JP3485950B2 - Multilayer insulated wire and method of manufacturing the same - Google Patents
Multilayer insulated wire and method of manufacturing the sameInfo
- Publication number
- JP3485950B2 JP3485950B2 JP27048493A JP27048493A JP3485950B2 JP 3485950 B2 JP3485950 B2 JP 3485950B2 JP 27048493 A JP27048493 A JP 27048493A JP 27048493 A JP27048493 A JP 27048493A JP 3485950 B2 JP3485950 B2 JP 3485950B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- insulating layer
- insulating
- insulated wire
- resin
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Coils Of Transformers For General Uses (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は絶縁層が3層以上になっ
ている多層絶縁電線とその製造方法に関し、更に詳しく
は、絶縁層相互間の剥離性が適正であり、半田浴に浸漬
するとその絶縁層が短時間で除去されて導体に半田を付
着させることができるので半田付け特性に優れ、また、
絶縁層の絶縁特性は経時劣化を起こしにくく、更には、
コイル加工性が優れていて、電気・電子機器などに組込
む変圧器の巻線やリード線として用いて有用な多層絶縁
電線とその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer insulated wire having three or more insulating layers and a method for producing the same. More specifically, the insulating layers are appropriately peeled from each other, and when immersed in a solder bath. Since the insulating layer can be removed in a short time and solder can be attached to the conductor, it has excellent soldering characteristics.
The insulation characteristics of the insulation layer do not easily deteriorate over time, and
The present invention relates to a multilayer insulated electric wire which has excellent coil processability and is useful as a winding wire or a lead wire of a transformer incorporated in an electric / electronic device, etc.
【0002】[0002]
【従来の技術】変圧器の構造は、IEC規格(Internat
ional Electrotechnical Communication Standard) Pu
b. 950,65,335,601などによって規定されている。すな
わち、これらの規格では、巻線において導体を被覆する
エナメル皮膜は絶縁層と認定しない、一次巻線と二次巻
線の間には少なくとも3層の絶縁層が形成されているか
または絶縁層の厚みは0.4mm以上であること、一次巻線
と二次巻線の沿面距離は、印加電圧によっても異なる
が、5mm以上であること、また一次側と二次側に300
0Vを印加したときに1分以上耐えること、などが規定
されている。2. Description of the Related Art The structure of a transformer is based on the IEC standard (Internat
ional Electrotechnical Communication Standard) Pu
b. 950,65,335,601 etc. That is, in these standards, the enamel coating that covers the conductor in the winding is not recognized as an insulating layer, and at least three insulating layers are formed between the primary winding and the secondary winding, or it thickness is 0.4mm or more, along plane distance of the primary and secondary windings also differ by an applied voltage, it is 5mm or more, the primary side and the secondary side 300
It is specified that the device withstands 1 minute or more when 0V is applied.
【0003】そのため、現在、主流の座を占めている変
圧器では、図1で例示するような断面構造が採用されて
いる。すなわち、フェライトコア1に鍔付きのボビン2
が嵌め込まれ、ボビン2の周面両側端に沿面距離を確保
するための絶縁バリヤ3が配置された状態でエナメル被
覆された一次巻線4が巻回されたのち、この一次巻線4
の上に、絶縁テープ5を少なくとも3層巻回し、更にこ
の絶縁テープ層の上に沿面距離を確保するための絶縁バ
リヤ3を配置したのち、同じくエナメル被覆された二次
巻線6が巻回された構造である。For this reason, in the transformers that currently occupy the mainstream seat, the cross-sectional structure illustrated in FIG. 1 is adopted. That is, the bobbin 2 with the collar on the ferrite core 1
Is fitted, after the primary winding 4 which is enamelled is wound in a state in which an insulating barrier 3 is arranged to ensure along surface distance on the peripheral surface side end of the bobbin 2, the primary winding 4
Over, turning at least three layers wound insulating tape 5, further After disposing an insulating barrier 3 for securing along surface distance on the insulating tape layer, likewise enamelled secondary winding 6 is wound It is a rotated structure.
【0004】ところで、近年、図1に示した断面構造の
変圧器に代わり、図2で示したように、絶縁バリヤ3や
絶縁テープ層5を含まない構造の変圧器が登場しはじめ
ている。この変圧器は、図1の構造の変圧器に比べて、
全体を小型化することができ、また、絶縁テープの巻回
作業を省略できるなどの利点を備えている。By the way, in recent years, as shown in FIG. 2, a transformer having no insulating barrier 3 or insulating tape layer 5 has begun to appear in place of the transformer having the sectional structure shown in FIG. Compared with the transformer of the structure of FIG. 1, this transformer is
It has the advantages that the entire device can be downsized and that the work of winding the insulating tape can be omitted.
【0005】図2で示した変圧器を製造する場合、用い
る一次巻線4および二次巻線6では、いずれか一方もし
くは両方の導体4a(6a)の外周に少なくとも3層の
絶縁層4b(6b),4c(6c),4d(6d)が形
成されていること、しかもこれらの各絶縁層の間では互
いの層間剥離が可能であることが前記したIEC規格と
の関係で必要になる。In the case of manufacturing the transformer shown in FIG. 2, in the primary winding 4 and the secondary winding 6 used, at least three insulating layers 4b (on the outer circumference of one or both conductors 4a (6a)). 6b), 4c (6c), and 4d (6d) are formed, and it is necessary that the insulating layers can be separated from each other in relation to the IEC standard.
【0006】このような巻線としては、まず導体の外周
に絶縁テープを巻回して1層目の絶縁層を形成し、更に
その上に、絶縁テープを巻回して2層目の絶縁層、3層
目の絶縁層を順次形成して互いに層間剥離する3層構造
の絶縁層を形成したものが知られている(実開平3−1
06626号公報参照)。また、ポリウレタンによるエ
ナメル被覆がなされた導体の外周にフッ素系樹脂を順次
押出被覆して、全体として3層構造の押出被覆層を絶縁
層とする巻線が知られている(実開平3−56112号
公報)。In such a winding, first, an insulating tape is wound around the outer periphery of a conductor to form a first insulating layer, and then an insulating tape is wound on the second insulating layer, It is known that a third insulating layer is sequentially formed to form an insulating layer having a three-layer structure in which layers are separated from each other (Actual Kaihei 3-1.
No. 06626). Further, there is known a winding in which a fluorine-based resin is sequentially extrusion-coated on the outer circumference of a conductor which is enamel-coated with polyurethane, and an extrusion-coated layer having a three-layer structure is used as an insulating layer as a whole (Actual Publication No. 3-56112). Issue).
【0007】[0007]
【発明が解決しようとする課題】しかしながら、前者の
巻線の場合は、絶縁テープの巻回作業が不可避であるた
め生産は著しく低くなり、そのため製造コストは上昇す
るという問題がある。また、後者の巻線の場合、絶縁層
はフッ素系樹脂で形成されているので耐熱性が良好であ
るという利点を備えているが、一方では、層間の密着性
が悪いため絶縁電線としての信頼性に欠けるという問題
がある。However, in the case of the former winding, since the winding work of the insulating tape is unavoidable, the production becomes remarkably low, which causes a problem that the manufacturing cost rises. In addition, the latter winding has the advantage that it has good heat resistance because the insulating layer is made of fluorine-based resin, but on the other hand, the adhesion between layers is poor, so it has a high reliability as an insulated wire. There is a problem of lack of sex.
【0008】すなわち、絶縁電線をコイル加工するとき
には、その絶縁電線をガイドノズルで導きつつコイルボ
ビンに巻き付けていくが、このとき、絶縁電線がガイド
ノズルと擦れて絶縁層が導体から剥離したり、また各絶
縁層の層間が剥離するという事態が発生しやすくなる。
そして、このような状態で電線がコイルボビンに巻回さ
れると、巻回された絶縁電線相互の擦れなどにより、絶
縁層が破れてしまう。このような状態になると、コイル
の電気特性、例えば絶縁破壊特性が損なわれることにな
る。That is, when the insulated wire is coiled, the insulated wire is wound around the coil bobbin while being guided by the guide nozzle. At this time, the insulated wire rubs against the guide nozzle and the insulating layer is peeled off from the conductor. A situation in which the layers of the respective insulating layers are separated easily occurs.
When the electric wire is wound around the coil bobbin in such a state, the insulating layer is broken due to rubbing between the wound insulated electric wires. In such a state, the electrical characteristics of the coil, for example, dielectric breakdown characteristics will be impaired.
