JPH0462720A - Flame retardant coaxial cable - Google Patents
Flame retardant coaxial cableInfo
- Publication number
- JPH0462720A JPH0462720A JP2174048A JP17404890A JPH0462720A JP H0462720 A JPH0462720 A JP H0462720A JP 2174048 A JP2174048 A JP 2174048A JP 17404890 A JP17404890 A JP 17404890A JP H0462720 A JPH0462720 A JP H0462720A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- coaxial cable
- halogen
- insulator
- flame retardant
- 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
- 239000003063 flame retardant Substances 0.000 title claims description 39
- 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 title claims description 35
- 239000012212 insulator Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 17
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 16
- 230000008018 melting Effects 0.000 claims abstract description 16
- 150000002367 halogens Chemical class 0.000 claims abstract description 15
- 229920000098 polyolefin Polymers 0.000 claims abstract description 15
- -1 Polyethylene Polymers 0.000 abstract description 10
- 239000004698 Polyethylene Substances 0.000 abstract description 10
- 229920000573 polyethylene Polymers 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- JKABQGPYSRNZDY-UHFFFAOYSA-N ClC1(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C1(Cl)Cl Chemical compound ClC1(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C(Cl)(Cl)C1(Cl)Cl JKABQGPYSRNZDY-UHFFFAOYSA-N 0.000 abstract description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 229910000077 silane Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 6
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 208000000474 Poliomyelitis Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- CAYGQBVSOZLICD-UHFFFAOYSA-N hexabromobenzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1Br CAYGQBVSOZLICD-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、同軸ケーブルの改良に関し、特に火災及び−
時的な高温状、態に耐え得る難燃性同軸クープルに関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to improvements in coaxial cables, and particularly to prevention of fire and -
This invention relates to a flame-retardant coaxial couple that can withstand occasional high-temperature conditions.
（従来の技術）
従来から電気特性及び可撓性に優れ高周波機器の内部配
線及び接続に広く使用されている同軸クープルとして、
ＪＩＳ Ｃ３５０１やＭＩＬ規格に規定されるポリエ
チレン絶縁編組形の高周波同軸ケーブルかある。近年こ
れらの同軸ケーブルは、原子カプラント等の特殊設備で
使用される際に、火災及び−時的な高温状態に耐え得る
高い難燃性を有することが要求されている。(Prior art) As a coaxial couple, which has excellent electrical properties and flexibility, has been widely used for internal wiring and connections of high frequency equipment.
There is a polyethylene insulated braided high frequency coaxial cable specified by JIS C3501 and MIL standards. In recent years, these coaxial cables are required to have high flame retardancy to withstand fire and occasional high temperature conditions when used in special equipment such as nuclear couplants.
しかしながら、ポリエチレン絶縁体に難燃剤等の添加剤
を添加すると、−ｉにその誘電率εと誘電圧接しａｎδ
が増大して、同軸ケーブルの減衰量と静電容量か増大し
、併せて特性インピーダンスの不適合か生じて、電気特
性が著しく低下してしまうという問題を生じる。そこで
前述のポリエチレン絶縁編組形の高周波同軸ケーブルに
難燃性を付与するには、外部導体外周に耐火テープ層を
設けたり、外部シースのみを難燃ゴムに代えたりするこ
とか行われている。しかしながら、耐火テープ層を設け
るとケーブル本来の優れた可撓性が低下するとともに製
造工程の増加、複雑化といった問題か生じ、また外部シ
ースのみを難燃化しても内外導体間の絶縁体の溶融を防
ぎきれず、ケーブルとしての難燃性は未だ不充分である
という問題があった。However, when additives such as flame retardants are added to polyethylene insulators, -i is in contact with its dielectric constant ε and dielectric voltage anδ
As a result, the attenuation and capacitance of the coaxial cable increase, resulting in a characteristic impedance mismatch, resulting in a significant deterioration of electrical characteristics. Therefore, in order to impart flame retardancy to the above-mentioned polyethylene insulated braided high frequency coaxial cable, methods are used such as providing a fireproof tape layer around the outer periphery of the outer conductor or replacing only the outer sheath with flame retardant rubber. However, providing a fire-resistant tape layer reduces the cable's original excellent flexibility, increases the number of manufacturing processes, and makes it more complicated.Also, even if only the outer sheath is flame-retardant, the insulation between the inner and outer conductors may melt. There was a problem in that the flame retardancy as a cable was still insufficient.
