EP0155430A1 - Process for manufacturing a fill material for lengthwise water-tight electric and/or optical cable - Google Patents
Process for manufacturing a fill material for lengthwise water-tight electric and/or optical cable Download PDFInfo
- Publication number
- EP0155430A1 EP0155430A1 EP84730144A EP84730144A EP0155430A1 EP 0155430 A1 EP0155430 A1 EP 0155430A1 EP 84730144 A EP84730144 A EP 84730144A EP 84730144 A EP84730144 A EP 84730144A EP 0155430 A1 EP0155430 A1 EP 0155430A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow bodies
- water
- repellent
- substance
- wax
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 230000003287 optical effect Effects 0.000 title claims description 3
- 150000001875 compounds Chemical class 0.000 claims abstract description 15
- 235000019271 petrolatum Nutrition 0.000 claims abstract description 8
- 239000004264 Petrolatum Substances 0.000 claims abstract description 4
- 229940066842 petrolatum Drugs 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 13
- 239000005871 repellent Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 238000005187 foaming Methods 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000003380 propellant Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 4
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QSAMQSXFHVHODR-UHFFFAOYSA-N Cl.C=CC#N Chemical compound Cl.C=CC#N QSAMQSXFHVHODR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/2855—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using foamed plastic
-
- 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
- H01B13/32—Filling or coating with impervious material
- H01B13/322—Filling or coating with impervious material the material being a liquid, jelly-like or viscous substance
-
- 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
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
Definitions
- the invention relates to a method for producing a filling compound for the longitudinal sealing of an electrical and / or optical cable, in particular a communication cable, the filling compound consisting of a mixture of a water-repellent, wax-like substance (e.g. petrolatum) with micro-small hollow bodies made of elastic plastic, and to a method for filling a cable with the aforementioned filler.
- a water-repellent, wax-like substance e.g. petrolatum
- the wall of the hollow body consists of an elastic material such that the hollow bodies can be compressed under the influence of greater forces to a volume that is less than half of the original volume and the if these forces are no longer present, assume their original volume and shape again (DE-PS 31 50 909).
- the spatial extent of individual undeformed hollow bodies is ⁇ 100 ⁇ m.
- Hollow bodies of this type are produced by means of special processes from plastics on the basis of polyvinylidene chloride copolymer, the process being carried out in such a way that isobutane as the propellant gas has entered the hollow bodies and the hollow bodies have an average spatial extent (diameter of ⁇ 10 pm).
- the foaming process in which the volume of the hollow bodies increases approximately 10 to 100 times, is then carried out with the supply of thermal energy.
- air is mixed into the mass during the mixing process. This air is very annoying because it separates in the cable and can lead to the formation of channels, which makes the cable permeable to water again in the longitudinal direction.
- the filling compound produced in this way must therefore be degassed before it is filled into a cable. It is also disadvantageous that the already foamed hollow bodies are subjected to considerable mechanical loads during the mixing process, so that part of the bodies are destroyed in the process, whereby the value of the dielectric constant increases in an undesirable manner.
- the invention is therefore based on the object of a method for mixing water-repellent, wax-like substances, such as. Petrolat, to indicate with hollow bodies, which is free from the aforementioned disadvantages.
- foamable hollow bodies are mixed before foaming with the water-repellent, wax-like substance at a temperature at which the viscosity of the substance is low (quasi-liquid), but the foaming of the hollow bodies does not yet occur and that the expansion takes place after the mixing process has ended by supplying heat.
- the water-repellent, wax-like substance will preferably be selected so that it releases propellant gas emerging from the hollow bodies during the expansion process. This prevents unwanted gas pockets in the filling compound.
- a device for carrying out the method according to the invention will preferably be designed so that the heat is supplied via continuous heat exchangers.
- the low dielectric constant can only be achieved if all the hollow bodies go through the same defined heat-time program in the heating process.
