EP0867891B1 - Datenübertragungskabel und sein Herstellungsverfahren - Google Patents

Datenübertragungskabel und sein Herstellungsverfahren Download PDF

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Publication number
EP0867891B1
EP0867891B1 EP98400664A EP98400664A EP0867891B1 EP 0867891 B1 EP0867891 B1 EP 0867891B1 EP 98400664 A EP98400664 A EP 98400664A EP 98400664 A EP98400664 A EP 98400664A EP 0867891 B1 EP0867891 B1 EP 0867891B1
Authority
EP
European Patent Office
Prior art keywords
tape
cable according
layer
cable
tapes
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
Application number
EP98400664A
Other languages
English (en)
French (fr)
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EP0867891A1 (de
Inventor
Serge Damilo
Daniel Prudhon
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.)
Nexans SA
Original Assignee
Nexans SA
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 Nexans SA filed Critical Nexans SA
Publication of EP0867891A1 publication Critical patent/EP0867891A1/de
Application granted granted Critical
Publication of EP0867891B1 publication Critical patent/EP0867891B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • H01B13/262—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of an outer metallic screen

Definitions

  • the present invention relates to a cable for data transmission comprising a conductive screen to protect one or more conductor (s) against external electromagnetic disturbances.
  • Data transmission usually takes place using conductors isolated electrical devices surrounded by a screen or several metallic screens, the screen (or screens) being enclosed in a sheath.
  • the screen isolates the conductors from external electromagnetic interference. We obtains the best protection when the conductive screen is continuous, without opening. But the usual manufacturing techniques require the use of one or more ribbons to form the screen, which necessarily leads to openings which limit the effectiveness of the screen to highest frequencies.
  • patent US-4 510 346 proposes a cable comprising at least one electrical conductor surrounded by a disturbance protection screen electromagnetic at high frequencies, the screen having, arranged in length, a ribbon interior and an exterior tape each having a conductive layer covered by a insulating layer; the inner tape has its conductive layer facing outwards and the tape outside has its conductive layer facing inwards so that these layers are applied against each other; at least one of these two ribbons has longitudinal overlapping edges.
  • This same document further discloses supplementing the screen system with a third screen applied to the previous two and consisting of a trellis or a ribbon laid helically, for increased cable efficiency at high frequencies.
  • document US-A 3,321,571 discloses a telephone cable comprising a set of individually insulated conductors which is surrounded successively paper ribbons, a first laminated plastic / metal ribbon / plastic having its edges welded lengthwise, then a second laminated tape plastic / metal / plastic also having its edges welded lengthwise, and finally an extruded outer sheath.
  • a telephone cable comprising a set of individually insulated conductors which is surrounded successively paper ribbons, a first laminated plastic / metal ribbon / plastic having its edges welded lengthwise, then a second laminated tape plastic / metal / plastic also having its edges welded lengthwise, and finally an extruded outer sheath.
  • Such a cable is made reliable by improving sealing thanks to the recommended sheathing system, which includes the two tapes welded lengthwise and provided under the extruded outer sheath.
  • the present invention aims to solve this problem by providing a cable to both effective at very high frequencies, typically above 100 MHz, and easier to strip only the known effective cables at these frequencies.
  • the present invention provides for this purpose a cable comprising at least one electrical conductor surrounded by a screen for protection against electromagnetic disturbances at high frequencies, the screen comprising, arranged in length, an inner tape comprising a conductive layer and an outer tape comprising a conductive layer covered by an insulating layer, the conductive layer of the outer tape being turned inward so that the respective conductive layers of the inner and outer tapes are applied one against the other, and at least one of the two ribbons with longitudinal overlapping edges, characterized in that the insulating material of the insulating layer of the outer tape is bonded to the inner wall of an outer sheath.
  • the cable according to the invention is protected against disturbances which may approach 1 GHz.
  • the cable according to the invention is particularly simple to connect because, when the opening of the sheath, the outer tape remains glued to the latter, and the conductive layer of the interior tape remains visible alone. The connection of the cable according to the invention to a connector is therefore facilitated.
  • the area of the longitudinal edges of the inner tape is covered by a continuous area of the outer tape. This ensures good continuity screen.
  • the areas of the longitudinal edges of the two ribbons are opposite each other.
  • the inner ribbon also consists of a layer conductive covered with an insulating layer, in polyester for example.
  • the interior and exterior ribbons can slide correctly on guides during the manufacturing. In this way the risk of deterioration by friction is minimized.
  • this outer tape can be glued to the sheath.
  • the sheath material is hot extruded at a temperature sufficient for the material plastic outer tape softens and sticks to the inner surface of the sheath.
  • An electrical continuity wire can be placed between the two screens.
  • the contact between the electrical continuity wire and the metal of one of the two tapes, preferably the metal of the inner tape is improved.
  • the cable according to the invention it is possible, for example, to hot extrude the outer sheath at a temperature such that it sticks to the insulating layer of the outer tape.
  • the interior and exterior ribbons can be preformed in the same guide. In this way the two ribbons do not move one relative to the other, which avoids the friction which could be damaging between the layer conductive inner tape and the conductive layer of the outer tape.
  • the cable 10 shown in Figure 1 is intended to transport data at high debit, especially for computer applications.
  • the cable comprises two quads 12 and 14, each quarter being formed by a set of four insulated conductors, for example 12 1 , 12 2 , 12 3 and 12 4 for the quarter 12.
  • a screen protecting the conductors against external disturbance which is formed by two ribbons, one of which, 18, surrounds the other, 16.
  • Each ribbon has two layers, namely a 25 ⁇ m aluminum layer thick and a layer of polyester 12 ⁇ m thick.
  • the polyester layer 20 of the inner tape 16 is turned inward, i.e. towards quarters 12 and 14, while the conductive layer 22 of this same tape interior 16 faces outward.
  • the inner ribbon 16 is arranged lengthwise, that is to say that its longitudinal edges 24 and 26 are along the length of the cable and the longitudinal edges 24 1 and 26 1 of the ribbon, which end in said longitudinal edges 24 and 26, overlap and remain on one side of the cable.
  • the outer ribbon 18 of constitution and dimensions identical to those of the ribbon 16. However, its polyester layer 30 is facing outward, and its conductive layer 32 is therefore facing inward.
  • the ribbon 18 is, like the inner ribbon 16, arranged lengthwise, with longitudinal edges 34 1 and 36 1 overlapped opposite the overlapped edges 24 1 and 26 1 of the inner ribbon 16.
  • a continuity wire or conductor 40 is disposed between the interior ribbons and outside.
  • the layer 30 of polyester, facing outwards, of the tape outside 18 is bonded to the internal face of the sheath 42. This bonding is carried out during extrusion of the sheath. The extrusion is carried out at a temperature high enough to that the polyester 30 of the outer tape 18 softens and thus sticks to the sheath 42.
  • the sheath 42 When it is desired to connect the cable to a connector, the sheath 42 is removed. the corresponding end. The inner ribbon 16 then remains only visible. His diaper conductive 22, facing outward, allows easy connection.
  • the two tapes 16 and 18 are preformed by the same guides (not shown).
  • FIG. 2 is a diagram on which the frequencies F, in MHz, have been plotted on the abscissa and the transfer impedance Z of the cable is plotted on the ordinate.
  • the cable performance is all the better when the impedance Z is low.
  • impedance Z represented by curve 50, presents a minimum 52 for 80 MHz approximately and that its value is satisfactory throughout the measurement range, i.e. up to 500 MHz approximately.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Claims (10)

  1. Kabel, das mindestens einen elektrischen Leiter (12, 14) aufweist und von einer Schutzabdeckung gegen elektromagnetische hochfrequente Störungen umgeben ist, wobei die Abdeckung in Längsanordnung ein Innenband (16), das eine leitende Schicht (22) aufweist, und ein Außenband (18), das eine leitende, von einer Isolierschicht (30) bedeckte Schicht (32) aufweist, aufweist, wobei die leitende Schicht (32) des Außenbandes (18) so nach innen gedreht ist, daß die jeweiligen leitenden Schichten (22, 32) des Innen- (16) und Außenbandes (18) gegeneinander angesetzt sind, und mindestens das eine der beiden Bänder überlappende Längsränder aufweist,
    dadurch gekennzeichnet, daß die Isoliersubstanz der Isolierschicht (30) des Außenbandes (18) an die Innenwand einer Außenhülle (42) geklebt ist.
  2. Kabel nach Anspruch 1, dadurch gekennzeichnet, daß die Zone der Längsränder (241, 261) des Innenbandes (16) von einer kontinuierlichen Zone (44) des Außenbandes (18) bedeckt ist.
  3. Kabel nach Anspruch 2, dadurch gekennzeichnet, daß die Zone der Längsränder (241, 261) des Innenbandes der Zone der Längsränder (341, 361) des Außenbandes gegenüberliegt.
  4. Kabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die leitenden Schichten (22, 32) der Bänder (16, 18) auf Aluminiumbasis sind.
  5. Kabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Innenband (16) eine Isolierschicht (20), beispielsweise aus Polyester, aufweist, die die leitende Schicht (22) bedeckt.
  6. Kabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Isolierschicht (30) des Außenbandes (18) aus Polyester ist.
  7. Kabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Innenband und das Außenband einen Aufbau und Abmessungen aufweisen, die im wesentlichen identisch sind.
  8. Kabel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen den beiden Bändern (16, 18) ein kontinuierlicher Leitungsdraht (40) angeordnet ist.
  9. Verfahren zur Herstellung eines Kabels nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Außenhülle (42) durch Heißextrusion bei einer Temperatur hergestellt wird, derart, daß sie an der Isolierschicht des Außenbandes (18) festklebt.
  10. Verfahren zur Herstellung eines Kabels nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Vorformen von Innen- (16) und Außenband (18) auf derselben Führung durchgeführt wird.
EP98400664A 1997-03-27 1998-03-23 Datenübertragungskabel und sein Herstellungsverfahren Expired - Lifetime EP0867891B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9703751 1997-03-27
FR9703751A FR2761515B1 (fr) 1997-03-27 1997-03-27 Cable pour la transmission de donnees et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0867891A1 EP0867891A1 (de) 1998-09-30
EP0867891B1 true EP0867891B1 (de) 2002-07-03

Family

ID=9505230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98400664A Expired - Lifetime EP0867891B1 (de) 1997-03-27 1998-03-23 Datenübertragungskabel und sein Herstellungsverfahren

Country Status (4)

Country Link
US (1) US6259019B1 (de)
EP (1) EP0867891B1 (de)
DE (1) DE69806295T2 (de)
FR (1) FR2761515B1 (de)

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US6664466B2 (en) * 2000-05-19 2003-12-16 Spirent Communications Of Rockville, Inc. Multiple shielded cable
US6486395B1 (en) * 2000-06-22 2002-11-26 Alflex Corporation Interlocked metal-clad cable
JP4914539B2 (ja) * 2001-05-18 2012-04-11 矢崎総業株式会社 シールドハーネスの組立方法
DE102005017381A1 (de) * 2005-04-14 2006-10-19 Tesa Ag Verfahren zum Ummanteln von langgestrecktem Gut, wie insbesondere Kabelsätzen, mit einer Umhüllung
US7145080B1 (en) 2005-11-08 2006-12-05 Hitachi Cable Manchester, Inc. Off-set communications cable
FR2893177B1 (fr) * 2005-11-10 2008-09-05 Nexans Sa Cable electrique avec ecran ameliore
GB0610131D0 (en) * 2006-05-20 2006-06-28 Penny & Giles Aerospace Ltd Fireproof enclosure
US20070272430A1 (en) * 2006-05-26 2007-11-29 Tuffile Charles D Asymmetric communication cable shielding
US7754969B2 (en) 2007-06-08 2010-07-13 Southwire Company Armored cable with integral support
FR2921512B1 (fr) * 2007-09-25 2012-10-05 Rayponse Gaine de protection a l'egard du rayonnement, notamment du champ electrique engendre par des cables electriques
US7827678B2 (en) * 2008-06-12 2010-11-09 General Cable Technologies Corp. Longitudinal shield tape wrap applicator with edge folder to enclose drain wire
US7880089B1 (en) 2008-06-13 2011-02-01 Southwire Company Metal-clad cable assembly
US8124875B2 (en) * 2009-01-27 2012-02-28 Nexans Aluminum grounding cable for metal and non metal sheathed electrical cables
US10141086B2 (en) * 2009-12-01 2018-11-27 Lenovo Enterprise Solutions (Singapore) Pte. Ltd. Cable for high speed data communications
JP5675329B2 (ja) * 2010-12-27 2015-02-25 矢崎総業株式会社 導電路シールド構造、及び、ワイヤハーネス
JP5722616B2 (ja) * 2010-12-27 2015-05-27 矢崎総業株式会社 導電路シールド構造、及びワイヤハーネス
JP5704127B2 (ja) * 2012-06-19 2015-04-22 日立金属株式会社 多対差動信号伝送用ケーブル
US20140026411A1 (en) * 2012-07-24 2014-01-30 Barnesandnoble.Com, Llc Techniques for efficient wire routing in a device
US9209441B2 (en) 2013-01-24 2015-12-08 Nook Digital, Llc Method for split wire routing in a cavity for a device
US9144171B2 (en) 2013-01-24 2015-09-22 Nook Digital, Llc Apparatus for split wire routing in a bracket for a device
CN104252915B (zh) * 2013-06-28 2017-10-20 日立金属株式会社 差分信号传送用电缆
JP2015130326A (ja) * 2013-12-10 2015-07-16 デルファイ・テクノロジーズ・インコーポレーテッド 遮蔽ケーブルアセンブリ
JP6065855B2 (ja) * 2014-02-19 2017-01-25 日立金属株式会社 ノイズ抑制ケーブル
US10147523B2 (en) * 2014-09-09 2018-12-04 Panasonic Avionics Corporation Cable, method of manufacture, and cable assembly
US10361015B1 (en) * 2015-12-10 2019-07-23 Encore Wire Corporation Metal-clad multi-circuit electrical cable assembly
US11538606B1 (en) 2015-12-10 2022-12-27 Encore Wire Corporation Metal-clad multi-circuit electrical cable assembly
JP6673071B2 (ja) * 2016-07-19 2020-03-25 株式会社オートネットワーク技術研究所 シールド部材、シールド部材付電線、シールド部材の中間製造物及びシールド部材の製造方法
ES2873930T3 (es) * 2017-09-05 2021-11-04 Nkt Cables Group As Cable de alimentación eléctrica de baja tensión
JP7006749B1 (ja) * 2020-09-30 2022-01-24 日立金属株式会社 多芯ケーブル及び信号伝送路

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US3321572A (en) * 1965-09-13 1967-05-23 Gen Cable Corp Dual laminated telephone cable sheath
US4510346A (en) * 1983-09-30 1985-04-09 At&T Bell Laboratories Shielded cable
US5144098A (en) * 1990-03-08 1992-09-01 W. L. Gore & Associates, Inc. Conductively-jacketed electrical cable
GB2249212B (en) * 1990-08-21 1994-06-01 Yoshida Kogyo Kk Metal-shielded cable suitable for electronic devices
US5132491A (en) * 1991-03-15 1992-07-21 W. L. Gore & Associates, Inc. Shielded jacketed coaxial cable
US5208426A (en) * 1991-09-03 1993-05-04 W. L. Gore & Associates, Inc. Shielded electric signal cable having a two-layer semiconductor jacket
US5541361A (en) * 1994-12-20 1996-07-30 At&T Corp. Indoor communication cable
EP0759624A1 (de) * 1995-08-19 1997-02-26 Alcatel Kabel AG & Co. Elektrisches Kabel zur Nachrichtenübertragung

Also Published As

Publication number Publication date
US6259019B1 (en) 2001-07-10
FR2761515B1 (fr) 1999-04-30
EP0867891A1 (de) 1998-09-30
DE69806295T2 (de) 2002-11-28
DE69806295D1 (de) 2002-08-08
FR2761515A1 (fr) 1998-10-02

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