JPH0398212A - Electric cable - Google Patents
Electric cableInfo
- Publication number
- JPH0398212A JPH0398212A JP23661189A JP23661189A JPH0398212A JP H0398212 A JPH0398212 A JP H0398212A JP 23661189 A JP23661189 A JP 23661189A JP 23661189 A JP23661189 A JP 23661189A JP H0398212 A JPH0398212 A JP H0398212A
- Authority
- JP
- Japan
- Prior art keywords
- electric cable
- resin layer
- polyethylene
- fire
- sheath
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- -1 polyethylene Polymers 0.000 abstract description 12
- 239000004698 Polyethylene Substances 0.000 abstract description 10
- 229920000573 polyethylene Polymers 0.000 abstract description 9
- 239000004020 conductor Substances 0.000 abstract description 7
- 239000004696 Poly ether ether ketone Substances 0.000 abstract description 5
- 229920002530 polyetherether ketone Polymers 0.000 abstract description 5
- 229920000915 polyvinyl chloride Polymers 0.000 abstract description 5
- 239000004800 polyvinyl chloride Substances 0.000 abstract description 5
- 239000012212 insulator Substances 0.000 abstract description 4
- 229920001971 elastomer Polymers 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000002033 PVDF binder Substances 0.000 abstract description 2
- 239000004952 Polyamide Substances 0.000 abstract description 2
- 229920001577 copolymer Polymers 0.000 abstract description 2
- 239000000806 elastomer Substances 0.000 abstract description 2
- 229920002647 polyamide Polymers 0.000 abstract description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 abstract description 2
- 230000009970 fire resistant effect Effects 0.000 abstract 3
- 230000002787 reinforcement Effects 0.000 abstract 3
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 abstract 1
- 229920000299 Nylon 12 Polymers 0.000 abstract 1
- 229920001748 polybutylene Polymers 0.000 abstract 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 5
- 239000003063 flame retardant Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- SUBDBMMJDZJVOS-UHFFFAOYSA-N 5-methoxy-2-{[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl}-1H-benzimidazole Chemical compound N=1C2=CC(OC)=CC=C2NC=1S(=O)CC1=NC=C(C)C(OC)=C1C SUBDBMMJDZJVOS-UHFFFAOYSA-N 0.000 description 1
- LLQHSBBZNDXTIV-UHFFFAOYSA-N 6-[5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-4,5-dihydro-1,2-oxazol-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC1CC(=NO1)C1=CC2=C(NC(O2)=O)C=C1 LLQHSBBZNDXTIV-UHFFFAOYSA-N 0.000 description 1
- 229920006370 Kynar Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 241000063195 Victrix Species 0.000 description 1
- 210000003029 clitoris Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、電気ケーブルに関し、さらに詳しくは長時
間クリート把持時に変形の生じない電気ケーブルに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric cable, and more particularly to an electric cable that does not deform when a cleat is held for a long time.
［従来の技術コ
一般に電気ケーブルは、導体上に半導電層、絶縁層など
の被覆層を設け、その外周にさらにシースを設けてなる
ものである。そしてこのシースには従来よりポリ塩化ビ
ニルやポリエチレンなどが広く用いられている。[Prior Art] In general, electric cables are made by providing a covering layer such as a semiconducting layer or an insulating layer on a conductor, and further providing a sheath around the outer periphery of the covering layer. Conventionally, materials such as polyvinyl chloride and polyethylene have been widely used for this sheath.
［発明が解決しようとする課題コ
ところが、上述のようにポリ塩化ビニルやポリエチレン
などからなるシースを有する電気ケーブルにあっては、
この電気ケーブルを長期間低荷重を加えた状態に放置し
た場合、変形を生ずる欠点があり、クリート把持された
場合に経時的にその締付け力が低下してしまう不都合が
あった。特に高温条件下では、このような現象が著しい
傾向にあった。[Problems to be Solved by the Invention] However, as mentioned above, in the case of an electric cable having a sheath made of polyvinyl chloride, polyethylene, etc.,
If this electric cable is left under a low load for a long period of time, it has the disadvantage of deformation, and when gripped by a cleat, its tightening force decreases over time. Particularly under high temperature conditions, this phenomenon tends to be remarkable.
