JPH0453044B2 - - Google Patents
Info
- Publication number
- JPH0453044B2 JPH0453044B2 JP60268155A JP26815585A JPH0453044B2 JP H0453044 B2 JPH0453044 B2 JP H0453044B2 JP 60268155 A JP60268155 A JP 60268155A JP 26815585 A JP26815585 A JP 26815585A JP H0453044 B2 JPH0453044 B2 JP H0453044B2
- Authority
- JP
- Japan
- Prior art keywords
- watertight
- vinyl
- parts
- ethylene
- weight
- 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 - Lifetime
Links
- 150000001875 compounds Chemical class 0.000 claims description 21
- 239000004020 conductor Substances 0.000 claims description 20
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 15
- 229920002554 vinyl polymer Polymers 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 11
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 10
- KRGNPJFAKZHQPS-UHFFFAOYSA-N chloroethene;ethene Chemical group C=C.ClC=C KRGNPJFAKZHQPS-UHFFFAOYSA-N 0.000 claims description 9
- 229920001038 ethylene copolymer Polymers 0.000 claims description 9
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000012212 insulator Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 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
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
Description
＜産業上の利用分野＞
本発明は、特に架空配電用電線として用いられ
るポリ塩化ビニル絶縁電線（以下、ビニル絶縁電
線と記す）に関するもので、水分による腐食の問
題を特殊な水密コンパウンドを用いることによつ
て解決したものである。
＜従来の技術＞
従来、この種の架空配電用電線においては、導
体への水の侵入を防止して導体腐食を防止する目
的で、水密コンパウンドを充填する方法が取られ
ている。
このような水密コンパウンドとしては、ゴムや
プラスチツク系の所謂ドライタイプの水密コンパ
ウンドが用いられている。具体的には、EVA（エ
チレン−酢酸ビニル共重合体）やEEA（エチレン
−エチルアクリレート共重合体）がよく用いられ
ているが、これはこれらの樹脂が導体及び絶縁体
であるポリエチレンに対して良好な接着性を有す
るという他に、種々のグレード品が揃つていて使
い易く、又加工し易いという点にある。
＜発明が解決しようとする問題点＞
しかしながら、本発明のように絶縁体がビニル
樹脂の絶縁電線においては、前述の利点がその
まゝ利用できないのが現状である。
そこで、本発明は、前述したようなEVAや
EEA系の水密コンパウンドをビニル絶縁電線の
水密コンパウンドとして利用することができるよ
うにすることにあり、特に、ビニル絶縁体との接
着性の改良と、併せて接続や端末処理における剥
離性をも十分に有するようにすることにある。
＜問題点を解決するための手段＞
本発明は、前述の問題点を解決するもので、水
密コンパウンドのベースポリマーとして塩化ビニ
ル−エチレン共重合体とEVA、EEA或いはポリ
エステル系接着剤の一種からなる組成物を用いる
ことにある。
即ち、第１番目の本発明は、平均重合度（ρ）
が400〜1300である塩化ビニル−エチレン共重合
体100重量部に対してエチレン−酢酸ビニル共重
合体或いはエチレン−エチルアクリレート共重合
体を10〜100重量部添加した水密コンパウンドが
撚線導体の少なくとも最外層に設けられ、更にポ
リ塩化ビニル絶縁層を有する水密ビニル絶縁電線
にある。
第２番目の本発明は、平均重合度（ρ）が400
〜1300である塩化ビニル−エチレン共重合体100
重量部に対してポリエステル系接着剤を10〜100
重量部添加した水密コンパウンドが撚線導体の少
なくとも最外層に設けられ、更にポリ塩化ビニル
絶縁層を有する水密ビニル絶縁電線にある。
そして、好ましくは、上記EVAのVA量（酢酸
ビニル含有量）及びEEAのEA量（エチルアクリ
レート含有量）を15〜50％とすることである。
又、この水密コンパウンドは撚線導体の間隙及
び導体外周面すべてに十分に充填することが好ま
しいが、少なくとも導体表面を覆うことによつて
目的は達せられる。
又、塩化ビニル−エチレン共重合体の平均重合
度を400〜1300とするのは、400未満であると夏
期等の高温時に水密コンパウンドが軟化流動して
しまうこと、剥離性が低下することが考えられる
ためであり、又1300を越えると逆に流動性に乏し
くなり撚線導体への充填が困難になると考えられ
るためである。
更に、EVA、EEAのVA量、EA量について
は、VA量、EA量が15％未満だと導体との接着
力が若干弱くなり、又50％を越えると高温（60℃
程度）での剥離性が悪くなり作業上問題があると
考えられるからである。
そして、塩化ビニル−エチレン共重合体と
EVA、EEA及びポリエステル系接着剤の組成割
合を前述するように定めたのは、EVA、EEA量
が塩化ビニル−エチレン共重合体100重量部に対
して10重量部未満であると導体との接着力が不十
分となり、又100重量部を越えると導体との接着
力が強くなり、剥離性が悪くなるためである。
又、ポリエステル系接着剤量を塩化ビニル−エ
チレン共重合体100重量部に対して10〜100重量部
としたのは、10重量部未満であると水密コンパウ
ンドの導体との接着力が目的とする接着力となら
ず、水密性が得られなくなり、又100重量部を越
えると接着力が大きくなり過ぎて、接続や口出し
作業の際の剥離性が悪くなるためである。尚、水
密コンパウンドのメルトインデツクスMIについ
ても作業性の点から15〜300（ｇ／10分）であるこ
とが望ましい。
以上のような組成の水密コンパウンドを用いる
ことによつて、十分な水密性と剥離性を兼ね備え
た水密ビニル絶縁電線が得られる。
＜実施例＞
第１表に示す水密コンパウンドを60mm2導体（19
本撚り）に充填し、ビニル絶縁層を被覆を施して
水密ビニル絶縁電線を製造し、この電線につい
て、水密試験、剥離試験、水密コンパウンド滴下
試験及び通電耐腐食試験を行つた。その結果を第
２表に示す。
尚、各試験は下記の方法で行つた。
水密試験：長さ２ｍの電線の片端に１気圧の水圧
