JP3285097B2 - Insulated wire - Google Patents
Insulated wireInfo
- Publication number
- JP3285097B2 JP3285097B2 JP20961092A JP20961092A JP3285097B2 JP 3285097 B2 JP3285097 B2 JP 3285097B2 JP 20961092 A JP20961092 A JP 20961092A JP 20961092 A JP20961092 A JP 20961092A JP 3285097 B2 JP3285097 B2 JP 3285097B2
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- copolymer
- tetrafluoroethylene
- insulated wire
- coating layer
- 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 - Fee Related
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- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は航空機の機内配線等に用
いられる耐摩耗性と耐熱老化性にすぐれるフッ素樹脂絶
縁電線に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluororesin insulated wire having excellent abrasion resistance and heat aging resistance, which is used for wiring inside an aircraft.
【０００２】[0002]
【従来の技術】ＰＴＦＥ樹脂（四フッ化エチレン樹
脂）、ＰＦＡ樹脂（パーフルオロビニルエーテル共重合
体）、ＦＥＰ樹脂（テトラフルオロエチレンヘキサフル
オロプロピレン共重合体）、ＥＴＦＥ樹脂（エチレンテ
トラフルオロエチレン共重合体）等のフッ素樹脂は耐熱
性や耐薬品性にすぐれる材料であり、電線、ケーブルの
被覆材料として幅広く活用されている。この中でもＥＴ
ＦＥ樹脂は耐摩耗性にもすぐれ、又加速電子線やガンマ
線等の電離放射線の照射によって架橋体とすることがで
きるので、融点以上の高温条件下でも溶融変形しないフ
ッ素樹脂とすることができ、このような特徴から架橋Ｅ
ＴＦＥ樹脂は航空機の機内配線用の絶縁材料の被覆材料
の一つに指定されている。2. Description of the Related Art PTFE resin (tetrafluoroethylene resin), PFA resin (perfluorovinyl ether copolymer), FEP resin (tetrafluoroethylene hexafluoropropylene copolymer), ETFE resin (ethylenetetrafluoroethylene copolymer) ) Is a material having excellent heat resistance and chemical resistance, and is widely used as a covering material for electric wires and cables. Among them, ET
FE resin has excellent abrasion resistance, and can be made into a crosslinked body by irradiation with ionizing radiation such as an accelerated electron beam or gamma ray. Because of these characteristics, the crosslinked E
TFE resin is specified as one of the coating materials of insulating materials for in-flight wiring of aircraft.
【０００３】[0003]
【発明が解決しようとする課題】航空機の機内配線用の
絶縁電線には、図１のような耐摩耗試験や図２のような
150℃でのカットスルー試験の他、 230℃で 500時間の
熱老化試験等数多くの厳しい規格試験がある。図１は耐
摩耗試験の概念図で、３ポンドの荷重をかけた90°刃
を、試料の上を往復運動させ、刃先と導体が導通するま
での往復回数を求める。又図２は 150℃のカットスルー
試験の概念図で、90°刃を試料に対して一定速度で押込
み、刃先と導体が導通した時の荷重を求める。上記規格
試験中でも耐摩耗試験は最も技術的に困難とみられる項
目である。耐摩耗試験では、荷重が３ポンドで50サイク
ル以上の耐摩耗性が要求されている。An insulated wire for in-flight wiring of an aircraft has a wear resistance test as shown in FIG. 1 and an insulated wire as shown in FIG.
In addition to the cut-through test at 150 ° C, there are many strict standard tests such as the heat aging test at 230 ° C for 500 hours. FIG. 1 is a conceptual diagram of the abrasion resistance test, in which a 90 ° blade with a load of 3 lbs is reciprocated on a sample, and the number of reciprocations until the blade tip and the conductor are conducted is determined. FIG. 2 is a conceptual diagram of a cut-through test at 150 ° C. In which a 90 ° blade is pushed into the sample at a constant speed, and the load when the cutting edge and the conductor are conducted is determined. The abrasion resistance test is the most technically difficult item among the above standard tests. In the abrasion resistance test, abrasion resistance of 50 pounds or more at a load of 3 pounds is required.