まな、難燃性を有する同軸ケーブルとして、内外導体間
の絶縁体をポリエチレンに代えてパー７０ロアルコキシ
衝脂（ＰＦＡ）や四フッ化エチレン六フッ化プロピレン
共重合体（ＦＥＰ）等のフッ素樹脂を使用したものもあ
るか、ポリエチレン絶縁体に比べて可撓性か悪く、さら
にコストか高いという欠点を有している。Furthermore, in order to create a flame-retardant coaxial cable, the insulator between the inner and outer conductors is replaced with polyethylene using a fluororesin such as par-70 loalkoxy resin (PFA) or tetrafluoroethylene hexafluoropropylene copolymer (FEP). However, compared to polyethylene insulators, they have the disadvantages of being less flexible and more expensive.
（発明か解決しようとするｍＭ）
以上の点に鑑みて、本発明は、絶縁体にポリオレフィン
を使用することによる同軸ケーブルの良好な可撓性と電
気特性、即ち静電容量、減衰量及び特性インピーダンス
とを損なうこと無く、その難燃性を大幅に向上し、しか
も比較的安価で、製造工程の複雑化を生じない難燃性同
軸ケーブルを提供することを目的とする。(mM to be solved by the invention) In view of the above points, the present invention provides good flexibility and electrical properties of a coaxial cable by using polyolefin as an insulator, that is, capacitance, attenuation amount, and characteristics. The purpose of the present invention is to provide a flame-retardant coaxial cable whose flame retardance is significantly improved without impairing impedance, which is relatively inexpensive, and which does not complicate the manufacturing process.
（課題を解決するための手段）
かかる課題に基づき検討した結果、特定のハロゲン系難
燃剤を選択して用いれば、ポリオレフィン絶縁体の本来
有する良好な電気特性を損なうこと無く、難燃性を大幅
に向上させることを見出なし、本発明に至った。(Means for solving the problem) As a result of studies based on the above problem, we found that if a specific halogen flame retardant is selected and used, the flame retardance can be significantly improved without impairing the good electrical properties inherent to polyolefin insulators. The present invention was based on this discovery.
本発明は即ち、内部導体の上にポリオレフィン絶縁体、
外部導体、及びシースを順に設けてなる同軸ケーブルに
おいて、前記ポリオレフィン絶縁体は融点３００°Ｃ以
上のハロゲン系難燃剤を１０〜４０ＰＨＲ含有してなる
ことを特徴とする難燃性同軸ケーブルに関する。The present invention includes a polyolefin insulator on the inner conductor;
The present invention relates to a flame-retardant coaxial cable comprising an outer conductor and a sheath in this order, wherein the polyolefin insulator contains 10 to 40 PHR of a halogen-based flame retardant having a melting point of 300°C or higher.
以下、本発明の難燃性同軸ケーブル３図面にしたかって
説明する。図面は本発明の難燃性同軸ケーブルの一実施
例を示す断面図である。内部導体１の上に難燃剤含有ポ
リオレフィン絶縁体２か設けられ、さらに外部導体３と
シース４か順次被覆されている。Hereinafter, three drawings of the flame-retardant coaxial cable of the present invention will be explained. The drawing is a sectional view showing one embodiment of the flame-retardant coaxial cable of the present invention. A flame retardant-containing polyolefin insulator 2 is provided on the inner conductor 1, and further covered with an outer conductor 3 and a sheath 4 in sequence.
ここで、難燃剤含有ポリオレフィン絶縁体２のベース樹
脂は、可撓性及び上述の電気特性の面からポリエチレン
か最も好ましいが、この他シラン架橋ポリオレフィン等
も使用できる。そして、これらのポリオレフィンに融点
３００°Ｃ以上のハロゲン系難燃剤を配合する。このハ
ロゲン系難燃剤は、分子中に少なくとも１個のハロゲン
原子を含む難燃剤のうち、融点が３００℃以上のもので
ある。具体的には、例えばパークロロシクロデカン（Ｃ
１８Ｈ１２ＣＥ １２、融点３５０’Ｃ，Ｃ，ｆ）含有
率６５％）、テ′カブロムジフェニルエーテル（ＣＩ２
Ｂｒ１００ 、融点３０２°Ｃ，Ｂｒ含有率８３％）、
ヘキサブロモベンゼン（Ｃ６Ｂｒ６、融点３２０’Ｃ１
Ｂｒ含有率８７％）、エチレンビ、ステトラブロモフタ
ルマイトＣＣＩＪＨ１２Ｎ２ Ｂ ｒｓ 、 融点４４
５’Ｃ，Ｂｒ含有率６，６％）等があり、これらは単独
あるいは混合して使用できる。これらの融点３゜０℃以
上のハロゲン系難燃剤は、ベース樹脂に対して１０〜４
０ＰＨＲ配合する。配合量がこれより少ないと難燃性の
効果が小さく、またこれより多く配合すると難燃性は向
上するもののケーブルの静電容量が大きくなってしまう
ので好ましくない。また、この範囲内であっても融点３
００’Ｃ未満のハロゲン系Ｎ燃剤を併用すると減衰量及
び静電容量か増大してしまって好ましくない。Here, the base resin of the flame retardant-containing polyolefin insulator 2 is most preferably polyethylene in terms of flexibility and the above-mentioned electrical properties, but other materials such as silane-crosslinked polyolefin can also be used. Then, a halogen flame retardant having a melting point of 300°C or higher is blended with these polyolefins. This halogen-based flame retardant is a flame retardant having a melting point of 300° C. or more among flame retardants containing at least one halogen atom in its molecule. Specifically, for example, perchlorocyclodecane (C
18H12CE 12, melting point 350'C,C,f) content 65%), Te'cabrom diphenyl ether (CI2
Br100, melting point 302°C, Br content 83%),
Hexabromobenzene (C6Br6, melting point 320'C1
Br content 87%), ethylene bis, tetrabromophthalmite CCIJH12N2 B rs , melting point 44
5'C, Br content of 6.6%), etc., and these can be used alone or in combination. These halogen-based flame retardants with a melting point of 3°C or higher are 10-4% of the base resin.
Add 0PHR. If the amount is less than this, the flame retardant effect will be small, and if it is more than this, although the flame retardance will be improved, the capacitance of the cable will increase, which is not preferable. Moreover, even within this range, the melting point is 3.
If a halogen-based N fuel of less than 00'C is used in combination, the attenuation and capacitance will increase, which is not preferable.
外部導体３としては、通常使用される軟銅撚線ＭＩ組等
か、またシース４としては、ポリエチレンや塩化ビニル
樹脂をベース樹脂として、ハロゲン系あるいは非ハロゲ
ン系難燃剤を配合して難燃化したものが良好に使用でき
る。The outer conductor 3 is made of commonly used annealed copper stranded wire MI set, etc., and the sheath 4 is made of polyethylene or vinyl chloride resin as a base resin, and is made flame retardant by blending a halogen-based or non-halogen-based flame retardant. The item is in good usable condition.
（作用）
本発明の難燃性同軸ケーブルにおいては、難燃剤として
融点３００°Ｃ以上のハロゲン系難燃剤を所定量添加す
るので、ポリオレフィン絶縁体の有する良好な電気特性
を損なうこと無く、その難燃性を大幅に向上させること
かできる。非ハロゲン系難燃剤あるいは融点３００°Ｃ
以下のハロゲン系難燃剤を添加しても、ポリオレフィン
絶縁体の有する良好な電気特性を充分に保持することは
できない。また、本発明の難燃性同軸ケーブルは、従来
の同タイプの同軸ケーブルと、その構成やサイズの変更
を要しないので汎用のコネクタをそのまま適用すること
かできる。(Function) In the flame-retardant coaxial cable of the present invention, a predetermined amount of a halogen-based flame retardant with a melting point of 300°C or higher is added as a flame retardant. Flammability can be significantly improved. Non-halogen flame retardant or melting point 300°C
Even if the following halogen flame retardants are added, the good electrical properties of the polyolefin insulator cannot be sufficiently maintained. Further, since the flame-retardant coaxial cable of the present invention does not require any change in structure or size as the conventional coaxial cable of the same type, a general-purpose connector can be applied as is.
（実方次β勾） 本発明の実施例について説明する。(real square β gradient) Examples of the present invention will be described.
実施例１〜４
０．５８４＋Ｗの銅被覆鋼線を内部導体として、表に示
す配合の難燃架橋ポリエチしン絶縁体を外径３．７ｍｎ
＋となるように被覆し、その上に０． １６■錫メツキ
軟銅線の編組により外部導体を設け、シースとしてはテ
カブロムシ゛フェニルエーテルと：酸化アンチモンとを
ポリエチレンに配合して酸素指数を２７とし７ｆ：難燃
架橋ボワエチレンンースを厚さＯ２８朧に被覆し、てＭ
ＩＬ規格Ｒ０５９Ｂ 、、／ Ｌｌを基にして同軸ケー
ブルを製造した。この同軸ケーブルを用いて、静電容量
、減衰量、特性インピーダンス、及び難燃性（Ｉ ＥＥ
ＥｔＩｆＨ’３３８３垂直トレイ試験によるシースの最
大燃焼長さ）を測定した。結果を表に示す。なお、ＭＩ
Ｌ規格ＲＧ−５９Ｂ／Ｕの仕様は、静電容量（１ｋＨｚ
）が原準６６、３ （ｎＦ／Ｉａａ） 、減衰Ｘ （１
０Ｍ ５−５２）か３６ （ｄ Ｂ、／ｋｍ）以下、特
性インピータンス（１０ＭＨｚ）か７５±３（Ω）であ
り、各実施例はいずれの特性も満足する結果となった。Examples 1 to 4 A 0.584+W copper-coated steel wire was used as an internal conductor, and a flame-retardant cross-linked polyethylene insulator having the composition shown in the table was used as an outer diameter of 3.7 mm.
+ coating, and 0. 16 ■ An external conductor is provided by braiding tin-plated annealed copper wire, and the sheath is made of polyethylene mixed with tecabromium phenyl ether and antimony oxide to give an oxygen index of 27. coated with M
A coaxial cable was manufactured based on IL standard R059B,.../Ll. Using this coaxial cable, the capacitance, attenuation, characteristic impedance, and flame retardance (IEE
The maximum burn length of the sheath by EtIfH'3383 vertical tray test) was measured. The results are shown in the table. Furthermore, MI
The specifications of L standard RG-59B/U are capacitance (1kHz
) is the principle 66, 3 (nF/Iaa), attenuation X (1
The characteristic impedance (10 MHz) was 75±3 (Ω), and each example satisfied all the characteristics.
比較例１〜５
比較として絶縁体の構成が架橋ポリエチレンのみ（比較
例丁）、融点３００°Ｃ以上の難燃剤に３００°Ｃ未満
の難燃剤を併用した場合（比較例２）、融点３００°Ｃ
未満の難燃剤のみを添加した場合（比較例３）、難燃剤
の量か゛過剰の場合（比較例４）、逆に過少の場合（比
較例５）３のそれぞれについて、表に示す配合で絶縁体
を構成し、その他は実施Ｍ１と同様にして同軸クーフル
を製造し、同様に試験した。結果を表に示す。Comparative Examples 1 to 5 As a comparison, when the insulator was composed of only cross-linked polyethylene (Comparative Example 1), and when a flame retardant with a melting point of 300°C or higher was used in combination with a flame retardant below 300°C (Comparative Example 2), a flame retardant with a melting point of 300°C or higher was used. C
Insulation was performed using the compositions shown in the table for each of the following cases: when less than 30% of the flame retardant was added (Comparative Example 3), when the amount of flame retardant was too much (Comparative Example 4), and when the amount of flame retardant was too little (Comparative Example 5). A coaxial kuffle was manufactured in the same manner as in Example M1, and was tested in the same manner. The results are shown in the table.
（以下余白）
（発明の効果）
以上、本発明の難燃性同軸ケーブルは、ポリオしフィン
絶縁体のｉＦＬな電気特性を良好に保持しなから、難燃
性か大幅に向上しており、火災発生時にも高い安全性と
有している。(The following is a blank space) (Effects of the invention) As described above, the flame-retardant coaxial cable of the present invention maintains the iFL electrical characteristics of the polio fin insulator well, and has significantly improved flame retardancy. It has a high level of safety even in the event of a fire.
図面は本発明のＮ燃性同軸ケーブルの一実施例を示す断
面図である。
内部導体
難燃剤含有ポリオレフィン絶縁体
外部導体
シースThe drawing is a sectional view showing an embodiment of the N-flammable coaxial cable of the present invention. Inner conductor Flame retardant-containing polyolefin insulation Outer conductor sheath
Claims (1)
、及びシースを順に設けてなる同軸ケーブルにおいて、
前記ポリオレフィン絶縁体は融点３００℃以上のハロゲ
ン系難燃剤を１０〜４０ＰＨＲ含有してなることを特徴
とする難燃性同軸ケーブル。(1) In a coaxial cable in which a polyolefin insulator, an outer conductor, and a sheath are sequentially provided on an inner conductor,
A flame-retardant coaxial cable, wherein the polyolefin insulator contains 10 to 40 PHR of a halogen-based flame retardant having a melting point of 300° C. or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2174048A JPH0462720A (en) | 1990-06-29 | 1990-06-29 | Flame retardant coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2174048A JPH0462720A (en) | 1990-06-29 | 1990-06-29 | Flame retardant coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0462720A true JPH0462720A (en) | 1992-02-27 |
Family
ID=15971713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2174048A Pending JPH0462720A (en) | 1990-06-29 | 1990-06-29 | Flame retardant coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0462720A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2762438A1 (en) * | 1997-04-22 | 1998-10-23 | Alsthom Cge Alcatel | Communications cable for data and telecommunications optionally also carrying electrical power |
-
1990
- 1990-06-29 JP JP2174048A patent/JPH0462720A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2762438A1 (en) * | 1997-04-22 | 1998-10-23 | Alsthom Cge Alcatel | Communications cable for data and telecommunications optionally also carrying electrical power |
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