JP2003141943A - Power cable - Google Patents
Power cableInfo
- Publication number
- JP2003141943A JP2003141943A JP2002143346A JP2002143346A JP2003141943A JP 2003141943 A JP2003141943 A JP 2003141943A JP 2002143346 A JP2002143346 A JP 2002143346A JP 2002143346 A JP2002143346 A JP 2002143346A JP 2003141943 A JP2003141943 A JP 2003141943A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- water
- tape
- shielding
- power cable
- 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
Links
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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、遮水構造の電力
ケーブルに関し、金属遮蔽層を兼ねた遮水テープを用い
ることにより、製造コストの低減を図ったものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cable having a water-blocking structure and is intended to reduce the manufacturing cost by using a water-blocking tape which also serves as a metal shielding layer.
【０００２】[0002]
【従来の技術】高圧電力ケーブルとして、架橋ポリエチ
レン絶縁ケーブル（ＣＶケーブル）が実用されている。
このＣＶケーブルでは、絶縁体内に水トリーが生じ、絶
縁性が低下することを防止するために、金属被あるいは
シースの内側に遮水テープを設け、水の浸入を防止する
ことが行われている。また、このケーブルが地絡した際
に安全に地絡電流を流すために、銅テープを巻き回して
なる金属遮蔽層が設けられている。2. Description of the Related Art A cross-linked polyethylene insulated cable (CV cable) has been put into practical use as a high-voltage power cable.
In this CV cable, in order to prevent a water tree from being generated in the insulator and deteriorating the insulating property, a water blocking tape is provided inside the metal cover or the sheath to prevent water from entering. . In addition, a metal shielding layer formed by winding a copper tape is provided in order to safely flow a ground fault current when the cable is ground-faulted.
【０００３】上記遮水テープとしては、鉛箔の両面に熱
溶融性接着層を設けた構造のものが使用され、これをケ
ーブルコアに縦添え、包被し、この上に押出被覆された
シースと遮水テープとが押出被覆時の熱により溶着する
ようになっている。As the water-blocking tape, a tape having a structure in which a heat-melting adhesive layer is provided on both sides of a lead foil is used, which is vertically attached to a cable core, covered, and extrusion-coated on the sheath. The water-blocking tape and the water-blocking tape are welded to each other by heat during extrusion coating.
【０００４】ところで、この構造のＣＶケーブルでは、
銅テープからなる金属遮蔽層と遮水テープからなる遮水
層を設けたものであるので、材料費が高くつき、加工費
も高くなる不都合がある。このため、金属遮蔽層を遮水
テープで兼ねるようにして、製造コストを削減する試み
もあるが、遮水テープをなす鉛箔は電気抵抗が高く、遮
蔽性に劣るという欠点がある。By the way, in the CV cable of this structure,
Since the metal shielding layer made of the copper tape and the water shielding layer made of the water shielding tape are provided, the material cost is high and the processing cost is high. Therefore, there is an attempt to reduce the manufacturing cost by using the water shielding tape as the metal shielding layer as well, but the lead foil forming the water shielding tape has a drawback that it has a high electric resistance and a poor shielding property.
【０００５】[0005]
【発明が解決しようとする課題】よって、本発明におけ
る課題は、金属遮蔽層を不要にでき、しかも十分な遮蔽
性と高い遮水性を有し、安価に製造することができる遮
水構造の電力ケーブルを得ることにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the need for a metal shielding layer, have sufficient shielding property and high water shielding property, and have a water shielding structure which can be manufactured at low cost. To get the cable.
【０００６】[0006]
【課題を解決するための手段】かかる課題は、ケーブル
コア上に、半導電層、アルミニウム層、補強層及び接着
層を順次積層一体化してなる遮水テープを、その半導電
層がケーブルコア側になるように縦添え、包被し、この
上にシースを設け、このシースが遮水テープの接着層と
溶着した電力ケーブルによって解決できる。上記ケーブ
ルコアには金属遮蔽層を設ける必要はない。The object of the present invention is to provide a water-blocking tape in which a semiconductive layer, an aluminum layer, a reinforcing layer and an adhesive layer are sequentially laminated and integrated on a cable core. It can be solved by a power cable in which the sheath is provided vertically, is wrapped so that the sheath is provided on the sheath, and the sheath is welded to the adhesive layer of the water blocking tape. It is not necessary to provide a metal shield layer on the cable core.