【０００４】航空機の機内配線に使用されている絶縁電
線の一例としては、ＡＷＧ20サイズの錫メッキ軟銅導体
に架橋ＥＴＦＥ樹脂を、それぞれ５ミルの厚みで二層に
被覆した構造の電線を代表的な例として挙げることがで
きる。例えば、ＥＴＦＥ樹脂 100重量部に架橋助剤とし
てトリアリルイソシアヌレートを４重量部添加した樹脂
組成物を、上記の導体上に、それぞれ５ミルの厚みで二
層に被覆し、加速電圧１MVの電子線を10Mrad照射した絶
縁電線は、 150℃のカットスルー試験は、カットスルー
抵抗が6.4 〜 7.0ポンドｆと、規格値の６ポンド以上を
満足するが、耐摩耗試験では耐久回数48〜52サイクルと
規格の50サイクルに対して余裕がないという問題があ
る。A typical example of an insulated wire used for in-flight wiring of an aircraft is a wire having a structure in which a cross-linked ETFE resin is coated in two layers with a thickness of 5 mils on a tinned soft copper conductor of AWG20 size. Examples can be given. For example, a resin composition obtained by adding 4 parts by weight of triallyl isocyanurate as a cross-linking aid to 100 parts by weight of ETFE resin is coated on the above conductor in two layers each having a thickness of 5 mils. The insulated wire irradiated with 10Mrad of wire satisfies the cut-through resistance of 6.4 to 7.0 pounds f in the cut-through test at 150 ° C and the standard value of 6 pounds or more, but has a durability of 48 to 52 cycles in the wear resistance test. There is a problem that there is no margin for the standard 50 cycles.
【０００５】[0005]
【課題を解決するための手段】本発明は上述の問題点を
解消した絶縁電線を提供するもので、その第１の特徴
は、導体上に、エチレンテトラフルオロエチレン共重合
体と、エチレンとテトラフルオロエチレンとフッ素化オ
レフィンを繰返し単位とする共重合体の混合比が重量比
で2/8 〜 7/3の混合物を主体とするフッ素樹脂組成物を
具え、当該被覆層が電離放射線の照射により架橋されて
いる絶縁電線にあり、第２の特徴は、導体上に、エチレ
ンテトラフルオロエチレン共重合体を主体とするフッ素
樹脂組成物の被覆層と、エチレンとテトラフルオロエチ
レンとフッ素化オレフィンを繰返し単位とする共重合体
を主体とするフッ素樹脂組成物の被覆層を具え、これら
被覆層が電離放射線により架橋されている絶縁電線にあ
る。SUMMARY OF THE INVENTION The present invention provides an insulated wire which solves the above-mentioned problems. The first feature of the present invention is that an ethylene-tetrafluoroethylene copolymer, ethylene-tetra A mixing ratio of a copolymer having fluoroethylene and a fluorinated olefin as a repeating unit is a weight ratio of 2/8 to 7/3, and the coating layer comprises a fluororesin composition, and the coating layer is irradiated with ionizing radiation. The second feature is that the insulated wire is cross-linked, and the second feature is that a coating layer of a fluororesin composition mainly composed of an ethylene tetrafluoroethylene copolymer, and ethylene, tetrafluoroethylene and a fluorinated olefin are repeatedly formed on the conductor. An insulated wire comprising a coating layer of a fluororesin composition mainly comprising a copolymer as a unit, wherein the coating layer is cross-linked by ionizing radiation.
