KR20190021505A - A stomach band for fomentation - Google Patents

Abstract

The present invention relates to a heating abdominal band which comprises: a heating pad for generating heat by applied power; and an outer cover surrounding the heating pad. The heating abdominal band is configured to be worn on an abdomen or a waist. According to an embodiment of the present invention, the heating abdominal band comprises a heating pad and an outer cover surrounding the heating pad and is configured to be worn on an abdomen or a waist, wherein the heating pad includes a heating layer formed by electrospinning a radiating material including a metal nano-material on at least a part of a substrate. According to the present invention, it is possible to provide a heating abdominal band which has improved flexibility, is thin and lightweight, and generates heat uniformly throughout an overall area of the heating pad by escaping from the shape of a conventional abdominal band including a heating thin plate or a heating coil. Also, it is possible to provide a heating abdominal band which has improved efficiency of electric power consumption by configuring a heating layer including a nano-heating fiber and by including a heat insulation layer covering the heating layer.

Description

A stomach band for fomentation}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heating and heating bag, and more particularly, to a heating bag including a heating pad that generates heat by an applied power source and an envelope that surrounds the heating pad, and is configured to be worn on the abdomen or waist.

In general, modern people have a lot of time sitting on their chairs, while the amount of exercise is much lowered, which often causes back pain. In such cases, the symptoms are improved through the use of rehabilitation exercises, the use of ancillary equipment such as a bag, and pumice treatment.

The abdomen is configured to wrap around the waist and center it on the lumbar spine to strengthen the supporting capacity of the waist. In recent years, such as a fever in addition to the fever function, Poultice bags) have been used.

Such a heating bag is configured such that a surface heating element is disposed at the waist portion where the central nerves of the human body are most formed, and heat emitted from the heating element is transmitted to the body. As a heating element, a hot pack containing powder powder to be oxidized in air, a hot water pack configured to inject hot water, or the like is used, and a heating sheet including a thin metal plate or a heating coil which generates heat by power supply is often used.

1 is a perspective view schematically showing a conventional heating bag.

Referring to FIG. 1, a conventional heat-generating bag 10 includes a heat-generating coil 2 disposed on one surface of an endocard sheet 1 in a jig jig shape.

The heat generating coil (2) is formed by covering an electric wire formed of a metal material such as copper or iron with an insulating film. When the power supply device such as a battery is connected, heat is generated due to an electrothermal reaction. There is this easy side. In addition, the heat generating coil 2 has an advantage in that it can be easily constituted by a desired heat generation pattern, that is, a jig jig pattern in Fig. 1, in comparison with a heat generating body such as a metal thin plate.

However, due to the characteristics of the bag 10, the user is often folded or folded when stored or worn. When the heating coil 2 is used to form the heating bag, there is a disadvantage that the durability is poor depending on the operation of the user, have. Further, since the heat generating coil 2 generates heat only in a local portion where electricity flows, it is difficult to expect uniform heat generation over a large area.

On the other hand, there is a method of disposing coils closely in order to generate heat in a uniform area by using a heat generating coil. When the heat generating coils are closely arranged, the weight of the entire bag is inevitably increased. Paradoxically, a situation occurs in which the back is given to the waist, although the back is to wear the back to relieve the pain.

1. Korean Patent Registration No. 10-1319579 (title of the invention: bag for poultice) 2. Korean Patent Registration No. 10-1684794 (entitled "Thermal Bags Using Conductive Fever")

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a heating bag which is constructed to be worn on the abdomen or waist, and which has improved flexibility compared to a conventional heating element and includes a thin and light- .

Another object of the present invention is to provide a heat generating bag which is uniformly heated over the entire area of the heat generating pad but has an increased power consumption efficiency.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a heating pad including a heating pad and an outer covering surrounding the heating pad, the heating pad being configured to be worn on the abdomen or waist, And a heating layer formed by electrospinning a spinning material containing a metal nanomaterial in at least a part of the region of the substrate.

According to another aspect of the present invention, the heating layer may be configured to be electrically connected at a point where a plurality of nano heat generating fibers formed by electrospinning the radiating material intersect with each other to form a network.

According to another aspect of the present invention, the metal nanomaterial may be silver nanoparticles.

According to still another aspect of the present invention, the heating pad includes: an electrode electrically connected to the heating layer, for supplying power from the power supply unit to the heating layer; and a protection layer formed to cover the heating layer and the electrode, As shown in FIG.

According to another aspect of the present invention, the heat generating pad may further include a heat insulating layer disposed between the heat generating layer and the passivation layer and preventing loss of heat emitted from the heat generating layer.

According to another aspect of the present invention, when a voltage of 1 V to 10 V is supplied to the heating layer, the density of the nano-heating fiber may be determined so that the heating pad generates heat in a temperature range of 20 ° C to 60 ° C.