【０００７】また、上記遮水テープのアルミニウム層の
厚みを、１５〜２００μｍとすることで、十分な遮蔽
性、遮水性が得られるとともに、機械的強度、加工性も
良好となる。さらに、ケーブルコアの遮水テープと接す
る最外層を、体積固有抵抗が１０6Ω−ｃｍ以下である
半導電性クッション層で構成することで、遮水テープと
の隙間がなくなり、電気的接触が良くなり、電界傾度が
緩和されて好ましい。Further, by setting the thickness of the aluminum layer of the water-blocking tape to be 15 to 200 μm, sufficient water-blocking property and water-blocking property can be obtained, and mechanical strength and workability are also improved. Furthermore, by forming the outermost layer of the cable core, which is in contact with the water blocking tape, with a semi-conductive cushion layer having a volume resistivity of 10 6 Ω-cm or less, there is no gap between the water blocking tape and electrical contact. This is preferable because it is improved and the electric field gradient is relaxed.
【０００８】[0008]
【発明の実施の形態】以下、本発明を、その実施形態に
基づいて詳しく説明する。図１は、本発明の電力ケーブ
ルの一例を示すもので、図中符号１はケーブルコアを示
す。このケーブルコア１は、例えば導体上に半導電テー
プを巻き回し、この上に内部半導電層、ポリエチレン、
架橋ポリエチレン、エチレン−プロピレンゴム、ブチル
ゴムなどからなる絶縁体、外部半導電層および半導電性
クッション層を順次設けてなるものである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on its embodiments. FIG. 1 shows an example of a power cable of the present invention, in which reference numeral 1 denotes a cable core. In this cable core 1, for example, a semiconductive tape is wound around a conductor, and an inner semiconductive layer, polyethylene,
An insulating body made of cross-linked polyethylene, ethylene-propylene rubber, butyl rubber, etc., an external semiconductive layer and a semiconductive cushion layer are sequentially provided.
【０００９】ケーブルコア１の最外層の半導電性クッシ
ョン層は、エチレン−酢酸ビニル共重合体などのポリマ
ーにカーボンブラックを配合した半導電性樹脂組成物を
発泡させた発泡半導電性樹脂テープ等を巻き回したもの
で、その体積固有抵抗が１０ 6Ω−ｃｍ以下となってい
る。この体積固有抵抗が１０6Ω−ｃｍを越えると電界
緩和効果が不足する。この半導電性クッション層は、こ
の上に設けられる遮水テープとの密着性を高め、遮水テ
ープとの間の隙間をなくし、部分放電を防止し、電界傾
度を緩和するするものである。[0009] The outermost layer of the cable core 1 is a semi-conductive cushion.
The coating layer is a polymer such as ethylene-vinyl acetate copolymer.
A semiconductive resin composition in which carbon black is blended
Wrapped with foamed semi-conductive resin tape
And its volume resistivity is 10 6Ω-cm or less
It This volume resistivity is 106Electric field when exceeding Ω-cm
The mitigation effect is insufficient. This semi-conductive cushion layer
Improve the adhesion with the water-blocking tape provided on the
Eliminates the gap between the
It is to relax the degree.
【００１０】このケーブルコア１上には、金属遮蔽層を
兼ねる遮水テープ２が縦添えされ、ケーブルコア１を包
被している。この遮水テープ２は、図２に示すように、
半導電層３、アルミニウム層４、補強層５および接着層
６を順次積層一体化してなるテープである。On the cable core 1, a water blocking tape 2 which also serves as a metal shielding layer is vertically attached to cover the cable core 1. This water-blocking tape 2 is, as shown in FIG.
It is a tape in which a semiconductive layer 3, an aluminum layer 4, a reinforcing layer 5 and an adhesive layer 6 are sequentially laminated and integrated.
【００１１】上記半導電層３は、ケーブルコア１の最外
層の半導電性クッション層との電気的接触を良くし、ア
ルミニウム層４を機械的に保護するためのものであり、
その体積固有抵抗が１０6Ω−ｃｍ以下の熱可塑性樹脂
組成物からなるものであればすべて使用できる。具体的
には、塩化ビニル−酢酸ビニル共重合体、ポリ塩化ビニ
ル、エチレン−酢酸ビニル共重合体、エチレン−エチル
アクリレート共重合体、ポリエチレンなどの１種または
２種以上の混合物に導電性カーボンブラックを分散させ
た半導電性樹脂組成物が用いられる。この半導電層３の
体積固有抵抗が１０6Ω−ｃｍを越えると電界緩和効果
が少なくなる。The semiconductive layer 3 is for improving electrical contact with the outermost semiconductive cushion layer of the cable core 1 and mechanically protecting the aluminum layer 4.
Any material can be used as long as it is made of a thermoplastic resin composition having a volume resistivity of 10 6 Ω-cm or less. Specifically, a conductive carbon black is added to one or a mixture of two or more of vinyl chloride-vinyl acetate copolymer, polyvinyl chloride, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polyethylene and the like. A semiconductive resin composition in which is dispersed is used. When the volume resistivity of the semiconductive layer 3 exceeds 10 6 Ω-cm, the electric field relaxation effect is reduced.
【００１２】この半導電層３の厚みは、２０〜１５０μ
ｍ、好ましくは３０〜１２０μｍとされ、２０μｍ未満
ではフィルム化の際にピンホールを生じやすく、１５０
μｍを越えるとフィルムの生産速度が遅くなり、高価と
なる。半導電層３の形成は、上述の半導電性樹脂組成物
を溶解した樹脂液をアルミニウム層４に塗布、乾燥する
方法、あるいは予めフィルム状に成形したのち、このフ
ィルムを加熱積層する方法、導電性の接着剤を塗布して
一体化する方法などによって行われる。The thickness of the semiconductive layer 3 is 20 to 150 μm.
m, preferably 30 to 120 μm. If it is less than 20 μm, pinholes are apt to occur during film formation,
If it exceeds μm, the production rate of the film becomes slow and the film becomes expensive. The semiconductive layer 3 is formed by coating the aluminum layer 4 with a resin solution in which the above-mentioned semiconductive resin composition is dissolved and drying it, or by forming it into a film in advance and then heating and laminating this film. It is carried out by a method of applying a sexual adhesive and integrating them.
【００１３】アルミニウム層４は、アルミニウム、アル
ミニウム合金からなる伸びの良い圧延箔からなり、その
厚みはＪＣＳ規格に定められた地絡容量計算に準じて定
められ、通常１５〜２００μｍ、好ましくは４０〜１２
０μｍとされる。この厚みが１５μｍ未満では、機械的
強度が低く、遮蔽性能が不足し、かつ貼り合わせ作業中
に外傷を受けて、ピンホールが生じ、遮水性を失うこと
になる。２００μｍを越えると、遮水テープ２自体が硬
くなり、加工性が劣り、作業性が低下する。The aluminum layer 4 is made of a rolled foil having a good elongation made of aluminum or aluminum alloy, and the thickness thereof is determined according to the ground fault capacity calculation defined in the JCS standard, and is usually 15 to 200 μm, preferably 40 to. 12
It is set to 0 μm. If the thickness is less than 15 μm, the mechanical strength is low, the shielding performance is insufficient, and external damage is caused during the bonding work, resulting in pinholes and loss of water shielding property. If it exceeds 200 μm, the water-blocking tape 2 itself becomes hard, resulting in poor workability and poor workability.
【００１４】ここで、アルミニウムを選択した理由は、
導電性が高く、軽量であり、展性に優れており、安価で
あるからである。また、このアルミニウム層４をなすア
ルミニウム箔としては、その耐食性を高めるために、そ
の両面もしくは補強層５側の表面（シース側）に、クロ
メート処理、アルマイト処理、ベーマイト処理などの表
面処理を施して、厚み０．５〜１０μｍの耐食層を形成
したものを用いることもできる。Here, the reason why aluminum is selected is
This is because it has high conductivity, is lightweight, has excellent malleability, and is inexpensive. The aluminum foil forming the aluminum layer 4 is subjected to surface treatment such as chromate treatment, alumite treatment, boehmite treatment on its both surfaces or the surface (sheath side) on the reinforcing layer 5 side in order to improve its corrosion resistance. It is also possible to use one having a corrosion resistant layer having a thickness of 0.5 to 10 μm.
