EP0674324B1 - Kabelschutzrohr - Google Patents
Kabelschutzrohr Download PDFInfo
- 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
Links
- -1 polyethylene Polymers 0.000 claims abstract description 8
- 229920000573 polyethylene Polymers 0.000 claims abstract description 8
- 229920001903 high density polyethylene Polymers 0.000 claims description 19
- 229920003023 plastic Polymers 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 abstract description 20
- 238000002474 experimental method Methods 0.000 abstract description 2
- 239000004700 high-density polyethylene Substances 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009757 thermoplastic moulding Methods 0.000 description 1
Images
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)
- Cable Accessories (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
- Typ A:
- herkömmliche Weich-PE-Rohre
- Typ B:
- Weich-PE-Rohre mit gleitfreudiger Innenbeschichtung aus PEHD (ca. 0,3 mm)
- Kabel:
- Radox-Ceander-Netzkabel GKT/ XKT 3x50/50 mm2 Adern vernetzt
- Verlegte Gesamtlänge:
- je 500 m ca. 280 m gerade, 220 m mit leichter Krümmung
| Kabellänge | Typ A | Typ B | Vergleich | |
| Typ A | Typ B | |||
| m | kg | kg | kg | % |
| 50 | 91 | 91 | 0 | 0 |
| 100 | 156 | 91 | - 65 | 58 |
| 150 | 208 | 117 | - 91 | 56 |
| 200 | 273 | 156 | - 117 | 57 |
| 250 | 325 | 182 | - 143 | 56 |
| 300 | 390 | 221 | - 169 | 57 |
| 350 | 455 | 273 | - 182 | 60 |
| 400 | 507 | 299 | - 208 | 59 |
| 450 | 585 | 351 | - 234 | 60 |
| 500 | 676 | 377 | - 299 | 56 |
Claims (7)
- Kunststoffrohr aus Weich-Polyethylen, dadurch gekennzeichnet, dass es innen mindestens teilweise mit Polyethylen hoher Dichte beschichtet ist.
- Kunststoffrohr gemäss Anspruch 1, dadurch gekennzeichnet, dass es mit Polyethylen hoher Dichte beschichtete Führungen aufweist.
- Kunststoffrohr gemäss Anspruch 1 oder 2, dadurch gekennzeichnet, dass es innen vollständig mit Polyethylen hoher Dichte beschichtet ist.
- Kunststoffrohr gemäss einem der Ansprüche 1 - 3, dadurch gekennzeichnet, dass die Polyethylenschicht hoher Dichte eine Dicke von mindestens 0,1 mm aufweist, insbesonders ca. 0,3 mm.
- Kunststoffrohr gemäss einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass mindestens das Weich-Polyethylen und vorzugsweise auch das Polyethylen hoher Dichte ein Recycling-Produkt ist.
- Verfahren zur Herstlelung eines Kunststoffrohres gemäss einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass dieses mittels Co-Extrusion hergestellt wird.
- Verwendung des Kunststoffrohres nach einem der Ansprüche 1 bis 5 als Kabelschutzrohr.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH779/94 | 1994-03-15 | ||
| CH77994 | 1994-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0674324A1 EP0674324A1 (de) | 1995-09-27 |
| EP0674324B1 true EP0674324B1 (de) | 1998-12-16 |
Family
ID=4194993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95102935A Expired - Lifetime EP0674324B1 (de) | 1994-03-15 | 1995-03-02 | Kabelschutzrohr |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0674324B1 (de) |
| AT (1) | ATE174718T1 (de) |
| DE (1) | DE59504527D1 (de) |
Families Citing this family (2)
| 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 |
| CN119373950A (zh) * | 2023-07-26 | 2025-01-28 | 中国石油化工股份有限公司 | 一种耐氯聚乙烯管材及其制备方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3580987A (en) * | 1968-03-26 | 1971-05-25 | Pirelli | Electric cable |
| FR2326714A1 (fr) * | 1975-09-19 | 1977-04-29 | Cables De Lyon Geoffroy Delore | Protection et renforcement mecanique des fibres optiques |
| FR2325062A1 (fr) * | 1975-09-19 | 1977-04-15 | Cables De Lyon Geoffroy Delore | Noyau central pour l'assemblage de fibres optiques en un faisceau |
| 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 |
-
1995
- 1995-03-02 DE DE59504527T patent/DE59504527D1/de not_active Expired - Fee Related
- 1995-03-02 AT AT95102935T patent/ATE174718T1/de not_active IP Right Cessation
- 1995-03-02 EP EP95102935A patent/EP0674324B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE174718T1 (de) | 1999-01-15 |
| EP0674324A1 (de) | 1995-09-27 |
| DE59504527D1 (de) | 1999-01-28 |
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