JPH08306242A - Flame-retardant insulated wire - Google Patents
Flame-retardant insulated wireInfo
- Publication number
- JPH08306242A JPH08306242A JP7107695A JP10769595A JPH08306242A JP H08306242 A JPH08306242 A JP H08306242A JP 7107695 A JP7107695 A JP 7107695A JP 10769595 A JP10769595 A JP 10769595A JP H08306242 A JPH08306242 A JP H08306242A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- weight
- insulated wire
- parts
- pts
- 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
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- Compositions Of Macromolecular Compounds (AREA)
- Inorganic Insulating Materials (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高い電気絶縁性と難燃
性を兼ね備えた絶縁層の形成された難燃性絶縁電線に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant insulated wire having an insulating layer having both high electrical insulation and flame retardancy.
【０００２】[0002]
【従来の技術】電線、ケーブルの絶縁材料として多用さ
れているポリオレフィンを難燃化する場合、臭素、塩素
などのハロゲン系難燃剤の添加、もしくはノンハロゲン
系として無機難燃剤の添加などの手法がある。しかし、
ハロゲン系難燃剤であると、燃焼したときに、有毒、腐
食性ガスが生じるおそれがあり、問題がある。一方、ノ
ンハロゲン系であると、燃焼時、有毒、腐食性ガスは発
生しないという特長があるものの、使用する無機難燃剤
は吸湿しやすく、絶縁性が不十分でありがちであった。
そこで、無機難燃剤、例えば、金属水酸化物、主とし
て、水酸化マグネシウム、水酸化アルミニウムの表面を
脂肪酸などで表面処理することで疎水性を向上せしめ、
吸湿を防ぎ、絶縁性を付与している。2. Description of the Related Art When flame-retarding a polyolefin, which is often used as an insulating material for electric wires and cables, there is a method of adding a halogen-based flame retardant such as bromine or chlorine, or an inorganic flame-retardant as a non-halogen type. . But,
If the halogen-based flame retardant is used, there is a possibility that poisonous or corrosive gas may be generated when burned, which is a problem. On the other hand, the non-halogen type has a feature that no toxic or corrosive gas is generated during combustion, but the inorganic flame retardant used tends to absorb moisture and tends to have insufficient insulation.
Therefore, an inorganic flame retardant, for example, a metal hydroxide, mainly magnesium hydroxide, to improve the hydrophobicity by surface-treating the surface of aluminum hydroxide with a fatty acid,
Prevents moisture absorption and imparts insulation.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この無
機難燃剤の表面に脂肪酸処理を施してなるものは、長期
間の使用に対する耐久性については信頼性が不十分であ
るので、電線、ケーブルにおいて、高い絶縁性を必要と
しないシース材料としては多用されるものの、高い絶縁
性が要求される絶縁体に用いるのは不適当とされ、適用
箇所が限られている。However, since the inorganic flame retardant whose surface is treated with a fatty acid is not sufficiently reliable in terms of durability for long-term use, the wire and cable are Although it is often used as a sheath material that does not require high insulation, it is not suitable for use as an insulator that requires high insulation, and its application is limited.
【０００４】本発明は前記課題を解決するためになされ
たもので、長期間にわたって、高い絶縁性と難燃性を有
する絶縁層を有した難燃性絶縁電線を提供することを目
的とする。The present invention has been made to solve the above problems, and an object of the present invention is to provide a flame-retardant insulated wire having an insulating layer having high insulation and flame retardancy for a long period of time.
【０００５】[0005]
【課題を解決するための手段】本発明の難燃性絶縁電線
は、エチレン−プロピレン共重合体の１００重量部に、
リン酸エステルで表面処理された金属水酸化物の６０〜
２００重量部と、ジメタクリル酸亜鉛の１〜１５重量部
とが添加されて有機過酸化物架橋された樹脂からなる絶
縁層が導電線の周囲に形成されていることを特徴とする
ものである。The flame-retardant insulated wire of the present invention comprises 100 parts by weight of ethylene-propylene copolymer,
60-of metal hydroxide surface-treated with phosphate ester
The present invention is characterized in that 200 parts by weight of zinc dimethacrylate and 1 to 15 parts by weight of zinc dimethacrylate are added to form an insulating layer made of an organic peroxide-crosslinked resin around conductive lines. .
