EP0790349B1 - Câble d'acier avec allongement à la rupture élevé - Google Patents

Câble d'acier avec allongement à la rupture élevé Download PDF

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Publication number
EP0790349B1
EP0790349B1 EP19970200163 EP97200163A EP0790349B1 EP 0790349 B1 EP0790349 B1 EP 0790349B1 EP 19970200163 EP19970200163 EP 19970200163 EP 97200163 A EP97200163 A EP 97200163A EP 0790349 B1 EP0790349 B1 EP 0790349B1
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EP
European Patent Office
Prior art keywords
cord
steel
elongation
steel cord
filaments
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
EP19970200163
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German (de)
English (en)
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EP0790349A1 (fr
Inventor
Urbain D'haene
Marc Eggermont
Dirk Meersschaut
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Bekaert NV SA
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Bekaert NV SA
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Priority to EP19970200163 priority Critical patent/EP0790349B1/fr
Publication of EP0790349A1 publication Critical patent/EP0790349A1/fr
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/12—Making ropes or cables from special materials or of particular form of low twist or low tension by processes comprising setting or straightening treatments
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/104—Rope or cable structures twisted
    • D07B2201/1072—Compact winding, i.e. S/S or Z/Z
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2007—Wires or filaments characterised by their longitudinal shape
    • D07B2201/2008—Wires or filaments characterised by their longitudinal shape wavy or undulated
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2009—Wires or filaments characterised by the materials used
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/201—Wires or filaments characterised by a coating
    • D07B2201/2011—Wires or filaments characterised by a coating comprising metals
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2022—Strands coreless
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2023—Strands with core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2029—Open winding
    • D07B2201/2031—Different twist pitch
    • D07B2201/2032—Different twist pitch compared with the core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2046—Strands comprising fillers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/206—Cores characterised by their structure comprising wires arranged parallel to the axis
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2061—Cores characterised by their structure comprising wires resulting in a twisted structure
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2075—Fillers
    • D07B2201/2079—Fillers characterised by the kind or amount of filling
    • D07B2201/2081—Fillers characterised by the kind or amount of filling having maximum filling
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3025—Steel
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3085—Alloys, i.e. non ferrous
    • D07B2205/3089—Brass, i.e. copper (Cu) and zinc (Zn) alloys
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/20—Type of machine
    • D07B2207/204—Double twist winding
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/40—Machine components
    • D07B2207/404—Heat treating devices; Corresponding methods
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/2005—Elongation or elasticity
    • D07B2401/201—Elongation or elasticity regarding structural elongation
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/208—Enabling filler penetration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2046—Tire cords

