KR100895092B1 - Electrically conductive sewing thread for power and data transmission line of smart interactive textile systems - Google Patents

Abstract

The present invention relates to an electrically conductive metal composite sewing machine and a method for manufacturing the same, comprising: a first step of winding one or more strands of conductive material on a surface of a fiber yarn in a covered state such that a plurality of twists are provided; A second step of accidentally joining the fiber yarns in which the conductive material is wound by the first step so as to have a plurality of twisted numbers; And a third step of jointing the right-bonded yarns and left-bonding them to a plurality of twisted numbers, wherein the conductive material is provided with a conductive sewing thread having an insulating coating.

Conductive, sewing thread, smart wear, smart fabric, insulation cloth

Description

Electrically conductive sewing thread for power and data transmission line of smart interactive textile systems}

The present invention relates to an electrically conductive metal composite sewing thread that can be applied to a smart fabric, and more particularly, to a conductive sewing thread for smart fabric that can be used as a power supply and data transmission line.

Smart fabric is a generic term for high-tech fabrics that can be used for smart clothing and smart interiors. In particular, smart wear is a representative technology for realizing the ubiquitous era, and refers to a new concept of future clothing combining information technology (IT), nano technology (NT), bio technology (BT) and environmental technology (ET). It is also called a 'wearing computer' because a tiny computer chip is embedded in clothes made of highly functional fibers, allowing the fiber or clothing itself to detect and react to external stimuli. Since it was first developed for military use in the United States in the mid-1990s, it is an intensive collection of future apparel technology that has been developed in a hurry by countries around the world. It is divided into functional and early stage smartwear.

Early-stage smart wear refers to a digital sensor, satellite navigation (GPS), micro-communication device, and small MP3 embedded in clothing made of high-performance fibers. This type of smart wear was already realized in the mid-1990s. The representative clothes of early smart wear include smart shirts developed for military use by Sensatex Inc. of the United States. High-performance plastic optical fibers are arranged at regular intervals on the garment, which can detect human heart rate, blood pressure and breathing, and can also recognize injuries such as gunshot wounds. Nowadays, it is used for various purposes such as for infants for medical medical sports.

Later stage smartwear refers to the future of cutting-edge clothing, where the clothing itself takes care of everything. The clothing itself can be connected to the network anytime and anywhere to do the job for you. Clothing itself is a high-performance computer that can be used to buy goods or diagnose illness. It's not a dream, but it's not just a dream, but it's a common view among experts.

As a result of various studies for realizing such smart wear, it is known to include a metallic wire in the fiber yarn and a metallic surface coating in the yarn to carry current and provide shielding from an electric field. Electroconductive composite yarns are mainly processed into textile and garment products.

Korean Laid-Open Patent Publication No. 2006-0009868 discloses an electrically conductive elastic composite yarn and a product using the composite yarn. The electrically conductive elastic composite yarn consists of an elastic member and a conductive covering filament and has an effective stretching range of about 10 to 800%. This stretching range is larger than the burst stretching of the conductive covering filament, smaller than the elastic limit of the elastic member, and the burst strength is greater than the burst strength of the conductive covering filament, which is a knitted fabric fully manufactured using a conductive elastic composite yarn, It is an object to provide woven or nonwoven fabrics. However, the thread of the same patent is difficult to extend its use to sewing thread. Since the threads and sewing thread used in general knitting or woven fabrics differ in the required strength and elongation, the manufacturing method is different. Therefore, it is difficult to use a sewing thread as a thread used as a general knitting or woven fabric.

By the way, in the case of sewing thread, the conductive thread can be inserted into the clothes by way of sewing or embroidery, so it can be applied to clothes much more easily than the method of inserting into the fabric by knitting, and also has the advantage of easy repair. Most of the conductive yarns on the market today are metal coated yarns, which are made of PBO (poly (p-phenylene-2,6-benzobisoxazole)), polyester, nylon, kevlar, and other fibers. It is a thin metal coating on the surface. In this case, the electrical resistance is very high and durability is also low.

