Supercharge Your Innovation With Domain-Expert AI Agents!

Off-the-road steel cord

A technology of steel cords and products, applied in the field of steel cords, can solve problems such as loose steel cords

Active Publication Date: 2017-08-18
NV BEKAERT SA
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the same lay direction in the strands can cause loose steel cords where the ends of the filaments or strands unravel and spread out at the severed end of the steel cord

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Off-the-road steel cord
  • Off-the-road steel cord
  • Off-the-road steel cord

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A typical steel composition for tire cord has a minimum carbon content of 0.65%, a manganese content ranging from 0.40% to 0.70%, a silicon content ranging from 0.15% to 0.30%, a maximum sulfur content of 0.03%, a maximum Phosphorus content, all percentages are by weight. Only traces of copper, nickel and / or chromium. Typical steel tire cord compositions for high tensile steel cords have a minimum carbon content of between 0.80% and 0.85% by weight. To further increase the tensile strength of the steel monofilaments, the minimum carbon content may be between 0.85% and 0.90% by weight, or even between 0.90% and 0.95% by weight. Apart from this, other alloying components such as Cr can be added.

[0027] The process of manufacturing steel monofilaments for steel cords always starts with a wire rod with the above steel composition. first by mechanical descaling and / or by 2 SO 4 Or chemical pickling in HCl solution to clean the wire in order to remove the oxides presen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an off-the-road steel cord. This invention relates to a steel cord adapted for the reinforcement of rubber product. The steel cord (30) comprising a core strand (32) and three or more outer strands (34) twisted around said core strand (32). The outer strands (34) are multi- layer strands comprising multiple steel filaments arranged in an outer strand core (36) and at least one outer strand layer (38, 40), the steel filaments in the outer strands have a round or substantially round cross-section. At least one outer strand (34) comprises flattened portions (52) and non-flattened portions (54) along its length. The flattened portions create spacing S between adjacent outer strands (34) and gaps G between adjacent filaments in the outer strand (34), which improves rubber penetration and elongation of the steel cord (30), and finally improves the impact resistance of the steel cord (30). Besides, the flattened portions (52) limit the flare of the steel cord.

Description

technical field [0001] The present invention relates to steel cords suitable for reinforcing rubber products, more particularly for heavy duty tires such as off-the-road tires and earth moving tires. Background technique [0002] Large off-the-shelf pneumatic tires used in heavy construction and earthmoving operations have much higher operating loads and inflation pressures than conventional trucks and light vehicles. Consequently, both the carcass ply and the belt ply of OTR tires exhibit enormous load-bearing capabilities and require special reinforcing cords. [0003] JP10131066A discloses a 7×7 cord satisfying this load-bearing requirement. JP2006104636A further discloses a 1×(3+9)+6×(3+9) cord, wherein the twist direction of the strands is the same as that of the cord. [0004] In addition to this, another requirement of off-the-road tires is to ensure adequate penetration of the rubber into the cords, which is achieved during the manufacture of the belt layers and in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D07B1/06D07B5/00D07B7/02
CPCD07B1/0613D07B5/005D07B7/027D07B1/0633D07B1/0626D07B2401/208D07B2401/2005D07B2401/2015D07B2205/3057D07B2205/3053D07B2201/2098D07B2201/2021D07B2201/2019D07B2801/10D07B2801/90B60C9/0007B60C2200/065B60C2009/2077B60C2009/2096B60C2009/0466B60C2009/0425B60C2009/0458B60C2009/2093B60C9/0057
Inventor 朱宏桢黄涛王钰萍魏庆元
Owner NV BEKAERT SA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com