KR101015563B1 - Electrically conductive metal composite embroidery yarn and embroidered circuit using thereof - Google Patents

Abstract

The present invention relates to an electroconductive metal composite yarn for embroidery and an embroidered electric circuit using the same, and more particularly, to an electroconductive metal composite yarn for embroidery and embroidery circuit for power supply and signal transmission lines. will be. The present invention provides an embroidery circuit comprising a metal composite yarn and a non-conductive fabric, wherein the conductive metal composite yarn is formed on the non-conductive fabric in a embroidery form.

Smart Textile, Metal Composite Embroidery, Embroidery Circuit, Electrical Conductivity, Power Supply Line

Description

Electrically conductive metal composite embroidery yarn and embroidered circuit using according to the present invention

The present invention relates to an electrically conductive metal composite yarn for use in smart textiles and embroidery circuits using the same, and more particularly to an electrically conductive metal composite yarn for smart textiles for use as a power supply and signal transmission line and an embroidery circuit using the same. It is about.

Smart interactive textile systems are intelligent textile systems that create a smart environment for users by spontaneously responding to and reacting to external stimuli. In order to realize such a smart textile system, a textile infrastructure that electrically interconnects sensors, actuators, power sources, data processing and communication devices must be in place. Furthermore, the textileization of these electrical devices must be done.

An electronic circuit is an electrical circuit that connects an electric conductor so that electric current flows through an electronic device and operates according to the purpose. Electronic circuits widely used in current electrical devices are printed circuit boards (PCBs), which use conductive or signal lines wet-etched from synchronous boards to non-conductive boards. Printed circuit boards are rugged, inexpensive, and highly reliable, but rigid, heavy and space-constrained. Flexible printed circuit board (FPCB) that improves these shortcomings uses a circuit board coated with copper foil on a flexible polyimide film, which is easy to form fine patterns, has excellent flexibility, saves space and is light. It is widely used in display products such as mobile phone folders, LCD, PDP modules, etc. However, the production process is complex, there is a constraint that the production cost is increased and the working environment is harmful, there is a disadvantage in that the copper foil (copper foil) is disconnected by severe deformation due to the limitation in flexibility. The EU's STELLA project uses silicon to make stretchable electronics more flexible and flexible than flexible printed circuit boards for use as comfortable integrated wearable clothing or medical systems that are non-responsive to living organisms. They are working to embed the same electronics, power supplies, sensors, actuators, switches, and displays used in rigid printed circuit boards on elongated substrates like polyurethane and polyurethane. However, this method is not a fiber processing method using a textile product, so there is a limitation in utilization to commercialize it into various smart textiles.

US Patent Publication No. 2006-0289469 discloses a flexible circuit product that can work properly even when attached to the clothes to overcome the disadvantages of the PCB or FPCB. This patent proposes a product which embroiders a circuit on a fabric fabric using silver coated nylon yarn and a flexible circuit made by etching the silver coated nylon fabric in a desired shape. The circuit has the advantage of being flexible, thin, light and adaptable to clothing. However, silver-coated textile products have a limited level of electrical resistance that can be realized compared to metal filament yarns or metal plates, and therefore, there are limitations in using a large number of metal-coated yarns or multiple layers of stitching to lower the electrical resistance. Therefore, the circuit is constructed mainly in the form of thick lines or faces because there is a limit in providing the required conductivity in the thin linear shape of the conductive chamber. Therefore, when applied to clothing or other textile products, it is weak in washing and friction durability, and there is a process limitation that PVC coating for electrical insulation is not directly used as an embroidery thread but relies on an applique.

Accordingly, there is a need for a conductive embroidery circuit having laundry durability, friction durability, strength capable of maintaining electrical performance against external forces, and lower electrical resistance.

The present invention provides a metal composite yarn having an electric conductivity and durability required for a real smart textile system product, an embroidering processibility (embroidering processibility), an electrically conductive embroidery circuit using a non-conductive fiber fabric, and a smart textile system using the same. It aims to do it.

In order to solve the above problems, according to a preferred embodiment of the present invention, the conductive embroidery, characterized in that the metal composite yarn and non-conductive fabric, the metal composite yarn is formed on the non-conductive fabric in the form of embroidery Provide a circuit.

According to another suitable embodiment of the present invention, the non-conductive fabric provides a conductive embroidery circuit characterized in that the warp or weft yarn is monofilament, and the weaving density of the warp or weft yarn is similar.

According to another suitable embodiment of the present invention, the metal composite yarn is a first step of winding one or more strands of metal filament yarn on the surface of the fiber yarn in a covered state to a plurality of twisted number; A second step of accidentally joining the fiber yarns wound with the metal filament by the first step so as to have a plurality of twisted numbers; And a third step of plying the coincidence yarns and joining them so that a plurality of twisted yarns are stitched together.

