KR101938214B1 - Flexible printed electrically conductive fabric and method for fabricating the same - Google Patents

Abstract

The present invention relates to an electrically conductive fabric and a method of manufacturing the same, wherein a primer layer or an upper portion of a base layer without a primer layer is engraved to form a preliminarily designed electrical pattern, and the engraved surface is filled with a conductive material to form a conductive layer Conductive fabric and a manufacturing method thereof. Particularly, in the case of a multi-layered fabric having a heat generating layer or a light emitting layer, the surface uniformity is poor, resulting in durability and circuit breakage, and also the flexibility of the fiber is poor. Accordingly, the conductive layer is formed by the above-described intaglioing method to improve the surface uniformity, thereby improving the durability and fiber flexibility and preventing the disconnection of the circuit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrically conductive fabric,

The present invention relates to an electrically conductive fabric and a method of manufacturing the same, and more particularly to an electrically conductive fabric capable of forming a conductive circuit pattern freely or arbitrarily, and a method of manufacturing the same.

Smart Wear is a new product designed to use digital functions anytime and anywhere by incorporating signal advancement fiber technology and embedding various digital devices within the textile fashion products. In other words, maintaining the properties of textiles or clothing is a new type of clothing that incorporates the necessary digital functions in textile materials and clothing. For this reason, it is necessary to transmit digital signals while exhibiting tactile properties and physical properties comparable to ordinary fabrics. Therefore, it is possible to collectively refer to a new concept of clothing which combines the functions (Hifunction materials properties) of the fiber or the garment itself to sense the external stimulus and itself, and the digitalized properties of the garment and the fabric itself.

Smart Wear, which has been developed for military use since the mid 1990s, is currently being actively developed in the clothing and medical fields. In particular, smart materials using printing electronics can be widely used in military textile products of wearable computers. In the smart material, when the printing electronic technology is used as the interconnection method of connecting the conductive fiber fabric and the various parts having the characteristics of the clothes and the electric characteristics, the fabric-based electronic circuit can be designed and thus the application value is high. For example, when printing electronic technology is applied to military uniforms, there is a possibility of weight reduction and volume reduction. Accordingly, it becomes possible to develop army uniforms in which a wound healing function and a communication function are integrated. In modern warfare contemporary warfare, soldiers must carry more than 45 kilograms of equipment when fully armed, so the development of this technology is urgently required. To manufacture such a smart apparel, there is a need to integrate various elements for the body area network (BAN).

Various methods have been proposed for this purpose, for example, to form a fabric with an insulated wire, an electrically conductive metal sheath or an insulating sheath. The conductivity is determined by the number and size of the electrically conductive metal yarn or spun yarn. In the proposed method, a problem with the method of attaching insulated wires to the final garment is that a process of attaching / insulating the insulated wires in the final process is added resulting in an increase in cost, The insulated wire in the fiber is broken and the function of the insulator is not exhibited. More specifically, International Publication No. WO2004 / 107831 proposes an electrically conductive fabric in which conductive fibers and nonconductive fibers are woven together, wherein the nonconductive fibers impart elasticity to the fabric, thereby selectively imparting elasticity to the fabric. WO 2003/095729 discloses a multi-layer warp yarn for forming a plurality of cavities as a multi-layer fabric having an electronic function therein; At least one conductive yarn disposed between the warp yarns and having a portion thereof in one of the plurality of layers forming at least one cavity and at least one conductive carrier disposed in the cavity and electrically connected to the at least one electrically conductive yarn yarn; Fabrics were proposed.

On the other hand, the fabric that can be the basis of smart clothing needs the following dynamic wearability. First of all, the physical aspects of the wearer and the device are the placement, the form language, the human movement, the human perception of the intimate space, size variation, and attachment of the device.

In addition, depending on the relationship between the wearer and the close environment, the instrument's containment, weight, physical proximity, sensory interaction, thermal comfort, / Psychological satisfaction (aesthetics), long term effect (long term effect). (1998) Design for wearability, Digest of papers 2nd International symposium on wearable computer, IEEE Computer Society] [Gemperle, F., Kasabach, C., Suvoric, J., Bauer, M., Martin, R.

Technical developments have been made on the electroconductive fabric to meet the above-mentioned various standards, and a manufacturing method therefor.