【0009】更には、この絶縁層の場合は半田浴に浸漬
しても除去することができないため、例えば絶縁電線を
リードピンに接続するときに行う端末加工に際しては、
端末の絶縁層を信頼性の低い機械的な手段で剥離しなけ
ればならないという問題がある。このような問題を解決
するために、電気絶縁性や耐熱性に優れ、しかも半田の
溶融温度で容易に分解するポリエチレンテレフタレート
(PET)系樹脂を、導体の外周に押出被覆して絶縁層
にすることが検討されている。Further, in the case of this insulating layer, it cannot be removed even by immersing it in a solder bath.
There is a problem that the insulating layer of the terminal has to be peeled off by a mechanical means with low reliability. In order to solve such a problem, polyethylene terephthalate (PET) resin, which has excellent electric insulation and heat resistance and is easily decomposed at the melting temperature of the solder, is extrusion-coated on the outer periphery of the conductor to form an insulating layer. Is being considered.
【0010】しかし、このPET系樹脂は、適切な配向
条件の下で結晶化されてはじめて、本来の耐熱性,機械
特性を発揮するものであり、押出により被覆する場合に
は高い結晶度の皮膜を得ることができず、経時的な耐電
圧特性に今なお改善の余地がある。また、3層の絶縁層
の全てを上記PET系樹脂で形成した電線の場合、その
電線をコイル加工して得られたコイルの絶縁特性に改善
の余地が残されている。However, this PET resin exhibits its original heat resistance and mechanical properties only after being crystallized under appropriate orientation conditions, and when it is coated by extrusion, it has a high crystallinity. Cannot be obtained, and there is still room for improvement in the withstand voltage characteristics over time. Further, in the case of an electric wire in which all of the three insulating layers are formed of the PET resin, there is room for improvement in the insulation characteristics of the coil obtained by coiling the electric wire.
【0011】この問題は、絶縁層として形成されたPE
T系樹脂層における表面の摩擦係数が高いために、コイ
ル加工時に電線に印加される巻張力などの作用で最外層
が摩擦しあってそこにクラックなどの損傷が生じやす
く、しかも、各層はいずれもPET系樹脂から成るため
比較的密着性が良好であり、したがって、最外層に発生
したクラックなどがノッチ効果によって下層の絶縁層に
まで波及しやすいということに起因するものと考えられ
る。This problem is due to the PE formed as an insulating layer.
Due to the high friction coefficient of the surface of the T-based resin layer, the outermost layer is rubbed against each other due to the action of the winding tension applied to the electric wire during coil processing, and damage such as cracks easily occurs there. Since it is also made of PET resin, it has relatively good adhesion, and it is considered that cracks and the like generated in the outermost layer are likely to spread to the lower insulating layer due to the notch effect.
【0012】本発明は、絶縁層をPET系樹脂で形成し
た3層絶縁電線における上記した問題を解決し、絶縁層
相互間の剥離性が適正であり、前記したIEC規格を満
足することは勿論のこと、絶縁層の電気絶縁性の経時劣
化が従来の電線に比べて小さく、また、コイル加工性が
一層優れているので、コイル加工時に絶縁特性等が損な
われることがなく、信頼性が一層優れている多層絶縁電
線とその製造方法の提供を目的とする。The present invention solves the above-mentioned problems in the three-layer insulated wire in which the insulating layer is made of PET resin, and the peelability between the insulating layers is appropriate, and the above IEC standard is satisfied. In addition, the deterioration of the electrical insulation of the insulating layer over time is smaller than that of conventional wires, and because the coil workability is even better, the insulation characteristics, etc. are not impaired during coil processing and reliability is improved. and an object thereof is to provide a multi-layer insulated wire and a manufacturing method thereof are excellent.
【0013】[0013]
【課題を解決するための手段・作用】上記した目的を達
成するために、本発明においては、導体と前記導体を被
覆する3層以上の絶縁層とから成る多層絶縁電線におい
て、導体側から1層目および2層目の絶縁層が、
(a)熱可塑性直鎖ポリエステル樹脂100重量部に対
し、側鎖にカルボン酸またはカルボン酸の金属塩を有す
るエチレン系共重合体5〜40重量部を配合して成る樹
脂混和物の押出被覆層(以下、押出被覆層aという)、
(b)全部または一部がシクロヘキサンジメタノールで
あるアルコール成分と酸成分とを結合して形成される熱
可塑性直鎖ポリエステル樹脂を主成分とする押出被覆層
(以下、押出被覆層bという)、
(c)全部または一部がシクロヘキサンジメタノールで
あるアルコール成分と酸成分とを結合して形成される熱
可塑性直鎖ポリエステル樹脂100重量部に対し、側鎖
にカルボン酸またはカルボン酸の金属塩を有するエチレ
ン系共重合体50重量部以下を配合して成る樹脂混和物
の押出被覆層(以下、押出被覆層cという)のいずれか
であり、前記各絶縁層の形成時には、下層の押出被覆が
終了した時点で、その押出被覆層の表面を100℃以下
に冷却したのち、上層の押出被覆層が形成されているこ
とを特徴とする多層絶縁電線が提供される。In order to achieve the above-mentioned object, in the present invention, in a multi-layer insulated wire comprising a conductor and three or more insulating layers covering the conductor, 1 The second and second insulating layers contain (a) 5 to 40 parts by weight of an ethylene-based copolymer having a carboxylic acid or a metal salt of a carboxylic acid in a side chain with respect to 100 parts by weight of a thermoplastic linear polyester resin. Extrusion coating layer (hereinafter referred to as extrusion coating layer a) of a blended resin mixture, (b) Thermoplastic straight line formed by combining an alcohol component and a acid component, all or part of which is cyclohexanedimethanol Extruded coating layer containing a chain polyester resin as a main component (hereinafter referred to as extruded coating layer b), (c) Formed by combining an alcohol component and a acid component which are wholly or partially cyclohexanedimethanol An extruded coating layer of a resin mixture (hereinafter referred to as "50 parts by weight or less" of an ethylene-based copolymer having a carboxylic acid or a metal salt of a carboxylic acid in a side chain is blended with 100 parts by weight of the thermoplastic linear polyester resin , Extruded coating layer c), and when the insulating layers are formed, the lower extruded coating layer is formed.
At the time of completion, the surface of the extrusion coating layer is 100 ° C or lower.
After cooling, the multilayer insulated wire, wherein Rukoto upper layer of extruded covering layer has been formed is provided.
【0014】また、本発明においては、導体の表面に3
層以上の絶縁層を押出被覆で形成する多層絶縁電線の製
造方法において、所定層の押出被覆が終了した時点で、
その押出被覆層の表面を100℃以下に冷却する操作を
行うことを特徴とする多層絶縁電線の製造方法が提供さ
れる。更に、本発明においては上述の多層絶縁電線を用
い、ボビンに第一の巻線を巻回し、この第一の巻線の外
側に少なくとも第二の巻線を巻回した変圧器が提供され
る。本発明の多層絶縁電線においては、導体側から1層
目、2層目の絶縁層が共に押出被覆層a,押出被覆層b
または押出被覆層cから選ばれた1種によって形成され
ていてもよいが、別種によって形成されていてもよい。Further, in the present invention, 3 is formed on the surface of the conductor.
In the method for producing a multilayer insulated wire in which an insulating layer of at least one layer is formed by extrusion coating, at the time when the extrusion coating of a predetermined layer is completed,
There is provided a method for producing a multilayer insulated wire, which comprises performing an operation of cooling the surface of the extrusion coating layer to 100 ° C. or lower. Furthermore, in the present invention, the above-mentioned multilayer insulated wire is used.
Wind the first winding around the bobbin and
A transformer with at least a second winding wound on the side is provided
It In the multilayer insulated wire of the present invention, the first and second insulating layers from the conductor side are both extruded coating layer a and extruded coating layer b.
Alternatively, it may be formed of one kind selected from the extrusion coating layer c, but may be formed of another kind.
【0015】その場合、1層目と2層目の絶縁層がいず
れも押出被覆層aであるものは、とくに半田付け特性が
優れた絶縁電線になる(以下、これを第1の電線とい
う)。また、1層目と2層目の絶縁層が押出被覆層bま
たは押出被覆層cであるものは、とくに耐熱性が優れた
絶縁電線になる(以下、これを第2の電線という)。こ
れら第1の電線,第2の電線において、1層目と2層目
の絶縁層を構成する樹脂または樹脂混和物は、成分組成
が異なっていてもよい。In this case, the extruded coating layer a as the first and second insulating layers is an insulated electric wire having particularly excellent soldering characteristics (hereinafter referred to as the first electric wire). . In addition, when the first and second insulating layers are the extruded coating layer b or the extruded coating layer c, it becomes an insulated electric wire having excellent heat resistance (hereinafter, referred to as a second electric wire). In the first electric wire and the second electric wire, the resin or resin mixture forming the first insulating layer and the second insulating layer may have different component compositions.
