JPH0992035A - Crosslinked-polyethylene-insulated wire for outdoor use - Google Patents

Crosslinked-polyethylene-insulated wire for outdoor use

Info

Publication number
JPH0992035A
JPH0992035A JP7246025A JP24602595A JPH0992035A JP H0992035 A JPH0992035 A JP H0992035A JP 7246025 A JP7246025 A JP 7246025A JP 24602595 A JP24602595 A JP 24602595A JP H0992035 A JPH0992035 A JP H0992035A
Authority
JP
Japan
Prior art keywords
polyethylene
polyolefin
density polyethylene
weight
insulated wire
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.)
Granted
Application number
JP7246025A
Other languages
Japanese (ja)
Other versions
JP3846922B2 (en
Inventor
Tei Ishii
禎 石井
Hidemi Nishiyama
秀美 西山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP24602595A priority Critical patent/JP3846922B2/en
Publication of JPH0992035A publication Critical patent/JPH0992035A/en
Application granted granted Critical
Publication of JP3846922B2 publication Critical patent/JP3846922B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a crosslinked-polyethylene-insulated wire for outdoor use, which prevents dimensional errors of projections by improving undeformability during crosslinking process and which is excellent in flexibility and tracking resistance during use. SOLUTION: This crosslinked-polyethylene-insulated wire for outdoor use is obtained in which an insulator covering a conductor is formed by extruding and crosslinking a resin composition that is obtained when a polyolefin comprising 100 to 40wt.% straight chain low-density polyethylene and 0 to 60wt.% high-pressure-method low-denslity polyethylene, with their admixture having a density of 0.915 to 0.932, an organic silane compound, an organic peroxide, a silanol condensation catalyst, and carbon black are admixed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、製造時の耐変形性
ならびに使用時の可撓性および耐トラッキング性に優れ
た被覆絶縁体を有する屋外用架橋ポリエチレン絶縁電線
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor cross-linked polyethylene insulated wire having a coated insulator which is excellent in deformation resistance during manufacture and flexibility and tracking resistance during use.

【0002】[0002]

【従来の技術】従来から、電線・ケーブルの絶縁材料に
使用される架橋ポリエチレンの架橋方式としては、過酸
化物架橋、電子線照射架橋およびシラン架橋が知られて
いる。このうち過酸化物架橋は、導体上に架橋可能なポ
リエチレン組成物を絶縁体として押出被覆し、押出機の
後段に設けた架橋管内に連続的に通し、高温高圧の水蒸
気により加熱して樹脂組成物を架橋する方法である。ま
た電子線照射架橋は、押出機の後段に、過酸化物架橋方
式で用いられる架橋管の代わりに、電子線照射機を設
け、電子線を照射して樹脂組成物を架橋する方法であ
る。これらの方法では、押出機に続けて架橋管および冷
却管、または電子線照射機を配置するため、設備が大規
模かつ高価になる。
2. Description of the Related Art Conventionally, peroxide crosslinking, electron beam irradiation crosslinking and silane crosslinking have been known as crosslinking methods for crosslinked polyethylene used as an insulating material for electric wires and cables. Among them, peroxide crosslinking is a resin composition obtained by extrusion-coating a crosslinkable polyethylene composition on a conductor as an insulator, continuously passing it through a crosslinking tube provided in the latter stage of the extruder, and heating it with high-temperature and high-pressure steam. It is a method of cross-linking things. Further, electron beam irradiation crosslinking is a method in which an electron beam irradiation device is provided in the latter stage of the extruder instead of the crosslinking tube used in the peroxide crosslinking method, and the resin composition is crosslinked by irradiating with an electron beam. In these methods, since an extruder is followed by a bridge tube and a cooling tube, or an electron beam irradiator, the equipment becomes large-scale and expensive.