このような現象が起こる原因の一つとして、上記シース
を構戚する材料の弾性率が低いことが挙げられる。すな
わち低荷重下でも外部応力が長時間付加された場合には
、シース内に歪が生じ収縮を来すとともに、この歪が回
復し得ないことが考えられる。すなわちコールドフロー
が発生し、このためにクリート把持時の締付け力が低下
することとなる。One of the reasons why such a phenomenon occurs is that the elastic modulus of the material forming the sheath is low. That is, if external stress is applied for a long time even under a low load, strain will occur within the sheath, causing contraction, and this strain may not be able to recover. In other words, cold flow occurs, which reduces the tightening force when gripping the cleat.
そこでこの発明はこのような課題を解消し、クリート把
持時においてもソースの変形の生じない１
２
電気ケーブルを提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a 1 2 electric cable whose source does not deform even when the cleat is gripped.
［課題を解決するための手段］
この発明は、温度６０℃での５０％モジュラスが１ ．
０ ｋｇｆ／ ｍｕ以上で、かつ酸素指数が２７以
上の熱可塑性樹脂からなる厚さＯ、５ｍｍ以上の強化樹
脂層をケーブルの最外層に設けたことを解決手段とした
。[Means for Solving the Problems] This invention has a 50% modulus of 1.5 at a temperature of 60°C.
The solution was to provide the outermost layer of the cable with a reinforcing resin layer with a thickness of O and 5 mm or more, made of a thermoplastic resin with an oxygen index of 0 kgf/mu or more and an oxygen index of 27 or more.
［作用 ］
このように強化樹脂層を設けたので、電気ケーブルのク
リート把持時の変形が防止されるとともに、難燃性が向
上し、たとえ高温条件下に長期間放置しても、シースの
変形が生じず、電気的、機械的に信頼性の高い電気ケー
ブルが得られる。[Function] By providing the reinforced resin layer in this way, the deformation of the electric cable when the cleat is gripped is prevented, and the flame retardance is improved, so even if the sheath is left under high temperature conditions for a long period of time, the sheath will not deform. Therefore, an electrical cable with high electrical and mechanical reliability can be obtained.
以下、この発明の電気ケーブルを図面を用いて詳しく説
明する。Hereinafter, the electric cable of the present invention will be explained in detail using the drawings.
第１図は、この発明の電気ケーブルの一例を示すもので
ある。FIG. 1 shows an example of the electric cable of the present invention.
第１図中符号ｌは導体であり、この導体１の外周上にポ
リエヂレン、架橋ポリエチレン、エチレンープロピレン
共重合体などからなる絶縁体２が３
被覆され、さらにその外周上にポリエヂレン、ポリ塩化
ビニルなどからなるンース３が設けられており、さらに
その外周上に強化樹脂層４が設けられて、この例の電気
ケーブルが構成されている。1 is a conductor, and the outer periphery of the conductor 1 is coated with an insulator 2 made of polyethylene, crosslinked polyethylene, ethylene-propylene copolymer, etc., and the outer periphery is further coated with polyethylene, polyvinyl chloride, etc. A reinforcing resin layer 4 is further provided on the outer periphery of the reinforcing resin layer 3 to constitute the electrical cable of this example.