【0016】また、1層目と2層目の絶縁層において、
一方の層を押出被覆層aとし、他方の層を押出被覆層b
または押出被覆層cにすると、得られる多層絶縁電線
は、半田付け特性や耐熱性でバランスのとれたものにな
る。押出被覆層aを構成する樹脂混和物は、後述する熱
可塑性の直鎖ポリエステル樹脂とエチレン系共重合体と
を必須成分とする。Further, in the first and second insulating layers,
One layer is an extrusion coating layer a and the other layer is an extrusion coating layer b.
Alternatively, when the extruded coating layer c is used, the resulting multilayer insulated wire has a well-balanced soldering property and heat resistance. The resin mixture constituting the extrusion coating layer a contains a thermoplastic linear polyester resin and an ethylene copolymer, which will be described later, as essential components.
【0017】このうち、熱可塑性直鎖ポリエステル樹脂
としては、酸成分である芳香族ジカルボン酸またはその
一部が脂肪族ジカルボン酸で置換されているジカルボン
酸と脂肪族アルコール成分である脂肪族ジオールとのエ
ステル反応で得られたものが用いられる。例えば、ポリ
エチレンテレフタレート樹脂(PET),ポリブチレン
テレフタレート樹脂(PBT),ポリエチレンナフレー
ト樹脂などを代表例としてあげることができる。Among them, as the thermoplastic linear polyester resin , an aromatic dicarboxylic acid which is an acid component or a dicarboxylic acid in which a part thereof is substituted with an aliphatic dicarboxylic acid and an aliphatic diol which is an aliphatic alcohol component are used. What was obtained by the ester reaction of is used. Representative examples include polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), and polyethylene naphthalate resin.
【0018】この熱可塑性直鎖ポリエステル樹脂の合成
時に用いる芳香族ジカルボン酸としては、例えば、テレ
フタル酸,イソフタル酸,テレフタルジカルボン酸,ジ
フェニルスルホンジカルボン酸,ジフェノキシエタンジ
カルボン酸,ジフェニルエーテルカルボン酸,メチルテ
レフタル酸,メチルイソフタル酸などをあげることがで
きる。これらのうち、とくにテレフタル酸は好適なもの
である。Examples of the aromatic dicarboxylic acid used in the synthesis of the thermoplastic linear polyester resin include terephthalic acid, isophthalic acid, terephthaldicarboxylic acid, diphenylsulfonedicarboxylic acid, diphenoxyethanedicarboxylic acid, diphenylethercarboxylic acid, methylterephthalate. Acid, methyl isophthalic acid, etc. can be mentioned. Of these, terephthalic acid is particularly preferable.
【0019】芳香族ジカルボン酸の一部を置換する脂肪
族ジカルボン酸としては、例えば、コハク酸,アジピン
酸,セバシン酸などをあげることができる。これらの脂
肪族ジカルボン酸の置換量は、芳香族ジカルボン酸の3
0モル%未満であることが好ましく、とくに20モル%
未満であることが好ましい。一方、エステル反応に用い
る脂肪族ジオールとしては、例えば、エチレングリコー
ル,トリメチレングリコール,テトラメチレングリコー
ル,ヘキサンジオール,デカンジオールなどをあげるこ
とができる。これらのうち、エチレングリコール,テト
ラメチルグリコールは好適である。また、脂肪族ジオー
ルとしては、その一部がポリエチレングリコールやポリ
テトラメチレングリコールのようなオキシグリコールに
なっていてもよい。Examples of the aliphatic dicarboxylic acid that partially replaces the aromatic dicarboxylic acid include succinic acid, adipic acid, sebacic acid and the like. The amount of substitution of these aliphatic dicarboxylic acids is the same as that of aromatic dicarboxylic acids.
It is preferably less than 0 mol%, particularly 20 mol%.
It is preferably less than. On the other hand, examples of the aliphatic diol used in the ester reaction include ethylene glycol, trimethylene glycol, tetramethylene glycol, hexanediol and decanediol. Of these, ethylene glycol and tetramethyl glycol are preferable. Moreover, as the aliphatic diol, a part thereof may be oxyglycol such as polyethylene glycol or polytetramethylene glycol.
【0020】押出被覆層aを構成する樹脂混和物の他の
必須成分は、例えば、ポリエチレンの側鎖にカルボン酸
もしくはカルボン酸の金属塩を結合させたエチレン系共
重合体である。このエチレン系共重合体は、前記した熱
可塑性直鎖ポリエステル樹脂の結晶化を抑制する働きを
し、そのことにより、形成した絶縁層の電気的特性の経
時劣化を抑制すると同時に、1層目と2層目の各絶縁層
間の層間において良好な剥離性の確保に寄与する。The other essential component of the resin mixture constituting the extrusion coating layer a is, for example, an ethylene copolymer in which a side chain of polyethylene is bound with a carboxylic acid or a metal salt of a carboxylic acid. This ethylene-based copolymer functions to suppress crystallization of the thermoplastic linear polyester resin described above, thereby suppressing deterioration of the electrical characteristics of the formed insulating layer over time, and This contributes to ensuring good peelability between the second insulating layers.
【0021】ポリエチレンの側鎖に結合させるカルボン
酸としては、例えば、アクリル酸,メタクリル酸,クロ
トン酸のような不飽和モノカルボン酸や、マレイン酸,
フマル酸,フタル酸のような不飽和ジカルボン酸をあげ
ることができ、またこれらの金属塩としては、Zn,N
a,K,Mgなどの塩をあげることができる。このよう
なエチレン系共重合体としては、例えば、エチレン−メ
タアクリル酸共重合体のカルボン酸の一部を金属塩に
し、一般にアイオノマーと呼ばれる樹脂(例えば、ハイ
ミラン;商品名、三井ポリケミカル(株)製),エチレ
ン−アクリル酸共重合体(例えば、EAA;商品名、ダ
ウケミカル社製),側鎖にカルボン酸を有するエチレン
系グラフト重合体(例えば、アドマー;商品名、三井石
油化学工業(株)製)をあげることができる。Examples of the carboxylic acid bonded to the side chain of polyethylene include unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid and crotonic acid, maleic acid,
Unsaturated dicarboxylic acids such as fumaric acid and phthalic acid can be mentioned, and examples of these metal salts include Zn, N
Salts such as a, K, and Mg can be used. As such an ethylene-based copolymer, for example, a part of the carboxylic acid of the ethylene-methacrylic acid copolymer is made into a metal salt, and a resin generally called an ionomer (for example, Himilan; trade name, Mitsui Polychemical Co., Ltd. )), An ethylene-acrylic acid copolymer (for example, EAA; trade name, manufactured by Dow Chemical Co., Ltd.), an ethylene-based graft polymer having a carboxylic acid in a side chain (for example, Admer; trade name, Mitsui Petrochemical Industry ( Co., Ltd.).
【0022】この樹脂混和物において、熱可塑性直鎖ポ
リエステル樹脂とエチレン系共重合体との配合割合は、
前者100重量部に対し、後者は5〜40重量部の範囲
に設定される。後者の配合量が5重量部より少ない場合
は、形成された絶縁層の耐熱性に問題はないが、熱可塑
性直鎖ポリエステル樹脂の結晶化抑制効果は小さくな
り、そのため、コイル加工時に絶縁層の表面に微小クラ
ックが発生する、いわゆるクレージング現象が多発す
る。また、絶縁層の経時劣化が進んで絶縁破壊電圧の著
しい低下を引き起こすようになる。他方、配合量が40
重量部より多くなると、絶縁層の耐熱性は著しく劣化し
てしまう。両者の好ましい配合割合は、前者100重量
部に対し、後者は7〜25重量部である。In this resin mixture, the blending ratio of the thermoplastic linear polyester resin and the ethylene copolymer is
The latter is set in a range of 5 to 40 parts by weight with respect to the former 100 parts by weight. When the compounding amount of the latter is less than 5 parts by weight, there is no problem in heat resistance of the formed insulating layer, but the effect of suppressing crystallization of the thermoplastic linear polyester resin becomes small, and therefore the insulating layer of the insulating layer is not formed during coil processing. The so-called crazing phenomenon in which minute cracks occur on the surface frequently occurs. Further, the deterioration of the insulating layer with time progresses, causing a significant decrease in the dielectric breakdown voltage. On the other hand, the compounding amount is 40
When the amount is more than the weight part, the heat resistance of the insulating layer is significantly deteriorated. The preferable mixing ratio of both is 100 parts by weight of the former and 7 to 25 parts by weight of the latter.
