EP0422306B1 - Câble de communication - Google Patents
Câble de communication Download PDFInfo
- Publication number
- EP0422306B1 EP0422306B1 EP89402777A EP89402777A EP0422306B1 EP 0422306 B1 EP0422306 B1 EP 0422306B1 EP 89402777 A EP89402777 A EP 89402777A EP 89402777 A EP89402777 A EP 89402777A EP 0422306 B1 EP0422306 B1 EP 0422306B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- communication cable
- intermediate layer
- cable according
- layer
- polyethylene
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
-
- 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
- H01B11/1058—Screens specially adapted for reducing interference from external sources using a coating, e.g. a loaded polymer, ink or print
- H01B11/1066—Screens specially adapted for reducing interference from external sources using a coating, e.g. a loaded polymer, ink or print the coating containing conductive or semiconductive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/187—Sheaths comprising extruded non-metallic layers
Definitions
- the present invention relates to a thin communication cable which is non-sensitive to moisture from an electrical point of view.
- a communication cable is especially intended for use in frequencies up to and including the MHz-region.
- the cable is provided with at least two electric conductors and a surrounding sheath.
- a conventional field thin cable including one, two, or more, pairs of insulated communication wires intended for use at frequencies up to and including the MHz-region, with surrounding sheath, can get an electric line attenuation increase of more than 100% at for instance drizzle at the frequency 1.024 MHz which is considerably more than previously used frequencies.
- the purpose of the invention is therefore in the first place to provide a communication cable, the electric line attenuation of which holds a low and continuous level also when the cable is subjected to moisture or varying external environment with respect to the weather conditions when using one and the same frequency.
- the sheath is composed of three different, mutually combined layers - an internal layer, an external layer and an intermediate layer - and that the intermediate layer consists of a semiconductor material.
- Said electrical line attenuation can be of the magnitude ⁇ 14 dB/km at 1.024 MHz.
- the Fig. shown on the enclosed drawing discloses a section of a communication cable which is formed according to the principles of the invention.
- the communication cable 10 in said Fig. is a so-called two-wire-cable but the invention can, of course, be applicable to a cable with two or more pairs of wires.
- the communication cable comprises two similar separate electric conductors 12, each consisting of a polyethylene insulated tinned copper wire 14.
- the cable also comprises two tension relieve elements 16, which in this case each consists of a polyethylene insulated stainless steel wire 18.
- the two insulated conductors 12 and the two insulated steel wires 16 are twisted to a compact quad in a manner known per se.
- the wires 16 and the conductors 12 are surrounded by a sheath which has been fill extruded around the whole quad.
- the sheath is composed of three different mutually combined layers.
- the layers consist of plastic, preferably polyethylene.
- the internal layer 20 and the external layer 22 are non-conducting but the intermediate layer 24 is semi-conducting.
- the assembly has been made by melting the three layers in one single moment but, of course, the use of glue or some other assembly method may be imagined.
- the internal layer 20 of polyethylene can have a low density, whilst the external layer 22 shall consist of a durable plastic with a high density or another durable plastic, for instance polyamide.
- the intermediate layer 24 should have a volume resistivity suitable for the line attenuation level, preferably of the magnitude 102 ⁇ cm, at at temperature of 20°. For the purpose intended it is suitable that the internal layer 20 is between four and six times thicker than the intermediate layer 24.
- the sheath on the whole must be proportionately thin, for the exemplified two-wire-cable about 0.6 mm, in which case the intermediate layer 24 should have a thickness ⁇ 0.10 mm.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Insulated Conductors (AREA)
- Communication Cables (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Claims (7)
- Fin câble de télécommunication (10), comportant une, deux, ou davantage, paires de conducteurs de télécommunication isolées, pour emploi à des fréquences allant jusqu'à et y compris la bande des MHz, comportant une gaine (20, 22, 24) qui l'entoure, caractérisé par le fait que la gaine est composée de trois couches différentes, mutuellement combinées - une couche intérieure isolante (20), une couche extérieure isolante (22) et une couche intermédiaire (24) - et que la couche intermédiaire (24) est constituée d'un matériau semi-conducteur, de sorte que le câble, en tant que câble de transmission de signaux électriques, n'est pas sensible à l'humidité.
- Câble de télécommunication selon la revendication 1, caractérisé par le fait que les couches (20, 22, 24) sont constituées de plastique.
- Câble de télécommunication selon la revendication 1 ou 2, caractérisé par le fait que les trois couches (20, 22, 24) sont réunies par fusion à l'extrusion en une seule étape.
- Câble de télécommunication selon l'une quelconque des revendications 1-3, caractérisé par le fait que la couche intérieure (20) est constituée de polyéthylène basse densité, que la couche extérieure (23) est constituée de polyéthylène haute densité ou de polyamide et que la couche intermédiaire (24) est constituée de polyéthylène semi-conducteur.
- Câble de télécommunication selon la revendication 4, caractérisé par le fait que la résistivité volumique de la couche intermédiaire (24) est de l'ordre de grandeur de 10² Ω.cm.
- Câble de télécommunication selon l'une quelconque des revendications 1-5 caractérisé par le fait que l'épaisseur de la couche intérieure (20) vaut entre 4 et 6 fois l'épaisseur de la couche intermédiaire (24).
- Câble de télécommunication selon la revendication 2, caractérisé par le fait que les couches (20, 22, 24) sont constituées de polyéthylène.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE68924915T DE68924915T2 (de) | 1989-10-09 | 1989-10-09 | Nachrichtenkabel. |
AT89402777T ATE130697T1 (de) | 1989-10-09 | 1989-10-09 | Nachrichtenkabel. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8803126A SE468871B (sv) | 1988-09-06 | 1988-09-06 | Klen kommunikationskabel avsedd foer frekvenser upp till och med mhz-omraadet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0422306A1 EP0422306A1 (fr) | 1991-04-17 |
EP0422306B1 true EP0422306B1 (fr) | 1995-11-22 |
Family
ID=20373236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89402777A Expired - Lifetime EP0422306B1 (fr) | 1988-09-06 | 1989-10-09 | Câble de communication |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0422306B1 (fr) |
AU (1) | AU620131B2 (fr) |
DK (1) | DK169932B1 (fr) |
FI (1) | FI95419C (fr) |
NO (1) | NO176458C (fr) |
SE (1) | SE468871B (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2712115A1 (fr) * | 1993-11-05 | 1995-05-12 | Filotex Sa | Câble blindé, à faible niveau de bruit et de température de service élevée. |
AU5191801A (en) | 2001-06-14 | 2002-12-19 | Pirelli Cables Australia Limited | Communications cable provided with a crosstalk barrier for use at high transmission frequencies |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3668298A (en) * | 1969-12-10 | 1972-06-06 | Bell Telephone Labor Inc | Multiconductor communications cable |
WO1988006741A1 (fr) * | 1987-03-03 | 1988-09-07 | Union Carbide Benelux N.V. | Cable renfermant une matiere arretant l'eau |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO140249C (no) * | 1977-04-28 | 1979-07-25 | Elektrisitetsforsyning | Sterkstroemkabel som er motstandsdyktig overfor dannelse av vanntraer i isolasjonen samt fremgangsmaate for fremstilling av slik kabel |
US4486252A (en) * | 1980-10-08 | 1984-12-04 | Raychem Corporation | Method for making a low noise cable |
-
1988
- 1988-09-06 SE SE8803126A patent/SE468871B/sv not_active IP Right Cessation
-
1989
- 1989-08-24 AU AU40152/89A patent/AU620131B2/en not_active Ceased
- 1989-08-24 NO NO893402A patent/NO176458C/no unknown
- 1989-09-01 FI FI894129A patent/FI95419C/fi not_active IP Right Cessation
- 1989-09-05 DK DK437789A patent/DK169932B1/da not_active IP Right Cessation
- 1989-10-09 EP EP89402777A patent/EP0422306B1/fr not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3668298A (en) * | 1969-12-10 | 1972-06-06 | Bell Telephone Labor Inc | Multiconductor communications cable |
WO1988006741A1 (fr) * | 1987-03-03 | 1988-09-07 | Union Carbide Benelux N.V. | Cable renfermant une matiere arretant l'eau |
Also Published As
Publication number | Publication date |
---|---|
FI894129A (fi) | 1990-03-07 |
AU620131B2 (en) | 1992-02-13 |
EP0422306A1 (fr) | 1991-04-17 |
FI95419B (fi) | 1995-10-13 |
AU4015289A (en) | 1990-03-15 |
DK437789A (da) | 1990-03-07 |
NO176458C (no) | 1995-04-05 |
FI95419C (fi) | 1996-01-25 |
DK437789D0 (da) | 1989-09-05 |
SE468871B (sv) | 1993-03-29 |
DK169932B1 (da) | 1995-04-03 |
NO893402D0 (no) | 1989-08-24 |
FI894129A0 (fi) | 1989-09-01 |
NO176458B (no) | 1994-12-27 |
SE8803126L (sv) | 1990-03-07 |
NO893402L (no) | 1990-03-07 |
SE8803126D0 (sv) | 1988-09-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5003126A (en) | Shielded flat cable | |
CA1160300A (fr) | Cable transducteur tribo-electrique | |
US5132491A (en) | Shielded jacketed coaxial cable | |
CA1174309A (fr) | Cables electriques a blindages ameliores | |
US6566605B1 (en) | Multiple pair cable with individually shielded pairs that is easy to connect | |
US4468089A (en) | Flat cable of assembled modules and method of manufacture | |
US4453031A (en) | Multi-compartment screened telephone cables | |
US3622683A (en) | Telephone cable with improved crosstalk properties | |
US5037999A (en) | Conductively-jacketed coaxial cable | |
US4323721A (en) | Electric cables with improved shielding member | |
US5313020A (en) | Electrical cable | |
US5208426A (en) | Shielded electric signal cable having a two-layer semiconductor jacket | |
US5298682A (en) | Optimized symmetrical coaxial cable | |
US4185162A (en) | Multi-conductor EMF controlled flat transmission cable | |
US4639693A (en) | Strip line cable comprised of conductor pairs which are surrounded by porous dielectric | |
US4754102A (en) | Directional interconnection cable for high fidelity signal transmission | |
US4680423A (en) | High performance flat cable | |
US6563052B2 (en) | Electric installation cable | |
AU5310786A (en) | Insulated cable with strippable layers | |
JPH05120930A (ja) | 遮蔽効果を高めた電線・ケーブル製品 | |
US5262589A (en) | High velocity propagation ribbon cable | |
EP0161065B1 (fr) | Ligne de transmission électrique | |
US4943688A (en) | Ribbon coaxial cable with offset drain wires | |
EP0422306B1 (fr) | Câble de communication | |
US6333465B1 (en) | Data transmission cable |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19911014 |
|
17Q | First examination report despatched |
Effective date: 19930308 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19951122 Ref country code: BE Effective date: 19951122 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19951122 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19951122 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19951122 |
|
REF | Corresponds to: |
Ref document number: 130697 Country of ref document: AT Date of ref document: 19951215 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 68924915 Country of ref document: DE Date of ref document: 19960104 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: JUERG ULRICH C/O ALCATEL STR AG |
|
ET | Fr: translation filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19961009 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19961031 |
|
26N | No opposition filed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19961009 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19990915 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19990920 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19990923 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990927 Year of fee payment: 11 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001009 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 20001030 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001031 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001031 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
EUG | Se: european patent has lapsed |
Ref document number: 89402777.0 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010703 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20051014 Year of fee payment: 17 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20070629 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20061031 |