EP1722378A2 - Förderkabel für elektrische Versorgung und Signalübertragung - Google Patents

Förderkabel für elektrische Versorgung und Signalübertragung Download PDF

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Publication number
EP1722378A2
EP1722378A2 EP06300469A EP06300469A EP1722378A2 EP 1722378 A2 EP1722378 A2 EP 1722378A2 EP 06300469 A EP06300469 A EP 06300469A EP 06300469 A EP06300469 A EP 06300469A EP 1722378 A2 EP1722378 A2 EP 1722378A2
Authority
EP
European Patent Office
Prior art keywords
crosslinking agent
derivatives
thermoplastic polyurethane
crosslinking
handling cable
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.)
Withdrawn
Application number
EP06300469A
Other languages
English (en)
French (fr)
Inventor
Olivier Pinto
Jean-Michel Marty
Chantal Barioz
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 EP1722378A2 publication Critical patent/EP1722378A2/de
Withdrawn legal-status Critical Current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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H01B7/041—Flexible cables, conductors, or cords, e.g. trailing cables attached to mobile objects, e.g. portable tools, elevators, mining equipment, hoisting cables
    • 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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]

Definitions

  • the present invention relates to a handling cable, that is to say a power supply cable and / or signal transmission, which is intended in particular to be coupled to a mobile machine in motion.
  • the invention finds an advantageous application in the field of cables for winders, which as their name suggests, are doomed to be wound and unwound during the movement of the machines to which they are respectively connected.
  • This category concerns the handling cables, in other words flexible cables which have a flexibility to give them a certain capacity of displacement during use, and which are generally multi-conductors so as to be able to perform functions of power supply and / or signal transmission, that said signal is also of electrical or optical origin.
  • a handling cable is conventionally made up of several insulated conductors, which are grouped together in the same protective sheath.
  • the material component of the sheath in question must have thermomechanical properties that are compatible with the final conditions of use of the cable.
  • the sheath material is flexible enough to keep the cable flexibility necessary to be able to effectively accompany any movement of the mobile machine with which it is associated. It is particularly important to ensure the winding and unwinding of the handling cable, when the latter is more specifically used in combination with one or more winders.
  • sheath material provides excellent resistance to abrasion and tearing, since the handling cable will have to withstand incessant movements during the implementation of the associated mobile machine, with all the frictional stresses that implies. This will be precisely the case since the cable will be constantly brought to wind and unwind around guide wheels and other return pulleys.
  • the sheath material must finally have very good mechanical properties, in order to withstand the high tensile forces that the handling cable will inevitably have to undergo during the movements of the mobile machine to which it is connected. It should be noted that this feature is particularly relevant in the case of cables for reels.
  • thermosetting material indeed offers excellent hot deformation properties under normal conditions of use, as well as very good flexibility.
  • thermoplastic is actually known to be exceptionally resistant to abrasion, and it also offers excellent mechanical properties both in terms of tensile strength and flexibility.
  • the technical problem to be solved by the object of the present invention is to provide a handling cable intended in particular for the power supply and / or signal transmission with a mobile machine moving, handling cable that would allow to avoid the problems of the state of the art by offering a resistance to the temperature significantly improved under mechanical stresses, while remaining inexpensive to manufacture.
  • the handling cable comprises at least one sheath made by self-crosslinking of a composition comprising a thermoplastic polyurethane and a crosslinking agent having at least two isocyanate functional groups.
  • sheath means here in the broad sense of the term, that is to say that it can denote indifferently a first coating of a conductive element, an upper layer of an insulated cable, or an envelope joining several insulated cables.
  • self crosslinking conventionally means that the crosslinking of the sheath material takes place at ambient temperature and possibly by the humidity of the air, without subsequent treatment.
  • the invention as thus defined has the advantage of having a sheath material that combines the excellent properties of abrasion resistance, flexibility and mechanical tensile strength of thermoplastics. , with the exceptional dimensional stability under hot and under mechanical stress of the crosslinked materials.
  • Self-crosslinking makes it possible more specifically to dispense with the expensive vulcanization processes of the state of the art, which in the end advantageously contributes to the low cost price of the handling cable which is the subject of the invention.
  • the crosslinking agent is chosen from the group of diphenyl methane diisocyanate (MDI) and its derivatives, isophorone diisocyanate (IPDI) and its derivatives, toluene diisocyanate (TDI) and its derivatives, hexamethylene diisocyanate (HDI) and its derivatives, or any mixture of these compounds.
  • MDI diphenyl methane diisocyanate
  • IPDI isophorone diisocyanate
  • TDI toluene diisocyanate
  • HDI hexamethylene diisocyanate
  • the composition of the sheath material comprises between 2 and 20 parts by weight of crosslinking agent per 100 parts by weight of thermoplastic polyurethane, and preferably between 4 and 10 parts by weight of crosslinking agent.
  • thermoplastic polyurethane which are perfectly usable for the manufacture of cable ducts handling. Samples are thus prepared from six different compositions, in order to compare their respective performances.
  • thermoplastic polyurethane is common to all six samples. he is in this case a polymer distributed under the trademark Estane 58888Nat021 by the company Noveon.
  • sample 1 is an extreme case, since it consists solely of thermoplastic polyurethane. In other words, its content of crosslinking agent is zero. For these reasons, it must be considered as a reference.
  • samples 2 to 4 are distinguished from their counterparts by the fact that the crosslinking agent they are provided with is diphenyl methane diisocyanate, more commonly referred to by the abbreviation MDI.
  • Samples 5 and 6 are remarkable in that the crosslinking agent that enters their compositions is the trimer of isophorone diisocyanate, which is commonly identified by the abbreviation t-IPDI.
  • sample 1 consists exclusively of thermoplastic polyurethane, which is moreover uncrosslinked, the material is simply extruded and shaped to the desired shape.
  • Samples 2 to 6 correspond to crosslinked materials, they are all prepared by following the same procedure which consists schematically to perform a grafting, and then an extrusion.
  • the process therefore starts with a first grafting step.
  • the standard thermoplastic polyurethane and the selected isocyanate crosslinking agent are first introduced into a twin-screw extruder through a feed hopper.
  • the mixture is then mixed at a temperature in the region of 200 ° C.
  • the granules of grafted thermoplastic polyurethane thus obtained are then dried and then stored for more than 6 months in containers that are impervious to moisture in the air.
  • thermoplastic polyurethane is treated in a conventional single-screw extruder, in a manner similar to standard thermoplastic polyurethane.
  • Car Crosslinking typically occurs within 4 to 7 days at room temperature and humidity.
  • thermoplastic polyurethanes in this case those of samples 2, 4 and 5.
  • a series of measurements is then carried out to determine, at regular time intervals, the insoluble levels of the material being crosslinked.
  • the procedure is identical for each measurement. Specifically, 1 g of the studied material (M1) is placed in an Erlenmeyer flask containing 100 g of tetrahydrofuran (THF), and the whole is heated to reflux (67 ° C) with magnetic stirring for a period of 24 hours. The contents of the Erlenmeyer flask are then hot-filtered on a metal grid whose mesh size is 120 ⁇ m ⁇ 120 ⁇ m. The solid residue obtained is then dried in an oven at 80 ° C. for 24 hours and then weighed (M2). The level of insolubles expressed in% is then calculated by making the mass ratio M2x100 / M1.
  • THF tetrahydrofuran
  • sample 1 gives an insoluble level of 0%, which is entirely logical since this reference sample corresponds to the composition of ungrafted polymer, and therefore to an uncrosslinked material.
  • Figure 1 illustrates the evolution of the levels of insolubles during the crosslinking of the thermoplastic polyurethanes of samples 2, 4 and 5. It highlights in particular the influence of the nature and the concentration of the crosslinking agent within the compositions of the tested materials.
  • Tests are conducted at room temperature in order to determine the main mechanical properties of samples 1, 3 and 4, namely the breaking stress and elongation at break.
  • the objective is to compare the properties of two cross-linked thermoplastic polyurethanes (samples 3 and 4) with those of a simple polyurethane uncrosslinked thermoplastic (sample 1), but also to evaluate the impact of the concentration of crosslinking agent on said properties.
  • the standard NF EN 60811-2-1 concerns the measurement of the hot creep of a material under mechanical stress.
  • the corresponding test is commonly referred to as the Anglicism Hot Set Test.
  • Table 3 groups the results of the tests carried out on samples 1, 3 and 4, taking into account only the permanent elongation. ⁇ u> Table 3 ⁇ / u> Sample Temperature of Hot Set Maximum Test (° C) 1 160 3 175 4 180
  • sample 1 which is recalled is a non-crosslinked thermoplastic polyurethane, can withstand a temperature of Hot Set Test maximum of 160 ° C.
  • thermomechanical properties when the material is crosslinked (samples 3 and 4).
  • the temperature of Hot Set Maximum Test passes indeed to 175, and even to 180 ° C, since the composition of the base material comprises respectively 6 pcr (sample 3) and 8 pcr (sample 4) of crosslinking agent of MDI type.
  • This hot creep test is based on the Hot Set Test principle, but the samples are subjected to an accelerated aging of 15 hours at a temperature of 120 ° C.
  • thermomechanical properties of samples 4 and 6 that is to say of crosslinked thermoplastic polyurethanes due to the presence of two different crosslinking agents, respectively MDI and t-IPDI.
  • Table 4 summarizes the various results of the accelerated aging test. ⁇ u> Table 4 ⁇ / u> Sample 4 6 Hot set test Lengthening under stress (%) 20 10 175 ° C Permanent elongation (%) 20 0 Hot set test Lengthening under stress (%) Failure 400 200 ° C Permanent elongation (%) Failure 115
  • thermoplastic polyurethane modified with 6 pcr or more reticulant t-IPDI requires more than 3 weeks at room temperature and humidity to pass the Hot Set Test at 175 ° C. This is entirely consistent with the evolution of the insoluble rate discussed previously.
  • the creeping test is conducted on samples 1 to 4 in order to determine the impact of the crosslinking agent concentration on the dimensional stability of the crosslinked thermoplastic polyurethane
  • Figures 2 and 3 show how increasing this concentration improves the dimensional stability of the crosslinked thermoplastic polyurethane. It should be noted that this characteristic applies both to the stress elongation shown in FIG. 2 and to the permanent elongation that is the object of FIG.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Electromagnetism (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulated Conductors (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
EP06300469A 2005-05-12 2006-05-12 Förderkabel für elektrische Versorgung und Signalübertragung Withdrawn EP1722378A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0551243A FR2885729B1 (fr) 2005-05-12 2005-05-12 Cable de manutention pour l'alimentation electrique et/ou la transmission de signal

Publications (1)

Publication Number Publication Date
EP1722378A2 true EP1722378A2 (de) 2006-11-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06300469A Withdrawn EP1722378A2 (de) 2005-05-12 2006-05-12 Förderkabel für elektrische Versorgung und Signalübertragung

Country Status (6)

Country Link
US (1) US20060275605A1 (de)
EP (1) EP1722378A2 (de)
JP (1) JP2006324243A (de)
KR (1) KR20060117266A (de)
CN (1) CN1901100A (de)
FR (1) FR2885729B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105038195A (zh) * 2015-07-23 2015-11-11 安徽瑞侃电缆科技有限公司 一种耐低温耐磨抗裂电缆

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2919873B1 (fr) * 2007-08-07 2009-11-20 Setup Performance Matiere thermoplastique postreticulable apres transformation et articles moules stables a tres haute temperature obtenus apres transformation
CN104155696B (zh) * 2014-08-15 2016-10-05 中国地质大学（北京） 一种分布式时间域激电接收装置及实现方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023126A (en) * 1959-01-12 1962-02-27 Union Carbide Corp Method of bonding a synthetic resin coating to a polyolefin surface and article produced thereby
US3098229A (en) * 1959-06-17 1963-07-16 Gen Mills Inc Transmission line erected by pressurized plastic
BE613493A (de) * 1961-02-06 1900-01-01
BE615937A (de) * 1961-04-03 1900-01-01
US6139496A (en) * 1999-04-30 2000-10-31 Agilent Technologies, Inc. Ultrasonic imaging system having isonification and display functions integrated in an easy-to-manipulate probe assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105038195A (zh) * 2015-07-23 2015-11-11 安徽瑞侃电缆科技有限公司 一种耐低温耐磨抗裂电缆

Also Published As

Publication number Publication date
FR2885729B1 (fr) 2007-06-22
CN1901100A (zh) 2007-01-24
FR2885729A1 (fr) 2006-11-17
KR20060117266A (ko) 2006-11-16
JP2006324243A (ja) 2006-11-30
US20060275605A1 (en) 2006-12-07

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