を24時間加え、他端からの水漏れの有無を調べ
た。
剥離試験：電線皮剥ぎ器を用いて、絶縁体の皮剥
ぎを行ない、そのときの導体上の水密コンパウ
ンド残留の有無を室温と60℃の場合について調
べた。
水密コンパウンド滴下試験：長さ12cmの電線から
導体を３cm露出させ、恒温槽中に垂直に吊し、
80℃、24時間での水密コンパウンドの滴下の有
無を調べた。
通電耐腐食試験：電線の片端からマトソン氏液
（塩化アンモニウム、塩化銅を含む溶液で銅の
腐食を促進させる液）を注入し、導体温度が60
℃となるよう10時間通電、16時間常温でのヒー
トサイクルを60回繰り返した後の導体の変色を
調べた。
<Industrial Application Field> The present invention relates to polyvinyl chloride insulated wires (hereinafter referred to as vinyl insulated wires) used particularly as overhead power distribution wires, and the problem of corrosion caused by moisture can be solved by using a special watertight compound. This was solved by <Prior Art> Conventionally, this type of overhead power distribution wire is filled with a watertight compound for the purpose of preventing water from entering the conductor and preventing corrosion of the conductor. As such a watertight compound, a so-called dry type watertight compound made of rubber or plastic is used. Specifically, EVA (ethylene-vinyl acetate copolymer) and EEA (ethylene-ethyl acrylate copolymer) are often used, but these resins are different from polyethylene, which is a conductor and insulator. In addition to having good adhesive properties, it is easy to use and process as it is available in various grades. <Problems to be Solved by the Invention> However, in the case of an insulated wire in which the insulator is made of vinyl resin as in the present invention, the above-mentioned advantages cannot currently be utilized as is. Therefore, the present invention is directed to the above-mentioned EVA and
The objective is to enable EEA-based watertight compounds to be used as watertight compounds for vinyl insulated wires, and in particular, to improve adhesion to vinyl insulators, as well as to ensure sufficient peelability during connections and terminal treatments. The goal is to ensure that the <Means for Solving the Problems> The present invention solves the above-mentioned problems, and uses a vinyl chloride-ethylene copolymer as a base polymer for a watertight compound and a type of EVA, EEA, or polyester adhesive. The purpose is to use the composition. That is, the first invention is based on the average degree of polymerization (ρ)
A watertight compound prepared by adding 10 to 100 parts by weight of ethylene-vinyl acetate copolymer or ethylene-ethyl acrylate copolymer to 100 parts by weight of vinyl chloride-ethylene copolymer having a The watertight vinyl insulated wire is provided as the outermost layer and further has a polyvinyl chloride insulation layer. The second invention has an average degree of polymerization (ρ) of 400
~1300 vinyl chloride-ethylene copolymer 100
10 to 100 parts by weight of polyester adhesive
Parts by weight of a watertight compound are provided in at least the outermost layer of the stranded conductor, and the watertight vinyl insulated wire further has a polyvinyl chloride insulation layer. Preferably, the VA amount (vinyl acetate content) of EVA and the EA amount (ethyl acrylate content) of EEA are 15 to 50%. Although it is preferable that the watertight compound is sufficiently filled in all the gaps in the stranded conductor and the outer peripheral surface of the conductor, the purpose is achieved by covering at least the surface of the conductor. In addition, the reason why the average