JP2829528B2 - Water resistant cable - Google Patents
Water resistant cableInfo
- Publication number
- JP2829528B2 JP2829528B2 JP1219148A JP21914889A JP2829528B2 JP 2829528 B2 JP2829528 B2 JP 2829528B2 JP 1219148 A JP1219148 A JP 1219148A JP 21914889 A JP21914889 A JP 21914889A JP 2829528 B2 JP2829528 B2 JP 2829528B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- pvc
- jacket
- eva
- 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.)
- Expired - Fee Related
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
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、水中で使用される耐水性ケーブル、特に絶
縁心線と異種材料からなる外被とを密着又は接着（融
着）させてケーブル内への水の侵入を阻止し、且つ、絶
縁材料及び外被材料中に添加された加工助剤等の移行な
どのない化学的安定な状態の耐水性ケーブルに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a water-resistant cable used in water, in particular, a cable in which an insulated core wire and a jacket made of a different material are adhered or adhered (fused). The present invention relates to a water resistant cable in a chemically stable state that prevents water from entering the inside and does not transfer processing aids and the like added to an insulating material and a jacket material.
電線、ケーブルのうち、常に水中に没した状態で使用
されるものがある。それは例えば水中モーターへの給電
用あるいはこの水中モーターをコントロールするための
信号又はコントロールケーブルが挙げられる。また、他
には、河川などの改修工事においても同じような状態で
使用される。Some electric wires and cables are always used while immersed in water. It includes, for example, a signal or control cable for powering or controlling the underwater motor. In addition, it is used in a similar condition in renovation works for rivers and the like.
このような状態で使用される電線・ケーブルにあっ
て、該電線に要求される特性は、外被からケーブル内へ
の水の侵入を阻止することであり、万一外被にピンホー
ル、クラック等ができて、そのピンホール等から水が侵
入しても、その水の侵入はその極部で阻止されてケーブ
ル内に拡がることのないようにして実用上支障のないも
のとすることである。In an electric wire / cable used in such a state, the characteristic required for the electric wire is to prevent water from entering the inside of the cable from the jacket. Even if water enters through the pinholes and the like, the intrusion of the water is prevented at the poles so that the water does not spread into the cable so that there is no practical problem. .
このようにするために、従来では、絶縁心線を撚合わ
せたケーブルコアーと外被との隙間に、ゼリー状組成物
や水に遭遇すると膨潤するポバール、カーボポール等を
充てん又は塗布したものがある。しかしながら、これ等
は何れも充てんや塗布といった余分の作業や工程を必要
とし生産性やコスト面で十分満足できるものではなく、
又接続端末処理に際しこれ等充てん物を拭き取らねばな
らず、作業性が悪かった。In order to do so, conventionally, a gap between a cable core and an outer sheath, in which an insulated core wire is twisted, is filled or coated with poval, carbopol, or the like that swells when it encounters a jelly-like composition or water. is there. However, all of these require extra work and steps such as filling and coating, and are not sufficiently satisfactory in productivity and cost.
In addition, these fillers had to be wiped off at the time of connection terminal processing, and workability was poor.
また、この他の例で云えば、PE（ポリエチレン）絶縁
心線の撚合わせた芯上に、PVC（ポリ塩化ビニル）を充
実押出成形して外被とするものが考えられる。この場
合、外被のPVC中の可塑剤等がPEに喰われ（移行し）、
急速に劣化して外被にクラックが入る恐れがあり、且
つ、絶縁心線と充実外被との接着ができず、前記クラッ
クから侵入した水がケーブル内に拡がり電気特性が低下
し使用に耐えないものとなる。In another example, it is conceivable that PVC (polyvinyl chloride) is solidly extruded on a twisted core of a PE (polyethylene) insulated core wire to form a jacket. In this case, the plasticizer etc. in the PVC of the jacket is eaten (migrated) by PE,
There is a risk of cracking in the jacket due to rapid deterioration, and the insulated core wire and the solid jacket cannot be adhered to each other. Will not be.
本発明は、以上に鑑み、水中で使用されるケーブルで
あって、PEを絶縁体とする絶縁心線と外被とが強固な接
着状態となり、且つ、外被を構成する組成物中の可塑剤
が絶縁体のPEに喰われることがなく、化学的に安定な耐
水性ケーブルを提供することを課題とする。In view of the above, the present invention is directed to a cable used in water, in which an insulated core wire using PE as an insulator and a jacket are in a firmly bonded state, and plastic in a composition constituting the jacket. It is an object of the present invention to provide a chemically stable water-resistant cable in which an agent is not eaten by the insulator PE.