【００１５】補強層５は、遮水テープ２全体の機械的強
度を担うもので、例えばポリエチレンテレフタレート、
ポリ塩化ビニル、ポリアミド、ポリカーボネイト、ポリ
イミドアミド、ポリスルホンなどからなる厚さ２０〜１
００μｍ、好ましくは３０〜８０μｍのフィルムであ
る。この厚さが２０μｍ未満では機械的強度が不足し、
１００μｍを越えると、加工性が低下し、作業性が劣
る。これらのフィルムは接着剤を介してアルミニウム層
４に貼り合わせられるか、あるいは加熱してアルミニウ
ム層４に溶着することよって補強層５とされる。The reinforcing layer 5 is responsible for the mechanical strength of the entire water shield tape 2, and is made of, for example, polyethylene terephthalate.
Thickness 20 to 1 made of polyvinyl chloride, polyamide, polycarbonate, polyimide amide, polysulfone, etc.
The film has a thickness of 00 μm, preferably 30 to 80 μm. If this thickness is less than 20 μm, the mechanical strength is insufficient,
If it exceeds 100 μm, the workability is lowered and the workability is deteriorated. These films are bonded to the aluminum layer 4 via an adhesive, or are heated and welded to the aluminum layer 4 to form the reinforcing layer 5.
【００１６】接着層６は、熱可塑性樹脂からなる厚み３
０〜１５０μｍ、好ましくは３５〜８０μｍの層であ
り、後述するシースの押出被覆時の熱で軟化溶融し、シ
ースと接合一体化するとともに、この遮水テープ２の重
ね合わせ部分において半導電層３と溶着し、接合一体化
して、内部のケーブルコア１を封入するものである。こ
の接着層６の厚さが３０μｍ未満では接着力不足とな
り、１５０μｍを越えると接着層を透過する水分が増加
し、また高価となる。The adhesive layer 6 is made of a thermoplastic resin and has a thickness 3
It is a layer having a thickness of 0 to 150 μm, preferably 35 to 80 μm, and is softened and melted by heat during extrusion coating of a sheath to be described later to be joined and integrated with the sheath, and at the overlapping portion of the water-impervious tape 2, the semiconductive layer 3 is formed. And the cable core 1 inside is sealed by fusion and welding. When the thickness of the adhesive layer 6 is less than 30 μm, the adhesive strength becomes insufficient, and when it exceeds 150 μm, the amount of water permeating the adhesive layer increases and the cost becomes high.
【００１７】接着層６をなす熱可塑性樹脂の具体的なも
のとしては、熱可塑性ポリエステル樹脂、塩化ビニル−
酢酸ビニル共重合体、ポリ塩化ビニル、エチレン−酢酸
ビニル共重合体、エチレン−エチルアクリレート共重合
体、マレイン酸変性ポリエチレン、マレイン酸変性エチ
レン−酢酸ビニル共重合体、マレイン酸変性エチレン−
エチルアクリレート共重合体、エチレン−メタクリル酸
共重合体などの分子内にカルボキシル基を有するものの
１種または２種以上の混合物が用いられる。Specific examples of the thermoplastic resin forming the adhesive layer 6 include thermoplastic polyester resin and vinyl chloride.
Vinyl acetate copolymer, polyvinyl chloride, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, maleic acid modified polyethylene, maleic acid modified ethylene-vinyl acetate copolymer, maleic acid modified ethylene-
One or a mixture of two or more of those having a carboxyl group in the molecule such as ethyl acrylate copolymer and ethylene-methacrylic acid copolymer is used.
【００１８】このような構造の遮水テープ２は、その半
導電層３がケーブルコア１に接するようにして、ケーブ
ルコア１に縦添えされ、遮水テープ２の両側縁部を重ね
合わせ幅１０〜２５ｍｍで、互いに重ね合わせて包被さ
れる。この状態の遮水テープ２の上には、シース７が被
覆されてこの例の電力ケーブルとなっている。The waterproof tape 2 having such a structure is vertically attached to the cable core 1 so that the semiconductive layer 3 is in contact with the cable core 1, and both side edges of the waterproof tape 2 are overlapped with each other to have a width 10 ~ 25 mm, wrapped over each other. The water shield tape 2 in this state is covered with the sheath 7 to form the power cable of this example.
【００１９】シース７は、ポリエチレン、ポリ塩化ビニ
ルなどの樹脂やクロロプレンゴムを公知の押出被覆法に
よって被覆したもので、この押出被覆時の熱により、遮
水テープ２の重ね合わせ部分が溶着、一体化して遮水テ
ープ２がケーブルコア１を緊密に内包した状態で水密的
に封じられ、かつ遮水テープ２の接着層６がシース７と
溶着、一体化する。The sheath 7 is formed by coating a resin such as polyethylene or polyvinyl chloride or chloroprene rubber by a known extrusion coating method. Due to the heat at the time of this extrusion coating, the overlapped portion of the water blocking tape 2 is welded and integrally formed. The water-blocking tape 2 is water-tightly sealed in a state where the water-blocking tape 2 tightly encloses the cable core 1, and the adhesive layer 6 of the water-blocking tape 2 is welded and integrated with the sheath 7.
【００２０】このような構造の電力ケーブルにあって
は、遮水テープ２の金属層として導電性の良いアルミニ
ウムを用い、その厚みを１５〜２００μｍ、好ましくは
３０〜１００μｍとしたので、十分な遮蔽性能を有する
ものとなる。一般に、アルミニウムは、耐食性がよくな
いと言われているが、これは各種イオンを含んだ液体状
の水分と直接接触する場合であり、気体状の水分に対し
ては腐食しないことが判明している。In the power cable having such a structure, aluminum having good conductivity is used as the metal layer of the water blocking tape 2 and the thickness thereof is set to 15 to 200 μm, preferably 30 to 100 μm, so that sufficient shielding is achieved. It has performance. In general, aluminum is said to have poor corrosion resistance, but this is when it comes into direct contact with liquid water containing various ions, and it has been found that it does not corrode against gaseous water. There is.
【００２１】このような事実から、この例の電力ケーブ
ルでは遮水テープ２のアルミニウム層３は、厚いシース
７および接着層６、補強層５で外部と遮断されているの
で、アルミニウム層３に至る水分は少量で、かつ気体状
であるので、高い耐食性を示し、遮水性能も優れたもの
となる。From such a fact, in the power cable of this example, the aluminum layer 3 of the water blocking tape 2 is shielded from the outside by the thick sheath 7, the adhesive layer 6, and the reinforcing layer 5, and thus reaches the aluminum layer 3. Since it has a small amount of water and is in a gaseous state, it exhibits high corrosion resistance and excellent water impermeability.
【００２２】このため、遮水テープ２のアルミニウム層
３が金属遮蔽層としての機能を十分に果たし、従来のケ
ーブルコア１上に銅テープを巻き回して形成した金属遮
蔽層が不要となり、この銅テープからなる金属遮蔽層を
固定する押さえ巻きテープも削減でき、材料費、加工費
を低減できる。Therefore, the aluminum layer 3 of the water shield tape 2 sufficiently fulfills the function as a metal shield layer, and the conventional metal shield layer formed by winding a copper tape around the cable core 1 becomes unnecessary. It is also possible to reduce the press-winding tape that fixes the metal shielding layer made of tape, and reduce the material cost and the processing cost.
【００２３】また、遮水テープ２の半導電層３、アルミ
ニウム層３、補強層４および接着層６が完全に一体化し
ているため、機械的強度、耐水性が優れ、それ自身の遮
水性が高く、しかもケーブルコア１がこの遮水テープ２
で水密的に完全に封止された構造となるため、電力ケー
ブルとしての遮水性も高いものとなる。さらに、従来の
鉛箔を使用した遮水テープでは、鉛の有害性が問題とな
るが、この遮水テープ２では、そのような不安もない。Further, since the semiconductive layer 3, the aluminum layer 3, the reinforcing layer 4 and the adhesive layer 6 of the water-blocking tape 2 are completely integrated, mechanical strength and water resistance are excellent, and the water-blocking property itself is excellent. It is expensive, and the cable core 1 is this waterproof tape 2.
Since the structure is completely watertightly sealed, the water impermeability as a power cable is also high. Further, in the water blocking tape using the conventional lead foil, the harmfulness of lead poses a problem, but in the water blocking tape 2, there is no such anxiety.
