Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrically conductive yarn with reduced torsions

a technology of torsions and conductive yarns, applied in the field of electrically conductive yarns, can solve the problems of failure of yarns and yarns may no longer provide the function of heating elements in e, and achieve the effects of increasing reducing the life expectancy of applications comprising yarns, and affecting the flexlife of yarns

Inactive Publication Date: 2011-04-07
NV BEKAERT SA
View PDF22 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a yarn for car seat heating that has an improved resistance against bending and wear. This is achieved by designing a yarn with a reduced resistance against bending and fretting, called flexlife. The invention is achieved by using a yarn with a predetermined number of torsions per meter, which is smaller than 80 per meter. The yarn comprises one or more bundles of metal fibers, with each bundle containing at least 30 metal fibers. The metal fibers can be made of stainless steel or a metal that is more conductive than stainless steel, such as copper or copper alloy. The yarn has a reduced resistance against repeated bending, which increases its flexlife. This design improves the durability and lifespan of the yarn, especially in applications where bending and wear are common, such as car seat heating.

Problems solved by technology

When repeatedly subjected to such stresses, metal fibres of the yarn may break, eventually resulting in the failure of the yarn.
As a result, the yarn may no longer provide its function as a heating element in e.g. a car seat heating.

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
  • Electrically conductive yarn with reduced torsions
  • Electrically conductive yarn with reduced torsions
  • Electrically conductive yarn with reduced torsions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023]Yarns according to the present invention comprise one or more bundles of metal fibres, each bundle comprising at least 30 metal fibres. FIG. 1 schematically depicts a cross-sectional view of a yarn 100 according to the present invention. The yarn 100 comprises three bundles 110, 120 and 130 each comprising more than 30 metal fibres 140.

[0024]In the present invention, metal is to be understood as encompassing both metals and metal alloys (such as stainless steel) or compositions. As an example, the metal fibres as applied in the present invention may comprise a stainless steel core enclosed by copper or a copper alloy. Alternatively, the metal fibres as applied in a yarn according to the present invention may have a copper core surrounded by a stainless steel mantle. Such fibres provide improved electrical properties combined with the corrosion and oxidation resistance of stainless steel. Said stainless steel is preferable chosen out of AISI 300 series such as AISI 302, 304, 31...

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

PropertyMeasurementUnit
equivalent diameteraaaaaaaaaa
equivalent diameteraaaaaaaaaa
equivalent diameteraaaaaaaaaa
Login to View More

Abstract

A yarn (100) comprising one or more bundles (110, 120, 130), each of said one or more bundles comprising at least thirty metal fibres is described. The metal fibres (140) comprise stainless steel and a metal which is electrically more conductive than stainless steel. The yarn is twisted with a predetermined number of torsions per meter, said predetermined number of torsions per meter is smaller than 80 per meter and larger than 10 per meter. By doing so, an improved flexlife of the yarn can be obtained.

Description

TECHNICAL FIELD [0001]The present invention relates to an electrically conductive yarn comprising one or more bundles of metal fibres and to its various uses.BACKGROUND ART [0002]Yarns comprising one or more bundles of metal fibres are known. Such yarns are e.g. applied in vehicle seat heating systems or heatable textiles. In these applications, the yarns are used as an electrical resistance and provided, in use, with an electric current to obtain the required heating effect. In many of the applications of such yarns, the yarns are subjected to different stress and / or strain conditions. In particular, the yarns may be repeatedly loaded under tensile and / or bending or torsion stresses, e.g. when applied in a car seat heating. When repeatedly subjected to such stresses, metal fibres of the yarn may break, eventually resulting in the failure of the yarn. As a result, the yarn may no longer provide its function as a heating element in e.g. a car seat heating.DISCLOSURE OF INVENTION [000...

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
Patent Type & Authority Applications(United States)
IPC IPC(8): D02G3/12D02G3/44H05B3/10H05B3/34B60N2/56
CPCB60N2/5685D02G3/12D02G3/446D02G3/441D02G3/28
Inventor DE GREVE, KRISAMILS, XAVIERVERSTRAETEN, STEVESPELEERS, POL
Owner NV BEKAERT SA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products