Conductive filament

a technology of conductive filament and conductive filament, which is applied in the direction of weaving, transportation and packaging, yarn, etc., can solve the problems of flaking or peeling, severe deterioration of yarn properties, and inability to completely accep

Inactive Publication Date: 2005-08-04
TEIJIN MONOFILAMENT U S +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0020] The secondary component may comprise between 0.5% and 50% by weight of the multi-component yarn while th...

Problems solved by technology

This is not wholly acceptable because carbon or carbon loaded polymeric resin does not adhere well which causes flaking or peeling.
Because relatively large percentages of carbon must be c...

Method used

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  • Conductive filament
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Embodiment Construction

[0035] Referring now in more detail to the drawings, the invention will now be described in more detail.

[0036] Carbon nanotubes are extremely small conductive elements which have found use with polymers as a conductive additive. A primary advantage of carbon nanotubes is that they possess a higher aspect ratio than carbon black particles or chopped carbon which allows for a lower additive loading while maintaining adequate levels of conductivity.

[0037] Carbon nanotubes comprise elongated particles which tend to intertwine and have a low sensitivity to shear fields. This provides the capability of elongating the polymeric resin containing carbon nanotubes without entirely severing the carbon nanotube agglomerates which are formed within the polymer. FIG. 4 schematically shows generally the manner in which carbon nanotubes can be distributed in a polymeric resin.

[0038] In a conductive yarn it has been most difficult to produce a yarn which retains most of the desired fiber characte...

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Abstract

A multi-component conductive yarn which includes a primary component and a secondary component. The primary component consists of at least one elongated filament formed of polymeric material while the secondary component consists of a blend of polymeric material and carbon nanotubes. The secondary component is bonded with the primary component along its length. The carbon nanotubes comprise up to 20% of the secondary component. The conductive yarn comprises no more than 10% carbon nanotubes.

Description

DEFINITION OF TERMS [0001] Filament—a shaped body, usually formed of polymeric material, of relatively small cross section and of indefinite length. [0002] Yarn—here: A product formed of at least one filament (=monofilament) or an assembly of filaments (=multifilament) [0003] Multi-Component Yarn—A yarn formed of two or more different materials and / or of two or more different yarns. [0004] Conductivity—definition of what is considered to be conductive BACKGROUND OF THE INVENTION [0005] It has long been known to produce conductive yarns from thermoplastic polymers which are combined with a conductive material such as carbon. In many instances the carbon is combined with the yarn as a coating. This is not wholly acceptable because carbon or carbon loaded polymeric resin does not adhere well which causes flaking or peeling. Another concern is the mass of carbon required in order to generate an acceptable level of conductivity. Because relatively large percentages of carbon must be comb...

Claims

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Application Information

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IPC IPC(8): D01F1/09D01F8/04D01F8/14D02G3/40D02G3/44D03D15/00
CPCB82Y30/00D01F1/09D01F8/14Y10T428/2933D02G3/441D10B2101/12D02G3/404D01D11/06
Inventor CRAWFORD, JULIAN S.TRAETZ, FREDERICO
Owner TEIJIN MONOFILAMENT U S
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