【0003】これに対して、シラン架橋は基本的には一
般の押出設備で十分対応可能な方法であり、過酸化物架
橋または電子線照射架橋のような大きな設備を必要とせ
ず、これらの方法に比較してかなり扱いやすい方法であ
るといえる。このシラン架橋には、いわゆるモノシルプ
ロセスおよびサイオプラスプロセスの2つの方法が知ら
れている。前者のモノシルプロセスはポリエチレンへの
有機シラン化合物のグラフト反応工程と押出被覆工程を
連続的に行う方法であり、同一組成物を用いて連続生産
する場合に適している。後者のサイオプラスプロセスは
グラフト反応工程と押出被覆工程とを別々に行う方法で
あり、使用可能な組成物の種類が幅広く、しかも小規模
な設備で実施可能であるという利点がある。
On the other hand, silane cross-linking is basically a method that can be sufficiently coped with by general extrusion equipment, and does not require large equipment such as peroxide cross-linking or electron beam irradiation cross-linking, and these methods can be used. It can be said that this method is considerably easier to handle than. Two known methods for this silane crosslinking are the so-called monosil process and the Sioplus process. The former monosil process is a method of continuously performing a graft reaction step of an organosilane compound onto polyethylene and an extrusion coating step, and is suitable for continuous production using the same composition. The latter Sioplus process is a method in which the graft reaction step and the extrusion coating step are performed separately, and has the advantage that a wide variety of compositions can be used and that it can be carried out in a small-scale facility.

【0004】ここで、シラン架橋における架橋反応は樹
脂組成物をシラノール縮合触媒の存在下に水にさらすこ
とによって行なわれる(例えば、特公昭48−1711
号公報、特開昭49−134751号公報など)。この
架橋反応は、大気中に存在する微量な水分によっても十
分に進行するという特徴を有するため、押出被覆工程後
に自然放置するだけでもよい。しかし、自然放置して架
橋させると長時間を要する。そこで、処理時間を短縮す
るためには、導体上にシラン架橋可能なポリエチレン組
成物を押出被覆した後に70〜90℃の温水バスに1〜
15時間程度浸漬して架橋する方法を採ることもある。
いずれにしても、シラン架橋方式では、架橋処理前の樹
脂組成物はポリエチレンの特性を強く保持しているた
め、架橋工程で加わる熱や、巻張力と自重から加わる応
力によって絶縁体が変形しやすい。
Here, the crosslinking reaction in the silane crosslinking is carried out by exposing the resin composition to water in the presence of a silanol condensation catalyst (for example, Japanese Patent Publication No. 48-1711).
JP-A-49-134751, etc.). This cross-linking reaction has a characteristic that it sufficiently proceeds even with a small amount of water present in the atmosphere, and therefore it may be left alone after the extrusion coating step. However, it takes a long time to crosslink by leaving it to stand. Therefore, in order to reduce the treatment time, the conductor is extrusion-coated with a silane-crosslinkable polyethylene composition, and then the composition is placed in a hot water bath at 70 to 90 ° C.
The method of immersing for about 15 hours and crosslinking may be taken.
In any case, in the silane cross-linking method, since the resin composition before the cross-linking treatment strongly retains the characteristics of polyethylene, the insulator is likely to be deformed by the heat applied in the cross-linking step or the stress applied from the winding tension and the self-weight. .

【0005】また、屋外用途の架橋ポリエチレン絶縁電
線は、着雪防止の機能を付与するために長手方向に沿っ
て連続的に少なくとも一条の突起体(ヒレ)を設けた構
造のものが多い(例えば特公昭58−11045号公
報、特開昭62−211806号公報など)。このよう
な構造の屋外用シラン架橋ポリエチレン電線では架橋反
応時に突起体が変形しやすい。特に夏場などにおいてド
ラム巻で放置して架橋を進行させる場合、その突起体が
変形することが多い。また、温水処理により架橋させる
場合には、突起体が所定の形状を維持できずに倒れたり
崩れるという問題がある。このような変形が生じると、
外観不良をもたらすとともに突起体が本来発揮すべき着
雪防止機能を損なうことがある。さらに、屋外用架橋ポ
リエチレン絶縁電線は、屋外という使用環境に耐え得る
ために高度な耐候性や耐トラッキング性などの高い品質
が要求される。しかし、突起体が変形して寸法ズレを起
こすと、その個所に塩分を含む水分や各種電解質などが
溜まって耐トラッキング性を低下させる原因となる。
Further, many cross-linked polyethylene insulated electric wires for outdoor use have a structure in which at least one projection (fin) is continuously provided along the longitudinal direction in order to impart a function of preventing snow accretion (eg, fins). JP-B-58-11045, JP-A-62-2111806, etc.). In the outdoor silane-crosslinked polyethylene electric wire having such a structure, the projection is easily deformed during the crosslinking reaction. In particular, when it is left to stand in a drum winding to proceed with crosslinking in the summer, the projections are often deformed. Further, in the case of crosslinking by hot water treatment, there is a problem that the projection cannot maintain a predetermined shape and falls or collapses. When such deformation occurs,
This may result in a poor appearance and may impair the snow accretion prevention function that the protrusion should originally exhibit. Further, the outdoor cross-linked polyethylene insulated wire is required to have high quality such as high weather resistance and tracking resistance in order to withstand the outdoor use environment. However, when the protrusions are deformed and cause dimensional deviation, moisture containing salt and various electrolytes are accumulated at those locations, which causes deterioration in tracking resistance.