【００２４】以下、具体例を示す。
（例１）ポリ塩化ビニルに導電性カーボンブラックを分
散し、体積固有抵抗１０5Ω−ｃｍの半導電性樹脂組成
物からなる厚み４０μｍの半導電層３、厚み５０μｍの
アルミニウム箔からなるアルミニウム層４、厚み８０μ
ｍのポリエチレンテレフタレートフィルムからなる補強
層５およびエチレン−酢酸ビニル共重合体からなる厚み
８０μｍの接着層６からなる遮水テープ２を用意した。A specific example will be shown below. (Example 1) A conductive carbon black is dispersed in polyvinyl chloride, and a semiconductive layer 3 having a thickness of 40 μm is made of a semiconductive resin composition having a volume resistivity of 10 5 Ω-cm, and an aluminum layer is made of an aluminum foil having a thickness of 50 μm. 4, thickness 80μ
A waterproof tape 2 comprising a reinforcing layer 5 made of polyethylene terephthalate film of m and an adhesive layer 6 made of ethylene-vinyl acetate copolymer and having a thickness of 80 μm was prepared.
【００２５】この遮水テープ２を、架橋ポリエチレンか
らなる絶縁体を有し、エチレン−酢酸ビニル共重合体に
カーボンブラックを配合し、発泡させた発泡半導電性樹
脂テープを巻回してなる体積固有抵抗５×１０4Ω−ｃ
ｍの半導電性クッション層を最外層に有するケーブルコ
ア１に対して、その半導電層３がケーブルコア１に接す
るように、縦添えして包被した。この時、遮水テープ２
の重ね合わせ部分の幅は、２０ｍｍとした。ついで、こ
の上にポリ塩化ビニルを押出被覆してシース７を形成し
て、電力ケーブルとした。This water-blocking tape 2 has an insulator made of cross-linked polyethylene, is mixed with carbon black in an ethylene-vinyl acetate copolymer, and is wound with a foamed semiconductive resin tape which is foamed and has a specific volume. Resistance 5 × 10 4 Ω-c
A cable core 1 having a semiconductive cushion layer of m as an outermost layer was vertically attached and covered so that the semiconductive layer 3 was in contact with the cable core 1. At this time, waterproof tape 2
The width of the overlapping portion of was set to 20 mm. Then, polyvinyl chloride was extrusion-coated on this to form a sheath 7, which was used as a power cable.
【００２６】この電力ケーブルを約３０ｃｍ採取し、ケ
ーブルコアを取り除き、内部が空洞の遮水層付きビニル
シースとした。このものに内部に湿度センサを取り付
け、両端部を密閉して試料とした。この試料を６０℃の
温水中に３０日間浸漬したが、内部の湿度の上昇は見ら
れなかった。また、この電力ケーブルの地絡試験を行っ
たところ、十分な遮蔽性能を有することがわかった。About 30 cm of this power cable was sampled, the cable core was removed, and a vinyl sheath with a hollow inner layer was provided. A humidity sensor was attached to the inside of this product, and both ends were sealed to obtain a sample. This sample was immersed in warm water of 60 ° C. for 30 days, but no increase in internal humidity was observed. In addition, a ground fault test of this power cable revealed that it has sufficient shielding performance.
【００２７】（例２〜例１５）例１において、遮水テー
プ２の半導電層３、アルミニウム層４、補強層５および
接着層６を、表１ないし表３に示すものに変更して１４
種の遮水テープ２を作製し、これを用いて例１と同様に
して電力ケーブルを作製し、同様の試験を行って、その
遮水性能、遮蔽性能を評価した。結果を表１ないし表３
に示す。(Examples 2 to 15) In Example 1, the semiconductive layer 3, the aluminum layer 4, the reinforcing layer 5 and the adhesive layer 6 of the water shield tape 2 were changed to those shown in Tables 1 to 3 and 14
A seed water blocking tape 2 was manufactured, and a power cable was manufactured in the same manner as in Example 1 and the same test was performed to evaluate the water blocking performance and the shielding performance. The results are shown in Tables 1 to 3
Shown in.
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【表２】 [Table 2]
【００３０】[0030]
【表３】 [Table 3]
【００３１】表１ないし表３において、「ＣＢ」は、カ
ーボンブラックを、「ＰＶＣ」は、ポリ塩化ビニルを、
「ＰＥＴ」は、ポリエチレンテレフタレートを、「ＰＶ
Ａｃ」は、塩化ビニル−酢酸ビニル共重合体を、「ＥＶ
Ａ」は、エチレン−酢酸ビニル共重合体を、「ＥＥＡ」
は、エチレン−エチルアクリレート共重合体を示す。In Tables 1 to 3, "CB" means carbon black, "PVC" means polyvinyl chloride,
"PET" is polyethylene terephthalate, "PV
"Ac" is a vinyl chloride-vinyl acetate copolymer obtained by "EV
"A" is ethylene-vinyl acetate copolymer, "EEA"
Shows an ethylene-ethyl acrylate copolymer.
【００３２】また、「Ｍ−ＥＶＡ」は、マレイン酸変性
エチレン−酢酸ビニル共重合体を、「Ｍ−ＥＥＡ」は、
マレイン酸変性エチレン−エチルアクリレート共重合体
を、「ＰＡ」は、ポリアミドを、「ＰＣ」は、ポリカー
ボネイトを示す。また、例１４では、アルミニウム箔に
変えて銅箔を使用し、例１５ではアルミニウム箔に変え
て鉛箔を使用した。"M-EVA" is a maleic acid-modified ethylene-vinyl acetate copolymer, and "M-EEA" is
Maleic acid-modified ethylene-ethyl acrylate copolymer, "PA" indicates polyamide, and "PC" indicates polycarbonate. In Example 14, a copper foil was used instead of the aluminum foil, and in Example 15, a lead foil was used instead of the aluminum foil.
【００３３】[0033]
【発明の効果】以上説明したように、この発明の電力ケ
ーブルにあっては、高い遮蔽性能と遮水性能とを併せ有
する遮水テープを用いたので、従来の銅テープの巻回層
などの金属遮蔽層を不要にでき、材料費、加工費の削減
が可能となる。また、遮水性能も高いものとなる。ま
た、本発明の遮水テープにあっては、高い遮蔽性能なら
びに高い遮水性能を有し、可撓性も高く、取り扱いが容
易であり、ケーブルコアへの縦添え作業も効率よく行え
る。As described above, in the electric power cable of the present invention, the water shielding tape having both high shielding performance and water shielding performance is used. The metal shielding layer can be eliminated, and the material cost and processing cost can be reduced. In addition, the water impermeability is also high. In addition, the water shielding tape of the present invention has high shielding performance and high water shielding performance, has high flexibility, is easy to handle, and can be efficiently attached vertically to the cable core.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の電力ケーブルに一例を示す概略断面図
である。FIG. 1 is a schematic cross-sectional view showing an example of a power cable of the present invention.
【図２】本発明で用いられる遮水テープの一例を示す概
略断面図である。FIG. 2 is a schematic cross-sectional view showing an example of the water blocking tape used in the present invention.
１…ケーブルコア、２…遮水テープ、３…半導電層、４
…アルミニウム層、５…補強層、６…接着層、７…シー
ス。1 ... Cable core, 2 ... Water-blocking tape, 3 ... Semi-conductive layer, 4
... Aluminum layer, 5 ... Reinforcing layer, 6 ... Adhesive layer, 7 ... Sheath.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 淳 東京都江東区木場一丁目５番１号 株式会 社フジクラ内 (72)発明者 重年 生雄 千葉県富津市新富42−１ 株式会社フジク ラ富津事業所内 (72)発明者 平澤 隆行 東京都江東区木場一丁目５番１号 株式会 社フジクラ内 (72)発明者 内田 克己 愛知県名古屋市緑区大高町字北関山20番地 の１ 中部電力株式会社電力技術研究所内 (72)発明者 小林 真一 愛知県名古屋市東区東新町１番地 中部電 力株式会社内 Ｆターム(参考） 5G313 FA01 FB06 FC03 FD01 FD02 FD05 FD09 FD10 FD13 FD14 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Jun Suzuki 1-5-1 Kiba Stock Market, Koto-ku, Tokyo Inside Fujikura (72) Inventor Shigeo 42-1 Shintomi, Futtsu City, Chiba Prefecture Fujiku Co., Ltd. La Futtsu Office (72) Inventor Takayuki Hirasawa 1-5-1 Kiba Stock Market, Koto-ku, Tokyo Inside Fujikura (72) Inventor Katsumi Uchida 20 Kitakanzan, Otakamachi, Midori-ku, Nagoya-shi, Aichi No. 1 Chubu Electric Power Co., Inc. (72) Inventor Shinichi Kobayashi Chubuden, 1 Higashishinmachi, Higashi-ku, Nagoya-shi, Aichi Power Co., Ltd. F-term (reference) 5G313 FA01 FB06 FC03 FD01 FD02 FD05 FD09 FD10 FD13 FD14
Claims (8)
ム層、補強層及び接着層を順次積層一体化してなる遮水
テープを、その半導電層がケーブルコア側になるように
縦添え、包被し、この上にシースを設け、このシースが
遮水テープの接着層と溶着していることを特徴とする電
力ケーブル。1. A water-impervious tape comprising a cable core, a semi-conductive layer, an aluminum layer, a reinforcing layer, and an adhesive layer, which are sequentially laminated and integrated so that the semi-conductive layer is on the cable core side. An electric power cable, which is covered with a sheath, and the sheath is welded to the adhesive layer of the water blocking tape.