【０００６】[0006]
【作用】本発明の絶縁電線においては、導電線の周囲に
形成される絶縁層を構成する樹脂に、高い絶縁性と難燃
性を長期間にわたって付与させたことに特徴がある。本
発明においては、絶縁層の樹脂の主成分はエチレン−プ
ロピレン共重合体である。エチレン−プロピレン共重合
体は、第３成分の有るエチレン−プロピレン−ジエン三
元共重合体（ＥＰＤＭ）であっても、若しくは第３成分
のないエチレン−プロビレンゴム（ＥＰＭ）であっても
良い。また、電線に使用するため、そのムーニー粘度
（ＭＬ1+4（１００℃））は５０以下のものが好まし
い。The insulated wire of the present invention is characterized in that the resin forming the insulating layer formed around the conductive wire is provided with high insulation and flame retardancy for a long period of time. In the present invention, the main component of the resin of the insulating layer is ethylene-propylene copolymer. The ethylene-propylene copolymer may be an ethylene-propylene-diene terpolymer having a third component (EPDM) or an ethylene-propylene rubber (EPM) having no third component. Further, since it is used for electric wires, its Mooney viscosity (ML1 + 4 (100 ° C.)) is preferably 50 or less.
【０００７】さらに、本発明では、難燃剤として、リン
酸エステルで表面処理された金属水酸化物が添加され
る。金属水酸化物としては、水酸化マグネシウム、水酸
化アルミニウム、水酸化カルシウムなどが適用できる。
その粒径は０.３〜１.２μｍのものが好ましい。金属水
酸化物へのリン酸エステルでの表面処理は、スラリー状
の金属水酸化物とリン酸エステル水溶液を約８０℃雰囲
気下で約１０分間高速攪拌することによりなされる。こ
のリン酸エステルで表面処理された水酸化マグネシウム
は、樹脂の主成分となるエチレン−プロピレン共重合体
の１００重量部に対して、６０〜２００重量部添加され
る。６０重量部よりも少ないと、難燃性が十分に発揮さ
れず、２００重量部よりも多いと、機械特性が悪化して
しまい、絶縁電線として好ましくないからである。Further, in the present invention, a metal hydroxide surface-treated with a phosphoric acid ester is added as a flame retardant. As the metal hydroxide, magnesium hydroxide, aluminum hydroxide, calcium hydroxide or the like can be applied.
The particle size is preferably 0.3 to 1.2 μm. The surface treatment of the metal hydroxide with the phosphoric acid ester is performed by rapidly stirring the slurry metal hydroxide and the phosphoric acid ester aqueous solution under an atmosphere of about 80 ° C. for about 10 minutes. The magnesium hydroxide surface-treated with the phosphoric acid ester is added in an amount of 60 to 200 parts by weight with respect to 100 parts by weight of the ethylene-propylene copolymer as the main component of the resin. If it is less than 60 parts by weight, the flame retardancy is not sufficiently exhibited, and if it is more than 200 parts by weight, the mechanical properties are deteriorated and it is not preferable as an insulated wire.
【０００８】さらに、本発明においては、架橋助剤とし
てジメタクリル酸亜鉛が添加される。このジメタクリル
酸亜鉛は絶縁性を長期間にわたって保つ作用がある。ジ
メタクリル酸亜鉛は、主成分となるエチレン−プロピレ
ン共重合体の１００重量部に対して、１〜１５重量部添
加される。添加量が１重量部よりも少なくても又は１５
重量部よりも多くても機械特性が悪化してしまい、絶縁
電線として好ましくなくなってしまう。Further, in the present invention, zinc dimethacrylate is added as a crosslinking aid. This zinc dimethacrylate has the function of maintaining its insulating property for a long period of time. Zinc dimethacrylate is added in an amount of 1 to 15 parts by weight with respect to 100 parts by weight of the main component ethylene-propylene copolymer. Addition amount less than 1 part by weight or 15
Even if the amount is more than the weight part, the mechanical properties are deteriorated, which is not preferable as an insulated wire.
