KR20200076337A - Cooling sheet changing color by body temperature and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a cooling sheet whose color changes according to body temperature and a manufacturing method thereof.
The cooling sheet that changes color according to the body temperature according to the present invention includes a nonwoven fabric, a sheet pack attached on the nonwoven fabric, and a cooling gel sealed in the sheet pack, and the cooling gel changes color according to temperature changes.
By the above-described configuration, the present invention can be easily attached to the skin and cool the minute heat of the body at the same time, and at the same time, it is possible to easily grasp the optimal sheet desorption time and temperature change of the skin through color change of the cooling sheet.

Description

Cooling sheet that changes color according to body temperature and its manufacturing method{COOLING SHEET CHANGING COLOR BY BODY TEMPERATURE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a cooling sheet that changes color according to body temperature and a method for manufacturing the same, and more specifically, it is attached to the skin to cool the body's heat quickly and at the same time, the optimal sheet desorption time through the change of the color of the cooling sheet. And a cooling sheet whose color changes according to body temperature that can easily grasp the temperature change of the skin and a manufacturing method thereof.

In general, in the summer when the temperature is high, a pack capable of absorbing heat for cold compresses is used to cool the excessive heat from the outside or to relieve fractures or swelling during exercise or to lower the heat of the human body. An example of an endothermic pack having an endothermic action among the packs is described in Korean Patent Publication No. 10-2006-0079187, and the structure of the cold pack of this embodiment is as follows.

The cold pack comprises an enclosure, a powdered solute inside the enclosure, a liquid inside the enclosure, a membrane separating the powdered solute and the liquid, and when the membrane is ruptured, the liquid and the powdered solute are mixed to enclose the enclosure. An endothermic reaction that absorbs heat from the inside occurs. This has the advantage of being easy to use, but can be used as an endothermic pack.

In addition, although the same solution as above was used, an endothermic pack capable of being repeatedly used has been developed, and the endothermic reaction does not occur with only the solute and the solvent by embedding a solution and a heating element in which the solute and the solvent are integrated inside the pack on the pouch.

That is, in order to induce an endothermic reaction in the solution of the pack, the heating element is bent so that the solution causes a chemical reaction to absorb the heat while changing the phase from liquid to solid. The pack having the structure as described above has an advantage that can be repeatedly used by dissolving the inside of the pack, which has changed into a solid state, into a liquid by applying heat over a certain temperature to reuse after using heat generated while changing to a solid state.

A conventional cooling pack is a cooling method using an endothermic reaction that occurs when these components are mixed using a material having a large heat storage capacity as a cooling material. These endothermic materials are commonly used as cooling methods for the human body and food. However, this cooling method can be used only once or by using the endothermic reaction according to the mixing of the two substances when they are stored in a separate bag or in a state of being isolated from each other, or in a refrigerator or freezer before use. There is a discomfort that must be cooled.

Domestic registered patent No. 10-1122641 (registered on February 24, 2012) Domestic registered patent No. 10-1296427 (registered on August 07, 2013) Korean Patent Publication No. 10-2015-0057777 (released on May 28, 2015)

The present invention is a cooling sheet that changes color according to body temperature that is attached to the skin and quickly cools down the body's fever, and at the same time can easily grasp the optimal sheet desorption time and temperature change of the skin through color change of the cooling sheet, and It is to provide a manufacturing method.

Various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The cooling sheet that changes color according to the body temperature according to the present invention includes a nonwoven fabric, a sheet pack attached on the nonwoven fabric, and a cooling gel sealed in the sheet pack, and the cooling gel changes color according to temperature changes.

The cooling gel, after preparing a mixed solution of a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, a heat absorbing material and a crosslinking agent at a constant weight ratio, and after adding purified water, glycerin and a first color dye to the mixed solution and stirred By cooling, a first cooling gel is prepared, and after heating the first cooling gel, glycerin and a second color dye may be further mixed and then cooled.