【0006】これらの種々の問題点が生じるのは、上述
したように架橋がまだ十分に進行していない被覆絶縁体
に対して熱や応力が働くためである。そこで、巻張力や
自重による応力を極力抑えることが考えられるが、応力
を極端に抑えようとすると逆に生産性が低下したり、巻
崩れなどによる傷が生じて外観を損ねることになる。ま
た、架橋工程での熱に起因する変形を抑えるためには、
樹脂組成物中に耐熱変形性に優れた高密度のポリオレフ
ィンを配合することが考えられるが、この場合かえって
電線としての可撓性が損なわれ、著しく取り扱いにくく
なる。
These various problems occur because heat and stress act on the coated insulator which has not yet been sufficiently crosslinked as described above. Therefore, it is conceivable to suppress the stress due to the winding tension and the self-weight as much as possible. However, if the stress is extremely suppressed, the productivity is decreased, or the damage due to the collapse of the winding occurs and the appearance is impaired. Further, in order to suppress the deformation due to heat in the crosslinking step,
It is conceivable to mix a high-density polyolefin excellent in heat distortion resistance into the resin composition, but in this case, the flexibility as an electric wire is rather deteriorated and it becomes extremely difficult to handle.

【0007】[0007]

【発明が解決しようとする課題】本発明の目的は、架橋
工程時の耐変形性を改善して突起体の寸法不良などを防
止し、さらには使用時の可撓性および耐トラッキング性
に優れた屋外用架橋ポリエチレン絶縁電線を提供するこ
とを目的とするものである。
DISCLOSURE OF THE INVENTION The object of the present invention is to improve the deformation resistance during the cross-linking process to prevent dimensional defects of the protrusions, and to have excellent flexibility and tracking resistance during use. It is intended to provide a cross-linked polyethylene insulated electric wire for outdoor use.

【0008】[0008]

【課題を解決するための手段】本発明の屋外用架橋ポリ
エチレン絶縁電線は、直鎖状低密度ポリエチレン100
〜40重量%および高圧法低密度ポリエチレン0〜60
重量%からなりこれらの混和物の密度が0.915〜
0.932であるポリオレフィンと、有機シラン化合物
と、有機過酸化物と、シラノール縮合触媒と、カーボン
ブラックとを混和してなる樹脂組成物、または前記ポリ
オレフィンに有機過酸化物の存在下で有機シラン化合物
を反応させて得られるシラン変性ポリオレフィンと、シ
ラノール縮合触媒と、カーボンブラックとを混和してな
る樹脂組成物を、導体上に押出被覆し架橋して絶縁体を
形成したことを特徴とするものである。
The outdoor cross-linked polyethylene insulated wire of the present invention is a linear low-density polyethylene 100.
~ 40 wt% and high pressure low density polyethylene 0-60
And the density of these admixtures is 0.915-
A resin composition obtained by mixing a polyolefin of 0.932, an organic silane compound, an organic peroxide, a silanol condensation catalyst, and carbon black, or an organic silane in the presence of an organic peroxide in the polyolefin. A resin composition obtained by mixing a silane-modified polyolefin obtained by reacting a compound, a silanol condensation catalyst, and carbon black, which is extrusion-coated on a conductor and crosslinked to form an insulator. Is.

【0009】本発明において、前記ポリオレフィンは直
鎖状低密度ポリエチレン80〜40重量%および高圧法
低密度ポリエチレン20〜60重量%からなるものであ
ることが好ましい。また、樹脂組成物には、さらにフッ
化ビニリデン系材料またはシリコーン系材料を含有させ
てもよい。また、樹脂組成物を導体上に押出被覆し架橋
して形成される絶縁体には、通常、長手方向に沿って連
続的に形成された少なくとも1条の突起体が形成され
る。
In the present invention, the polyolefin preferably comprises 80 to 40% by weight of linear low-density polyethylene and 20 to 60% by weight of high-pressure low-density polyethylene. Further, the resin composition may further contain a vinylidene fluoride material or a silicone material. In addition, an insulator formed by extrusion coating a resin composition on a conductor and crosslinking the conductor usually has at least one projection formed continuously along the longitudinal direction.