【０００９】本発明での樹脂は、適宜、有機過酸化物が
添加されて使用される。有機過酸化物としては、ジクミ
ルペルオキシド（ＤＣＰ）、ジ−ｔ−ブチルペルオキシ
ド、ｔ−ブチルクミルペルオキシドなどが適用できる。The resin used in the present invention is used by appropriately adding an organic peroxide. As the organic peroxide, dicumyl peroxide (DCP), di-t-butyl peroxide, t-butyl cumyl peroxide or the like can be applied.
【００１０】上記絶縁層を構成する樹脂には、その他に
も、本発明の特性を損なわない範囲で、その他の添加
剤、酸化防止剤、加工助剤、フィラー、顔料、染料、界
面活性剤、老化防止剤などの一種または二種以上を適宜
必要に応じて配合することができる。In addition to the above-mentioned resin constituting the insulating layer, other additives, antioxidants, processing aids, fillers, pigments, dyes, surfactants, etc. may be used as long as the characteristics of the present invention are not impaired. One kind or two or more kinds of antiaging agents and the like can be appropriately blended as necessary.
【００１１】本発明の絶縁電線において、導電線の周囲
に形成される層を複数層で構成することは勿論良く、そ
のうちの少なくとも１層を上記特殊なエチレン−プロピ
レン共重合体を主とする樹脂で構成すれば良い。In the insulated wire of the present invention, it is of course possible to form a plurality of layers around the conductive wire, and at least one of the layers is a resin mainly containing the above-mentioned special ethylene-propylene copolymer. It can be configured with.
【００１２】本発明での特殊な樹脂であれば、長期間に
わたって、高い絶縁性と難燃性を発揮するので信頼性が
高く、絶縁電線においてシース材料でなく絶縁体として
も使用することが可能となる。Since the special resin of the present invention exhibits high insulation and flame retardancy for a long period of time, it has high reliability and can be used as an insulator instead of a sheath material in an insulated wire. Becomes
【００１３】[0013]
【実施例】本発明の絶縁電線の絶縁層に使用する樹脂に
ついて、その体積低効率の経時変化と、機械特性および
難燃性を試験した。樹脂の成分は、表１に示す各種のも
の（Ｎｏ．１〜７）とした。また、比較例（Ｎｏ．１〜
９）を表２に示した。尚、表１，２中、樹脂の欄におい
て、ＥＰＤＭ*1は、三井化学石油（株）製「ＥＰＴ３０
４５」（第３成分−ＥＮＢ型）、ＥＰＤＭ*2は、三井化
学石油（株）製「ＥＰＴ１０３５」（第３成分−ＤＣＰ
Ｄ型）、ＥＰＭ*3は、三井化学石油（株）製「ＥＰＴ０
０４５」、難燃剤の欄において、未処理Mg(OH)2 *4は協
和化学（株）製「キスマ５」、ステアリン酸処理Mg(OH)
2 *5は協和化学（株）製「キスマ５Ａ」、オレイン酸処
理Mg(OH)2 *6は協和化学（株）製「キスマ５Ｂ」、リン
酸エステル処理Mg(OH)2 *7は協和化学（株）製「キスマ
５Ｊである。また、堆積抵抗率は、厚さ１mmのシート状
のサンプルに対し、ＤＣ５００Ｖの電圧を印加して常温
で低効率を測定したものである。機械特性は、引張試験
（ＪＩＳ Ｋ６３０１に準拠）で判断した。即ち、厚さ
１mmのシートをＪＩＳ３号ダンベルで打抜いたものを、
５００mm／minで引張り、破断強度が０．４１kg／mm2以
上、伸びが３５０％以上のものを「良」、それ以外を
「悪」として表中に表記した。難燃性は、酸素指数法
（ＪＩＳ Ｋ７２０１に準拠）にて判定した。結果が２
５以上のもの「良」、２５未満のものを「悪」として表
中に表記した。EXAMPLE The resin used for the insulating layer of the insulated wire of the present invention was tested for its low volume efficiency over time, mechanical properties and flame retardancy. Various resin components (Nos. 1 to 7) shown in Table 1 were used. In addition, a comparative example (No. 1 to No. 1)
9) is shown in Table 2. In Tables 1 and 2, in the column of resin, EPDM * 1 is “EPT30” manufactured by Mitsui Chemicals, Inc.