上記課題を解決するために、本発明にあっては、PE絶
縁心線を撚合わせたコアー上に、EVA（エチレン酢酸ビ
ニール）−PVC共重合体を主体とし、これに、EVAまたは
EEA（エチレンアクリル酸エステル）をベースとするホ
ットメルト樹脂をブレンドした組成物を各絶縁心線間に
押出充てんして被覆し、その上に、PVC外被を施してな
る構成としたのである。In order to solve the above problems, in the present invention, an EVA (ethylene vinyl acetate) -PVC copolymer is mainly provided on a core obtained by twisting PE insulated core wires, and EVA or
A composition in which a hot melt resin based on EEA (ethylene acrylate) is blended is extrusion-filled between each of the insulated core wires, covered, and a PVC jacket is provided thereon.
上記PVCとEVAの比は、60:40〜30:70重量％の範囲と
し、EVA−PVC共重合体とホットメルト樹脂との重量比
は、10:1〜10:10の範囲とすることが好ましい。The ratio between the PVC and EVA is in the range of 60:40 to 30: 70% by weight, and the weight ratio of the EVA-PVC copolymer to the hot melt resin is in the range of 10: 1 to 10:10. preferable.
上記の如く構成する本発明に係る耐水性ケーブルは、
PE絶縁と上記組成物及び組成物とPVCの親和性により、
組成物を介して外被と絶縁心線が完全な接着状態となっ
ており、且つ、上記共重合体は無可塑PVC（可塑剤を全
く含まないPVC）であるため、可塑剤等がPE絶縁に喰わ
れる危惧もなく、化学的に安定で、良好な機械的・物理
的特性を有する。The water-resistant cable according to the present invention configured as described above,
By the affinity of PE insulation and the above composition and composition and PVC,
Since the jacket and the insulated core are in a completely bonded state via the composition, and the copolymer is non-plasticized PVC (PVC containing no plasticizer), the plasticizer etc. is PE-insulated It is chemically stable and has good mechanical and physical properties without fear of being eaten.
したがって、万一、外被にピンホール、クラック等が
生じて水が侵入しても、外被とPE絶縁の密着性により水
が拡がらない。すなわち、水の侵入はその極部で阻止さ
れる。また、外被とPE絶縁の密着性により、端末接続部
での心線の突出がなく、その端末部からの浸水・走水も
ない。Therefore, even if pinholes, cracks, etc. occur in the jacket and water enters, water does not spread due to the adhesion between the jacket and the PE insulation. That is, water intrusion is prevented at its extremes. In addition, due to the adhesion between the jacket and the PE insulation, there is no protrusion of the core wire at the terminal connection portion, and there is no water or water running from the terminal portion.
次に、本発明の実施例を説明する。 Next, examples of the present invention will be described.
図に示すように、0.5mm2（20本/0.18mmφ）の電気銅
撚導体１上にPE絶縁２を施して絶縁心線（外径2.0mm
φ）３とし、これを７本同心撚りしてケーブルの芯（外
径4.7mm）とする。このケーブルの芯上に、第１表に示
す組成物を各絶縁心線３間に押出充てんして充てん層５
とし、その充てん層５上に、PVCで外被４を施して本発
明に係る耐水性ケーブル（外径8.1mmφ）Ｐを得た。As shown in the figure, a PE insulation 2 is applied on a 0.5 mm 2 (20 conductors / 0.18 mmφ) copper electro-twisted conductor 1 to form an insulated core wire (outer diameter 2.0 mm).
φ) 3 and seven of them are concentrically twisted to make a cable core (outer diameter 4.7 mm). The composition shown in Table 1 was extrusion-filled between the insulated core wires 3 on the core of this cable to form a packing layer 5.
Then, a jacket 4 was made of PVC on the packed layer 5 to obtain a waterproof cable (outer diameter 8.1 mmφ) P according to the present invention.
つぎに、本発明の効果を確認するために、上記組成物
による充てん層５を施こさずに、外被４にPVCを用いた
従来例と、上記PVC−EVA共重合体のPVC:EVAの重量比を
種々の範囲と したもの、および上記共重合体と上記ホットメルト樹脂
（HMR）との重量比を種々の範囲とした実施例及び比較
例を第１表に併せて示す。Next, in order to confirm the effect of the present invention, without applying the filling layer 5 of the above composition, a conventional example using PVC for the jacket 4 and the PVC: EVA of the PVC-EVA copolymer Various weight ratios Examples and comparative examples in which the weight ratio of the copolymer and the hot melt resin (HMR) to various ranges are shown in Table 1.