【０００６】本発明にいうエチレンとテトラフルオロエ
チレンとフッ素化オレフィンを繰返し単位とする共重合
体のフッ素化オレフィンとしては、１，１−ジヒドロパ
ーフルオロプロペン−１、１，１−ジヒドロパーフルオ
ロブテン−１、ヘキサフルオロプロペン、３，３，３−
トリフルオロプペン、３，３，３−トリフルオロ−２−
トリフルオロメチルプロペン、パーフルオロアルキルビ
ニルエーテル、フッ化ビニリデン等が挙げられる。The fluorinated olefin of the copolymer containing ethylene, tetrafluoroethylene and a fluorinated olefin as repeating units in the present invention includes 1,1-dihydroperfluoropropene-1,1,1-dihydroperfluorobutene -1, hexafluoropropene, 3,3,3-
Trifluoropropene, 3,3,3-trifluoro-2-
Trifluoromethylpropene, perfluoroalkyl vinyl ether, vinylidene fluoride and the like.
【０００７】エチレンテトラフルオロエチレン共重合体
と、エチレンとテトラフルオロエチレンとフッ素化オレ
フィンを繰返し単位とする共重合体の混合物を主体とす
るフッ素樹脂組成物に加速電子線等の電離放射線を照射
する方法で架橋し、融点以上の温度でも溶融変形をなく
するには、ＥＴＦＥ樹脂を主体とする樹脂組成物の場合
と同様に、トリアリルイソシアヌレートやトリメチロー
ルプロパントリメタクリレートのような多官能性モノマ
ーを添加することが好ましく、このことは、エチレンと
エチレンテトラフルオロエチレンとフッ素化オレフィン
を繰返し単位とする共重合体を主体とする樹脂組成物の
場合も同様である。Irradiating ionizing radiation such as an accelerated electron beam to a fluororesin composition mainly comprising a mixture of an ethylene tetrafluoroethylene copolymer and a copolymer having ethylene, tetrafluoroethylene and a fluorinated olefin as a repeating unit. In order to crosslink by the method and eliminate the melt deformation even at a temperature higher than the melting point, a polyfunctional monomer such as triallyl isocyanurate or trimethylolpropane trimethacrylate is used in the same manner as in the case of the resin composition mainly composed of ETFE resin. Is preferably added, and this is the same in the case of a resin composition mainly composed of a copolymer containing ethylene, ethylenetetrafluoroethylene and a fluorinated olefin as a repeating unit.
【０００８】耐摩耗試験に関しては、前述のように、Ａ
ＷＧ20サイズの錫メッキ軟銅導体にＥＴＦＥ（メルトフ
ローレート：４、300℃、2160ｇ） 100重量部にトリア
リルイソシアヌレートを４重量部添加した樹脂組成物
を、それぞれ５ミルの厚みで二層に被覆し、加速電圧が
１MVの電子線を10Mrad照射した絶縁電線は、耐摩耗試験
では48〜52サイクルであったのに対し、例えば、エチレ
ンテトラフルオロエチレン共重合体と、エチレンとテト
ラフルオロエチレンとフッ素化オレフィンを繰返し単位
とする共重合体（フッ素含有量66重量％、融点 224℃、
メルトフローレート11）の１／１（重量比）混合物 100
重量部に対し、トリアリルイソシアヌレートを４重量部
を添加した樹脂組成物を同じ導体に同じ厚みで二層に被
覆し、電子線を10Mradの照射した試料では、 150℃のカ
ットスルー抵抗を低下させることなく、耐摩耗試験を66
〜75サイクルに向上させることができた。しかも、 230
℃、500時間後の熱老化試験後の絶縁体の特性も、前述
のＥＴＦＥ絶縁の電線よりすぐれることを見出した。以
下に実施例に基づき本発明をさらに詳細に説明する。[0008] Regarding the wear resistance test, as described above, A
A WG20-sized tinned annealed copper conductor is coated with a resin composition obtained by adding 4 parts by weight of triallyl isocyanurate to 100 parts by weight of ETFE (melt flow rate: 4, 300 ° C., 2160 g) in a two-layer thickness of 5 mils each. An insulated wire irradiated with an electron beam having an acceleration voltage of 1 MV at 10 Mrad was subjected to 48 to 52 cycles in an abrasion resistance test, whereas, for example, ethylene tetrafluoroethylene copolymer, ethylene, tetrafluoroethylene and fluorine were used. Copolymer containing repeating olefin (fluorine content 66% by weight, melting point 224 ° C,
Melt flow rate 11) 1/1 (weight ratio) mixture 100
A resin composition obtained by adding 4 parts by weight of triallyl isocyanurate to the same parts is coated on the same conductor in two layers with the same thickness, and the sample irradiated with 10 Mrad of electron beam reduces the cut-through resistance at 150 ° C. Without abrasion tests
Could be improved to ~ 75 cycles. And 230
It has also been found that the properties of the insulator after the heat aging test at 500 ° C. for 500 hours are better than the above-mentioned ETFE-insulated wires. Hereinafter, the present invention will be described in more detail based on examples.