45 "(third component-ENB type) and EPDM * 2 are" EPT1035 "(third component-DCP) manufactured by Mitsui Chemicals, Inc.
D type) and EPM * 3 are "EPT0" manufactured by Mitsui Chemicals, Inc.
045 ", flame-retardant column, untreated Mg (OH) 2 * 4 is Kyowa Chemical Co., Ltd.'s" Kisuma 5 ", stearic acid treated Mg (OH)
2 * 5 is "Kisuma 5A" manufactured by Kyowa Chemical Co., Ltd., Mg (OH) 2 * 6 treated with oleic acid is "Kisuma 5B" manufactured by Kyowa Chemical Co., Ltd. Mg (OH) 2 * 7 treated with phosphate ester is Kyowa "Kisuma 5J" manufactured by Kagaku Co., Ltd. The deposition resistance is a low-efficiency measured at room temperature by applying a voltage of 500 V DC to a sheet-shaped sample having a thickness of 1 mm. Judgment was made by a tensile test (according to JIS K6301), that is, a 1 mm-thick sheet punched with a JIS No. 3 dumbbell,
Those having tensile strength of 500 mm / min, breaking strength of 0.41 kg / mm 2 or more and elongation of 350% or more are shown as "good", and others are shown as "bad". The flame retardancy was determined by the oxygen index method (based on JIS K7201). Result is 2
Those with 5 or more were marked as “good”, and those with less than 25 were marked as “bad” in the table.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】表１から、本発明に相当する実施例１〜７
のものであると、いずれも、長期間にわたって高い抵抗
率を示しつつも、機械特性、難燃性にも優れていること
が明らかにわかる。これに対し、表２から、水酸化マグ
ネシウムの難燃剤を添加しつつも、リン酸エステルで表
面処理をしていない比較例１〜３については時間経過と
共に抵抗率が低下してしまっている。また、加硫助剤を
添加しつつもジメタクリル酸亜鉛以外の加硫助剤を添加
している比較例４，５についても時間経過と共に抵抗率
が低下してしまっている。さらにまた、加硫助剤として
ジメタクリル酸亜鉛を添加しつつも、その添加量の少な
い比較例６や添加量の多い比較例７であると、絶縁性は
良好であるものの、機械特性が悪化してしまっている。
また、難燃剤としてリン酸エステルで表面処理をしてい
る水酸化マグネシウムを添加しているものの、その添加
量の少ない比較例８では難燃性が不良で、添加量の多い
比較例９では機械特性が悪化してしまっている。From Table 1, Examples 1 to 7 corresponding to the present invention are shown.
It is clearly understood that all of them have excellent mechanical properties and flame retardancy while exhibiting high resistivity for a long period of time. On the other hand, from Table 2, in Comparative Examples 1 to 3 in which the surface treatment with the phosphoric acid ester was not performed even though the flame retardant of magnesium hydroxide was added, the resistivity decreased with the passage of time. Further, in Comparative Examples 4 and 5 in which the vulcanization aid other than zinc dimethacrylate was added while the vulcanization aid was added, the resistivity decreased with the lapse of time. Furthermore, in Comparative Example 6 in which zinc dimethacrylate is added as a vulcanization aid and the amount thereof is small and Comparative Example 7 in which the amount is large, the insulating property is good, but the mechanical properties are deteriorated. I have done it.
Further, although magnesium hydroxide surface-treated with a phosphoric acid ester was added as a flame retardant, the flame retardancy was poor in Comparative Example 8 in which the addition amount was small and the mechanical property in Comparative Example 9 in which the addition amount was large. The characteristics have deteriorated.