【0010】[0010]

【発明の実施の形態】以下、本発明をさらに詳細に説明
する。まず、本発明の屋外用架橋ポリエチレン絶縁電線
に用いられる樹脂組成物を構成する成分について説明す
る。本発明においては、樹脂成分として直鎖状低密度ポ
リエチレンおよび高圧法低密度ポリエチレンからなるポ
リオレフィンが用いられる。ここで、直鎖状低密度ポリ
エチレンとは、エチレンと、ブテン−1、ペンテン−1
など炭素数4以上のα−オレフィンとの共重合体を意味
する。このポリオレフィンは、直鎖状低密度ポリエチレ
ン100〜40重量%と高圧法低密度ポリエチレンを0
〜60重量%とを配合したものである。直鎖状低密度ポ
リエチレンと高圧法低密度ポリエチレンとの配合量が上
記のように規定されたポリオレフィンを用いると、架橋
時における変形が抑制され、特に構造上設けられる突起
体の倒れや崩れが改善できる。さらに、架橋工程の初期
に発生する突起体の倒れや崩れをほぼ完全に防止するた
めには、直鎖状低密度ポリエチレン80〜40重量%お
よび高圧法低密度ポリエチレン20〜60重量%からな
るポリオレフィンを用いることがより好ましい。これは
以下のような理由による。すなわち、直鎖状低密度ポリ
エチレンが80重量%より多く、高圧法低密度ポリエチ
レンが20重量%より少ない場合には、熱変形耐性が良
好になるものの、架橋速度が遅くなる。逆に、直鎖状低
密度ポリエチレンが40重量%より少なく、高圧法低密
度ポリエチレンが60重量%より多くなると、架橋速度
は速くなるものの、熱変形耐性が劣化して突起体の崩れ
が生じることがある。また、直鎖状低密度ポリエチレン
と高圧法低密度ポリエチレンとの混和物の密度は0.9
15〜0.932の範囲であることが要求される。これ
は、密度が0.915より小さいと絶縁体としての強度
が低下し、逆に0.932を超えると絶縁電線としての
可撓性を著しく損なうためである。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, the components constituting the resin composition used in the outdoor cross-linked polyethylene insulated wire of the present invention will be described. In the present invention, a polyolefin composed of linear low-density polyethylene and high-pressure low-density polyethylene is used as the resin component. Here, linear low-density polyethylene means ethylene, butene-1, and pentene-1.
Etc. means a copolymer with an α-olefin having 4 or more carbon atoms. This polyolefin contains 100 to 40% by weight of linear low-density polyethylene and high-pressure low-density polyethylene.
Up to 60% by weight. When a polyolefin whose blending amount of linear low-density polyethylene and high-pressure low-density polyethylene is regulated as described above is used, deformation at the time of cross-linking is suppressed, and in particular, collapse and collapse of the protrusions provided in the structure are improved. it can. Further, in order to almost completely prevent the protrusions from collapsing or collapsing occurring in the initial stage of the crosslinking step, a polyolefin comprising 80 to 40% by weight of linear low-density polyethylene and 20 to 60% by weight of high-pressure low-density polyethylene. Is more preferably used. This is for the following reasons. That is, when the linear low density polyethylene is more than 80% by weight and the high pressure method low density polyethylene is less than 20% by weight, the thermal deformation resistance is good, but the crosslinking rate is slow. On the other hand, when the linear low density polyethylene is less than 40% by weight and the high pressure method low density polyethylene is more than 60% by weight, the cross-linking speed increases, but the thermal deformation resistance deteriorates and the projections collapse. There is. The density of the mixture of linear low-density polyethylene and high-pressure low-density polyethylene is 0.9.
It is required to be in the range of 15 to 0.932. This is because if the density is less than 0.915, the strength as an insulator decreases, and conversely if it exceeds 0.932, the flexibility as an insulated wire is significantly impaired.

【0011】なお、前記混和物のための直鎖状低密度ポ
リエチレンおよび高圧法低密度ポリエチレンとしては、
それぞれ密度0.915〜0.935および0.915
〜0.928のものを用いることができる。
The linear low-density polyethylene and high-pressure low-density polyethylene for the above-mentioned admixture are as follows:
Density 0.915-0.935 and 0.915 respectively
˜0.928 can be used.