【0023】つぎに、押出被覆層bを構成する材料は、
全部または一部が脂環族アルコール成分と酸成分とを結
合して形成される熱可塑性の直鎖ポリエステル樹脂であ
る。なかでも好適なものは、全部または一部がシクロヘ
キサンジメタノールと酸成分とを縮合して形成される熱
可塑性直鎖ポリエステル樹脂であり、具体的には、ポリ
シクロヘキサンジメチレンテレフタレート樹脂(PC
T)をあげることができる。この樹脂は前記したPET
などに比べてより優れた耐熱性を備えている。Next, the material constituting the extrusion coating layer b is
All or part of the alicyclic alcohol component and the acid component are combined.
It is a thermoplastic linear polyester resin formed by the combination. Among them preferred are heat formed by condensing all or a portion starve Kurohe <br/> Kisanjimetano Le an acid component
A thermoplastic linear polyester resin, specifically, poly cyclohexane dimethylene terephthalate resin (PC
T) can be raised. This resin is PET
It has better heat resistance than
【0024】また、絶縁層の経時劣化に基づく絶縁破壊
電圧の低下を抑制することを考えると、変性樹脂とし
て、例えば、ポリアミド樹脂,ポリカーボネート樹脂,
ポリウレタン樹脂などを、上記熱可塑性直鎖ポリエステ
ル樹脂100重量部に対して10〜100重量部配合す
ることが好ましい。このようなPCT系樹脂としては、
例えば、EKTAR−DN,EKTAR−DA,EKT
AR−GN(商品名、東レ(株)製)を好適なものとし
て使用することができる。Considering suppression of a decrease in dielectric breakdown voltage due to deterioration of the insulating layer with time, examples of the modified resin include polyamide resin, polycarbonate resin,
The polyurethane resin, it is preferable to blend 10 to 100 parts by weight per 100 parts by weight of the thermoplastic linear polyester resin. As such a PCT resin,
For example, EKTAR-DN, EKTAR-DA, EKT
AR-GN (trade name, manufactured by Toray Industries, Inc.) can be preferably used.
【0025】押出被覆層cを構成する樹脂混和物は、例
えば前記したPCT系樹脂と、押出被覆層aの形成に用
いた樹脂混和物における必須材料であるエチレン系共重
合体との樹脂混和物である。この樹脂混和物において、
PCT系樹脂とエチレン系共重合体との配合割合は、前
者100重量部に対し、後者は50重量部以下に設定さ
れる。The resin mixture constituting the extrusion coating layer c is, for example,
For example, it is a resin mixture of the above-mentioned PCT resin and an ethylene copolymer which is an essential material in the resin mixture used for forming the extrusion coating layer a. In this resin mixture,
The mixing ratio of the PCT resin and the ethylene copolymer is set to 50 parts by weight or less with respect to 100 parts by weight of the former.
【0026】後者の配合量を50重量部より多くする
と、PCT系樹脂の優れた耐熱性が低下してしまい、形
成された絶縁層の耐熱性に問題が生ずるからである。両
者の好ましい配合割合は、前者100重量部に対し、後
者5〜30重量部である。本発明の多層絶縁電線におけ
る3層目の絶縁層は、熱可塑性ポリアミド樹脂またはこ
れを主成分とする樹脂混和物で形成される。この3層目
の絶縁層は表面における摩擦係数が比較的小さく、また
機械的強度も優れているので、電線のコイル加工時にお
ける最外層へのクラックなどの損傷を最小限に抑制する
ことができる。また2層目の絶縁層(ポリエステル系樹
脂層)との密着性も低いので、最外層に損傷が生じた場
合でもその損傷が2層目の絶縁層に波及する事態は抑制
される。その結果、コイル加工後の絶縁特性の低下を防
止することができる。If the amount of the latter compounded is more than 50 parts by weight, the excellent heat resistance of the PCT resin will be deteriorated and the heat resistance of the formed insulating layer will be problematic. The preferable blending ratio of both is 5 to 30 parts by weight of the latter with respect to 100 parts by weight of the former. The third insulating layer in the multilayer insulated wire of the present invention is formed of a thermoplastic polyamide resin or a resin mixture containing the thermoplastic polyamide resin as a main component. The third insulating layer has a relatively small friction coefficient on the surface and is excellent in mechanical strength, so that damage such as cracks in the outermost layer during coil processing of the electric wire can be minimized. . In addition, since the adhesiveness to the second insulating layer (polyester resin layer) is low, even if the outermost layer is damaged, the damage is prevented from spreading to the second insulating layer. As a result, it is possible to prevent deterioration of the insulation characteristics after the coil processing.
【0027】更に、この3層目の絶縁層は、押出被覆層
aまたは押出被覆層cの形成時に配合するポリエチレン
系共重合体の量が少ない場合や、押出被覆層bまたは押
出被覆層cに使用する樹脂、例えばPCT系樹脂を製造
するときに用いる脂環族アルコール成分、例えばシクロ
ヘキサンジメタノールの量が少ない場合に生起しやすい
絶縁破壊電圧の経時劣化を緩和する働きもする。Further, the third insulating layer is used in the case where the amount of the polyethylene-based copolymer compounded at the time of forming the extrusion coating layer a or the extrusion coating layer c is small, or in the extrusion coating layer b or the extrusion coating layer c. It also acts to mitigate the deterioration with time of the dielectric breakdown voltage that tends to occur when the amount of the resin used , for example, the alicyclic alcohol component used when manufacturing the PCT-based resin , such as cyclohexanedimethanol is small. .
【0028】熱可塑性ポリアミド樹脂としては、例え
ば、4−ナイロン,6−ナイロン,10−ナイロン,1
1−ナイロン,12−ナイロン,4,6−ナイロン,
6,6−ナイロン,6,10−ナイロン,6,12−ナ
イロン、またはそれらの共重合ナイロン(いずれも、デ
ュポン社製の商品名)をあげることができる。とくに、
4,6−ナイロンは耐熱性に優れているという点で好適
である。As the thermoplastic polyamide resin, for example, 4-nylon, 6-nylon, 10-nylon, 1
1-nylon, 12-nylon, 4,6-nylon,
Examples thereof include 6,6-nylon, 6,10-nylon, 6,12-nylon, and copolymerized nylon thereof (all are trade names manufactured by DuPont). Especially,
4,6-Nylon is preferable because it has excellent heat resistance.
【0029】また、これらポリアミド樹脂に、例えば、
エチレン−メタクリル酸共重合体,エチレン−アクリル
酸共重合体,ポリエチレン,前記した熱可塑性直鎖ポリ
エステル樹脂,ポリウレタン系樹脂,ポリカーボネート
樹脂などの1種または2種以上を混和してもよい。この
場合、混和の割合は、ポリアミド樹脂100重量部に対
し3〜50重量部であることが好ましい。In addition, for example, in these polyamide resins,
One or more of ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, polyethylene, the above-mentioned thermoplastic linear polyester resin, polyurethane resin and polycarbonate resin may be mixed. In this case, the mixing ratio is preferably 3 to 50 parts by weight with respect to 100 parts by weight of the polyamide resin.
【0030】本発明の電線においては、1層目と2層目
の絶縁層を、いずれも、脂環族アルコール成分、とくに
シクロヘキサンジメタノールで60モル%以上置換され
ているPCT系樹脂100重量部に対し、側鎖にカルボ
ン酸のZn塩を有するポリエチレン系共重合体20重量
部以下を混和した樹脂混和物で形成し、3層目の絶縁層
を4,6−ナイロンで形成したものは、電線の耐熱クラ
スを、E種(120℃)レベルからB種(130℃)レ
ベルにまで向上させることができて有用である。In the electric wire of the present invention, the first and second insulating layers are both PCT-based in which the alicyclic alcohol component, especially cyclohexanedimethanol is substituted by 60 mol% or more. It is made of a resin mixture in which 20 parts by weight or less of a polyethylene copolymer having a Zn salt of a carboxylic acid in a side chain is mixed with 100 parts by weight of a resin, and a third insulating layer is made of 4,6-nylon. These are useful because they can improve the heat resistance class of electric wires from the class E (120 ° C) level to the class B (130 ° C) level.
【0031】本発明の多層絶縁電線は、1層目用の樹脂
または樹脂混和物を導体の外周に押出被覆して所望厚み
の1層目の絶縁層を形成し、ついで、この1層目の絶縁
層の外周に2層目用の樹脂または樹脂混和物を押出被覆
して所望厚みの2層目の絶縁層を形成し、更に、この2
層目の絶縁層の外周に3層目用のポリアミド樹脂を押出
被覆して所望厚みの3層目の絶縁層を形成することによ
り製造される。In the multilayer insulated wire of the present invention, the outer periphery of the conductor is extrusion-coated with the resin or resin mixture for the first layer to form the first insulating layer having a desired thickness, and then the first layer. A resin or resin mixture for the second layer is extrusion-coated on the outer periphery of the insulating layer to form a second insulating layer having a desired thickness.