【００１７】[0017]
【発明の効果】本発明の難燃性絶縁電線は、エチレン−
プロピレン共重合体の１００重量部に、リン酸エステル
で表面処理された金属水酸化物の６０〜２００重量部
と、ジメタクリル酸亜鉛の１〜１５重量部とが添加され
て有機過酸化物架橋された樹脂からなる絶縁層が導電線
の周囲に形成されていることを特徴としたもので、その
絶縁層は長期間にわたって高い絶縁性と難燃性を発揮す
ることができる。また、使用する難燃剤はノンハロゲン
系であるので、有毒ガスの発生などのおそれもない。The flame-retardant insulated wire of the present invention is made of ethylene-
To 100 parts by weight of the propylene copolymer, 60 to 200 parts by weight of a metal hydroxide surface-treated with a phosphoric acid ester and 1 to 15 parts by weight of zinc dimethacrylate are added to crosslink the organic peroxide. It is characterized in that an insulating layer made of the above resin is formed around the conductive wire, and the insulating layer can exhibit high insulating property and flame retardancy for a long period of time. Further, since the flame retardant used is a non-halogen type, there is no fear of generation of toxic gas.
Claims (1)
重量部に、リン酸エステルで表面処理された金属水酸化
物の６０〜２００重量部と、ジメタクリル酸亜鉛の１〜
１５重量部とが添加されて有機過酸化物架橋された樹脂
からなる絶縁層が導電線の周囲に形成されていることを
特徴とする難燃性絶縁電線。1. An ethylene-propylene copolymer of 100.
60 parts by weight to 200 parts by weight of a metal hydroxide surface-treated with a phosphoric acid ester, and 1 part by weight of zinc dimethacrylate.
A flame-retardant insulated wire, wherein an insulating layer made of a resin cross-linked with 15 parts by weight of organic peroxide is formed around a conductive wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7107695A JPH08306242A (en) | 1995-05-01 | 1995-05-01 | Flame-retardant insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7107695A JPH08306242A (en) | 1995-05-01 | 1995-05-01 | Flame-retardant insulated wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08306242A true JPH08306242A (en) | 1996-11-22 |
Family
ID=14465616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7107695A Pending JPH08306242A (en) | 1995-05-01 | 1995-05-01 | Flame-retardant insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08306242A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010535267A (en) * | 2007-07-30 | 2010-11-18 | ビーアールピー マニュファクチャリング カンパニー | Encapsulation materials and related devices |
| JP2011219509A (en) * | 2010-04-02 | 2011-11-04 | Toyoda Gosei Co Ltd | Vulcanized rubber material |
| EP2522694A1 (en) | 2011-05-12 | 2012-11-14 | Lapp Engineering & Co. | Composite material |
| JP2020084137A (en) * | 2018-11-30 | 2020-06-04 | 三井化学株式会社 | Ethylene copolymer composition and hose product |
| JP2020084135A (en) * | 2018-11-30 | 2020-06-04 | 三井化学株式会社 | Ethylene copolymer composition and hose product |
| CN112810098A (en) * | 2020-12-21 | 2021-05-18 | 安徽杰蓝特新材料有限公司 | Insulation flame-retardant MPP power cable pipe and preparation method thereof |
-
1995
- 1995-05-01 JP JP7107695A patent/JPH08306242A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010535267A (en) * | 2007-07-30 | 2010-11-18 | ビーアールピー マニュファクチャリング カンパニー | Encapsulation materials and related devices |
| JP2011219509A (en) * | 2010-04-02 | 2011-11-04 | Toyoda Gosei Co Ltd | Vulcanized rubber material |
| EP2522694A1 (en) | 2011-05-12 | 2012-11-14 | Lapp Engineering & Co. | Composite material |
| EP2522693A1 (en) * | 2011-05-12 | 2012-11-14 | Lapp Engineering & Co. | Composite material |
| JP2020084137A (en) * | 2018-11-30 | 2020-06-04 | 三井化学株式会社 | Ethylene copolymer composition and hose product |
| JP2020084135A (en) * | 2018-11-30 | 2020-06-04 | 三井化学株式会社 | Ethylene copolymer composition and hose product |
| CN112810098A (en) * | 2020-12-21 | 2021-05-18 | 安徽杰蓝特新材料有限公司 | Insulation flame-retardant MPP power cable pipe and preparation method thereof |
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