KR102032332B1 - Method for manufacturing flexible large-area heating textile - Google Patents

Abstract

The present invention relates to a method for manufacturing a large area flexible heating textile capable of manufacturing flexible, large area, eco-friendly, and high-efficiency heating textile for living purposes by using high durability heating paste and electrode silver (Ag) paste with an improved elasticity, and to the large area flexible heating textile manufactured by the method. A planar heating element is formed by manufacturing a fabric through weaving or knitting using a weaving or knitting machine, printing silver paste on the fabric to form an electrode layer, and printing a carbon nanotube on the electrode layer.

Description

Method for manufacturing large-area flexible heating textile and large-area flexible heating textile manufactured by the same {Method for manufacturing flexible large-area heating textile}

The technical field of the present invention relates to a large-area flexible heating textile manufacturing method and a large-area flexible heating textile produced by the same, in particular, using a high-durability heating paste and an electrode silver (Ag) paste with improved elasticity, It relates to a large area flexible heating textile manufacturing method for producing a living heating textile of high efficiency, eco-friendly, high efficiency, and a large area flexible heating textile produced thereby.

Korean Patent No. 10-1328353 (registered on Nov. 5, 2013) forms a silver paste arranged in a zigzag pattern between biaxially stretched transparent PET or OPS film, and then coated CNT ink having excellent heat generation in a plane, for a short time. The present invention relates to a carbon nanotube heating sheet which raises the temperature, is safe from disconnection or fire, and has low power consumption. The carbon nanotube heating layer composed of a base film layer, an electrode layer, and carbon nanotubes doped with metal from above, A film layer, a pressure-sensitive adhesive layer, a protective material layer, the copper thin film layer is formed on both sides of the carbon nanotube heating layer, the carbon nanotube heating layer is chemically bonded to the functional group formed on the end of the carbon nanotube by acid treatment It is characterized by.

Korean Patent No. 10-1711438 (registered on February 23, 2017) includes a heating paste composition in a heating element fabric for a steering wheel, thereby reducing the thickness of the heating pad included in the leather surrounding the steering wheel. It can improve the grip feeling than the heating pad, reduce the cost compared to the existing manufacturing cost, reduce the defective rate, reduce the power consumption, and have high heat resistance, so the resistance change according to temperature is small, and the specific resistance is low. And it is disclosed with respect to a heating element fabric having a heating paste composition capable of driving at low power and a heating steering wheel using the same. According to the disclosed technology, comprising a heating fiber arranged at an interval of 0.4 to 5mm on the surface or inside of a fabric pad having a thickness of 0.4 ~ 2.0mm, the heating fiber has a heating element formed through the heating paste composition, 100 parts by weight of the exothermic paste composition includes 3 to 6 parts by weight of carbon nanotube particles, 0.5 to 30 parts by weight of carbon nanoparticles, 10 to 30 parts by weight of a mixed binder, 29 to 83 parts by weight of an organic solvent, and 0.5 to 5 parts by weight of a dispersant. The mixed binder is a mixture of epoxy acrylate, polyvinyl acetal and phenolic resin, or hexamethylene diisocyanate, polyvinyl acetal and phenolic resin, and phenolic resin based on 100 parts by weight of epoxy acrylate or hexamethylene diisocyanate. It is characterized in that 100 to 500 parts by weight are mixed.

In the prior art as described above, in the case of the planar heating element by weaving the heating material, carbon fiber is used and weaving has a disadvantage of costly, the thickness of the planar heating element by the simple heating paste It has a disadvantage of being thick and heavy, and in the case of the on-line heating element by weaving the heating material, the flexibility is inadequate, and the products such as clothing and accessories using the heating element have a disadvantage inevitably expensive and inconvenient. In particular, in the case of the ink / film type heating element, the change in resistance value occurs due to the separation between the carbon paste and the metal foil, and the short heating type of the heating element is impossible to cause shortage and washing, and precipitation and lack of adsorption power of the carbon ink occur. There is this. In addition, in the case of the woven / knitted plane heating element, a synthetic resin is blended into the graphite powder, and thermal curing occurs during repeated heat supply, and breakage and shorting are caused by the change in the resistance value due to separation between the fibers during tension of the heating element. The conductive carbon black has a disadvantage in that it is difficult to constantly impregnate the temperature distribution, and it is difficult to develop a heating element of 30 (cm ² ) or less. In addition, in the case of the linear heating element, heat is concentrated in the place where the heating wire is located, and thus a low temperature image is likely to occur, and there is a disadvantage that there is a foreign material feeling due to the heating wire and a thickness on the heating element.

In the prior art as described above, in the case of a heating type of foil type, there is a disadvantage in that the elasticity of the thermosetting paste is used as an electrode part and the phenomenon of crushing when drawn is generated. In the case of heating products, there are also disadvantages such as low durability, low elasticity, weight, foreign body heat generation.

In the conventional technique as described above, in the case of the heating element coated with carbon paste on cotton or PET, a net weaving process is necessary to prevent local temperature rise, and the carbon ink heating element is used as an electrode. Silver paste also has the disadvantage that resistance changes and disconnections occur with distance. In addition, the production of four or more wire leads to product size constraints, it is difficult to produce a small-area surface heating element, and the durability of heat generation due to uneven temperature rise is reduced, and general carbon is mixed with particles by partially mixing carbon and metal in a binder. Only when the electricity is passed through, there is a disadvantage that the electrical concentration / high heat occurs when a short circuit occurs between the particles.

Korea Patent Registration No. 10-1328353 Korea Patent Registration No. 10-1711438

Disclosure of Invention Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned disadvantages, and is flexible, large-area, eco-friendly, and high-efficiency heating textiles utilizing a highly durable heating paste and an improved electrode silver (Ag) paste. It is to provide a large area flexible heating textile manufacturing method and a large area flexible heating textile produced thereby.

Means for solving the above problems, according to one feature of the invention, the fabric production step of producing a fabric through weaving or knitting using a weaving machine or knitting machine; An electrode layer forming step of forming an electrode layer by printing a silver paste on the raw unit; And a planar heating element forming step of printing a carbon nanotube on the electrode layer to form a planar heating element.

In one embodiment, the fabric production step, characterized in that for producing a fiber-based fabric.

In one embodiment, the fabric production step, characterized in that for producing a blended yarn knit.

In one embodiment, the fabric production step, characterized in that to produce a knit of a blended cis-trans type knitted tissue.

In one embodiment, the fabric production step, characterized in that the laminating with EEA or EVA-based hot melt on the surface of the fiber.

In one embodiment, the fabric production step is characterized in that the resin is pre-treated coating the surface of the fiber.

In one embodiment, the fabric production step is characterized in that the surface of the fiber pre-treated with epoxy acrylate, polyvinyl acetal and phenolic resin, or hexamethylene diisocyanate, polyvinyl acetal and phenolic resin.

In an embodiment, the forming of the electrode layer may include directly printing the electrode silver paste on the raw unit by using a conductive paste print.

In one embodiment, the electrode layer forming step, characterized in that to form a silver paste for forming an electrode layer in the circle unit to have a predetermined interval and width between the electrodes.

In an embodiment, the planar heating element forming step may include printing carbon nanotubes by using one of screen, gravure, gravure offset, flexo, and inkjet printing methods.

In one embodiment, the step of forming the planar heating element is characterized in that the carbon nanotubes are printed after adjusting the printing conditions and the rheology of the carbon nanotube solution according to the pre-set according to the material properties of the fabric.

In one embodiment, the step of forming the planar heating element, in the case of the screen printing method, supplying the carbon nanotube solution on the screen plate, and pushes the carbon nanotube solution on the screen plate with a squeegee to transfer the carbon paste on the silver paste It is characterized by printing nanotubes.

In one embodiment, the step of forming the planar heating element, characterized in that the pattern is formed by controlling the positioning of the silver paste and the screen plate, the filling of the carbon nanotube solution by squeegee, the separation of the screen plate, the transition with a printing press.

In one embodiment, the step of forming a planar heating element, characterized in that to produce a planar heating element by printing on the silver paste using a carbon nanotube solution.

In an embodiment, the planar heating element forming step may be performed by printing a metal paste on the silver paste by applying a metal-carbon nanotube by doping a metal on the carbon nanotube.

In an embodiment, the planar heating element forming step may include printing graphene on the silver paste to form a planar heating element.

In one embodiment, the graphene or the carbon nanotubes, it is characterized in that it is prepared without a dispersant by a multi-hydrogen bond.

In one embodiment, the step of forming a planar heating element, while forming a composite of carbon nanotubes, characterized in that to form a planar heating element by printing a carbon nanotube composite on the silver paste.

In one embodiment, the carbon nanotube composite, in addition to the carbon nanotube particles, it is characterized in that it comprises carbon nanoparticles, a mixed binder, an organic solvent, a dispersant or an amphoteric surfactant or ionic surfactant.

In one embodiment, the carbon nanoparticles, characterized in that the graphite nanoparticles.

In one embodiment, the mixed binder is a mixture of epoxy acrylate or hexamethylene diisocyanate, polyvinyl acetal and phenolic resin, or a mixture of hexamethylene diisocyanate, polyvinyl acetal and phenolic resin Characterized in having a.

In one embodiment, the organic solvent, carbitol acetate, butyl carbitol acetate, DBE, ethyl carbitol, ethyl carbitol acetate, dipropylene glycol methyl ether, cellosolve acetate, butyl cellosolve acetate, butanol and octanol It is characterized by two or more mixed solvents selected from.

In one embodiment, the dispersant is characterized in that BYK.

In one embodiment, the amphoteric surfactant is characterized in that Triton X-100.

In one embodiment, the ionic surfactant, characterized in that the SDS.

Means for solving the above problems, according to another feature of the invention, the fabric production step of producing a fabric through weaving or knitting using a weaving machine or knitting machine; An electrode layer forming step of forming an electrode layer by printing a silver paste on the raw unit; And it provides a large-area flexible heating textile manufactured by a large-area flexible heating textile manufacturing method comprising the step of forming a surface heating element to form a surface heating element by printing carbon nanotubes on the electrode layer.

Advantageous Effects of the Invention The present invention provides a method for manufacturing a large-area flexible heating textile for manufacturing a flexible, large-area, eco-friendly, high-efficiency heating textile using a highly durable heating paste and an improved electrode silver paste. By providing a large-area flexible heating textile manufactured by the present invention, it has high durability by using a heating paste such as carbon nanotubes, graphene, etc. It is suitable for heating products, functional textiles, knitted living accessories and bedding products that require high flexibility and withstand high external pressures.

According to the present invention, the flexible conductive paste and printing process, smoothness, safety textiles, flexible devices and design optimization can reduce the cost more than 30%, reduce the weight by more than 20% and increase the elasticity by more than 20% It also has an effect.

1 is a view for explaining a large-area flexible heating textile manufacturing method according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a fabric as an example in the fabric production step of FIG. 1.
3 is a view illustrating carbon nanotubes as an example in the planar heating element forming step of FIG. 1.
4 is a diagram illustrating graphene as an example in the planar heating element forming step of FIG. 1.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus, the scope of the present invention should be understood to include equivalents for realizing the technical idea. In addition, the objects or effects presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereby.

The meaning of the terms described in the present invention will be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be named a second component, and similarly, the second component may also be named a first component. When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is said to be "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "include" or "have" refer to features, numbers, steps, operations, components, parts or parts thereof described. It is to be understood that the combination is intended to be present and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, actions, components, parts or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted as being consistent with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present invention.

Now, a method for manufacturing a large-area flexible heating textile according to an embodiment of the present invention and a large-area flexible heating textile manufactured by the same will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a large-area flexible heating textile manufacturing method according to an embodiment of the present invention, Figure 2 is a view illustrating an example of the fabric in the fabric production step of Figure 1, Figure 3 is a plan view in FIG. 4 is a view illustrating carbon nanotubes in the heating element forming step as an example, and FIG. 4 is a diagram illustrating graphene as an example in the planar heating element forming step of FIG. 1.

1 to 4, the method for manufacturing a large-area flexible heating textile, by applying a high-durability conductive face print to produce a large-area flexible heating textile that can be stretched 20% or more, wherein the fabric production step (S100), the electrode layer Forming step (S200), the planar heating element forming step (S300).

Fabric production step (S100), to produce a fabric through weaving (or knitting) using a weaving machine (or knitting machine).

In one embodiment, the fabric production step (S100), it is possible to produce a living fiber-based fabric, for example to produce a blended yarn for maximizing heating. Here, the blended yarn knit may be a knit of a blended yarn cis-trans knitted tissue as shown in FIG. 2.

In one embodiment, the fabric production step (S100), by laminating (Ethylene Ethyl Acrylate) or EVA (Ethylene Vinyl Acetate) -based hot melt on the surface of the living fiber, forming an electrode layer ( S200) to prevent cracks and deformation of the electrode layer to be formed, it can also prevent the shrinkage of the living fiber-based fabric during drying.

In one embodiment, the fabric production step (S100), the media for the penetration and sharpness of the electrode layer formed in the electrode layer forming step (S200) may be a pre-treatment coating the resin on the surface of the living fiber. Here, the resin may be an epoxy acrylate, polyvinyl acetal and phenolic resin, or may be hexamethylene diisocyanate, polyvinyl acetal and phenolic resin.

In the electrode layer forming step (S200), the silver (Ag) paste is printed on the raw unit produced in the fabric production step (S100) to form an electrode layer.

In an embodiment, the electrode layer forming step S200 may directly print the electrode silver paste having improved elasticity by using the conductive paste print on the raw unit produced in the fabric production step S100.

In one embodiment, the electrode layer forming step (S200), in order to be able to adjust the flow of the current in accordance with the distance and the width between the electrodes, the silver paste for forming the electrode layer to have a predetermined interval and width between the electrodes to produce a step ( By forming in the raw unit produced in S100, it is possible to determine the heat generating temperature rise time and the maintenance time of the planar heating element (for example, carbon nanotubes) formed in the planar heating element forming step (S300).

The planar heating element forming step (S300) forms a planar heating element by printing carbon nanotubes (CNTs) on the electrode layer (ie, silver paste) formed in the electrode layer forming step (S200).

In one embodiment, the planar heating element forming step (S300), one of the printing method of screen, gravure, gravure offset, flexo, inkjet when printing carbon nanotubes, it is also produced in the fabric production step (S100) According to the characteristics of the fabric material (e.g., irregularities, stretch, density, etc.), the printing conditions (e.g., temperature, nozzle spray, fabric feed rate, etc.) and carbon nanotube solution After adjusting the rheology, carbon nanotube printing can be performed.

In one embodiment, the planar heating element forming step (S300), in the case of screen printing, in the case of carbon nanotube printing, supply the carbon nanotube solution on the screen plate, and squeegee the carbon nanotube solution on the screen plate (squeegee ) To be accurately transferred to the silver paste formed in the electrode layer forming step (S200) and printed. At this time, a pattern may be formed by controlling the positioning of the silver paste and the screen plate, filling of the carbon nanotube solution by squeegee, screen plate separation, transition, and the like with a printing press.

In one embodiment, the planar heating element forming step (S300), by printing the carbon nanotubes on the silver paste formed in the electrode layer forming step (S200) to avoid the need for a separate antioxidant layer, this feature of the excellent silver paste By making use of it, the process of apply | coating the insulating synthetic resin hardened by coating after screen printing can be skipped, and productivity and economy can be improved. Here, carbon nanotubes are new materials in which hexagons made of 6 carbons are connected to each other to form a tubular shape, and the diameter of the tube is only several to several tens of nanometers, the electrical conductivity is similar to copper, and the thermal conductivity is the most excellent in nature. It is like a diamond, and is 100 times stronger than steel, and carbon fiber can be broken by only 1% deformation while being able to withstand 15% deformation. In addition, as shown in Figure 3, the carbon nanotubes are carbon allotrope consisting of CNT carbon, one carbon is combined in the hexagonal honeycomb pattern of the other carbon atoms to form a tube, the material of a small region of 0.01um level It is a safe heating element with advantages such as mechanical properties and electrical selectivity superior to existing carbon black.

In one embodiment, the planar heating element forming step (S300), by printing on the silver paste formed in the electrode layer forming step (S200) using a carbon nanotube solution to produce a planar heating element, thereby increasing the temperature generated from the existing carbon paste Increasing the resistance can solve the problem of a fire caused by the change in the shape of the plate-shaped synthetic resin material and the local resistance change.

In one embodiment, the planar heating element forming step (S300), by doping the metal on the carbon nanotubes by applying a metal-carbon nanotubes to the printed on the silver paste formed in the electrode layer forming step (S200), the temperature resistance coefficient It is close to '0', and there is no change in resistance value even after repeated use, so it is easy to secure reliability, and it is possible to realize a positive thermistor (PTC) property and to improve current flow.

In an embodiment, the planar heating element forming step S300 may form a planar heating element by printing a high-durability heating paste such as graphene on the silver paste formed in the electrode layer forming step S200. Here, graphene has the unique stretchable properties of the material. In addition, graphene (or carbon nanotubes) may be prepared without a dispersant by polyhydrogen bonds, as shown in FIG. 4.

In an embodiment, the planar heating element forming step S300 may include forming a composite of carbon nanotubes, and the carbon nanotubes are formed on the electrode layer (ie, the silver paste) formed in the electrode layer forming step S200. May be printed to form a planar heating element. In this case, the composite of carbon nanotubes, in addition to carbon nanotube particles, carbon nanoparticles such as graphite nanoparticles, epoxy acrylate or hexamethylene diisocyanate, polyvinyl acetal and phenol A mixed binder having a mixed form of a phenol resin or a mixed form of hexamethylene diisocyanate, polyvinyl acetal, and a phenolic resin, carbitol acetate, and butyl carbotol two or more mixtures selected from acetate, DBE (dibasic ester), ethyl carbitol, ethyl carbitol acetate, dipropylene glycol methyl ether, cellosolve acetate, butyl cellosolve acetate, butanol and octanol An organic solvent that is a solvent, a dispersant such as BYK, or an amphoteric surfactant such as Triton X-100, or It may comprise an ionic surfactant such as SDS. In addition, the carbon nanotube composite formation is PC, Nylon, PET. By improving the dispersibility of carbon nanotubes in PE and metal, not only electrical conductivity but also thermal conductivity can be enhanced.

The large-area flexible heating textile manufacturing method 100 having the configuration as described above, in manufacturing a large-area flexible heating textile using heat generation and conductive paste nanomaterials, utilizes a conductive paste print, CNT, graphene, etc. The same high-durability heating paste and stretched electrode silver paste can be printed directly onto the living fiber-based fabric wing to produce flexible, large-area, eco-friendly, and high-efficiency heating textiles. It has high durability by using silver paste and electrode material has high elasticity. It provides stretchability without exothermic heating element, resists high external pressure and requires flexibility, heating products, functional fabrics, and knitted fabrics. Suitable for accessories and bedding products.

The large-area flexible heating textile manufacturing method 100 having the configuration as described above is a flexible conductive paste and printing process, smoothness, safety textiles, flexible devices and design optimization, which saves more than 30% of the cost and weight Can be reduced by more than 20% and the elasticity can be increased by more than 20%.

The large-area flexible heating textile manufactured by the large-area flexible heating textile manufacturing method according to an embodiment of the present invention, the fabric production step of producing a fabric through the weaving (or knitting) using a weaving machine (or knitting machine) (S100), an electrode layer forming step (S200) for forming an electrode layer by printing a silver (Ag) paste on the raw unit produced in the fabric production step (S100), and an electrode layer formed in the electrode layer forming step (S200) (that is, a silver paste) ) Is manufactured by a large-area flexible heating textile manufacturing method including a planar heating element forming step (S300) for printing a carbon nanotube (CNT) on the planar heating element to form a planar heating element.

As described above, the embodiment of the present invention is not implemented only through the above-described apparatus and / or operation method, but through a program for realizing a function corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded, and the like. The implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments. Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

S100: Fabric Production Steps
S200: electrode layer forming step
S300: plane heating element forming step

Claims (5)

Fabric production step of producing a fabric by weaving or knitting using a weaving machine or knitting machine; An electrode layer forming step of forming an electrode layer by printing a silver paste on the raw unit; And a planar heating element forming step of forming a planar heating element by printing carbon nanotubes on the electrode layer.
The fabric production step is to produce a knitted fabric of mixed yarn cis-trans type knitted fabric as a fabric;
The electrode layer forming step may include forming an electrode layer to have a predetermined interval and width between the electrodes;
The planar heating element forming step may include printing carbon nanotubes between predetermined electrodes while covering the electrode layer; The carbon nanotubes are manufactured without a dispersant by a multi-hydrogen bond, and hexagonal groups consisting of six carbons are connected to each other to form a tubular shape. In the form of a tube; Method of manufacturing a large-area flexible heating textile, characterized in that for printing the metal nano-carbon nanotubes by applying a metal-carbon nanotube paste.
delete delete delete Fabric production step of producing a fabric by weaving or knitting using a weaving machine or knitting machine; An electrode layer forming step of forming an electrode layer by printing a silver paste on the raw unit; And a planar heating element forming step of forming a planar heating element by printing carbon nanotubes on the electrode layer.
The fabric production step is to produce a knitted fabric of mixed yarn cis-trans type knitted fabric as a fabric;
The electrode layer forming step may include forming an electrode layer to have a predetermined interval and width between the electrodes;
The planar heating element forming step may include printing carbon nanotubes between predetermined electrodes while covering the electrode layer; The carbon nanotubes are manufactured without a dispersant by a multi-hydrogen bond, and hexagonal groups consisting of six carbons are connected to each other to form a tubular shape. In the form of a tube; A large-area flexible heating textile manufactured by a large-area flexible heating textile manufacturing method, characterized in that the carbon nanotubes are doped with metal and printed with a paste applied with metal-carbon nanotubes.

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