JPH10334735A - Polyimide insulating coating material and insulated wire - Google Patents
Polyimide insulating coating material and insulated wireInfo
- Publication number
- JPH10334735A JPH10334735A JP15917297A JP15917297A JPH10334735A JP H10334735 A JPH10334735 A JP H10334735A JP 15917297 A JP15917297 A JP 15917297A JP 15917297 A JP15917297 A JP 15917297A JP H10334735 A JPH10334735 A JP H10334735A
- Authority
- JP
- Japan
- Prior art keywords
- polyimide
- insulated wire
- melamine
- resin
- precursor
- 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.)
- Granted
Links
Landscapes
- Paints Or Removers (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、銅導体との密着性
に優れたポリイミド系絶縁塗料、及び該絶縁塗料を銅導
体上に塗布、焼き付けて形成した絶縁皮膜を有する絶縁
電線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyimide-based insulating paint having excellent adhesion to a copper conductor, and an insulated wire having an insulating film formed by applying and baking the insulating paint on a copper conductor.
【０００２】[0002]
【従来の技術】近年、機器の小型化、軽量化の要求に伴
い、モーターについても小型かつ高出力のものが要求さ
れている。これらの要求に応えるには、モーターのコア
に従来よりも多くの絶縁電線（巻線）を巻き付けるか、
大きな電流を流す必要がある。絶縁電線は、一般に、導
体上に保護と絶縁のための絶縁皮膜が形成された構造を
有している。モーターのコアに多くの絶縁電線を巻き付
けるためには、コアのスロット内に多くの絶縁電線を無
理に詰め込むことになるため、巻線工程で絶縁皮膜に損
傷が生じる危険性がある。その結果、レアー不良やアー
ス不良が発生するという問題がある。2. Description of the Related Art In recent years, along with the demand for miniaturization and weight reduction of equipment, a motor having a small size and high output has been demanded. To meet these demands, wind more insulated wires (windings) around the motor core,
A large current needs to flow. An insulated wire generally has a structure in which an insulating film for protection and insulation is formed on a conductor. In order to wind many insulated wires around the core of the motor, many insulated wires are forcibly packed in the slots of the core, and there is a risk that the insulating film may be damaged in the winding process. As a result, there is a problem that a layer failure and a ground failure occur.
【０００３】一方、絶縁電線に大きな電流を流すと、導
体の発熱により、絶縁電線の温度が上昇して、絶縁皮膜
の軟化や劣化を引き起こし、やはりレアー不良やアース
不良が発生するという問題がある。特に、近年注目され
ている電気自動車では、モーターの絶縁電線に１００Ａ
程度の極めて大きな電流を流すため、前記の如き問題が
ますます顕著になっている。絶縁電線としては、銅線な
どの銅導体上に、各種合成エナメルワニス（絶縁塗料）
を塗布し、焼き付けて絶縁皮膜を形成した焼付線が汎用
されている。したがって、前記の問題は、機械的強度と
耐熱性に優れ、かつ、銅導体との密着性に優れた薄い絶
縁皮膜を形成することができる絶縁塗料を使用すること
により、解決することができる。On the other hand, when a large current flows through an insulated wire, the temperature of the insulated wire rises due to the heat generated by the conductor, causing the insulation film to soften or deteriorate, which also causes a layer failure and a ground failure. . In particular, in electric vehicles, which have been attracting attention in recent years, 100 A
Due to the flow of an extremely large current, the above-mentioned problem becomes more and more prominent. For insulated wires, various synthetic enamel varnishes (insulating paint) on copper conductors such as copper wires
A baked wire in which an insulating film is formed by applying and baking is commonly used. Therefore, the above problem can be solved by using an insulating paint that is excellent in mechanical strength and heat resistance and that can form a thin insulating film having excellent adhesion to a copper conductor.
【０００４】ところで、銅導体上に機械的強度と耐熱性
に優れた絶縁皮膜を形成することができる絶縁塗料とし
て、ポリイミドワニスが知られている。銅線上にポリイ
ミドワニスを塗布、焼き付けしたポリイミド線は、機械
的特性、化学的特性（耐薬品性、耐油性など）、熱的特
性などに優れている。このようなポリイミドワニスとし
ては、例えば、１，２，４，５−ベンゼンテトラカルボ
ン酸二無水物（即ち、ピロメリット酸二無水物）と４，
４′−ジアミノジフェニルエーテルとを反応させて得ら
れるポリアミド酸（即ち、ポリイミド前駆体）を含有す
るエナメルワニス（市販品では、例えば、ＩＳＴ社製、
商品名ＰｙｒｅＭＬワニス）が代表的なものである。Incidentally, polyimide varnish is known as an insulating paint capable of forming an insulating film having excellent mechanical strength and heat resistance on a copper conductor. A polyimide wire obtained by applying and baking a polyimide varnish on a copper wire has excellent mechanical properties, chemical properties (chemical resistance, oil resistance, etc.), thermal properties, and the like. Examples of such a polyimide varnish include 1,2,4,5-benzenetetracarboxylic dianhydride (that is, pyromellitic dianhydride) and
An enamel varnish containing a polyamic acid (i.e., a polyimide precursor) obtained by reacting with 4'-diaminodiphenyl ether (a commercially available product, for example, manufactured by IST,
(Product name PyreML varnish) is a representative one.
