JPS5851419A - Method of producing electrically insulating conductor - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 亨発明は電気絶ｌ１ｋｌｌＦ体の製造法に関する。さら
に評し、くは、本発明は電気泳動法を利用した電気絶縁
導体の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an electrically isolated l1kllF body. More specifically, the present invention relates to a method for manufacturing an electrically insulated conductor using electrophoresis.

従来、電気機器に用いる電気絶縁導体は、電気導体を無
機、有機または無機−有機複合系の多孔質絶縁材に巻回
したコイルに含浸樹脂を含浸させたのち、加熱硬化させ
て製造されている。しかし、この製造法には電気導体を
多孔質絶縁材に巻回する工程に多くの人手を要し、かつ
作業能率がきわめて低いという欠点があった。Conventionally, electrically insulated conductors used in electrical equipment are manufactured by impregnating a coil with an impregnating resin in which the electrical conductor is wound around an inorganic, organic, or inorganic-organic composite porous insulating material, and then heating and curing the coil. . However, this manufacturing method has the drawback that the process of winding the electrical conductor around the porous insulating material requires a lot of manpower and the work efficiency is extremely low.

本発明者らはこれまでに、前記従来の製造法の欠点の１
つである電気導体を多孔質絶縁材に巻回する工程を省く
ことのできる電気絶縁導体の製造法として、！イカ粉と
水分散ワニスな水中に分散させてえられる電着塗料を用
い、電気泳動法によって電気導体表面に絶縁層を形成さ
せる方法を開発してきている（特開昭５５−９２１２９
８号、特開昭５１−３９１７８号および特開昭５１−１
１４６０２号の各公報参照）。The present inventors have previously investigated one of the drawbacks of the conventional manufacturing method.
As a manufacturing method for electrically insulated conductors that can omit the process of winding the electrical conductor around a porous insulating material! We have developed a method for forming an insulating layer on the surface of an electrical conductor by electrophoresis using squid powder and a water-dispersed varnish, which is obtained by dispersing electrodeposition paint in water (Japanese Patent Laid-Open No. 55-92129).
No. 8, JP-A-51-39178 and JP-A-51-1
(Refer to each publication of No. 14602).

しかし、それらの方法では形成できる絶縁層の厚さが制
限されており、たとえば高圧回転機などの高電圧を印加
される電気機器に用いられる電気絶縁導体において要求
される絶縁層の厚さをつることができない。すなわち、
それらの方法によれば均一な電着析出層がえられるのは
約１．０！Ｉｎ！１程度までであり、それよりも厚い電
着析出層をえようとするばあいには電着析出層の含水率
が高くなるため、そのしまりがわるく、電着塗料から引
き上げる際にタレ現象を生じてしまう。However, the thickness of the insulating layer that can be formed using these methods is limited. I can't. That is,
According to those methods, a uniform electrodeposited layer can be obtained at a rate of about 1.0! In! If you try to get an electrodeposited layer thicker than that, the water content of the electrodeposited layer will increase, making it less compact and causing a sagging phenomenon when it is removed from the electrodeposition paint. It will happen.

本発明者らはかかる電気泳動法を用いた電気絶縁導体の
製造法の問題点を克服すべく鋭意研究を重ねた結果、！
イカ粉と粒径の異なる２種以上の水分散ワニスを使用す
ることにより、電着析出層の膜厚を大きくできることを
見出し、本発明を完成するにいたった。The inventors of the present invention have conducted intensive research to overcome the problems of the method of manufacturing electrically insulated conductors using such electrophoresis method, and as a result,!
It was discovered that the thickness of the electrodeposited layer could be increased by using squid powder and two or more water-dispersed varnishes with different particle sizes, and the present invention was completed.

すなわち本発明は、 ！イカ粉および固形分の粒子径の異なる２種の水分散ワ
ニスを水中に分散してえられる電着塗料に、電気導体を
浸漬し、電気泳動法により電気導体表面に電着析出層を
形成させ加熱乾燥したのち、含浸樹脂を含浸させ加熱硬
化させることを特徴とする電気絶縁導体の製造法に関す
る。In other words, the present invention is! An electrical conductor is immersed in an electrodeposition paint obtained by dispersing squid powder and two types of water-dispersed varnish with different solid particle sizes in water, and an electrodeposition layer is formed on the surface of the electrical conductor by electrophoresis. The present invention relates to a method for producing an electrically insulated conductor, which comprises heating and drying, then impregnating with an impregnating resin and curing by heating.

