Electric Wiring

Abstract

An electric wire includes a conductive core, an inner sheath substantially surrounding the conductive core consisting of an extruded matrix of particulate material and binding material, and an outer sheath substantially surrounding the inner sheath.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view though a wire according to a first embodiment of the invention;

FIG. 2 is a cross-sectional view though a wire according to a second embodiment of the invention;

FIG. 3 is a cross sectional view though a wire according to a third embodiment of the invention; and

FIG. 4 is a cross-sectional view though a wire according to a fourth embodiment of the invention.

Claims

1. An electric wire, comprising: a conductive core;an inner sheath substantially surrounding the conductive core, the inner sheath consisting of an extruded matrix of particulate material and binding material; andan outer sheath substantially surrounding the inner sheath.

2. The electric wire of claim 1, wherein the inner sheath is at least 65% by weight or volume of the particulate material.

3. The electric wire of claim 2, wherein the inner sheath is between 80%-95% by weight or volume of the particulate material.

4. The electric wire of claim 1, wherein the particulate material comprises magnesium hydroxide.

5. The electric wire of claim 1, wherein the particulate material comprises a refractory material.

6. The electric wire of claim 1, wherein the binding material is a polymer or polymer blend.

7. The electric wire of claim 1, wherein the inner sheath is friable.

8. The electric wire of claim 1, wherein the outer sheath consists of a temperature resistant material.

9. The electric wire of claim 1, wherein the outer sheath consists of a polymer of fluoropolymer.

10. The electric wire of claim 1, wherein the inner and outer sheaths are immediately adjacent to one another.

11. The electric wire of claim 1, wherein the electric wire has at least two conductive cores.

12. The electric wire of claim 1, further comprising an intermediate sheath arranged between the inner sheath and the conductive core.

13. The electric wire of claim 1, wherein the inner sheath has a thickness of 0.25-0.35 mm.

14. The electric wire of claim 1, wherein the inner sheath sinters at a temperature above 50° C. to maintain the electrical integrity of the electric wire.

15. The electric wire of claim 1, wherein the outer sheath chars at a temperature above 50° C. to provide sufficient mechanical strength to maintain the electrical integrity of the electric wire.

16. The electric wire of claim 1, wherein the inner sheath chars at a temperature above 50° C. to provide sufficient mechanical strength to maintain the electrical integrity of the electric wire.