Heating yarn and woven or knitted fabric using this heating yarn

Abstract

A heating yarn includes an insulating yarn and a conductive yarn that is wound around the insulating yarn. The conductive yarn has an insulating core yarn and a plated layer (such as a copper plated layer) formed on a peripheral surface of the core yarn, and the core yarn is a high elasticity yarn (such as an aramid fiber) with an initial tensile resistance of 4.9 GPa or higher. Moreover, the heating yarn is woven in or knitted into the woven or knitted fabric as part of the constituent yarn.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2010-235846 filed on Oct. 20, 2010 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a heating yarn and a woven or knitted fabric that uses this heating yarn. More specifically, the invention relates to a heating yarn that uses a high elasticity yarn having a specified initial tensile resistance as a core yarn of a conductive yarn, such that when the heating yarn in which this conductive yarn is wound around the peripheral surface of an insulating yarn is flexed or when tensile stress is applied to the heating yarn or the like, the core yarn will not easily stretch or otherwise deform, so the plated layer formed on the peripheral surface of the core yarn, will not crack and the conductive yarn will not break. The invention also relates to a woven or knitted fabri...

AI Technical Summary

Benefits of technology

[0007]The invention thus provides a heating yarn that uses a high elasticity yarn having a specified initial tensile resistance as a core yarn of a conductive yarn, such that when a heating yarn is flexed or when tensile stress is applied to the heating yarn or the like, the core yarn will not easily stretch, so a plated layer formed on the peripheral surface of the core yarn will not crack and the conductive yarn will not break. The invention also provides a woven or knitted fabric that is useful as a heater member, in which this heating yarn is woven or knitted in as part of the constituent yarn.

[0009]With the heating yarn according to the first aspect of the invention, a high elasticity yarn that has a specific initial tensile resistance is used as the core yarn of the conductive yarn. The conductive yarn has a high flex resistance and is strong in the length direction. Therefore, when the heating yarn in which this conductive yarn is wound around the insulating yarn is flexed, the core yarn of the conductive yarn will not stretch, so the plated layer formed on the peripheral surface thereof will not crack, and when tensile stress is applied to the heating yarn, the conductive yarn will not break. Also, when the resin coating layer is formed on the surface of the plated layer, the plated layer is protected by the resin coating layer, so oxidation degradation of the plated layer, and a change in the resistance value due to that oxidation degradation, are suppressed, and wear of the plated layer is also suppressed. Moreover, when the plated layer is a copper plated layer, and a tin plated layer or a nickel plated layer is formed on the surface of the copper plated layer, the copper plated layer will be covered, and thus protected, by the plated layer formed of tin or nickel that does not oxidize as easily as copper and has good wear resistance. Therefore, oxidation degradation of the copper plated layer, and a change in the resistance value due to that oxidation degradation, can be suppressed, and wear of the copper plated layer can also be suppressed. With the woven or knitted fabric of the second example embodiment of the invention, the heating yarn of the first aspect is woven or knitted in as part of the constituent yarn, so when the woven or knitted fabric deforms due to stress being applied or the like, the plated layer of the conductive yarn will not crack and the conductive yarn will not break or the like. Accordingly, the woven or knitted fabric is able to maintain good heat generating performance when used as a heater member of a passenger vehicle or the like, for example.

Problems solved by technology

Therefore, even if stress is distributed by the stainless steel resistance heating wires being wound around the insulating wires, when the heating seat is flexed or when tensile stress is applied to the heating seat or the like, the heating body will also flex and stretch, and as a result, the stainless steel resistance heating wires, i.e., the heating body, may break.

Furthermore, when a heating body that is more flexible than the stainless steel resistance heating wires is used, e.g., when a heating body in which a plated layer is formed on the peripheral surface of a polyester fiber or the like is used, the heating body may stretch and the plated layer may crack and peel away when tensile stress or the like is applied.

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