According to another aspect of the present invention, the nano-calorific fiber may be formed on the substrate so as to occupy 0.2% to 20% of the area of the heating layer.

According to another aspect of the present invention, the heating layer may be formed by co-electrospinning the radiating material.

According to the heating bag of the present invention, it is possible to provide a heating bag which is improved in flexibility and is uniformly heated over the entire area of the heating pad, thin and light, by removing from the form of a conventional heating bag including a heating pad or a heating coil have.

In addition, according to the heating band of the present invention, a heat generating layer including nano heat generating fibers is formed, and a heat insulating layer covering the heat generating layer is included, thereby providing a heat generating bag having increased power consumption efficiency.

1 is a perspective view schematically showing a conventional heating bag.
FIG. 2 is a perspective view schematically showing a heat-generating bag according to an embodiment of the present invention. FIG.
Fig. 3 is an exploded perspective view schematically showing the configuration of each of the heating bibs of Fig. 2; Fig.
FIG. 4 is a schematic cross-sectional view illustrating a structure of a heat generating pad included in a heat-generating bag according to the present invention.
5 is a perspective view schematically showing a heat generating layer and nano heat generating fibers included therein.
6 is a block diagram schematically showing an electrospinning device for producing nano-calorific fiber and a method for producing nano-calorific fiber using the device.
7 is a cross-sectional view schematically showing the shape of a nozzle that can be used in the electrospinning apparatus of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Like reference numerals refer to like elements throughout the specification.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.

Hereinafter, a heating bag according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4 attached hereto.

1. Composition of heating bag

FIG. 2 is a perspective view schematically showing a heat-generating bag according to an embodiment of the present invention, FIG. 3 is an exploded perspective view schematically showing each configuration of the heat-generating bag shown in FIG. 2, FIG. 2 is a cross-sectional view schematically showing the structure of a heating pad included in a heating bag of FIG.

2 and 3, the heating bag 1000 of the present invention is configured to be worn on the abdomen or waist and includes a heating pad 100, a cover 200 surrounding the heating pad 100, and a heating pad 100 (Not shown).

The heating pad 100 is configured to generate heat by an applied power source.

4, the heating pad 100 includes a substrate 110, a heat generating layer 120 formed on one surface of the substrate 110, an electrode 130 electrically connected to the heat generating layer 120, 120). ≪ / RTI >

The base material 110 serves to support the heat-generating layer 120, which is a place where the heat-generating layer 120 is formed.

The substrate 110 may be formed of a synthetic resin film, natural fiber, glass fiber, synthetic fiber, synthetic leather, natural leather, or a combination thereof. As the synthetic resin film, a thermoplastic polyurethane (TPU) or a polyethylene terephthalate (PET) film may be used.

In addition, the substrate 110 is not limited to the above-described materials as long as it has heat resistance capable of stably holding heat generated in the heat generating layer 120 and insulating property for electrically insulating the heat generating layer 120 from the outside, It is needless to say that a known substrate used in forming the heat generating sheet may be used.

The heating layer 120 is a layer that generates heat by electrical resistance and is formed on one surface of the substrate 110 including a plurality of nano heat generating fibers 121. Here, the nano-calorific fibers 121 are formed by electrospinning a spinning material containing a metal nanomaterial in at least a part of the region of the base material 100.

The nano-calorific fibers 121 formed in an electrospinning manner and the heat generating layer 120 including the nano-calorific fibers 121 can be stably bound to one surface of the substrate 110. Thus, the heat generating pad 100 of the present invention can have improved flexibility and electrical stability than a heat generating pad comprising a heat generating layer formed of a conventional heat generating thin plate or a heat generating coil.

The details of the nano-calorific fiber 121 formed in an electrospinning manner and the heat-generating layer 120 including the nano-calorific fiber 121 will be described later with reference to Figs. 5 to 7.

The heating pad 100 includes an electrode 130 electrically connected to the heat generating layer 120 and supplying power from the power source device 300 to be described later to the heat generating layer 120.

The electrodes 130 are formed at both ends of the heating pad 100 and are configured to supply power to the heating layer 120 formed over the entire area of the heating pad 100.

The electrode 130 may be formed in such a manner that the metal ink of the substrate 110 is screen-printed. As the metal ink, silver (Ag) or copper (Cu) ink may be used, but it goes without saying that the electrode 130 may be formed of various metal materials. The electrode 130 may be formed before the heating layer 120 is formed in an electrospinning manner on the substrate 110 or may be formed after the heating layer 120 is formed. If the electrode 130 and the heating layer 120 are electrically connected to each other, the order in which the electrodes 130 are formed in the present invention is not particularly limited.