The electrically conductive fabric may be used as a light emitting material having a light emitting layer in addition to a heat generating material having a heat generating layer and a conductive layer in addition to a conductive layer. There is a problem that the uniformity of the fiber surface is deteriorated due to the thickness of the conductive layer and the heat generating layer or the light emitting layer when the heat conductive layer or the light emitting layer is added to the thickness of the conductive layer itself or the electrically conductive cloth of the electrically conductive cloth. There is a possibility that the durability of the fiber is lowered and the circuit is broken, and the flexibility of the fiber is lowered.

Accordingly, there is a need for a method for producing an electrically conductive fabric or an electrically conductive fabric having a uniform surface shape even in a multi-layer structure including the conductive layer itself, the conductive layer, the heating layer, or the conductive layer and the light emitting layer.

According to an aspect of the present invention, there is provided an electrically conductive fabric comprising: a base layer on which a pattern of a predetermined engraved pattern is formed; And a conductive layer on which a conductive material is located at least a part of the pattern of the engraved pattern.

In addition, the base layer is formed by coating a primer layer on top of the base layer for surface uniformity.

The primer layer may further comprise a water-repellent layer.

Also, the engraved pattern is formed by at least one method selected from the group consisting of embossing, offset printing, and coining.

Also, the conductive layer is formed by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing, and inkjet printing.

The conductive layer may further include an insulating layer formed on the conductive layer.

The electroconductive material further comprises a heat generating layer or a light emitting layer between the conductive layer and the insulating layer in which a part or all of the conductive layer is in contact with the conductive layer.

Also, the primer layer may include at least one selected from the group consisting of a polyurethane resin, an acrylic resin, and a silicone resin.

Also, the conductive layer is formed of a conductive material or a mixture of a conductive material and a binder.

Also, the conductive material forming the conductive layer and the binder are contained in a content ratio of 90:10 to 80:20 by weight.

Also, the conductive material includes at least one selected from the group consisting of a conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel.

In addition, the present invention provides a method of fabricating an electrically conductive fabric, the method comprising: forming a pattern of a relief pattern previously designed on a base layer; And forming a conductive layer having a conductive material on at least a part of the pattern of the engraved pattern.

In addition, the base layer is formed by coating a primer layer on the base layer for surface uniformity.

Also, the primer layer may further include a water-repellent layer.

Also, the engraved pattern may be formed by at least one method selected from the group consisting of embossing, offset printing, and coining.

The conductive material for forming the conductive layer may be formed on the base layer by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing, and inkjet printing. .

Further, the method may further include forming an insulating layer on the conductive layer after the conductive layer is formed.

Further, a step of forming a heat generating layer or a light emitting layer, in which part or all of the conductive layer is in contact with the conductive layer, is formed between the step of forming the conductive layer and the step of forming the insulating layer Thereby providing a conductive fabric manufacturing method.

Also, the primer layer may include at least one component selected from the group consisting of a polyurethane resin, an acrylic resin, and a silicone resin.

Also, the conductive layer is formed of a conductive material or a mixture of a conductive material and a binder.

The conductive material forming the conductive layer and the binder are contained in a ratio of 90:10 to 80:20 by weight.

The conductive material may include at least one selected from the group consisting of a conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel. do.

As described above, the electroconductive material according to the exemplary embodiment of the present invention and the method of fabricating the same have a fundamental effect that a free pattern can be formed on the conductive layer. Therefore, it is possible to realize the electric conductivity function while ensuring various dynamic wearability.

Particularly, when the electrically conductive fabric is used as the heat-emitting fabric or the light-emitting fabric, the non-uniformity of the surface occurs due to the multilayer structure including the heat generating layer or the light emitting layer in the structure of the conventional electrically conductive fabric. The nonuniformity of the surface is improved, the durability is improved, and the functional loss due to disconnection of the circuit can be prevented. Further, the flexibility of the circuit is improved.

Further, the fabric and the manufacturing method according to the present invention are advantageous in that they can be produced by a continuous process.

Further, the fabric and the manufacturing method according to the present invention have the effect of holding an electric function capable of energizing while retaining functions such as covering property, comfortability, moisture permeability, water resistance and tensile strength.