【０００５】ところが、ポリイミド系樹脂は、銅導体と
の密着性が必ずしも充分ではなく、巻線工程で受ける衝
撃や摩擦などにより絶縁皮膜が損傷を受けて、レアー不
良やアース不良が発生するという問題があった。従来よ
り、ポリエステルイミド、ポリエステルアミドイミド、
ポリアミドイミド、ポリイミドなどのポリイミド系樹脂
と銅導体との密着性を改善するために、密着性付与剤と
して、メラミン樹脂などのアミノ樹脂を添加する方法が
提案されている（特開平２−４８８０号公報など）。メ
ラミン樹脂は、メラミンとホルムアルデヒドとの反応生
成物である。しかしながら、本発明者らの検討結果によ
れば、メラミン樹脂を添加したポリイミドワニスを用い
ても、銅導体との密着性の改善効果は小さく、巻線工程
での絶縁皮膜の損傷問題の解決にとっては、実用上満足
できるものではないことが判明した。[0005] However, the polyimide resin does not always have sufficient adhesion to the copper conductor, and the insulation film is damaged by the impact or friction received in the winding process, resulting in poor layering and poor grounding. was there. Conventionally, polyester imide, polyester amide imide,
In order to improve the adhesion between a polyimide-based resin such as polyamide imide or polyimide and a copper conductor, a method has been proposed in which an amino resin such as a melamine resin is added as an adhesion-imparting agent (JP-A-2-4880). Gazettes). Melamine resin is a reaction product of melamine and formaldehyde. However, according to the study results of the present inventors, even if a polyimide varnish to which a melamine resin is added is used, the effect of improving the adhesion to the copper conductor is small, and the solution to the problem of damage to the insulating film in the winding process is not sufficient. Was found not to be practically satisfactory.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、機械
的強度、耐熱性、耐薬品性などに優れると共に、銅導体
との密着性が顕著に優れ、モーターの小型化や高出力化
の要求に充分に応えることがでる絶縁皮膜を形成するこ
とができるポリイミド系絶縁塗料を提供することにあ
る。本発明の他の目的は、機械的強度、耐熱性、耐薬品
性などに優れると共に、銅導体との密着性が顕著に優れ
たポリイミド系絶縁皮膜が形成された絶縁電線を提供す
ることにある。本発明者らは、前記従来技術の問題点を
克服するために鋭意研究した結果、ポリイミド系樹脂
（前駆体を含む）を含有する絶縁塗料にメラミンを特定
割合で配合することにより、前記目的を達成できること
を見いだし、その知見に基づいて本発明を完成するに至
った。SUMMARY OF THE INVENTION An object of the present invention is to provide a motor having excellent mechanical strength, heat resistance, chemical resistance, etc., remarkably excellent adhesion to a copper conductor, and a motor having a small size and high output. An object of the present invention is to provide a polyimide-based insulating paint capable of forming an insulating film that can sufficiently meet the demand. Another object of the present invention is to provide an insulated wire on which a polyimide-based insulating film having excellent mechanical strength, heat resistance, chemical resistance, and the like and excellent adhesion with a copper conductor is formed. . The present inventors have conducted intensive studies to overcome the problems of the prior art, and as a result, by blending melamine in a specific ratio into an insulating paint containing a polyimide resin (including a precursor), the above object was achieved. The present inventors have found what can be achieved, and have completed the present invention based on the knowledge.
【０００７】[0007]
【課題を解決するための手段】本発明によれば、ポリイ
ミド系樹脂と溶剤とを含有するポリイミド系絶縁塗料に
おいて、ポリイミド系樹脂１００重量部に対して、メラ
ミン０．１〜２０重量部を添加してなることを特徴とす
るポリイミド系絶縁塗料が提供される。また、本発明に
よれば、銅導体上にポリイミド系絶縁塗料を塗布し、焼
き付けた絶縁電線において、ポリイミド系絶縁塗料が、
ポリイミド系樹脂１００重量部に対して、メラミン０．
１〜２０重量部を添加してなるポリイミド系絶縁塗料で
あることを特徴とする絶縁電線が提供される。According to the present invention, in a polyimide insulating coating containing a polyimide resin and a solvent, 0.1 to 20 parts by weight of melamine is added to 100 parts by weight of the polyimide resin. The present invention provides a polyimide-based insulating paint characterized by comprising: Further, according to the present invention, a polyimide-based insulating paint is applied to a copper conductor, and in a baked insulated wire, the polyimide-based insulating paint is
Melamine 0.1 to 100 parts by weight of polyimide resin.
