JPH0378910A - Flame retardant high foam cable - Google Patents
Flame retardant high foam cableInfo
- Publication number
- JPH0378910A JPH0378910A JP1216778A JP21677889A JPH0378910A JP H0378910 A JPH0378910 A JP H0378910A JP 1216778 A JP1216778 A JP 1216778A JP 21677889 A JP21677889 A JP 21677889A JP H0378910 A JPH0378910 A JP H0378910A
- Authority
- JP
- Japan
- Prior art keywords
- foaming
- foam layer
- sheath
- wire
- flame
- 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
- 239000006260 foam Substances 0.000 title claims abstract description 38
- 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 abstract description 16
- 239000003063 flame retardant Substances 0.000 title claims abstract description 16
- 238000005187 foaming Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000004088 foaming agent Substances 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims 1
- 229920001684 low density polyethylene Polymers 0.000 abstract description 4
- 239000004702 low-density polyethylene Substances 0.000 abstract description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000004604 Blowing Agent Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000004156 Azodicarbonamide Substances 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 2
- 235000019399 azodicarbonamide Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- UOYIYWCAYFTQLH-UHFFFAOYSA-N 3,7-dinitro-1,3,5,7-tetrazabicyclo[3.3.1]nonane Chemical compound C1N2CN([N+](=O)[O-])CN1CN([N+]([O-])=O)C2 UOYIYWCAYFTQLH-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000002666 chemical blowing agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 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〕
本発明は、主にコンピュータシステムの配線に使用する
難燃性高発泡電線に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flame-retardant highly foamed electric wire used mainly for wiring computer systems.
主にコンピュータシステムなどの配線に使用するケーブ
ルは、一般に第２図に示すように、絶縁性発泡電線１１
が編組シールド１２によって覆われ、さらにシース１３
で全体が被覆された構造が多い。Cables mainly used for wiring computer systems etc. are generally made of insulated foam wire 11 as shown in Figure 2.
is covered by a braided shield 12 and further covered by a sheath 13
Many structures are completely covered with.
ケーブルの発泡電線１１は、通常は銅などからなる心線
を絶縁性発泡層、シースの順に覆う三層構造が採られて
いる（第１図参照）、かかる発泡電線は、コンピュータ
システムの恒久的配線システムに使用する場合、通常は
難燃性に対して厳しい規格が設定されており、規格の合
格品でないと使用できない０例えば、ＵＬ規格のｖｗ−
１の規格に合格する難燃性発泡電線では、第１図に示し
た発泡層２を分厚くすることで難燃性を向上させている
。The foam wire 11 of the cable usually has a three-layer structure in which a core wire made of copper or the like is covered with an insulating foam layer and a sheath in that order (see Figure 1). When used in wiring systems, there are usually strict standards for flame retardancy, and products that do not pass the standards cannot be used.For example, UL standard VW-
In a flame-retardant foamed electric wire that passes the standard No. 1, the flame retardance is improved by making the foam layer 2 shown in FIG. 1 thicker.
一方、ケーブルに使用する発泡電線は定格によって外径
（第１図に示すｄｓ）が決定されており、上記ＵＬ規格
のＶＷ−１では、外径：約２．１０〜２．５０■である
。この外径範囲内にある発泡電線の難燃性がＵＬ規格の
ＶＷ−１に及第しないと、規定のコンピュータ配線シス
テムに使用できないことになる。On the other hand, the outer diameter (ds shown in Figure 1) of foamed wires used in cables is determined by the rating, and according to the UL standard VW-1 mentioned above, the outer diameter is approximately 2.10 to 2.50 cm. . If the flame retardancy of the foamed wire within this outer diameter range does not meet the UL standard VW-1, it cannot be used in the specified computer wiring system.