The present inventors have proposed in the Republic of Korea Patent No. 10-0688899 for a conductive strong metal composite yarn having tensile strength, durability, wear resistance and flexibility that can be used as sewing thread of a product having a conductive function. The conductive strong metal composite yarn may be used as a sewing thread used for sewing various electronic products or products requiring electrical energy, or may be used in a variety of products requiring wear resistance such as bulletproof clothing, helmets, and gloves. However, in the case of the patent, it is an electrically conductive composite yarn designed for the purpose of providing the simplest and most durable method for providing the antistatic function of a thick fabric, and there is a limitation that it cannot be used as a power supply or a data transmission line.

Therefore, the present inventors have completed the present invention as a result of research to provide an electrically conductive sewing thread that can be used as a transmission line of smart wear, including a smart fabric.

The present invention is to provide an electrically conductive metal composite sewing thread that can be used as a power supply and data transmission line of the smart fabric.

According to a preferred embodiment of the present invention for solving the above problems, a first step of winding one or more strands of conductive material on the surface of the fiber yarn in a covered state so that a plurality of twists; A second step of accidentally joining the fiber yarns in which the conductive material is wound by the first step so as to have a plurality of twisted numbers; And a third step of jointing the right-bonded yarns and left-bonding them to a plurality of twisted numbers, wherein the conductive material is provided with a conductive sewing thread having an insulating coating. In the second step, the left coalescing is performed by chance in the third process.

According to another suitable embodiment of the present invention, the conductive material may be one covered with a protective seal of 30 denier or less.

According to another suitable embodiment of the present invention, the insulating coating may be an enamel coating.

According to another suitable embodiment of the present invention, a fiber yarn; And a conductive metal composite sewing thread made of a conductive material having an insulating coating joined to the fiber yarn by one or more strands. The conductive material coated with the insulating coating may be a metal yarn with an enamel coating. The conductive metal composite sewing thread of the present invention can be suitably used as a transmission line of a smart fabric.

According to another suitable embodiment of the present invention, the conductive material may be silver plated copper wire.

According to another suitable embodiment of the invention, the fiber yarns may be polyester.

According to another suitable embodiment of the present invention, the DC electrical resistance value of the conductive metal composite sewing thread of the present invention may be 4.69.

The electroconductive metal composite sewing thread of the present invention can be utilized as a power supply or communication transmission line of a smart fabric which is a fabric of the future concept using an insulating coated conductive material. In addition, the conductive metal composite sewing thread of the present invention has the electrical conductivity of the metal because it uses the metal filament yarn directly compared to the conventional conductive yarn, and includes a large number of metal conductive material in the sewing thread is excellent in durability, easy to repair when cutting the conductive yarn The advantage is that you can.

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

The conductive metal composite sewing thread of the present invention is a first step of winding one or more strands of conductive material on the surface of the fiber yarn in a covered state to cover the number of twists, and coincidence of the twisted yarns of the conductive material wound to the number of twists. And a third step of joining the yarns joined by chance by the second step and left-joining a plurality of twisted yarns.

The fiber yarn of the present invention is not particularly limited to the fiber material, polyester, nylon, silk, cotton and the like can be preferably used.

The conductive material may be used by covering with a protective thread of 30 denier or less in order to prevent trimming of metal which may occur during sewing, and the protective thread is not particularly limited, but polyester may be preferably used.

Moreover, it is preferable that the electrically-conductive material gave insulation coating to metal filament yarns, such as a copper wire, a silver wire, a stainless steel wire, and the conductive thread which has the electrical conductivity of a metal. The insulation coating may be a method of completely covering or braiding the yarn of the conductive material with PVC coating, non-conductive seal, enamel coating, or the like. In the case of the present invention, the enamel coating on the metal filament yarn may be most preferably used. Conductive sewing thread using a metal filament yarn coated with an enamel coating has the advantage of being closest to a general sewing thread in terms of appearance and physical properties, and it is the most inexpensive and easy to use commercially available material, and also easy to manufacture.

