EP0674324B1 - Gaine de protection de câble - Google Patents

Gaine de protection de câble Download PDF

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Publication number
EP0674324B1
EP0674324B1 EP95102935A EP95102935A EP0674324B1 EP 0674324 B1 EP0674324 B1 EP 0674324B1 EP 95102935 A EP95102935 A EP 95102935A EP 95102935 A EP95102935 A EP 95102935A EP 0674324 B1 EP0674324 B1 EP 0674324B1
Authority
EP
European Patent Office
Prior art keywords
tube
soft
plastic tube
pehd
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
Application number
EP95102935A
Other languages
German (de)
English (en)
Other versions
EP0674324A1 (fr
Inventor
Walter E. Strutz
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.)
Jansen AG
Original Assignee
Jansen AG
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 Jansen AG filed Critical Jansen AG
Publication of EP0674324A1 publication Critical patent/EP0674324A1/fr
Application granted granted Critical
Publication of EP0674324B1 publication Critical patent/EP0674324B1/fr
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
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes

Definitions

  • the present invention relates to plastic pipes, in particular cable protection tubes made of soft polyethylene (Soft PE), when pulling the cable have reduced friction.
  • Soft PE soft polyethylene
  • Soft PE is understood to be a mixture of low density polyethylene (PELD) and high density polyethylene (PEHD), the PEHD content being less than the PELD content or even zero.
  • PEHD is generally understood to mean PE qualities with a density of equal to or greater than approximately 0.930 g / cm 3 (23 ° C.), based on the colorless and unfilled base material.
  • these pipes have the disadvantage that the friction when pulling in the cables is relatively high. It has already been tried to reduce the friction. the required pull-in forces through mechanical measures resp. reduce the introduction of lubricants.
  • EP-A-0 359 128 describes one piece a thermoplastic molding compound extruded plastic tube, especially a cable protection tube, in which the Lubricant is worked directly into the molding compound.
  • a silicone oil is used as a lubricant in amounts of up to approx. 5% incorporated. This incorporation of silicone oils is especially suitable for hard polyethylene (PEHD).
  • This incorporation does cause environmental problems by directly exiting part of the lubricant at the end of the pipe after pulling in the cable and one achieved homogeneous distribution of the same, but contains the entire molding compound contains a foreign substance that affects the material properties influenced and also interfere with recycling can.
  • cable protection tubes are made of pure PEHD have better sliding properties than those made of soft PE. However, they are more expensive and stiffer and are therefore only used for special applications.
  • the aim of the present invention was now to to provide easy-sliding plastic pipes made of soft PE, especially for use as cable protection tubes, and a process for their production.
  • the plastic pipes according to the present invention are at least coated with PEHD in the area of any guides, but preferably continuously.
  • a tube with a continuous inner coating is shown in the figures.
  • Figure 1 shows a cross section through an inventive Cable protection tube with an inner layer 1 made of PEHD and an outer layer 2 made of soft PE.
  • Figure 2 shows a longitudinal section through a Pipe wall.
  • the PEHD coating 1 must have such a minimum thickness have that the gliding ability guarantees is. Adequate gliding will already be achieved with PEHD layer thicknesses of approx. 0.1 mm, one regular application of such low layer thicknesses high apparatus and process engineering requirements. It is therefore usually more economical to use thicker layers to choose.
  • the maximum thickness is not critical. However, it is used for cost reasons and to maintain the Pipe flexibility kept as low as possible.
  • Pipes are made from recycled polyethylene can be. As a result of exclusive use The pipes can also be made of polyethylene can be easily recycled again.
  • Such pipes consisting of an inner layer 1 and an outer layer resp. an outer tube 2, are preferably in the co-extrusion process produced in a conventional extruder.
  • the outer tube 2 is moved in the main extruder.
  • the inner layer 1 is over a side extruder transported through the pipe tool and through distribution channels applied as an inner layer.
  • Example Comparison of a conventional soft PE pipe with a pipe coated according to the invention.
  • the cables were directly from the reel a tractor with direct logging of the draw-in length and retracted.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Cable Accessories (AREA)

Claims (7)

  1. Tuyau plastique en polyéthylène souple, caractérisé en ce qu'il est revêtu à l'intérieur, au moins partiellement, de polyéthylène à haute densité.
  2. Tuyau plastique suivant la revendication 1, caractérisé en ce qu'il dispose de guides revêtus de polyéthylène à haute densité.
  3. Tuyau plastique suivant la revendication 1 ou 2, caractérisé en ce qu'il est entièrement revêtu à l'intérieur de polyéthylène à haute densité.
  4. Tuyau plastique suivant l'une des revendications 1 à 3, caractérisé en ce que la couche de polyéthylène à haute densité dispose d'une épaisseur d'au moins de 0,1 mm, notamment d'environ 0,3 mm.
  5. Tuyau plastique suivant l'une des revendications 1 à 4, caractérisé en ce qu'au moins le polyéthylène souple et, de préférence, également le polyéthylène à haute densité représentent un produit recyclé.
  6. Procédé pour la fabrication d'un tuyau plastique suivant l'une des revendications 1 à 4, caractérisé en ce qu'il est fabriqué par co-extrusion.
  7. Utilisation du tuyau plastique suivant l'une des revendications 1 à 5 comme gaine de protection de câble.
EP95102935A 1994-03-15 1995-03-02 Gaine de protection de câble Expired - Lifetime EP0674324B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH77994 1994-03-15
CH779/94 1994-03-15

Publications (2)

Publication Number Publication Date
EP0674324A1 EP0674324A1 (fr) 1995-09-27
EP0674324B1 true EP0674324B1 (fr) 1998-12-16

Family

ID=4194993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102935A Expired - Lifetime EP0674324B1 (fr) 1994-03-15 1995-03-02 Gaine de protection de câble

Country Status (3)

Country Link
EP (1) EP0674324B1 (fr)
AT (1) ATE174718T1 (fr)
DE (1) DE59504527D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5658613A (en) * 1995-01-27 1997-08-19 Technology Licensing Company Hot melt fluidized cladding of innerduct liner

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580987A (en) * 1968-03-26 1971-05-25 Pirelli Electric cable
FR2325062A1 (fr) * 1975-09-19 1977-04-15 Cables De Lyon Geoffroy Delore Noyau central pour l'assemblage de fibres optiques en un faisceau
FR2326714A1 (fr) * 1975-09-19 1977-04-29 Cables De Lyon Geoffroy Delore Protection et renforcement mecanique des fibres optiques
US4848566A (en) * 1987-10-23 1989-07-18 W. R. Grace & Co. Antistatic/conductive container
GB2223877B (en) * 1988-10-17 1993-05-19 Pirelli General Plc Extra-high-voltage power cable

Also Published As

Publication number Publication date
ATE174718T1 (de) 1999-01-15
EP0674324A1 (fr) 1995-09-27
DE59504527D1 (de) 1999-01-28

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