The water-soluble ethylenically unsaturated monomer, the hydrophilic additive, the heat absorbing material and the crosslinking agent are 50 to 100 parts by weight of the water-soluble ethylenically unsaturated monomer, 10 to 20 parts by weight of the hydrophilic additive, 20 to 40 parts by weight of the heat absorbing material, and 2 to 6 parts by weight of the crosslinking agent, respectively. After mixing at a ratio to prepare a mixed solution, 80 to 120 parts by weight of purified water, 3 to 8 parts by weight of glycerin, and 3 to 8 parts by weight of the first color dye and 3 to 8 parts by weight of the mixed solution were added, and 33 to 37 The first cooling gel can be prepared by stirring at a temperature of ℃ for 30 to 60 minutes and then cooling to a temperature of 1 to 5°C.

The glycerin and the second color dye are added at a weight ratio of 3 to 8 parts by weight of glycerin and 3 to 8 parts by weight of the second color dye to 100 parts by weight of the first cooling gel, and then 30 to 60 at a temperature of 40 to 43°C. After stirring for a minute, a cooling gel can be prepared by cooling to a temperature of 1 to 5°C.

Specific details of other embodiments are included in the detailed description.

The cooling sheet manufactured according to the present invention can be attached to the skin to quickly cool the body's slight heat and at the same time, it is possible to easily grasp the optimal sheet desorption time and the temperature change of the skin through the color change of the cooling sheet.

It will be fully understood that embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

1 is a photograph showing a cooling sheet that changes color according to body temperature according to the present invention.
2 is a photograph showing a state in which the color is changed when the cooling sheet, which changes color according to the body temperature according to the present invention, is attached at a high temperature.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete and that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment for a cooling sheet that changes color according to body temperature.

1 is a picture showing a cooling sheet that changes color according to body temperature according to the present invention, and FIG. 2 is a picture showing a state in which the color is changed when a cooling sheet that changes color according to body temperature according to the present invention is attached at a high temperature.

1 and 2, the cooling sheet whose color changes according to body temperature according to the present invention includes a nonwoven fabric, a sheet pack attached on the nonwoven fabric, and a cooling gel sealed in the sheet pack.

The nonwoven fabric may include nonwoven fabrics of synthetic resin fibers such as nylon, polyethylene, polypropylene, polyester, and polyvinyl chloride, and nonwoven fabrics of natural fibers such as cotton, pulp fibers, hemp, wool, silk, and rayon. Among them, any one selected from the group consisting of nylon, polyethylene, polypropylene, and rayon is preferred in consideration of good texture, superimposition property with a non-permeable film, and ease of processing.

The sheet pack is attached to the nonwoven fabric, and the sheet pack is any one or more selected from the group consisting of synthetic resin films such as polyethylene, polypropylene, nylon, polyvinyl chloride, polyvinylidene chloride, polyisocyanate, and composite films thereof. Can be used.

In the present invention, the sheet pack is formed by being attached on the nonwoven fabric, and the sheet pack is attached by thermal fusion or dry lamination by an adhesive, and the sheet pack is fixed over the entire surface of the nonwoven fabric or partially. It can be fixed, the configuration for this can be easily modified by those of ordinary skill in the art.

The cooling gel is formed by being sealed on the sheet pack, and may be configured to change the color of the cooling gel according to the body temperature of a person who attaches the cooling sheet. That is, in the present invention, the cooling gel comprises a heat absorbing material and a color dye, thereby absorbing heat from the human body to cool the body temperature of the user who attaches the cooling sheet, and at the same time changing the color of the color dye to change the user's body temperature. It is easy to grasp.

In the present invention, the cooling gel may be prepared by the following manufacturing method.

First, in the present invention, the cooling gel is prepared by mixing a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an endothermic material, and a crosslinking agent in a mixed weight ratio, and then adding purified water, glycerin and a first color dye to the mixed solution. And stirred at a temperature of 33 to 37 ℃ for 30 to 60 minutes and then cooled to a temperature of 1 to 5 ℃ can be prepared as a first cooling gel in a gel state.

In addition, in the present invention, the purified water, glycerin and the first color dye are added in a weight ratio of 80 to 120 parts by weight of purified water, 3 to 8 parts by weight of glycerin and 3 to 8 parts by weight of the first color dye, based on 100 parts by weight of the mixed solution. can do.