The number of strands of the conductive material can be appropriately adjusted according to the use of the conductive sewing thread.

The thickness of the finished conductive sewing thread may be determined by the thickness of the single strand 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. In addition, the single strand thickness of the conductive material is preferably in the range of 0.01 mm to 0.1 mm. The single strand thickness of the conductive material may be appropriately adjusted according to the type of material and the intended use thereof. 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.

The number of twists (TPM) of the conductive material wound on the surface of the fiber yarns in the first step is 20 to 300, the number of twists of the fiber yarns at the time of coincidence in the second step is 200 to 1000 TPM, The twist number is preferably 200 to 1000 TPM.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Example

Example 1

Manufacturing of Conductive Metal Composite Sewing Thread for Smart Clothing

One roll of 0.040mm enamel coated silver-plated copper wire was covered with 150 TPM on the surface of one strand of 75d / 36f polyester yarn, which was then coincided with multiple twists of 700TPM. Unite. The three strands that are joined by chance are left stranded together at 550 TPM to form a number of twists.

DC electrical resistance of the prepared conductive metal composite sewing thread was obtained as follows.

DC Resistance: (13.705 × 1.026) / 3 = 4.69 (Ω / m)

[In the above formula, 13.705 is the electrical resistance of one strand of copper conductive yarn used in Example 1, and 1.026 is a measure of the crimp rate of the yarn.]

Since the final conductive sewing thread was obtained by jointing the three strands, the DC electric resistance value of the conductive sewing thread prepared in Example 1 can be seen that the low electrical resistance is calculated to 4.69.

Example 2

Conductive sewing thread for smart clothing

After covering the surface of one strand of 150d / 72f polyester yarn with a 0.040mm insulated coated copper yarn, 150 TPM, this thread is accidentally joined to a number of twists at 650 TPM. Two strands threaded together at a total of 800 TPM are left stranded together at 45 0 TPM, resulting in a number of twists.

Example 3

Conductive Sewing Thread for Smart Fabrics

A 0.050 mm insulated coated copper yarn was covered with 150 TPM on the surface of 150d / 72f polyester yarn, and the threads were then accidentally joined to a number of twists of 700 TPM. The two strands that are joined together by chance are left joined together by 550TPM to form a number of twists.

1 is an instron (Instron) equipment according to the ASTM D2256 test method (Test method for breaking load (strength) and elongation of yarn by the single strand method) of the electroconductive metal composite sewing thread prepared in Example 1 of the present invention It is a graph showing the load-extension curve measured.

Figure 2 is a photograph showing an embodiment of a conductive metal composite sewing thread of the present invention.

Claims (7)

A first step of winding one or more strands of conductive material on the surface of the fiber yarn in a covered state so as to have a plurality of twists; A second step of accidentally joining the fiber yarns in which the conductive material is wound by the first step so as to have a plurality of twisted numbers; And Manufactured by a third process of plying the coincidence yarns and joining them to form a plurality of twisted numbers; The conductive material is an insulating coating, the manufacturing method of a conductive metal composite sewing thread characterized in that it is covered by a protective thread of 30 denier or less. The method of claim 1, wherein the insulating coating is an enamel coating. delete Fiber yarn; And It is made of a conductive material insulated coating with an enamel coating that is joined to the fiber yarn by one or more strands, The conductive material is a conductive metal composite sewing thread, characterized in that covered by a protective thread of less than 30 denier. The conductive metal composite sewing thread according to claim 4, wherein the conductive material is copper wire. The conductive metallic composite sewing thread according to claim 4, wherein the fiber yarn is polyester. The conductive metal composite sewing thread according to claim 4, wherein the DC electric resistance value of the conductive metal composite sewing thread is 4.69.

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