KR20140044429A - Flexible printed electrically conductive fabric and method for fabricating the same - Google Patents

Abstract

The present invention relates to conductive fabric and a manufacturing method thereof, and more specifically, to conductive fabric and a manufacturing method thereof, wherein the conductive fabric forms pre-designed electric patterns by engraving the top of a primer layer or a base layer without the primer layer and filling the engraved surface with a conductive material. In particular, fabric of a multi-layered structure with a heat emitting layer and a light emitting layer has poor surface uniformity, thereby reducing durability, causing a short circuit, and lowering flexibility of fabric. Therefore, the conductive fabric improves durability and flexibility and prevents a short circuit by forming a conductive layer through engraving and improving surface uniformity.

Description

Flexible printed electrically conductive fabric and method for fabricating the same

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

Smart Wear is a new product designed to use digital functions anytime and anywhere by applying new signal transmission fiber technology and embedding various digital devices in textile fashion products. In other words, it is a new type of clothing that is equipped with digital functions necessary for maintaining the properties of textiles or clothing in textile materials and clothing. For this reason, it must transmit digital signals while showing the feel and properties similar to that of ordinary fabrics. Therefore, a new concept of clothing that combines the functionality of the materials (Hifunction materials properties) that the fibers or clothing itself senses the external stimulus and responds to itself and the digitalized properties that the clothing and the fabric itself do not have.

Smart Wear, which has been developed for military use since the mid-1990s, is currently being actively developed in clothing and medical fields. In particular, smart materials using printing electronic technology may be used in various military textile products of a wearable computer. When printed electronic technology is used as an interconnection method for connecting various parts and conductive textile fabrics having the characteristics of clothing and electrical properties in smart materials, the application value is high because fabric-based electronic circuit design is possible. For example, if printed electronics are applied to military uniforms, there is the possibility of weight reduction and volume reduction, thereby enabling the development of military uniforms that are integrated with the healing function and communication function. In modern warfare-oriented warfare, soldiers must carry more than 45kg of equipment when fully armed, so the development of this technology is urgently required. In order to manufacture such smart clothing, a technology that integrates various elements for a body area network (BAN) is required.

Various methods have been proposed for this purpose, for example, to form a fabric from an insulated wire, a metal yarn imparted with electrical conductivity, or an insulating spun yarn. In this method, the conductivity is determined by the number and size of the electrically conductive metal yarns or the spun yarns. In the proposed method, the problem of attaching the insulated wire to the final garment is to add the step of attaching / insulating the insulated wire in the final process, resulting in the increase of the cost and also the continuous use of the wearer. Due to this, the insulated wire in the fiber is broken so that it does not exhibit its original function. More specifically, in WO2004 / 107831, an electrically conductive fabric is proposed in which conductive fibers and non-conductive fibers are woven with each other, but the non-conductive fibers impart elasticity to the fabric and selectively impart elasticity to the fabric. International Publication No. WO2003 / 095729 also discloses a multi-layer weft yarn for forming one or more cavities as a multilayer fabric having an electronic function therein; A multilayer comprising at least one conductive spun yarn having a portion thereof in one of a plurality of layers disposed between the inclined yarns and forming at least one cavity and at least one circuit carrier disposed in the cavity and electrically connected to at least one electrically conductive spun yarn Fabrics have been proposed.

On the other hand, the fabric that can be the basis of smart clothing may require the following dynamic wearability. First, as a reference to the physical aspects of the wearer and the device, the placement, the form language, the human movement, the wearer's human perception of intimate space, size variation), the attachment of the device (attachment).

Depending on the relationship between the wearer and the environment, the device's composition, its weight, physical accessibility, sensory interaction, thermal comfort, and aesthetics Psychological aesthetics, long term effects, etc. Gemperle, F., Kasabach, C., Suvoric, J., Bauer, M., Martin, R. (1998) Design for wearability, Digest of papers 2nd International Symposium of wearable computer, IEEE computer Society

The development of an electrically conductive fabric to meet the various standards, and a manufacturing method thereof.

The electrically conductive fabric may be utilized as a heat generating fabric having a heat generating layer in addition to the conductive layer, and a light emitting fabric having a light emitting layer in addition to the conductive layer. When the heating layer or the light emitting layer is added to the thickness of the conductive layer itself or the electrically conductive fabric of the electrically conductive fabric, there is a problem that the uniformity of the surface of the fiber is inferior due to the thickness of the conductive layer and the heating layer or the light emitting layer. In addition, there is a problem that the durability of the fiber and the possibility of breaking the circuit is increased, the flexibility of the fiber is inferior.