Definitions

  • the present invention relates to a steel cord adapted for the reinforcement of an elastomer such as a rubber tyre.
  • Steel cords are widely known to reinforce elastomers.
  • the reinforced elastomers form a so-called composite material.
  • the steel cords provide for the required strength while the elastomer provides for the required elasticity.
  • the steel cords must be able to follow as much as possible movements of the elastomer, e.g. in the outer layer of the belt of a radial tyre, the so-called protection layer.
  • a high elongation of the steel cord is strongly desired. This high elongation, i.e. an elongation at break between 5 and 10 %, is achieved in the so-called high-elongation cords.
  • the high-elongation cords are commonly multi-strand steel cords (i.e.
  • the high-elongation cords do not enable a complete penetration by the elastomer, since any available spaces between the filaments have disappeared as a consequence of the high degree of twisting.
  • a substantial part of the elongation gets lost during the embedding of the steel cord in the elastomer.
  • the elongation at fracture of a high-elongation cord falls down from about 7.5 % to about 2.5 to 4 % after the vulcanisation in rubber.
  • a steel cord adapted for the reinforcement of an elastomer.
  • the steel cord is composed of twisted steel filaments of a pearlitic structure.
  • the non-embedded steel cord has an elastic and plastic elongation at break which is of about the same level as the value of the elastic and plastic elongation of the steel cord once vulcanized in the elastomer.
  • the sum of the elastic and plastic elongation at break is x %
  • the sum of elastic and plastic elongation capability in the vulcanized elastomer is y %
  • both values of elongation are 'of about the same level' if y - 0.50 ⁇ x ⁇ y + 0.50.
  • the sum of the elastic and plastic elongation x of the non-embedded steel cord is 3.5 %
  • the sum of the elastic and plastic elongation capability y of the steel cord in the vulcanized elastomer lies between 3.00 % and 4.00 %.
  • the values x and y fulfill following equation : y - 0.35 ⁇ x ⁇ y + 0.35.
  • the structural elongation is a result of the cord structure or of the preforming given to the steel filaments.
  • Structural elongation occurs mainly below a tensile force of 50 Newton, e.g. below a tensile force of 20 Newton.
  • the plastic elongation reaches a high value of about 4 %, which be obtained by a particular mode of stress relieving the steel cord, as will be explained hereafter.
  • This high value of plastic elongation is not a consequence of the constructional features (multiple strands, SS-direction, small twisting steps...) of the cord.
  • the present invention allows to obtain a high-elongation cord with an elongation that is largely independent - at least for the elastic and plastic part - of the typical type of steel cord construction. So it becomes possible to choose a high-elongation steel cord which avoids the disadvantages of the convenient high-elongation steel cords, i.e. which enables full penetration of the elastomer between the composing steel filaments and which does not require a complex and costly way of manufacturing.
  • the total elongation at break i.e. the sum of the elastic, plastic and structural elongation, is at least 5 %.
  • the steel cord as a whole is in a stress-relieved state.
  • This stress-relieving treatment is done after the cord has been twisted to its final form.
  • a first advantage hereof is a high-elongation steel cord which maintains its degree of elongation in the elastomer.
  • a second advantage is a steel cord with a high degree of structural stability, i.e. no significant residual torsions, a high degree of straigthness and almost no flare. Such a cord will have no substantial processability problems during the embedding of the cord in the elastomer and can be used without problems in highly automated tyre manufacturing processes. This high degree of structural stability of the cord is obtained without particular and supplemental mechanical post-treatments of the cord.
  • the present invention is clearly distinguished from the stress-relieving of individual steel filaments.
  • Each steel filament that has been stress-relieved individually also has a high plastic elongation. Twisting such stress-relieved steel filaments into a final cord means that every single filament is plastically bent and, dependent upon the particular way of twisting, that every single filament is twisted around its own axis. This leads unavoidably to a significant loss of the plastic elongation of the cord and to the creation of internal tensions in the steel filaments.
  • the invention steel cord construction is preferably an open structure.
  • the terms "open structure" refer to a steel cord construction which enables full penetration of the elastomer into the steel cord. This means that elastomer may surround every individual steel filament of the steel cord.
  • the openness may be obtained in two major ways. A first way for obtaining an openness is to create a structure that is tangentially open. A tangentially open structure comprises layers of steel filaments that are unsaturated, which means that spaces exist between the individual steel filaments so that elastomeric material may penetrate therebetween.
  • Unsaturated layers may be formed by appropriate choice of the number of filaments in the layer and/or by the diameter of the filaments in the layer.
  • a second way for obtaining an openness is to create a structure that is radially open. In a radially open structure the composing filaments are more remote from an imaginary axis than they would be in a closed compact form.
  • the radial openness may be obtained by appropriate preforming of the steel filaments. Obviously a radial openness may be combined with a tangential openness.
  • An example is a 3+9-structure, where appropriate preforming of the three core filaments may result in a radial openness of the core and where the nine layer filaments may form an unsaturated layer around the core.
  • the steel cord has a tensile strength of at least 2150 MPa.
  • the yield strength of the cord at a permanent elongation of 0.2 % is preferably at least 88 % (e.g. at least 90 % or at least 92 %) of the tensile strength of the cord. This high yield strength is a direct consequence of the stress-relieving treatment that is applied on the already twisted cord and of the absence of any supplemental mechanical post-treatment.
  • steel cord may consist of two groups of steel filaments : a first group of one or more steel filaments and a second group of two or more steel filaments. If the first group has two steel filaments, these two steel filaments may be twisted or not. The second group of steel filaments is twisted around the first group so as to form an unsaturated layer around the first group, which means that spaces exist in the layer between two or more steel filaments of the second group and that elastomer may penetrate through the layer to the first group.
  • Such a type of steel cord construction may comprise following embodiments in a non-limitative way :
  • a steel cord according to the present invention may also have a substantial structural elongation, e.g. obtained by giving the individual steel filaments an undulation by appropriate pre-forming or post-forming. In this way, a high-elongation 1 x n -cord (n ranging from two to five) with full rubber penetration may be obtained.
  • FIGURE 1 shows the cross-section of a 2+2-invention cord 10.
  • the first group comprises two non-twisted steel filaments 12, and the second group comprises two steel filaments 14 that are twisted around the first group and around each other thereby creating an unsaturated layer around the first group.
  • Such a cord can be manufactured in one single twisting step.
  • FIGURE 2 shows the transversal cross-section of a 2 + 6 - steel cord construction 10.
  • the first group consists of two steel filaments 12 that are twisted around each other.
  • the second group consists of six steel filaments 14 that are twisted around the first group.
  • the layer created by the second group is unsaturated so that rubber may penetrate. Such a steel cord may be manufactured in two steps.
  • FIGURE 3 shows the transversal cross-section of an alternative embodiment of a invention steel cord 10.
  • the steel cord consists of four steel filaments 16 where one or more have been plastically formed into a wave form so that gaps have been created between the steel filaments 16 even if a tensile force is exerted on the steel cord 10.
  • Such an open steel cord may be manufactured in one single step.
  • the type of wave applied to individual steel filaments may vary to a great extent, depending upon the typical wave form, the amplitude and the pitch.
  • the pitch of the wave is substantially smaller than the pitch of the cord in order to create microgaps between the individual steel filaments.
  • the wave form may be planar or spatial.
  • a typical example is a wave form that may be obtained by passing the individual filaments between two toothed wheels, such as disclosed in US-A-5,020,312.
  • Another example is a helicoidal wave form such as disclosed in EP-A-0 462 716.
  • Still another example is a polygonal wave form, such as mentioned in WO-A-95/16816.
  • FIGURE 4 shows two elongation curves 18 and 20.
  • the abscissa is the elongation ⁇ , expressed in per cent, and the ordinate is the tensile strength R m , expressed in MPa or in N/mm 2 .
  • Curve 18 is the elongation curve of a prior art high-elongation cord with a structural elongation. It shows a relatively large elongation for small initial loads (slope much smaller than the modulus E of elasticity of steel) and the total elongation at break is limited once such a cord is embedded in rubber.
  • Curve 20 is the elongation curve of an invention high-elongation cord with a plastical elongation. It shows a relatively small elongation for small initial loads (slope about equal to the modulus of elasticity). The elongation at break is greater than 5 % if not embedded in rubber and it remains that great after vulcanisation in rubber
  • FIGURE 5 The differences between structural, elastic and plastic elongation are illustrated in FIGURE 5 where an elongation curve 22 is shown.
  • a first zone 24 is characterized by a relatively large initial elongation in comparison with small loads (less than 50 Newton). This initial elongation is composed of structural elongation (major part) and of elastic elongation (minor part).
  • a second zone 26 is characterized by a linear relationship and forms the purely elastic part.
  • a third zone 28 starts at the point where the curve leaves the linear relationship and is characterized by a non-linear saturation-like curve. The third zone is only composed of the plastic elongation.
  • the structural elongation only occurs in the first zone, the elastic elongation occurs in both the first and second zone and the plastic elongation occurs in the third zone.
  • Some steel cord constructions do not have a substantial structural elongation.
  • a high-elongation steel cord 2x0.33 + 6x0.33 with twist directions S/S and twist pitches 9mm/18mm, according to the invention may be obtained as follows :
  • a first table summarizes some of the particular properties of a 2x0.33 + 6x0.33 invention steel cord and compares these properties to the corresponding properties of a convenient 3x7x0.22 HE-cord : Properties and features : 2x0.33+6x0.33 3x7x0.22 HE direction of twist SS SS lay length (mm) 9/18 4.5/8 linear density (g/m) 5.30 6.95 optical diameter (mm) 1.185 1.585 part load elongation at initial load of 50 Newton (%) 0.078 2.82 tensile test on cord not embedded in rubber: breaking load (Newton) 1652 1820 tensile strength Rm (MPa) 2448 2280 total elongation at break (%) 5.64 6.00 yield strength at elongation of 0.2 % (% of R m )
  • the total elongation at break does not decrease significantly after embedding the invention cord in rubber. This is a direct consequence of the thermal stress-relieving treatment which has been applied on the final twisted cord. This thermal treatment occurred at a higher temperature than the temperature of rubber vulcanisation, so that the vulcanisation process 'was no longer able' to change the properties of the invention cord significantly.
  • a further advantage of the invention cord is that the fatigue resistance does not decrease significantly in wet circumstances, whereas the convenient high elongation cord sees its fatigue resistance fall to less than 50%. This is a consequence of the rubber penetration which is complete in the invention cord and incomplete in the prior art cord.
  • a second table compares a 1+5 invention cord to a 1+5 cord where the particular stress-relieving treatment has not been applied.
  • Properties and features 1x0.38+5x0.38 stress-relieved 1x0.38+5x0.38 prior art direction of twist S S lay length (mm) 20 20 linear density (g/m) 5.35 5.35 optical diameter (mm) 1.16 1.16 part load elongation at initial load of 50 Newton (%) 0.070 0.061 tensile test on cord not embedded in rubber : breaking load (Newton) 1703 1618 tensile strength R m (MPa) 2497 2382 total elongation at break (%) 6.69 3.25 yield strength at elongation of 0.2 % (% of R m ) 90 84 tensile test on cord embedded in rubber : breaking load (Newton) 1755 1795 tensile strength R m (MPa) 2574 2645 total elongation at break (%) 6.67 1.72 yield strength at elongation of 0.2
  • the total elongation at break of a 1+5 prior art cord is only 3.25 % and falls down to a poor 1.72 % after embedding the steel cord in rubber.
  • the invention 1+5 cord in contrast therewith, has a high elongation of 6.69 % and maintains this high level after embedding the steel cord in rubber.
  • a steel cord according to the present invention has following features which make it able for the reinforcement of elastomers such as rubber:
  • the invention is suitable for all common and available final tensile strengths from 2150 MPa to about 3500 MPa and more. Due account must, however, been taken of a drop in tensile strength of about 10 to 15% as a consequence of the thermal stress-relieving treatment. If for example, a final tensile strength of 3500 MPa is desired, the individual steel filaments must be drawn to a tensile strength of about 4000 MPa, if a final tensile strength of 2150 MPa is desired, the individual steel filaments must be drawn to a tensile strength of about 2400 MPa.

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  • Ropes Or Cables (AREA)
  • Tires In General (AREA)

Claims (12)

  1. Câble d'acier (10) conçu pour renforcer un élastomère, le câble d'acier comprenant des filaments d'acier (12, 14, 16) à structure perlitique, le câble d'acier présentant un allongement plastique et élastique (26, 28) à la rupture de x % et une capacité d'allongement élastique et plastique dans l'élastomère vulcanisé de y %, les valeurs x et y correspondant à l'équation suivante : y - 0,50 ≤ x ≤ y + 0,50.
  2. Câble d'acier (10) selon la revendication 1, caractérisé en ce que le câble d'acier possède un allongement total à la rupture égal à au moins 5 %.
  3. Câble d'acier (10) selon la revendication 1 ou la revendication 2, caractérisé en ce que le câble d'acier se trouve, dans son ensemble, dans un état de détente.
  4. Câble d'acier (10) selon la revendication 3, caractérisé en ce que le câble d'acier possède une résistance à la traction finale d'au moins 2150 MPa.
  5. Câble d'acier (10) selon la revendication 3 ou 4, caractérisé en ce que la limite d'élasticité du câble avec un allongement permanent de 0,2 % est égale à au moins 88 % de la résistance à la traction du câble.
  6. Câble d'acier (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le câble d'acier possède une structure ouverte pour permettre la pénétration de l'élastomère dans le caoutchouc.
  7. Câble d'acier (10) selon la revendication 6, caractérisé en ce que l'un des filaments d'acier (12) ou plusieurs des filaments forment un premier groupe et en ce que les autres filaments d'acier (14) forment un second groupe de deux filaments ou plus, le second groupe étant torsadé autour du premier groupe de manière à former une couche non saturée autour du premier groupe.
  8. Câble d'acier (10) selon la revendication 7, caractérisé en ce que le second groupe est constitué de trois à neuf filaments d'acier.
  9. Câble d'acier (10) selon la revendication 7 ou 8, caractérisé en ce que le premier groupe est constitué de un ou deux filaments d'acier.
  10. Câble d'acier (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le câble d'acier possède un allongement structurel (24) égal à au moins 0,5 %.
  11. Câble d'acier (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les filaments ont un diamètre compris entre 0,04 mm et 1,10 mm.
  12. Câble d'acier (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les filaments d'acier ont un revêtement en laiton et en ce qu'une couche de finition au nickel, au cobalt ou au cuivre recouvre le revêtement en laiton.
EP19970200163 1996-02-15 1997-01-22 Câble d'acier avec allongement à la rupture élevé Expired - Lifetime EP0790349B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19970200163 EP0790349B1 (fr) 1996-02-15 1997-01-22 Câble d'acier avec allongement à la rupture élevé

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP96200381 1996-02-15
EP96200381 1996-02-15
EP19970200163 EP0790349B1 (fr) 1996-02-15 1997-01-22 Câble d'acier avec allongement à la rupture élevé

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EP0790349A1 EP0790349A1 (fr) 1997-08-20
EP0790349B1 true EP0790349B1 (fr) 2000-06-28

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6883843B2 (en) 2002-03-08 2005-04-26 N.V. Bekaert S.A. Reinforced impact beam
US6887806B2 (en) 2000-05-11 2005-05-03 N.V. Bekaert S.A. Cut resistant fabric for protective textiles
US7111882B2 (en) 2002-03-08 2006-09-26 N. V. Bekaert S.A. Reinforced impact beam with woven fabric
US7337604B2 (en) 2003-07-22 2008-03-04 Nv Bekaert Sa Hybrid high elongation cord
US7487803B2 (en) 2004-05-12 2009-02-10 Nv Bekaert Sa Flat high-tensile wire as hose reinforcement

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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JP3737610B2 (ja) * 1997-07-23 2006-01-18 株式会社ブリヂストン ゴム物品補強用スチール・コードおよび該スチール・コードを用いた空気入りラジアル・タイヤ
WO1999006628A1 (fr) 1997-07-29 1999-02-11 N.V. Bekaert S.A. Cable d'acier pour plis de protection de pneumatiques
EP1284318B1 (fr) 2000-05-22 2005-09-21 Bridgestone Corporation Cable d'acier de renfort pour produit en caoutchouc, materiau composite de cable caoutchouc-acier, pneumatique radial, pneumatique radial de motocycle, et pneumatique
JP2006507972A (ja) * 2002-11-28 2006-03-09 ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム 細長金属要素を備えるインパクトビーム
CA2421387A1 (fr) * 2003-03-07 2004-09-07 Camoplast Inc. Courroies protectrices a l'interieur de chenilles
EP1655179A1 (fr) 2004-11-03 2006-05-10 NV Bekaert SA Procédé pour augmenter la résistance aux chocs d'un amortisseur de chocs
US8381505B2 (en) 2008-04-21 2013-02-26 Pirelli Tyre S.P.A. Metallic cord comprising preformed and non-preformed wires, rubber sheet comprising said cord and tyre comprising at least one layer derived from said rubber sheet
WO2015173129A1 (fr) 2014-05-13 2015-11-19 Nv Bekaert Sa Câble résistant aux entailles

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NL191315C (nl) 1981-05-08 1995-05-16 Bekaert Sa Nv Kabel voor het versterken van elastomeer materiaal en werkwijze voor het vervaardigen van een dergelijke kabel.
JPH0717126B2 (ja) * 1984-03-01 1995-03-01 株式会社ブリヂストン 高耐久性ラジアルタイヤ
JPH0718103B2 (ja) 1989-05-23 1995-03-01 興国鋼線索株式会社 タイヤ用スチールコードおよびその製造方法
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US6887806B2 (en) 2000-05-11 2005-05-03 N.V. Bekaert S.A. Cut resistant fabric for protective textiles
US6883843B2 (en) 2002-03-08 2005-04-26 N.V. Bekaert S.A. Reinforced impact beam
US7007990B2 (en) 2002-03-08 2006-03-07 N.V. Bekaert S.A. Reinforced impact beam with layered matrix
US7111882B2 (en) 2002-03-08 2006-09-26 N. V. Bekaert S.A. Reinforced impact beam with woven fabric
US7337604B2 (en) 2003-07-22 2008-03-04 Nv Bekaert Sa Hybrid high elongation cord
CN100558979C (zh) * 2003-07-22 2009-11-11 贝卡尔特股份有限公司 杂化高伸长帘线
US7487803B2 (en) 2004-05-12 2009-02-10 Nv Bekaert Sa Flat high-tensile wire as hose reinforcement

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