JPS6168809A - Flame resistant cable - Google Patents
Flame resistant cableInfo
- Publication number
- JPS6168809A JPS6168809A JP60197891A JP19789185A JPS6168809A JP S6168809 A JPS6168809 A JP S6168809A JP 60197891 A JP60197891 A JP 60197891A JP 19789185 A JP19789185 A JP 19789185A JP S6168809 A JPS6168809 A JP S6168809A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- retardant
- rubber
- insulated wire
- polyethylene
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は給配ｔや制御、計装あるいは通信用として使
用される難燃性に浸れたケーブルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a flame-retardant cable used for distribution, control, instrumentation or communication purposes.
従来一般の電線ケーブルの絶縁体おるいは外波用のシー
スとしては、ホリエチレ／、架橋ポリエチレン、ポリ塩
化ビニル等の合成樹脂やＢＰゴム、クロロプレンゴム、
ブチルゴムあるいはクロルスルホ／化ポリエチレン等の
合成ゴム材料が主として使用されている。これらの材料
の内、ポリエチレンや架橋ポリエチレン、ＦＸｐゴム、
ブチルゴム等は比較的燃焼し易く、その他のクロロプレ
ンゴムやポリ塩化ビニル等は難燃性であることが知られ
ている。後者のクロロプレンゴムやボＩ［化ビニルのみ
によって絶縁体や外部シースを構成した電線ケーブルで
は耐燃性がきわめて高いが、実際には電線ケーブルの使
用目的や電気的特性あるいは価格等の観点から難燃性材
料と比較的燃焼し易い材料とを組合わせて使用すること
が多い。例えば高圧−カケ−プルでは、導体上に平溝電
層と架橋ポリエチレン絶縁体層とが順次形成され、その
上に外部溝Ｘ層としてのカーボンテープが１ね巻きされ
、さらに銅テープとカーボン紙が順次重ね巻きされ、こ
のようにして作られた線心が複数本撚り合された後ジュ
ート等の介在物を介してポリ磁化ビニルの外部シースが
形成されている。Conventional insulators or external wave sheaths for general electric wire cables have been made of synthetic resins such as polyethylene, cross-linked polyethylene, polyvinyl chloride, BP rubber, chloroprene rubber,
Synthetic rubber materials such as butyl rubber or chlorosulfo/polyethylene are mainly used. Among these materials, polyethylene, crosslinked polyethylene, FXp rubber,
It is known that butyl rubber and the like are relatively easily combustible, while other materials such as chloroprene rubber and polyvinyl chloride are flame retardant. The latter, electric wire cables whose insulators and outer sheaths are made only of chloroprene rubber or polyvinyl chloride, have extremely high flame resistance, but in reality, flame retardancy is required due to the purpose of use, electrical characteristics, price, etc. of the electric wire cables. A combination of a flammable material and a relatively combustible material is often used. For example, in a high-voltage cable, a flat groove electrical layer and a cross-linked polyethylene insulating layer are sequentially formed on the conductor, and one turn of carbon tape is wound thereon as an external groove X layer, and then copper tape and carbon paper are sequentially wound in layers, and a plurality of wire cores made in this way are twisted together to form an outer sheath of polymagnetic vinyl with an intervening material such as jute interposed therebetween.
上述のように架橋ポリエチレンやポリエチレンが絶縁体
に使用されているのは、架橋ポリエチレン等か絶縁体と
しての電気的特性に愛れているためであり、高圧電カケ
−プルの他、通信用、計装用、あるいは制御用のケーブ
ルにも広く使用されている。この場合外部シースとして
はボ＋）Ｈ化ビニル等の難燃性材料を使用するのが通常
であるが、このようにシースに難燃性材料を用いたもの
でも、内部の絶縁体が比較的燃焼し易ければ実際には顕
著な耐燃性を得ることができない。As mentioned above, cross-linked polyethylene and polyethylene are used as insulators because they are popular for their electrical properties as insulators, and are used in high-voltage electrical cables, communications, It is also widely used for instrumentation and control cables. In this case, it is normal to use a flame-retardant material such as vinyl hydride for the outer sheath, but even if the sheath is made of flame-retardant material, the inner insulator is relatively thin. If it is easily combustible, no significant flame resistance can actually be obtained.
