JPS639955Y2 - - Google Patents
Info
- Publication number
- JPS639955Y2 JPS639955Y2 JP1995183U JP1995183U JPS639955Y2 JP S639955 Y2 JPS639955 Y2 JP S639955Y2 JP 1995183 U JP1995183 U JP 1995183U JP 1995183 U JP1995183 U JP 1995183U JP S639955 Y2 JPS639955 Y2 JP S639955Y2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- tape
- retardant
- weight
- parts
- 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
Links
- 239000003063 flame retardant Substances 0.000 claims description 17
- 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 claims description 16
- 229910052736 halogen Inorganic materials 0.000 claims description 9
- 150000002367 halogens Chemical class 0.000 claims description 9
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 239000011241 protective layer Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 6
- 229910010272 inorganic material Inorganic materials 0.000 claims description 5
- 239000011147 inorganic material Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000012212 insulator Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000000452 restraining effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Description
(考案の技術分野)
本考案は、難燃ケーブルの改良に関するもので
ある。
(考案の技術的背景およびその問題点)
従来、ケーブルの難燃性を高める場合、ポリ塩
化ビニル、ポリクロロプレンなどの含ハロゲンポ
リマー及びポリオレフインなどに有機ハロゲン系
難燃剤と三酸化アンチモンを混合したものをシー
スとして用いている。しかし前記シースは燃焼時
に分解してハロゲン化水素ガスが発生して、人体
や機器に悪影響を及ぼすと云う問題があつた。そ
こで最近はハロゲンを含まない難燃性ケーブルの
実現化が望まれており、一般的にはポリオレフイ
ンに多量の水和アルミナを充填してシース材料と
する試みがなされているが、その場合次の様な問
題点が上げられる。
(1) 多量に充填すると機械的強度が低下する。
(2) 多量に充填すると電気的特性が低下する。
(吸湿もしやすくなり、高温多湿下での使用に
適さない。)
(3) 加工性、架橋特性が低下する。
(4) 添加量が少ないと難燃性が上がらない。
(考案の目的)
本考案は上記の状況に鑑み考案されたものであ
り、絶縁及びシース材料の物性を損なわずに難燃
性を向上できる難燃ケーブルを提供することを目
的としたものである。
(考案の概要)
本考案の難燃ケーブルは絶縁線心上に無機質を
主成分とするテープ層、ポリオレフイン100重量
部に対し金属酸化物の水和物100〜300重量部を添
加してなる保護層および無機質を主成分とするテ
ープ層を順次設け、さらにその外側にハロゲンを
含まない難燃性シース層を被覆したことにより前
記目的を達成している。
本考案に使用される絶縁体としてはポリエチレ
ン、架橋ポリエチレン等一般に使用されている絶
縁用ポリオレフインあるいは前記ポリオレフイン
に金属水和物を適当量バンバリーミキサーなどで
添加したものが使用される。又抑えテープとして
は炎にさらされても変形しない無機質を主成分と
するテープ例えばガラステープ、セラミツクテー
プ、銅テープなどが使用できる。さらに保護層
は、例えばエチレン・プロピレンゴム、エチレ
ン・酢酸ビニル共重合体などのポリオレフイン
100重量部に水和アルミナ、水酸化マグネシウム
などの金属水和物100〜300重量部を加え、バンバ
リ・ミキサーあるいはミキシング・ロールなどで
混合したものをテープ状にして巻き付けるかある
いは押出被覆して形成することができる。ここで
金属水和物の量を100〜300重量部と規定したの
は、100重量部より少ないと難燃性が不充分であ
り300重量部を越えると機械特性、押出加工性が
悪いためである。
又ハロゲンを含まない難燃性シースは、例えば
ポリエチレン、エチレン・プロピレン共重合体あ
るいはエチレン・酢酸ビニル共重合体などのポリ
オレフイン100重量部に対して金属水和物100重量
部以上を加えて少なくとも酸素指数が25以上とな
るような組成物が使用される。
(考案の実施例)
以下、本考案の難燃ケーブルの一実施例を図面
により説明する。
図は7ケ撚りケーブルの断面図を示し、各導体
1の外周には絶縁体2が被覆された後、絶縁体2
相互間に介在3を挿入して撚り合わされその外周
に内部抑えテープ4、保護層5、外部抑えテープ
4′、ノンハロゲン難燃シース6が順次設けられ
ている。
以上の構造のケーブルにおいて、公称断面積
2.0mm2の導体に絶縁体を0.8mmの被覆厚で被覆し、
これを介在とともに7ケ撚り合わせ、内部抑えテ
ープを用いた場合はガラステープをこの撚線外周
に巻回し、この外周に保護層を押出し被覆し、さ
らに外部抑えテープを用いた場合はガラステープ
を巻回し、さらにその外周にシースを押出し被覆
して所定の難燃ケーブルとした。これらの絶縁
体、抑えテープ、保護層、シースの組成を表に示
す。
次に、絶縁体、介在およびシースの任意の箇所
から、それぞれ5本の試験用サンプルをとり出
し、これらの酸素指数および機械強度を調べ、そ
の結果をあわせて、表に示した。さらに電線サン
プルの難燃試験を行なうが、ここでの難燃試験は
IE3std383VFTを採用しており、同試験では電線
サンプルを垂直状態に規定本数金属トレイに布設
し垂直に撚焼させ、そして電線サンプルが試験時
間(20分)中、もしくは、バーナ消火後トレイ上
部迄1.8m延焼しないことを合格の適否として判
定するようにしたものである。
(Technical Field of the Invention) The present invention relates to improvements in flame-retardant cables. (Technical background of the invention and its problems) Conventionally, when improving the flame retardance of cables, organic halogen flame retardants and antimony trioxide were mixed with halogen-containing polymers such as polyvinyl chloride and polychloroprene, and polyolefins. is used as a sheath. However, there is a problem in that the sheath decomposes during combustion and generates hydrogen halide gas, which has an adverse effect on the human body and equipment. Recently, there has been a desire to realize flame-retardant cables that do not contain halogens, and attempts have generally been made to fill polyolefin with a large amount of hydrated alumina as a sheath material. Various issues can be raised. (1) Mechanical strength decreases when filled in large quantities. (2) Electrical characteristics will deteriorate if filled in large quantities.
(It also absorbs moisture easily, making it unsuitable for use in high temperature and high humidity environments.) (3) Processability and crosslinking properties deteriorate. (4) If the amount added is small, flame retardancy will not improve. (Purpose of the invention) The present invention was devised in view of the above situation, and the purpose is to provide a flame-retardant cable that can improve flame retardancy without impairing the physical properties of the insulation and sheath material. . (Summary of the invention) The flame-retardant cable of the invention has a tape layer mainly composed of an inorganic material on an insulated wire core, and protection made by adding 100 to 300 parts by weight of metal oxide hydrate to 100 parts by weight of polyolefin. The above objective is achieved by sequentially providing a tape layer containing an inorganic material as a main component, and further coating the outside with a flame-retardant sheath layer that does not contain halogen. The insulator used in the present invention may be a commonly used insulating polyolefin such as polyethylene or crosslinked polyethylene, or a polyolefin prepared by adding an appropriate amount of a metal hydrate using a Banbury mixer or the like. Further, as the restraining tape, tapes mainly composed of inorganic materials that do not deform even when exposed to flame, such as glass tape, ceramic tape, copper tape, etc. can be used. Furthermore, the protective layer may be made of polyolefin such as ethylene/propylene rubber or ethylene/vinyl acetate copolymer.