1 is a cross-sectional view of an electrically conductive fabric with a heating or light emitting layer according to an embodiment of the invention.
Figure 2 shows a conventional electrically conductive fabric, which is a cross-sectional view of a conductive fabric with a heating layer or luminescent layer.
3 is a view illustrating a process for manufacturing an electrically conductive fabric according to an embodiment of the present invention.
4 is a view illustrating a process for manufacturing an electrically conductive fabric according to an exemplary embodiment of the present invention.
FIG. 5 is an exemplary view of a conductive layer pattern formed on a raw fabric according to an embodiment of the present invention, and a conductive layer pattern having a wide shape on a bent portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

In the following description and the accompanying drawings, substantially the same components are denoted by the same reference numerals, respectively, and redundant description will be omitted. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

 The present invention also relates to an electrically conductive fabric and a method of manufacturing the same, which will be described below with reference to Figs. However, it will be readily understood by those skilled in the art that the detailed description given herein with respect to these figures is for purposes of illustration, as the invention extends beyond these limited embodiments.

As used herein, the term " fabric " is used to include both articles made by weaving or knitting, nonwoven fabrics, and fibrous webs.

1 is a sectional view of a fabric according to a preferred embodiment of the present invention.

The electrically conductive fabric according to an embodiment of the present invention may be composed of a base layer 100, a conductive layer 200, a selective heating layer or a light emitting layer 300, and an insulating layer 400.

 In the fabric according to a preferred embodiment of the present invention, the substrate layer 100 can be any type of fabric, knitted, nonwoven or fibrous web. And can be applied without limitation to the material and the forming method. For example, synthetic fibers such as polyester, polyamide, and polyurethane, cellulose regenerated fibers such as rayon / acetate, and natural fibers such as cotton / wool /.

The surface of the base layer 100 is microscopically very uneven and extremely fine pores are present due to the gap between the fibers. Accordingly, it is necessary to ensure uniformity of the surface, to form a conductive layer having a uniform thickness to be described later, and to prevent the material forming the conductive layer from penetrating into the back surface of the base layer 100, A primer layer (not shown) may be formed. However, it is understood that the primer layer may be selectively formed on the fabric and may be excluded depending on the characteristics of the fabric.

The primer layer (not shown) may be an electrically conductive fabric comprising at least one member selected from the group consisting of a polyurethane resin, an acrylic resin, and a silicone resin. Further, the primer layer (not shown) may be formed of a single layer made of the above material, and a water-repellent layer (not shown) may be further formed. The water-repellent layer may be formed by a general water-repellent process, and may be made of fluorine or silicon material in a non-limiting example.

The primer layer may be selectively formed on the base layer, and the water-repellent layer may be optionally formed on the base layer. Hereinafter, it is referred to as a substrate layer including both of the presence / absence of the primer layer and the presence / absence of the water repellent layer.

When the primer layer and the water repellent layer are coated on the base layer, the base layer including the primer layer and the water repellent layer may be intaglio.

The intaglioing method includes embossing, coining, and offset printing, which are types of stamping. Stamping is a method in which fibers are sandwiched between upper and lower molds with irregularities, and a shape of irregularities is given to the flat surface of the material by shock pressure, and there are embossing and coining. Coining is a process in which a material is placed between a set of dies attached to a sculpted template, and a piece is formed on the surface by applying pressure. Embossing is a method of forming various shapes on a thin metal with a pair of upper and lower dies whose ruggedness is opposite to each other. Offset printing is a method in which a normal pattern transfer is directly transferred from a printing face, whereas offset printing is a method in which a pattern is once transferred to a rubber blanket and then transferred to a fiber.

The conductive layer 200 is formed of a conductive material at a portion formed by the intaglio method. The conductive layer may be formed by screen printing, reverse offset printing, gravure printing, and inkjet printing.

The gravure printing is widely used in the production of electrodes. The printing plate of gravure printing is a method of chrome plating a cylinder of metal, patterning through various etching methods, and filling the conductive layer by using the printing plate. The gravure printing method is capable of printing without changing the pattern even when mass-produced.

The screen printing is a technique of using a screen type. It is possible to obtain a sufficient and precise pattern even in a smaller amount than the conventional patterning technique and is widely used. The reverse offset printing is a method of coating a metal cylinder with an electrode material, rotating the cylinder on a cliche to transfer the pattern onto the cylinder, and then transferring the pattern onto the fiber surface. The inkjet printing is a method in which fine particles are sprayed from a nozzle to apply a pattern.