難燃性発泡電線の難燃性を高めるには、発泡電線の大部
分を占める絶縁性発泡層の難燃性を高めることが肝要で
ある。これがために、発泡層の肉厚が相当に大きく取ら
れている。ところが、発泡電線の最大外径に制限がある
以上、発泡層を無闇に分厚くすればシースの肉厚が必然
的に小さくなり、電線の体裁が悪（なるだけでなく、肉
厚の発泡層を有する発泡電線は製造が困難である。In order to improve the flame retardancy of a flame-retardant foamed wire, it is important to improve the flame retardancy of the insulating foam layer that makes up the majority of the foamed wire. For this reason, the thickness of the foam layer is considerably increased. However, since there is a limit to the maximum outer diameter of a foam wire, if the foam layer is made too thick, the thickness of the sheath will inevitably become smaller, which will not only make the wire look bad (but also make the thick foam layer thinner). Foamed electric wires with such a structure are difficult to manufacture.
また、コンピュータ配線システムに使用する発泡電線は
、難燃性の他に、静電気の各種コンピュータ機器への影
響を防止する点から可及的に静電容量が小さいことも要
件である。ところが、絶縁性発泡層を厚くすると、それ
に随伴して静電容量が大きくなる。そのため、低静電容
量化するには発泡層はできるだけ薄肉であることが望ま
しいわけである。In addition to being flame retardant, foamed wires used in computer wiring systems are also required to have as small a capacitance as possible in order to prevent static electricity from affecting various computer devices. However, as the insulating foam layer becomes thicker, the capacitance increases accordingly. Therefore, in order to reduce the capacitance, it is desirable that the foam layer be as thin as possible.
従って本発明の目的は、以上の点を鑑みて、ＵＬ規格の
ＶＷ−１に合格すべき高難燃性にすると共に、製造容易
な難燃性発泡電線を提供することにある。Therefore, in view of the above points, it is an object of the present invention to provide a flame-retardant foamed electric wire that has high flame retardancy to pass UL standard VW-1 and is easy to manufacture.
本発明の別の目的は、ＵＬ規格のＶＷ−１に合格するこ
とを前提とした上で、可及的に静電容量の小さい難燃性
発泡電線を提供することにある。Another object of the present invention is to provide a flame-retardant foamed electric wire with as small a capacitance as possible on the premise that it passes VW-1 of the UL standard.
前記目的は、少なくとも導体心線、絶縁性発泡層、シー
スで構成される発泡電線において、発泡層が発泡度５０
％以上の発泡性組成物からなる難燃性高発泡電線により
達成される。The purpose is to provide a foamed wire comprising at least a conductor core wire, an insulating foamed layer, and a sheath, in which the foamed layer has a foaming degree of 50.
This is achieved by a flame-retardant highly foamed wire made of a foamable composition of at least %.
本発明の発泡電線は、難燃性試験のＵＬ規格：ＶＷ−１
に適格したもので、絶縁性発泡層が発泡度５０％以上の
高発泡性組成物からなるから、発泡層が従来に比較して
薄肉であっても十分な難燃性が得られると同時に、シー
スを肉厚にできる。The foamed electric wire of the present invention has a flame retardant test under the UL standard: VW-1.
Since the insulating foam layer is made of a highly foamable composition with a foaming degree of 50% or more, sufficient flame retardance can be obtained even if the foam layer is thinner than before. The sheath can be made thicker.
因みに、従来の発泡電線における発泡層の発泡度は精々
５０％程度と低発泡である。Incidentally, the foaming degree of the foam layer in the conventional foamed electric wire is at most about 50%, which is a low foaming degree.
また、絶縁性発泡層を薄肉にできるため発泡電線の静電
容量を低く抑えることができる。Furthermore, since the insulating foam layer can be made thin, the capacitance of the foam wire can be kept low.
本発明の発泡電線の構造は、通常は第１図に示した如く
少なくとも導体心線１、絶縁性発泡層２、シース３で構
成されていることは上記の通りである。As described above, the structure of the foamed electric wire of the present invention is usually composed of at least the conductor core wire 1, the insulating foam layer 2, and the sheath 3 as shown in FIG.
しかして、本発明において、導体心線の材料は特に限定
はないが、銅からなるものが一般的である。心線の直径
ｄ１は、当該発泡電線の定格にも依存するが、０．６０
〜０．６８ｍｍ程度、好ましくは０．６２〜０．６６
ｃｍ程度、特に好ましくは０．６４閣程度である。Accordingly, in the present invention, the material of the conductor core wire is not particularly limited, but it is generally made of copper. The diameter d1 of the core wire depends on the rating of the foamed wire, but is 0.60
~0.68mm or so, preferably 0.62~0.66
cm, particularly preferably about 0.64 cm.
絶縁性発泡層は発泡度５０％以上、好ましくは５５％以
上、さらに好ましくは６０〜７０％の絶縁性発泡層であ
り、当該発泡層は、例えば次の如き発泡性組成物によっ
て形成される。即ち、発泡性組成物は、例えば低密度ポ
リエチレン（ＬＤＰＥ）、エチレン・酢酸ビニル共重合
体（ＥＶＡ）、アクリル酸エチル（ＥＥＡ）などの樹脂
成分を主成分としくこれらの中でも、ＬＤＰＥは高密度
ポリエチレンに比べて易発泡性で発泡度５０％以上にす
るには最適である）、発泡剤としてはアゾジカルボンア
ミド、アゾビスイソブチロニトリル、ジニトロペンタメ
チレンテトラミン、パラトルエンスルホニルヒドラジド
、４．４′−オキシビスベンゼンスルホニルヒドラジッ
ド等の有機化学発泡剤、窒素ガス、プロパンガス、フレ
オンガス、アルゴン等の物理発泡剤等が挙げられる。発
泡剤の添加量は樹脂成分１００重量部に対して、０．５
〜３．０重量部、好ましくは１．０〜２．０重量部であ
る。The insulating foam layer has a foaming degree of 50% or more, preferably 55% or more, more preferably 60 to 70%, and the foam layer is formed, for example, from the following foamable composition. That is, foamable compositions are mainly composed of resin components such as low-density polyethylene (LDPE), ethylene-vinyl acetate copolymer (EVA), and ethyl acrylate (EEA). Among these, LDPE has a high density. (Easy to foam compared to polyethylene, suitable for achieving a foaming degree of 50% or more); Foaming agents include azodicarbonamide, azobisisobutyronitrile, dinitropentamethylenetetramine, paratoluenesulfonyl hydrazide, 4.4 Examples include organic chemical blowing agents such as '-oxybisbenzenesulfonyl hydrazide, physical blowing agents such as nitrogen gas, propane gas, freon gas, and argon. The amount of foaming agent added is 0.5 parts by weight per 100 parts by weight of the resin component.
-3.0 parts by weight, preferably 1.0-2.0 parts by weight.
なお、絶縁性発泡層は一種類の発泡剤によって発泡せし
めたものでもよいが、−層高発泡にするために発泡温度
が異なる二種類以上の発泡剤を併用することが好ましい
。その際の組み合わせとしては、例えばＰ、Ｐ−オキシ
ビスベンゼンスルホニルヒドラジド等の発泡温度１５０
〜１７０°Ｃ（好ましくは１５２〜１６８°Ｃ）の発泡
剤と、アゾジカルボンアミド等の発泡温度１９０〜２２
０℃（好ましくは１９２〜２１８℃）の発泡剤との組み
合わせが特に好適である。両発泡剤の配合割合は、それ
ぞれ０．２〜２重量部、好ましくは０．４〜１．６重量
部、特に好ましくは０．６〜１．４重量部である。Although the insulating foam layer may be foamed using one type of foaming agent, it is preferable to use two or more types of foaming agents having different foaming temperatures in order to achieve high foaming. In this case, the combination may be, for example, P, P-oxybisbenzenesulfonyl hydrazide with a foaming temperature of 150
-170°C (preferably 152-168°C) foaming agent and azodicarbonamide etc. at a foaming temperature of 190-22°C.
A combination with a blowing agent at 0°C (preferably 192-218°C) is particularly suitable. The mixing ratio of both blowing agents is 0.2 to 2 parts by weight, preferably 0.4 to 1.6 parts by weight, particularly preferably 0.6 to 1.4 parts by weight.
当該組成物中には、さらにプレートアウト防止剤、酸化
防止剤、銅害防止剤等を配合してもよい。The composition may further contain a plate-out inhibitor, an antioxidant, a copper damage inhibitor, and the like.
シースは発泡電線の難燃性試験に合格できる限り一般に
使用されるシース材料でよく、高難燃性を確保するには
０．６ ｒｍシートの酸素指数２０以上、好ましくは２
２以上、特に好ましくは２４以上のポリオレフィン材料
からなることが望ましい。シースの外径、すなわち発泡
電線の外径ｄ３は、前述したように定格があり、２．１
０〜２．５０ｎｕａ程度、好ましくは２．２０〜２．４
０ｍｍ程度である。The sheath may be any commonly used sheath material as long as it can pass the flame retardancy test for foamed wires, and to ensure high flame retardancy, the oxygen index of the 0.6 rm sheet should be 20 or more, preferably 2.
It is desirable to consist of 2 or more, particularly preferably 24 or more polyolefin materials. The outer diameter of the sheath, that is, the outer diameter d3 of the foam wire, has a rating as described above, and is 2.1
About 0 to 2.50 nua, preferably 2.20 to 2.4
It is about 0 mm.
上記外径ｄ、に関して、シース自体の肉厚は発泡層の肉
厚との兼合いがあるが、０．０７５ｍａ＋以上、好まし
くは０．１０ｍｍ以上、特に好ましくは０．１５閣程度
である。Regarding the above-mentioned outer diameter d, the thickness of the sheath itself has to be balanced with the thickness of the foam layer, but it is 0.075 mm or more, preferably 0.10 mm or more, and particularly preferably about 0.15 mm.
以下、本発明のｌ！ｆ燃性高発泡電線を実施例に基づい
て説明する。Below, l! of the present invention! The flammable highly foamed electric wire will be explained based on examples.
実施例１〜４・比較例１〜２
表Ｉに記す如き鋼心線、絶縁性発泡層、シースからなる
発泡電線についてＵＬ規格のＶＷ−１の難燃性試験を行
い、その結果を表Ｉに示した。Examples 1 to 4 and Comparative Examples 1 to 2 Foamed wires consisting of steel core wires, insulating foam layers, and sheaths as shown in Table I were subjected to flame retardancy tests according to UL standard VW-1, and the results are shown in Table I. It was shown to.
但し、発泡電線の外径は両側共同−とした。However, the outer diameter of the foamed wire was the same on both sides.
（以下余白）
〔発明の効果〕
以上説明したように、本発明の難燃性高発泡電線は、絶
縁性発泡層が発泡度５０％以上の発泡性組成物からなる
から、発泡層を従来よりも薄肉にしても適格に十分に足
る程度の難燃性が得られ、結果的にその分だけシースを
厚くすることができるので、発泡電線の体裁が非常に良
い。(The following is a blank space) [Effects of the Invention] As explained above, in the flame-retardant highly foamed electric wire of the present invention, since the insulating foam layer is made of a foam composition with a foaming degree of 50% or more, the foam layer is Even if the wire is made thinner, sufficient flame retardancy can be obtained, and as a result, the sheath can be made thicker by that amount, so the appearance of the foam wire is very good.
また、高発泡度であるため、発泡層を分厚くする必要も
なく、発泡電線の製造が容易になる。Furthermore, since the degree of foaming is high, there is no need to thicken the foam layer, making it easier to manufacture foamed electric wires.
さらには、絶縁性発泡層を可及的に薄くできるので、発
泡電線の静電容量を低く抑えることができる。Furthermore, since the insulating foam layer can be made as thin as possible, the capacitance of the foam wire can be kept low.
第１図は本発明の難燃性高発泡電線の一実施例の断面図
、第２図は絶縁性発泡電線を使用した一般的ケーブルの
構造を示す一部省略斜視図である。
Ｉｒｉ心！ｉｆ ｌ絶縁性発泡層３：シースFIG. 1 is a sectional view of one embodiment of the flame-retardant highly foamed electric wire of the present invention, and FIG. 2 is a partially omitted perspective view showing the structure of a general cable using the insulated foamed electric wire. Iri heart! if l Insulating foam layer 3: Sheath
Claims (3)
縁性発泡層と、発泡層上の周囲に設けたシースとで構成
される発泡電線において、発泡層が発泡度５０％以上の
発泡性組成物からなることを特徴とする難燃性高発泡電
線。(1) In a foamed electric wire consisting of at least a conductor core wire, an insulating foam layer provided around the core wire, and a sheath provided around the foam layer, the foam layer is foamed with a foaming degree of 50% or more. A flame-retardant highly foamed electric wire characterized by being made of a polyester composition.