- the hollow plastic bodies are exposed to the expansion temperature for too long, there is a risk that they will collapse. It is therefore difficult to heat up the filling compound in significant layer thicknesses (approximately of the order of magnitude 1 cm) solely by heat conduction.
- the heat is supplied via a continuous heat exchanger, which is preferably designed so that the mixture to be heated can be contacted in thin layers with the heat source, there are no difficulties with the homogeneous heating of the filling compound.
- pure petroleum jelly as is usually used for the longitudinal sealing of cables or the like, with a dielectric constant of approximately 2.3 and of foamable plastic hollow bodies made of polyvinylidene chloride acrylonitrile copolymer with a dielectric constant of approximately 4 and a starting temperature of the hollow body expansion of about 90 ° C.
- the petroleum jelly has previously been heated to about 85 ° C, being careful not to exceed this value.
- the mixture obtained is passed through a heat exchanger in thin layers, the heating surface temperature of which is approximately 125 ° C.
- the mixture is guided in such a way that the residence time in the heat exchanger does not exceed 60 seconds. If you increase the heating surface temperature to 130 ° C, the dwell time must be limited to 30 seconds.
- the mass When leaving the heat exchanger, the mass has a temperature of approx. 115 ° C.
- the hollow bodies are foamed, the mass is cooled to 60 ° C in a further heat exchanger and can then be filled directly into a cable.
- the filling compound produced in this way has a specific density of 0.42, a dielectric constant of about 1.5 and has 56 percent by volume of hollow body.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
Zum Herstellen einer Füllmasse für längswasserdichte Kabel, die auf Petrolatbasis fußt und mit mikrokleinen Hohlkörpern gemischt ist, erfolgt der Mischprozeß vor dem Aufschäumen der Hohlkörper.In order to produce a filling compound for longitudinally watertight cables, which is based on petrolatum and is mixed with micro-small hollow bodies, the mixing process takes place before the hollow bodies are foamed.
Description
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen einer Füllmasse zum Längsdichten eines elektrischen und/oder optischen Kabels, insbesondere eines Nachrichtenkabels, wobei die Füllmasse aus einer Mischung einer wasserabstoßenden wachsartiqen Substanz (z. B. Petrolat) mit mikrokleinen Hohlkörpern aus elastischem Kunststoff besteht und auf ein Verfahren zum Füllen eines Kabels mit der zuvor erwähnten Füllmasse.The invention relates to a method for producing a filling compound for the longitudinal sealing of an electrical and / or optical cable, in particular a communication cable, the filling compound consisting of a mixture of a water-repellent, wax-like substance (e.g. petrolatum) with micro-small hollow bodies made of elastic plastic, and to a method for filling a cable with the aforementioned filler.
Bei Kabeln besteht die Gefahr, daß sich die bei einer Beschädiqung des Kabelmantels eindringende Feuchtigkeit längs des Kabels ausbcreiten kann und so die elektrischen Eigenschaften des Kabels nachhaltig verschlechtert werden. Dieses Problem ist seit längerer Zeit bekannt. Es gibt daher zahlreiche Vorschläge, wie man dem Vordringen des Wassers in der Kabelseele Einhalt gebieten kann. Aus diesen Vorschlägen hat sich in letzter Zeit mit recht gutem Erfolg das Füllen von Kabeln mit kunststoffisolierten Adern, insbesondere von Nachrichtenkabeln, mit einer als Petrolat bezeichneten wachsartigen Masse durchgesetzt (GB-PS 987 508).In the case of cables, there is a risk that the moisture penetrating in the event of damage to the cable sheath can spread along the cable and the electrical properties of the cable may be permanently impaired. This problem has been known for a long time. There are therefore numerous suggestions on how to stop the penetration of water in the cable core. From these proposals, the filling of cables with plastic-insulated cores, in particular communication cables, with a wax-like mass called petrolat has recently become quite successful (GB-PS 987 508).
Die als Petrolat bezeichnete Füllmasse, die eine Dielektrizitätszahl von etwa 2,3 hat, setzt aber die.Betriebskapazität von damit gefüllten Kabeln um ungefähr 20 % herauf. Aus diesem Grunde ist bereits vor einiger Zeit vorqeschlagen worden, dieser Füllmasse mikrokleine Hohlkörper beizumischen, um so gasgefüllte, abgekapselte Bereiche im Kabel zu schaffen und damit die Dielektrizitätszahl zu verbessern (DE-PS 19 36 872). Besonders gute ErfolgeHowever, the filling compound called petrolat, which has a dielectric constant of around 2.3, increases the operating capacity of cables filled with it by around 20%. For this reason, it was proposed some time ago to add micro-small hollow bodies to this filling compound in order to create gas-filled, encapsulated areas in the cable and thus to improve the dielectric constant (DE-PS 19 36 872). Particularly good results
werden rit einer Füllmasse aus Petrolat und mikrokleinen Hohlkörpern erzielt, bei der die Wandung der Hohlkörper aus einem elastischen Stoff solcher Art besteht, daß sich die Hohlkörper unter dem Einfluß größerer Kräfte auf ein Volumen zusammendrücken lassen, das geringer als die Hälfte des Ursprungsvolumens ist und die bei nicht mehr Vorhandensein dieser Kräfte ihr ursprüngliches Volumen und ihre Gestalt wieder annehmen (DE-PS 31 50 909). Dabei ist die räumliche Ausdehnung einzelner nicht verformter Hohlkörper < 100 µm.are achieved with a filling of petroleum jelly and micro-small hollow bodies, in which the wall of the hollow body consists of an elastic material such that the hollow bodies can be compressed under the influence of greater forces to a volume that is less than half of the original volume and the if these forces are no longer present, assume their original volume and shape again (DE-PS 31 50 909). The spatial extent of individual undeformed hollow bodies is <100 µm.
Derartige Hohlkörper werden nach speziellen Verfahren aus Kunststoffen auf der Basis von PolyvinylidenchloridCopolymer hergestellt, wobei das Verfahren so geführt wird, daß in die Hohlkörper Isobutan als Treibgas gelangt ist und die Hohlkörper eine durchschnittliche räumliche Ausdehnung (Durchmesser von < 10 pm) aufweisen. Unter Zufuhr von Wärmeenergie wird dann der Aufschäumprozeß durchgeführt, bei dem sich das Volumen der Hohlkörper etwa auf das 10 - 100fache vergrößert.Hollow bodies of this type are produced by means of special processes from plastics on the basis of polyvinylidene chloride copolymer, the process being carried out in such a way that isobutane as the propellant gas has entered the hollow bodies and the hollow bodies have an average spatial extent (diameter of <10 pm). The foaming process, in which the volume of the hollow bodies increases approximately 10 to 100 times, is then carried out with the supply of thermal energy.
Eine Füllmasse mit den oben erwähnten Eigenschaften, die eine Dielektrizitätszahl von etwa 1,6 bis 1,3 aufweist, hat man bisher in der Weise hergestellt, daß Hohlkörper auf Kunststoffbasis zunächst'aufqeschäumt und dann mit einer wasserabweisenden, wachsartigen Substanz gemischt werden. Dabei ist jedoch nicht zu vermeiden, daß beim Mischvorgang Luft in die Masse untergerührt wird. Diese Luft ist sehr störend, weil sie im Kabel separiert und zur Ausbildung von Kanälen führen kann, wodurch das Kabel in Längsrichtung wieder wasserdurchlässig wird. Die so erzeugte Füllmasse muß daher vor dem Einfüllen in ein Kabel entgast werden. Außerdem ist nachteilig, daß die bereits aufgeschäumten Hohlkörper bei dem Mischvorgang erheblich mechanisch belastet werden, so daß ein Teil der Körper dabei zerstört wird, wodurch der Wert der Dielektrizitätszahl sich in unerwünschter Weise erhöht.A filling compound with the properties mentioned above, which has a dielectric constant of about 1.6 to 1.3, has hitherto been produced in such a way that plastic-based hollow bodies are first foamed and then mixed with a water-repellent, wax-like substance. However, it cannot be avoided that air is mixed into the mass during the mixing process. This air is very annoying because it separates in the cable and can lead to the formation of channels, which makes the cable permeable to water again in the longitudinal direction. The filling compound produced in this way must therefore be degassed before it is filled into a cable. It is also disadvantageous that the already foamed hollow bodies are subjected to considerable mechanical loads during the mixing process, so that part of the bodies are destroyed in the process, whereby the value of the dielectric constant increases in an undesirable manner.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zum Mischen von wasserabstoßenden, wachsartigen Substanzen, wie z. Petrolat, mit Hohlkörpern anzugeben, das frei von den zuvor erwähnten Nachteilen ist. Zur Lösung dieser Aufgabe wird gemäß der Erfindung vorgeschlagen, daß aufschäumbare Hohlkörper vor dem Verschäumen mit der wasserabstoßenden, wachsartigen Substanz bei einer Temperatur gemischt werden, bei der die Viskosität der Substanz gering (quasiflüssig) ist, aber die Verschäumung der Hohlkörper noch nicht einsetzt und daß das Expandieren nach beendetem Mischvorqang durch Wärmezufuhr erfolgt.The invention is therefore based on the object of a method for mixing water-repellent, wax-like substances, such as. Petrolat, to indicate with hollow bodies, which is free from the aforementioned disadvantages. To achieve this object, it is proposed according to the invention that foamable hollow bodies are mixed before foaming with the water-repellent, wax-like substance at a temperature at which the viscosity of the substance is low (quasi-liquid), but the foaming of the hollow bodies does not yet occur and that the expansion takes place after the mixing process has ended by supplying heat.
Auf diese Weise bereitet das Mischen von einer wasserabweisenden, wachsartigen Substanz mit den noch nicht expandierten Hohlkörpern, die ein wesentlich kleineres Volumen als bereits aufgeschäumte aufweisen, nahezu keine Probleme. Wegen der geringen Viskosität der wasserabweisenden Substanz beim Mischvorgang muß die Füllmasse auch nicht mehr vor dem Einfüllen in ein Kabel o. dgl. entgast werden. Bei einem geringfügigen Anteil von etwa 2 bis 5 Volumenprozent bleiben die physikalischen Eigenschaften der erhaltenen Mischung dem der reinen wasseerabstoßenden Substanz nahezu gleich, so daß die Viskosität der Mischung durch Temperaturerhöhung auf einen quasiflüssigen Zustand herabgesetzt werden kann, ohne daß die Verschäumungstemperatur erreicht wird. Bei diesem Mischen kann die gewünschte Dielektrizitätszahl auf nahezu zwei Stellen. hinter dem Komma exakt eingestellt werden.In this way, mixing a water-repellent, wax-like substance with the not yet expanded hollow bodies, which have a much smaller volume than already foamed, poses almost no problems. Because of the low viscosity of the water-repellent substance during the mixing process, the filling compound no longer has to be degassed before it is filled into a cable or the like. With a small proportion of about 2 to 5 percent by volume, the physical properties of the mixture obtained remain almost the same as that of the pure water-repellent substance, so that the viscosity of the mixture can be reduced to a quasi-liquid state by increasing the temperature without reaching the foaming temperature. With this mixing, the desired dielectric constant can be set to almost two places. can be set exactly after the comma.
Die wasserabweisende, wachsartige Substanz wird man vorzugsweise so auswählen, daß sie aus den Hohlkörpern beim Expansionsprozeß austretendes Treibgas löst. Dadurch weerden unerwünschte Gasnester in der Füllmasse verhindert. Außerdem kann man problemlos brennbares Treibgas verwenden, weil wegen der Sorption des Gases von der wasserabweisenden Substanz kein zündbares Gasgemisch entstehen kann.The water-repellent, wax-like substance will preferably be selected so that it releases propellant gas emerging from the hollow bodies during the expansion process. This prevents unwanted gas pockets in the filling compound. In addition, one can use combustible propellant gas without any problems because, due to the sorption of the gas by the water-repellent substance, no ignitable gas mixture can arise.
Eine Vorrichtung zur Durchführung des Verfahrens gemäß der Erfindung wird man vorzugsweise so ausbilden, daß die Wärmezufuhr über Durchlaufwärmeaustauscher erfolgt. Bei der Füllmasse kann nämlich die niedrige Dielektrizitätszahl nur dann erreicht werden, wenn alle Hohlkörper das gleiche definierte Wärme-Zeit-Programm bei dem Erwärmungsprozeß durchlaufen. Werden aber die Kunststoffhohlkörper zu lange der Expansionstemperatur ausgesetzt, besteht Gefahr, daß sie kollabieren. Es ist daher schwierig, die Füllmasse in nennenswerten Schichtdicken (etwa von der Größenordnung 1 cm) allein durch Wärmeleitung aufzuwärmen. Erfolgt die Wärmezufuhr jedoch über einen Durchlauf Wärmeaustauscher, der vorzugsweise so ausgebildet ist, daß die zu erwärmende Mischung in dünnen Schichten mit der Wärmequelle kontaktierbar ist, so entstehen bei der homogenen Erwärmung der Füllmasse keine Schwierigkeiten.A device for carrying out the method according to the invention will preferably be designed so that the heat is supplied via continuous heat exchangers. In the case of the filling compound, the low dielectric constant can only be achieved if all the hollow bodies go through the same defined heat-time program in the heating process. However, if the hollow plastic bodies are exposed to the expansion temperature for too long, there is a risk that they will collapse. It is therefore difficult to heat up the filling compound in significant layer thicknesses (approximately of the order of magnitude 1 cm) solely by heat conduction. However, if the heat is supplied via a continuous heat exchanger, which is preferably designed so that the mixture to be heated can be contacted in thin layers with the heat source, there are no difficulties with the homogeneous heating of the filling compound.
Die Erfindung wird anhand eines Beispieles im einzelnen erläutert.The invention is explained in detail using an example.
Es wird ausgegangen von reinem Petrolat, wie es üblicherweise zum Längsdichten von Kabeln o. dgl. Verwendung findet, mit einer Dielektrizitätszahl von etwa 2,3 und von verschäumbaren Kunststoffhohlkörpern aus Polyvinylidenchlorid Acrylnitril-Copolymer mit einer Dielektrizitätszahl von ca. 4 und einer Starttemperatur der Hohlkörperexpansion von etwa 90 °C.It is assumed that pure petroleum jelly, as is usually used for the longitudinal sealing of cables or the like, with a dielectric constant of approximately 2.3 and of foamable plastic hollow bodies made of polyvinylidene chloride acrylonitrile copolymer with a dielectric constant of approximately 4 and a starting temperature of the hollow body expansion of about 90 ° C.
