film was formed by baking to form Examples 1 to 4 and Comparative Examples. 1-3 self-fusing insulated electric wires were manufactured. The baking furnace used to manufacture this wire has a furnace length of 2500 mm.
Using a horizontal electric heating furnace, the furnace temperature is 350 ° C and the linear velocity is 50 m / mi.
It was manufactured under the condition of n.

【００１２】―自己融着性絶縁電線の特性試験― 前記実施例１〜４、および比較例１〜３により得られた
自己融着性絶縁電線の特性について図表２を用いて説明
する。先ず、ピンホール、絶縁破壊電圧等の一般特性
は、ＪＩＳ Ｃ ３００３に準拠し試験を行なった。接着
強度の試験（＊１）は、実施例および比較例のそれぞれ
の電線から適当長の試験線を採取し、５mmφのマンドレ
ルに２０ターン密着するように巻付けてヘリカルコイル
を作製し、１２０℃〜２００℃迄の範囲で２０℃間隔に
設定した恒温槽中に各１０分間放置するという加熱処理
により接着させた後取り出し、室温迄冷却後、引張り試
験機を用いて接着強度（N）を測定した。また熱雰囲気
中の接着強度の試験（＊２）は、前記実施例１〜４、比
較例１、２の電線については、上記と同様のヘリカルコ
イルを１８０℃×１０分の加熱処理により接着させたも
のを用い、また比較例３の電線については、２００℃×
１０分の加熱処理により接着させたものを用いて、２５
℃（室温）、１００℃〜１６０℃迄の範囲で２０℃間隔
に設定した恒温槽中での接着強度を測定した。なお、図
表２（＊２）に表記した値は実際の接着強度（N）であ
り、また（ ）内の数字は２５℃雰囲気中の接着強度に
対する比率を表す。この熱雰囲気中の接着強度は、耐熱
性の目安とする試験である。また皮膜中の残留溶剤量の
試験（＊３）は、先ず、前記実施例および比較例のそれ
ぞれの電線から５０mm長さの試験線を採取し、この試験
線をパイロライザー（試験機名）を用いて３５８℃で３
秒間加熱したときに発生したガスをガスクロマトグラフ
にて定量した（未処理）。更に１２０℃にて、１時間及
び５時間加熱処理後に同様に試験を行ない、加熱処理に
よる残留溶剤量低減度を試験した。なお、図表２の残留
溶剤量（＊３）（％）は皮膜重量１ｇに換算し、残留溶
剤量＝発生溶剤量／皮膜重量の計算式により計算した値
を表したものである。-Characteristic Test of Self-Fusable Insulated Wire-Characteristics of the self-fusion-bonded insulated wires obtained in Examples 1 to 4 and Comparative Examples 1 to 3 will be described with reference to FIG. First, general characteristics such as pinholes and dielectric breakdown voltage were tested according to JIS C 3003. The adhesive strength test (* 1) was conducted by taking a test wire of an appropriate length from each of the electric wires of the example and the comparative example, winding it around a 5 mmφ mandrel so as to be in tight contact with it for 20 turns, and producing a helical coil at 120 ° C. ~ 200 ℃ in a constant temperature bath set at 20 ℃ intervals each 10 minutes each by heat treatment to bond, take out, cool to room temperature, measure the adhesive strength (N) using a tensile tester did. Further, in the test of the adhesive strength in a hot atmosphere (* 2), for the electric wires of Examples 1 to 4 and Comparative Examples 1 and 2, the same helical coil as described above was adhered by heat treatment at 180 ° C for 10 minutes. And the electric wire of Comparative Example 3 is 200 ° C.
Using what was adhered by heat treatment for 10 minutes, 25
The adhesive strength was measured in a constant temperature bath set at 20 ° C intervals in the range of 100 ° C to 160 ° C at room temperature. The values shown in Chart 2 (* 2) are the actual adhesive strength (N), and the numbers in parentheses represent the ratio to the adhesive strength in an atmosphere at 25 ° C. The adhesive strength in this hot atmosphere is a test which is a measure of heat resistance. Further, in the test (* 3) of the amount of residual solvent in the coating, first, a test wire of 50 mm length was taken from each of the electric wires of the above-mentioned Examples and Comparative Examples, and the test wire was connected to a pyrolyzer (test machine name). Use at 358 ° C for 3
The gas generated when heated for 2 seconds was quantified by a gas chromatograph (untreated). Further, after the heat treatment at 120 ° C. for 1 hour and 5 hours, the same test was conducted to test the reduction degree of the residual solvent amount by the heat treatment. The residual solvent amount (* 3) (%) in Table 2 is a value calculated by converting the coating weight to 1 g and calculating the residual solvent amount = generated solvent amount / coating weight.

【００１３】図表２から明らかなように、本発明の実施
例１〜４の自己融着性絶縁電線は接着強度の点に関して
は、比較例の電線（特に比較例３）と比較して、低温
（１２０℃〜１６０℃）での接着強度が高いことが分か
る。また熱雰囲気中の接着強度の点に関しては、比較例
の電線と比較して、１６０℃熱雰囲気中でも、室温での
接着強度に対する比率が５０％近辺であり、耐熱性が高
いことが分かる。また残留溶剤量の点に関しては、比較
例の電線（特に比較例３）と比較して、未処理、加熱処
理後共に残留溶剤量が極めて少ないことが分かる。As is clear from FIG. 2, the self-fusing insulated electric wires of Examples 1 to 4 of the present invention are lower in temperature than the electric wires of Comparative Examples (especially Comparative Example 3) in terms of adhesive strength. It can be seen that the adhesive strength at (120 ° C to 160 ° C) is high. Regarding the adhesive strength in the hot atmosphere, the ratio to the adhesive strength at room temperature is about 50% even in the hot atmosphere at 160 ° C., which is higher in heat resistance than the electric wire of the comparative example. Regarding the amount of residual solvent, it can be seen that the amount of residual solvent is extremely small both in the untreated and after the heat treatment as compared with the electric wire of Comparative Example (particularly Comparative Example 3).

【００１４】[0014]

【発明の効果】本発明の自己融着性絶縁電線は、特定組
成の融着塗料を導体上に直接又は他の絶縁皮膜を介して
塗布、焼き付けているので低温での接着性が良好で且つ
高い耐熱性を有する。更に、皮膜中に残留している溶剤
量が、従来のクレゾールを使用した融着塗料を用いた自
己融着性絶縁電線に比較し、大幅に低減できる。よっ
て、従来のように長時間の加熱処理により残留溶剤を低
減させる必要がなくなり、短時間の処理で低減させるこ
とが可能とり、コイル巻線用として好ましく用いること
ができる。従って、本発明は産業上に寄与する効果が極
めて大である。EFFECTS OF THE INVENTION The self-fusing insulated electric wire of the present invention has a good adhesion at low temperature because the fusion paint of a specific composition is applied to the conductor directly or through another insulating film and baked. Has high heat resistance. Further, the amount of solvent remaining in the film can be significantly reduced as compared with the conventional self-fusing insulated electric wire using the fusing paint using cresol. Therefore, it is not necessary to reduce the residual solvent by heat treatment for a long time as in the prior art, and it is possible to reduce the residual solvent by a short time treatment, which can be preferably used for coil winding. Therefore, the present invention is extremely effective in contributing to the industry.

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

【図１】本発明の実施例１〜４、及び比較例１〜３の自
己融着性絶縁電線に用いる融着塗料の配合組成を示す図
表である。FIG. 1 is a table showing the compounding composition of fusion-bonding paints used in the self-fusing insulated electric wires of Examples 1 to 4 and Comparative Examples 1 to 3 of the present invention.

【図２】本発明の実施例１〜４、及び比較例１〜３の自
己融着性絶縁電線の特性を示す図表である。FIG. 2 is a table showing characteristics of self-fusing insulated electric wires of Examples 1 to 4 and Comparative Examples 1 to 3 of the present invention.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 分子量１０，０００〜３０，０００の高
分子量ビスフェノールＡ型エポキシ樹脂１００重量部
に、分子量１，０００〜４，０００の低分子量ビスフェ
ノールＡ型エポキシ樹脂を２０〜７０重量部、フェノー
ル樹脂を５〜５０重量部配合し、これを低沸点・高揮発
性の有機溶剤に溶解した融着塗料を導体上に直接又は他
の絶縁皮膜を介して塗布、焼き付けた事を特徴とする自
己融着性絶縁電線。1. 100 to 100 parts by weight of a high molecular weight bisphenol A type epoxy resin having a molecular weight of 10,000 to 30,000, 20 to 70 parts by weight of a low molecular weight bisphenol A type epoxy resin having a molecular weight of 1,000 to 4,000, and phenol Self-characterized by blending 5 to 50 parts by weight of resin, applying a fusion paint prepared by dissolving this in an organic solvent with a low boiling point and a high volatility, directly on the conductor or through another insulating film, and baking. Fusing insulated wire. 【請求項２】 前記低沸点・高揮発性有機溶剤は、エチ
レングリコールモノエチルエーテル、エチレングリコー
ルモノメチルエーテル、またはプロピレングリコールモ
ノメチルエーテル、又はこれらの混合物が５０〜９０
％、キシレンまたはソルベントナフサ、又はこれらの混
合物が１０〜５０％からなる混合溶剤である事を特徴と
する請求項１記載の自己融着性絶縁電線。2. The low boiling point and high volatile organic solvent is ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, propylene glycol monomethyl ether, or a mixture thereof in an amount of 50 to 90.
%, Xylene, solvent naphtha, or a mixture thereof of 10 to 50% is a mixed solvent, and the self-bonding insulated electric wire according to claim 1.