強化樹脂層４を戒ず材料には、温度６０゜Ｃでの５０％
モジュラスがＩ ． Ｏ ｋｇｆ／ ｍｒｔｔ以」二で
、かつ酸素指数が２７以上の熱可塑性樹脂が用いられ、
具体的には例えば難燃ボリブヂレンテレフタレート（難
燃ＰＢＴ）タフペットＮ ２１００（三菱レイヨン（株
）製）、難燃ポリエチレンテレフタレート（難燃Ｐ Ｅ
Ｔ ）、難燃ナイロンｌ２、ポリエーテルエーテルケ
トン（ＰＥＥＫ）ビクトリックス３８０Ｇ（三井石油化
学（株）製）、ポリフッ化ビニリデン（Ｐ Ｖ ＤＦ）
カイナー＃ ４６０（日本合或ゴム（株）製）、ポリア
ミドエラストマー ダイアミドＰＡＥ Ｅ６２（ダイ
セルヒュルス製）などがある。中でも、高い５０％モジ
ュラスと高い酸素指数を有することから、特にＰＥＥＫ
が好適に用いられる。ここで温度６０℃での５０％モジ
ュラスをＩ ． Ｏ ｋｇｆ／ｍ戸以上と限定したのは
、この値未満であると、強化４
樹脂層４の弾性率および強度が不十分で、クリート把持
時の変形を抑止する効果が十分に得られないためである
。また酸素指数を２７以上と限定したのは、この値未満
であると、難燃性が不十分で、火炎時の延焼防止が期待
てきないためである。The reinforced resin layer 4 has a temperature of 50% at 60°C.
The modulus is I. A thermoplastic resin with an oxygen index of 27 or more and an oxygen index of 27 or more is used,
Specifically, for example, flame-retardant polyethylene terephthalate (flame-retardant PBT) Toughpet N 2100 (manufactured by Mitsubishi Rayon Co., Ltd.), flame-retardant polyethylene terephthalate (flame-retardant PE
T ), flame-retardant nylon l2, polyetheretherketone (PEEK) Victrix 380G (manufactured by Mitsui Petrochemical Co., Ltd.), polyvinylidene fluoride (PV DF)
Examples include Kynar #460 (manufactured by Nippon Gogo Rubber Co., Ltd.) and polyamide elastomer Diamid PAE E62 (manufactured by Daicel Huels). Among them, PEEK in particular has a high 50% modulus and a high oxygen index.
is preferably used. Here, the 50% modulus at a temperature of 60°C is I. The reason why it is limited to O kgf/m or more is because if it is less than this value, the elastic modulus and strength of the reinforced resin layer 4 will be insufficient, and the effect of suppressing deformation when gripping the cleat will not be sufficiently achieved. It is. The reason why the oxygen index is limited to 27 or more is because if it is less than this value, the flame retardance will be insufficient and the prevention of fire spread in the event of a flame cannot be expected.
このような熱可塑性樹脂が上記シース３上に厚さ０．５
ｚｘ以上に被覆されて強化樹脂層４が形成さる。厚さ０
．５ｉｍ未満であると、強化樹脂層４として電気ケーブ
ルの強度および難燃性を高める効果を十分に発揮できず
好ましくない。Such a thermoplastic resin is coated on the sheath 3 to a thickness of 0.5 mm.
The reinforcing resin layer 4 is formed by covering zx or more. Thickness 0
．． If it is less than 5 mm, the reinforcing resin layer 4 cannot sufficiently exhibit the effect of increasing the strength and flame retardance of the electric cable, which is not preferable.
このような電気ケーブルを製造するに際しては、まず導
体ｌの外周」二に押出し被覆法などによって順次絶縁体
２、シース３を被覆し、次いでシース３の外周上に上記
熱可塑性樹脂を押出被覆法などにより被覆して強化樹脂
層４を形威する。When manufacturing such an electric cable, first the insulator 2 and the sheath 3 are coated on the outer periphery of the conductor 1 by an extrusion coating method or the like, and then the above-mentioned thermoplastic resin is coated on the outer periphery of the sheath 3 by an extrusion coating method. The reinforcing resin layer 4 is formed by covering the resin layer with, for example,
このような強化樹脂層４を有してなる電気ケーブルにお
いては、電気ケーブルの最外層の弾性率が増すので、た
とえクリート把持時の加圧条件下（最大加圧力１ ０
０ ｋ９／ ｃｉ”）においてもシースの変形が抑止さ
れ、長期間安定にその締付力を保持することができ、電
気的、機械的に優れた特性を維持することができる。ま
たこの強化樹脂層４は高い難燃性を有しているので、こ
の電気ケーブルは高い難燃性を発揮し、洞道内等への設
置に好適なものとなる。In an electric cable having such a reinforced resin layer 4, the elastic modulus of the outermost layer of the electric cable increases, so even if the cleat is gripped under pressurized conditions (maximum pressurizing force 1 0
0 k9/ci”), deformation of the sheath is suppressed, the tightening force can be maintained stably for a long period of time, and excellent electrical and mechanical properties can be maintained. Since layer 4 has high flame retardancy, this electric cable exhibits high flame retardancy and is suitable for installation inside a tunnel or the like.