The conductive layer 200 may be formed of a conductive material or a mixture of a conductive material and a binder. The conductive material may include at least one component selected from the group consisting of a conductive polymer, carbon, silver, gold platinum, palladium, copper, aluminum, tin, iron and nickel. Specifically, the conductive filler is dispersed in a vehicle, and the cured film after printing is conductive. Typically, it is used for LCD electrode printing, touch screen printing, electrification pattern printing on a circuit board, It is used for electromagnetic shielding. Examples of the conductive filler include conductive metals (such as silver, gold, platinum, palladium, copper, and nickel), of which silver is preferred. Meanwhile, the conductive polymer may include one or more components selected from the group consisting of polyaniline, polypyrrole, and polythiophene.

The thickness of the conductive layer 200 is preferably 2 to 500 μm. If the thickness is less than the above range, it is difficult to ensure the uniformity of the conductive layer thickness. If the thickness exceeds the above range, the resistance value increases and power consumption increases there is a problem. More preferably 10 to 20 占 퐉. The width of the conductive layer 200 is preferably about 10 to 20 mm. As the width of the conductive layer increases, the resistance value decreases and the current can be stably energized. However, if the width of the conductive layer increases without limitation, There is a problem with the covering property.

 Meanwhile, it is preferable that the resistance value of the fabric according to the present invention is maintained between 0.5 and 4? Before and after the washing. However, it is difficult to realistically realize the resistance value below the above range. On the other hand, the binder may be one or more selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a melamine resin and an epoxy resin, preferably a water-dispersible polyurethane resin. A heating layer or a light emitting layer 300 may be formed on the conductive layer 200. The heat generating layer or the light emitting layer 300 may be formed by applying a conductive material or a mixture of a conductive material and a binder in a predetermined form, and the conductive material may be a polymer such as polyaniline, polypyrrole, polythiophene, Conductive carbon black may be mixed. And may also include one or more components selected from the group consisting of carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel.

It is preferable that the conductive material of the conductive layer 200 and the conductive material of the light emitting layer and the heat generating layer 300 and the binder are mixed at a ratio of 90:10 to 80:20 (by weight). When the binder exceeds the above range, There is a problem that the function is deteriorated, and when it is less than the above range, the adhesive strength is lowered.

The insulating layer 400 may be formed on the conductive layer, the heat generating layer, and the light emitting layer. The insulating layer 400 may be formed by coating, printing or laminating at least one selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a polyester resin, a PVC resin, and a polytetrafluoroethylene (PTFE) (400) can be formed. The insulating layer 400 prevents damages such as cracks in the conductive layer, imparts flexibility to the fabric, and can perform a moisture-proof waterproof or waterproof function.

Figure 2 shows one embodiment of a conventional conductive fabric. The fabric includes a base layer 100, a conductive layer 200, a selective heating layer or a light emitting layer 300, and an insulating layer 400.

Compared with the case of Fig. 2, the case of Fig. 1 is more excellent in surface uniformity, further improves the durability, prevents the case of disconnection of the circuit, and secures circuit flexibility.

Hereinafter, a method of manufacturing an electrically conductive fabric according to a preferred embodiment of the present invention will be described. 3 and 4 are process diagrams illustrating a method of fabricating conductive fabric according to an embodiment of the present invention. The steps of the dotted lines (S500, S502, S504, S510) shown in Figs. 3 and 4 may be an optional step.

When the fabric for forming the base layer 100 is prepared as described above, the fabric of the base layer is supplied between the two compression rollers in order to compensate for the disadvantages of the surface irregularities in the case of the fabric or the knitted fabric by the car rendering step (S502) do. Thereby, the surface of the base layer 100 becomes smooth, the voids of the base layer 100 can be canceled, and the bending resistance can be compensated. The car rendering step is a process that can be selectively performed according to the characteristics of the fabric.

The raw fabric having the base layer that has been subjected to the car rendering step or not car-rendered can be formed into a multilayer structure of the base layer to more positively control the surface voids and to form the primer layer for the thickness uniformity of the conductive layer 200 (S504). The primer layer may be formed by a knife roller method, an overcoat coating, a floating knife coating, or a knife overcoating, laminating, printing or lubrication coating. (S504) As described above, the primer layer may also be selectively formed .