The heating pad 100 includes a heating layer 120 and a protective layer 140 formed to cover the electrode 130. [

The protective layer 140 prevents moisture permeation to the heating layer 120 and prevents oxidation of the nano heating fiber 121 of the heating layer 120. The protective layer 140 is configured to electrically isolate the heat generating layer 120 from the outside.

The protective layer 140 may be formed of a thermoplastic polyurethane (TPU) material. However, it should be understood that the protective layer 140 may be formed of a variety of known synthetic resin materials.

The protective layer 140 may be formed to cover the entirety of the heating layer 120 and the electrode 130. The synthetic resin of the liquid type may be applied so as to cover the heating layer 120 and the electrode 130 and the film type synthetic resin may be applied to the heating layer 120 and the electrodes 130 by thermocompression using a high- As shown in Fig.

The heat generating pad 100 may further include a heat insulating layer 150 positioned between the heat generating layer 120 and the passivation layer 140 and preventing loss of heat emitted from the heat generating layer 120.

The heat insulating layer 150 may be formed of a heat insulating material formed by compressing glass fiber or the like. In addition, it is a matter of course that a known material may be employed as long as the material is excellent in heat resistance and fire resistance.

Referring again to FIGS. 2 and 3, the heating bag 1000 includes a covering 200 surrounding the heating pad 100. The envelope 200 is elongated so that the wearer can wear it around the abdomen or waist.

For example, the envelope 200 may be configured such that the same envelope member is coupled to the front and back sides as shown in FIG. 3, and the heating pad 100 is included between the front and rear envelope members. However, the present invention is not limited to this. The envelope 200 may be configured such that a pouch for inserting the heat-generating pad is formed in the sheath member and the heat-generating pad 100 is inserted into the pouch, The heating pad 100 may be included between the front and rear heating elements 100 and the front and rear heating elements 100 and 200, respectively.

The envelope 200 is formed such that when the user wears the heating belt 1000 of the present invention around the abdomen or waist, both ends 201a and 201b are connected to each other. At this time, the connection members 210a and 210b may be formed at connection points of both ends of the outer casing 200.

As the connecting members 210a and 210b, a Velcro member (female Velcro member and male Velcro member) may be used.

However, it is needless to say that the connecting members 210a and 210b may be formed of known connecting members such as buttons, buttonholes, snap buttons, hooks, grooves, and zippers.

On the other hand, the outer cover 200 may be formed of a cotton, polyester, rayon material, far infrared material, or the like, or may be formed of a stretchable nylon material. However, the present invention is not limited to this, and the envelope 200 may be made of a conventional envelope material used for a general bag.

The heating bag 1000 includes a power supply 300 that supplies power to the heating pad 100. The power supply device 300 is configured to be electrically connected to the electrode 130 to supply electric power to the heat generating layer 120.

The power supply unit 300 includes a battery 310 for supplying power and a wire 320 connected to one end of the electrode 130 and the battery 310. The core wire of the wire 320 having the one side uncovered is connected to one end of the electrode 130 and the battery 310 so that the nano heat of the heating layer 120 from the battery 310 to the electrode 130, So that power can be supplied to the fiber 121.

It is needless to say that the battery 310 and the electric wire 320 are not specifically limited in the present invention, and a known configuration can be employed.

The power supply device 300 for supplying electric power to the heat generating layer 120 is inconvenient to the user's activity because the heating bag 1000 of the present invention should consider the convenience of activity even when the user wears around the body. It is preferable to arrange such that it does not give a hint. Therefore, pouches 220a and 220b into which the power supply device 300 is inserted may be formed on the outer casing 200. [

For example, when the user wears the heating bag 1000 around his or her body, a wire pocket 220a is formed so that the electric wire 320 is arranged and housed in the housing member of the surface of the user's body, A battery pocket 220b formed to accommodate the battery 310 can be formed. At this time, the wire pocket and the battery pocket may be configured to have holes that pass through each other so that the electric wire 200 passes through the hole.

However, the accommodating method of the power supply apparatus 300 is an exemplary one, and the power supply apparatus 300 may be arranged so as not to inconvenience a user's operation by various known methods.

Meanwhile, the heating bag 1000 of the present invention may include a temperature sensor and a temperature controller (not shown).

The heating bag 1000 may include a temperature sensor to sense the temperature of the heating layer 120 or the heating pad 100. The temperature measured by the temperature sensor can be utilized to appropriately control the operation of the heating layer 120. [

The temperature sensor is preferably a thermocouple which is simple in construction, low in cost, and excellent in temperature measurement effect even at a high temperature. The temperature sensor may be various known temperature sensors such as a bimetal, a thermistor, etc., and the temperature sensor may be connected to a temperature sensor by a separate electric wire, .

Further, the temperature sensor may be connected to a temperature control device that controls the heat generation of the heating layer 120 according to the sensed temperature. The temperature control device can be driven in such a manner that it is turned OFF when the set temperature is reached and turned ON when the temperature is lowered, that is, the power supply to the heating layer 120 is cut off.

However, the temperature sensor and the temperature control device are not limited to those described above. It goes without saying that the exothermic temperature of the exothermic layer 120 can be controlled in various ways known to those skilled in the art.

Hereinafter, the structure of the nano-exothermic fiber forming the exothermic layer of the heat-generating pad and the method of producing the nano-exothermic fiber will be described in detail with reference to FIGS. 5 to 7 attached hereto. Here, for convenience of description, it is needless to say that FIGS. 2 to 4 can be referred to together.

2. On the exothermic layer  Composition of nano-exothermic fibers included

5 is a perspective view schematically showing a heat generating layer 120 and nano heat generating fibers 121 (hereinafter, referred to as 'F') included therein.

Referring to FIG. 5, the heat generating layer is formed by including a plurality of nano heat generating fibers F.

The nano-exothermic fibers F are electrically connected to each other at a point N where they cross each other, so that a plurality of nano-calorific fibers F can form a network and current can flow.

The nano-exothermic fibers (F) may be formed to have a diameter ranging from about 50 nm to 1 mu m and a length ranging from several mu m to several hundred mu m.

Due to the characteristics of such a fine and flexible nano-calorific fiber F, the heat-generating layer 120 formed by including the nano-calorific fibers F is not easily damaged by an external force such as folding or bending, thereby securing electrical safety.

At this time, the density of the formed nano-calorific fibers F may be determined so that the heating layer 120 generates heat in a temperature range of 20 ° C to 60 ° C when a voltage of 1V to 10V is supplied to the heating layer 120. In order to configure the heat generating layer 120 to satisfy such a performance condition, the nano heat generating fibers F may be formed to occupy 0.2% to 20% of the area of the heat generating layer 120.

3. Manufacturing method of nanofiber fiber

6 is a block diagram schematically showing an electrospinning device for producing nano-calorific fiber and a method for producing nano-calorific fiber using the device, and Fig. 7 is a cross-sectional view of a nozzle used for the electrospinning device of Fig. 6 Sectional view schematically showing the shape of the semiconductor device.

Electrospinning device

6, the electrospinning device 1 includes a spinning solution tank 10, a spinning nozzle 20, an external power source 30, and a collector substrate 40.

The spinning solution tank 10 stores the spinning solution. The spinning solution tank 10 can pressurize the spinning solution using a built-in pump (not shown) to provide the spinning solution to the spinning nozzle 20.

The spinning nozzle 20 receives the spinning solution from the spinning solution tank 10 and emits the spinning solution. The spinning nozzle 20 emits the spinning solution by the voltage applied by the external power source 30 after the spinning solution is pressurized by the pump to fill the nozzle tube therein.

Here, as the spinning nozzle 20, a single nozzle 20a as shown in FIG. 7 (a) may be used, or a double nozzle 20b as shown in FIG. 7 (b) may be used.

Two types of spinning nozzles can be selectively used depending on the structure of the nano-exothermic fibers (F) included in the heat generating layer of the present invention. The manufacturing process of the nano-exothermic fiber (F) using the single nozzle (20a) or the double nozzle (20b) and the structure of the produced nano-calorific fiber (F) will be described later.

The external power supply 30 provides a voltage such that the spinning solution is radiated to the spinning nozzle 20. The voltage may vary depending on the type of spinning solution and the amount of spinning. For example from about 100 V to about 30000 V, and can be DC or alternating current. The voltage applied by the external power supply 30 can radiate the spinning solution filled in the spinning nozzle 20. [

The collector substrate 40 is located below the spinneret and accommodates the spinning solution to be emitted. Collector substrate 40 may be grounded to have a voltage of 0 V, which is the ground voltage, or collector substrate 40 may have a voltage of opposite polarity to spinneret 20. Since the spinning nozzle 20 is charged to a positive voltage or a negative voltage by the external power source 30 and thus the spinning solution is also charged, a voltage difference occurs between the collector substrate 40 having a grounded or opposite polarity voltage .

When a voltage is applied to the spinning nozzle 20 by the external power source 30, the spinning solution at the end of the spinning nozzle 20 is formed into a conical shape like a Taylor cone. At this time, an electric field in the range of about 50000 V / m to about 150000 V / m may be formed between the spinning nozzle 20 and the spinning solution. Due to the voltage difference, the spinning solution can be radiated to the collector substrate 40 and received.

By controlling the flow rate of the spinning solution and the difference in voltage between the spinneret 20 and the collector substrate 40, the diameter and length of the nano-calorific fiber structure 50 accommodated in the collector substrate 40 Can be controlled. For example, the nano-calorific fiber structure 50 emitted from the electrospinning device 1 described above may have a diameter in the range of about 50 nm to 1 μm and a length in the range of about several μm to several hundred μm.

Meanwhile, the positional relationship between the spinneret 20 and the collector substrate 40 in FIG. 6 is exemplary, and the technical idea of the present invention is not limited thereto.

For example, the collector substrate 40 may be positioned above the spinneret 20 and spinning solution may be radiated upwardly from the spinneret 20, and the collector substrate 40 may be spin- And the spinning solution radiated from the spinning nozzle 20 may be radiated in the horizontal direction. The electrospinning method according to various arranging methods of the spinning nozzle 20 and the collector substrate 40 can be included in the technical idea of the present invention. The collector substrate 40 is not limited to the planar substrate. However, it is needless to say that a drum-type collector that rotates about the center axis of the collector substrate 40 may be used.

Further, the spinning nozzle 20 can spin the spinning solution in a linear form, for example, in a wire form or a rod form (i.e., a spinning mode). On the other hand, the spinning nozzle 20 can spin the spinning solution in the form of a spray (i.e., a spray mode). The spinning solution has a viscosity of the solution, a weight ratio of the solute in the solution, And the molecular weight of the solvent, and may be radiated in different forms depending on the magnitude of the applied voltage. For example, if the spinning solution has a relatively high viscosity or a relative The electrospinning process can be performed by the spinning mode and the electrospinning process is performed by the spray mode when the spinning solution has a relatively low viscosity or a relatively high voltage is applied .

The spinning mode and the spraying mode can be performed in combination in the production of the nano-calorific fiber (F), and will be described in more detail in the following description of a method of manufacturing a heating layer according to a single spinning coating process.

Electrospun material

The nano-exothermic fibers forming the heat generating layer included in the present invention are made of nanomaterials and high molecular materials.

The nanomaterial may comprise a conductive material, for example, including a metal nanomaterial or may comprise a carbon nanomaterial.

Specifically, the nanomaterial is preferably a silver (Ag) nanomaterial. However, the present invention is not limited thereto. The nanomaterial may be at least one selected from the group consisting of Cu, Co, Sc, Ti, Cr, Mn, (Al), ruthenium (Ru), rhodium (Rh), palladium (Pd), aluminum (Al), techenium (Tc) , Cadmium (Cd), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum , Lanthanide, actinoid, silicon, germanium, tin, arsenic, antimony, bismuth, gallium, And indium (In).

Nanomaterials can be composed of materials having a variety of nanoscopic shapes and include, for example, nanoparticles, nanowires, nanotubes, nanorods, nanowalls, (nanobelts), and nanorings (nanorings).

These nanomaterials can be composed of solutions of nanomaterials dissolved in a soluble solvent. The soluble solvent may be selected from the group consisting of water, alcohols and mixtures thereof, and examples thereof include water, methanol, ethanol, propanol, isopropanol, butanol, acetone, tetrahydrofuran, toluene or dimethylformamide, dimethylsulfoxide, N, N-dimethylformamide, 1-methyl-2-pyrrolidone, trimethylphosphate, and mixtures thereof.

However, the nanomaterial and the nanomaterial solution described above are illustrative, and the technical idea of the present invention is not limited thereto.

The polymer nanofibers formed from the polymer material and the polymer material may include various high molecular materials.

For example, the polymeric material may be selected from the group consisting of polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), polymethyl methacrylate (PMMA), polydimethylsiloxane (PDMS), polyurethane, polyether urethane, cellulose acetate, cellulose (PA), polyacrylonitrile (PAN), polyperfuryl alcohol (PPFA), polystyrene, polyethylene oxide (PEO), poly (methyl methacrylate) And may include at least one selected from the group consisting of propylene oxide (PPO), polycarbonate (PC), polyvinyl chloride (PVC), polycaprolactone, polyvinyl fluoride and polyamide.

The polymer material may also include a copolymer of the above-mentioned materials, and examples thereof include a polyurethane copolymer, a polyacrylic copolymer, a polyvinyl acetate copolymer, a polystyrene copolymer, a polyethylene oxide copolymer, a polypropylene oxide copolymer , And a polyvinylidene fluoride copolymer.

Such a polymer substance may be composed of a solution of a polymer substance dissolved in a soluble solvent. The soluble solvent may be selected from the group consisting of water, alcohols and mixtures thereof, and examples thereof include water, methanol, ethanol, propanol, isopropanol, butanol, acetone, tetrahydrofuran, toluene or dimethylformamide, dimethylsulfoxide, N, N-dimethylformamide, 1-methyl-2-pyrrolidone, trimethylphosphate, and mixtures thereof.

However, the above-mentioned polymer material and polymer material solution are illustrative, and the technical idea of the present invention is not limited thereto.

Manufacturing process of nanofiber fibers by single spinning process

The specific process in which single emission is performed using the single nozzle 20a of Fig. 7 (a) is as follows.

First, a substrate for collecting the nano-calorific fiber structure 50 radiated from the single nozzle 20a is disposed. The substrate may be the collector substrate 40 of FIG. 6 or a separate substrate disposed on the collector substrate 40. In the case of a substrate separate from the collector substrate 40, the substrate may include the conductive material and have the same voltage state as the collector substrate.

The spinning solution supplied from the spinning solution tank 10 is electrospun onto the substrate.

The spinning solution used in the single spinning process may be the above-described nanomaterial solution or a mixed solution in which the solution of the polymer material is mixed with the nanomaterial solution described above. The spinning solution may be in a gel state.

The voltage applied during electrospinning may vary depending on, for example, the type of the nanomaterial, the type of the polymer material, the type of the substrate, the process environment, and the like, and may range, for example, from about 100 V to about 30,000 V.

The nano-calorific fiber structure 50 formed by electrospinning can be arranged to form a one-dimensional, two-dimensional or three-dimensional network structure that is formed on the substrate and overlapped and connected to each other. For example, the nano-calorific fiber structure 50 may form a one-dimensional network structure in which a plurality of linear-shaped structures are connected in parallel to each other and connected in a linear shape, and a plurality of linear- Dimensional network structure in which a plurality of linear structures are overlapped and connected to each other with a predetermined angle so as to form a three dimensional network A structure can be formed. Further, the nano-calorific fiber structure 50 may have a shape having a predetermined pattern, for example, a mesh shape, or may be arranged to have a web shape.

Next, an annealing process may be selectively performed to fix the deformation of the inside of the nano-calorific fiber structure 50 arranged on the substrate and to uniformly arrange the materials. The annealing can be performed by appropriately heating the nano-calorific fiber structure 50 in a predetermined temperature range by a heat treatment method in which the material is heated to a predetermined temperature and slowly cooled.

By increasing the bonding force between the nanomaterials included in the nano-calorific fiber structure 50 by the annealing process, the nano-calorific fiber structure 50 can be formed of the nano-calorific fiber F shown in Fig.

The annealing may be performed in an atmospheric air atmosphere, an inert atmosphere containing argon gas or nitrogen gas, or a reducing atmosphere containing hydrogen gas. The annealing process may be omitted as an option or may be performed stepwise several times.

Fabrication of nano-exothermic fiber by single spinning coating process

A specific process in which a single spin coating is performed using the single nozzle 20a of Fig. 7 (a) is as follows.

First, a substrate for collecting the nano-calorific fiber structure 50 radiated from the single nozzle 20a is disposed. The step of disposing the substrate is the same as in the above-described " method for manufacturing a nano-exothermic fiber according to a single spinning process "

The spinning solution supplied from the spinning solution tank 10 is electrospun onto the substrate.

The spinning solution used in the single spinning coating process may be a solution of a selected one of the nanomaterial solution and the polymer solution described above. The spinning solution may be in a gel state.

As described above in the 'method of manufacturing a nano-exothermic fiber according to a single spinning process,' the voltage applied during electrospinning can be changed according to the type of the nanomaterial, the type of the polymer material, the type of the substrate, Such as from about 100 V to about 30,000 V, for example.

Next, a coating layer is formed on the radiated nanofibers so as to surround at least a part of the radiated nanofibers by spray-spinning the nanofibers solution and another solution in the solution of the polymer solution and the electrospun solution.

As described above, since the spinning mode or the spray mode can be performed according to the magnitude of the voltage to be applied, depending on the viscosity of the spinning solution, the physical properties such as the solute and the kind of solution using the electrospinning device, By forming the coating layer in spray mode on the spun nanofibers, a dual nano-calorific fiber structure 50 configured to form different layers of nanomaterials and polymeric materials can be produced.

For example, the polymer fiber including the polymer material may be located on the inner side and the coating layer including the nanomaterial may be located on the outer side of the polymer fiber. Alternatively, the nanofiber including the nanomaterial may be located on the inner side A coating layer containing a polymer material may be formed in a double structure in which the coating layer is surrounded and surrounded by the nanofibers. Here, the coating layer may be formed to completely surround the radiated nanofibers, or may be formed so as to surround a part of the nanofibers emitted so that a part of the radiated nanofibers is exposed to the outside.

The nano-emissive fibrous structure 50 formed by the single spinning coating may be arranged to form a one-dimensional, two-dimensional or three-dimensional network structure formed by overlapping and connecting to each other on the substrate. By the annealing process described above, The exothermic fiber structure 50 may be formed of a nano-exothermic fiber F having a length in the range of about several micrometers to several hundreds of micrometers.

On the other hand, a sintering process may be performed to selectively remove the polymer material in the nano-calorific fiber structure 50 of the double layer. When the polymer material is removed by the sintering process, rod-type or hollow-type nano-calorific fibers can be produced.

That is, when the nano-calorific fiber structure 50 is formed to have a double-layer structure such that the polymer material surrounds the nanomaterial, when the polymer material is sintered and removed, finally the nano-calorific fibers F are formed do. On the other hand, when the nano-calorific fiber structure 50 is formed in a bilayer structure such that the nanomaterial is surrounded by the polymer material, when the polymer material is removed under sintering, the nano-calorific fiber F is finally formed in a rod shape.

The sintering method for removing the polymer material may be chemical sintering, light sintering and heat sintering.

The chemical sintering means sintering in such a manner that the polymer material is melted by impregnating a nano-exothermic fiber structure (50) in which a polymer material and a nanomaterial form a double layer in an organic solvent capable of melting a polymer material.

Here, the organic solvent may include all kinds of solvents capable of dissolving the polymer material. The organic solvent may be an alkane such as hexane, an aromatic such as toluene, an ether such as diethyl ether, an alkyl halide such as chloroform, an ester, an aldehyde, a ketone, an amine, an alcohol, an amide, And water. The organic solvent is, for example, acetone, fluoroalkane, pentane, hexane, 2,2,4-tricetylpentane, decane, cyclohexane, cyclopentane, diisobutylene, 1-pentene, carbon disulfide, carbon tetrachloride Chlorobutane, diisopropyl ether, 1-chloropropane, 2-chloropropane, toluene, trichlorobenzene, benzene, bromoethane, diethyl ether, diethyl sulfide, chloroform, But are not limited to, dichloromethane, 4-methyl-2-propanone, tetrahydrofuran, 1,2-dichloroethane, , At least one selected from the group consisting of dimethylsulfoxide, aniline, diethylamine, nitromethane, acetonitrile, pyridine, 2-butoxyethanol, 1-propanol, 2-propanol, ethanol, methanol, ethylene glycol and acetic acid One can be included.

The light sintering is performed by irradiating the light of a desired wavelength range (or the entire area) with a constant energy for 1 second to several seconds by using a xenon lamp or the like, thereby removing the polymer material for a short time using light and forming a network of nanomaterials .

In the photo-sintering process, light pulse, on-time, turn-off time, voltage and wavelength range are important control variables.

The light sintering may be performed within a few seconds, and thus may be repeatedly performed as needed.

The heat sintering means sintering in such a way that the polymer material is melted by heating the nano-exothermic fiber to a temperature range above the melting point of the polymer material.

For example, it is possible to heat-sinter at a high temperature of 500 ° C or higher to melt the polymer material and allow the nanomaterials to form networking with each other. However, when a general glass substrate or a plastic substrate having a low melting point is used, a process of heat sintering at a high temperature can not be used. Therefore, it is necessary to pay attention to the selection of the substrate when employing the heat sintering method.

Fabrication of nano-exothermic fibers by dual spinning process

The specific process in which the double spinning is performed using the double nozzle 20b of FIG. 7 (b) is as follows.

The dual nozzle 20b may include a first nozzle 21 for emitting a first radiation material and a second nozzle 22 for emitting a second radiation material. The first nozzle 21 is connected to a first tank 11 containing a first radiation material and the second nozzle 22 is connected to a second tank 12 containing a second radiation material. The double nozzles 20b allow the first and second radiation materials to be radiated simultaneously without mixing.

The double nozzle 20b includes a first nozzle 21 and a second nozzle 22 formed so as to surround the first nozzle 21 so that the distance between the first nozzle 21 and the second nozzle 22 Axis are coaxial double structure nozzles configured to coincide with each other. The double nozzle 20b of the present invention is not limited to the coaxial double nozzle but may be a double nozzle 20b in which the first nozzle 21 and the second nozzle 22 are arranged in parallel, It is needless to say that the nozzle can be changed into a double nozzle of the type.

First, a substrate for collecting the nano-calorific fiber structure 50 radiated from the double nozzle 20b is disposed. The step of disposing the substrate is the same as in the above-described " method for manufacturing a nano-exothermic fiber according to a single spinning process "

The first and second spinning solutions supplied from the first tank 11 and the second tank 12 are doubly electrospun on the substrate.