Next, the cooling gel according to the present invention can be prepared by heating the first cooling gel and further mixing glycerin and the second color dye, followed by cooling.

In the present invention, the glycerin and the second color dye are added at a weight ratio of 3 to 8 parts by weight of glycerin and 3 to 8 parts by weight of the second color dye to 100 parts by weight of the first cooling gel and then at a temperature of 40 to 43°C. After stirring for 30 to 60 minutes, it can be prepared as a cooling gel in a gel state by cooling to a temperature of 1 to 5°C.

In addition, in the present invention, the first color dye and the second color dye may be conventionally known dyes, and the first color dye and the second color dye are composed of different colors to cool the cooling gel according to the present invention. When attached to a human body, color changes according to absorption of body temperature can be easily grasped.

Specifically, the water-soluble ethylenically unsaturated monomer may be a conventional water-soluble ethylenically unsaturated monomer used in the absorbent polymer, for example, (meth)acrylic acid, maleic anhydride, crotonic acid, itaconic acid, 2-acrylic acid Any one or more selected from the group consisting of monoethane sulfonic acid, 2-methacryloylethanesulfonic acid and 2-(meth)acryloylpropanesulfonic acid may be used.

In the present invention, the water-soluble ethylenically unsaturated monomer may include 50 to 100 parts by weight of the total content of the mixed solution consisting of a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an endothermic material, and a crosslinking agent, and the content of the water-soluble ethylenically unsaturated monomer is 50% by weight. If it is less than part, it is difficult to form a polymer, and when it is contained in excess of 100 parts by weight, monomers may be entangled with each other, which may cause problems in manufacturing.

As the hydrophilic additive, any one or more selected from the group consisting of sodium dodecyl sulfate, phosphate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, and sorbitan monooleate may be used.

In the present invention, the hydrophilic additive may include 10 to 20 parts by weight of the total content of the mixed solution consisting of a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an endothermic material, and a crosslinking agent. When the hydrophilic additive is used in less than 10 parts by weight, moisture If the absorption properties of the poor, and used in excess of 20 parts by weight, a problem may occur that the gel strength of the polymer to be produced is lowered.

The endothermic material is a material that causes an endothermic reaction in the cooling gel, for example, any one or more selected from the group consisting of ammonium nitrate, ammonium sulfate, acidic ammonium sulfate, ammonium phosphate, ammonium chloride and sodium nitrate can be used.

In the present invention, the heat absorbing material may include 20 to 40 parts by weight of the total content of the mixed solution consisting of a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an heat absorbing material, and a crosslinking agent. When the heat absorbing material is contained in less than 20 parts by weight, sufficient A problem that does not exhibit an endothermic action may occur, and when it is included in an amount exceeding 40 parts by weight, a problem in which color change of the cooling gel due to absorption of body temperature is not easy may occur.

The crosslinking agent is added to maintain the stable gel strength in the swollen state by absorbing the absorption rate and moisture, for example, the crosslinking agent is ethyleneoxy (meth)acrylate, polyethyleneoxy (meth)acrylate, Any one or more selected from the group consisting of propyleneoxy (meth)acrylate, glycerin diacrylate, glycerin triacrylate, trimethyrol triacrylate, and triallylamine may be used.

In the present invention, the crosslinking agent may include 2 to 6 parts by weight of the total content of the mixed solution consisting of a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an endothermic material, and a crosslinking agent. Since the polymer has excellent water absorption, the gel strength may be too weak, and when it is included in an amount exceeding 5 parts by weight, the gel strength is excellent but physical properties may be remarkably deteriorated.

Hereinafter, with reference to the accompanying drawings will be described in more detail with reference to the embodiment of the cooling sheet that changes color according to the body temperature according to the present invention.

<Example>

A cooling sheet as shown in FIG. 1 was prepared by attaching a sheet pack sealed with a cooling gel on a nonwoven fabric.