【0012】有機シラン化合物は、後述する有機過酸化
物の存在下で前記ポリオレフィンと反応するものであ
り、一般式:RR’SiY2 (式中、Rは例えばビニル
基、アリル基などの不飽和炭化水素基またはアルコキシ
ル基、Yはメトキシ基、エトキシ基、ブトキシ基に代表
されるアルコキシル基などの加水分解可能な有機基、
R’はRまたはYと同様の置換基である。)で表され
る。より具体的には、ビニルトリメトキシシラン、ビニ
ルトリエトキシシランなどが挙げられる。有機シラン化
合物の配合量はポリオレフィンに対して0.5〜10重
量%であることが好ましい。これは、0.5重量%未満
では十分にシラン架橋が進行せず、逆に10重量%を超
えるとポリオレフィンにグラフトされない過剰の有機シ
ラン化合物が残るため発泡が生じる。
The organic silane compound is a compound which reacts with the above-mentioned polyolefin in the presence of an organic peroxide, which will be described later, and has a general formula: RR'SiY 2 (wherein R is an unsaturated group such as a vinyl group or an allyl group). Hydrocarbon group or alkoxyl group, Y is a hydrolyzable organic group such as methoxy group, ethoxy group, alkoxyl group represented by butoxy group,
R'is a substituent similar to R or Y. ). More specific examples include vinyltrimethoxysilane and vinyltriethoxysilane. The compounding amount of the organic silane compound is preferably 0.5 to 10% by weight with respect to the polyolefin. This is because if the amount is less than 0.5% by weight, the silane crosslinking does not proceed sufficiently, and conversely, if the amount exceeds 10% by weight, an excessive amount of the organic silane compound that is not grafted to the polyolefin remains, so that foaming occurs.

【0013】有機過酸化物としては、ジクミルペルオキ
シドなどが挙げられる。有機過酸化物の配合量はポリオ
レフィンに対して0.05〜1.0重量%であることが
好ましい。
Examples of organic peroxides include dicumyl peroxide. The blending amount of the organic peroxide is preferably 0.05 to 1.0% by weight with respect to the polyolefin.

【0014】シラノール縮合触媒としては、ジブチル錫
ジラウレートやジオクチル錫ジラウレートなどが挙げら
れる。シラノール縮合触媒の配合量はポリオレフィンに
対して0.05〜1.0重量%であることが好ましい。
Examples of silanol condensation catalysts include dibutyltin dilaurate and dioctyltin dilaurate. The amount of the silanol condensation catalyst blended is preferably 0.05 to 1.0% by weight based on the polyolefin.

【0015】カーボンブラックとしては、高度な耐候性
を付与するために、粒子径が15〜50nmのファーネ
スブラックなどを用いることが好ましい。カーボンブラ
ックの配合量はポリオレフィンに対して0.5〜5重量
%であることが好ましい。
As the carbon black, it is preferable to use furnace black having a particle diameter of 15 to 50 nm in order to impart a high degree of weather resistance. The blending amount of carbon black is preferably 0.5 to 5% by weight with respect to the polyolefin.

【0016】これらの成分のほかに、押出加工性や絶縁
体としての一般的な特性を改善するために、必要に応じ
て滑剤、老化防止剤、銅害防止剤、紫外線吸収剤、着色
剤などの添加剤を添加してもよい。
In addition to these components, in order to improve extrusion processability and general properties as an insulator, a lubricant, an antioxidant, a copper damage inhibitor, an ultraviolet absorber, a colorant, etc. may be added, if necessary. You may add the additive of.

【0017】このうち滑剤としては、長期にわたって押
出安定性を確保するために一般的に使用される脂肪族ア
ミドや脂肪族金属塩が挙げられる。また、滑剤としてフ
ッ化ビニリデン系材料またはシリコーン系材料を添加し
てもよい。フッ化ビニリデン系材料としては、ポリフッ
化ビニリデン、フッ化ビニリデン−六フッ化プロピレン
共重合体、フッ化ビニリデン−六フッ化プロピレン−四
フッ化エチレン共重合体などが挙げられる。シリコーン
系材料としては、シリコーンオイル、シリコーンレジン
やシリコーンエラストマーを微粒子化したものなどが挙
げられる。特に、フッ化ビニリデン系材料またはシリコ
ーン系材料を添加した場合、驚くべきことに、得られる
絶縁体には塩分を含む水分などが付着しにくくなり、耐
トラッキング性を向上させる効果がある。フッ化ビニリ
デン系材料およびシリコーン系材料のうちでは耐トラッ
キング性を向上させる効果は前者の方が著しいので好ま
しい。このように耐トラッキング性を向上できる理由は
必ずしも明らかになっているわけではないが、これらの
添加剤はシラン架橋ポリエチレン相との適度な相溶性を
有することから、表面への塩分を含む水分などの付着を
有効に防止できるためであると推定される。これらの材
料の配合量は、ポリオレフィンに対して150〜200
0ppmであることが好ましい。150ppm未満では
滑剤としての効果が得られず、逆に2000ppmを超
えると絶縁体の物性を低下させる傾向がある。
Among them, examples of the lubricant include aliphatic amides and aliphatic metal salts which are generally used for ensuring extrusion stability for a long period of time. Further, a vinylidene fluoride material or a silicone material may be added as a lubricant. Examples of the vinylidene fluoride-based material include polyvinylidene fluoride, vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene copolymer, and the like. Examples of the silicone material include fine particles of silicone oil, silicone resin and silicone elastomer. In particular, when a vinylidene fluoride-based material or a silicone-based material is added, surprisingly, it becomes difficult for moisture containing salt to adhere to the resulting insulator, which has the effect of improving tracking resistance. Among the vinylidene fluoride-based materials and the silicone-based materials, the former is more effective in improving the tracking resistance, which is preferable. The reason why the tracking resistance can be improved is not always clear, but since these additives have an appropriate compatibility with the silane-crosslinked polyethylene phase, water containing salt on the surface, etc. It is presumed that this is because it is possible to effectively prevent the adherence of. The blending amount of these materials is 150 to 200 with respect to the polyolefin.
It is preferably 0 ppm. If it is less than 150 ppm, the effect as a lubricant cannot be obtained, and if it exceeds 2000 ppm, the physical properties of the insulator tend to be deteriorated.

【0018】なお、上述したシラノール縮合触媒および
その他の添加剤は、マスターバッチの形で添加すること
もできる。本発明における樹脂組成物は、その構成成分
であるポリオレフィン、有機シラン化合物、有機過酸化
物をシラノール縮合触媒、カーボンブラックなどのその
他の成分とともに混合して用いる場合のほかに、予め前
記ポリオレフィンに有機過酸化物の存在下で有機シラン
化合物を反応させて得られるシラン変性ポリオレフィン
と、前記のその他の成分とを混合して用いることもでき
る。
The silanol condensation catalyst and other additives described above can also be added in the form of a masterbatch. The resin composition of the present invention is a polyolefin, an organic silane compound, an organic peroxide, which is a constituent thereof, in addition to the case where the silanol condensation catalyst and other components such as carbon black are mixed and used, and the polyolefin is preliminarily organically mixed. A silane-modified polyolefin obtained by reacting an organic silane compound in the presence of a peroxide and the above-mentioned other components may be mixed and used.

【0019】[0019]