すなわち、難燃性を評価するための実用的な災験万伝と
して、米国において原子力発電所用１Ｅ級冠気機器、グ
ープル等の品質認定試験規格１ＫＫ−３８６に制定され
た垂直トレイ燃焼試験と、この垂直トレイ試験のトレイ
にダクトを附加して垂直トレイ燃焼試験よりも苛酷な条
件で試験するダクト付垂直トレイ燃焼試験とが知られて
おり、絶縁体とシースとの両者を難燃性のポリ塩化ビニ
ルで碑放した′Ｉｊ１線では両試験に共に耐え得るが、
絶縁体として比較的燃焼し易いポリエチレンを用いると
共にシースとして難燃性のポリ塩化ビニルを使用した電
線では前者の垂直トレイ燃焼試験に耐えても扱者のダク
ト付垂直トレイ試験には耐え得ないものがほとんどであ
る。In other words, the vertical tray combustion test established in the United States as a quality certification test standard 1KK-386 for 1E class crown air equipment for nuclear power plants, Google, etc., as a practical disaster experience for evaluating flame retardancy. This vertical tray test is known as the ducted vertical tray combustion test, in which a duct is added to the tray and the test is conducted under more severe conditions than the vertical tray combustion test. The 'Ij1 wire exposed with vinyl chloride can withstand both tests, but
Wires that use relatively combustible polyethylene as an insulator and flame-retardant polyvinyl chloride as a sheath may withstand the former vertical tray combustion test, but cannot withstand the operator's ducted vertical tray test. Most of them are.
このように外部保護用のシースに難燃性材料を用いても
絶縁体が比較的燃焼し易い材料で作られているｔ線テー
ブルの耐燃性が劣る原因についてこの発明の発明者が研
究を電ねたところ、次のような知見が得られた。すなわ
ち、外部シースとして難燃性のポリ塩化ビニル等を用い
たものであっても、内部の絶縁体としてポリエチレンや
架倫ポリエチレ／等の比較的燃焼し易い可塑性材料を用
いたｔ線テーブルにあっては、外部からの加熱によって
内部の絶縁材料が溶−すると共にその一部が気化して流
出するか、或いはその圧力により外部シースが膨張して
破裂に至り、この破裂部分から前記絶縁材料の溶Ｘ物や
気化ガスが流出して溶融物や気化ガスに着火し、さらに
着火後には前記溶融物が火玉となって連続的に滴流し、
このため′ＲＬＩｉｌｊ！ケーブルを延焼さ虻てしまう
ことが判明した。The inventor of this invention has conducted research into the cause of the inferior flame resistance of T-ray tables whose insulators are made of materials that are relatively easily combustible even when flame-retardant materials are used for the external protective sheath. As a result, the following findings were obtained. In other words, even if the outer sheath is made of flame-retardant polyvinyl chloride, the inner insulator is made of a relatively combustible plastic material such as polyethylene or cross-linked polyethylene. In this case, the internal insulating material melts due to external heating and a part of it vaporizes and flows out, or the external sheath expands and ruptures due to the pressure, and the insulating material is released from the ruptured part. The molten X material and vaporized gas flow out and ignite the molten material and vaporized gas, and furthermore, after ignition, the molten material becomes a fireball and drips continuously,
For this reason, 'RLIilj! It turned out that the cables were exposed to fire and were attacked by mosquitoes.
上述のような事態が生じるのは、一般に外部シースがい
わゆる外部保龜被覆でおって耐衝撃性、耐岸耗性、耐朕
性等、もっばら内部を外側からの圧力や＠撃から保護す
るためのものでおり、内部からの気化ガスや溶融物の流
出や内部からの圧力に対してはまったく考慮されていな
いからでおる。The above-mentioned situation occurs because the outer sheath is generally covered with a so-called outer protection coating, which protects the interior from external pressure and impact, such as impact resistance, shore abrasion resistance, and scratch resistance. This is because no consideration is given to the outflow of vaporized gas or molten material from the inside, or the pressure from the inside.
また、ケーブル内の介在物についても十分な難燃化が計
られていないので、絶縁体と同時に燃焼することとなり
、上記塊成を促すことにもなっていた。In addition, inclusions in the cable are not sufficiently flame-retardant, so they burn at the same time as the insulator, promoting agglomeration.