An insulated wire characterized by being a polyimide-based insulating paint to which 1 to 20 parts by weight is added is provided.
【０００８】[0008]
【発明の実施の形態】本発明で使用するポリイミド系樹
脂としては、ポリイミド、ポリエステルイミド、ポリア
ミドイミド、ポリエステルアミドイミドなどの分子鎖中
にイミド結合を有する樹脂またはその前駆体を挙げるこ
とができる。これらの中でも、ポリイミド前駆体や溶媒
可溶性ポリイミドが好ましく、機械的強度や耐熱性、耐
薬品性などの観点から、ポリイミド前駆体が特に好まし
い。ポリイミド前駆体は、一般に、酸成分としてテトラ
カルボン酸またはその無水物を用い、アミン成分として
ジアミン化合物を用いて、両者を無水の条件下、極性有
機溶媒中、０〜１００℃で重縮合することにより合成さ
れるものであって、ポリアミド酸またはポリアミック酸
とも呼ばれている。ポリイミド前駆体を含有するポリイ
ミドワニスを銅導体上に塗布し、焼き付けると、ポリア
ミド酸が脱水閉環してポリイミドとなる。BEST MODE FOR CARRYING OUT THE INVENTION Examples of the polyimide resin used in the present invention include a resin having an imide bond in a molecular chain such as polyimide, polyesterimide, polyamideimide, and polyesteramideimide, or a precursor thereof. Among these, a polyimide precursor and a solvent-soluble polyimide are preferable, and a polyimide precursor is particularly preferable in terms of mechanical strength, heat resistance, chemical resistance, and the like. The polyimide precursor is generally polycondensed at 0 to 100 ° C. in a polar organic solvent under anhydrous conditions, using tetracarboxylic acid or its anhydride as an acid component, and using a diamine compound as an amine component. And also called polyamic acid or polyamic acid. When a polyimide varnish containing a polyimide precursor is applied on a copper conductor and baked, the polyamic acid is dehydrated and closed to form polyimide.
【０００９】テトラカルボン酸またはその無水物として
は、例えば、ピロメリット酸二無水物、３，３′，４，
４′−ベンゾフェノンテトラカルボン酸二無水物、ベン
ゼン−１，２，３，４−テトラカルボン酸二無水物、ナ
フタレン−２，３，６，７−テトラカルボン酸二無水
物、３，３′，４，４′−ジフェニルテトラカルボン酸
二無水物、２，２″，３，３″−ｐ−テルフェニルテト
ラカルボン酸二無水物、２，２−ビス（２，３−ジカル
ボキシフェニル）−プロパン二無水物、ビス（２，３−
ジカルボキシフェニル）エーテル二無水物、ビス（２，
３−ジカルボキシフェニル）メタン二無水物、３，
３′，４，４′−ジフェニルスルホンテトラカルボン酸
二無水物、ビス（２，３−ジカルボキシフェニル）スル
ホン二無水物、１，１−ビス（２，３−ジカルボキシフ
ェニル）エタン二無水物、ペリレン−３，４，９，１０
−テトラカルボン酸二無水物。フェナンスレン−１，
２，７，８−テトラカルボン酸二無水物などの芳香族テ
トラカルボン酸二無水物；シクロペンタン−１，２，
３，４−テトラカルボン酸二無水物などの脂環式酸無水
物；ピラジン−２，３，５，６−テトラカルボン酸二無
水物などの複素環誘導体などが挙げられる。これらの酸
成分は、それぞれ単独で、あるいは２種以上を組み合わ
せて使用することができる。As the tetracarboxylic acid or its anhydride, for example, pyromellitic dianhydride, 3,3 ', 4,
4'-benzophenonetetracarboxylic dianhydride, benzene-1,2,3,4-tetracarboxylic dianhydride, naphthalene-2,3,6,7-tetracarboxylic dianhydride, 3,3 ', 4,4'-diphenyltetracarboxylic dianhydride, 2,2 ", 3,3" -p-terphenyltetracarboxylic dianhydride, 2,2-bis (2,3-dicarboxyphenyl) -propane Dianhydride, bis (2,3-
Dicarboxyphenyl) ether dianhydride, bis (2,
3-dicarboxyphenyl) methane dianhydride, 3,
3 ', 4,4'-diphenylsulfonetetracarboxylic dianhydride, bis (2,3-dicarboxyphenyl) sulfone dianhydride, 1,1-bis (2,3-dicarboxyphenyl) ethane dianhydride , Perylene-3,4,9,10
-Tetracarboxylic dianhydride. Phenanthrene-1,
Aromatic tetracarboxylic dianhydrides such as 2,7,8-tetracarboxylic dianhydride; cyclopentane-1,2,2
Alicyclic acid anhydrides such as 3,4-tetracarboxylic dianhydride; and heterocyclic derivatives such as pyrazine-2,3,5,6-tetracarboxylic dianhydride. These acid components can be used alone or in combination of two or more.