The first spinning solution and the second spinning solution may be simultaneously spinning and have the same spinning length. Also, the second spinning solution may be radiated by surrounding the outer side of the first spinning solution, and the first spinning solution may be located inside the second spinning solution. Accordingly, the nano-calorific fiber structure 50 accommodated in the substrate may have a bilayer structure in which the first spinning solution is located inside and the second spinning solution surrounds the outer side of the first spinning solution.

Here, the first spinning solution may be a nanomaterial solution, the second spinning solution may be a polymer material solution, or the second spinning solution may be a polymer material solution and the second spinning solution may be a nanomaterial solution. As described above, the types of the first spinning solution and the second spinning solution may be selected depending on whether the nano-exothermic fiber to be manufactured according to the electrospinning process of the present invention is a rod type or a hollow type. .

In order to easily form the coaxial double layer nano-calorific fiber structure 50, it is preferable that the first spinning solution and the second spinning solution should not be mixed with each other, so that spinning is performed under the following conditions.

The injection and spinning speed of the second spinning solution on the outside may be equal to or larger than the injection and spinning speed of the first spinning solution on the inside. At least one of the first spinning solution and the second spinning solution needs to have conductivity, and the vapor pressures of the first spinning solution and the second spinning solution should be the same or similar. In addition, the viscosity of the first spinning solution must be equal to or greater than the viscosity of the second spinning solution.

For example, in the double spinning process of the present invention, the injection and spinning rate of the first spinning solution is in the range of 0.1 ml / hour to 1.5 ml / hour, the injection and spinning rate of the second spinning solution is in the range of 1.5 ml / hour to 3.5 ml / hour Lt; / RTI > However, such an injection rate is an exemplary one, and the technical idea of the present invention is not limited thereto.

According to the above-described 'method for producing a nano-exothermic fiber according to the double spinning process, the nano-calorific fiber structure 50 is formed in a double layer structure so that the polymer material surrounds the nanomaterial or the nanomaterial surrounds the polymer material. The nano-heat-generating fiber structure 50 may be arranged so as to form a one-dimensional, two-dimensional or three-dimensional network structure formed by being overlapped and connected to each other on the substrate. By the annealing process, (50) may be formed of nano-exothermic fibers (F) having a length in the range of about several micrometers to several hundreds of micrometers.

The thus formed double-layered nano-calorific fiber structure 50 may be formed of a rod-type or hollow-type nano-calorific fiber F by selectively sintering the polymer material. The sintering process is the same as the sintering process according to the 'method for manufacturing nano-exothermic fiber according to the single spinning coating process' described above, so a duplicated description will be omitted.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1000 ... Fever bag
100 ... Heating pad
110 ... materials
120 ... Heating layer
121 ... Nano-thermal fibers
130 ... electrode
140 ... Protective layer
150 ... Insulating layer
200 ... coat
201a, 201b ... End
210a, 210b ... Connecting member
220a, 220b ... pocket
300 ... Power supply
310 ... battery
320 ... wire
One … Electrospinning device
10 ... Spinning solution tank
11 ... The first tank
12 ... The second tank
20 ... Spinning nozzle
20a ... Single nozzle
20b ... Double nozzle
21 ... The first nozzle
22 ... The second nozzle
30 ... External Power
40 ... Collector substrate
50 ... Nano-heating fiber structure

Claims (8)

A heat generating pad which generates heat by an applied power source and an outer skin that surrounds the heat generating pad, and is configured to be wearable on the abdomen or the waist,
Wherein the heating pad comprises a heating layer formed by electrospinning a spinning material containing a metal nanomaterial in at least a part of a region of the base material. The method according to claim 1,
Wherein the heating layer is configured to be electrically connected at a point where a plurality of nano-calorific fibers formed by electrospinning the radiating material intersect with each other to form a network. The method according to claim 1,
Characterized in that the metal nanomaterial is silver nanoparticles. The method of claim 1, wherein
Wherein the heating pad further comprises an electrode electrically connected to the heating layer and supplying power from the power supply unit to the heating layer and a protective layer formed to cover the heating layer and the electrode. Fever bags. 5. The method of claim 4,
Wherein the heat generating pad further comprises a heat insulating layer located between the heat generating layer and the protective layer and preventing loss of heat emitted from the heat generating layer. The method according to claim 1,
Wherein a density of the nano-exothermic fibers is determined so that the heating pad generates heat in a temperature range of 20 ° C to 60 ° C when a voltage of 1V to 10V is supplied to the heating layer. The method according to claim 6,
Wherein the nano-exothermic fibers are formed on the substrate so as to occupy 0.2% to 20% of the area of the heat-generating layer. The method according to claim 1,
Wherein the heating layer is formed by co-electrospinning the radiating material.

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