Therefore, there is a need for a method of manufacturing an electrically conductive fabric or an electrically conductive fabric having a uniform surface shape even in a layer structure of the conductive layer itself or in a multilayer structure having a conductive layer and a heating layer or a conductive layer and a light emitting layer.

In order to solve the above problems, the present invention is an electrically conductive fabric, the substrate layer formed with a pre-designed intaglio pattern; And a conductive layer having a conductive material positioned on at least a portion of the intaglio pattern.

In addition, the base layer provides an electrically conductive fabric, characterized in that formed by coating a primer layer on top of the base layer for surface uniformity.

In addition, the primer layer provides an electrically conductive fabric, characterized in that the water-repellent layer is further formed.

In addition, the intaglio pattern provides an electrically conductive fabric, characterized in that formed by one or more methods selected from the group consisting of embossing, offset printing and coining.

In addition, the conductive layer provides an electrically conductive fabric, characterized in that formed by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing and inkjet printing.

In addition, the present invention provides an electrically conductive fabric further comprising an insulating layer formed on the conductive layer.

The present invention also provides an electrically conductive fabric further comprising a heating layer or a light emitting layer in which part or all of the conductive layer contacts the conductive layer between the conductive layer and the insulating layer.

In addition, the primer layer provides an electrically conductive fabric, characterized in that it comprises at least one component selected from the group consisting of polyurethane resin, acrylic resin and silicone resin.

In addition, the conductive layer provides an electrically conductive fabric, characterized in that formed of a conductive material or a mixture of a conductive material and a binder.

In addition, the conductive material and the binder forming the conductive layer provides an electrically conductive fabric, characterized in that included in the content ratio of 90:10 to 80:20 by weight.

In addition, the conductive material provides an electrically conductive fabric, characterized in that it 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 addition, the electrically conductive fabric manufacturing method comprising the steps of: forming a pre-designed intaglio pattern on top of the base layer; And forming a conductive layer in which a conductive material is located on at least a portion of the intaglio pattern.

In addition, the substrate layer provides an electrically conductive fabric manufacturing method, characterized in that formed by coating a primer layer on top of the substrate layer for surface uniformity.

In addition, the primer layer provides an electrically conductive fabric manufacturing method, characterized in that the water-repellent layer is further formed.

In addition, the intaglio pattern provides an electrically conductive fabric manufacturing method, characterized in that formed by at least one method selected from the group consisting of embossing, offset printing and coining.

In addition, the conductive material in the step of forming the conductive layer is electrically conductive fabric manufacturing method characterized in that 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. To provide.

In addition, after the step of forming the conductive layer provides an electrically conductive fabric manufacturing method characterized in that it further comprises the step of forming an insulating layer on top of the conductive layer.

In addition, between the step of forming the conductive layer and the step of forming the insulating layer, further comprising the step of forming a heating layer or a light emitting layer in which part or all of the conductive layer is in contact with the conductive layer Provided is a conductive fabric manufacturing method.

In addition, the primer layer provides an electrically conductive fabric manufacturing method characterized in that it comprises at least one component selected from the group consisting of polyurethane resin, acrylic resin and silicone resin.

In addition, the conductive layer provides a method for manufacturing an electrically conductive fabric, characterized in that formed of a conductive material or a mixture of a conductive material and a binder.

In addition, the conductive material and the binder forming the conductive layer provides an electrically conductive fabric manufacturing method, characterized in that included in the content ratio of 90:10 to 80:20 by weight.

In addition, the conductive material provides a method for manufacturing an electrically conductive fabric, characterized in that it 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. do.

As described above, the electrically conductive fabric and the method of manufacturing the same according to the embodiment of the present invention have the basic effect that free pattern formation is possible on the conductive layer. Therefore, it is possible to implement the electrically conductive function while ensuring a variety of dynamic wearability.

In particular, in using the electrically conductive fabric as a heating fabric or a light emitting fabric, non-uniformity of the surface caused by a multi-layer structure having a heating layer or a light emitting layer in the structure of the existing electrically conductive fabric occurs, but in one embodiment of the present invention According to this, the nonuniformity of the surface is improved, so that the durability performance can be improved and the functional loss due to disconnection of the circuit can be prevented. In addition, the flexibility of the circuit is improved.

In addition, the fabric and manufacturing method according to the present invention has the advantage that can be produced by a continuous process.

In addition, the fabric and manufacturing method according to the present invention has the effect of having an electrical function capable of energizing, while retaining the function as a fabric, such as coatability, comfort, moisture-permeable waterproof, tensile strength.

1 is a cross-sectional view of an electrically conductive fabric having a heating layer or a light emitting layer according to an embodiment of the present invention.
2 illustrates a conventional electrically conductive fabric and is a sectional view of a conductive fabric having a heating layer or a light emitting layer.
Figure 3 is a manufacturing process of the electrically conductive fabric according to an embodiment of the present invention.
Figure 4 is a manufacturing process of the electrically conductive fabric according to an embodiment of the present invention.
5 is an exemplary view of a conductive layer pattern having a wide shape in a free conductive layer pattern and a bent portion in the fabric according to an embodiment of the present invention.

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 is described below with reference to FIGS. 1 to 5. 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 all articles, nonwoven fabrics and fibrous webs produced by weaving or knitting.

Figure 1 shows a cross-sectional view of the fabric according to an embodiment of the present invention.

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

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

The substrate layer 100 is microscopically very uneven in its surface, and there are extremely many fine pores due to the gap between the fibers. Therefore, to ensure the uniformity of the surface and the conductive layer to be described later to be formed in a uniform thickness, the upper portion of the base layer 100 in order to prevent the material forming the conductive layer from penetrating the back surface of the base layer 100 A primer layer (not shown) may be formed thereon. However, the primer layer may be selectively formed on the fabric and may be excluded according to the characteristics of the fabric.

The primer layer (not shown) may be an electrically conductive fabric comprising one or more components selected from the group consisting of polyurethane resins, acrylic resins, and silicone resins. In addition, 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 performed by a general water repellent process, and may be made of a fluorine or silicon material as a non-limiting example.

The primer layer may be selectively formed on the substrate layer, and the water repellent layer may also be optionally formed on the substrate layer. Hereinafter, it will be described as a base material layer including all with or without a primer layer and with or without a water repellent layer.

The base layer 100 is engraved according to a predesigned electrical pattern. 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 engraved.

Engraving methods include embossing, coining, and offset printing, which are a type of stamping. Stamping is a processing method in which fibers are sandwiched between the upper and lower molds with irregularities, and the irregularities are formed in the plane of the material by shocking presses, and there are embossing and coining. Coining is a process in which a piece of die is placed between a set of dies attached to a sculpted template and pressed to form a sculpture on the surface. Embossing is a pair of upper and lower dies in which unevenness is opposite to each other. Offset printing is a method in which normal pattern transfer is directly transferred from a plate surface, while offset printing is a method of transferring a pattern to a rubber blanket once and then to a fiber.

The conductive layer 200 is formed of a conductive material in a portion formed by the engravation 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 electrode manufacturing, the printing plate of the gravure printing is a method of filling the conductive layer using the printing plate after the pattern is etched by chromium plating on a metal cylinder, the etching of various methods. The gravure printing method is capable of printing without changing the pattern even in mass production.

The screen printing is a kind of technique using a screen type. Less amount than the conventional papermaking technique is sufficient and can be obtained a sophisticated pattern is used a lot. In addition, the reverse offset printing is a method of coating a metal cylinder with an electrode material, rotating the cylinder on a cliché, transferring the pattern to the cylinder, and then transferring the pattern to the surface of the fiber. The inkjet printing is a method of forming a pattern by spraying the fine particles in the nozzle.

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 one or more components 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 refers to a material in which the cured film after printing exhibits conductivity. Typically, an LCD electrode printing, a touch screen printing, a conductive pattern printing of a circuit board, a contact portion and a pattern portion printing of a thin film switch plate, It is used for electromagnetic shields. Non-limiting examples of the conductive fillers include conductive metals (silver, gold, platinum, palladium, copper, nickel, etc.), of which silver is preferable. 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㎛, if less than the range has a problem that it is difficult to ensure the uniformity of the thickness of the conductive layer, if the range exceeds the resistance value is increased power consumption is increased there is a problem. More preferably, it may be 10 to 20 ㎛. In addition, the width of the conductive layer 200 is preferably about 10 to 20mm, the resistance value decreases as the width of the conductive layer increases, so that the current can be stably energized. In addition, there is a problem in coating properties.