The cooling gel sealed in the sheet pack is first, 80 parts by weight of a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an endothermic material and a crosslinking agent, respectively 80 parts by weight of a water-soluble ethylenically unsaturated monomer, 15 parts by weight of a hydrophilic additive, 30 parts by weight of a heat absorbing material and 4 parts by weight of a crosslinking agent After preparing a mixed solution in a weight ratio of parts, 100 parts by weight of purified water, 5 parts by weight of glycerin, and 5 parts by weight of a first color dye having a purple color are added to the total of 100 parts by weight of the mixed solution, and a temperature of 33 to 37° C. After stirring for 50 minutes at 2 to 3 ℃ to prepare a first cooling gel in a gel state by cooling to a temperature.

Next, 5 parts by weight of glycerin and 5 parts by weight of a second color dye having a pink color with respect to 100 parts by weight of the first cooling gel were added thereto, and then stirred at a temperature of 40 to 43°C for 50 minutes, followed by a temperature of 2 to 4°C. By cooling, a gel-like cooling gel was prepared.

Here, maleic anhydride was used as the water-soluble ethylenically unsaturated monomer, sodium dodecyl sulfate was used as the hydrophilic additive, ammonium nitrate was used as the endothermic material, and glycerin diacrylate was used as the crosslinking agent.

<Color change observation>

After preparing the cooling sheet prepared as in the above example, color change according to a change in temperature was measured.

1 is a photograph showing a cooling sheet manufactured according to an embodiment, and FIG. 2 is a photograph showing a state in which the color is changed after applying the temperature of 38° C. to the cooling sheet according to FIG. 1.

1 and 2, it can be seen that the cooling sheet according to the embodiment of the present invention is changed to pink after absorbing the temperature from the existing purple cooling sheet, which causes the cooling sheet according to the present invention to be attached to the skin. It can be confirmed that it is possible to easily grasp the optimal sheet desorption time and the temperature change of the skin by cooling the body heat quickly and simultaneously changing the color of the cooling sheet.

As described above, although a preferred embodiment of the present invention has been described, those of ordinary skill in the art to which the present invention pertains understand that the present invention can be implemented in other specific forms without changing its technical spirit or essential features. Will be able to. Therefore, it should be understood that the embodiment described above is illustrative in all respects and not limiting.

Claims (4)

Non-woven fabric, a sheet pack attached to the non-woven fabric and a cooling gel sealed in the sheet pack,
The cooling gel is a cooling sheet that changes color according to body temperature, characterized in that the color changes according to the temperature change.
According to claim 1,
The cooling gel,
After preparing a mixed solution in which a water-soluble ethylenically unsaturated monomer, a hydrophilic additive, an endothermic material and a crosslinking agent are mixed at a constant weight ratio, first cooling is performed by adding purified water, glycerin and a first color dye to the mixed solution, followed by stirring and cooling. Cooling sheet that changes color according to body temperature, characterized in that it is prepared by preparing a gel, heating the first cooling gel, further mixing glycerin and a second color dye, followed by cooling.
According to claim 2,
The water-soluble ethylenically unsaturated monomer, the hydrophilic additive, the heat absorbing material and the crosslinking agent are 50 to 100 parts by weight of the water-soluble ethylenically unsaturated monomer, 10 to 20 parts by weight of the hydrophilic additive, 20 to 40 parts by weight of the heat absorbing material, and 2 to 6 parts by weight of the crosslinking agent, respectively. After mixing at a ratio to prepare a mixed solution, 80 to 120 parts by weight of purified water, 3 to 8 parts by weight of glycerin, and 3 to 8 parts by weight of the first color dye and 3 to 8 parts by weight of the mixed solution were added, and 33 to 37 A cooling sheet whose color changes according to body temperature, characterized in that a first cooling gel is prepared by stirring at a temperature of ℃ for 30 to 60 minutes and then cooling to a temperature of 1 to 5°C.
According to claim 3,
The glycerin and the second color dye are added at a weight ratio of 3 to 8 parts by weight of glycerin and 3 to 8 parts by weight of the second color dye to 100 parts by weight of the first cooling gel, and then 30 to 60 at a temperature of 40 to 43°C. Cooling sheet that changes color according to the body temperature, characterized in that to produce a cooling gel by cooling to a temperature of 1 to 5 ℃ after stirring for minutes.

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