またここでは、単心の電気ケーブルについて述べたが、
複数の導体ｌ・・・を有する多心構造とすることもでき
る。例えば第２図に示したような３心構造を有する電気
ケーブルは、導体１の外周上にそれぞれ絶縁体２が被覆
されたものを３本撚り合わせ、この撚線をポリ塩化ビニ
ル、ポリエチレンなどからなるシース３内に挿入し、空
隙を介在物５などによって埋め、さらにその外周上に上
記強化樹脂層４を設けてなるものである。Also, although we talked about single-core electrical cables here,
A multi-core structure having a plurality of conductors l... can also be used. For example, an electric cable with a three-core structure as shown in Figure 2 is made by twisting three wires each coated with an insulator 2 on the outer periphery of a conductor 1, and making these strands made of polyvinyl chloride, polyethylene, etc. The reinforcing resin layer 4 is inserted into a sheath 3, the gap is filled with an inclusion 5, etc., and the reinforcing resin layer 4 is provided on the outer periphery.
以下、実施例を示してこの発明をさらに詳しく説明する
。Hereinafter, the present invention will be explained in more detail by showing examples.
［実施例］
２２ｋＶ，１ｘｌ５０■２の架橋ポリエチレン絶縁ケー
ブルのシース（厚さ２．５ｘＲ）上に、熱可塑性樹膓を
被覆して強化樹脂層を形威し、実施例の５
６
電気ケーブルを得た。熱可塑性樹脂には、第１表に示し
たものを使用した。[Example] A reinforcing resin layer was formed by covering the sheath (thickness 2.5xR) of a 22kV, 1xl50cm2 cross-linked polyethylene insulated cable with thermoplastic resin to form an electric cable in Example 5-6. Obtained. The thermoplastic resins shown in Table 1 were used.
こうして得られた電気ケーブルを面圧１００＆Ｉ？ｆ／
ｃ戸で温度６０℃で３０日間締付け、クリート把持時の
変形の有無を調へた。結果を第１表に示す。The electric cable obtained in this way has a surface pressure of 100 & I? f/
The cleat was tightened for 30 days at a temperature of 60°C, and the presence or absence of deformation when gripping the cleat was checked. The results are shown in Table 1.
（以下、余白）
第 １ 表
１） 最外層のモシ゛ユラス ： ６０℃、 ５０％７
８
第１表より明らかなように、実施例の電気ケーブルにお
いて、クリート把持時の変形が見られず、長期間の締付
けに対しても安定であることが示唆ざれた。また特に最
外層にＰＥＥＫ樹脂を用いた実施例３にあっては、最外
層のモジュラスが著しく高いうえに極めて高い難燃性を
示し、非常に性能の良い電気ケーブルであった。一方、
強化樹脂層を設けなかった比較例１，３．５および強化
樹脂層の厚みがこの発明の範囲に満たなかった比較例４
の電気ケーブルて（ｉ、クリ一ト把持時における変形が
認められ、長期間の締付けに対する安定性に欠けること
が判明した。また強化樹脂層に使用した熱可塑性樹脂の
酸素指数の小さかった比較例２の電気ケーブルでは、燃
焼時の安定性に欠ける不満があった。(Hereinafter, blank spaces) Table 1 Table 1) Mosilius of outermost layer: 60°C, 50%7 8 As is clear from Table 1, in the electrical cable of the example, no deformation was observed when the cleat was gripped, and the cable remained stable for a long period of time. It was suggested that it is stable even when tightened. Further, in particular, in Example 3 in which PEEK resin was used for the outermost layer, the outermost layer had an extremely high modulus and exhibited extremely high flame retardance, resulting in an electrical cable with extremely good performance. on the other hand,
Comparative Examples 1 and 3.5 in which no reinforcing resin layer was provided, and Comparative Example 4 in which the thickness of the reinforcing resin layer was less than the range of this invention.