本発明によれば、電着析出層の含水率が低くなるため電
着析出層のしまりがよくなり、２Ｍ以上の膜厚を形成さ
せても、従来のようなタレ現象を生ずることがない。ま
たえられる電着析出層に対する含′ｆ！樹脂の浸透性も
゛よい。According to the present invention, since the water content of the electrodeposited layer is lowered, the electrodeposited layer has better compactness, and even if a film thickness of 2M or more is formed, the sagging phenomenon as in the conventional case does not occur. Contains no more than the electrodeposited layer. The resin has good permeability.

！イカ粉末の粒径は、３５メツシユ篩を通過するものが
好ましく、それよりも大きな粒子径を有するものを使用
したばあい、電着析出層のしまりがわるくなり、また均
一な膜厚をうろことができなくなる。! The particle size of the squid powder is preferably one that can pass through a 35 mesh sieve; if a particle size larger than that is used, the density of the electrodeposited layer will be poor, and it will be difficult to maintain a uniform film thickness. become unable to do so.

水分散ワニスはエポキシエステル系ワニス、アクリル系
ワニス、ポリエステル系ワニスなどが好適に用いられる
。これらのワニスはその固形分の粒子径の小さなものお
よび粒子径の大きなものの２種が用いられるが、前者は
約０．００５〜０．０２Ｐの範囲の粒子径のものが好ま
しく、後者は約０．０４−Ｑ、ｊＱｐｎの範囲の粒子径
のものが好ましい。粒子径の小さな水分散ワニスとして
、粒子径がＱ、ＱＱ５７ｍ未満のものを用いると電着析
出層中でのマイカ含有率が小さくなり、含浸樹脂の含浸
性が低下し、かつえられる電気絶縁導体の熱的および電
気的特性がわるくなる。粒子径が０．０２Ｉｊｘｎより
も大きいものを用いると電着析出層の含水率が高くなり
、所望の膜厚をうろことができなくなる。粒子径の大き
な水分散ワニスとして、粒子径が０．０４ｐｒｎ未溝の
ものを用いると電着析出層中のマイカ含有率の分布が不
均一になり、その結果、電着浴から引き上げる際にタレ
現象などが生ずる。粒子径が０．１０ｘよりも大きいも
のを用いると電着析出層の含水率が高くなり、電着浴か
ら引き上ける際にタレ現象などが生ずる。As the water-dispersed varnish, epoxy ester varnish, acrylic varnish, polyester varnish, etc. are preferably used. Two types of these varnishes are used: one with a small solid content and one with a large particle diameter. The former preferably has a particle diameter in the range of about 0.005 to 0.02P, and the latter has a particle diameter in the range of about 0.02P. Preferably, the particle size is in the range of .04-Q, jQpn. If a water-dispersed varnish with a particle size of less than Q, QQ of 57 m is used, the mica content in the electrodeposited layer will be small, the impregnating property of the impregnating resin will be reduced, and the resulting electrically insulated conductor will be Thermal and electrical properties deteriorate. If a particle size larger than 0.02Ijxn is used, the water content of the electrodeposited layer will be high, making it impossible to achieve the desired thickness. If an ungrooved water-dispersed varnish with a particle diameter of 0.04 prn is used, the distribution of the mica content in the electrodeposited layer will be uneven, resulting in sagging when it is removed from the electrodeposition bath. Phenomena etc. occur. If particles with a particle size larger than 0.10x are used, the water content of the electrodeposited layer will be high, and a sagging phenomenon will occur when the electrodeposited layer is pulled up from the electrodeposition bath.

粒子径の小さい水分散ワニスと粒子径の大きな水分散ワ
ニスの使用量の割合は、粒子径の大きな水分散ワニス１
００重量部（固形分として）に対し、粒子径の小さい水
分散ワニス２０〜１２０重量部（固形分として）を用い
るのが好適である。後者を２０重量部未満で用いると電
着析出層の含水率が高くなり、１２０重量部よりも多く
用いるとマイカ含有率の分布が不均一となり、いずれの
ばあいも電着浴から引き上げる際にタレ現象が生じるた
め好ましくない。The ratio of the water-dispersed varnish with small particle size and the water-dispersed varnish with large particle size is 1
It is preferable to use 20 to 120 parts by weight (as solid content) of a water-dispersed varnish having a small particle size per 00 parts by weight (as solid content). If the latter is used in an amount less than 20 parts by weight, the water content of the electrodeposited layer will be high, and if it is used in an amount greater than 120 parts by weight, the distribution of the mica content will be uneven. This is not preferable because it causes a sagging phenomenon.

つぎに製造例、実施例および比較例をあげて本発明をよ
り詳細に説明するが、本発明はそれらの実施例のみに限
定されるものではない。なお以下の製造例、実施例およ
び比較例において部ば重量部であり、噂は重量％である
。Next, the present invention will be explained in more detail with reference to Production Examples, Examples, and Comparative Examples, but the present invention is not limited to these Examples. In the following production examples, examples, and comparative examples, parts are parts by weight, and rumors are parts by weight.

製造例１ （エポキシエステル系水分散ワニスの製造）エピコート
（米国シェルケミカル社製）１００部、テトラヒドロ無
水７タルａ！２５部およびエチレングリコール６部を１
４０〜１５０°０で約１時間加熱反応させて酸価３０〜
６０のエポキシエステル樹脂をえた。このものにキシレ
ン２０部およびアセトン５゜部を加え、１２０°Ｏで加
熱しながら均一溶液とした。Production Example 1 (Production of epoxy ester water-dispersed varnish) 100 parts of Epikote (manufactured by Shell Chemical Company, USA), 7 tal of tetrahydro anhydride a! 25 parts and 6 parts of ethylene glycol in 1
Heat the reaction at 40~150°0 for about 1 hour to achieve an acid value of 30~
60 epoxy ester resin was obtained. 20 parts of xylene and 5 parts of acetone were added to this mixture and heated at 120°O to form a homogeneous solution.

ツキニコの浴液を約０．２％のアンモニウム含ｔｒ　６
０〜８０°０の温水中に攪拌しながら加えて分散させた
のち、チッ素ガスをバブリングさせてアンモニアを揮散
させ、ｐＨ７，０〜８．０の水分散ワニスをえた。Tsukiniko's bath liquid contains about 0.2% ammonium tr 6
After adding and dispersing the mixture into hot water at a temperature of 0 to 80°0 while stirring, ammonia was volatilized by bubbling nitrogen gas to obtain a water-dispersed varnish with a pH of 7.0 to 8.0.

水分散ワニスの粒子径はｐＨ１１節によって０．０５〜
０・０９Ｐの範囲とした。この水分散ワニスは、さらに
透析チューブにとり、純水中で雑イオンを除去し、比抵
抗２５００Ω・（至）に調節した。The particle size of water-dispersed varnish is 0.05 to 0.05 depending on pH 11.
The range was 0.09P. This water-dispersed varnish was further placed in a dialysis tube, and miscellaneous ions were removed in pure water, and the specific resistance was adjusted to 2500 Ω·(maximum).

製造例２ （アクリル系水分散ワニスの製造） ラウリル硫酸エステルソーダ１．０部およびイオン交換
水５００部からなる混合物をチッ素気流中で６０分間攪
拌し、ついでアクリロニトリル５０部、スチレン３５Ｍ
、エチルアクリレート１０部およびグリシジルメタクリ
レート５部を加え、さらに過硫酸アンモニウム０．５部
および亜硫酸水素ナトリウム０．１５部を水５０部に溶
解させた溶液を加えて７０°０で約６時間反応させ、卯
が約５．０の水分散ワニスをえた。この水分散ワニスは
、さらに透析チューブ（米国ビスキング社製のシームレ
ス七ル蓼−ズチューブ）にとり、純水中で雑イオンを除
去し、比抵抗的２００００・（至）にｌ１１ｉｌｉ′Ｉ
シた。Production Example 2 (Production of acrylic water-dispersed varnish) A mixture of 1.0 part of sodium lauryl sulfate and 500 parts of ion-exchanged water was stirred in a nitrogen stream for 60 minutes, and then 50 parts of acrylonitrile and 35M styrene were added.
, 10 parts of ethyl acrylate and 5 parts of glycidyl methacrylate were added, and a solution of 0.5 parts of ammonium persulfate and 0.15 parts of sodium bisulfite dissolved in 50 parts of water was added, and the mixture was reacted at 70° 0 for about 6 hours. The rabbit got about 5.0 water dispersion varnish. This water-dispersed varnish was further placed in a dialysis tube (seamless tube made by Visking in the United States), and miscellaneous ions were removed in pure water, resulting in a resistivity of 20,000.
Shita.

この水分散ワニスは乳化重合時に乳化剤としてのラウリ
ル硫酸エステルソーダの添加量を調節することにより、
約０．０１〜０．０２７ｍの所望の粒子径とすることが
できた。This water-dispersed varnish is produced by adjusting the amount of lauryl sulfate ester soda as an emulsifier during emulsion polymerization.
A desired particle size of about 0.01 to 0.027 m could be achieved.

実施例１ イオン交換水で充分に水洗した６５メッシニ通過の！イ
カ粉８５部、製造例１でえたエポキシエステル樹脂系水
分散ワニスをその固形分として１５部および製造例２で
えたアクリル樹脂系水分散７ニスをその固形分として２
部を混合し、ついで全不揮発分が１５％となる置のイオ
ン交換水を加えて充分に攪拌し、均一に分散した電着塗
料をえた。なお各水分散ワニス中の固形分の粒子径は、
エポキシエステル樹脂系水分散ワニスでは０．０５１Ｒ
ｎのものを用い、アクリル樹脂系水分散ワニスでは０．
０１．Ｈのものを用いた。Example 1 Passing 65 Messini thoroughly washed with ion-exchanged water! 85 parts of squid powder, 15 parts of the epoxy ester resin-based water-dispersed varnish obtained in Production Example 1 as its solid content, and 2 parts of the acrylic resin-based water-dispersed varnish obtained in Production Example 2 as its solid content.
Then, enough ion-exchanged water was added until the total nonvolatile content was 15%, and the mixture was sufficiently stirred to obtain a uniformly dispersed electrodeposition paint. The particle size of the solid content in each water-dispersed varnish is
0.051R for epoxy ester resin water dispersion varnish
n, and for acrylic resin water dispersion varnish, 0.
01. H was used.

この電着塗料液中に、あらかじめガラス繊維を機械巻き
した素線を成形して束ねた誘導電動機用コイルを浸漬し
、極間距１１１５０ｏｍで対向電極との間に直流電圧１
００ｖを２５秒間印加し、電着析出層を形成させた。つ
いでこのものを１５０°ａで１時間加熱乾燥させて、膜
厚１．０−の皮膜をえた。この電着析出層を形成させた
コイルをさらに、Ｂｐｏｎ８２８／ＨＩＪ２２００から
なるエポキシ樹脂液中に浸漬し、真空含浸したのち、加
熱硬化させて所望の電気絶縁導体をえた。An induction motor coil, which is made by forming and bundling strands of glass fiber mechanically wound in advance, is immersed in this electrodeposition coating solution, and a DC voltage of 1
00V was applied for 25 seconds to form an electrodeposited layer. This material was then heated and dried at 150 DEG a for 1 hour to obtain a film having a thickness of 1.0. The coil on which the electrodeposited layer was formed was further immersed in an epoxy resin solution consisting of Bpon828/HIJ2200, impregnated in vacuum, and then heated and cured to obtain a desired electrically insulated conductor.

実施例２ 直流電圧１００ｖの印加時間を５０秒間としたほかは実
施例１と同様にして実験を行ない、電気絶縁導体をえた
。Example 2 An electrically insulated conductor was obtained by carrying out an experiment in the same manner as in Example 1, except that the application time of a DC voltage of 100 V was changed to 50 seconds.

実施例３〜１０ 電着塗料の組成および直流電圧１００ｖの印加時間を第
１表に示すものに代えたほかは実施例１と同様にして実
験を行ない、電気絶縁導体をえた。Examples 3 to 10 Electrically insulated conductors were obtained by carrying out experiments in the same manner as in Example 1, except that the composition of the electrodeposition paint and the application time of 100 V DC voltage were changed to those shown in Table 1.

以上の実施例１〜１０において、電着析出層を形成後、
コイルを電着塗料から引き上ける際には電着析出層のタ
レ現象はまったくみられなかった。In the above Examples 1 to 10, after forming the electrodeposited layer,
When the coil was pulled up from the electrodeposited paint, no sagging phenomenon of the electrodeposited layer was observed.

またえられた電着析出層のマイカ粉の分布は均一であっ
た。Moreover, the distribution of mica powder in the electrodeposited layer obtained was uniform.

比較例１〜２ 電着塗料の組成および直流電圧１００ｖの印加時間を第
１表に示すものに代えたほかは実施例１と同様にして実
験を行ない、電気絶縁導体をえた。Comparative Examples 1 and 2 Electrically insulated conductors were obtained by carrying out experiments in the same manner as in Example 1, except that the composition of the electrodeposition paint and the application time of the DC voltage of 100 V were changed to those shown in Table 1.

電着析出層を形成後、コイルを電着塗料中から引き上げ
る際には、比較例１では若干のタレ現象がみられ、比較
例２ではかなりへタレ現象がみられた。またえられた電
着析出層のマイカ粉の分布は、比較例１および２の両者
とも不均一であった。When the coil was pulled out of the electrodeposition paint after forming the electrodeposited layer, a slight sagging phenomenon was observed in Comparative Example 1, and a considerable sagging phenomenon was observed in Comparative Example 2. Furthermore, the distribution of mica powder in the electrodeposited layer obtained was non-uniform in both Comparative Examples 1 and 2.

さらに比較例２では電着析出層に対する含浸゛樹脂の浸
透性がわるく、必要な樹脂皮膜を有する電気絶縁導体を
うろことができながった。Furthermore, in Comparative Example 2, the permeability of the impregnated resin into the electrodeposited layer was poor, and it was not possible to penetrate the electrically insulated conductor having the required resin film.

第１表に、実施例１〜１０および比較例１でそれぞれち
られた電気絶縁導体の特性を評価するため、初ＩＣｌ１
　ヨび２５０°Ｏで１６日間加熱劣化させたのちの絶縁
破壊電圧（ＢＭ）および誘電正接（ｔａｎδ）の値を示
す０それらの値かられかるように、実施例１〜１０で見
られた電気絶縁導体は劣化後も絶縁破壊電圧および誘電
正接の値に顕著な変化はみられないが、比較例１でえら
れた電気絶縁導体はそれらの値に顕著な変化がみられ、
電気絶縁層が熱によってかなり劣化することがわかる。Table 1 shows the initial ICl1
The values of dielectric breakdown voltage (BM) and dielectric loss tangent (tan δ) after heat deterioration at 250°O for 16 days are shown. Although the insulated conductor does not show any significant changes in the dielectric breakdown voltage and dielectric loss tangent values even after deterioration, the electrically insulated conductor obtained in Comparative Example 1 shows significant changes in these values.
It can be seen that the electrical insulation layer is considerably degraded by heat.

Claims (1)

【特許請求の範囲】 （１）マイカ粉および固形分の粒子径の異なる２種の水
分散Ｖ＝スを水中に分散してえられる電着塗料に、電気
導体を浸漬し、電気泳動法により電気導体表面に電着析
出層を形成させ加熱乾燥したのち、含浸樹脂を含浸させ
加熱硬化させることを特徴とする電気絶縁導体の製造法
。 （２）マイカ粉１００重量部に対し、水分散ワニスの固
形分５〜３０重量部を用いることを特徴とする特許請求
の範囲第（１）項記載の製造法。 （８）マイカ粉の粒径が３５メッシ：Ｌｍ通過のもので
ある特許請求の範囲第（１）項または第（２）項記載の
製造法。 （４）前記２種の水分散ワニスが固形分の粒子径ｏ、ｏ
ｏｓ〜０．０２Ｍの水分散ワニスおよび固形分の粒子径
０．０４　Ａ　Ｏ，１０７ａａの水分散ワニスである特
許請求の範囲第（１）項、第（２）項または第（８）項
記載の製造法。 （Ｓ）　ｍ記２種の水分散ワニスがエポキシエステル樹
脂系水分散ワニスおよびアクリル樹脂系水分散ワニスで
ある特許請求の範囲第（１）項、第（２）項、第、（８
）項または第（４）項記載の製造法。[Scope of Claims] (1) An electric conductor is immersed in an electrodeposition paint obtained by dispersing mica powder and two types of water-dispersed V=s with different solid content particle sizes in water, and then electrophoresis is performed. A method for producing an electrically insulated conductor, which comprises forming an electrodeposited layer on the surface of the electrical conductor, heating and drying it, and then impregnating it with an impregnating resin and heating and curing it. (2) The manufacturing method according to claim (1), characterized in that the solid content of the water-dispersed varnish is 5 to 30 parts by weight based on 100 parts by weight of mica powder. (8) The manufacturing method according to claim (1) or (2), wherein the mica powder has a particle size passing 35 mesh:Lm. (4) The two types of water-dispersed varnish have solid content particle diameters o, o
Claims (1), (2), or (8) describe a water-dispersed varnish with a solid content of os ~ 0.02 M and a solid content particle size of 0.04 A O, 107 aa. manufacturing method. (S) Claims (1), (2), (8) wherein the two types of water-dispersed varnishes described in m are an epoxy ester resin-based water-dispersed varnish and an acrylic resin-based water-dispersed varnish.
) or (4).