JP2004031253A - Enameled wire for ammonia refrigerant - Google Patents

Enameled wire for ammonia refrigerant Download PDF

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Publication number
JP2004031253A
JP2004031253A JP2002189184A JP2002189184A JP2004031253A JP 2004031253 A JP2004031253 A JP 2004031253A JP 2002189184 A JP2002189184 A JP 2002189184A JP 2002189184 A JP2002189184 A JP 2002189184A JP 2004031253 A JP2004031253 A JP 2004031253A
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Japan
Prior art keywords
ammonia
conductor
resin
film
enameled wire
Prior art date
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Pending
Application number
JP2002189184A
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Japanese (ja)
Inventor
Kazunori Suzuki
鈴木 和則
Sadami Itonaga
糸永 貞美
Tomonori Sakamoto
坂本 智則
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Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
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Publication date
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Priority to JP2002189184A priority Critical patent/JP2004031253A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an enameled wire that is usable in the coexistence of ammonia. <P>SOLUTION: The enameled wire 10 for an ammonia refrigerant is so structured that a film 2 of polysulfone resin is formed around a conductor 1. The film 2 is formed when a coating material where the polysulfone resin is dissolved in a solvent is applied to the periphery of the conductor 1 and the coating material is baked. The structure, wherein the film of polysulfone resin with ammonia resistance is formed on the conductor, is usable even in the coexistence of ammonia. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、アンモニア冷媒用エナメル線に関し、特に、アンモニア共存下で使用できるアンモニア冷媒用エナメル線に関する。
【0002】
【従来の技術】
従来のエナメル線には、導体上に耐冷媒性の優れたポリエステルイミド樹脂やポリアミドイミド樹脂あるいはこれらを複合化した皮膜が形成されているものがある。そのため、フロンなどの冷媒が共存している冷凍、冷蔵および冷房用機器に用いられるモータのマグネットワイヤとして使用されている。
【0003】
ところが、近年、地球環境問題が注目される中、オゾン層の破壊や地球温暖化に影響を及ぼすフロンの使用が制限されるようになってきた。そこで、代替の冷媒としてオゾン層の破壊や地球温暖化に対する影響の極めて小さい自然冷媒の炭化水素またはアンモニアの使用が進んでいる。
【0004】
【発明が解決しようとする課題】
しかし、従来のエナメル線は、ポリエステルイミド樹脂やポリアミドイミド樹脂、あるいはこれらを複合化した皮膜がされているため、従来のフロンなどの冷媒には耐性があるものの、耐アンモニア性が不十分であるという問題がある。
【0005】
従って、本発明は、アンモニア共存下で使用できるエナメル線を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明は、上記目的を達成するため、導体と、前記導体上に形成されたポリサルホン系樹脂からなる皮膜と、を備えたことを特徴とするアンモニア冷媒用エナメル線を提供する。
【0007】
この構成によれば、耐アンモニア性を有するポリサルホン系樹脂の皮膜を導体上に形成するため、アンモニア共存下においても使用することができる。
【0008】
【発明の実施の形態】
図1は、本発明の実施の形態に係るアンモニア冷媒用エナメル線を示す。このアンモニア冷媒用エナメル線10は、導体1の周囲にポリサルホン系樹脂の皮膜2が形成されている。皮膜2は、ポリサルホン系樹脂を溶媒で溶解した塗料を導体1上に塗布し、塗料を焼き付けることで得られる。
【0009】
皮膜2として用いるポリサルホン系樹脂は、ポリサルホン樹脂、ポリエーテルサルホン樹脂、ポリフェニルサルホン樹脂およびポリフェニレンサルファイド樹脂などが代表的なものである。この中で、耐アンモニア性に優れる点から、ポリエーテルサルホン樹脂、ポリフェニルサルホン樹脂およびポリフェニレンサルファイド樹脂が好ましい。
【0010】
さらに、ポリエーテルサルホン樹脂およびポリフェニルサルホン樹脂は溶剤に溶けやすいため、塗料化が容易であるという点から、従来のエナメル線と同様に、塗料を塗布し、焼付する製造方法で行うことができる。これにより、数μmの薄い塗膜を重ね塗りして皮膜を形成することができるため、ピンポールレスの皮膜を得やすい面で好ましい。ポリフェニレンサルファイド樹脂は溶剤に溶かすことが不可能なため、押出しにて皮膜を形成する。
【0011】
ポリエーテルサルホン樹脂としては、住友化学工業株式会社製のスミカエクセル(商標)PES4100P、4800P、5200P、5003P、7600P、ソルベイアドバンストポリマーズ株式会社製のレーデルA−300などがある。ポリフェニルサルホン樹脂としてはソルベイアドバンストポリマーズ株式会社製のレーデル(商標)R−5000などがある。
【0012】
ポリフェニレンサルファイト樹脂としては、日本ポリプラスチックス株式会社製のフォートロン(商標)KSPシリーズがある。
【0013】
本発明の実施の形態に係るアンモニア冷媒用エナメル線10は、導体1上に耐アンモニア性を有するポリサルホン系樹脂の皮膜2を形成することとしたため、アンモニア共存下での使用が可能である。
【0014】
なお、導体1は、通常銅が最も一般的であるが、耐アンモニア性に優れるという面からアルミニウムが最も好ましい。また、ポリエーテルサルホン樹脂およびポリフェニルサルホン樹脂を塗料化してエナメル線を製造する場合、それぞれ単独の皮膜として用いることも可能であるが、それぞれの樹脂を混合した塗料を作製し用いてもよい。また、下層にポリエーテルサルホン樹脂、上層にポリフェニルサルホン樹脂あるいはその逆といったダブルコートなど多層の皮膜構成をとることも可能である。さらに、巻線性を向上する目的で、エナメル線表面の滑り性を良くするため、ポリエーテルサルホン樹脂あるいはポリフェニルサルホン樹脂に滑剤を混合分散した塗料を焼付けて、自己潤滑処理を行うことも可能である。滑剤としては、ポリエチレンやポリプロピレンなどのポリオレフィンワックスや、脂肪酸エステルワックス等が代表的であるがこれに限るものではない。
【0015】
【実施例】
次に本発明の実施例および比較例を説明する。実施例1〜4、比較例1及び2に用いる供試線は、直径(以下「導体径」という。)1.3mmのアルミニウムからなる導体1の上に、各実施例、比較例に示す絶縁塗料を皮膜厚さ約40μmとなるように熱風循環式堅型焼付け炉により塗布焼付けして得た。また、実施例5の供試線も同様に導体径1.3mmのアルミニウムからなる導体1を用い、皮膜厚さ50μmとなるように押出機により製造した。
【0016】
この供試線について、寸法、絶縁破壊電圧、密着性、可とう性をJISC−3003に準拠し測定した。また、耐アンモニア性の評価は、供試線をJISC−3003に基づき対撚り試料とし、この対撚り試料を直径50mm、長さ300mmのガラスアンプル内に25%のアンモニア水とともに封管し、120℃で7日間恒温槽内で加熱後、対撚り試料を取り出して絶縁破壊電圧を測定した。判定は、耐アンモニア試験後の絶縁破壊電圧値の残率が初期と比較し80%以上の値である場合を合格とした。
【0017】
<実施例1>
この実施例1は皮膜2の塗料として、住友化学工業株式会社製ポリエーテルサルホン樹脂スミカエクセル(商標)PES5200Pを溶剤のN−メチルピロリドンに25%濃度となるように溶解したものを用いた。次に、この塗料を導体径1.3mmのアルミニウムからなる導体1上に塗布・焼付して供試線を得た。
【0018】
<実施例2>
この実施例2は皮膜2の塗料原料として、住友化学工業株式会社製ポリエーテルサルホン樹脂スミカエクセル(商標)PES5200Pのかわりに住友化学工業株式会社製ポリエーテルサルホン樹脂スミカエクセル(商標)PES5003Pとした以外は実施例1と同様の工程により供試線を得た。
【0019】
<実施例3>
この実施例3は皮膜2の塗料原料として、住友化学工業株式会社製ポリエーテルサルホン樹脂スミカエクセル(商標)PES5200Pのかわりにソルベイアドバンストポリマーズ株式会社製ポリフェニルサルホン樹脂レーデル(商標)R−5000とした以外は実施例1と同様の工程により供試線を得た。
【0020】
<実施例4>
この実施例4は皮膜2の塗料として、住友化学工業株式会社製ポリエーテルサルホン樹脂スミカエクセル(商標)PES5200Pとソルベイアドバンストポリマーズ株式会社製ポリフェニルサルホン樹脂レーデル(商標)R−5000を重量比1対1で混合し、この混合樹脂を溶剤のN−メチルピロリドンに25%濃度となるように溶解したものを用いた。この塗料を実施例1と同様に塗布・焼付けし、供試線を得た。
【0021】
<実施例5>
この実施例5は皮膜2として、日本ポリプラスチックス株式会社製ポリフェニレンサルファイド樹脂フォートロン(商標)KPS0220A92を導体径1.3mmのアルミニウムからなる導体1上に320℃の温度で押出して供試線を得た。
【0022】
<比較例1>
この比較例1は、皮膜2として、大日精化工業株式会社製ポリエステルイミド塗料EH−402−40を導体径1.3mmのアルミニウムからなる導体1上に30μmの厚さとなるように塗布・焼付けし、さらにその上層に日立化成工業株式会社製ポリアミドイミド塗料HI−406−30を10μmの厚さとなるように塗布・焼付して供試線を得た。
【0023】
<比較例2>
この比較例2は、皮膜2として、日立化成工業株式会社製ポリアミドイミド塗料HI−406−30を導体径1.3mmのアルミニウムからなる導体1上に40μmの厚さとなるように塗布・焼付して供試線を得た。
【0024】
表1に実施例及び比較例の供試線の特性を示す。
【表1】

Figure 2004031253
【0025】
表1からわかるように実施例1〜5の供試線は、耐アンモニア性試験において、絶縁破壊電圧の値が初期と比較してあまり低下していない。よって、判定としては合格(○)となる。これに対し、比較例1、2の供試線は、耐アンモニア性試験後の絶縁破壊電圧の低下が著しい。そのため、判定は(×)となっている。以上のことから、本発明より得られる耐アンモニア性エナメル線の優位性は明らかである。
【0026】
【発明の効果】
本願発明に係るアンモニア冷媒用エナメル線は、導体上に耐アンモニア性を有するポリサルホン系樹脂の皮膜を形成することとしたため、アンモニア共存下での使用が可能となる。
【図面の簡単な説明】
【図1】本発明の実施の形態に係るアンモニア冷媒用エナメル線を示す。
【符号の説明】
1 導体
2 皮膜
10 エナメル線[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an enamel wire for ammonia refrigerant, and more particularly to an enamel wire for ammonia refrigerant that can be used in the presence of ammonia.
[0002]
[Prior art]
Some of the conventional enameled wires have a conductor on which a polyesterimide resin or a polyamideimide resin having excellent refrigerant resistance or a film obtained by compounding them is formed. Therefore, it is used as a magnet wire of a motor used in refrigeration, refrigeration and cooling equipment in which a refrigerant such as chlorofluorocarbon coexists.
[0003]
However, in recent years, as global environmental problems have attracted attention, the use of chlorofluorocarbon, which affects the destruction of the ozone layer and global warming, has been restricted. Therefore, the use of natural refrigerants such as hydrocarbons or ammonia, which have an extremely small effect on the destruction of the ozone layer and global warming, as an alternative refrigerant, is being promoted.
[0004]
[Problems to be solved by the invention]
However, since the conventional enameled wire has a polyesterimide resin or a polyamideimide resin, or a film formed by compounding these, it has resistance to conventional refrigerants such as chlorofluorocarbons, but has insufficient ammonia resistance. There is a problem.
[0005]
Accordingly, an object of the present invention is to provide an enameled wire that can be used in the presence of ammonia.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an ammonia refrigerant enameled wire comprising: a conductor; and a film made of a polysulfone-based resin formed on the conductor.
[0007]
According to this configuration, since a polysulfone-based resin film having ammonia resistance is formed on the conductor, it can be used even in the presence of ammonia.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an ammonia refrigerant enameled wire according to an embodiment of the present invention. The ammonia refrigerant enameled wire 10 has a polysulfone-based resin film 2 formed around a conductor 1. The coating 2 is obtained by applying a paint in which a polysulfone-based resin is dissolved in a solvent onto the conductor 1 and baking the paint.
[0009]
Representative examples of the polysulfone resin used as the film 2 include a polysulfone resin, a polyethersulfone resin, a polyphenylsulfone resin, and a polyphenylene sulfide resin. Among them, polyethersulfone resin, polyphenylsulfone resin and polyphenylene sulfide resin are preferable from the viewpoint of excellent ammonia resistance.
[0010]
Furthermore, since polyethersulfone resin and polyphenylsulfone resin are easily soluble in solvents, they can be easily made into paints. Can be. This makes it possible to form a film by coating a thin coating film having a thickness of several μm, which is preferable in that a pin-pole-less film can be easily obtained. Since polyphenylene sulfide resin cannot be dissolved in a solvent, a film is formed by extrusion.