Add 100 to 300 parts by weight of a metal hydrate such as hydrated alumina or magnesium hydroxide to 100 parts by weight, mix with a Banbury mixer or mixing roll, and wrap the mixture into a tape or extrusion coating. can do. The reason why the amount of metal hydrate was defined as 100 to 300 parts by weight is that if it is less than 100 parts by weight, the flame retardance will be insufficient, and if it exceeds 300 parts by weight, the mechanical properties and extrusion processability will be poor. be. In addition, a flame-retardant sheath that does not contain halogen can be obtained by adding at least 100 parts by weight of a metal hydrate to 100 parts by weight of a polyolefin such as polyethylene, ethylene/propylene copolymer, or ethylene/vinyl acetate copolymer. A composition with an index of 25 or higher is used. (Embodiment of the invention) Hereinafter, an embodiment of the flame-retardant cable of the invention will be described with reference to the drawings. The figure shows a cross-sectional view of a 7-strand cable, in which the outer periphery of each conductor 1 is coated with an insulator 2, and then the insulator 2
They are twisted together with an interposer 3 inserted between them, and an internal restraining tape 4, a protective layer 5, an external restraining tape 4', and a non-halogen flame-retardant sheath 6 are sequentially provided on the outer periphery thereof. For cables with the above structure, the nominal cross-sectional area
A 2.0mm 2 conductor is coated with an insulator with a coating thickness of 0.8mm,
Seven strands of these are twisted together with an intervening material, and when an internal restraining tape is used, a glass tape is wound around the outer periphery of the stranded wires, and a protective layer is extruded and coated on this outer periphery, and when an external restraining tape is used, a glass tape is wrapped around the strands. The cable was wound, and a sheath was extruded around the outer periphery of the cable to obtain a specified flame-retardant cable. The compositions of these insulators, tapes, protective layers, and sheaths are shown in the table. Next, five test samples were taken from arbitrary locations on the insulator, the intervening material, and the sheath, and their oxygen index and mechanical strength were examined, and the results are also shown in the table. Furthermore, a flame retardant test is performed on the wire sample, but the flame retardant test here is
IE 3 std383VFT is used, and in this test, a specified number of wire samples are laid vertically on a metal tray, twisted and fired vertically, and the wire samples are placed on the top of the tray during the test period (20 minutes) or after the burner is extinguished. Passing the test is determined by the fact that the fire does not spread up to 1.8m.
【表】【table】
【表】
(考案の効果)
このように本考案の難燃ケーブルは絶縁体とシ
ースの間に金属水和物を多充填した保護層を内外
の抑えテープでサンドイツチとした構造を有する
ことにより、難燃性が良好で且つ、絶縁・シース
の押出加工性も損なわれずさらにノンハロゲンタ
イプなので燃焼時にも人体や機器に悪影響をおよ
ぼすガスの発生のない利点を有している。[Table] (Effects of the invention) As described above, the flame-retardant cable of the invention has a structure in which a protective layer filled with a large amount of metal hydrate is sandwiched between the insulator and the sheath using inner and outer restraining tapes. It has good flame retardancy, does not impair the extrusion processability of insulation and sheathing, and is a non-halogen type, so it has the advantage of not generating gas that can adversely affect the human body or equipment when burned.
図は本考案に係る難燃ケーブルの断面図を示す
図である。
1…導体、2…絶縁体、3…介在、4,4′…
抑えテープ、5…保護層、6…ノンハロゲン難燃
シース。
The figure is a diagram showing a cross-sectional view of a flame-retardant cable according to the present invention. 1...conductor, 2...insulator, 3...intervening, 4,4'...
Pressure tape, 5...protective layer, 6...non-halogen flame retardant sheath.
Claims (1)
ポリオレフイン100重量部に対し金属酸化物の水
和物100〜300重量部を添加してなる保護層および
無機質を主成分とするテープ層を順次設け、さら
にその外側にハロゲンを含まない難燃性シース層
を被覆したことを特徴とする難燃ケーブル。 A tape layer mainly composed of inorganic material on the insulated wire core,
A protective layer made by adding 100 to 300 parts by weight of a metal oxide hydrate to 100 parts by weight of polyolefin and a tape layer mainly composed of an inorganic material are sequentially provided, and a flame-retardant sheath that does not contain halogen is provided on the outside. A flame-retardant cable characterized by being coated with a layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1995183U JPS59126417U (en) | 1983-02-14 | 1983-02-14 | flame retardant cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1995183U JPS59126417U (en) | 1983-02-14 | 1983-02-14 | flame retardant cable |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59126417U JPS59126417U (en) | 1984-08-25 |
JPS639955Y2 true JPS639955Y2 (en) | 1988-03-24 |
Family
ID=30151089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1995183U Granted JPS59126417U (en) | 1983-02-14 | 1983-02-14 | flame retardant cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59126417U (en) |
-
1983
- 1983-02-14 JP JP1995183U patent/JPS59126417U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS59126417U (en) | 1984-08-25 |
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