Steel cord comprising layers having high penetrability

A cord and metal cord technology, applied in the tire field of heavy industrial vehicles, can solve the problems of shortening tire life, tread perforation, etc., and achieve the effects of high compressive strength, good mechanical properties, and high corrosion resistance

Active Publication Date: 2015-08-19
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, uneven road surfaces sometimes cause tread punctures
These perforations allow the entry of corrosive agents such as air and water, which oxidize the metal reinforcement of the crown reinforcement and significantly shorten the life of the tire

Method used

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  • Steel cord comprising layers having high penetrability
  • Steel cord comprising layers having high penetrability
  • Steel cord comprising layers having high penetrability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0086] tire according to the invention

[0087] figure 1 A tire according to the invention, indicated with reference numeral 10, is shown.

[0088] The tire 10 comprises a crown 12 reinforced with a crown reinforcement 14 , two sidewalls 16 and two beads 18 , each of these beads 18 reinforced with a bead wire 20 . The crown 12 is covered with a tread (not shown in this illustration). The carcass reinforcement 22 is wound around the two bead wires 20 in each bead 18 and comprises, for example, a turn-up 24 disposed towards the outside of the tire 10 , which in this case is shown mounted on a rim 26 . The carcass reinforcement 22 is composed, in a manner known per se, of at least one ply reinforced with cords, called “radial” cords, which means that these cords are arranged almost parallel to each other and from one bead Extends to the other bead so as to be formed between 80° and 90° from the circumferential median plane (the plane perpendicular to the axis of rotation of th...

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Abstract

The invention relates to a steel cord (30) comprising cylindrical layers, said cord including: an inner layer (C1) formed by M wires, an intermediate layer (C2) formed by N wires helically wound around the inner layer (C1), and an outer layer (C3) formed by P wires helically wound around the intermediate layer (C2), in which the inter-wire distance D2 of the wires of the intermediate layer (C2) is greater than or equal to 25 µm and the inter-wire distance D3 of the wires of the outer layer (C3) is greater than or equal to 25 µm.

Description

technical field [0001] The present invention relates to cords with cylindrical layers which can be used in particular to reinforce tires, in particular tires for heavy industrial vehicles. Background technique [0002] A tire with radial carcass reinforcement comprises a tread, two inextensible beads, two sidewalls connecting the beads to the tread, and a tire circumferentially disposed between the carcass reinforcement and the tread. Belt or crown reinforcement. This crown reinforcement comprises a plurality of rubber plies possibly reinforced with reinforcing elements or reinforcements, for example cords or monofilaments of metal or textile type. [0003] The crown reinforcement of a tire usually consists of at least two superimposed plies, sometimes called working plies or cross plies, with reinforcing cords, usually made of metal, arranged nearly parallel to each other within the ply, but from The ply is crossed from one ply to the other, that is to say inclined symmet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B1/06
CPCD07B2201/2011D07B2201/2006D07B1/0633D07B2205/3067D07B2205/3028D07B2401/208D07B2201/2037D07B2501/2046D07B2201/203D07B2205/3071D07B2205/306D07B2201/2005D07B2201/2097D07B2205/3021D07B2201/2027D07B2201/2004D07B2201/2003D07B5/12D07B2201/2051D07B2201/204D07B2201/2061D07B2201/2002D07B2201/2031D07B2205/3089D07B2401/207D07B2205/3092D07B2205/3035D07B1/14D07B1/0613D07B2201/206D07B2201/2095D07B2201/2036D07B1/0626D07B2201/2081D07B2205/3042D07B2201/2029D07B2801/12D07B2801/10D07B2801/14D07B2801/18Y10T428/12333D02G3/38D02G3/12D02G3/36D02G3/446D02G3/48B60C9/0007
Inventor E·克莱芒S·霍林格
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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