According to another suitable embodiment of the present invention, the metal composite yarn is a first step of winding one or more strands of fiber yarn in a covered state to a plurality of twisted number on the surface of the metal filament yarn; Provided is an electroconductive embroidery circuit characterized in that the second step of forming a plurality of metal filament yarn wound by the fiber yarn by the first step, the left and the back joints to a plurality of twisted yarns.

According to another suitable embodiment of the present invention, the metal filament yarn is made of silver, copper, stainless steel, and provides an electrically conductive embroidery circuit, characterized in that the thickness of the single strand is 0.01mm ~ 0.1mm.

According to another suitable embodiment of the present invention, the metal filament yarn provides an electrically conductive embroidery circuit, characterized in that the insulation coating.

According to another suitable embodiment of the present invention, the insulating coating provides an electroconductive embroidery circuit, characterized in that the enamel coating.

According to another suitable embodiment of the present invention, the metal filament yarn provides an electrically conductive embroidery circuit, which is covered by a protective thread of 30 denier or less.

Embroidery circuit using the metal composite yarn of the present invention is a softness, lightness, environmental friendliness, productivity, design which is a disadvantage of the conventional printed circuit board (PCB) or flexible printed circuit board (FPCB) when applied to general clothing and textile products Its performance is improved, and the electrical conductivity and durability are significantly improved than the metal coated fiber embroidery circuit.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Of the present invention Metal composite yarns can control the type of metal filament, the number of strands, and the method of joining to provide the electrical and physical performance of the conductor required by the smart textile system. Metal composite yarn used in the present invention is composed of a metal filament yarn and a fiber yarn to protect and support it, the method of compounding the metal filament yarn exposed to the surface of the yarn and the two compounded so that the metal filament yarn is placed in a relatively constant position inside the yarn It can be prepared in two ways.

As a first method of manufacturing the metal composite yarn of the present invention, a plurality of covered or twisted composite single yarns are twisted in a direction opposite to that of the single yarns so that the metal filament yarns are twisted about 20 to 1000 TPM on the surface of the fiber yarns. 200 ~ 1000 TPM Specifically, the first step of winding one or more strands of metal filament yarn in a covered state to cover the number of twists on the surface of the fiber yarn, and the second process of accidentally joining the fiber yarns wound around the metal filament yarn to the number of twists And and the metal composite yarn can be manufactured by the third step of the left jointed by the second step of the jointed by the twisted yarn to be a plurality of twisted yarns.

The number of twists (TPM) of the metal filament yarn wound on the surface of the fiber yarn in the first step is 20 ~ 400TPM, the number of twists of the fiber yarn during coincidence joining in the second step is 100 ~ 1000TPM, the left-wing joint in the third step The number of twists of time is preferably 100 to 1000 TPM.

As a second method of manufacturing a metal composite yarn, a plurality of single yarns manufactured by covering 300 to 2000 TPM of fiber yarns with a metal filament yarn as a screening are joined together by twisting in a direction opposite to the covered direction of 100 to 1000 TPM. will be.

A first step of winding one or more strands of fiber yarn covered on the surface of the metal filament yarn in a number of twisted yarns, and a second step of joining a plurality of the metal filament yarns in which the fiber yarns are rolled up and joined in a plurality of twists It is manufactured by a process.

In the case of using the metal composite yarn manufactured by the first method, the success rate of the embroidery is very high, the strength and durability of the finished product are good, and it is particularly preferable for a product requiring an ohmic contact with the outside. The second method is preferred even if the workability is low in electrical circuits requiring high electrical homogeneity in which the electrical resistance of the wire and the spacing between the wires must be constant.

Although the fiber yarn of the present invention is not particularly limited to the fiber material, a dielectric such as polyester, nylon, silk, cotton, etc. may be preferably used.

Used in the metal composite yarn of the present invention It is preferable that the metal filament yarn is made of an electrically conductive metal filament yarn such as silver, copper, stainless steel, or the like, or an electrically conductive yarn having a metal's electrical conductivity as it is, or an insulating coating of the electrically conductive yarn. The insulation coating may be a method of completely covering or braiding the yarn of the conductive material with PVC coating, non-conductive seal, or enamel coating. In the case of the present invention, an enamel coated metal filament yarn may be preferably used. The electroconductive metal composite yarn using metal filament yarn coated with enamel coating is the closest to general sewing thread and embroidery thread in terms of appearance and physical properties, and it is the cheapest and easy to use commercially available material. It has the advantage of being easy. The number of strands of the metal filament yarn can be properly adjusted according to the use of the electrically conductive metal composite yarn.

The metal filament yarn may be used by covering it with a protective thread of 30 denier or less to prevent damage to the metal that may occur during the embroidery process, and the protective yarn is not particularly limited, but polyester may be preferably used.

