Steel cords for tire reinforcement

A technology of steel cords and filaments, used in textile cables, transportation and packaging, textiles and papermaking, etc., can solve the problems of the failure load of the cord cannot meet the requirements, the high wear of the crimping equipment, and the high continuous failure rate of the cord. , to achieve the effect of low strength loss, low continuous failure rate and low wear

Inactive Publication Date: 2011-12-07
NV BEKAERT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

which leads to a high rate of continuous failure of the cord
Accordingly, the failure load of the cord can

Method used

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  • Steel cords for tire reinforcement
  • Steel cords for tire reinforcement
  • Steel cords for tire reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] in figure 1 The first preferred embodiment is shown in. The steel cord 50 has a core layer including four first steel filaments 10 and an outer layer including six second steel filaments 20. The outer layer is helically twisted around the core layer with a core twist pitch of 23 mm, and the diameter of the steel filament 20 is 0.38 mm.

[0041] The four first steel filaments 10 are preformed in a wave shape in a single plane and they are not twisted, that is, they are parallel to each other. figure 2 with image 3 The side view and the front view of the first second steel filament 10 are respectively shown. The wave height H is 0.65mm, and the wavelength L is 5.13mm, while the diameter D f It is 0.38mm.

[0042] The six second steel filaments 20 are preformed in a multilateral direction and twisted together with an external twist pitch of 23 mm. Figure 4 with Figure 5 The side view and the front view of the second steel filament 20 are shown separately. The X axis is pa...

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Abstract

A steel cord (50) includes a core layer and an outer layer. The core layer comprises a number of first steel filaments (10) and the outer layer comprises a number of second steel filaments (20). The outer layer is helically twisted around the core layer. The first steel filaments have a lay length greater than 310 mm. At least one first steel filament (10) is preformed in a wave form in one plane. At least one second steel filament (20) is polygonally preformed.

Description

technical field [0001] The invention relates to a steel cord comprising a core layer with one or more preformed filaments and an outer layer. Steel cords can be used in reinforcements such as belts or cushioning structures of tires. Background technique [0002] Steel cords comprising preformed filaments are known in the prior art. A 4+6 structure of steel cords has also been disclosed. [0003] EP 0301776A1 provides a 4+6 silk cord structure. It discloses a low-section radial tire reinforced with steel cords consisting of two layers, a core comprising 3 or 4 filaments and an outer layer comprising a plurality of equal or Fewer filaments than core filaments, filament diameters substantially equal, core and outer filaments having the same hand but different pitch twists, tire aspect ratio up to 0.85. The patent document also discloses that the silk cord structure can be 4+6. However, the steel cords according to the patent documents have incomplete rubber penetration. A...

Claims

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Application Information

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IPC IPC(8): D07B1/06
CPCD07B2201/2028D07B2201/2039D07B2201/2029D07B2501/2046D07B1/0626D07B2201/2007D07B2401/208D07B2201/2008D07B2201/2061D07B1/062D07B1/0646D07B1/0653D07B2201/2023D07B2201/2025Y10T428/249922D07B2801/12
Inventor 齐立勋(斯图亚特)
Owner NV BEKAERT SA
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