On the other hand, in forming the primer layer, the water repellent layer can be further formed as described above. The water-repellent layer may be formed before or after the car rendering step (S500). In the process shown in FIG. 3, a step of forming a water-repellent layer before the car-rendering step is illustrated, and a process shown in FIG. 4 illustrates a step of forming a water-repellent layer and / or a primer layer after the car- It is not. In step S506, a pattern having a primer layer formed thereon or a substrate layer not coated with a primer layer is drawn on the upper side of the base layer,

 The intaglioing method is based on one or more methods selected from the group consisting of embossing, coining, and offset printing, which is a kind of stamping as described above.

Next, in the conductive layer formation step (S508), a conductive layer is formed of a conductive material at a portion formed by the intaglio method. The conductive layer may be filled by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing, and inkjet printing as described above.

In the printing method, it is possible to design the circuit on the fabric according to the designed form, without being limited by the position of the electronic device to be used and the like. In this regard, the fabric according to the present invention may be referred to as a flexible printed fabric circuit board (FPFCB).

The conductive layer 200 preferably has a thickness of about 2 to 500 μm and a width of about 10 to 20 mm. The resistance value of the conductive layer 200 is preferably 0.5 to 4 Ω before and after the washing. In addition, the carbon may be 1 to 30 wt%, and the silver may be 1 to 70 wt%. The binder that can be used for the heat generating layer, the light emitting layer, and the conductive layer may include one or more components selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a melamine resin and an epoxy resin. (S508)

5 shows an example in which a conductive layer is formed on a raw fabric according to an embodiment of the present invention. In the circuit pattern of the conductive layer, the bent portion 230 is formed in a form having a width wider than that of the linear circuit 210 . 5, the shape of the circular shape is illustrated in FIG. 5, but the shape is not limited thereto. It is needless to say that other shapes such as a circular shape, an elliptical shape, and the like may be adopted as long as they are wider than the width of the linear circuit.

It is more preferable that the bent portion is formed in a relatively wide shape. The reason can be supported by the following expression.

,

,

: 전력, R : 저항,

: 비저항, L : 도선의 길이, S : 단면적

: Power, R: resistance,

: Resistivity, L: length of conductor, S: sectional area

As the area is increased according to the above formula, the resistance becomes smaller, and the flow of current becomes larger together therewith. Therefore, the bent portion 230 is basically formed in the wide shape 210, which is a factor for increasing the amount of current.

If the bent portion 210 of the lead wire has a rectangular shape or an angled shape, a sudden change in current flow may cause a surge phenomenon and cause an exothermic reaction.

The surge phenomenon refers to a transient waveform of electrical current, voltage, or electric power, which is transmitted along a wire or an electric circuit and has a characteristic of rapidly increasing and gradually decreasing in a short time. The day of lightning is the main cause of electricity breakdowns, telephone disruptions and the destruction of sensitive semiconductors. Sudden overvoltage on the power line In particular, if the surge is strong or long, it may cause insulation breakdown or obstruction of electronic equipment. Therefore, a surge protector or surge suppressor is installed between the power terminal and the computer terminal to suppress or minimize current change.

Therefore, by changing the area of the bent portion 210 according to an embodiment of the present invention, it is possible to minimize the occurrence of the surge phenomenon by lowering the lowering value, and to smoothly flow even when the amount of current increases.

After the conductive layer 200 is formed, a light emitting layer or a heat generating layer 300 may be formed on the light emitting layer or the heat generating layer 300. (S510) The light emitting layer or the heat generating layer is electrically connected to a conductive layer 200, .

The insulating layer 400 formed in the insulating layer forming step S512 may be formed of a solvent type polyurethane resin, a water dispersible polyurethane resin, an oil soluble acrylic resin, a water soluble acrylic resin, a silicone resin, a polyester resin, a polytetrafluoroethylene ) -Based resin by directly coating, printing, or laminating. In the case of the coating method, the dry method is preferable, and in the case of the lining method, the hot-melt type dot method or the gravure method is preferable. (S512) In the case of the coating method in the insulating layer forming step, , Which may affect the durability thereof.

The insulating layer may be formed on both sides as well as on the end face of the fabric. Therefore, considering that the laundry is required to be washed several times, the selection of a coating composition capable of exhibiting an insulation phenomenon over a long period of time, that is, an excellent washing resistance can be exhibited is an important factor.