The thickness of the finished electroconductive metal composite yarn may be determined by the single strand thickness of the fiber yarn and the conductive material, and may also be determined by the addition or subtraction of the joining process.

The thickness of the fiber yarn of the present invention is preferably in the range of 50 to 300 denier. And the single strand thickness of the metal filament yarn is preferably 0.01mm ~ 0.1mm range. The single-stranded thickness of the metal filament yarn may be appropriately adjusted according to the type of material and the intended use. For example, when used as a transmission line for clothes, silver plated copper wire with an enamel coating may be used with a thickness of 10 to 50 microns, and when used for interior textiles, it is preferable to use a copper wire having a thickness of 10 to 100 microns.

Embroidery circuit using the metal composite yarn of the present invention can manufacture a metal composite yarn to support the size of the power required by the system and have a structure to maximize the signal transmission efficiency and can support the embroidery pattern of the metal composite yarn It can be produced using a non-conductive fabric as a substrate. Embroidery metal composite yarn may be prepared by appropriately adjusting the conditions of the machining method in order to adjust the electrical conductivity, workability, thickness. Embroidery circuits designed for the performance of metal composite fabricators manufactured in this way are applied to various smart interactive textile systems such as resistive heaters, antennas, power and signal transmission lines, sensors, textile keyboards, switches, displays and communications, and wearable electronics. Application is possible.

The substrate fabric for embroidery used in the present invention may be a fabric, knitted fabric, nonwoven fabric or the like manufactured using non-conductive materials such as nylon, polyester, acrylic, spandex, cotton, wool, and silk. Since the metal composite yarn of the present invention is made by combining a very thin metal yarn and a relatively thick common yarn having different physical properties, the metal composite yarn investigation is required to manufacture a smart textile product requiring uniform electrical performance such as an antenna circuit. Embroidery circuit using must have uniform appearance and shape stability. In this case, fabrics with high form stability and strength capable of supporting the embroidery process of metal composite embroidery should be used. Especially, it should be free from discomfort such as clothing and applied to products requiring lighter and smaller shapes. In order to achieve this, a thin material is required. For this purpose, it is preferable that the warp or weft of the fabric is a fine fiber having a fineness of about 10 to 50 denier as the synthetic fiber. In addition, the fabric used in the embroidery circuit of the present invention is preferably woven at a high density of about 150 ~ 300 books per inch and weaving density of the warp or weft yarn is similar to minimize the elongation of the fabric. In addition, by weaving the density of the weft yarn to the same as the slope as possible, it is possible to manufacture a fabric with a uniform tensile properties in the theodolite.

Metal composite embroidery embroidery circuit of the present invention can be manufactured as shown in Figure 4, 5 and 6. The metal composite embroidery thread embroidery circuit can be manufactured by forming a circuit using a metal composite embroidery thread on the fabric fabric using an embroidery method, and the circuit patterning can be made in an appropriate form according to the use. For example, it can be shaped into a free design such as an antistatic material quilted in various shapes, a power supply line made in a fashion shape, a resistive heater, a spiral sensor, a fractal antenna, a keypad or a switch. Designed to take into account the impedance, inductance, and capacitance of the circuit elements, the circuit pattern can be finely adjusted in shape and size to 0.2 mm using the precision computerized embroidery techniques currently used in the textile industry. In case of using metal composite yarns including metal filament yarn coated with enamel, it is advantageous to make various types of textile loop antennas because air bridge can be made by the overlap of embroidery lines.

Hereinafter, the present invention will be described in more detail with reference to Examples, but embodiments according to the present invention can be modified in many different forms, and the scope of the present invention is construed as being limited to the embodiments described below. Can not be done.

Example 1

smart For textile  Electrical conductivity Metal composite  Produce

A roll of enamel coated silver-plated copper wire (DC resistance of 13.6 m / m) with a diameter of 0.040 mm was covered with 150 TPM on the surface of one strand of 75 d / 36f polyester yarn. The yarns were joined by chance to form multiple twists of 700 TPM. The three strands, which were coincidentally joined, were composited by left marginal coalescence at 550 TPM.

The DC electrical resistance of the prepared electroconductive metal composite yarn was about 4.69 mA / m.

Example 2

smart For textile  Electrical conductivity Metal composite  Produce

A silver-plated copper wire (DC resistance of 13.4 Ω / m) with a diameter of 0.040 mm was covered at 150 TPM on the surface of a single strand of 75d / 36f polyester yarn, and then the thread was subjected to a number of 700 TPM. It was coincidence to be twisted. The three strands that were joined by chance were joined by a left fusion of 550 TPM.

The DC electrical resistance of the prepared electroconductive metal composite yarn was about 4.6 mA / m.

Example 3

smart For textile  Electrical conductivity Metal composite  Produce

A composite of 1 plywood 3 strands prepared by covering 800 TPM of polyester yarn with a composite of silver-plated copper wire (DC resistance of 13.7 Ω / m) with a diameter of 0.040 mm in diameter is 450 TPM stranded. It was.

The DC resistance of the manufactured conductive metal composite yarn is about 4.78 dl / m.

Example 4

Textile  Transmission line manufacturers

The metal composite yarn prepared in Example 1 was embroidered on a normal polyester fabric with a stitch size of 2 mm and a line spacing of 0.8 mm. The DC resistance of the manufactured textile transmission line was about 1.5 mA / m.

Example 5

Round Spiral Inductor Embroidery Circuit Manufacturing

A silver-plated copper filament of 0.040 mm diameter (13.7 mA / m DC resistance) was covered on a surface of one strand of polyester yarn of 75d / 36f at 150 TPM, and the thread was then subjected to a number of 550 TPM. It was coincidence to be twisted. A metal inductor fabricated by incorporating three strands of coincidentally filament at 400 TPM was fabricated on a polyester fabric fabricated similarly to warp and weft yarns to fabricate a textile inductor. Inductance, resonant frequency and phase of the manufactured textile inductor are shown in Table 1 and FIG. 7.

TABLE 1

shape inductance
(μH) Resonant frequency
(MHz) Phase
(˚) Outer diameter (mm) Turns () Line thickness (mm) 40 6 2 1.44 53.64 78.21

Example 6

Square spiral inductor embroidery circuit manufacturing

A silver-plated copper filament of 0.040 mm diameter (13.7 mA / m DC resistance) was covered on a surface of one strand of polyester yarn of 75d / 36f at 150 TPM, and the thread was then subjected to a number of 550 TPM. It was coincidence to be twisted. A metal inductor fabricated by incorporating three strands of coincidentally filament at 400 TPM was fabricated on a polyester fabric fabricated similarly to warp and weft yarns to fabricate a textile inductor. Inductance, resonant frequency and phase of the fabric inductor is shown in Table 2 below.

TABLE 2

shape inductance
(μH) Resonant frequency
(MHz) Phase
(˚) Long side (mm) Turns () Line thickness (mm) 52 7 1.6 3.382 52.6 85.02

1 is a graph showing the results of measuring the DC resistance of the electroconductive metal composite yarn prepared in Example 2 of the present invention.

2 is an instron according to ASTM D2256 test method (Test method for breaking load (strength) and elongation of yarn by the single strand method) of the electroconductive metal composite yarn prepared in Examples 1 and 2 of the present invention Instron 5543) is a graph showing the stress-strain curve (stress-strain curve) measured by the instrument.

Figure 3 is a photograph showing an embodiment of the electroconductive metal composite yarn used in the embroidery circuit.

Figure 4 is a photograph showing an embodiment of the embroidery circuit of the present invention.

5 is a photograph showing an embodiment of the embroidery circuit of the present invention.

Figure 6 is a photograph showing an embodiment of the embroidery circuit of the present invention.

7 is a graph showing the frequency-impedance-inductance of the embroidery circuit manufactured in Example 5 of the present invention.

Claims (8)

In the embroidery circuit consisting of a metal composite embroidery and a non-conductive fabric, the metal composite embroidery thread forms a circuit on the non-conductive fabric in the form of embroidery, Embroidery circuit, characterized in that the metal composite yarn is less than 5Ω / m resistance. The embroidery circuit of claim 1 wherein the fabric of the non-conductive fabric is warp or weft yarn monofilament, and the weaving density of warp and weft yarn is similar. The method of claim 1, wherein the metal composite yarn is wound on the surface of the fiber yarns one or more strands of metal filament yarn wound in a covered state to a plurality of twisted number; A second step of accidentally joining the fiber yarns of the metal filament yarn wound by the first step so as to have a plurality of twisted numbers; And Embroidery circuit characterized in that manufactured by the third step of joining the left side of the right jointed yarn to join a plurality of twisted yarns. 2. The method of claim 1, wherein the metal composite yarn is wound in a first step of winding one or more strands of fiber yarn in a covered state to a plurality of twists on the surface of the metal filament yarn; Embroidery circuit, characterized in that by the second step of filamenting the plurality of twisted metal filament yarn wound in the fiber yarn by the first step so that a plurality of twists. The embroidery circuit according to claim 3 or 4, wherein the metal filament yarn is made of silver, copper, and stainless steel, and the single strand has a thickness of 0.01 mm to 0.1 mm. The embroidery circuit according to claim 3 or 4, wherein the metal filament yarn is covered with an insulating coating. 7. An embroidery circuit according to claim 6, wherein said insulating coating is an enamel coating. 5. The embroidery circuit according to claim 3 or 4, wherein the metal filament yarn is covered by a protective thread of 30 denier or less.

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