degree of polymerization of the vinyl chloride-ethylene copolymer is set to 400 to 1300 is that if it is less than 400, the watertight compound will soften and flow at high temperatures such as in summer, and the releasability will decrease. This is because it is thought that if it exceeds 1300, the fluidity will be poor and it will be difficult to fill the stranded wire conductor. Furthermore, regarding the amount of VA and EA of EVA and EEA, if the amount of VA and EA is less than 15%, the adhesive strength with the conductor will be slightly weak, and if it exceeds 50%, it will not be able to withstand high temperatures (60℃).
This is because it is thought that the removability will be poor at some points (degrees), causing problems in terms of work. And vinyl chloride-ethylene copolymer and
The composition ratios of EVA, EEA, and polyester adhesives were determined as described above because if the amount of EVA and EEA is less than 10 parts by weight based on 100 parts by weight of the vinyl chloride-ethylene copolymer, adhesion to the conductor will be poor. This is because the force will be insufficient, and if it exceeds 100 parts by weight, the adhesive force with the conductor will be strong and the peelability will be poor. In addition, the amount of polyester adhesive was set at 10 to 100 parts by weight per 100 parts by weight of the vinyl chloride-ethylene copolymer, because if it is less than 10 parts by weight, the adhesive strength of the watertight compound with the conductor is improved. This is because it does not have adhesive strength and watertightness cannot be obtained, and if it exceeds 100 parts by weight, the adhesive strength becomes too large and peelability during connection or opening work becomes poor. The melt index MI of the watertight compound is also preferably 15 to 300 (g/10 minutes) from the viewpoint of workability. By using a watertight compound having the composition as described above, a watertight vinyl insulated electric wire having both sufficient watertightness and peelability can be obtained. <Example> The watertight compound shown in Table 1 was applied to 60 mm 2 conductors (19
A watertight vinyl insulated wire was produced by filling the wire with a vinyl insulating layer and carrying out a watertightness test, a peel test, a watertight compound dripping test, and an electrical corrosion resistance test. The results are shown in Table 2. Incidentally, each test was conducted in the following manner. Watertight test: A water pressure of 1 atm was applied to one end of a 2m long electric wire for 24 hours to check for water leakage from the other end. Peeling test: The insulator was stripped using a wire stripper, and the presence or absence of watertight compound remaining on the conductor was examined at room temperature and at 60°C. Watertight compound dropping test: 3 cm of conductor is exposed from a 12 cm long electric wire, hung vertically in a thermostatic chamber,
The presence or absence of dripping of the watertight compound was investigated at 80°C for 24 hours. Current-carrying corrosion resistance test: Inject Matson's solution (a solution containing ammonium chloride and copper chloride that accelerates copper corrosion) from one end of the wire, and test the conductor at a temperature of 60°C.