It is manufactured by extrusion-coating the outer periphery of the third insulating layer with a polyamide resin for the third layer to form the third insulating layer having a desired thickness.
【0032】このとき、1層目および2層目の各押出被
覆時に用いる樹脂混和物は、各層について同じ組成のも
のであってもよいし、上記した許容される配合割合の範
囲内で成分の組成を変化させたものであってもよい。ま
た、形成された3層の絶縁層の全体の厚みは100μm
以下に管理することが好ましく、また、2層目の絶縁層
の厚みを他の絶縁層の厚い方の厚みの2倍以上の厚みに
すると、IEC規格950で規定する電気的特性を容易
に実現することができる。At this time, the resin mixture used for the extrusion coating of the first layer and the second layer may have the same composition for each layer, or the components may be mixed within the above-mentioned permissible compounding ratio. The composition may be changed. The total thickness of the three insulating layers formed is 100 μm.
It is preferable to control the thickness below, and if the thickness of the second insulating layer is twice or more the thickness of the thicker one of the other insulating layers, the electrical characteristics specified by IEC standard 950 can be easily realized. can do.
【0033】更には、絶縁層をなす各押出被覆層の形成
時には、下層の押出被覆が終了した時点で、その押出被
覆層の表面を、例えば水冷または空冷のような方法で1
00℃以下に冷却したのち、上層の押出被覆層を形成す
ると、上,下の押出被覆層間における剥離性が向上して
有効である。この冷却操作は、とくに1層目の押出被覆
を終了した時点で行うことが好適である。Furthermore, when forming each extrusion coating layer forming the insulating layer, the surface of the extrusion coating layer is formed by a method such as water cooling or air cooling when the extrusion coating of the lower layer is completed.
It is effective to form the upper extrusion coating layer after cooling to 00 ° C. or lower, since the peelability between the upper and lower extrusion coating layers is improved. This cooling operation is particularly preferably performed at the time when the extrusion coating of the first layer is completed.
【0034】本発明の多層絶縁電線においては、3層以
上の絶縁層はいずれも樹脂混和物の押出被覆法で形成さ
れるので、製造時の生産性は非常に高くなる。また、層
間剥離性は良好であるとともに、端末加工時には、直接
半田付けを行うことができる。そして、1層目,2層目
の絶縁層では、ベース樹脂であるPCT系樹脂等のポリ
エステル樹脂の結晶化は抑制され、そのため、絶縁層の
電気特性などの劣化は非常に起こりづらくなる。In the multi-layer insulated wire of the present invention, since all three or more insulating layers are formed by the extrusion coating method of the resin mixture, the productivity at the time of production becomes very high. Further, the delamination property is good, and at the time of processing the terminal, direct soldering can be performed. The first layer, the second insulating layer, poly <br/> ester trees crystallization of fat PCT resins as the base resin is suppressed, therefore, the deterioration of such electric properties of the insulating layer very Hard to happen.
【0035】更に、本発明の多層絶縁電線の最外層はポ
リアミド樹脂またはそれを主成分とする樹脂混和物で形
成されているので、外表面の摩擦係数は小さくなり、そ
のため、コイル加工時における最外層の損傷は抑制され
るようになる。また、1層目と2層目の経時劣化も緩和
される。以上に述べた多層絶縁電線は、変圧器の構造を
規定したIEC規格950で規定する電気的特性を良好
なコイル加工性の下で実現することができる。従って当
該多層絶縁電線を変圧器に使用すると、一次巻線と二次
巻線との間の絶縁テープ、および縁面距離を確保する絶
縁バリヤが不要で、コイル加工性に優れた変圧器を得る
ことができる。 Furthermore, since the outermost layer of the multi-layer insulated wire of the present invention is formed of polyamide resin or a resin mixture containing it as a main component, the coefficient of friction of the outer surface is small, and therefore the outermost layer during coil processing is used. Damage to the outer layer is suppressed. Further, deterioration with time of the first layer and the second layer is also alleviated. The multilayer insulated wire described above has the structure of a transformer.
Good electrical characteristics specified by IEC standard 950
It is possible to realize it with excellent coil workability. Therefore
When the multi-layer insulated wire is used in a transformer,
Insulation tape between windings and insulation to ensure edge distance
Obtaining a transformer with excellent coil workability without the need for edge barriers
be able to.
【0036】[0036]
【発明の実施例】実施例1,比較例1〜11
表1に示した各成分を表示の割合(重量部)で混練し
て、各押出被覆層用の樹脂混和物を調製した。導体とし
て線径0.6mmの軟銅線を用意し、その外周に、上記樹
脂混和物を押出被覆して、表示の厚みで1層目の押出被
覆層を形成したのち、2層目の押出被覆層を形成し、更
に2層目の外周に上記樹脂混和物を押出被覆して3層絶
縁電線を製造した。EXAMPLES Example 1 and Comparative Examples 1 to 11 The components shown in Table 1 were kneaded at the indicated proportions (parts by weight) to prepare resin blends for each extrusion coating layer. An annealed copper wire having a wire diameter of 0.6 mm is prepared as a conductor, and the outer periphery thereof is extrusion-coated with the above resin mixture to form a first-layer extrusion coating layer with the indicated thickness, and then a second-layer extrusion coating. A layer was formed, and the outer periphery of the second layer was extrusion-coated with the above resin mixture to produce a three-layer insulated wire.
【0037】なお、実施例1のものを製造するときに
は、各押出被覆後の表面を100℃以下に水冷した。ま
た、比較例4の電線の各絶縁層は、表示した絶縁フィル
ムを巻回したものである。When manufacturing the product of Example 1, the surface after each extrusion coating was water-cooled to 100 ° C. or lower. Further, each insulating layer of the electric wire of Comparative Example 4 is formed by winding the indicated insulating film.
【0038】[0038]
【表1】 [Table 1]
【0039】以上の12種類の3層絶縁電線につき、下
記の仕様で各種の特性を測定した。
半田付け性:
電線の末端約40mmの部分を温度400℃の溶融半田に
浸漬し、浸漬した30mmの部分に半田が付着するまでの
時間(秒)を測定。この時間が短いほど半田付け性に優
れていることを表す。With respect to the above 12 kinds of three-layer insulated wires, various characteristics were measured with the following specifications. Solderability: The portion of the wire at the end of about 40 mm is immersed in molten solder at a temperature of 400 ° C, and the time (seconds) until the solder adheres to the immersed portion of 30 mm is measured. The shorter this time is, the better the solderability is.
【0040】電気絶縁性:
製造直後の2層被覆,3層被覆のそれぞれの電線につ
き、JISC3003で規定する2個撚り法に準じて片
方に裸銅線を用い、そのときの絶縁破壊電圧を測定。ま
た、3層被覆の電線については、大気中に1年間放置し
たのち上記と同じ方法で絶縁破壊電圧を測定し、電気絶
縁性の経時変化を調べた。The electrically insulating: 2-layer coated immediately after production, per each wire of a three-layer coating, using a bare copper wire to one according to two twisting method of stipulated in JISC3003, the breakdown voltage at that time Measurement. The electric wire coated with three layers was left in the atmosphere for one year, and then the dielectric breakdown voltage was measured by the same method as above to examine the change over time in the electrical insulation property.
【0041】耐熱性:3層被覆電線と裸銅線をJISC
3003に準拠して2個撚りし、その状態で、温度20
0℃で7日間の加熱処理を施したのち絶縁破壊電圧を測
定。この値が大きいほど耐熱性に優れていることを表
す。
耐クレージング性:電線を6ヶ月間大気中に放置したの
ち、その電線を直径12mmのコイル巻き枠に整列機械巻
きし、そのときに電線表面にクレージングが発生したか
否かを観察。Heat resistance: JISC for 3-layer coated wire and bare copper wire
Twist two in accordance with 3003, in that state, the temperature 20
After heat treatment at 0 ° C for 7 days, measure the dielectric breakdown voltage. The larger this value is, the better the heat resistance is. Crazing resistance: After the wire is left in the atmosphere for 6 months, the wire is aligned and mechanically wound on a coil reel having a diameter of 12 mm, and it is observed whether or not crazing occurs on the surface of the wire.
【0042】層間剥離性:絶縁層の長手方向を約50cm
に亘りカッターナイフで切り裂いたのち、電線の周方向
にも、1本、全周に亘って切込みを入れ、電線の一端を
よじり器に固定し、他端をよじり器のチャックに挟んで
電線を真っ直ぐに保持し、この状態でチャックを回転さ
せて電線を長手方向によじり、3層の絶縁層が各層に剥
離する回転数を調べた。なお、剥離は、周方向に切込み
を入れた部分の一部の皮膜が剥離できた時点とする。こ
の回転数が少ないものほど層間剥離性に優れている。Delamination: About 50 cm in the longitudinal direction of the insulating layer
After cutting it with a cutter knife, make a notch along the entire circumference in the circumferential direction of the wire, fix one end of the wire to the twister and sandwich the other end with the chuck of the twister to fix the wire. It was held straight, the chuck was rotated in this state, the electric wire was twisted in the longitudinal direction, and the number of rotations at which the three insulating layers were separated into each layer was examined. The peeling is performed at the time when a part of the coating film in the cut portion in the circumferential direction can be peeled off. The smaller the number of rotations, the better the delamination property.
【0043】コイル加工性:一辺が7mmの正方形断面を
有する導電性角芯に、コイルを加工機を用いて6kgの張
力をかけながら電線を整列巻き(50ターン)し、電線
と角芯の間に電圧3000Vを印加したときに、絶縁破
壊が起こるまでの時間を測定。この試験はコイル各10
個ずつで行い、結果は平均値で評価。この時間が長いほ
ど、コイル加工時に絶縁層に損傷が起こっていないこ
と、すなわちコイル加工性に優れていることを表す。な
お、ガイドノズルとしては、先端の孔径が電線の外径よ
り0.05mm大きいものを用い、また線速は20m/分に
設定した。Coil workability: A wire is aligned and wound (50 turns) on a conductive square core having a square cross section with a side of 7 mm while applying a tension of 6 kg using a processing machine, and between the wire and the square core. Measures the time until dielectric breakdown occurs when a voltage of 3000 V is applied to. This test has 10 coils each
The results are evaluated by the average value. The longer this time is, the less the insulating layer is damaged during coil processing, that is, the better the coil processability is. The guide nozzle used had a tip hole diameter larger than the outer diameter of the electric wire by 0.05 mm, and the linear velocity was set to 20 m / min.
【0044】巻線後の外観観察:コイル加工性の試験の
場合と同様に整列巻きを行なってコイルを加工し、得ら
れた各10個のコイルにつき、電線を角芯から解いてそ
の表面を観察し、絶縁層に破れが発生した個数を調べ
た。以上の結果を一括して表2に示した。Observation of appearance after winding: Similar to the case of the coil workability test, the coils were processed by aligning and winding, and for each of the obtained 10 coils, the electric wire was unwound from the square core and the surface thereof was removed. It was observed and the number of breakages in the insulating layer was examined. The above results are collectively shown in Table 2.
【0045】[0045]
【表2】 [Table 2]
【0046】表2から次のようなことが明らかである。
1)側鎖にカルボン酸などを有するエチレン系共重合体
(以下、変性材という)と熱可塑性ポリエステル樹脂と
からなる樹脂混和物で1層目,2層目が形成され、3層
目が熱可塑性ポリアミド樹脂で形成された実施例1およ
び比較例1〜4の絶縁電線は、とくに半田付け特性に優
れており、他の特性も良好である。The following is clear from Table 2. 1) The first and second layers are formed by a resin mixture composed of an ethylene-based copolymer having a carboxylic acid or the like in the side chain (hereinafter referred to as a modifier) and a thermoplastic polyester resin, and the third layer is formed by heat. Example 1 and a plastic polyamide resin
The insulated wires of Comparative Examples 1 to 4 are particularly excellent in soldering characteristics, and are also excellent in other characteristics.
【0047】また、上記した各実施例の絶縁電線の場合
は、いずれも、上記層間剥離性の試験時に、まず最初
に、3層目と2層目で層間剥離が起こり、ついで、1層
目と2層目の層間剥離が起こるというように、絶縁層の
外側から剥離した。このことは、電線に外力が加わった
とき、絶縁層においては、外側から剥離が生じ内側ほど
剥離が防止されるということを意味している。したがっ
て、これら実施例の各電線は信頼性の高いものになって
いる。Also, in the case of the insulated wires of the above-mentioned respective examples, during the above-mentioned delamination test, delamination first occurred in the third and second layers, and then in the first layer. Then, the second layer was peeled from the insulating layer. This means that when an external force is applied to the wire, the insulating layer is peeled from the outside and is prevented from peeling toward the inside. Therefore, the electric wires of these examples have high reliability.
【0048】2)製造時、押出被覆後に水冷する工程を
設けた、実施例1の絶縁電線は層間剥離性が優れてい
る。
3)上記変性材を配合せず、熱可塑性ポリエステル樹脂
単独で1層目,2層目を形成した比較例5の絶縁電線
は、特性の経時変化が著しい。また、コイル加工性も悪
い。コイル加工性が悪いことは、最外層が熱可塑性直鎖
ポリエステル樹脂で形成されているからであると考えら
れる。2) At the time of production, the insulated electric wire of Example 1 provided with a step of water cooling after extrusion coating is excellent in delamination. 3) The insulated wire of Comparative Example 5 , in which the thermoplastic polyester resin alone was used to form the first layer and the second layer without blending the above-mentioned modifier, shows remarkable changes in characteristics over time. Also, the coil processability is poor. The poor coil processability is considered to be because the outermost layer is formed of the thermoplastic linear polyester resin.
【0049】4)他方、変性材が過剰(50重量部)に
配合された樹脂混和物を用いて形成した比較例6の絶縁
電線は、耐熱性が悪い。
5)比較例7は、1層目,2層目に加え、3層目も変性
材が配合された熱可塑性ポリエステル樹脂で絶縁層が形
成されたものである。この絶縁電線は、3層目が熱可塑
性ポリアミド樹脂で形成されていないため、コイル加工
性が悪い。4) On the other hand, the insulated wire of Comparative Example 6 formed by using the resin mixture in which the modifier is blended in excess (50 parts by weight) has poor heat resistance. 5) In Comparative Example 7 , in addition to the first and second layers, the third layer also has an insulating layer formed of a thermoplastic polyester resin containing a modifier. Since the third layer of this insulated wire is not formed of the thermoplastic polyamide resin, the coil workability is poor.
【0050】6)フィルムを巻いて絶縁層を形成した比
較例8の絶縁電線は、半田付けできない。また、絶縁破
壊電圧が低く絶縁特性が悪い。更に、最外層に凹凸があ
ってコイル加工性の結果も悪い。
7)全く異なる樹脂(テフロン)で絶縁層を形成した比
較例9の絶縁電線も半田付けできない。また層間剥離性
は8回であり、層間の密着性が悪すぎる。6) The insulated electric wire of Comparative Example 8 in which a film is wound to form an insulating layer cannot be soldered. Also, the breakdown voltage is low and the insulation characteristics are poor. Further, the outermost layer has irregularities, and the result of the coil processability is also poor. 7) The insulated wire of Comparative Example 9 in which the insulating layer is formed of a completely different resin (Teflon) cannot be soldered. Further, the interlayer peelability is 8 times, and the adhesion between layers is too bad.
【0051】8)絶縁層の1層目と3層目がポリアミド
樹脂で形成されている比較例10の電線はコイル加工性
が悪い。これは、絶縁層と導体との密着性が良好でない
うえに、1層目と2層目,2層目と3層目がそれぞれ異
種類の樹脂が接触する状態であるため全体としての密着
性が非常に悪くなっているからであると考えられる。ま
た、この比較例10の電線は絶縁破壊電圧が低い。これ
は、ポリアミド樹脂からなる絶縁層が2層存在するから
であると考えられる。8) The wire of Comparative Example 10 in which the first and third insulating layers are made of polyamide resin has poor coil processability. This is because the adhesion between the insulating layer and the conductor is not good, and the different types of resin are in contact with the first and second layers, and the second and third layers, respectively. Is considered to be very bad. The electric wire of Comparative Example 10 has a low dielectric breakdown voltage. It is considered that this is because there are two insulating layers made of polyamide resin.
【0052】9)2層目と3層目がポリアミド樹脂で形
成されている比較例11の電線は、比較例10と同じよ
うに、絶縁破壊特性が悪い。
実施例2,3,比較例12〜14
表3に示した各成分を表示の割合で混練して、各押出被
覆層用の樹脂混和物を調製した。9) The electric wire of Comparative Example 11 in which the second and third layers are made of polyamide resin has a poor dielectric breakdown characteristic as in Comparative Example 10 . Examples 2 and 3 and Comparative Examples 12 to 14 The components shown in Table 3 were kneaded at the indicated ratios to prepare resin blends for each extrusion coating layer.
【0053】導体として線径0.6mmの軟銅線を用意
し、その外周に、上記樹脂混和物を押出被覆して、表示
の厚みで1層目の押出被覆層を形成したのち、2層目の
押出被覆層を形成し、更に2層目の外周に上記樹脂混和
物を押出被覆して3層絶縁電線を製造した。なお、実施
例2,3を製造する際には、各押出被覆工程の後、その
表面を100℃以下に水冷した。An annealed copper wire having a wire diameter of 0.6 mm was prepared as a conductor, and the outer periphery thereof was extrusion-coated with the above resin mixture to form a first extruded coating layer with the indicated thickness, and then a second layer. Was formed on the outer periphery of the second layer, and the resin mixture was extrusion-coated on the outer periphery of the second layer to produce a three-layer insulated wire. In addition, when manufacturing Examples 2 and 3 , after each extrusion coating step, the surface thereof was water-cooled to 100 ° C. or lower.
【0054】[0054]
【表3】 [Table 3]
【0055】これらの3層絶縁電線につき、実施例1と
同様の仕様で各種の特性を測定した。ただし、耐熱性試
験における加熱温度は230℃に設定した。以上の結果
を表4に示した。With respect to these three-layer insulated wires, various characteristics were measured with the same specifications as in Example 1 . However, the heating temperature in the heat resistance test was set to 230 ° C. The above results are shown in Table 4.
【0056】[0056]
【表4】 [Table 4]
【0057】表4から次のようなことが明らかである。
1)PCT系樹脂で1層目と2層目を形成した実施例
2,3と比較例12の絶縁電線は、いずれの特性も優れ
ている。とくに耐熱性試験を230℃という高い温度で
行ったにもかかわらず良好な結果が得られており、これ
ら実施例2,3、比較例12が耐熱性に優れていること
がわかる。また、これら実施例2,3、比較例12の絶
縁電線は、実施例1のものと同じように外側の絶縁層か
ら順次剥離していった。The following is clear from Table 4. 1) Example in which the first and second layers were formed of PCT resin
The insulated wires of Nos. 2 and 3 and Comparative Example 12 have excellent characteristics. Particularly, good results were obtained even though the heat resistance test was carried out at a high temperature of 230 ° C., and it is understood that these Examples 2, 3 and Comparative Example 12 have excellent heat resistance. The insulated wires of Examples 2 and 3 and Comparative Example 12 were sequentially peeled off from the outer insulating layer in the same manner as in Example 1 .
【0058】2)実施例2はPCT系樹脂単独で1層目
と2層目を形成したものであるが、良好な特性を示して
いる。PCT系樹脂を用いた場合は、ほとんど経時変化
の問題を無視できる(前記比較例1参照)。ただし、こ
のような良好な特性を得るためには、3層目を熱可塑性
ポリアミド樹脂で形成することが必要であると考えられ
る(比較例2を参照)。2) In Example 2 , the first layer and the second layer were formed of the PCT resin alone, but they showed good characteristics. When the PCT-based resin is used, the problem of aging can be ignored (see Comparative Example 1 above). However, in order to obtain such good characteristics, it is considered necessary to form the third layer with a thermoplastic polyamide resin (see Comparative Example 2 ).
【0059】3)押出被覆後に冷却工程を設けた実施例
2,3の絶縁電線は、層間剥離性が優れている。
4)最外層がPET系樹脂で形成された比較例12の絶
縁電線は、経時変化が大きい。これは最外層をポリアミ
ド樹脂ではなく、PET系樹脂で形成したためPCTの
劣化が進みやすくなっているからであると考えられる。
また、これはコイル加工性が劣っていた。3) Example in which a cooling step was provided after extrusion coating
The second and third insulated electric wires have excellent delamination properties. 4) The insulated wire of Comparative Example 12 in which the outermost layer was formed of PET resin showed a large change with time. It is considered that this is because the outermost layer is formed of the PET resin instead of the polyamide resin, so that the deterioration of the PCT is likely to proceed.
Moreover, this was inferior in coil workability.
【0060】5)変性材が過剰に配合されている比較例
14の絶縁電線では、耐熱性が低下している。以上のことから、3層の絶縁層4b、4c、4dと導体
4aを有する本発明に係る多層絶縁電線をボビンに一次
巻線として巻回し、該巻回された一次巻線の外側に、同
じく3層の絶縁層6b、6c、6dと導体6aを有する
本発明に係る多層絶縁電線を二次巻線として巻回した変
圧器(図2)は、これら多層絶縁電線がIEC規格95
0で規定する電気的特性を実現できるところから、絶縁
テープによる一次巻線と二次巻線間の絶縁を不要とし、
かつ、縁面距離を確保する絶縁バリヤも不要とすること
ができる。 5) Comparative example in which the modifier is excessively blended
The insulated wire of No. 14 has reduced heat resistance. From the above, the three insulating layers 4b, 4c and 4d and the conductor
The multi-layer insulated wire according to the present invention having 4a is primaryly mounted on the bobbin.
It is wound as a winding, and is wound on the outside of the wound primary winding.
It has three insulating layers 6b, 6c, 6d and a conductor 6a.
A case where the multilayer insulated wire according to the present invention is wound as a secondary winding
In the pressure device (Fig. 2), these multilayer insulated wires are IEC standard 95
Insulation from the point where the electrical characteristics specified by 0 can be realized
The insulation between the primary winding and the secondary winding with tape is unnecessary,
In addition, no insulating barrier is required to secure the edge distance.
You can
【0061】[0061]
【発明の効果】以上の説明で明らかなように、本発明の
多層絶縁電線は、その絶縁層がいずれも押出被覆で形成
されるので製造時における生産性は高く、また、絶縁層
は半田付け特性,耐熱性,耐クレージング性,層間剥離
性,電気絶縁性が優れしかも特性の経時劣化は小さいの
で、IEC規格を満足する新規構造の変圧器の巻線やリ
ード線として有用である。そして、最外層はポリアミド
樹脂を主成分とする被覆層になっているので、その摩擦
係数は小さい。したがって、コイル加工時には、最外層
に損傷はつきづらくなり、コイル加工後の絶縁特性の劣
化は起こりにくくなる。また、本発明方法によれば、多
層絶縁電線を効率よく製造することができる。As is clear from the above description, the multilayer insulated wire of the present invention has high productivity at the time of manufacture because all the insulating layers are formed by extrusion coating, and the insulating layers are soldered. It has excellent characteristics, heat resistance, crazing resistance, delamination resistance, and electrical insulation, and its characteristics do not deteriorate over time. Therefore, it is useful as a winding wire or lead wire for a transformer with a new structure that satisfies the IEC standard. Since the outermost layer is a coating layer containing a polyamide resin as a main component, its friction coefficient is small. Therefore, during coil processing, the outermost layer is less likely to be damaged, and deterioration of insulation characteristics after coil processing is less likely to occur. Moreover, according to the method of the present invention, a multilayer insulated wire can be efficiently manufactured.
【図1】従来構造の変圧器の1例を示す断面図である。FIG. 1 is a sectional view showing an example of a transformer having a conventional structure.
【図2】3層絶縁電線を巻線とする構造の変圧器の例を
示す断面図である。FIG. 2 is a cross-sectional view showing an example of a transformer having a structure having a three-layer insulated wire as a winding wire.