【０００９】[0009]
【実施例】二軸混練押出装置を用いて、表１記載の樹脂
組成物を吐出部温度240 〜 280℃に設定して混練し、吐
出ストランドを水冷して切断し、ペレット化した。30mm
φの単軸押出機を用いて、ＡＷＧ20サイズの錫メッキ軟
銅導体上に、上記の樹脂組成物を、押出温度300 〜 320
℃で押出被覆し、加速電圧が１MVの電子線を１Mrad照射
して試料とした。結果を表２〜４に示す。耐摩耗試験は
荷重３ポンド、カットスルー試験は 150℃で行ない、そ
れぞれｎ＝５で実施して最小値と最大値を記載した。又
初期抗張力と伸び、 230℃、 500時間熱老化後の抗張力
と伸びは、内層と外層の被覆層を一緒に 500mm／分の速
度で、ｎ＝３で引張試験した場合の平均値を記載した。EXAMPLES Using a twin-screw kneading extruder, the resin compositions shown in Table 1 were kneaded at a discharge temperature of 240 to 280 ° C., and the discharged strands were cooled with water, cut and pelletized. 30mm
Using a φ single screw extruder, apply the above resin composition on an AWG20 size tinned soft copper conductor at an extrusion temperature of 300 to 320.
Extrusion coating was performed at ℃, and an electron beam having an acceleration voltage of 1 MV was irradiated with 1 Mrad to obtain a sample. The results are shown in Tables 2 to 4. The abrasion resistance test was performed at a load of 3 pounds, and the cut-through test was performed at 150 ° C. The initial tensile strength and elongation, and the tensile strength and elongation after heat aging at 230 ° C. for 500 hours, are the average values when the inner layer and the outer layer were subjected to a tensile test at a speed of 500 mm / min and n = 3 at a rate of 500 mm / min. .
【００１０】[0010]
【表１】 [Table 1]
【００１１】[0011]
【表２】 [Table 2]
【００１２】[0012]
【表３】 [Table 3]
【００１３】[0013]
【表４】 [Table 4]
【００１４】実施例１〜３は、エチレンテトラフルオロ
エチレン共重合体と、エチレンとテトラフルオロエチレ
ンとフッ素化オレフィンを繰返し単位とする共重合体の
混合物を主体とする樹脂組成物を内外絶縁層とする試料
であり、被覆層がエチレンテトラフルオロエチレン共重
合体単独の比較例３や、エチレンとテトラフルオロエチ
レンとフッ素化オレフィンを繰返し単位とする共重合体
単独の比較例１．２の場合に比べ、耐摩耗試験の特性が
向上しており、規格値に対して十分余裕のある特性が得
られる。又 230℃、 500時間の熱老化試験後の被覆層の
伸びも比較例３のエチレンテトラフルオロエチレン共重
合体単独の場合よりもすぐれている。In Examples 1 to 3, a resin composition mainly composed of an ethylene tetrafluoroethylene copolymer and a mixture of a copolymer having ethylene, tetrafluoroethylene and a fluorinated olefin as a repeating unit was used as an inner and outer insulating layer. Compared with Comparative Example 3 in which the coating layer is an ethylene tetrafluoroethylene copolymer alone or Comparative Example 1.2 in which the copolymer alone has ethylene, tetrafluoroethylene and a fluorinated olefin as a repeating unit. In addition, the characteristics of the abrasion resistance test are improved, and characteristics having a sufficient margin with respect to the standard value can be obtained. Also, the elongation of the coating layer after the heat aging test at 230 ° C. for 500 hours is superior to that of the ethylene tetrafluoroethylene copolymer of Comparative Example 3 alone.