【実施例】以下、本発明を実施例に基づいて説明する。
原料成分として以下の材料を用意した。 直鎖状低密度ポリエチレン(1):昭和電工(株)製、
商品名B105FF、メルトインデックス(MI)=
0.8、コモノマーはブテン−1。 直鎖状低密度ポリエチレン(2):昭和電工(株)製、
商品名A220FF、MI=2.0、コモノマーはブテ
ン−1。 直鎖状低密度ポリエチレン(3):三菱化学(株)製、
商品名UF840、MI=1.5、コモノマーはブテン
−1。 高圧法低密度ポリエチレン(1):昭和電工(株)製、
商品名DF01S、MI=3.0。 高圧法低密度ポリエチレン(2):日本ユニカー(株)
製、商品名NUC9060、MI=1.2 有機シラン化合物として、ビニルトリメトキシシラン。
有機過酸化物として、ジクミルパーオキサイド。酸化防
止剤として、ペンタエリスリチル−テトラキス[3−
(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)
プロピオネート]、チバガイギー(株)製、商品名イル
ガノックス1010。シラノール縮合触媒として、ジブ
チル錫ジラウレート。フッ化ビニリデン系材料として、
フッ化ビニリデン−六フッ化プロピレン系共重合体:昭
和電工・デュポン(株)製、商品名バイトンM、または
ポリフッ化ビニリデン:三菱化学(株)製、商品名KY
NAR460。シリコーン系材料として、シリコーン微
粒子:トーレ・ダウコーニング・シリコーン(株)製、
商品名トレフィルE500。カーボンブラック:三菱化
学(株)製、カーボンブラック#30。
EXAMPLES The present invention will be described below based on examples.
The following materials were prepared as raw material components. Linear low-density polyethylene (1): Showa Denko KK,
Product name B105FF, melt index (MI) =
0.8, butene-1 as comonomer. Linear low-density polyethylene (2): Showa Denko KK,
Product name A220FF, MI = 2.0, butene-1 as comonomer. Linear low-density polyethylene (3): manufactured by Mitsubishi Chemical Corporation,
Product name UF840, MI = 1.5, comonomer is butene-1. High-pressure low-density polyethylene (1): Showa Denko KK,
Product name DF01S, MI = 3.0. High pressure low density polyethylene (2): Nippon Unicar Co., Ltd.
Product name: NUC9060, MI = 1.2 Vinyltrimethoxysilane as an organic silane compound.
Dicumyl peroxide as an organic peroxide. As an antioxidant, pentaerythrityl-tetrakis [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate], manufactured by Ciba Geigy Co., Ltd., trade name Irganox 1010. Dibutyltin dilaurate as a silanol condensation catalyst. As a vinylidene fluoride material,
Vinylidene fluoride-propylene hexafluoride-based copolymer: Showa Denko / Dupont Co., Ltd., trade name Viton M, or polyvinylidene fluoride: Mitsubishi Chemical Co., trade name KY
NAR460. As a silicone material, silicone fine particles: manufactured by Toray Dow Corning Silicone Co., Ltd.
Product name Trefill E500. Carbon black: Carbon black # 30 manufactured by Mitsubishi Chemical Corporation.

【0020】これらの材料を表1〜表3に示す配合割合
(重量%で表示)で配合し、実施例1〜14および比較
例1、2の混和物を得た。L/D=30、D=65φの
押出機を用い、押出機各部の温度をC1=150℃、C
2=200℃、C3=200℃、C4=200℃、ダイ
ス=200℃、ヘッド=200℃に設定し、スクリュー
回転数60rpmの条件で、各混和物をホッパーから投
入し、22mm2 の導体上に2.0mm厚の肉厚の絶縁
体を押出被覆してドラム巻きとし、約3000mの絶縁
電線を製造した。このときの電線構造は長手方向に2条
の突起体を連続的に設けた構造とした。
These materials were blended in the blending ratios (shown by weight%) shown in Tables 1 to 3 to obtain blends of Examples 1 to 14 and Comparative Examples 1 and 2. Using an extruder with L / D = 30 and D = 65φ, the temperature of each part of the extruder is C1 = 150 ° C., C
2 = 200 ° C., C3 = 200 ° C., C4 = 200 ° C., die = 200 ° C., head = 200 ° C., each mixture was put in from a hopper under the condition of screw rotation speed of 60 rpm, and a conductor of 22 mm 2 was placed. A 2.0 mm-thick insulator was extrusion-coated to form a drum and an insulated electric wire of about 3000 m was manufactured. The electric wire structure at this time was a structure in which two projections were continuously provided in the longitudinal direction.

【0021】架橋処理は、(1)夏場を想定した40℃
の雰囲気中、および(2)70℃の温水バス中、という
2つの条件でそれぞれ行った。そして、一定時間経過後
にドラムの胴面側に位置する絶縁電線の一部の外観を観
察して、突起体のつぶれの有無を調べた。また、十分な
架橋処理を施した後、JIS C3005に準拠して2
000回噴霧したときの電線表面の漏洩電流を測定し、
耐トラッキング性を評価した。これらの結果を表1〜3
に併記する。
The crosslinking treatment is (1) 40 ° C. assuming summer
In the atmosphere, and (2) in a hot water bath at 70 ° C., respectively. Then, after a certain period of time, the appearance of a part of the insulated wire located on the drum surface side of the drum was observed to check whether or not the protrusions were crushed. In addition, after sufficient cross-linking treatment, 2 according to JIS C3005
Measure the leakage current on the wire surface when sprayed 000 times,
The tracking resistance was evaluated. Tables 1 to 3 show these results.
Also described in.