とを特徴とする請求項１記載の電力ケーブル。2. The power cable according to claim 1, wherein the cable core has no metal shielding layer.
５〜２００μｍであることを特徴とする請求項１または
２記載の電力ケーブル。3. The thickness of the aluminum layer of the waterproof tape is 1
The power cable according to claim 1 or 2, wherein the power cable has a thickness of 5 to 200 µm.
０6Ω−ｃｍ以下であることを特徴とする請求項１、２
または３記載の電力ケーブル4. The semiconductive layer of the water-blocking tape has a volume resistivity 1
It is less than or equal to 0 6 Ω-cm.
Or the power cable described in 3.
が、体積固有抵抗１０6Ω−ｃｍ以下の半導電性クッシ
ョン層であることを特徴とする請求項１、２、３または
４記載の電力ケーブル。5. The outermost layer of the cable core, which is in contact with the water blocking tape, is a semi-conductive cushion layer having a volume resistivity of 10 6 Ω-cm or less, and the outermost layer is a semi-conductive cushion layer. Power cable.
着層を順次積層一体化したことを特徴とする遮水テー
プ。6. A water-impervious tape comprising a semiconductive layer, an aluminum layer, a reinforcing layer and an adhesive layer which are successively laminated and integrated.
ｍであることを特徴とする請求項６記載の遮水テープ。7. The aluminum layer has a thickness of 15 to 200 μm.
The water impervious tape according to claim 6, which is m.
以下であることを特徴とする請求項６または７記載の遮
水テープ。8. The semiconductive layer has a volume resistivity of 10 6 Ω-cm.
The water-shielding tape according to claim 6 or 7, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002143346A JP3761837B2 (en) | 2001-08-24 | 2002-05-17 | Power cable |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254761 | 2001-08-24 | ||
| JP2001-254761 | 2001-08-24 | ||
| JP2002143346A JP3761837B2 (en) | 2001-08-24 | 2002-05-17 | Power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003141943A true JP2003141943A (en) | 2003-05-16 |
| JP3761837B2 JP3761837B2 (en) | 2006-03-29 |
Family
ID=26620949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002143346A Expired - Fee Related JP3761837B2 (en) | 2001-08-24 | 2002-05-17 | Power cable |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280174A (en) * | 2011-08-09 | 2011-12-14 | 兴乐电缆有限公司 | Longitudinal water-resisting cable for shield machine |
| CN103268786A (en) * | 2013-06-17 | 2013-08-28 | 沈阳天荣电缆材料有限公司 | Longitudinal-water-blocking aluminum sheath crosslinked polyethylene cable |
| CN107507672A (en) * | 2016-06-14 | 2017-12-22 | 江苏宝安电缆有限公司 | A kind of high waterproof high-pressure cable |
| CN107749325A (en) * | 2017-11-24 | 2018-03-02 | 烟台万泰通信科技有限公司 | A kind of power cable aluminium foil adhesive waterproof tape |
-
2002
- 2002-05-17 JP JP2002143346A patent/JP3761837B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280174A (en) * | 2011-08-09 | 2011-12-14 | 兴乐电缆有限公司 | Longitudinal water-resisting cable for shield machine |
| CN103268786A (en) * | 2013-06-17 | 2013-08-28 | 沈阳天荣电缆材料有限公司 | Longitudinal-water-blocking aluminum sheath crosslinked polyethylene cable |
| CN107507672A (en) * | 2016-06-14 | 2017-12-22 | 江苏宝安电缆有限公司 | A kind of high waterproof high-pressure cable |
| CN107749325A (en) * | 2017-11-24 | 2018-03-02 | 烟台万泰通信科技有限公司 | A kind of power cable aluminium foil adhesive waterproof tape |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3761837B2 (en) | 2006-03-29 |
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