この発明は以上のような背景からなされたものであり、
導体を被覆する絶縁体としてポリエチレン等の比較的燃
焼し易い材料が使用された複数の絶縁線心を難燃ゴム系
材料からなる紐状体と撚り合せ、この上ＫＷ＆燃性のゴ
ム系材料からなる保護板ｄ層を設け、さらに外部シース
を設け、加熱時に絶縁体の溶融物や気化ガスが外部へ流
出しないようにして耐熱性を向上さぜたものである。This invention was made against the above background,
A plurality of insulated wire cores made of a relatively easily combustible material such as polyethylene are used as the insulator to cover the conductor, and are twisted together with a string-like body made of a flame-retardant rubber material. A protective plate d layer is provided, and an outer sheath is further provided to prevent melted insulators and vaporized gas from flowing outside during heating, thereby improving heat resistance.
以下、この発明をより具体的に説明する。 This invention will be explained in more detail below.
図面は、この発明の離燃性ケーブルの一例を示すもので
、図中符号１は絶縁線心でめるっこの絶ａｍ心１は、導
体２上にポリエチレンなどの比較的燃焼し易い材料から
なる絶縁体層３を被租してなるものである。この絶縁線
心１は、その複数本が介在物である複数の紐状体４・・
・と撚り合ぜられている。この紐状体４は、クロロプレ
ンゴム、シリコーンゴム、クロルスルホン化ポリエチレ
／などのそれ自体で難燃性を有する難燃性ゴム系材料や
天然ゴム、ＥＰゴム、ブチルゴムなどのゴム系材料に難
燃化剤１例えば水酸化アルミニウムやハロゲン系難燃剤
と三２化アンチモン等を配合して難燃化した難燃化ゴム
系材料などの好ましくは酸素指′ｅ、３ｃ１以上の難燃
ゴム系材料からなる紐状の長尺体でおる。The drawing shows an example of a combustible cable according to the present invention, and the reference numeral 1 in the drawing is an insulated wire core, and the insulating core 1 is made of a relatively easily combustible material such as polyethylene on the conductor 2. It is formed by covering an insulating layer 3. This insulated wire core 1 includes a plurality of string-like bodies 4, each of which is an inclusion.
・It is twisted together. This string-like body 4 is made of flame-retardant rubber materials that are flame-retardant in themselves, such as chloroprene rubber, silicone rubber, and chlorosulfonated polyethylene, and rubber-based materials such as natural rubber, EP rubber, and butyl rubber. Agent 1 From a flame-retardant rubber-based material, preferably a flame-retardant rubber-based material with an oxygen index of 3c1 or higher, such as a flame-retardant rubber-based material made by blending aluminum hydroxide, a halogen-based flame retardant, and antimony tri2ide, etc. It has a long string-like body.
この紐状体４は、図面に示した例のように絶縁線心１・
・・の周囲に細径のものを多数撚り合せてもよく、ある
いは太径のものを中心としてこれに細径の絶縁線心１を
複数本を撚り合一てもよい。This string-like body 4 is composed of an insulated wire core 1 and a wire core 1 as shown in the drawing.
A large number of small-diameter insulated wire cores 1 may be twisted together around the . . . , or a plurality of small-diameter insulated wire cores 1 may be twisted together around a large-diameter wire core.
そして、この絶縁線心１・・・と紐状体４・・・との撚
り合ぜ体の外周には、保禮被覆層５が設けられている。A protection coating layer 5 is provided on the outer periphery of the twisted body of the insulated wire cores 1 and the string-like bodies 4.
この保護被覆層５は、先の紐状体４を形成する難燃性ゴ
ムと同一の材料からなるものである。保護板）＆層５の
形成方法としては、前述の撚り合せ体上に難燃ゴム系材
料を充実状もしくはパイプ状に押出被覆する方法や、難
燃ゴム系材料からなるテープを撚り合を体に巻き付ける
方法などかめる。保護被覆層５の厚みは、そのケーブル
の使用目的や径等によって異なるが、加熱した除に絶縁
体層２の溶融また気化による内圧によって膨張変形もし
くは破裂しない程度の強度が得られる厚みとすれば良く
、通常は数ｎの厚さあれば充分である。なお、紐状体４
・・・と保護被覆層５を構成する離燃ゴム系材料は加硫
、未加硫のいずれでもよい。This protective coating layer 5 is made of the same material as the flame-retardant rubber forming the string-like body 4 described above. The protective plate) & layer 5 can be formed by extruding a flame-retardant rubber material onto the above-mentioned twisted body in a solid or pipe shape, or by twisting a tape made of a flame-retardant rubber material. Learn how to wrap it around. The thickness of the protective coating layer 5 varies depending on the purpose of use and diameter of the cable, but it should be thick enough to ensure that it does not expand or deform or burst due to internal pressure caused by melting or vaporization of the insulating layer 2 when heated. Usually, a thickness of several nanometers is sufficient. In addition, the string-like body 4
The flame-retardant rubber material constituting the protective coating layer 5 may be either vulcanized or unvulcanized.
この保鏝被ａ層５の外周にはポリ塩化ビニル樹脂などの
難力と性材料からなる外部シース６が形成されている。An outer sheath 6 made of a tough and durable material such as polyvinyl chloride resin is formed around the outer periphery of the protective a-layer 5.
外部シース６は従来と同様の押出被＆ＴＫどの方法によ
って形成される。The outer sheath 6 is formed by conventional extrusion & TK methods.
なお、ケーブルの機能上、絶縁線心１に平溝電層が設け
られたり、保護被覆層５上に金属遮蔽テープやセパレー
トテープなどが適宜設けられた構成としてもよい。Note that, in terms of the function of the cable, a flat groove conductive layer may be provided on the insulated wire core 1, or a metal shielding tape, a separate tape, etc. may be provided on the protective coating layer 5 as appropriate.
このような難燃性ケーブルにおっては、絶縁線心１の絶
縁体層６か加熱され、溶融もしくは気化しはじめる際紐
状体４が難燃ゴム系材料からなるため、ｆ？ｌ融、気化
しにく（、絶縁体層３の溶融もしくは気化を：Ｍ延ぜし
め、難燃性を高める。さらに、難燃ゴム系材料からなる
保薩被ａ層５が絶縁体Ｍ６の溶融物や気化ガスの外部へ
の流出を効果的に防止し、溶融物や気化ガスへの着火が
防止され、高い難燃効果を発揮する。In such a flame-retardant cable, when the insulator layer 6 of the insulated wire core 1 is heated and begins to melt or vaporize, the string-like body 4 is made of a flame-retardant rubber material, so f? The insulator layer 3 is resistant to melting and vaporization (M) and the insulator layer 3 is prevented from melting or vaporizing, thereby improving flame retardancy. Effectively prevents molten material and vaporized gas from leaking to the outside, prevents ignition of molten material and vaporized gas, and exhibits a high flame retardant effect.
以下実施例を示して作用効果を明確にする。 Examples will be shown below to clarify the effects.
（実施例１）
この実施例は、計装用のポリエチレン絶縁・ポリ塩化ビ
ニルシースの１０心ケープ／Ｉ／（導体の公称断面積０
．５ ｍＡ ）に適用したものであり、導体上にポリエ
チレン絶縁体層を形成して絶縁線心を作り、難燃性ゴム
系材料であるクロロブレンゴムのｍ（外径的５．）を中
心として１０本の前記絶縁線心を撚り合わせ、その上に
同じく難燃性ゴム系材料”Ｃ”６ろクロロプレンゴムを
１．５關厚に未加硫のまま押出被覆して保護被覆層を形
成した。さらにその上にセパレータテープ、シールドテ
ープおよびセパレータテープを順次量ね巻きし、ポリ塩
化ビニルの外部シースを押出板極した。(Example 1) This example is a 10-core cape/I/(nominal cross-sectional area of the conductor with 0
．． 5 mA), a polyethylene insulating layer is formed on the conductor to create an insulated wire core, and the wire core is made of chloroprene rubber, which is a flame-retardant rubber material, and centered around m (5 mA in terms of outer diameter). Ten of the insulated wire cores were twisted together, and a protective coating layer was formed by extrusion coating the same flame-retardant rubber material "C" 6-filament chloroprene rubber to a thickness of 1.5 mm in an unvulcanized state. . Furthermore, a separator tape, a shield tape, and a separator tape were sequentially wound thereon, and the outer sheath of polyvinyl chloride was formed into an extruded plate.
（実施例２）
この実施例は、実施例１と同様に計装用ポリエチレン絶
縁・ポリ塩化ビニルシースの１０心ケーブル（導体の公
称断面積０．５ ｍｊ ）に適用したものでるり、導体
上にポリエチレン絶縁体層を形成して絶縁線心を作り、
難燃性ゴム系材料である加硫したシリコンゴムの紐を中
心として１０本の前記絶縁線心を撚り合わせ、その上に
同じく難燃性ゴム系材料である常温加硫型のシリコンゴ
ムを１，５闘厚に未加硫のまま押出被覆して保護被覆層
を形成した。この上にセパレータテープ、シールドテー
プ、セパレートテープン順次重ね巻きし、さらにポリ塩
化ビニ７＋、の外部シースを押出被接した。(Example 2) Similar to Example 1, this example was applied to a 10-core cable with polyethylene insulation and polyvinyl chloride sheath for instrumentation (nominal cross-sectional area of the conductor: 0.5 mj). Form an insulator layer to make an insulated wire core,
Ten insulated wire cores are twisted around a string of vulcanized silicone rubber, which is a flame-retardant rubber-based material, and on top of that, one piece of room-temperature vulcanized silicone rubber, which is also a flame-retardant rubber-based material, is twisted. A protective coating layer was formed by extrusion coating in an unvulcanized state to a thickness of 5 mm. A separator tape, a shield tape, and a separate tape were wound on top of this in order, and then an outer sheath made of polyvinyl chloride 7+ was extruded and attached.
以上の各実施例の電線ケーブルを前記ダクト付垂直トレ
イ燃焼試験（′″ｆ′なわち丁Ｆ！ＢＥ ３８５の垂直
トレイ区数におけるトレイにダクトを付加して燃焼条件
を苛酷にしたもの）によって試験したところ、２０分間
の加熱で全焼しないことが判明したり
〔発明の効果〕
以上説明したように、この発明の難燃性ケーブルは、複
数の絶縁線心を難燃ゴム系材料からなる紐状体と撚り合
？、この外周に難燃ゴム系材料からなる保護被覆層を設
け；この外方に外部シースを設けたものでろろので、加
熱時に絶縁線心の絶縁体層の溶融物や気化ガスが外部へ
流出して着火したり着火後に延焼することが防止され、
かつ電気的、機械的特性も向上し、従来のこの釉のケー
ブルと比較し、格段に難燃性が向心する。The electric wire cables of each of the above examples were subjected to the ducted vertical tray combustion test ('''f', that is, a duct was added to the tray in the vertical tray section number of D! BE 385 to make the combustion conditions more severe). As a result of testing, it was found that heating for 20 minutes did not cause a complete burnout. [Effects of the Invention] As explained above, the flame-retardant cable of the present invention has a plurality of insulated wire cores made of a string made of a flame-retardant rubber material. A protective coating layer made of a flame-retardant rubber material is provided on the outer periphery of the twisted body; an outer sheath is provided on the outside of this layer, so that when heated, the melted material of the insulator layer of the insulated wire core This prevents vaporized gas from leaking outside and igniting, or from spreading fire after ignition.
It also has improved electrical and mechanical properties, and is significantly more flame retardant than conventional glazed cables.
図面はこの発明の難燃性ケーブルの一例を示す概略断面
図でおる。
１・・・・・・絶縁線心、２・・・・・・導体、３・・
・・・・絶縁体層、４・・・・・・紐状体、５・・・・
・・保Ｉ被覆層、６・・・・・・外部シ−ス。The drawing is a schematic cross-sectional view showing an example of the flame-retardant cable of the present invention. 1...Insulated wire core, 2...Conductor, 3...
... Insulator layer, 4 ... String-like body, 5 ...
...I protection coating layer, 6...Outer sheath.
Claims (1)
合せ、この外側に難燃ゴム系材料からなる保護被覆層を
設け、この外方に外部シースを設けたことを特徴とする
難燃性ケーブル。A plurality of insulated wire cores are twisted together with a string-like body made of a flame-retardant rubber material, a protective coating layer made of a flame-retardant rubber material is provided on the outside of this, and an external sheath is provided on the outside of this. Flame retardant cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60197891A JPS6168809A (en) | 1985-09-07 | 1985-09-07 | Flame resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60197891A JPS6168809A (en) | 1985-09-07 | 1985-09-07 | Flame resistant cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6168809A true JPS6168809A (en) | 1986-04-09 |
Family
ID=16382008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60197891A Pending JPS6168809A (en) | 1985-09-07 | 1985-09-07 | Flame resistant cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007142080A1 (en) * | 2006-06-07 | 2007-12-13 | Fujita Corporation | Obstacle detector of electric shutter and electric shutter equipped with obstacle detector |
-
1985
- 1985-09-07 JP JP60197891A patent/JPS6168809A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007142080A1 (en) * | 2006-06-07 | 2007-12-13 | Fujita Corporation | Obstacle detector of electric shutter and electric shutter equipped with obstacle detector |
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