On the other hand, after the car-rendering step, the fabric constituting the base layer 100 may be subjected to moisture-permeable waterproofing or waterproofing. The pores formed by the breathable waterproof or waterproof treatment not only cancel the pores of the fabric constituting the base layer but also complement the insulation, washing resistance and flex resistance. It is preferable to apply a resin compatible with the conductive material to the material used in the moisture-permeable waterproofing process (moisture-proof / water-proofing step, not shown)

In the case of using the conductive fabric as the heat-generating fabric or the light-emitting fabric, the non-uniformity of the surface occurs due to the multilayer structure including the heating layer or the light-emitting layer in the structure of the conductive fabric. The durability is improved, and the functional loss due to disconnection of the circuit can be prevented. Further, the flexibility of the circuit is improved.

Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is intended to more specifically illustrate the present invention, and the scope of the present invention is not limited to these embodiments.

Example  One

A primer layer is coated with a solvent type polyurethane resin on a polyester plain weave fabric, and then the primer layer is formed on the base layer by an embossing method. Then, a conductive layer is formed using a silver paste component by a screen printing method, A heating layer of polypyrrole-based resin is formed on the top of the layer by printing once. At this time, a urethane crosslinking agent was used as a binder. Further, the shape of the bending point of the circuit was formed into a circularly-designed heat generating pattern. And then coated with a water dispersible polyurethane composition to form an insulating layer in a cross section.

Example  2

The same procedure as in Example 1 was carried out except that an insulating layer was formed in a cross section using solvent-dispersed silicone as a coating composition for an insulating layer.

Comparative Example  One

Forming a primer layer of a solvent type polyurethane resin on a polyester plain weave fabric, forming a primer layer on the primer layer with a silver paste component first, and forming a heating layer of polypyrrole resin on the conductive layer by printing And is formed by printing once. At this time, a urethane crosslinking agent was used as a binder. Further, the shape of the bending point of the circuit was formed into a circularly-designed heat generating pattern. And then coated with a water dispersible polyurethane composition to form an insulating layer in a cross section.

Comparative Example  2

 The same procedure as in Comparative Example 1 was carried out except that an insulating layer was formed in a cross section using solvent-dispersed silicone as a coating composition for the insulating layer

NO.
division Conductive layer Insulating layer Conductive layer formation Coating composition Formation after engraving Existing method Solvent-dispersed type
Polyurethane Solvent-dispersed type
silicon One Example 1 0 0 2 Example 2 0 0 5 Comparative Example 1 0 0 6 Comparative Example 2 0 0

*Test Methods

1. Flexibility: KSK 0855: 2004, Method C (Crumple / Flex method)

After sewing a rectangular coated fabric in a cylindrical shape, a cylindrical test piece is made by grasping both ends of the two opposing discs. Thereafter, one disk was twisted by 90 degrees while the other disk was reciprocated in the axial direction to bend the test piece. Twisting and compressive motion were continued 1,000 times, 5,000 times, 10,000 times, Respectively.

In order to investigate the durability of the heating layer and the conductive layer, it was found that when the conductive layer was formed by engraving the base layer to form a conductive layer, the conductive layer was formed directly on the base layer and the resistance difference after the bending resistance test saw.

NO. division 1,000 times 5,000 times 10,000 times resistance
Rate of change resistance
Rate of change resistance
Rate of change unit % % % One Example 1 46.1 61.2 60.1 2 Example 2 73.5 52.9 69.8 3 Comparative Example 1 172.3 146.2 292.7 4 Comparative Example 2 192.8 176.3 138.6

As a result of the above Table 2, when the conductive layer was formed after intaglioing the substrate layer, it was shown that the resistance change was relatively stable compared to the case where the conductive layer was formed on the base layer in the conventional manner. The more stable the resistance change is, the better the bending resistance is. Therefore, the bending resistance when the conductive layer is formed after intaglioing the substrate layer is further improved.

2. Washability

NO Detergent dummy Laundry condition Drying conditions 1 time Without include Wool Course High temperature drying Episode 2 Without Without Wool Course High temperature drying 3rd time Without Without Wool Course Except dehydration, drying oven 4 times Neutral detergent Without Wool Course Except dehydration, drying oven

The resistance of each of the samples prepared in Example 1 and Comparative Example 1 was measured for each washing cycle under the above conditions (see Table 3).

Resistance change rate (%) = {(resistance after washing - resistance before washing) / resistance after washing} X100

division
Growth rate after one wash (%) Growth rate after 2 washes (%) Growth rate after 3 washing (%) Growth rate after 4 washing (%) Example 1 39.6 35.7 29.8 4.9 Comparative Example 1 89.6 108.3 106.8 120.1

As shown in Table 4, although the resistance increases as the number of times of washing increases, the resistance change rate decreases as compared with before washing. Therefore, even if the number of times of washing is increased, resistance increase is low and washing durability is confirmed. Particularly, the above experimental result means that when the conductive layer is formed on the base layer by a conventional method, the conductive layer is formed by embossing the base layer to have a durability.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: substrate layer
200: Conductive layer
300: exothermic layer or light emitting layer
400: insulating layer

Claims (22)

In electrically conductive fabrics,
A substrate layer on which a pattern of a pre-designed engraved pattern is formed; A conductive layer in which a conductive material is disposed on at least a part of the pattern of the engraved pattern; An insulating layer formed on the conductive layer; And a heat generating layer or a light emitting layer which is located between the conductive layer and the insulating layer and at least part of which is in contact with the conductive layer,
Wherein the engraved pattern is formed by an offset printing or coining method,
Wherein the conductive layer is inserted in the pattern of the engraved area so that the surface on which the conductive layer is inserted and the surface of the base layer are located on the same plane,
Wherein the light emitting layer is positioned above the base layer in which the conductive layer is inserted, and is electrically contacted to the same plane of the surface on which the conductive layer is inserted and the surface of the base layer. The method of claim 1,
Wherein the primer layer is formed by coating a primer layer on top of the substrate layer for surface uniformity. The method according to claim 2, wherein the primer layer
A water-repellent layer is further formed. delete 2. The semiconductor device according to claim 1, wherein the conductive layer
Wherein the electroconductive fabric is formed by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing, and inkjet printing. delete delete The method according to claim 2, wherein the primer layer
Wherein the electrically conductive fabric comprises at least one member selected from the group consisting of a polyurethane resin, an acrylic resin and a silicone resin. 2. The semiconductor device according to claim 1, wherein the conductive layer
Conductive material or a mixture of a conductive material and a binder. The method of claim 9, wherein the conductive material forming the conductive layer and the binder
Wherein the electrically conductive fabric is contained in a weight ratio of 90:10 to 80:20 by weight. 10. The method of claim 9, wherein the conductive material
Wherein the electrically conductive fabric comprises at least one component selected from the group consisting of a conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel. In an electrically conductive fabric manufacturing method,
Forming a pattern of a predetermined engraved pattern on the base layer; Forming a conductive layer in which a conductive material is located on at least a part of the pattern of the engraved pattern; Forming a heat generating layer or a light emitting layer which is located between the conductive layer and the insulating layer and at least part of which is in contact with the conductive layer; And forming an insulating layer on the conductive layer,
Wherein the engraved pattern is formed by an offset printing or coining method,
Wherein the conductive layer is inserted in the pattern of the engraved area so that the surface on which the conductive layer is inserted and the surface of the base layer are located on the same plane,
Wherein the light emitting layer is positioned above the base layer in which the conductive layer is inserted, and is electrically contacted to a plane where the conductive layer is inserted and a surface of the base layer. 13. The method of claim 12,
Wherein the primer layer is formed by coating a primer layer on the top of the base layer for surface uniformity. 14. The method of claim 13, wherein the primer layer
Wherein the water-repellent layer is further formed. delete 13. The method of claim 12, wherein the conductive material forming the conductive layer
Wherein the electroconductive fabric is formed on the base layer by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing, and inkjet printing. delete delete 14. The method of claim 13, wherein the primer layer
A polyurethane resin, an acrylic resin, and a silicone resin. 2. The method of manufacturing an electrically conductive fabric according to claim 1, 13. The device according to claim 12, wherein the conductive layer
Conductive material or a mixture of a conductive material and a binder. 21. The method of claim 20, wherein the conductive material forming the conductive layer and the binder are contained in a weight ratio of 90:10 to 80:20 by weight. 21. The method of claim 20, wherein the conductive material comprises
Wherein the electrically conductive polymer comprises at least one member selected from the group consisting of a conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel.

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