【符号の説明】 1 フェライトコア 2 ボビン 3 絶縁バリヤ 4 一次巻線 4a 導体 4b,4c,4d 絶縁層 5 絶縁テープ 6 二次巻線 6a 導体 6b,6c,6d 絶縁層[Explanation of symbols] 1 Ferrite core 2 bobbins 3 Insulation barrier 4 primary winding 4a conductor 4b, 4c, 4d insulating layer 5 insulating tape 6 secondary winding 6a conductor 6b, 6c, 6d insulating layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 勇 東京都千代田区丸の内2丁目6番1号 古河電気工業株式会社内 (72)発明者 井上 満 東京都千代田区丸の内2丁目6番1号 古河電気工業株式会社内 (72)発明者 中村 信之 東京都千代田区丸の内2丁目6番1号 古河電気工業株式会社内 (56)参考文献 特開 昭59−130008(JP,A) 特開 昭56−112019(JP,A) 実開 平3−110721(JP,U) 実開 平4−101315(JP,U) (58)調査した分野(Int.Cl.7,DB名) H01B 7/02 H01B 3/30 H01B 13/14 H01F 5/06 H01F 27/28 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Isamu Kobayashi 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Mitsuru Inoue 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Industry Co., Ltd. (72) Inventor Nobuyuki Nakamura 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (56) Reference JP 59-130008 (JP, A) JP 56- 112019 (JP, A) Actual development 3-110721 (JP, U) Actual development 4-101315 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H01B 7/02 H01B 3 / 30 H01B 13/14 H01F 5/06 H01F 27/28
Claims (9)
縁層とから成る多層絶縁電線において、導体側から1層
目および2層目の絶縁層が、 (a)脂肪族アルコール成分と酸成分とを結合して形成
される熱可塑性直鎖ポリエステル樹脂100重量部に対
し、側鎖にカルボン酸またはカルボン酸の金属塩を有す
るエチレン系共重合体5〜40重量部を配合して成る樹
脂混和物の押出被覆層、 (b)全部または一部が脂環族アルコール成分と酸成分
とを結合して形成される熱可塑性直鎖ポリエステル樹脂
を主成分とする押出被覆層、 (c)全部または一部が脂環族アルコール成分と酸成分
とを結合して形成される熱可塑性直鎖ポリエステル樹脂
100重量部に対し、側鎖にカルボン酸またはカルボン
酸の金属塩を有するエチレン系共重合体50重量部以下
を配合して成る樹脂混和物の押出被覆層、のいずれかで
あり、3層目の絶縁層が、熱可塑性ポリアミド樹脂また
は熱可塑性ポリアミド樹脂を主成分とする樹脂混和物の
押出被覆層であり、前記各絶縁層の形成時には、下層の
押出被覆が終了した時点で、その押出被覆層の表面を1
00℃以下に冷却したのち、上層の押出被覆層が形成さ
れていることを特徴とする、絶縁層相互間の剥離性が良
好であり、かつコイル加工性が良好な多層絶縁電線。1. In a multi-layer insulated wire comprising a conductor and three or more insulating layers covering the conductor, the first and second insulating layers from the conductor side are (a) an aliphatic alcohol component and an acid. Resin obtained by blending 5 to 40 parts by weight of an ethylene-based copolymer having a carboxylic acid or a metal salt of a carboxylic acid in a side chain with 100 parts by weight of a thermoplastic linear polyester resin formed by combining components. Extrusion coating layer of admixture, (b) Extrusion coating layer containing, as a main component, a thermoplastic linear polyester resin formed wholly or partially by combining an alicyclic alcohol component and an acid component, (c) all Alternatively, an ethylene-based copolymer having a carboxylic acid or a metal salt of a carboxylic acid in a side chain with respect to 100 parts by weight of a thermoplastic linear polyester resin partially formed by binding an alicyclic alcohol component and an acid component 50 layers An extrusion coating layer of a resin mixture containing less than 1 part by weight of the resin mixture, wherein the third insulating layer is a thermoplastic polyamide resin or an extrusion coating of a resin mixture containing a thermoplastic polyamide resin as a main component. When forming each of the above-mentioned insulating layers, the surface of the extrusion coating layer is covered with 1 layer at the time when the extrusion coating of the lower layer is completed.
A multi-layer insulated electric wire having good exfoliation between insulating layers and good coil workability, which is characterized in that an extruded coating layer as an upper layer is formed after cooling to 00 ° C or lower.
サンジメタノールである請求項1の多層絶縁電線。2. The multilayer insulated wire according to claim 1, wherein the alicyclic alcohol component is cyclohexanedimethanol.
層が、いずれも、前記(a)の押出被覆層である請求項
1の多層絶縁電線。3. The multilayer insulated wire according to claim 1, wherein both the first insulating layer and the second insulating layer are the extruded coating layer of (a).
層が、いずれも、前記(b)または(c)の押出被覆層
である請求項1の多層絶縁電線。4. The multi-layer insulated wire according to claim 1, wherein the first insulating layer and the second insulating layer are both extruded coating layers of (b) or (c).
目の絶縁層または3層目のいずれか厚い方の絶縁層の厚
みの2倍以上である請求項1の多層絶縁電線。5. The multilayer insulated wire according to claim 1, wherein the thickness of the second insulating layer is at least twice the thickness of the thicker insulating layer of the first insulating layer or the third insulating layer. .
ンから成る請求項1の多層絶縁電線。6. The multilayer insulated wire according to claim 1, wherein the third insulating layer is made of 4,6-nylon.
沿う切れ目とを絶縁層に刻設した状態で前記電線を直線
状に保持し、前記電線の長手方向を中心軸にして前記電
線を捻回したときに、導体が切れる前に、前記絶縁層の
各層が互いに分離する、請求項1の多層絶縁電線。7. The electric wire is held linearly in a state in which a cut along the longitudinal direction of the electric wire and a cut along the circumferential direction are formed in the insulating layer, and the electric wire is held with the longitudinal direction of the electric wire as a central axis. The multi-layer insulated wire of claim 1, wherein when twisted, the layers of the insulating layer separate from each other before the conductor breaks.
に、導体側から1層目の絶縁層を押出被覆して形成した
のち、前記絶縁層の表面を100℃以下に冷却する操作
を行うことを特徴とする、絶縁層相互間の剥離性が良好
であり、かつコイル加工性が良好な多層絶縁電線の製造
方法。8. When manufacturing the multi-layer insulated wire according to claim 1, an operation of cooling the surface of the insulating layer to 100 ° C. or lower after forming the first insulating layer by extrusion coating from the conductor side. A method for producing a multi-layer insulated wire, which is characterized in that peeling between insulating layers is good and coil workability is good.
巻線の外側に少なくとも第二の巻線を巻回した変圧器で
あって、 第一および第二の巻線の少なくとも一方は、請求項1乃
至請求項6に記載の多層絶縁電線であることを特徴とす
る変圧器。9. A transformer in which a first winding is wound around a bobbin, and at least a second winding is wound outside the first winding, the transformer comprising: At least one is the multi-layer insulated wire according to any one of claims 1 to 6, and is a transformer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27048493A JP3485950B2 (en) | 1992-10-28 | 1993-10-28 | Multilayer insulated wire and method of manufacturing the same |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4-290160 | 1992-10-28 | ||
JP29016092 | 1992-10-28 | ||
JP27048493A JP3485950B2 (en) | 1992-10-28 | 1993-10-28 | Multilayer insulated wire and method of manufacturing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06223634A JPH06223634A (en) | 1994-08-12 |
JP3485950B2 true JP3485950B2 (en) | 2004-01-13 |
Family
ID=26549238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27048493A Expired - Lifetime JP3485950B2 (en) | 1992-10-28 | 1993-10-28 | Multilayer insulated wire and method of manufacturing the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3485950B2 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11176245A (en) * | 1997-10-14 | 1999-07-02 | Furukawa Electric Co Ltd:The | Multi-layer insulated wire and transformer using it |
JPH11176246A (en) | 1997-10-24 | 1999-07-02 | Furukawa Electric Co Ltd:The | Multi-layer insulated wire and transformer using it |
JP2001084836A (en) * | 1999-09-17 | 2001-03-30 | Du Pont Mitsui Polychem Co Ltd | High polymer electrical insulating material |
TW495771B (en) * | 2000-01-25 | 2002-07-21 | Furukawa Electric Co Ltd | Multilayer insulated wire and transformer using the same |
TWI348714B (en) | 2004-04-28 | 2011-09-11 | Furukawa Electric Co Ltd | Multilayer insulated wire and transformer made using the same |
DE602006019767D1 (en) * | 2005-09-30 | 2011-03-03 | Furukawa Electric Co Ltd | MULTILAYER ELECTRICALLY INSULATED WIRE AND TRANSFORMER THEREWITH |
WO2007114257A1 (en) * | 2006-03-31 | 2007-10-11 | The Furukawa Electric Co., Ltd. | Multilayer insulated electric wire |
JP5405729B2 (en) * | 2007-03-12 | 2014-02-05 | パナソニック株式会社 | Toilet seat device |
JP4897963B2 (en) * | 2007-03-28 | 2012-03-14 | 古河電気工業株式会社 | Multilayer insulated wire and transformer using the same |
JP4780025B2 (en) * | 2007-04-20 | 2011-09-28 | パナソニック株式会社 | Toilet seat device |
US20110174520A1 (en) | 2008-07-29 | 2011-07-21 | The Furukawa Electric Co., Ltd. | Insulated electric wire |
JP5520493B2 (en) | 2008-10-20 | 2014-06-11 | 古河電気工業株式会社 | Multilayer insulated wire and transformer using the same |
CN102498526A (en) | 2009-09-02 | 2012-06-13 | 古河电气工业株式会社 | Multilayer insulated wire and transformer using same |
KR101741305B1 (en) | 2012-03-27 | 2017-05-29 | 후루카와 덴키 고교 가부시키가이샤 | Multi-layer insulated electrical wiring and electrical/electronic device using same |
WO2014084063A1 (en) * | 2012-11-30 | 2014-06-05 | 古河電気工業株式会社 | Insulated wire and electrical/electronic device |
-
1993
- 1993-10-28 JP JP27048493A patent/JP3485950B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH06223634A (en) | 1994-08-12 |
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