【００１０】ジアミン化合物としては、例えば、２，２
−ジ（ｐ−アミノフェニル）−６，６′−ビスベンゾオ
キサゾール、ｍ−フェニレンジアミン、４，４′−ジア
ミノジフェニルプロパン、２，２−ビス〔４−（４−ア
ミノフェノキシ）フェニル〕プロパン、４，４′−ジア
ミノジフェニルスルホン、４，４′−ジアミノジフェニ
ルエーテル、ベンジジン、４，４″−ジアミノ−ｐ−テ
ルフェニル、ｐ−ビス（２−メチル−４−アミノペンチ
ル）ベンゼン、１，５−ジアミノナフタレン、２，４−
ジアミノトルエン、ｍ−キシレン−２，５−ジアミン、
ｍ−キシリレンジアミンなどの芳香族ジアミン；ピペラ
ジン、メチレンジアミン、エチレンジアミン、テトラメ
チレンジアミンなどの脂肪族ジアミンなどが挙げられ
る。これらのアミン成分は、それぞれ単独で、あるいは
２種以上を組み合わせて使用することができる。As the diamine compound, for example, 2,2
-Di (p-aminophenyl) -6,6'-bisbenzoxazole, m-phenylenediamine, 4,4'-diaminodiphenylpropane, 2,2-bis [4- (4-aminophenoxy) phenyl] propane, 4,4'-diaminodiphenyl sulfone, 4,4'-diaminodiphenyl ether, benzidine, 4,4 "-diamino-p-terphenyl, p-bis (2-methyl-4-aminopentyl) benzene, 1,5- Diaminonaphthalene, 2,4-
Diaminotoluene, m-xylene-2,5-diamine,
aromatic diamines such as m-xylylenediamine; aliphatic diamines such as piperazine, methylenediamine, ethylenediamine, and tetramethylenediamine. These amine components can be used alone or in combination of two or more.
【００１１】溶剤としては、例えば、Ｎ−メチル−２−
ピロリドン、Ｎ，Ｎ−ジメチルアセトアミド、Ｎ，Ｎ−
ジメチルホルムアミド、ジメチルスルホキシド、テトラ
メチル尿素、ヘキサエチルりん酸トリアミド、γ−ブチ
ロラクトンなどの極性有機溶剤が挙げられる。これらの
極性有機溶剤のほかには、アセトン、メチルエチルケト
ン、メチルイソブチルケトン、シクロへキサノンなどの
ケトン類；酢酸メチル、酢酸エチル、酢酸ブチル、蓚酸
ジエチルなどのエステル類；ジエチルエーテル、エチレ
ングリコールジメチルエーテル、ジエチレングリコール
モノメチルエーテル、ジエチレングリコールジメチルエ
ーテル、テトラヒドロフランなどのエーテル類；ジクロ
ロメタン、クロルベンゼンなどのハロゲン化炭化水素
類；ヘキサン、ヘプタン、ベンゼン、トルエン、キシレ
ンなどの炭化水素類；クレゾール、クロルフェノールな
どのフェノール類；ピリジンなどの第３級アミン類など
が挙げられる。これらの溶剤は、それぞれ単独で、ある
いは２種以上を組み合わせて使用することができる。溶
剤の使用量は、少なくともポリイミド系樹脂などの各成
分を均一に溶解ないしは分散するに足る量である。As the solvent, for example, N-methyl-2-
Pyrrolidone, N, N-dimethylacetamide, N, N-
Examples include polar organic solvents such as dimethylformamide, dimethylsulfoxide, tetramethylurea, hexaethylphosphoric triamide, and γ-butyrolactone. In addition to these polar organic solvents, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone; esters such as methyl acetate, ethyl acetate, butyl acetate, diethyl oxalate; diethyl ether, ethylene glycol dimethyl ether, diethylene glycol Ethers such as monomethyl ether, diethylene glycol dimethyl ether and tetrahydrofuran; halogenated hydrocarbons such as dichloromethane and chlorobenzene; hydrocarbons such as hexane, heptane, benzene, toluene and xylene; phenols such as cresol and chlorophenol; pyridine and the like And tertiary amines. These solvents can be used alone or in combination of two or more. The amount of the solvent used is an amount sufficient to uniformly dissolve or disperse at least each component such as a polyimide resin.
【００１２】本発明では、ポリイミド系樹脂の銅導体に
対する密着性を改善するために、ポリイミド系絶縁塗料
に、メラミン（すなわち、２，４，６−トリアミノトリ
アジン；Ｃ3Ｎ6Ｈ6）を添加する。メラミンの使用割合
は、ポリイミド系樹脂（ポリイミド前駆体を含む）１０
０重量部に対して、０．１〜２０重量部、好ましくは
０．３〜１５重量部、より好ましくは０．５〜１０重量
部である。メラミンの使用割合が小さすぎると、銅導体
への密着性改善効果が小さく、大きすぎると、耐熱性、
機械的物性などが低下したり、劣化しやすくなるおそれ
が生じる。In the present invention, in order to improve the adhesion of the polyimide resin to the copper conductor, melamine (that is, 2,4,6-triaminotriazine; C 3 N 6 H 6 ) is added to the polyimide insulating paint. Added. Melamine is used in a polyimide resin (including a polyimide precursor) of 10
The amount is 0.1 to 20 parts by weight, preferably 0.3 to 15 parts by weight, more preferably 0.5 to 10 parts by weight with respect to 0 parts by weight. If the proportion of melamine is too small, the effect of improving the adhesion to the copper conductor is small, and if it is too large, heat resistance,
There is a possibility that the mechanical properties and the like are deteriorated and the material is liable to be deteriorated.
【００１３】本発明のポリイミド系絶縁塗料には、必要
に応じて、フィラー、酸化防止剤、硬化性改善剤、レベ
リング剤、接着助剤などの各種添加剤を含有させること
ができる。フィラーとしては、例えば、シリカ、アルミ
ナ、酸化マグネシウム、酸化ベリリウム、炭化ケイ素、
炭化チタン、炭化ホウ素、タングステンカーバイド、窒
化ホウ素、窒化ケイ素などを挙げることができる。絶縁
塗料の硬化性や流動性を改善するために、例えば、テト
ライソプロピルチタネート、テトラブチルチタネート、
テトラヘキシルチタネートなどチタン系化合物；ナフテ
ン酸亜鉛、オクテン酸亜鉛などの亜鉛系化合物；などを
添加することができる。これらの各種添加剤は、それぞ
れの機能に応じて、適宜の量比で添加することができ
る。The polyimide-based insulating coating of the present invention can contain various additives such as fillers, antioxidants, curability improvers, leveling agents, and adhesion aids, if necessary. As the filler, for example, silica, alumina, magnesium oxide, beryllium oxide, silicon carbide,
Examples thereof include titanium carbide, boron carbide, tungsten carbide, boron nitride, and silicon nitride. To improve the curability and fluidity of the insulating paint, for example, tetraisopropyl titanate, tetrabutyl titanate,
Titanium compounds such as tetrahexyl titanate; zinc compounds such as zinc naphthenate and zinc octenoate; and the like can be added. These various additives can be added at appropriate ratios according to the respective functions.
【００１４】本発明のポリイミド系絶縁塗料は、例え
ば、溶媒中でテトラカルボン酸二無水物とジアミン化合
物とを重合反応させてポリイミド前駆体とし、次いで、
メラミンを添加し、必要に応じて溶剤で希釈することに
より得ることができる。また、本発明のポリイミド系絶
縁塗料は、市販のポリイミドワニスにメラミンを添加す
ることにより調製することもできる。その際、その他の
添加剤は、必要に応じて添加することができる。ポリイ
ミド系絶縁塗料におけるポリイミド系樹脂の濃度は、通
常、１〜６０重量％、好ましくは５〜５０重量％、より
好ましくは１０〜４０重量％程度である。The polyimide-based insulating coating of the present invention is obtained by, for example, polymerizing a tetracarboxylic dianhydride and a diamine compound in a solvent to form a polyimide precursor.
It can be obtained by adding melamine and, if necessary, diluting with a solvent. Further, the polyimide-based insulating paint of the present invention can also be prepared by adding melamine to a commercially available polyimide varnish. At that time, other additives can be added as needed. The concentration of the polyimide resin in the polyimide insulating paint is usually about 1 to 60% by weight, preferably about 5 to 50% by weight, and more preferably about 10 to 40% by weight.
【００１５】銅導体上へのポリイミド系絶縁塗料の塗布
・焼き付けは、常法に従って行うことができる。本発明
の目的を損なわない範囲において、他の絶縁皮膜を下塗
りしたり、保護皮膜を上塗りしたりすることもできる。
焼き付け後の絶縁皮膜の厚みは、通常、５〜１００μ
ｍ、好ましくは１０〜８０μｍ、より好ましくは１５〜
５０μｍ程度である。銅導体としては、通常、銅線が用
いられる。本発明の絶縁電線は、焼き付けしたポリイミ
ド系樹脂皮膜と銅導体との密着性に優れており、巻線工
程で損傷を受けにくいため、モーターのコアに多くの絶
縁電線を巻き付けることができる。また、本発明の絶縁
電線は、ポリイミド系樹脂皮膜が本来有している耐摩耗
性などの機械的物性、耐熱性、耐薬品性、耐油性などの
諸物性が保持されている。The application and baking of the polyimide insulating paint on the copper conductor can be performed according to a conventional method. As long as the object of the present invention is not impaired, another insulating film may be undercoated or a protective film may be overcoated.
The thickness of the insulating film after baking is usually 5 to 100 μm.
m, preferably 10 to 80 μm, more preferably 15 to
It is about 50 μm. Usually, a copper wire is used as the copper conductor. INDUSTRIAL APPLICABILITY The insulated wire of the present invention has excellent adhesion between the baked polyimide resin film and the copper conductor, and is not easily damaged in the winding process, so that many insulated wires can be wound around the motor core. Further, the insulated wire of the present invention retains mechanical properties such as abrasion resistance inherent to the polyimide resin film, and various properties such as heat resistance, chemical resistance, and oil resistance.
【００１６】[0016]
【実施例】以下に実施例を挙げて、本発明についてより
具体的に説明するが、本発明は、これらの実施例のみに
限定されるものではない。EXAMPLES The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to only these examples.
【００１７】［実施例１］ＰｙｒｅＭＬワニス（ＩＳＴ
製）１０００ｇ（樹脂分１５重量％）に、メラミン（日
産化学製、微粉末メラミン）１．５ｇ（樹脂１００重量
部当たり１．０重量部）を加え、室温にて１時間攪拌す
ることにより、絶縁塗料を調製した。上記絶縁塗料を、
直径１．３ｍｍの銅導体表面に、常法により塗布し、４
００℃で３０秒間焼き付けすることにより、厚み２５μ
ｍの絶縁皮膜を有する絶縁電線を作製した。[Example 1] PyreML varnish (IST)
Melamine (Nissan Chemical Industries, fine powdered melamine) 1.5 g (1.0 part by weight per 100 parts by weight of resin) was added to 1000 g (resin content 15% by weight), and stirred at room temperature for 1 hour, An insulating paint was prepared. The above insulating paint,
Apply to a copper conductor surface with a diameter of 1.3 mm by a usual method,
By baking at 00 ° C for 30 seconds, a thickness of 25μ
An insulated wire having an insulating coating of m was prepared.
【００１８】［比較例１］絶縁塗料として、ＰｙｒｅＭ
Ｌワニスをそのまま用いたこと以外は、実施例１と同様
にして絶縁電線を作製した。Comparative Example 1 PyreM was used as an insulating paint.
An insulated wire was produced in the same manner as in Example 1, except that the L varnish was used as it was.
【００１９】［比較例２］絶縁塗料として、ＰｙｒｅＭ
Ｌワニス１０００ｇに、メラミン樹脂（住友化学製Ｍ−
１００Ｃ）を１．５ｇ（樹脂１００重量部当たり１．０
重量部）を加え、室温にて１時間攪拌することにより得
た絶縁塗料を用いたこと以外は、実施例１と同様にして
絶縁電線を作製した。Comparative Example 2 PyreM was used as an insulating paint.
Melamine resin (M-Sumitomo Chemical M-
100C) of 1.5 g (1.0 per 100 parts by weight of resin).
Parts by weight) and stirred for 1 hour at room temperature to prepare an insulated wire in the same manner as in Example 1.
【００２０】＜耐加工性簡易評価法＞以上によって作製
した各絶縁電線について、巻線工程で絶縁皮膜が受ける
衝撃を模擬した耐加工性簡易評価法により評価した。図
１に示すように、絶縁電線１を金属製の壁２に押し当
て、金属棒３の一端を絶縁電線の絶縁皮膜上に接触させ
る。金属棒３が絶縁皮膜に接触するエッジ４の形状は、
１．３Ｒのアールを持たせてある。金属棒３を上からＦ
の力で押え（Ｆ＝１．５〜２．０ｋｇ）、次に、絶縁電
線１を矢印５方向にＶの速度（Ｖ＝８ｍｍ／秒）で引っ
張り、５ｍｍの長さだけ移動させる。絶縁電線１と金属
棒３との角度θは、４５°とした。<Easy Evaluation Method of Work Resistance> Each of the insulated wires produced as described above was evaluated by a simple evaluation method of work resistance simulating an impact applied to an insulating film in a winding step. As shown in FIG. 1, an insulated wire 1 is pressed against a metal wall 2, and one end of a metal rod 3 is brought into contact with an insulating film of the insulated wire. The shape of the edge 4 where the metal bar 3 contacts the insulating film is
It has a 1.3R radius. Move the metal rod 3 from above to F
Then, the insulated wire 1 is pulled in the direction of arrow 5 at a speed V (V = 8 mm / sec) and moved by a length of 5 mm. The angle θ between the insulated wire 1 and the metal rod 3 was 45 °.
【００２１】次に、上記のようにして、絶縁電線の絶縁
皮膜に損傷を与えた後、図２に示すように、傷６を持つ
絶縁電線１を３重量％の食塩水７の中に浸漬し、３Ｖの
電流を通して、電流計８により、漏れ電流（ｍＡ）を測
定した。漏れ電流の大きさが大きいほど、絶縁皮膜の損
傷が大きく、銅導体に対する絶縁皮膜の密着性が悪いこ
とを示す。したがって、漏れ電流の測定値が小さいほ
ど、絶縁皮膜の銅導体に対する密着性に優れていること
を示す。結果を表１に示す。Next, after damaging the insulating film of the insulated wire as described above, as shown in FIG. 2, the insulated wire 1 having the flaw 6 is immersed in a 3% by weight saline solution 7. Then, a leakage current (mA) was measured by the ammeter 8 through a current of 3 V. The larger the magnitude of the leakage current, the greater the damage of the insulating film, indicating that the adhesion of the insulating film to the copper conductor is poor. Therefore, the smaller the measured value of the leakage current, the better the adhesion of the insulating film to the copper conductor. Table 1 shows the results.
【００２２】[0022]
【表１】 [Table 1]
【００２３】表１の結果から明らかなように、添加剤を
入れない場合（比較例１）には、漏れ電流の値は大き
く、また、従来のメラミン樹脂を添加した場合（比較例
２）には、漏れ電流の値がそれほど小さくなっておら
ず、いずれも耐加工性（密着性）が不充分であることが
わかる。これに対して、メラミンを添加した場合（実施
例１）には、漏れ電流の値が著しく小さくなっており、
耐加工性（密着性）が顕著に改善されている。As is clear from the results shown in Table 1, when no additive was added (Comparative Example 1), the value of the leakage current was large, and when the conventional melamine resin was added (Comparative Example 2). It is understood that the values of the leakage currents were not so small, and that all of them had insufficient processing resistance (adhesion). On the other hand, when melamine was added (Example 1), the value of the leakage current was extremely small,
Processing resistance (adhesion) is remarkably improved.
【００２４】[0024]
【発明の効果】本発明によれば、機械的強度、耐熱性、
耐薬品性などに優れると共に、銅導体との密着性が顕著
に優れた絶縁皮膜を形成することができるポリイミド系
絶縁塗料が提供される。また、本発明によれば、機械的
強度、耐熱性、耐薬品性などに優れると共に、銅導体と
の密着性が顕著に優れたポリイミド系絶縁皮膜が形成さ
れた絶縁電線が提供される。本発明の絶縁電線は、モー
ターの小型化や高出力化の要求に充分に応えることがで
る。According to the present invention, mechanical strength, heat resistance,
Provided is a polyimide-based insulating paint that is excellent in chemical resistance and the like and that can form an insulating film having excellent adhesion to a copper conductor. Further, according to the present invention, there is provided an insulated wire on which a polyimide-based insulating film having excellent mechanical strength, heat resistance, chemical resistance, and the like, and excellent adhesion to a copper conductor is formed. INDUSTRIAL APPLICABILITY The insulated wire of the present invention can sufficiently respond to the demand for downsizing and high output of a motor.
【図１】図１は、絶縁電線の耐加工性簡易評価法を示す
説明図である。BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing a simple method for evaluating the workability of an insulated wire.
【図２】図２は、絶縁電線の漏れ電流の評価法を示す説
明図である。FIG. 2 is an explanatory view showing a method for evaluating a leakage current of an insulated wire;
１：絶縁電線 ２：壁（金属製） ３：金属棒 ４：金属エッジ（１．３Ｒ） ５：絶縁電線を引っ張る方向 ６：絶縁皮膜につけられた傷 ７：３％食塩水 ８：電流計 1: Insulated wire 2: Wall (made of metal) 3: Metal rod 4: Metal edge (1.3R) 5: Pulling direction of insulated wire 6: Scratches made on insulating film 7: 3% saline 8: Ammeter
Claims (2)
リイミド系絶縁塗料において、ポリイミド系樹脂１００
重量部に対して、メラミン０．１〜２０重量部を添加し
てなることを特徴とするポリイミド系絶縁塗料。1. A polyimide-based insulating coating material containing a polyimide-based resin and a solvent, comprising:
A polyimide-based insulating paint comprising 0.1 to 20 parts by weight of melamine added to parts by weight.
し、焼き付けた絶縁電線において、ポリイミド系絶縁塗
料が、ポリイミド系樹脂１００重量部に対して、メラミ
ン０．１〜２０重量部を添加してなるポリイミド系絶縁
塗料であることを特徴とする絶縁電線。2. An insulated wire in which a polyimide-based insulating paint is applied to a copper conductor and baked, wherein the polyimide-based insulating paint is prepared by adding 0.1 to 20 parts by weight of melamine to 100 parts by weight of the polyimide-based resin. An insulated wire, characterized by being a polyimide-based insulating paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15917297A JP3724922B2 (en) | 1997-06-02 | 1997-06-02 | Polyimide-based insulating paint and insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15917297A JP3724922B2 (en) | 1997-06-02 | 1997-06-02 | Polyimide-based insulating paint and insulated wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10334735A true JPH10334735A (en) | 1998-12-18 |
| JP3724922B2 JP3724922B2 (en) | 2005-12-07 |
Family
ID=15687870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15917297A Expired - Fee Related JP3724922B2 (en) | 1997-06-02 | 1997-06-02 | Polyimide-based insulating paint and insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3724922B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005302598A (en) * | 2004-04-14 | 2005-10-27 | Hitachi Cable Ltd | Enameled wire and insulating coating used for it |
| KR100870310B1 (en) * | 2007-04-27 | 2008-11-25 | 엘에스전선 주식회사 | Insulated electric wire |
| JP2009218201A (en) * | 2008-02-13 | 2009-09-24 | Hitachi Cable Ltd | Insulation wire and insulating varnish used for it |
| JP2011029100A (en) * | 2009-07-29 | 2011-02-10 | Hitachi Cable Ltd | Enamel-covered insulated wire and its manufacturing method |
| CN102985982A (en) * | 2010-06-03 | 2013-03-20 | Ls电线有限公司 | Insulated electric wire |
| US8685536B2 (en) | 2005-04-25 | 2014-04-01 | Hitachi Metals, Ltd. | Polyamide-imide resin insulating coating material, insulated wire and method of making the same |
| US8871343B2 (en) | 2005-04-25 | 2014-10-28 | Hitachi Metals, Ltd. | Partial-discharge-resistant insulating varnish, insulated wire and method of making the same |
-
1997
- 1997-06-02 JP JP15917297A patent/JP3724922B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005302598A (en) * | 2004-04-14 | 2005-10-27 | Hitachi Cable Ltd | Enameled wire and insulating coating used for it |
| US8685536B2 (en) | 2005-04-25 | 2014-04-01 | Hitachi Metals, Ltd. | Polyamide-imide resin insulating coating material, insulated wire and method of making the same |
| US8871343B2 (en) | 2005-04-25 | 2014-10-28 | Hitachi Metals, Ltd. | Partial-discharge-resistant insulating varnish, insulated wire and method of making the same |
| US9080073B2 (en) | 2005-04-25 | 2015-07-14 | Hitachi Metals, Ltd. | Method of making partial-discharge-resistant insulated wire |
| KR100870310B1 (en) * | 2007-04-27 | 2008-11-25 | 엘에스전선 주식회사 | Insulated electric wire |
| JP2009218201A (en) * | 2008-02-13 | 2009-09-24 | Hitachi Cable Ltd | Insulation wire and insulating varnish used for it |
| US8449978B2 (en) * | 2008-02-13 | 2013-05-28 | Hitachi Cable, Ltd. | Insulated wire and insulating varnish used therefor |
| JP2011029100A (en) * | 2009-07-29 | 2011-02-10 | Hitachi Cable Ltd | Enamel-covered insulated wire and its manufacturing method |
| US8629352B2 (en) | 2009-07-29 | 2014-01-14 | Hitachi Cable, Ltd. | Enameled insulated wire and manufacturing method thereof |
| CN102985982A (en) * | 2010-06-03 | 2013-03-20 | Ls电线有限公司 | Insulated electric wire |
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| Publication number | Publication date |
|---|---|
| JP3724922B2 (en) | 2005-12-07 |
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