It was found that the electric cable (i) was deformed when the clitoris was grasped, and it lacked stability for long-term tightening.Also, a comparative example in which the thermoplastic resin used for the reinforced resin layer had a low oxygen index There was a complaint that the electric cable No. 2 lacked stability during combustion.
［発明の効果］
以上説明したように、この発明の電気ケーブルは、温度
６０℃での５０％モジュラスがｌ．Ｏｋ９ｒ／ＩＲ１１
ｔ以上で、かつ酸素指数が２７以上の熱可塑性樹脂から
なる厚さ０．５Ｒｍ以上の強化樹脂層がケーブルの最外
層に設けられてなるものであるので、電気ケーブルの弾
性率が増し、たとえクリート把持時の加圧条件下におい
てもその変形が抑止され、長期間安定にその締付力を保
持することができ、電気的、機械的に優れた特性を維持
することができる。またこの強化樹脂層は高い難燃性を
有しているので、この電気ケーブルは高い難燃性を発揮
し、洞道内等への設置に好適なものとなる。[Effects of the Invention] As explained above, the electric cable of the present invention has a 50% modulus of l. Ok9r/IR11
Since the outermost layer of the cable is a reinforcing resin layer made of a thermoplastic resin with a temperature of t or more and an oxygen index of 27 or more and a thickness of 0.5 Rm or more, the elastic modulus of the electric cable increases and Even under pressurized conditions when gripping the cleat, its deformation is suppressed, the tightening force can be maintained stably for a long period of time, and excellent electrical and mechanical properties can be maintained. Furthermore, since this reinforced resin layer has high flame retardancy, this electric cable exhibits high flame retardancy and is suitable for installation inside a tunnel or the like.
第１図は、この発明の電気ケーブルの一例を示す断面図
であり、
第２図は、第１図の電気ケーブルとは異なる一例を示す
断面図である。
４・・・・・・強化樹脂層。FIG. 1 is a sectional view showing an example of the electric cable of the present invention, and FIG. 2 is a sectional view showing an example different from the electric cable of FIG. 1. 4...Reinforced resin layer.
Claims (1)
＾２以上で、かつ酸素指数が２７以上の熱可塑性樹脂か
らなる厚さ０．５ｍｍ以上の強化樹脂層がケーブルの最
外層に設けられていることを特徴とする電気ケーブル。50% modulus at 60℃ temperature is 1.0kgf/mm
An electric cable characterized in that a reinforcing resin layer with a thickness of 0.5 mm or more made of a thermoplastic resin having an oxygen index of ^2 or more and an oxygen index of 27 or more is provided on the outermost layer of the cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23661189A JPH0398212A (en) | 1989-09-12 | 1989-09-12 | Electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23661189A JPH0398212A (en) | 1989-09-12 | 1989-09-12 | Electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0398212A true JPH0398212A (en) | 1991-04-23 |
Family
ID=17003208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23661189A Pending JPH0398212A (en) | 1989-09-12 | 1989-09-12 | Electric cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0398212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7276664B2 (en) * | 1996-06-07 | 2007-10-02 | Belden Technologies, Inc. | Cable with dual layer jacket |
-
1989
- 1989-09-12 JP JP23661189A patent/JPH0398212A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7276664B2 (en) * | 1996-06-07 | 2007-10-02 | Belden Technologies, Inc. | Cable with dual layer jacket |
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