[0011]
Examples of the polyether sulfone resin include Sumika Excel (trademark) PES4100P, 4800P, 5200P, 5003P, 7600P manufactured by Sumitomo Chemical Co., Ltd., and Radel A-300 manufactured by Solvay Advanced Polymers Co., Ltd. Examples of the polyphenylsulfone resin include Radel (trademark) R-5000 manufactured by Solvay Advanced Polymers Co., Ltd.
[0012]
As the polyphenylene sulphite resin, there is FORTRON (trademark) KSP series manufactured by Japan Polyplastics Co., Ltd.
[0013]
The enamel wire for ammonia refrigerant 10 according to the embodiment of the present invention is formed in such a manner that the polysulfone-based resin film 2 having ammonia resistance is formed on the conductor 1, so that it can be used in the presence of ammonia.
[0014]
The conductor 1 is usually most commonly made of copper, but is most preferably aluminum in terms of excellent ammonia resistance. In the case of producing an enameled wire by converting a polyether sulfone resin and a polyphenyl sulfone resin into a paint, it is possible to use each as a single film, but it is also possible to prepare and use a paint in which each resin is mixed. Good. It is also possible to adopt a multilayer coating structure such as a double coat such as a polyether sulfone resin in the lower layer and a polyphenyl sulfone resin in the upper layer or vice versa. Furthermore, in order to improve the winding property, in order to improve the slipperiness of the surface of the enameled wire, a self-lubrication treatment may be performed by baking a paint in which a lubricant is mixed and dispersed in a polyether sulfone resin or a polyphenyl sulfone resin. It is possible. Typical lubricants include polyolefin waxes such as polyethylene and polypropylene, and fatty acid ester waxes, but are not limited thereto.
[0015]
【Example】
Next, examples and comparative examples of the present invention will be described. The test wires used in Examples 1 to 4 and Comparative Examples 1 and 2 were obtained by insulating the conductor 1 made of aluminum having a diameter (hereinafter, referred to as “conductor diameter”) of 1.3 mm on the conductor 1. The paint was applied and baked by a hot air circulation type baking oven so as to have a film thickness of about 40 μm. Similarly, the test wire of Example 5 was manufactured using an aluminum conductor having a conductor diameter of 1.3 mm and an extruder so as to have a coating thickness of 50 μm.
[0016]
The dimensions, insulation breakdown voltage, adhesion, and flexibility of the test wire were measured in accordance with JISC-3003. In addition, the ammonia resistance was evaluated by using a test wire as a twisted sample based on JISC-3003, sealing the twisted sample in a glass ampoule having a diameter of 50 mm and a length of 300 mm together with 25% ammonia water, After heating in a thermostat at 7 ° C. for 7 days, the twisted sample was taken out and the dielectric breakdown voltage was measured. In the judgment, the case where the residual ratio of the dielectric breakdown voltage value after the ammonia resistance test was 80% or more compared with the initial value was regarded as pass.
[0017]
<Example 1>
In Example 1, as the coating material for the film 2, a solution prepared by dissolving a polyether sulfone resin Sumika Excel (trademark) PES5200P manufactured by Sumitomo Chemical Co., Ltd. in N-methylpyrrolidone as a solvent to a concentration of 25% was used. Next, this paint was applied and baked on a conductor 1 made of aluminum having a conductor diameter of 1.3 mm to obtain a test wire.
[0018]
<Example 2>
In Example 2, as a coating material for the coating 2, instead of Sumitomo Chemical Co., Ltd. polyether sulfone resin Sumika Excel (trademark) PES5200P, Sumitomo Chemical Co., Ltd. polyether sulfone resin Sumika Excel (trademark) PES5003P was used. A test wire was obtained in the same manner as in Example 1 except that the test was performed.
[0019]
<Example 3>
In Example 3, as a coating material for the coating 2, instead of Sumitomo Chemical Co., Ltd. polyether sulfone resin Sumika Excel (trademark) PES5200P, polyphenyl sulfone resin Radel (trademark) R-5000 manufactured by Solvay Advanced Polymers Co., Ltd. A test line was obtained by the same steps as in Example 1 except that the above conditions were satisfied.
[0020]
<Example 4>
In Example 4, as a coating material for the film 2, a polyethersulfone resin SUMIKAEXCEL (trademark) PES5200P manufactured by Sumitomo Chemical Co., Ltd. and a polyphenylsulfone resin Radel (trademark) R-5000 manufactured by Solvay Advanced Polymers Co., Ltd. were used in a weight ratio. One-to-one mixing was performed, and the mixed resin was dissolved in N-methylpyrrolidone as a solvent to a concentration of 25%. This paint was applied and baked in the same manner as in Example 1 to obtain a test wire.
[0021]
<Example 5>
In Example 5, as a film 2, a polyphenylene sulfide resin FORTRON (trademark) KPS0220A92 manufactured by Japan Polyplastics Co., Ltd. was extruded onto a conductor 1 made of aluminum having a conductor diameter of 1.3 mm at a temperature of 320 ° C. to obtain a test wire. Obtained.
[0022]
<Comparative Example 1>
In Comparative Example 1, as a film 2, a polyesterimide paint EH-402-40 manufactured by Dainichi Seika Kogyo Co., Ltd. was applied and baked to a thickness of 30 μm on a conductor 1 made of aluminum having a conductor diameter of 1.3 mm. A polyamide imide paint HI-406-30 manufactured by Hitachi Chemical Co., Ltd. was applied and baked on the upper layer so as to have a thickness of 10 μm to obtain a test wire.
[0023]
<Comparative Example 2>
In Comparative Example 2, as a film 2, a polyamideimide paint HI-406-30 manufactured by Hitachi Chemical Co., Ltd. was applied and baked on a conductor 1 made of aluminum having a conductor diameter of 1.3 mm to a thickness of 40 μm. A test line was obtained.
[0024]
Table 1 shows the characteristics of the test lines of the examples and comparative examples.
[Table 1]
Figure 2004031253
[0025]
As can be seen from Table 1, in the test lines of Examples 1 to 5, in the ammonia resistance test, the value of the dielectric breakdown voltage did not decrease much compared with the initial value. Therefore, the judgment is passed (合格). On the other hand, in the test wires of Comparative Examples 1 and 2, the dielectric breakdown voltage after the ammonia resistance test was significantly reduced. Therefore, the judgment is (x). From the above, the superiority of the ammonia-resistant enameled wire obtained from the present invention is apparent.
[0026]
【The invention's effect】
Since the enameled wire for ammonia refrigerant according to the present invention is formed by forming a film of a polysulfone-based resin having ammonia resistance on a conductor, it can be used in the presence of ammonia.
[Brief description of the drawings]
FIG. 1 shows an ammonia refrigerant enameled wire according to an embodiment of the present invention.
[Explanation of symbols]
1 conductor 2 film 10 enameled wire

Claims (3)

導体と、
前記導体上に形成されたポリサルホン系樹脂からなる皮膜と、を備えたことを特徴とするアンモニア冷媒用エナメル線。
Conductor and
And a film formed of a polysulfone-based resin formed on the conductor.
前記ポリサルホン系樹脂は、ポリエーテルサルホン、ポリフェニルサルホン、およびポリフェニレンサルファイドから選ばれる少なくとも1種であることを特徴とする請求項1記載のアンモニア冷媒用エナメル線。The enameled wire for ammonia refrigerant according to claim 1, wherein the polysulfone-based resin is at least one selected from polyethersulfone, polyphenylsulfone, and polyphenylene sulfide. 前記導体は、アルミニウムからなることを特徴とする請求項1記載のアンモニア冷媒用エナメル線。The enameled wire for ammonia refrigerant according to claim 1, wherein the conductor is made of aluminum.
JP2002189184A 2002-06-28 2002-06-28 Enameled wire for ammonia refrigerant Pending JP2004031253A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103093870A (en) * 2011-11-04 2013-05-08 苏州贝得科技有限公司 Ammonia resistant enameled wire
JP2014007173A (en) * 2013-10-16 2014-01-16 Kobe Steel Ltd Terminal rod
EP3591809A1 (en) 2018-07-05 2020-01-08 Moteurs Leroy-Somer Electric motor stator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103093870A (en) * 2011-11-04 2013-05-08 苏州贝得科技有限公司 Ammonia resistant enameled wire
JP2014007173A (en) * 2013-10-16 2014-01-16 Kobe Steel Ltd Terminal rod
EP3591809A1 (en) 2018-07-05 2020-01-08 Moteurs Leroy-Somer Electric motor stator

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