The discoloration of the conductor was examined after repeating a heat cycle of 60 times in which the conductor was heated for 10 hours and then kept at room temperature for 16 hours.
【表】【table】
【表】【table】
【表】
＜発明の効果＞
以上の結果から明らかなように、本発明の水密
ビニル絶縁電線は、水密性、剥離性、滴下試験、
腐食試験のいずれにおいても、十分な特性を有し
ていることが判る。
よつて、本発明によれば、ポリ塩化ビニル絶縁
電線を用いた水密架空配電用電線として極めて優
れた水密ビニル絶縁電線を提供するとができる。[Table] <Effects of the Invention> As is clear from the above results, the watertight vinyl insulated wire of the present invention has excellent watertightness, peelability, drip test,
It can be seen that it has sufficient properties in all corrosion tests. Therefore, according to the present invention, it is possible to provide a watertight vinyl insulated wire that is extremely excellent as a watertight overhead power distribution wire using a polyvinyl chloride insulated wire.
Claims (1)
ニル−エチレン共重合体100重量部に対してエチ
レン−酢酸ビニル共重合体或いはエチレン−エチ
ルアクリレート共重合体を10〜100重量部添加し
た水密コンパウンドが撚線導体の少なくとも最外
層に設けられ、更にポリ塩化ビニル絶縁層を有す
る水密ビニル絶縁電線。 ２ 平均重合度（ρ）が400〜1300である塩化ビ
ニル−エチレン共重合体100重量部に対してポリ
エステル系接着剤を10〜100重量部添加した水密
コンパウンドが撚線導体の少なくとも最外層に設
けられ、更にポリ塩化ビニル絶縁層を有する水密
ビニル絶縁電線。 ３ 前記エチレン−酢酸ビニル共重合体の酢酸ビ
ニル含有量が15〜50％である特許請求の範囲第１
項記載の水密ビニル絶縁電線。 ４ 前記エチレン−エチルアクリレート共重合体
のエチルアクリレート含有量が15〜50％である特
許請求の範囲第１項記載の水密ビニル絶縁電線。[Claims] 1. 10 to 100 parts by weight of a vinyl chloride-ethylene copolymer having an average degree of polymerization (ρ) of 400 to 1300, and 10 to 10 parts of an ethylene-vinyl acetate copolymer or an ethylene-ethyl acrylate copolymer. A watertight vinyl insulated electric wire, which is provided with a watertight compound added in an amount of 100 parts by weight on at least the outermost layer of a stranded conductor, and further has a polyvinyl chloride insulation layer. 2 A watertight compound prepared by adding 10 to 100 parts by weight of a polyester adhesive to 100 parts by weight of a vinyl chloride-ethylene copolymer with an average degree of polymerization (ρ) of 400 to 1300 is provided at least on the outermost layer of the stranded wire conductor. Watertight vinyl insulated wire with a polyvinyl chloride insulation layer. 3. Claim 1, wherein the vinyl acetate content of the ethylene-vinyl acetate copolymer is 15 to 50%.
Watertight vinyl insulated wire as described in Section 1. 4. The watertight vinyl insulated wire according to claim 1, wherein the ethylene-ethyl acrylate copolymer has an ethyl acrylate content of 15 to 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60268155A JPS62128403A (en) | 1985-11-28 | 1985-11-28 | Water tight polyvinyl chloride insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60268155A JPS62128403A (en) | 1985-11-28 | 1985-11-28 | Water tight polyvinyl chloride insulated wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62128403A JPS62128403A (en) | 1987-06-10 |
| JPH0453044B2 true JPH0453044B2 (en) | 1992-08-25 |
Family
ID=17454660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60268155A Granted JPS62128403A (en) | 1985-11-28 | 1985-11-28 | Water tight polyvinyl chloride insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62128403A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS64607A (en) * | 1987-06-23 | 1989-01-05 | Fujikura Ltd | Watertight pvc-insulated electric wire and cable |
| JPS6452306A (en) * | 1987-08-21 | 1989-02-28 | Yazaki Corp | Power cable |
-
1985
- 1985-11-28 JP JP60268155A patent/JPS62128403A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62128403A (en) | 1987-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |