JP2004064826A - Dismantling method for water shielded cable - Google Patents

Dismantling method for water shielded cable Download PDF

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Publication number
JP2004064826A
JP2004064826A JP2002216711A JP2002216711A JP2004064826A JP 2004064826 A JP2004064826 A JP 2004064826A JP 2002216711 A JP2002216711 A JP 2002216711A JP 2002216711 A JP2002216711 A JP 2002216711A JP 2004064826 A JP2004064826 A JP 2004064826A
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Japan
Prior art keywords
cable
water
layer
protective sheath
impervious
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JP2002216711A
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Japanese (ja)
Inventor
Tadayuki Uematsu
植松 忠之
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Furukawa Electric Co Ltd
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Furukawa Electric Co Ltd
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Priority to JP2002216711A priority Critical patent/JP2004064826A/en
Publication of JP2004064826A publication Critical patent/JP2004064826A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/62Plastics recycling; Rubber recycling
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/82Recycling of waste of electrical or electronic equipment [WEEE]

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  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Electric Cable Installation (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dismantling method for a water shielded cable, capable of effectively reusing resources by easily and efficiently peeling and sorting a water shielded layer and a protective sheath layer, at the time of recycling the waterproof cable which is formed by integrally stacking the water shielded layer which is formed out of laminated tape formed by appropriately layering metal and rubber plastic material, and the protective sheath layer. <P>SOLUTION: In the water shielded cable, the water shielded layer formed out of the laminated tape by appropriately layering the metal and the rubber plastic material, and the protective sheath layer, are sequentially provided at an outer periphery of a cable core. The shielded layer and the sheath layer are separated and sorted into the protective sheath, the laminated tape, and the cable core. The temperature of the protective sheath layer of the water shielded cable is increased at and more than 80 °C, then ironing is applied to the water shielded cable from the outer periphery, and vertical splitting from the protective sheath layer to the water shielded layer is provided, thus attaining separation and sorting into the protective sheath, the laminated tape, and the cable core. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、金属とゴムプラスチック材料を適宜積層してなるラミネートテープからなる遮水層と保護シース層が接着一体化してなる遮水ケーブルのリサイクルに際して、遮水層と保護シース層とを容易に効率よく剥離し、分別することができる資源の再利用に有効な遮水ケーブルの解体方法に関するものである。
【0002】
【従来の技術】
図1に示すように一般の遮水ケーブル1は、導体層2とケーブル絶縁層3からなるケーブルコア4の外周にラミネートテープからなる遮水層5を設けてケーブルコア4を遮水保護し、遮水層5の外側に保護層6を設けた構造である。遮水層5を形成するラミネートテープとしては、ポリエチレン樹脂等のプラスチックフィルムや合成ゴム、特にラミネートテープに強度が要求される場合にはポリエステルフィルムを採用し、該プラスチックフィルムに銅、アルミニウム、鉛等の薄い金属箔を貼り合わせたものが使用され、保護シース層6と接着一体化するためにラミネートテープの最外層に保護シース接着用接着剤(図示せず)が設けられている。
【0003】
かかる遮水ケーブル1は、ケーブルコア4の外周にラミネートテープの接着剤塗布面を外側に向けて縦添え包皮して遮水層5を設け、該遮水層5に設けた接着剤の上にプラスチックシース材からなる保護シース層6を押出成形する。遮水層5に設けた接着剤は保護シース層6を押出成形する際の熱で溶融し、ラミネートテープからなる遮水層5と保護シース層6とを強固に接着一体化している。このような遮水ケーブルは外部環境からのケーブル内への水の浸入を完全にシャットアウトすることができ、水の浸入が危惧される環境で多く使用される。
【0004】
ところで、遮水ケーブルは電力会社のみでなく、使用環境の厳しい石油化学工場、薬品工場等の民需産業向けにも広く採用されてきており、使用量の増加に伴い、使用済みの遮水ケーブルを産業廃棄物として処分する必要性が出始めている。
近年、環境問題が強く意識され、遮水ケーブルを産業廃棄物として処理する際、単なる廃棄物処理でなく、リサイクルすることにより資源の有効活用を図る対象となっており、使用済み遮水ケーブルを解体し、ケーブルコア、ラミネートテープ、保護シースとに分離し、それぞれを有効に再利用する方策がとられつつある。
【0005】
遮水ケーブルの解体方法としては、ケーブルを長手方向に2分割して半円形とし、ケーブルコア4と、接着している遮水層5と保護シース層6とのラップシース(以下この複合体を単にラップシースと言う)との2つの部分に先ず分解する。次いで、ラップシースから、ラミネートテープからなる遮水層と保護シース層とを分離するが、両者は接着剤で強固に接着しているため、始めにラップシースを加熱して接着剤の接着強度を低下させ、接着強度が低下したところで、人力により両者を剥離していた。
【0006】
しかし、近年、接着剤の進歩によって接着剤の耐熱性が向上し、単にラップシースを加熱しただけでは両者の接着力を充分に弱めることができず、人力で剥離すると途中で千切れてしまう等して分離作業が困難になってきている。
かかる状況のもとに、ラップシースから遮水層(ラミネートテープ)と保護シース層を剥離する方法として、ラミネートシースと保護シース層との剥離を、従来の人力による強制剥離ではなく、ラミネートテープと保護シースとの間の物性の相違、すなわち復元力や収縮力等の差異を利用して、ラミネートテープと保護シース層との自然剥離を誘発するようにしたラミネートテープと保護シース層との剥離方法が提案されている(特開2001−16736号公報)。
【0007】
この方法は、遮水ケーブルを長手方向に沿って先ず2分割カット処理し、ラップシースをケーブルコアから分離する工程、分離された断面半円形状のラップシースを一対のギヤ形状ロール間でロール加工処理し、ラップシースを平らでかつ波形状に塑性変形させるロール加工工程、ロール加工後、ラミネートテープと保護シースとの間の接着剤を溶融させる加熱工程、ラミネートテープと保護シース層を自然冷却し、両者間の復元力、収縮力の差異により、両者を自然剥離させる剥離工程とからなっている。
【0008】
即ち、この方法によれば、断面半円形状のラップシースを平らでかつ波形状に塑性変形させると、プラスチック材には、半円形に戻ろうとする復元力が幅方向に作用するとともに収縮力が長手方向に作用するものの、アルミ箔等の金属箔には、復元力も収縮力も作用しない。
【0009】
従って、ラミネートテープと保護シース層との間を接合している接着剤が溶融して両者の拘束が弱くなれば、上述したラミネートテープと保護シース層との間の復元力と収縮力の差異により、ラミネートテープが保護シース層を押し出す形で両者は自然に剥離する。
【0010】
よって、この提案は引張り力により強制的に剥離を行なうのではなく、物性の差を利用して自然に剥離を行なうものであるため、途中で保護シースが千切れたりすることがなく、精度良く両者の剥離が進行することができ、また、引張り力の負荷も極めて少なくて済む方法である。
【0011】
【発明が解決しようとする課題】
しかしながら、このような方法では、先ず遮水ケーブル全体を長手方向に沿って2分割カット、即ち、撚り線導体をもカットしてしまう。ケーブル導体は撚り線からなるため、ケーブル導体を長手方向にカットすると、導体が細かく裁断されて飛び散る危険性がある。また、2分割した後で、密着しているケーブルコアとラップシースとを剥離するのに導体切断の際に、導体の切子が絶縁体に付着或いは食い込んでいるため作業に危険が伴い、手間を要し、ケーブル絶縁層に導体が食い込んでいるためにその再処理が改めて必要になる等の欠点がある。
【0012】
本発明は、かかる従来の欠点を解消し、使用済み遮水ケーブルのリサイクルによる資源の有効利用を図ったもので、遮水層と保護シース層とを容易に効率よく剥離・分別することができる遮水ケーブルの解体方法に関するものである。
【0013】
【課題を解決するための手段】
本発明は、ケーブルコアの外周に、ラミネートテープからなる遮水層、保護シース層を順次設けてなる遮水ケーブルを解体して保護シース、ラミネートテープ、ケーブルコアに分離・分別する遮水ケーブルの解体方法において、該遮水ケーブルの保護シース層の温度を80°C以上に昇温して後、該遮水ケーブルにその外周からしごきを加え、保護シース層から遮水層に至る縦割りを入れて、保護シース、ラミネートテープ、ケーブルコアに分離・分別することを特徴とする遮水ケーブルの解体方法である。
【0014】
本発明の方法において、保護シース層の温度を80℃以上に昇温させるのは、ラミネートテープと保護シース層とを接着している接着剤の接着強度を熱劣化させて弱めるためで、保護シース層を暖める温度は接着剤を劣化させるには高いほど有効であるが、温度を高くするには熱エネルギーを必要とし、また、再利用する保護シース層の材料を熱劣化させる危険性もあるため、昇温温度は80℃〜110℃の範囲が適切である。
【0015】
次に遮水ケーブルにその外周からしごきを加えるが、しごきに必要な剪断応力は保護シース層と遮水層(ラミネートテープ)との間に0.5kg/cm以上の剪断応力を与えることが好ましい。
【0016】
【発明の実施の形態】
以下、本発明の一実施形態を示す図面により詳細に説明する。
図2は本発明方法に使用する遮水ケーブル1の分解・解体工程を示す工程説明図で、遮水ケーブル1は加熱炉11に通され加熱される。加熱炉としては遠赤外線加熱炉、赤外線加熱炉、電気加熱炉、蒸気加熱炉等、遮水ケーブルが80℃以上に加熱できるものであればその種類は問われない。
【0017】
遮水ケーブル1は加熱されることにより保護シース層6とラミネートテープからなる遮水層5(以下単にラミネートテープ5と言う)とを接着している接着剤が熱劣化し、両者間の接着強度が弱められる。
加熱された遮水ケーブルは剪断応力付与機12によりしごき(剪断応力)を付与される。剪断応力付与機12としては、例えば図3に示すように4本のロール22からなる井桁式ロール21を例えば3基、ロールの方向を変えてタンデムに配列し、遮水ケーブル1を3基の井桁式ロール21のロール22間に通すことによりケーブル1に0.5kg/cm以上の剪断応力、即ちしごきを付与する。なお、しごきを付与する方法としては、2乃至3本のロールからなるもの、キャタピラ式のもの等遮水ケーブル1にしごき(剪断応力)を付与できるものであれば任意に選択することができる。ケーブル1にしごきを与えることで、接着力の弱められた保護シース層6とラミネートテープ5との接着部分の剥離が進み、同時に、ラミネートテープの金属箔とゴムプラスチックフィルムとの剥離も促進される。
【0018】
しごきを付与されたケーブル1は次に切り込みを入れられる。遮水ケーブル1への切り込みは、例えばケーブル1が通過する複数の井桁式ロール21の最後のロールに切り込み用の刃を設置すればよい。なお、遮水ケーブルへの切り込みは1個所でもよく、対角線に2箇所、或いは等間隔に複数箇所入れても良い。また、切り込む深さは、ケーブルコアに至るかその寸前までである。
切り込みを入れられたケーブル1は次に剥線機13により保護シース層6、ラミネートテープ5、ケーブルコア4に簡単に分離される。
【0019】
本発明は上述したように、先ず遮水ケーブル1の保護シース層6の温度を80°C以上に昇温し、保護シース層6とラミネートテープ5とを接着している接着剤の接着強度を弱め、次いで、該遮水ケーブル1にその外周からしごきを加えて保護シース層6とラミネートテープ5との接着部分に剥離力を作用させ、最後に、保護シース層6からケーブルコア4に至る縦割りを入れて、保護シース6、ラミネートテープ5、ケーブルコア4に分離・分別する遮水ケーブルの解体方法である
【0020】
以下本発明を実施例により説明する。
50μm厚さのアルミニウム箔の片面に100μm厚さの導電性・熱可塑性プラスチックフィルムを、他方の面に熱硬化型接着剤を介して50μm厚さのPETフィルムを貼着し、PETフィルムの外側に100μm厚さのポリ塩化ビニールシース接着用接着剤を塗布したラミネートテープを用意した。
このラミネートテープの接着剤塗布面を外側にして、図1に示すように、ケーブルコア4に縦添えして遮水層5を、その上にポリ塩化ビニールを押出成形して保護シース層6を設け、試験用の6kV遮水ケーブル1を試作した。
【0021】
このようにして試作した遮水ケーブル1の一部を切り取り、切り取ったケーブルからラップシースを分離し、ラミネートテープと保護シース層との剥離試験として、円周方向にわたって180度剥離試験を行ったところ、剥離力は2〜3kg/cm幅で安定していた。
この試作遮水ケーブルを5m/分の速度で遠赤外線ヒータ炉を通過させ、保護シース層の温度を100°Cに加熱し、次いで角度を変えた3組の井桁ロールを通してシース層にしごき(圧縮力)(剪断応力)を加え、最後の井桁ロールに設けた切り込み用回転刃によりラップシースを対角線に2ヶ所切り、剥線機で保護シース層6、ラミネートテープ5、ケーブルコア4に分離・分別した。井桁ロールによるケーブルへの剪断応力は、剥線機での保護シース層6とラミネートテープ5との分離の状況をみながらロール間の幅を調整して行った。その結果、100mの遮水ケーブルの分解を何等の支障もなく行うことができた。
【0022】
比較例
実施例で試作したのと同じ試験用遮水ケーブルを作製し、該遮水ケーブルを長手方向に先ず2分割した。この時、ケーブルコアをも同時に切断するため、導体の切子が飛び散るのを防止するため周囲を囲って切断作業を行った。従って切子が飛び散るのは防止できたが、導体の切子は絶縁層にかなり食い込んでいた。次にラップシースとケーブルコアとを分離したが、導体が付着している絶縁層とラップシースとの分離は容易でなかった。次いでケーブルコアから分離したラップシースを遠赤外線ヒータで100°Cに加熱した後、ラミネートテープと保護シース層との剥離・分別を人力で強制的に試みた。その結果、剥離の途中でラミネートテープが切断するトラブルが発生し、その都度再度加熱し直す作業の繰り返しが必要になり、作業には多くの困難が要求された。
【0023】
上述したように、本発明の実施例では、何等のトラブルもなく試験ケーブルをケーブルコア、ラミネートテープ、保護シース層に分離・分別することができたが、比較例では、切断した導体によるトラブル、ラミネートテープと保護シース層との分離作業に困難をきたし、作業時間が長く取られる等の問題が生じた。
【0024】
【発明の効果】
本発明は上述したように、先ず遮水ケーブルの保護シース層の温度を80°C以上に昇温し、保護シースとラミネートテープとを接着している接着剤の接着強度を弱め、次いで、該遮水ケーブルにその外周からしごきを加えて保護シース層とラミネートテープとの接着部分に剥離力を作用させ、最後に、保護シース層から遮水層に至る縦割りを入れて、保護シース、ラミネートテープ、ケーブルコアに分離・分別する遮水ケーブルの解体方法である。従って、解体に当たりケーブルコアを切断しない、即ちケーブル導体を切断しないので導体の切子が発生せず、ケーブル全体に加熱、しごきを加えるのでケーブルコアと遮水層、遮水層と保護シース層とのそれぞれの界面の接着力が弱められ、剥離され、従って、これら3者に分離・分別することが極めて容易になり、遮水ケーブルのリサイクルを簡便にすることができる優れた効果を有するものである。
【図面の簡単な説明】
【図1】遮水ケーブルの一例を示す断面図である。
【図2】本発明に係る遮水ケーブルの分離・分別工程の概要を示す説明図である。
【図3】本発明で使用する井桁ロールの一例を示す正面図である。
【符号の説明】
1 遮水ケーブル
2 ケーブル導体
3 絶縁層
4 ケーブルコア
5 遮水層
5 保護シース層
11 加熱炉
12 しごき機(応力付与機)
13 剥線機
21 ロール
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention facilitates the formation of a water-impervious layer and a protective sheath layer when recycling a water-impervious cable formed by bonding and integrating a water-impervious layer composed of a laminated tape obtained by appropriately laminating a metal and a rubber plastic material. The present invention relates to a method for disassembling a water-impervious cable, which is effective for reusing resources that can be efficiently separated and separated.
[0002]
[Prior art]
As shown in FIG. 1, a general water-impervious cable 1 is provided with a water-impervious layer 5 made of a laminate tape on the outer periphery of a cable core 4 including a conductor layer 2 and a cable insulating layer 3 to protect the cable core 4 from water-imperviousness. This is a structure in which a protective layer 6 is provided outside the water blocking layer 5. As a laminate tape for forming the water-blocking layer 5, a plastic film such as a polyethylene resin or a synthetic rubber, particularly a polyester film is used when the laminate tape requires strength, and the plastic film is made of copper, aluminum, lead, or the like. A thin metal foil is adhered to the protective sheath layer 6, and an adhesive (not shown) for bonding the protective sheath is provided on the outermost layer of the laminate tape so as to be integrated with the protective sheath layer 6.
[0003]
Such a water-impervious cable 1 is provided with a water-impervious layer 5 on the outer periphery of the cable core 4 with the adhesive-coated surface of the laminate tape facing outward, and is provided with a water-impervious layer 5 on the adhesive provided on the water-impervious layer 5. The protective sheath layer 6 made of a plastic sheath material is extruded. The adhesive provided on the water-blocking layer 5 is melted by the heat when the protective sheath layer 6 is extruded, and the water-blocking layer 5 made of a laminate tape and the protective sheath layer 6 are firmly bonded and integrated. Such a water impermeable cable can completely shut out water intrusion into the cable from the external environment, and is often used in an environment where water intrusion is feared.
[0004]
By the way, water-impervious cables are widely used not only by electric power companies but also by private-sector industries such as petrochemical plants and chemical plants, which have severe usage environments. The need to dispose as industrial waste is beginning to emerge.
In recent years, environmental issues have been strongly conscious, and when treating impermeable cables as industrial waste, it has become a target for effective use of resources by recycling, not just waste disposal. Measures are being taken to disassemble, separate into a cable core, a laminate tape, and a protective sheath, and reuse each of them effectively.
[0005]
As a method of disassembling the water-impervious cable, the cable is divided into two in the longitudinal direction to have a semicircular shape, and a wrap sheath of the cable core 4 and the bonded water-impervious layer 5 and protective sheath layer 6 (hereinafter, this composite is referred to as (Referred to simply as a wrap sheath). Next, a water-impervious layer made of a laminate tape and a protective sheath layer are separated from the wrap sheath, but since both are firmly bonded with an adhesive, the wrap sheath is first heated to reduce the adhesive strength of the adhesive. When the adhesive strength was reduced, the two were peeled off by human power.
[0006]
However, in recent years, the heat resistance of the adhesive has been improved due to the progress of the adhesive, and the adhesive force between the two cannot be sufficiently weakened by simply heating the wrap sheath. As a result, separation work has become difficult.
Under such circumstances, as a method of peeling the water-impervious layer (laminate tape) and the protective sheath layer from the wrap sheath, the peeling of the laminate sheath and the protective sheath layer is performed by using a laminate tape instead of the conventional manual peeling. A method of peeling a laminate tape and a protective sheath layer so as to induce a natural peeling between the laminate tape and the protective sheath layer by utilizing a difference in physical properties between the protective sheath and the protective sheath, that is, a difference in restoring force and contraction force. Has been proposed (Japanese Patent Laid-Open No. 2001-16736).
[0007]
In this method, the water-impervious cable is first cut in two in the longitudinal direction, and the wrap sheath is separated from the cable core. The separated wrap sheath having a semicircular cross section is rolled between a pair of gear-shaped rolls. Rolling process to plastically deform the wrap sheath into a flat and corrugated shape, heating process to melt the adhesive between the laminate tape and the protective sheath after the roll process, natural cooling of the laminate tape and the protective sheath layer And a peeling step of spontaneously peeling off the two due to the difference between the restoring force and the contracting force between the two.
[0008]
That is, according to this method, when the wrap sheath having a semicircular cross-section is plastically deformed into a flat and corrugated shape, a restoring force for returning to a semicircular shape acts on the plastic material in the width direction, and a contraction force is applied. Although acting in the longitudinal direction, neither a restoring force nor a contracting force acts on a metal foil such as an aluminum foil.
[0009]
Therefore, if the adhesive bonding between the laminate tape and the protective sheath layer is melted and the restraint between them is weakened, the difference between the restoring force and the contraction force between the laminate tape and the protective sheath layer described above causes the difference. Then, the two are spontaneously peeled off in a form in which the laminate tape pushes out the protective sheath layer.
[0010]
Therefore, this proposal does not forcibly peel off by a tensile force, but peels off naturally using the difference in physical properties. This is a method in which the peeling of both can proceed and the load of the tensile force can be extremely small.
[0011]
[Problems to be solved by the invention]
However, in such a method, first, the entire impermeable cable is cut in two along the longitudinal direction, that is, the stranded conductor is also cut. Since the cable conductor is made of a stranded wire, if the cable conductor is cut in the longitudinal direction, there is a risk that the conductor is cut into small pieces and scattered. In addition, when the conductor is cut to separate the cable core and the wrap sheath that are in close contact with each other after dividing into two, the conductor cuts are attached or cut into the insulator, which involves a danger in the work, and is troublesome. In other words, there is a drawback in that the conductor is bitten into the cable insulating layer, so that reprocessing is required again.
[0012]
The present invention solves such a conventional drawback and aims at effective use of resources by recycling used water-impervious cables, and can easily and efficiently separate and separate a water-impervious layer and a protective sheath layer. The present invention relates to a method of disassembling a water impermeable cable.
[0013]
[Means for Solving the Problems]
The present invention provides a water-impervious cable that separates and separates a water-impervious cable formed by sequentially providing a water-impervious layer made of a laminate tape and a protective sheath layer on the outer periphery of a cable core, and separating and separating the protective sheath, the laminate tape, and the cable core. In the disassembly method, after raising the temperature of the protective sheath layer of the water-impervious cable to 80 ° C. or higher, ironing is applied to the water-impervious cable from its outer periphery, and the vertical division from the protective sheath layer to the water-impervious layer is performed. This is a method for disassembling a water-impervious cable, wherein the water-impervious cable is separated and separated into a protective sheath, a laminate tape, and a cable core.
[0014]
In the method of the present invention, the reason why the temperature of the protective sheath layer is raised to 80 ° C. or higher is that the adhesive strength of the adhesive bonding the laminate tape and the protective sheath layer is weakened by thermal deterioration and the protective sheath is weakened. The higher the temperature at which the layer is warmed, the more effective it degrades the adhesive, but the higher the temperature, the more heat energy is required and the risk of thermal degradation of the material of the protective sheath layer to be reused. The heating temperature is suitably in the range of 80C to 110C.
[0015]
Next, ironing is applied to the water-impervious cable from its outer periphery. The shearing stress required for ironing preferably gives a shear stress of 0.5 kg / cm or more between the protective sheath layer and the water-impervious layer (laminate tape). .
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 2 is a process explanatory view showing a step of disassembling and disassembling the water-impervious cable 1 used in the method of the present invention. The water-impervious cable 1 is passed through a heating furnace 11 and heated. The type of the heating furnace is not limited, such as a far-infrared heating furnace, an infrared heating furnace, an electric heating furnace, and a steam heating furnace as long as the water-shielding cable can be heated to 80 ° C. or higher.
[0017]
When the water-impervious cable 1 is heated, the adhesive bonding the protective sheath layer 6 and the water-impervious layer 5 made of a laminate tape (hereinafter simply referred to as the laminate tape 5) is thermally degraded, and the adhesive strength between the two is increased. Is weakened.
The heated impermeable cable is ironed (shear stress) by the shear stress applying machine 12. As the shear stress applying machine 12, for example, as shown in FIG. 3, three well-girder type rolls 21 composed of four rolls 22 are arranged in tandem by changing the direction of the rolls, and three impermeable cables 1 are provided. By passing the cable 1 between the rolls 22 of the girder type roll 21, a shear stress of 0.5 kg / cm or more, that is, ironing is applied to the cable 1. The method of applying ironing can be arbitrarily selected as long as it can apply ironing (shear stress) to the water-impervious cable 1 such as a two-roll or three-roll type or a caterpillar type. By ironing the cable 1, the peeling of the bonding portion between the protective sheath layer 6 and the laminating tape 5, whose bonding strength has been weakened, proceeds, and at the same time, the peeling of the metal foil of the laminating tape from the rubber plastic film is promoted. .
[0018]
The ironed cable 1 is then cut. The cut into the water-impervious cable 1 may be performed, for example, by installing a cut blade on the last roll of a plurality of double-girder rolls 21 through which the cable 1 passes. The cut into the impermeable cable may be made at one location, or may be made at two locations diagonally or at multiple locations at equal intervals. Further, the cutting depth extends to or just before the cable core.
The cut cable 1 is then easily separated by a stripping machine 13 into a protective sheath layer 6, a laminate tape 5, and a cable core 4.
[0019]
As described above, the present invention first raises the temperature of the protective sheath layer 6 of the water-impervious cable 1 to 80 ° C. or higher, and reduces the adhesive strength of the adhesive bonding the protective sheath layer 6 and the laminate tape 5. Then, ironing is applied to the water-impervious cable 1 from the outer periphery thereof to apply a peeling force to an adhesive portion between the protective sheath layer 6 and the laminate tape 5, and finally, the vertical direction from the protective sheath layer 6 to the cable core 4. This is a method of disassembling a water-impervious cable that is divided and separated into a protective sheath 6, a laminate tape 5, and a cable core 4.
Hereinafter, the present invention will be described with reference to examples.
A conductive / thermoplastic film with a thickness of 100 μm is adhered on one side of an aluminum foil with a thickness of 50 μm, and a PET film with a thickness of 50 μm is adhered on the other side via a thermosetting adhesive. A laminate tape having a thickness of 100 μm and coated with a polyvinyl chloride sheath adhesive was prepared.
With the adhesive applied side of this laminated tape facing outward, as shown in FIG. 1, a water impermeable layer 5 is vertically attached to the cable core 4, and a protective sheath layer 6 is formed by extruding polyvinyl chloride thereon. A 6 kV impermeable cable 1 for testing was produced.
[0021]
A part of the water-impervious cable 1 thus produced was cut off, the wrap sheath was separated from the cut-out cable, and a 180 ° peeling test was performed in the circumferential direction as a peeling test between the laminate tape and the protective sheath layer. The peel force was stable at a width of 2 to 3 kg / cm.
The prototype water-impervious cable was passed through a far-infrared heater furnace at a speed of 5 m / min, the temperature of the protective sheath layer was heated to 100 ° C, and then the sheath layer was squeezed (compressed) through three sets of girder rolls at different angles. Force) (shear stress), the lap sheath is cut diagonally at two locations by a rotary cutter for cutting provided on the last girder roll, and separated and separated into a protective sheath layer 6, a laminate tape 5, and a cable core 4 by a stripping machine. did. The shear stress on the cable by the cross-girder roll was adjusted by adjusting the width between the rolls while observing the state of separation of the protective sheath layer 6 and the laminate tape 5 in the stripping machine. As a result, the 100 m waterproof cable could be disassembled without any trouble.
[0022]
COMPARATIVE EXAMPLE The same test impervious cable produced as in the example was produced, and the impervious cable was first divided into two in the longitudinal direction. At this time, in order to cut the cable core at the same time, a cutting operation was performed around the periphery to prevent the conductor facets from scattering. Therefore, although the facets could be prevented from being scattered, the conductor facets considerably penetrated the insulating layer. Next, the lap sheath and the cable core were separated, but it was not easy to separate the wrap sheath from the insulating layer to which the conductor was attached. Next, the wrap sheath separated from the cable core was heated to 100 ° C. by a far-infrared heater, and then the separation and separation of the laminate tape and the protective sheath layer were forcibly attempted by human power. As a result, a problem occurs in which the laminating tape is cut off during the peeling, and it is necessary to repeat the operation of reheating each time, and many difficulties are required for the operation.
[0023]
As described above, in the example of the present invention, the test cable could be separated and separated into the cable core, the laminate tape, and the protective sheath layer without any trouble. The work of separating the laminate tape and the protective sheath layer became difficult, and problems such as a long working time occurred.
[0024]
【The invention's effect】
As described above, the present invention first raises the temperature of the protective sheath layer of the water-impervious cable to 80 ° C. or higher, weakens the adhesive strength of the adhesive bonding the protective sheath and the laminate tape, Ironing is applied to the water-impervious cable from the outer periphery to apply a peeling force to the adhesive portion between the protective sheath layer and the laminating tape. This is a method for dismantling water-impervious cables that are separated and separated into tape and cable cores. Therefore, the cable core is not cut when the cable is dismantled, that is, the cable conductor is not cut, so that there is no cut of the conductor, and heating and ironing are applied to the entire cable. The adhesive strength of each interface is weakened and peeled off, and therefore, it is extremely easy to separate and separate these three members, and it has an excellent effect of simplifying the recycling of the impermeable cable. .
[Brief description of the drawings]
FIG. 1 is a sectional view showing an example of a water impermeable cable.
FIG. 2 is an explanatory view showing an outline of a separation / separation step of the impermeable cable according to the present invention.
FIG. 3 is a front view showing an example of a girder roll used in the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water-proof cable 2 Cable conductor 3 Insulation layer 4 Cable core 5 Water-proof layer 5 Protective sheath layer 11 Heating furnace 12 Ironing machine (stress applying machine)
13 Stripping machine 21 Roll

Claims (1)

ケーブルコアの外周に、ラミネートテープからなる遮水層、保護シース層を順次設けてなる遮水ケーブルを解体して保護シース、ラミネートテープ、ケーブルコアに分離・分別する遮水ケーブルの解体方法において、該遮水ケーブルの保護シース層の温度を80°C以上に昇温して後、該遮水ケーブルにその外周からしごきを加え、保護シース層から遮水層に至る縦割りを入れて、保護シース、ラミネートテープ、ケーブルコアに分離・分別することを特徴とする遮水ケーブルの解体方法。On the outer periphery of the cable core, a water-impervious layer made of a laminated tape, a water-impervious cable disassembled by sequentially disposing a water-impervious cable provided with a protective sheath layer, a protective sheath, a laminate tape, After raising the temperature of the protective sheath layer of the water-impervious cable to 80 ° C. or higher, ironing is applied to the water-impervious cable from its outer periphery, and a vertical split from the protective sheath layer to the water-impervious layer is inserted to protect the cable. A method for disassembling a water-impervious cable, comprising separating and separating the sheath, a laminate tape, and a cable core.
JP2002216711A 2002-07-25 2002-07-25 Dismantling method for water shielded cable Pending JP2004064826A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101070458B1 (en) 2011-03-24 2011-10-06 성광모 The regenerative apparatus and method of the waste optical cable
CN105788771A (en) * 2016-04-28 2016-07-20 台州金福桂再生资源利用有限公司 Automatic detachment processing method for waste and old wires
CN107331462A (en) * 2017-07-28 2017-11-07 杨幸 A kind of anti-interference composite cable with Bionic wear-resisting effect
CN110535075A (en) * 2019-08-28 2019-12-03 东莞市敏钜电子有限公司 A kind of wire rod processing automatic batch punck-down block convenient for collecting waste material
CN111711050A (en) * 2020-05-26 2020-09-25 闽江学院 Feeding device of wire harness peeling machine
CN115101266A (en) * 2022-08-26 2022-09-23 江苏南瑞银龙电缆有限公司 Processing device and processing method for easily stripped sheathed wire

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101070458B1 (en) 2011-03-24 2011-10-06 성광모 The regenerative apparatus and method of the waste optical cable
CN105788771A (en) * 2016-04-28 2016-07-20 台州金福桂再生资源利用有限公司 Automatic detachment processing method for waste and old wires
CN107331462A (en) * 2017-07-28 2017-11-07 杨幸 A kind of anti-interference composite cable with Bionic wear-resisting effect
CN110535075A (en) * 2019-08-28 2019-12-03 东莞市敏钜电子有限公司 A kind of wire rod processing automatic batch punck-down block convenient for collecting waste material
CN111711050A (en) * 2020-05-26 2020-09-25 闽江学院 Feeding device of wire harness peeling machine
CN115101266A (en) * 2022-08-26 2022-09-23 江苏南瑞银龙电缆有限公司 Processing device and processing method for easily stripped sheathed wire
CN115101266B (en) * 2022-08-26 2022-11-22 江苏南瑞银龙电缆有限公司 Processing device and processing method for easy-to-peel sheathed wire

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