【００１５】又実施例９〜11はエチレンテトラフルオロ
エチレン共重合体と、エチレンとテトラフルオロエチレ
ンとフッ素化オレフィンを繰返し単位とする共重合体の
混合物を主体とする樹脂組成物を、単層で10ミルの厚み
で被覆したものであり、実施例１〜３とほぼ同様に、耐
摩耗性、カットスルー抵抗及び熱老性特性ともに比較例
３のエチレンテトラフルオロエチレン共重合体単独の場
合よりもすぐれている。 一方、比較例４はエチレンテ
トラフルオロエチレン共重合体と、エチレンとテトラフ
ルオロエチレンとフッ素化オレフィンを繰返し単位とす
る共重合体の混合比が重量比９／１で混合した樹脂組成
物を使用した試料であり、耐摩耗性が50サイクル未満で
ある。In Examples 9 to 11, a resin composition mainly composed of a mixture of an ethylene tetrafluoroethylene copolymer and a copolymer containing ethylene, tetrafluoroethylene and a fluorinated olefin as a repeating unit was used. It was coated at a thickness of 10 mils, and the abrasion resistance, the cut-through resistance and the heat aging characteristics were substantially the same as those of the ethylene tetrafluoroethylene copolymer of Comparative Example 3 alone, as in Examples 1 to 3. It is excellent. On the other hand, Comparative Example 4 used a resin composition in which a mixing ratio of an ethylene tetrafluoroethylene copolymer and a copolymer having ethylene, tetrafluoroethylene, and a fluorinated olefin as a repeating unit was 9/1 by weight. It is a sample and has a wear resistance of less than 50 cycles.
【００１６】実施例４〜８は、エチレンテトラフルオロ
エチレン共重合体を主体とする樹脂組成物層と、エチレ
ンとテトラフルオロエチレンとフッ素化オレフィンを繰
返し単位とする共重合体を主体とする樹脂組成物層をそ
れぞれ内外層に被覆した絶縁電線であり、比較例１〜３
に比べ、耐摩耗性がすぐれている。又実施例４〜８の中
では、導体側にエチレンテトラフルオロエチレン共重合
体を主体とする被覆層を設けた実施例４〜７が実施例８
のエチレンテトラフルオロエチレン共重合体を主体とす
る被覆層を外層に設けた構造のものより、 230℃、500
時間熱老化後の伸びも大きく耐熱老化性がすぐれてい
る。Examples 4 to 8 show a resin composition layer mainly composed of an ethylene tetrafluoroethylene copolymer and a resin composition mainly composed of a copolymer mainly composed of ethylene, tetrafluoroethylene and fluorinated olefin. Are insulated wires in which the material layer is coated on the inner and outer layers, respectively, and Comparative Examples 1 to 3
Has better wear resistance than In Examples 4 to 8, Examples 4 to 7 in which a coating layer mainly composed of an ethylene tetrafluoroethylene copolymer is provided on the conductor side are Examples 8 to 8.
From the structure in which the outer layer is provided with a coating layer mainly composed of an ethylene tetrafluoroethylene copolymer,
The heat elongation after heat aging is large and the heat aging resistance is excellent.
【００１７】[0017]
【発明の効果】以上説明したように、本発明の絶縁電線
によれば、耐摩耗性、カットスルー特性、耐熱老化性に
すぐれ、航空機の機内配線用等の電線として利用すると
き、その価値は非常に大きいものがある。As described above, according to the insulated wire of the present invention, it is excellent in abrasion resistance, cut-through characteristics, and heat aging resistance. Some are very large.
【図１】耐摩耗試験の概念図である。FIG. 1 is a conceptual diagram of a wear resistance test.
【図２】カットスルー試験の概念図である。FIG. 2 is a conceptual diagram of a cut-through test.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01B 7/02 C08J 3/28 C08L 27/12 C08L 27/18 H01B 3/44 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) H01B 7/02 C08J 3/28 C08L 27/12 C08L 27/18 H01B 3/44
Claims (3)
レン共重合体と、エチレンとテトラフルオロエチレンと
フッ素化オレフィンを繰返し単位とする共重合体の混合
比が重量比で2/8 〜 7/3の混合物を主体とするフッ素樹
脂組成物の被覆層を具え、当該被覆層が電離放射線の照
射により架橋されていることを特徴とする絶縁電線。A mixture of an ethylene tetrafluoroethylene copolymer and a copolymer containing ethylene, tetrafluoroethylene and a fluorinated olefin as a repeating unit in a weight ratio of 2/8 to 7/3 on a conductor. An insulated wire comprising a coating layer of a fluororesin composition mainly composed of a mixture, wherein the coating layer is cross-linked by irradiation with ionizing radiation.
レン共重合体を主体とするフッ素樹脂組成物の被覆層
と、エチレンとテトラフルオロエチレンとフッ素化オレ
フィンを繰返し単位とする共重合体を主体とするフッ素
樹脂組成物の被覆層を具え、これら被覆層が電離放射線
の照射により架橋されていることを特徴とする絶縁電
線。2. A coating layer of a fluororesin composition mainly composed of an ethylene tetrafluoroethylene copolymer on a conductor, and a copolymer mainly composed of ethylene, tetrafluoroethylene and a fluorinated olefin as a repeating unit. An insulated wire comprising a coating layer of a fluororesin composition, wherein the coating layer is cross-linked by irradiation with ionizing radiation.
ロエチレン共重合体を主体とするフッ素樹脂組成物であ
ることを特徴とする請求項２記載の絶縁電線。3. The insulated wire according to claim 2, wherein the covering layer on the conductor side is a fluororesin composition mainly composed of an ethylene tetrafluoroethylene copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20961092A JP3285097B2 (en) | 1992-07-13 | 1992-07-13 | Insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20961092A JP3285097B2 (en) | 1992-07-13 | 1992-07-13 | Insulated wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0636618A JPH0636618A (en) | 1994-02-10 |
| JP3285097B2 true JP3285097B2 (en) | 2002-05-27 |
Family
ID=16575658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20961092A Expired - Fee Related JP3285097B2 (en) | 1992-07-13 | 1992-07-13 | Insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3285097B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3001427A1 (en) * | 2013-05-21 | 2016-03-30 | Asahi Glass Company, Limited | Coating resin composition for electric wire, and electric wire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9728298B2 (en) | 2015-06-26 | 2017-08-08 | Daikin America, Inc. | Radiation crosslinked fluoropolymer compositions containing low level of extractable fluorides |
-
1992
- 1992-07-13 JP JP20961092A patent/JP3285097B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3001427A1 (en) * | 2013-05-21 | 2016-03-30 | Asahi Glass Company, Limited | Coating resin composition for electric wire, and electric wire |
| EP3001427A4 (en) * | 2013-05-21 | 2016-12-21 | Asahi Glass Co Ltd | Coating resin composition for electric wire, and electric wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0636618A (en) | 1994-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |