FABRIC CONTAINING A CONDUCTIVE YARN AND APPARATUS FOR MAKING THE SAME

Abstract

A fabric and an apparatus for making the same are disclosed. A conductive yarn has a non-conductive core thread and a fine metal thread wound around the surface of the non-conductive core thread. The fine metal thread is guided by an apparatus to wind around the surface of the non-conductive core thread in a spiral form. The apparatus has a base station, an axle on the base station, and a spool set on the axle for twisting the fine metal thread. The core thread passes through the center of the axle, and the axle is driven by a power to drive the spool to rotate, thuds winding the fine metal thread around the surface of the non-conductive core thread so as to form an elastic and flexible conductive yarn.

Claims

1. A fabric comprising: a plurality of conductive metal wires extending in a warp direction, which are limited to two sides of the fabric in 0.5 to 0.6 centimeters, a plurality of non-conductive threads extending in the warp direction, which are limited to a central section part of the fabric, and: a plurality of conductive yarns extending in a weft direction, whereby interlacing the fine metal threads of the conductive yarn with the conductive metal wires of the warp direction to form a conductive fabric.

2. The fabric as recited in claim 1 wherein the conductive yarn Includes: a non-conductive core thread, made of a plurality of fibers; and; a fine metal thread, wound around the surface of the non-conductive core thread, wherein the fine metal thread is wound around the surface of the core thread in a spiral form to form the conductive yarn.

3. The fabric as recited in claim 2, wherein the diameter of the conductive metal wire ranges from 0.05 to 0.12 m/m.

4. The fabric as recited in claim 3, wherein the diameter of the fine metal thread ranges from 0.02 to 0.12 m/m.

5. The fabric as recited in claim 4, wherein the fine metal thread wound around the non-conductive core thread is wound at 70 to 125 coli per centimeter of the non-conductive core thread.

6. The fabric as recited in claim 5, wherein a power supply unit provides 0 to 24 Volts direct current when the fabric is conducted.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a cross-sectional view of an apparatus for making a conductive yarn according to the embodiment of the present invention;

[0025] FIG. 2 is a schematic view of a core thread according to the embodiment of the present invention;

[0026] FIG. 3 is a schematic view of a fine metal thread according to the embodiment of the present invention;

[0027] FIG. 4 is a schematic view of a conductive yarn according to the embodiment of the present invention;

[0028] FIG. 5 is a schematic view of a metal conductive wire according to the embodiment of the present invention; and

[0029] FIG. 6 is a schematic view of a cloth according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0030] FIG. 2 to FIG. 4 show schematic views of a core thread, a fine metal thread, and a conductive yarn respectively according to the embodiment of the present invention. A conductive yarn comprises a non-conductive core thread 1 and a fine metal thread 2 wound around the surface of the core thread 1. The non-conductive core thread 1 is made of a plurality of fibers. The fine metal thread 2 is conductive and made of gold, silver, copper, tungsten, and molybdenum microfilament etc., for example. The diameter of the fine metal thread 2 ranges from 0.02 to 0.12 m/m. The fine metal thread 2 is guided by an apparatus to wind around the surface of the core thread 1 in a spiral form so as to form an elastic and flexible conductive yarn 3.

[0031] The apparatus for making the conductive yarn according to the embodiment of the present invention is shown in FIG. 1. The apparatus comprises a base station 7, an axle seat 70, an axle 71, a base 72, a turning wheel 721, a spool 73, a first power source 74, a spindle 75, and a second power source 76.

[0032] The axle seat 70 is set on the base station 7, and the axle 71 has a hole 711 along its center and is embedded on the axle seat 70. The base 72 is mounted on the axle 71, and the turning wheel 721 is set underneath the base 72. The spool 73 is twisted around by the fine metal thread 2 and is embedded on the base 72. A flange 4 is set on the axle 71 for positioning the spool 73. The first power source 74 is set on the base station 7 for driving a driving wheel 741 and the driving wheel 741 is engaged with the turning wheel 721. The spindle 75 is twisted around by the core thread 1 and is set under the base station 7. The core thread 1 is through the hole 711 of the axle 71 and then the fine metal thread 2 is wound around the surface of the core thread 1 to form a conductive yarn. The second power source 76 is set above the base station 7 for driving a take-up spool 77 for twisting the conductive yarn.