【0022】[0022]

【表1】 [Table 1]

【0023】[0023]

【表2】 [Table 2]

【0024】[0024]

【表3】 [Table 3]

【0025】[0025]

【発明の効果】以上詳述したように本発明によれば、架
橋工程時の耐変形性を改善して突起体の寸法不良などを
防止し、さらには使用時の可撓性および耐トラッキング
性に優れた屋外用架橋ポリエチレン絶縁電線を提供でき
る。
As described above in detail, according to the present invention, the deformation resistance during the cross-linking process is improved to prevent dimensional defects of the protrusions, and the flexibility and tracking resistance during use are improved. An excellent cross-linked polyethylene insulated electric wire for outdoor use can be provided.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 直鎖状低密度ポリエチレン100〜40
重量%および高圧法低密度ポリエチレン0〜60重量%
からなりこれらの混和物の密度が0.915〜0.93
2であるポリオレフィンと、有機シラン化合物と、有機
過酸化物と、シラノール縮合触媒と、カーボンブラック
とを混和してなる樹脂組成物、または前記ポリオレフィ
ンに有機過酸化物の存在下で有機シラン化合物を反応さ
せて得られるシラン変性ポリオレフィンと、シラノール
縮合触媒と、カーボンブラックとを混和してなる樹脂組
成物を、導体上に押出被覆し架橋して絶縁体を形成した
ことを特徴とする屋外用架橋ポリエチレン絶縁電線。
1. A linear low density polyethylene 100 to 40.
% By weight and high pressure low density polyethylene 0-60% by weight
And the density of these admixtures is 0.915 to 0.93.
2, a resin composition obtained by mixing a polyolefin, an organic silane compound, an organic peroxide, a silanol condensation catalyst, and carbon black, or an organic silane compound in the presence of an organic peroxide in the polyolefin. A silane-modified polyolefin obtained by reaction, a silanol condensation catalyst, and a resin composition obtained by mixing carbon black, an outdoor cross-link characterized by extrusion coating on a conductor and cross-linking to form an insulator. Polyethylene insulated wire.
【請求項2】 前記ポリオレフィンが、直鎖状低密度ポ
リエチレン80〜40重量%および高圧法低密度ポリエ
チレン20〜60重量%からなることを特徴とする請求
項1記載の屋外用架橋ポリエチレン絶縁電線。
2. The outdoor cross-linked polyethylene insulated wire according to claim 1, wherein the polyolefin comprises linear low-density polyethylene 80 to 40% by weight and high-pressure low-density polyethylene 20 to 60% by weight.
【請求項3】 前記樹脂組成物が、さらにフッ化ビニリ
デン系材料またはシリコーン系材料を含有することを特
徴とする請求項1または2記載の屋外用架橋ポリエチレ
ン絶縁電線。
3. The outdoor cross-linked polyethylene insulated wire according to claim 1, wherein the resin composition further contains a vinylidene fluoride-based material or a silicone-based material.
【請求項4】 前記絶縁体が、長手方向に沿って連続的
に形成された少なくとも1条の突起体を有することを特
徴とする請求項1ないし3のいずれかに記載の屋外用架
橋ポリエチレン絶縁電線。
4. The outdoor cross-linked polyethylene insulation according to claim 1, wherein the insulator has at least one projection formed continuously along the longitudinal direction. Electrical wire.
JP24602595A 1995-09-25 1995-09-25 Cross-linked polyethylene insulated wire for outdoor use Expired - Fee Related JP3846922B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24602595A JP3846922B2 (en) 1995-09-25 1995-09-25 Cross-linked polyethylene insulated wire for outdoor use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24602595A JP3846922B2 (en) 1995-09-25 1995-09-25 Cross-linked polyethylene insulated wire for outdoor use

Publications (2)

Publication Number Publication Date
JPH0992035A true JPH0992035A (en) 1997-04-04
JP3846922B2 JP3846922B2 (en) 2006-11-15

Family

ID=17142336

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3846922B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001084837A (en) * 1999-09-17 2001-03-30 Kansai Electric Power Co Inc:The Electric insulation composition, and wire cable
JP2017026613A (en) * 2015-07-21 2017-02-02 北日本電線株式会社 Method and indicator for determining deterioration state

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001084837A (en) * 1999-09-17 2001-03-30 Kansai Electric Power Co Inc:The Electric insulation composition, and wire cable
JP2017026613A (en) * 2015-07-21 2017-02-02 北日本電線株式会社 Method and indicator for determining deterioration state

Also Published As

Publication number Publication date
JP3846922B2 (en) 2006-11-15

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