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WO2004003302A1 - Cable recouvert d'un manchon xlpe - Google Patents

Cable recouvert d'un manchon xlpe Download PDF

Info

Publication number
WO2004003302A1
WO2004003302A1 PCT/IB2003/002916 IB0302916W WO2004003302A1 WO 2004003302 A1 WO2004003302 A1 WO 2004003302A1 IB 0302916 W IB0302916 W IB 0302916W WO 2004003302 A1 WO2004003302 A1 WO 2004003302A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath
wire
covered
xlpe
xple
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
Application number
PCT/IB2003/002916
Other languages
English (en)
Other versions
WO2004003302A8 (fr
Inventor
Francesco Ferraiolo
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.)
Officine Maccaferri SpA
Original Assignee
Officine Maccaferri SpA
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 Officine Maccaferri SpA filed Critical Officine Maccaferri SpA
Priority to AU2003244956A priority Critical patent/AU2003244956A1/en
Publication of WO2004003302A1 publication Critical patent/WO2004003302A1/fr
Publication of WO2004003302A8 publication Critical patent/WO2004003302A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0039—Amorphous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0068—Permeability to liquids; Adsorption
    • B29K2995/0069—Permeability to liquids; Adsorption non-permeable

Definitions

  • the present invention relates to a wire covered with a sheath of protective material for use, in particular but in non-limiting manner, in the construction field and in products made of double-twist wire netting which are used in the water, geotechnical, and erosion-control fields.
  • the present invention also relates to articles made of this wire.
  • PVC owes its wide use to its compatibility with a large number of additives which modify its characteristics; amongst these additives are the plasticizers already mentioned, reinforcing fillers, lubricants for facilitating moulding, and pigments and colourings of various types. All of these additional substances render the use of PVC highly environmentally disadvantageous, given the ease with which it releases pollutants, particularly in water, and toxic gases in the event of combustion.
  • the plasticizing components which are added to the polymer evaporate over time, progressively depriving the sheath of its mechanical characteristics, rendering it more fragile and subject to breakage.
  • the protection of the wire by the sheath is often also unsatisfactory because of the poor adhesion of the PVC to the wire; this creates spaces at the interface of the two portions into which the oxidizing agents penetrating from the breakage points can easily infiltrate. The corrosion effect is thus not restricted to the portion of wire that remains exposed but is also propagated to the portion in which the sheath is still intact .
  • the object of the present invention is to overcome the disadvantages of the prior art and to provide a wire covered with a sheath of polymer material which has good and enduring mechanical strength irrespective of the external temperature, which adheres strongly to the metal core of the wire, and which is self-extinguishing.
  • the object of the present invention is also to provide a covered wire which is easy to use, inexpensive to produce, has maximum ability to withstand production processes, and is protected against corrosion.
  • the subject of the invention is a wire of the type indicated in the introduction to this description, characterized in that the sheath comprises cross-linked XLPE.
  • the particular plastics material which is used to solve the problems of the prior art is a cross-linked polyethylene known as XLPE which, particularly in its low-density form, is used for covering electrical cables .
  • the polyethylene is generally filled with carbon black and supplemented with peroxides which have the purpose of permitting extrusion and preventing cross- linking, which takes place subsequently by a vulcanization process. Its principal characteristics are the ability to retain its mechanical properties over time and irrespective of the external temperature.
  • XLPE instead of PVC
  • PVC polyvinyl ethylene
  • XLPE is flexible and tough, permitting the production of coverings which stand up well to production processes such as the manufacture of double- twist wire nettings .
  • the polyethylene cannot be attacked by any reagent and is insoluble in any solvent, permitting optimal isolation of the wire.
  • the mechanical characteristics of XLPE remain stable with variations in temperature, which is particularly advantageous for its processing at different ambient temperatures depending on the season or the country.
  • the good adhesion between this polyethylene and metal renders the formation of spaces at the interface of the two materials unlikely, creating a condition of impermeability to oxidizing agents, the effect of which is limited purely to the exposed portion of the wire.
  • an additive is added to the outer layer of the sheath to render it self-extinguishing in the standard environmental conditions.
  • This additive generally reduces the mechanical characteristics of the XLPE and renders it more expensive but, by virtue of a coextrusion process, it is possible to introduce it purely into an outer layer, whilst retaining good characteristics of the sheath as a whole and limiting the costs of the product.
  • a covered wire 10 comprises a wire 12 , made of one of the materials that are known for the production of wires for fencing or construction.
  • the wire is of the type used for the production of double-twist nettings.
  • a protective sheath 16 is applied to the outer surface 14 of the wire 12 and adheres to the outer surface 14 without leaving spaces.
  • the protective sheath 16 is made of a plastics material comprising a type of polyethylene commonly known as XLPE, preferably but in non-limiting manner, of a variety suitable for extrusion, such as the low-density type.
  • the protective sheath 16 also comprises one or more additives of known type amongst which, for example but in non-limiting manner, are carbon black, peroxides which assist the extrusion process, and other substances for promoting cross-linking of the material.
  • the layer 18 of plastics material immediately beneath the outer surface 20 of the protective sheath 16 comprises an additive which renders the XLPE self-extinguishing in standard environmental conditions . The introduction of this additive is possible by virtue of the coextrusion process by which the protective sheath 16 is applied to the wire 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ropes Or Cables (AREA)

Abstract

L'invention concerne un câble recouvert d'un manchon de matière protectrice à utiliser en particulier dans le domaine de la construction et dans des produits de filet en câble à torsade double, utilisés dans les domaines associés à l'eau, à la géotechnique et au contrôle de l'érosion, lequel câble comprenant un manchon en polyéthylène réticulé (XLPE).
PCT/IB2003/002916 2002-07-01 2003-06-27 Cable recouvert d'un manchon xlpe Ceased WO2004003302A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003244956A AU2003244956A1 (en) 2002-07-01 2003-06-27 Cable covered with a xple sheath

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2002A000420 2002-07-01
IT2002BO000420A ITBO20020420A1 (it) 2002-07-01 2002-07-01 Filo metallico rivestito con guaina

Publications (2)

Publication Number Publication Date
WO2004003302A1 true WO2004003302A1 (fr) 2004-01-08
WO2004003302A8 WO2004003302A8 (fr) 2004-03-18

Family

ID=11440265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/002916 Ceased WO2004003302A1 (fr) 2002-07-01 2003-06-27 Cable recouvert d'un manchon xlpe

Country Status (3)

Country Link
AU (1) AU2003244956A1 (fr)
IT (1) ITBO20020420A1 (fr)
WO (1) WO2004003302A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011073730A1 (fr) * 2009-12-17 2011-06-23 Officine Maccaferri S.P.A. Dispositif et machine et fabrication de filet à mailles ouvertes en plastique
EP3992327A1 (fr) 2020-10-28 2022-05-04 NV Bekaert SA Filet de fil d'acier à double revêtement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857250A (en) * 1984-04-13 1989-08-15 Union Carbide Corporation One-extrusion method of making a shaped crosslinkable extruded polymeric product
US5368410A (en) * 1993-02-02 1994-11-29 Officine Maccaferri Spa Process for making a mattress-type gabion for soil stabilization
WO2000011248A1 (fr) * 1998-08-25 2000-03-02 Gentry Bobby C Procede et appareil de fabrication de cables torsades et cables ainsi fabriques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857250A (en) * 1984-04-13 1989-08-15 Union Carbide Corporation One-extrusion method of making a shaped crosslinkable extruded polymeric product
US5368410A (en) * 1993-02-02 1994-11-29 Officine Maccaferri Spa Process for making a mattress-type gabion for soil stabilization
WO2000011248A1 (fr) * 1998-08-25 2000-03-02 Gentry Bobby C Procede et appareil de fabrication de cables torsades et cables ainsi fabriques

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011073730A1 (fr) * 2009-12-17 2011-06-23 Officine Maccaferri S.P.A. Dispositif et machine et fabrication de filet à mailles ouvertes en plastique
KR20120119912A (ko) * 2009-12-17 2012-10-31 오피신 마카페리 에스. 피. 에이. 플라스틱 오픈 메쉬 네트 제조 장치 및 머신
KR101642794B1 (ko) 2009-12-17 2016-07-26 오피신 마카페리 에스. 피. 에이. 플라스틱 오픈 메쉬 네트 제조 장치 및 머신
EP3992327A1 (fr) 2020-10-28 2022-05-04 NV Bekaert SA Filet de fil d'acier à double revêtement
WO2022089919A1 (fr) 2020-10-28 2022-05-05 Nv Bekaert Sa Treillis de fil d'acier à double revêtement

Also Published As

Publication number Publication date
ITBO20020420A0 (it) 2002-07-01
AU2003244956A1 (en) 2004-01-19
WO2004003302A8 (fr) 2004-03-18
ITBO20020420A1 (it) 2004-01-02

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