 Meanwhile, the resistance value of the fabric according to the present invention is preferably maintained at 0.5 to 4 Ω before and after washing, and it is difficult to realize the above range, and there is a problem in that the current flows stably when exceeding the range. Meanwhile, 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, and preferably, may be a water dispersible polyurethane resin. The heating layer or the light emitting layer 300 may be formed on the conductive layer 200. The heating 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 pre-designed form, and the conductive material may be polyaniline, polypyrrole, polythiophene, or the like as a polymer. Conductive carbon black may be mixed. It may also include one or more components selected from the group consisting of carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel.

The conductive material and the binder of the conductive layer 200, the light emitting layer, and the heating layer 300 are preferably mixed in a ratio of 90:10 to 80:20 (by weight). There is a problem that the function is lowered and there is a disadvantage that the adhesive strength is lowered if it is less than the above range.

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

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

Compared to the case of FIG. 2, the case of FIG. 1 is more excellent in surface uniformity, and further, durability can be improved, and cases such as disconnection of a circuit can be prevented, and circuit flexibility can be secured.

Hereinafter will be described a method of manufacturing an electrically conductive fabric according to an embodiment of the present invention. 3 and 4 is a process chart showing a method of manufacturing a conductive fabric according to an embodiment of the present invention. Steps S500, S502, S504, and S510 of the dotted lines shown in FIGS. 3 and 4 may be optional steps.

As described above, when the fabric forming the base layer 100 is prepared, the fabric of the base layer is supplied between two pressing rollers to compensate for the disadvantages of surface irregularities in the case of the fabric or knitted fabric by the calendering step (S502). do. As a result, the surface of the base layer 100 may be smoothed, the voids of the base layer 100 may be offset, and the bending resistance may be compensated for. The calendering step is a process that can be selectively performed according to the characteristics of the fabric.

The fabric having the calendering step or the non-calendering base layer may have a multilayer structure of the base layer to more actively control the surface voids and form a primer layer for thickness uniformity of the conductive layer 200. There is (S504). The primer layer may be formed by knife roller method, over roll coating, floating knife coating, or knife over coating, laminating, printing or gravure coating. (S504) As described above, the primer layer may be selectively formed. .

Meanwhile, in forming the primer layer, the water repellent layer may be further formed as described above. The water repellent layer may be performed before or after the calendering step (S500). The process diagram shown in FIG. 3 illustrates a step of forming a water repellent layer before the calendering step, and the process diagram shown in FIG. 4 illustrates a step of forming a water repellent layer and / or a primer layer after the calendering step, but is not limited thereto. It is not. With respect to the fabric having the base layer formed with the primer layer or not coated with the primer layer, a pre-designed pattern is drawn on the top of the fabric according to the pre-designed shape on the top thereof (S506).

 The engraving method is based on at least one method 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 forming step (S508), a conductive layer is formed of a conductive material on a portion formed by the engravation method. The method of filling the conductive layer may be performed by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing, and inkjet printing as described above.

According to the printing method, the circuit can be designed on the fabric according to the designed form without being limited to the attachment position of the electronic device to be used. 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 has a thickness of 2 to 500㎛, 10 to 20mm in width, the resistance value of the fabric is preferably maintained before and after washing 0.5 ~ 4Ω. In addition, the electrode may be 1 to 30% by weight of carbon, silver may be 1 to 70% by weight. The binder that may 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 polyurethane resins, acrylic resins, silicone resins, melamine resins, and epoxy resins. (S508)

FIG. 5 illustrates an example in which a conductive layer is formed on a fabric according to an embodiment of the present invention, in which a bending portion 230 in a circuit pattern of the conductive layer is formed in a relatively wider shape than the linear circuit 210. It is shown. In FIG. 5, the circular shape is illustrated as the above shape, but the shape is not limited thereto. If the shape is wider than the width of the linear circuit, other shapes such as circular and elliptical may be adopted.

It is more preferable to form the bent portion in a relatively wide shape, which may be supported by the following equation.

,

,

: 전력, R : 저항,

: 비저항, L : 도선의 길이, S : 단면적

: Power, R: resistance,

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

As the area increases according to the above formula, the resistance decreases, and the flow of current increases with it. Therefore, since the bending portion 230 is formed in a wide shape 210, it may be a factor to increase the amount of current.

If the bending portion 210 of the conductive wire is formed at right angles or angles, a surge may occur due to a sudden change in current flow, thereby causing an exothermic reaction.

The surge phenomenon refers to a transient waveform of electric current, voltage, or power that is transmitted along a wire or an electric circuit and has a characteristic of rapidly increasing and decreasing gradually in a short time. Lightning days are the main causes of power cuts, phone calls, and the destruction of sensitive semiconductors. Sudden overvoltages on power lines, especially strong or long surges, can disrupt insulation or interfere with electronic equipment, so surge protectors or surge suppressors are placed between the power and computer terminals to suppress or minimize current changes.

Therefore, in one embodiment of the present invention, by changing the area of the bent portion 210, the reverberation value is lowered to minimize the occurrence of the surge phenomenon and to smoothly flow even if the current amount is increased.

After the conductive layer 200 is formed, the light emitting layer or the heating layer 300 may be formed on the upper portion thereof. (S510) The light emitting layer or the heating layer may be electrically or partially contacted with one side of the conductive layer 200. It is.

The insulating layer 400 formed in the insulating layer forming step (S512) is a solvent type polyurethane resin, water dispersible polyurethane resin, oil-soluble acrylic resin, water soluble acrylic resin, silicone resin, polyester resin, polytetrafluoroethylene (PTFE It may be formed by direct coating, printing, laminating a) -based resin. In the case of the coating method, a dry method is preferable, and in the case of the laminating method, a hot melt type dot or gravure method is preferable. (S512) In the insulating layer forming step, the resistance value varies depending on the coating composition. This may affect durability.

In addition, the insulating layer may be formed on both sides of the fabric as well as the cross section. Therefore, in view of the fact that several washings are required due to the nature of the fabric, the selection of a coating composition to enable insulation to occur in the long term, that is, to exhibit excellent washing resistance, is an important factor.

On the other hand, after the calendering step, it is possible to selectively process the waterproof waterproof or waterproof processing to the fabric constituting the base layer 100. The pores formed by the moisture-permeable waterproof or waterproof treatment not only cancel the pores of the fabric constituting the base layer, but also serve to compensate for insulation, washing resistance, and bending resistance. It is preferable to apply a resin which is compatible with the conductive material as the material used for the moisture-permeable waterproofing process.

In using the conductive fabric as a heat generating fabric or a light emitting fabric, non-uniformity of the surface generated by forming a multilayer structure having a heating layer or a light emitting layer in the structure of the existing conductive fabric occurs, and according to an embodiment of the present invention, the surface The nonuniformity of is improved, so that the durability is improved and the loss of function due to the circuit breakage can be prevented. In addition, the flexibility of the circuit is improved.

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

Example  One

After coating a primer layer with a solvent-type polyurethane resin on a polyester plain weave fabric, it is engraved on the substrate layer by an embossing method, and then a conductive layer is formed using a silver paste component by screen printing, and the conductive layer is formed. The heat generating layer is formed by printing once on a layer by using a polypyrrole-based resin. At this time, the binder was a urethane-based crosslinking agent. In addition, the shape of the bending point of the circuit was formed in a circular predesigned heating pattern. It was then coated with a water dispersible polyurethane composition to form an insulating layer in the cross section.

Example  2

In the same manner as in Example 1, but using a solvent-dispersed silicone as the coating composition of the insulating layer to form an insulating layer in the cross section.

Comparative Example  One

After forming a primer layer with a solvent-type polyurethane resin on a polyester plain weave fabric, a conductive layer is formed first with a silver paste component on the primer layer, and a heat generating layer is printed with a polypyrrole resin on the conductive layer. It is formed by printing once. At this time, the binder was a urethane-based crosslinking agent. In addition, the shape of the bending point of the circuit was formed in a circular predesigned heating pattern. It was then coated with a water dispersible polyurethane composition to form an insulating layer in the cross section.

Comparative Example  2

 As in Comparative Example 1 above, an insulating layer was formed in a cross section using a solvent-dispersed silicone as the coating composition of the insulating layer.

NO.
division Conductive layer Insulating layer Conductive layer formation Coating Composition Formation after intaglio processing Existing method Solvent dispersion type
Polyurethane Solvent dispersion 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. Flex resistance: KSK 0855: 2004, C method (Crumple / Flex method)

After sewing a rectangular coated fabric in the shape of a cylinder, cylindrical specimens are made by holding each end on two opposing disks. Thereafter, one of the disks performs a 90 degree torsional motion, while the other disk is reciprocated in the axial direction to flex the test piece, and the torsional and compression motions are continued 1,000, 5,000, and 10,000 times, and then the resistance is Measured.

In order to examine the durability when worn on clothing, the difference between the resistance of the heating layer and the conductive layer by engraving the base layer, the case where the conductive layer was formed directly on the base layer, and the resistance after the flex resistance test was determined. saw.

NO. division 1,000 5,000 10,000 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 Table 2, when the conductive layer was formed after engravation of the base layer, it was shown that the change in resistance was relatively stable compared with the case where the conductive layer was formed on the base layer in the conventional manner. The more stable the resistance change is, the more excellent the flex resistance is. Therefore, the flex resistance when the conductive layer is formed after engravation of the base layer is more improved.

2. Laundry resistance

NO Detergent dummy Washing conditions 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, oven drying 4 times Neutral detergent Without Wool Course Except dehydration, oven drying

The samples prepared in Example 1 and Comparative Example 1 were measured for each wash under the above conditions (see Table 3).

% Change in resistance = {(resistance after washing-resistance before washing) / resistance after washing} X100

division
% Increase after one wash % Increase after 2 washes % Increase after 3 washes % Increase after 4 washes 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, the resistance increases as the number of washing increases, but the resistance change rate decreases as compared with before washing. Therefore, even if the number of washing was increased, it was confirmed that the durability of the washing is low due to low resistance rise. In particular, the experimental results indicate that the case where the conductive layer is engraved on the base layer to form the conductive layer is more durable than the case where the conductive layer is formed on the base layer in a conventional manner.

So far, the present invention has been described with reference to the preferred embodiments. 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: heating layer or light emitting layer
400: insulating layer

Claims (22)

In the electrically conductive fabric,
A base layer on which a pre-designed intaglio pattern is formed; And
And a conductive layer on which at least a portion of the intaglio pattern is located. The method of claim 1, wherein the substrate layer
Electrically conductive fabric, characterized in that formed by coating a primer layer on top of the base layer for surface uniformity. The method of claim 2, wherein the primer layer
Electrically conductive fabric, characterized in that the water-repellent layer is further formed. The electrically conductive fabric of claim 1, wherein the intaglio pattern is formed by at least one method selected from the group consisting of embossing, offset printing, and coining. The method of claim 1, wherein the conductive layer is
An electrically conductive fabric, characterized in that formed by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing and inkjet printing. The electrically conductive fabric of claim 1, further comprising an insulating layer formed on the conductive layer. The method according to claim 6,
And 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 between the conductive layer and the insulating layer. The method of claim 2, wherein the primer layer
An electrically conductive fabric comprising at least one component selected from the group consisting of polyurethane resins, acrylic resins and silicone resins. The method of claim 1, wherein the conductive layer is
An electrically conductive fabric, characterized in that it is formed of a conductive material or a mixture of a conductive material and a binder. The method of claim 9, wherein the conductive material and the binder forming the conductive layer is
Electrically conductive fabric, characterized in that included in the content ratio of 90:10 to 80:20 by weight. The method of claim 9, wherein the conductive material
An electrically conductive fabric comprising 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 the electrically conductive fabric manufacturing method,
Forming a pre-designed intaglio pattern on top of the base layer; And
And forming a conductive layer on which at least a portion of the intaglio pattern is located. The method of claim 12, wherein the base layer
Method for producing an electrically conductive fabric, characterized in that formed by coating a primer layer on top of the base layer for surface uniformity. The method of claim 13, wherein the primer layer
Electrically conductive fabric manufacturing method characterized in that the water-repellent layer is further formed. The method of claim 12, wherein the intaglio pattern is
Method for producing an electrically conductive fabric, characterized in that formed by at least one method selected from the group consisting of embossing, offset printing and coining. The method of claim 12, wherein the conductive material of the step of forming the conductive layer is
Method for producing an electrically conductive fabric, characterized in that formed on the substrate layer by at least one method selected from the group consisting of screen printing, reverse offset printing, gravure printing and inkjet printing. 13. The method of claim 12, further comprising forming an insulating layer on top of the conductive layer after forming the conductive layer. 18. The method of claim 17,
Between the forming of the conductive layer and the forming of the insulating layer, further comprising the step of forming a heating layer or a light emitting layer in which part or all of the conductive layer is in contact with the conductive layer. How to make. The method of claim 13, wherein the primer layer
An electrically conductive fabric manufacturing method comprising at least one component selected from the group consisting of polyurethane resins, acrylic resins and silicone resins. The method of claim 12, wherein the conductive layer
Method for producing an electrically conductive fabric, characterized in that formed of a conductive material or a mixture of a conductive material and a binder. 21. The method of claim 20, wherein the conductive material and the binder forming the conductive layer are included in an amount ratio of 90:10 to 80:20 by weight. The method of claim 20, wherein the conductive material
A conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel, the method of manufacturing an electrically conductive fabric, characterized in that it comprises one or more components selected from the group consisting of.

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