[0033] Please refer to FIG. 1. When the apparatus is actually used to making the conductive yarn, the non-conductive thread 1 is wound around the spindle 75 and is guided by several guide pulleys 78 to pass through the hole 711 of the axle 71 and to wind around the take-up spool 77. Next, the spool 73 twisted around by the fine metal thread 2 is embedded on the base 72, and a limiting column 720 is set on the base 72 for positioning the spool 73. The flange 4 set on the axle 71 is used to position the spool 73. In the beginning, the fine metal thread 2 is wound around the core thread 1. A controller 8 is used to control the first power source 74, the second power sources 76, and the take-up spool 77 and to set the rotation speed ranging from 0 to 4800 rpm. The axle 71 is driven by the first power source 74 to drive the spool 73 to rotate, meanwhile the second power source 76 drives the take-up spool 77 to rotate for pulling the core thread 1, thereby parabolically winding the fine metal thread 2 around the surface of the core thread 1 in a spiral form according to the rotation speed of the apparatus. When the non-conductive core thread is moved up per centimeter, the fine metal is wound around the surface of the non-conductive core thread at 70 to 125 coli so as to form the conductive yarn 3 capable of generating heat. Finally, the conductive yarn 3 is wound around the take-up spool 77.

[0034] Next, please refer FIG. 2 to FIG. 6. While manufacturing plain or blended fabric, the conductive yarn 3 is utilized to be weft yarn and the warp yarn is a regular non-conductive yarn 5 with different colors. The weft yarn and the warp yarn are interlaced with each other to manufacture various types of clothes and carpets with conductivity and well flexibility, and the clothes and carpets could be dyed, printed, or figured damask. In addition, the conductive yarn 3 could be made into fiber with different diameter for a wide range of applications. For example, a fine conductive yarn 3 could be made into regular fabric, bed sheets, coverlets, curtains, or various kinds of conductive clothes capable of generating heat for keep warming Or, a thicker conductive yarn 3 could be woven with general thicker yarn to produce various kinds of electro-heating blankets, carpets, or mat for melting snow.

[0035] The principle and function of the conductive yarn and the apparatus for making the same are described below.

[0036] When producing or weaving various fabrics, a plurality of conductive metal wires 6 limited to two sides of the fabric in 0.5 to 0.6 centimeters are disposed in the warp direction of fabric A to be conductive yarns, and the general non-conductive yarns 5 are limited in the middle part of the fabric A in the warp direction. The conductive metal wires 6 are fine copper wires or sliver wires with diameter ranging from 0.05 to 0.12 m/m, and the non-conductive yarns 5 could be different color or made of different materials. The conductive yarns 3 that include the core threads 1 made of a plurality of fibers and the fine metal threads 2 wound around the core threads 1 are disposed in the weft direction. The fine metal threads 2 wound around the surface of the core threads 1 in the weft direction are interlaced and woven with the conductive metal wires 6 (fine copper wires or silver wires) on two sides of the fabric in the warp direction so as to form a conductive path. A power supply unit 9 provides alternating current (AC) or direct current (DC) power, 0V to 24V, to the conductive metal wires 6 disposed on the two sides of the fabric A for generating heat. Moreover, the voltage (V), current (A), temperate (T), and time could be fine tuned by a computer, so the fabric could generate heat to provide desired temperature ranging is from 0 C. to 65 C. Therefore, a required uniform temperature is generated among yarns of the fabric A. Therefore, the fabric A saves power and there is no risk of electric shock and electromagnetic wave.

[0037] In use, when a fixed or moveable carpet is placed on the ground indoors for providing warmth, each small unit in one plane within the same unit area generates uniform heat. Because the hot air rises naturally, there is not necessary to deliver hot air by blowers. Therefore, the heat from electric carpets produced by fabric containing conductive yarns of the present invention naturally rises from the floor or the bottom of the carpet to each corner of the space until the temperature is raised to a uniform value. There is no dryness, noises or other uncomfortable feelings caused by hot air.

[0038] Moreover, the fabric containing the conductive yarn of the present invention could be cut along the weft direction. The cutting length and size are determined according to the requirements. The conductive metal wires 6 on the two sides of the cut fabric are connected in parallel or in series and conducted with electricity so as to form another piece of fabric capable of generating heat. The fabric capable of generating heat could be utilized to make the article of daily use for resisting cold, such as bed sheets, mattress, coverlets, cushion, curtains, and wall covering, or be woven into different size of blanket, carpet, or mat for melting snow which is laid on the floor without construction and is very safety and convenient to provide heat indoor. The foregoing fabric could be also made into tent or diving suit.

[0039] However, the foregoing embodiments and drawings does not limits the product structures or uses of the present invention, it will be obvious to those skilled in the art that various modifications may be made without departing from the spirit and the scope of the present invention.