その下欄には、移行性試験、浸水試験、外被と絶縁心
線との接着状況、外観等の試験結果を示す。The lower column shows the results of the migration test, the immersion test, the adhesion between the jacket and the insulated core wire, the appearance, and the like.
この試験結果から、本発明に係るケーブルが従来例に
比べ優れていることが理解できる。From this test result, it can be understood that the cable according to the present invention is superior to the conventional example.
本発明は、以上のように構成したので、端末からの浸
水もなく、万一、その端末又はピンポール等から浸水し
てもその浸水が極部的なもので抑えられ、電気特性の低
下を招くことがない。また、ゼリー状組成物の充てん作
業、ポバール等の塗布作業といった工程もなく、生産性
と接続端末処理における作業性もよい。Since the present invention is configured as described above, there is no inundation from the terminal, and even if the terminal or the pin pole or the like is flooded, the inundation is suppressed by the extreme part, and the electric characteristics are deteriorated. Nothing. In addition, there is no step of filling the jelly-like composition or applying povar or the like, so that productivity and workability in connection terminal processing are good.
したがって、本発明によれば、耐用年数が長く、か
つ、長期に亘って安定した耐水性ケーブルを安価にして
得ることができる効果がある。Therefore, according to the present invention, there is an effect that a water-resistant cable having a long service life and stable over a long period can be obtained at low cost.
図面は、本発明に係る耐水性ケーブルの一実施例の部分
斜視図である。 １……電気銅撚導体、２……PE絶縁、 ３……絶縁心線、４……外被、 ５……組成物充てん層、Ｐ……ケーブル。The drawing is a partial perspective view of one embodiment of the waterproof cable according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Copper twisted conductor, 2 ... PE insulation, 3 ... Insulated core wire, 4 ... Jacket, 5 ... Composition filling layer, P ... Cable.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大西 喜八 大阪府東大阪市岩田町２丁目３番１号 タツタ電線株式会社内 (56)参考文献 特開 昭59−44711（ＪＰ，Ａ) 特開 昭63−297451（ＪＰ，Ａ) 特開 昭63−297445（ＪＰ，Ａ) 実開 平１−160619（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kihachi Onishi 2-3-1 Iwatacho, Higashiosaka-shi, Osaka Tatsuta Electric Wire Co., Ltd. (56) References JP-A-59-44711 (JP, A) JP-A-63-297451 (JP, A) JP-A-63-297445 (JP, A)
Claims (2)
−PVC共重合体を主体とし、これに、EVAまたはEEAをベ
ースとするホットメルト樹脂をブレンドした組成物を各
絶縁心線間に押出充てんして被覆し、その上にPVC外被
を施してなることを特徴とする耐水性ケーブル。An EVA is provided on a core obtained by twisting PE insulated core wires.
-A composition comprising a PVC copolymer as a main component and a hot melt resin blended based on EVA or EEA, which is extruded and filled between each of the insulated core wires, and a PVC jacket is applied thereon. Water-resistant cable characterized by becoming.
て、上記組成物が下記の構成（ａ）、（ｂ）であること
を特徴とする耐水性ケーブル。 （ａ） PVCとEVAの比が60:40〜30:70重量％の範囲であ
ること、 （ｂ） EVA−PVC共重合体とホットメルト樹脂との重量
比が10:1〜10:10の範囲であること、2. The water-resistant cable according to claim 1, wherein said composition has the following constitutions (a) and (b). (A) the ratio of PVC to EVA is in the range of 60:40 to 30: 70% by weight; and (b) the weight ratio of EVA-PVC copolymer to hot melt resin is 10: 1 to 10:10. Range,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1219148A JP2829528B2 (en) | 1989-08-25 | 1989-08-25 | Water resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1219148A JP2829528B2 (en) | 1989-08-25 | 1989-08-25 | Water resistant cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0381911A JPH0381911A (en) | 1991-04-08 |
| JP2829528B2 true JP2829528B2 (en) | 1998-11-25 |
Family
ID=16730966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1219148A Expired - Fee Related JP2829528B2 (en) | 1989-08-25 | 1989-08-25 | Water resistant cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2829528B2 (en) |
-
1989
- 1989-08-25 JP JP1219148A patent/JP2829528B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0381911A (en) | 1991-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |