KR20110109715A

KR20110109715A - Heating fabrics and method of manufacturing the same

Info

Publication number: KR20110109715A
Application number: KR1020100029561A
Authority: KR
Inventors: 박성미; 정경희
Original assignee: 코오롱글로텍주식회사
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2011-10-06

Abstract

The present invention relates to a heat generating fabric and a method for manufacturing the same, and specifically, in a heat generating fabric including conductive yarns, a fabric consisting of yarns and conductive yarns made of synthetic fibers, regenerated fibers, or natural fibers, wherein the conductive yarns have a predesigned pattern A fabric layer made of fabric; A heating part formed in a predesigned pattern of lines or surfaces such that some or all of the conductive yarns are in contact with the top of the fabric layer; And a conductive yarn in the fabric layer of the fabric, including an insulating layer coated, printed, or laminated with a polymer resin on top of the heating unit, so that the conductive yarn serves as an electrode, thus a simple process without the addition of a step of forming a separate electrode thereafter. The present invention relates to a heat generating fabric having an effect of providing a heat generating fabric and a manufacturing method thereof.

Description

Heat-generating fabric and its manufacturing method {HEATING FABRICS AND METHOD OF MANUFACTURING THE SAME}

The present invention relates to an electrically conductive fabric, and more particularly, to a heat generating fabric and a method of manufacturing the same.

Smart Wear is a new product designed to use digital functions anytime and anywhere by using wrj new 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. Thus, a new concept of clothing that combines the functionality of the materials (Hifunction materials properties) that the fibers or clothing itself senses external stimuli 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 in the United States and Europe 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 conductive fibers, fabrics, and various parts that have 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 a possibility of weight reduction and volume reduction, thereby enabling the development of military uniforms integrating the healing function and communication function. Even in modern warfare-oriented warfare, the development of this technology is urgently needed because soldiers must carry more than 45 kg of equipment when fully armed.

Recently, the heating element researched for manufacturing smart wear has a function of automatically generating heat by measuring external environment and body temperature such as temperature, humidity, and ultraviolet light. Therefore, the heat generation function is exhibited even with a simpler configuration, and the demand for durability for more comfortable wearing and no problem in washing is increasing.

In order to solve the above problems, an object of the present invention is to produce a fabric using a conductive yarn without limiting the dynamic wearability, a heating fabric capable of forming a heat generating site by forming a circuit on the fabric itself and a manufacturing method thereof to provide.

In addition, another object of the present invention is to provide a heat generating fabric and a method of manufacturing the same, while improving heat generation characteristics while reducing power consumption.

Still another object of the present invention is to provide a heat generating fabric and a method for manufacturing the same, which can satisfy both electrical properties and intrinsic properties of fabrics that can be used in clothing.

In order to achieve the above object, the present invention is a heat generating fabric including a conductive yarn, a fabric consisting of a yarn and a conductive yarn made of synthetic fibers, regenerated fibers or natural fibers, the conductive layer of the fabric layer consisting of a pre-designed pattern; A heating part formed in a free pattern of a line or a surface such that a part or all of the conductive yarn contacts the upper part of the fabric layer; And an insulating layer including an insulating layer coated, printed, or laminated with a polymer resin on the heating unit.

In another aspect, the present invention provides a heat generating fabric further comprising a conductive layer that can be freely formed by a pre-designed electrical pattern on the top of the fabric layer.

In another aspect, the present invention provides a heat generating fabric selected from the group consisting of a conductive wire, an insulating coated metal wire, carbon fiber yarn, a fiber yarn containing a conductive polymer, a polymer resin wire containing a conductive polymer, and mixtures thereof.

In another aspect, the present invention provides a heating element wherein the metal wire is selected from a wire consisting of gold, platinum, palladium, copper, aluminum, tin, iron, nickel and mixtures thereof.

In another aspect, the present invention provides a heating element is formed of a conductive material or a mixture of a conductive material and a binder.

In another aspect, the present invention provides a heating element selected from the group consisting of a conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron, nickel and mixtures thereof.

In another aspect, the present invention provides an exothermic fabric selected from the group consisting of polyaniline, polypyrrole, polythiophene and mixtures thereof.

In another aspect, the present invention provides a heating material selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a melamine resin, an epoxy resin and mixtures thereof.

In another aspect, the present invention provides a exothermic fabric, wherein the binder is a water dispersible polyurethane.

In addition, the present invention is a heat generation selected from the group consisting of a polymer resin of the insulating layer is a polyurethane resin, acrylic resin, silicone resin, polyester resin, PVC resin, polytetrafluoroethylene (PTFE) resin and mixtures thereof Provide fabric.

In another aspect, the present invention is a method of manufacturing a heating fabric including a conductive yarn, the fabric layer forming step of manufacturing the fabric so that the conductive yarn is made of a pre-designed pattern and the yarn made of synthetic fibers, recycled fibers or natural fibers ; A heating part forming step of forming a free pattern of lines or faces so that a part or all of the conductive yarns are in contact with the top of the fabric layer; And an insulating layer forming step of coating, printing or laminating a polymer resin on the heating unit.

In another aspect, the present invention provides a method for producing a heating fabric further comprising the step of forming a conductive layer on top of the fabric layer.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values as are indicative of preparation and material tolerances inherent in the meanings mentioned, and are intended to be accurate or to facilitate understanding of the invention. Absolute figures are used to prevent unfair use by unscrupulous infringers.

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

1 is a cross-sectional view of a heat generating fabric according to a preferred embodiment of the present invention. Referring to FIG. 1, the heating fabric 10 of the present invention includes a fabric layer 100 including a conductive yarn 101, a heating part 300, and an insulation layer 500, and may further include a conductive layer 400 on the fabric layer. In addition, the heating part 300 may be formed in the conductive yarn 101 over a portion (solid line) or the whole (dotted line).

In the exothermic fabric according to an embodiment of the present invention, the fabric layer 100 is a fabric consisting of a yarn and a conductive yarn made of synthetic fibers, recycled fibers or natural fibers, the conductive yarn is composed of a pre-designed pattern, in any form It may be a woven fabric, a knitted fabric, a nonwoven fabric, a fibrous web, or the like, and may 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 and conductive yarns, cellulose regenerated fibers such as rayon / acetate, and natural fibers such as conductive yarns and cotton / wool and conductive yarns.

Due to the conductive yarn constituting the fabric layer, the electrical coupling to the fabric is easy, and there is an effect that the exothermic performance of the heating part to be described later is excellently exhibited without the addition of a conductive layer. In addition, the conductive yarn has a variety of desired pattern formation in the fabric layer, there is an effect that can be easily electrically connected without additional processing because the touch difference with the yarn is not large.

Accordingly, the conductive yarn is selected from the group consisting of insulated coated metal wire, carbon fiber yarn, fiber yarn including conductive polymer, polymer resin wire including conductive polymer, and mixtures thereof. The metal wire may be a wire selected from the group consisting of gold, platinum, palladium, copper, aluminum, tin, iron, nickel and mixtures thereof such as polyurethane resin, acrylic resin, silicone resin, polyester resin, PVC resin, polytetra It can be used by insulating coating with a resin consisting of fluoroethylene (PTFE) resin, polyether sulfone, fluororesin and mixtures thereof, the metal type and the coating resin type is not limited thereto. In addition, the conductive polymer constituting the conductive yarn may be selected from the group consisting of polyaniline, polypyrrole, polythiophene, and mixtures thereof, and may be used as the conductive yarn by preparing the fiber in a fiber form through spinning. In particular, the insulating coated metal wire of the conductive yarn is formed with an insulating coating layer on the outer surface of the conductive material, it is composed of at least one strand. Insulating coating is composed of a plurality of strands of copper wires united together by using a wire formed by one strand, wherein at this time, one strand of copper wire is selected to have a diameter of 0.01 ~ 0.1mm coated with insulation.

On the other hand, the conductive yarn can be improved in durability and insulation by forming into a structure coated with a thermoplastic resin after being braided or wound in the fiber yarn.

The heating part 300 may be formed on the top of the fabric layer 100, and the heating part 300 may be formed in a free form of a line or a surface to contact part or all of the conductive yarn 101 of the fabric layer 100. The fabric layer 100 is microscopically very uneven in its surface, and there are extremely many fine pores due to the gap between the fibers. Therefore, in order to ensure the uniformity of the surface and to generate heat in contact with the conductive yarn, the heating part 300 of the present invention may be formed by applying a mixture of a conductive material and a binder in a line or a face in a predesigned pattern. A pattern of the heating unit 300 is formed as a material, and a conductive material is adhered to the fabric layer by coating, printing, and laminating one surface of the fabric layer with a binder. The conductive material may be polyaniline, polypyrrole, polythiophene, or the like as the conductive polymer, and conductive carbon black may be mixed therein. It may also be selected from the group consisting of carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron, nickel and mixtures thereof. Meanwhile, the binder may be selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a melamine resin, an epoxy resin, and a mixture thereof, and the water-dispersible polyurethane resin may increase adhesiveness and tensile strength. Such a binder is advantageous in that a heating part including a conductive material adheres to a fabric layer, and a resin component constituting a layer to be described later can be prevented from penetrating into the fabric in a manufacturing process.

A conductive layer 400 may be further formed on the upper or lower portion of the heating part 300. The conductive layer 400 may be further included in order to increase an electric heating effect in addition to the conductive yarn of the fabric layer. However, it means that the conductive layer can be selectively formed and can be excluded according to the user's request.

The conductive layer 400 may be formed by applying a conductive material or a mixture of a conductive material and a binder. The conductive material may be a conductive polymer, a metal material such as carbon, silver, or a mixture of the metal material and the binder. Specifically, the conductive filler is dispersed in a vehicle, and the cured film after printing refers to a material exhibiting conductivity, and is typically a LCD electrode printing, a touch screen printing, a conductive pattern printing on a circuit board, or a contact portion of a thin film switch plate. And pattern printing and electromagnetic shielding. The conductive filler is preferably silver based among conductive metals (silver, gold, platinum, palladium, copper, nickel and the like). The conductive polymer may be polyaniline, polypyrrole, polythiophene, or the like, and conductive carbon black may be mixed therein. On the other hand, the binder material of the conductive layer may be selected from the group consisting of polyurethane resins, acrylic resins, silicone resins, melamine resins, epoxy resins and mixtures thereof. The conductive layer 400 according to the present invention may be formed of a single layer or a plurality of layers made of the material, in this case, there is an effect that the electrical conduction efficiency, that is, the heating effect can be enhanced according to the user's request.

Meanwhile, the conductive material and the binder of the heating unit 300 or the conductive layer 400 are preferably mixed at a ratio of 90:10 to 80:20 (by weight), but when the binder exceeds the above range, there is a problem that the conduction function is deteriorated. And if it is less than the above range has the disadvantage that the adhesive strength is lowered.

The heating unit 300 or the conductive layer 400 is preferably in the thickness of 2 to 500㎛, if less than the range there is a problem that it is difficult to ensure the uniformity of the thickness of the conductive layer, if it exceeds the range the resistance value falls under the same voltage As a result, the current value increases and eventually power consumption increases. In addition, the width of the conductive layer 400 is preferably about 10 to 20 mm. As the width of the conductive layer increases, the resistance value decreases, so that the current can stably flow. There is a problem in coating properties.

An insulating layer 500 may be formed on the heating unit 300 or the conductive layer 400. Insulation layer 500 is selected from the group consisting of polyurethane resins, acrylic resins, silicone resins, polyester resins, PVC resins, polytetrafluoroethylene (PTFE) resins and mixtures thereof by coating, printing or laminating insulation layer 500 Can be formed. The insulating layer 500 prevents cracks such as cracks in the conductive layer, provides flexibility to the fabric, and performs waterproof or waterproof function.

2 is a plan view of a heat generating fabric according to an embodiment of the present invention. (Insulation layer not shown) Referring to FIG. 2, the conductive yarn 101 is formed in a parallel pattern on the plane of the far-end layer 100, and the heating part 300 is formed in contact with the conductive yarn in parallel to each bent part. In addition, it means that the heating unit 300 may be formed over a portion (solid line) or the whole (dotted line). Thus, due to the electrically connectable fabric layer configured to include the conductive yarn 101, a heat generating effect is expected with a simple configuration without forming a separate conductive layer.

Hereinafter will be described a method for manufacturing a heat generating fabric according to an embodiment of the present invention.

3 is a manufacturing process diagram of a heat generating fabric according to an embodiment of the present invention. Referring to FIG. 3, the manufacturing of the heating fabric of the present invention is performed in the order of the fabric layer forming step S100, the heating unit forming step S200, and the insulating layer forming step S300, after the fabric layer forming step, optionally, the calendering step S110. , Conductive layer forming step S130 may be further included.

In the present invention, a method of manufacturing a heating fabric including a conductive yarn, while manufacturing the fabric from the yarn and the conductive yarn made of synthetic fibers, recycled fibers or natural fibers, the fabric layer forming step of manufacturing the fabric so that the conductive yarn is a pre-designed pattern May proceed. The fabric layer may be formed of a fabric manufactured so that the conductive yarn becomes a predesigned pattern while weaving or knitting the yarn and the conductive yarn of the aforementioned kind. The pattern of the conductive yarn can be freely formed, and is not limited to one form.

As described above, when the fabric forming the fabric layer is prepared in the fabric layer forming step, the calendering step S110 for supplying the fabric of the fabric layer between the two pressing rollers in order to compensate for the shortcomings of the surface irregularities in the case of fabric or knitted fabric is It may be further included. As a result, the surface of the fabric layer may be smooth, the voids in the fabric layer may be offset, and the bending resistance may be compensated for. This calendering step is a process that can be selectively performed according to the characteristics of the fabric.

In addition, the present invention may further include a conductive layer forming step S130 that can be energized on top of the fabric layer before the heating unit forming step, if necessary.

Heating for forming a pre-designed pattern of lines or faces to contact a part or all of the conductive yarns on the top of the fabric layer with respect to the fabric provided with the fabric layer including the conductive yarns that have undergone the calendering step or not to be calendered. The sub forming step S200 may be performed.

The heating unit 300 or the conductive layer 400 may be coated in various ways such as coating, printing, transfer printing, and the like. 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 respect, the fabric according to the present invention may be referred to as a flexible printed fabric circuit board (FPFCB).

The pattern formation of the printed circuit board may be designed such that the width and length of the conduction and the heating pattern according thereto are determined, and the resistance value is measured for each heating element.

Heating portion 300 or conductive layer 400 of the present invention is 2 to 500㎛ thickness, 10 to 20mm width, the resistance of the fabric is preferably maintained before and after washing 0.5 ~ 4Ω. In addition, in the case of using carbon in the electrode 1 to 30% by weight, silver (silver) may be 1 to 70% by weight. The binder that can be used for the heating part or the conductive layer may be selected from the group consisting of polyurethane resins, acrylic resins, silicone resins, melamine resins, epoxy resins, and mixtures thereof.

After the heating part 300 is formed, an insulating layer forming step S300 of coating, printing or laminating a polymer resin on the upper portion thereof may be performed. The insulating layer 500 may be formed by directly coating, printing, or laminating a polyurethane resin, an acrylic resin, a silicone resin, a polyester resin, or a polytetrafluoroethylene (PTFE) resin. In the case of the coating method, a dry method is preferable, and in the case of a laminating method, a hot melt type dot or gravure method is preferable. In addition, in the case of the coating method in the insulating layer forming step, the resistance value varies depending on the coating composition, it may affect the durability accordingly.

In addition, the insulating layer may be formed on both surfaces as well as the cross section.

Therefore, in consideration of the need for washing several times due to the characteristics of the fabric, the selection of a coating composition for exhibiting long-term insulation phenomena, that is, excellent washing resistance can be a very important factor.

As described above, the exothermic fabric of the present invention and its manufacturing method include a conductive yarn in the fabric layer of the fabric, so that the exothermic fabric is provided in a simple process without the addition of a step of forming a separate electrode after the conductive yarn serves as an electrode. It works.

In addition, the heat generating fabric of the present invention and the method of manufacturing the same can enable the formation of a conductive pattern when forming the fabric layer of the fabric, it is possible to implement a heating function while ensuring various dynamic wearability.

In addition, the heating fabric of the present invention and its manufacturing method is provided with a conductive yarn in the form of fibers in the fiber fabric, the circuit design is possible regardless of bending or folding due to the elasticity, flexibility, flex resistance, which is a characteristic of the fiber fabric, and the disconnection There is a less effective effect of circuit damage.

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

In addition, the exothermic fabric of the present invention and a method for manufacturing the same have an effect of having durability by washing by forming an insulating layer coated on one or both sides of the fabric.

1 is a cross-sectional view of a heat generating fabric according to an embodiment of the present invention.
Figure 2 is a plan view of a heat generating fabric according to an embodiment of the present invention.
Figure 3 is a manufacturing process of the exothermic fabric according to an embodiment of the present invention.

Through the following examples will be described in more detail.

Example 1

After weaving polyester fibers and polypyrrole-based fibers in plain weave, the polypyrrole fibers form a fabric layer with a fabric having the pattern of FIG. 2, and then, as shown in FIG. 2, a polypyrrole-based resin on top of the fabric layer. The heating part was formed by printing once in a printing manner such that the bent portion contacted the polypyrrole-based resin of a single layer. In this case, an acrylic crosslinking agent was used. It was then coated with a water dispersible polyurethane composition to form an insulating layer in the cross section.

Example 2

Except for the polypyrrole-based fibers of the fabric layer was carried out in the same manner as in Example 1 except that the silver yarn used an insulating coated metal wire coated with acrylic resin.

Example 3

A conductive layer having the same pattern as the heating part was formed on the top of the fabric layer with a silver paste component, and the binder was performed in the same manner as in Example 1 except that the binder was used as an acrylic binder in a silver paste: binder = 50: 50 (weight ratio). It was.

Comparative Example 1

In addition to forming a primer layer with a solvent-type polyurethane resin on a polyester plain weave fabric not including a conductive yarn, a fabric was prepared in which a heating part, a conductive layer, and an insulating layer were not formed.

Comparative Example 2

After forming a primer layer with a solvent-type polyurethane resin on a polyester plain weave fabric, and then first formed a conductive layer with a silver paste and a water-dispersible polyurethane 50:50 (weight ratio) component on the primer layer, the upper conductive layer The polypyrrole-based resin is formed by printing a heating unit once by a printing method. In this case, an acrylic crosslinking agent was used. 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.

※ Test Methods

1. Measurement of resistance change rate

Check the resistance by measuring the resistance before and after the coating of the insulating layer with an Ohm meter to determine the insulation change.

Resistance change rate (%) = {(resistance after coating-resistance before coating) / resistance before coating} × 100

2. Tensile strength: KS K 0520

Elongation and tensile strength of the Examples and Comparative Examples were measured three times to obtain an average value. The grip interval was 76mm, the tensile speed was 5mm / min, the load was 1KN (100kgf), the temperature was 73F, and the humidity was 50%.

3. Flexibility: KS K 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. The resistance difference between before and after coating was compared to determine the durability of the garment.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

10; Fever
100; Distal layer, 101; Challenger
300; Heating section 400; Conductive layer
500; Insulating layer

Claims

In the heat generating fabric containing a conductive yarn,
A fabric layer composed of a yarn composed of synthetic fibers, regenerated fibers or natural fibers and a conductive yarn, the conductive layer comprising a fabric composed of a predesigned pattern;
A heating part formed in a predesigned pattern of lines or surfaces such that some or all of the conductive yarns are in contact with the top of the fabric layer; And
An exothermic fabric comprising an insulating layer coated, printed or laminated with a polymer resin on the heating unit.

The method of claim 1,
Heating element further comprises a conductive layer that can be freely formed by a pre-designed electrical pattern on the top of the fabric layer.

The method of claim 1,
The conductive yarn is a heat generating fabric selected from the group consisting of insulating coated metal wire, carbon fiber yarn, fiber yarn containing a conductive polymer, polymer resin wire containing a conductive polymer.

The method of claim 3,
The metal wire is a heating element selected from a wire consisting of gold, platinum, palladium, copper, aluminum, tin, iron, nickel and mixtures thereof.

The method according to claim 1 or 2,
The heating unit or the conductive layer is a heating element formed of a conductive material or a mixture of a conductive material and a binder.

The method of claim 5,
The conductive material is a heating element selected from the group consisting of a conductive polymer, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron, nickel and mixtures thereof.

The method according to claim 3 or 6,
The conductive polymer is selected from the group consisting of polyaniline, polypyrrole, polythiophene, and mixtures thereof.

The method of claim 5,
The binder is a heating element selected from the group consisting of polyurethane resin, acrylic resin, silicone resin, melamine resin, epoxy resin and mixtures thereof.

The method of claim 8,
The binder is exothermic fabric is water dispersible polyurethane.

The method of claim 1,
The polymer resin of the insulating layer is a heating element selected from the group consisting of polyurethane resin, acrylic resin, silicone resin, polyester resin, PVC resin, polytetrafluoroethylene (PTFE) resin and mixtures thereof.

In the method of manufacturing a heat generating fabric containing a conductive yarn,
A fabric layer forming step of manufacturing a fabric from yarns and conductive yarns made of synthetic fibers, recycled fibers or natural fibers, such that the conductive yarns have a predesigned pattern;
A heating part forming step of forming a pre-designed pattern of lines or surfaces such that some or all of the conductive yarns are in contact with the top of the fabric layer; And
An insulating layer forming step of coating, printing or laminating a polymer resin on the heating unit;
Method for producing a exothermic fabric comprising a.

The method of claim 11,
The method of manufacturing a heat generating fabric further comprises the step of forming a conductive layer on top of the fabric layer.