Es werden etwa 97 Volumenprozent Petrolat mit 3 Volumenprozent der Hohlkörper gemischt. Zuvor ist das Petrolat auf etwa 85 °C erwärmt worden, wobei genau darauf geachtet wird, daß dieser Wert nicht überschritten wird. Nach sorgfältigem Mischen wird die erhaltene Mischung durch einen Wärmetauscher in dünnen Schichten geführt, dessen Heizflächentemperatur etwa 125 °C beträgt. Die Führung der Mischung erfolgt so, daß die Verweilzeit im Wärmetauscher 60 Sekunden nicht überschreitet. Erhöht man die Heizflächentemperatur auf 130 °C, muß die Verweilzeit auf 30 Sekunden begrenzt werden. Beim Austritt aus dem Wärmetauscher hat die Masse eine Temperatur von ca. 115 °C. Die Hohlkörper sind aufgeschäumt, die Masse wird in einem weiteren Wärmetauscher auf 60 °C abgekühlt und kann dann unmittelbar in ein Kabel einqefüllt werden. Die so hergestellte Füllmasse hat eine spezifische Dichte von 0,42, eine Dielektrizitätszahl von etwa 1,5 und weist 56 Volumenprozent Hohlkörperanteil auf.About 97 volume percent of petroleum jelly are mixed with 3 volume percent of the hollow bodies. The petroleum jelly has previously been heated to about 85 ° C, being careful not to exceed this value. After careful mixing, the mixture obtained is passed through a heat exchanger in thin layers, the heating surface temperature of which is approximately 125 ° C. The mixture is guided in such a way that the residence time in the heat exchanger does not exceed 60 seconds. If you increase the heating surface temperature to 130 ° C, the dwell time must be limited to 30 seconds. When leaving the heat exchanger, the mass has a temperature of approx. 115 ° C. The hollow bodies are foamed, the mass is cooled to 60 ° C in a further heat exchanger and can then be filled directly into a cable. The filling compound produced in this way has a specific density of 0.42, a dielectric constant of about 1.5 and has 56 percent by volume of hollow body.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843404487 DE3404487A1 (en) | 1984-02-06 | 1984-02-06 | METHOD FOR PRODUCING A FILLING MEASUREMENT FOR LONG-TERM WATERPROOF ELECTRICAL AND / OR OPTICAL CABLES |
| DE3404487 | 1984-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0155430A1 true EP0155430A1 (en) | 1985-09-25 |
Family
ID=6227158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84730144A Ceased EP0155430A1 (en) | 1984-02-06 | 1984-12-18 | Process for manufacturing a fill material for lengthwise water-tight electric and/or optical cable |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0155430A1 (en) |
| DE (1) | DE3404487A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0271171A1 (en) * | 1986-12-11 | 1988-06-15 | Lantor B.V. | Expandable tape for cables, the use thereof, and cables |
| EP0279718A1 (en) * | 1987-01-20 | 1988-08-24 | NORDLYS, Société Anonyme dite: | Water-tight material and its use in the cable industry |
| US6894218B2 (en) | 2000-04-03 | 2005-05-17 | Lantor B.V. | Cable tape and method for manufacturing a cable tape |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3631250C2 (en) * | 1986-09-13 | 1994-03-24 | Kabelmetal Electro Gmbh | Flame retardant indoor cable |
| FR2644004B1 (en) * | 1989-03-06 | 1994-05-06 | Total France | COMPOSITIONS FOR FILLING ELECTRIC AND / OR OPTICAL CABLES |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1564336A (en) * | 1967-05-23 | 1969-04-18 | ||
| DE2021726A1 (en) * | 1970-05-04 | 1971-12-02 | Kabel Metallwerke Ghh | Insulated telephone cable - with core - jacket interstices - filled with polystyrene foam in wax/vaseline mass |
-
1984
- 1984-02-06 DE DE19843404487 patent/DE3404487A1/en not_active Withdrawn
- 1984-12-18 EP EP84730144A patent/EP0155430A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1564336A (en) * | 1967-05-23 | 1969-04-18 | ||
| DE2021726A1 (en) * | 1970-05-04 | 1971-12-02 | Kabel Metallwerke Ghh | Insulated telephone cable - with core - jacket interstices - filled with polystyrene foam in wax/vaseline mass |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0271171A1 (en) * | 1986-12-11 | 1988-06-15 | Lantor B.V. | Expandable tape for cables, the use thereof, and cables |
| EP0279718A1 (en) * | 1987-01-20 | 1988-08-24 | NORDLYS, Société Anonyme dite: | Water-tight material and its use in the cable industry |
| US6894218B2 (en) | 2000-04-03 | 2005-05-17 | Lantor B.V. | Cable tape and method for manufacturing a cable tape |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3404487A1 (en) | 1985-08-08 |
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