にて発泡させてなるものであることを特徴とする請求項
（１）記載の難燃性高発泡電線。(2) The flame-retardant highly foamed electric wire according to claim (1), wherein the foam layer is formed by foaming with two or more types of foaming agents having different foaming temperatures.
り、シースが０．６ｍｍシートの酸素指数２０以上の材
料からなり、シースの径が２．１０〜２．５０ｍｍ程度
且つシースの肉厚が０．０７５ｍｍ以上であることを特
徴とする請求項（１）または（２）記載の難燃性高発泡
電線。(3) The diameter of the conductor core wire is approximately 0.60 to 0.68 mm, the sheath is made of a 0.6 mm sheet of material with an oxygen index of 20 or more, the diameter of the sheath is approximately 2.10 to 2.50 mm, and the sheath is The flame-retardant highly foamed electric wire according to claim 1 or 2, characterized in that the wall thickness of the wire is 0.075 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1216778A JPH0378910A (en) | 1989-08-23 | 1989-08-23 | Flame retardant high foam cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1216778A JPH0378910A (en) | 1989-08-23 | 1989-08-23 | Flame retardant high foam cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0378910A true JPH0378910A (en) | 1991-04-04 |
Family
ID=16693746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1216778A Pending JPH0378910A (en) | 1989-08-23 | 1989-08-23 | Flame retardant high foam cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0378910A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001052537A (en) * | 1999-08-09 | 2001-02-23 | Sumitomo Electric Ind Ltd | Non-halogen flame retardant shield cable |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395290A (en) * | 1977-01-31 | 1978-08-21 | Sumitomo Electric Ind Ltd | Insualting wires |
| JPS5811047A (en) * | 1981-07-03 | 1983-01-21 | クル−ゾ−・ロワ−ル | Method and device for pulverizing solid fuel |
-
1989
- 1989-08-23 JP JP1216778A patent/JPH0378910A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395290A (en) * | 1977-01-31 | 1978-08-21 | Sumitomo Electric Ind Ltd | Insualting wires |
| JPS5811047A (en) * | 1981-07-03 | 1983-01-21 | クル−ゾ−・ロワ−ル | Method and device for pulverizing solid fuel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001052537A (en) * | 1999-08-09 | 2001-02-23 | Sumitomo Electric Ind Ltd | Non-halogen flame retardant shield cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2157322C (en) | Dual insulated data communication cable | |
| US5670748A (en) | Flame retardant and smoke suppressant composite electrical insulation, insulated electrical conductors and jacketed plenum cable formed therefrom | |
| US5514837A (en) | Plenum cable | |
| USRE37010E1 (en) | Communication cable for use in a plenum | |
| US4412094A (en) | Compositely insulated conductor riser cable | |
| US5525757A (en) | Flame retardant polyolefin wire insulations | |
| US5744757A (en) | Plenum cable | |
| US5563377A (en) | Telecommunications cable | |
| US5378856A (en) | Transmission cable having a nonhalogenated jacket formulation | |
| US5936205A (en) | Communication cable for use in a plenum | |
| JPS59196509A (en) | Flame resistant cable | |
| JPH0378910A (en) | Flame retardant high foam cable | |
| JP2001135159A (en) | Non-halogen flame retardant resin-covered conductor | |
| JP3578657B2 (en) | Olefin foam masterbatch composition | |
| US5814406A (en) | Communication cable for use in a plenum | |
| JP2688024B2 (en) | Insulated wire | |
| JPH08124430A (en) | High voltage fire resisting cable | |
| CN220041444U (en) | Composite insulated cable | |
| JP2002150851A (en) | Fire retardant cable with fire extinguishing layer | |
| KR20130095747A (en) | Zero halogen cable | |
| JPH052938A (en) | Electric wire with foamed insulator and its manufacture | |
| JPH0353383Y2 (en) | ||
| CA2196485A1 (en) | Telecommunications cable | |
| JPS5996606A (en) | Refeactory wire | |
| JPS639955Y2 (en) |