KR20230163960A - Photosensitive uv blocking patch and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a sunscreen patch and a method of manufacturing the same. Specifically, the present invention relates to a sunscreen patch applied with a photochromic material that changes color as ultraviolet rays are irradiated and a method of manufacturing the same.

Description

Photosensitive UV blocking patch and its manufacturing method {PHOTOSENSITIVE UV BLOCKING PATCH AND MANUFACTURING METHOD THEREOF}

The present invention relates to a sunscreen patch and a method of manufacturing the same. Specifically, the present invention relates to a sunscreen patch applied with a photochromic material that changes color as ultraviolet rays are irradiated and a method of manufacturing the same.

In general, sunscreen was used for long-term activities outdoors, or masks and sunshades made of cotton were used. However, the type of sunscreen applied to the skin had the inconvenience of being sticky or staining clothes, and there was also the inconvenience of having to remove it separately by washing the face after use. Masks have the disadvantage of being uncomfortable to breathe, making them difficult to wear during strenuous exercise, and sunscreens have the disadvantage of blocking visibility.

Recently, due to the above-mentioned problems, film-type skin patches that are easy to attach and detach from the skin and also have a cooling effect are being used.

In general, skin patches are used for skin care such as UV protection or moisturizing, and are attached to the skin by impregnating general non-woven fabric with agents such as various essences, or attached to the skin as a hydrogel.

Among skin patches, the use of sunscreen patches, which are used for the purpose of blocking ultraviolet rays, is increasing due to their high convenience because they can be easily and selectively attached only to areas where blemishes and blemishes are likely to occur.

In particular, sunscreen patches have the additional effect of lowering skin temperature by attaching them, so they are popular among those who enjoy outdoor activities during the summer when the heat wave continues.

Korean Patent No. 10-2242158

The purpose of the present invention is to provide a patch for blocking ultraviolet rays, which not only has the effect of blocking ultraviolet rays, but also has the additional effect of displaying the intensity of light.

In addition, the present invention aims to provide an aesthetically excellent sunscreen patch by applying a specific color-changing pattern.

Other objects and advantages of the present invention can be understood from the following description and will be more clearly understood by practicing the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

According to the present invention, a base material including any one of synthetic fibers, natural fibers, and regenerated fibers; and a coating layer formed on the rear surface of the base substrate and containing a hydrogel; It provides a UV blocking patch, characterized in that the base substrate is provided with a photochromic material that changes color as ultraviolet rays are irradiated.

The base substrate may be processed into any one of the fibers, woven fabrics, knitted fabrics, and non-woven fabrics.

The base substrate may have a thickness of 0.3 to 2 mm, and the coating layer may have a thickness of 0.02 to 0.1 mm.

The ultraviolet ray blocking rate of the base material may be 80 to 99%.

The photochromic material may include one selected from the group consisting of spiro-oxazine series, naphtopyran series, and combinations thereof.

The photochromic material remains colorless in a light wavelength range of 400 nm or more, and may change to color in a light wavelength range of less than 400 nm.

The photochromic material maintains one color in a light wavelength range of 400 nm or more and can change to a different color in a light wavelength range of less than 400 nm.

The photochromic material may have the greatest degree of color change in ultraviolet rays with a wavelength of 280 to 400 nm.

The photochromic material may have the highest blocking rate against ultraviolet rays with a wavelength of 280 to 400 nm.

The ultraviolet ray blocking rate of the area provided with the photochromic material may increase by 0.2% to 4.0%.

The photochromic material may be impregnated and coated on fibers included in the base substrate.

The photochromic material may be coated on the entire base substrate.

A photochromic layer containing a photochromic material may be formed on the entire surface of the base substrate.

The photochromic layer may include a photochromic material and a binder.

The photochromic layer may include 30% to 50% by weight of a photochromic material and 50% to 70% by weight of a binder.

The photosensitive layer has a pattern and may be formed on a base substrate.

According to the present invention, a preparation step of preparing a base material containing any one of synthetic fibers, natural fibers, and regenerated fibers; A first coating step of forming a photochromic layer by coating a photochromic material on the entire surface of the base substrate; And a secondary coating step of forming a coating layer containing hydrogel on the back of the base substrate; It provides a method of manufacturing a sunscreen patch, wherein the photochromic material changes color as ultraviolet rays are irradiated.

In the first coating step, a photochromic composition containing a photochromic material, a binder, and a solvent may be coated on the entire surface of the base substrate to form a photochromic layer.

The photochromic composition may be coated on the base substrate by any one of comma coating, gravure coating, and rotary screen coating.

According to the UV blocking patch of the present invention, it not only has the effect of blocking UV rays, but also has the effect of being able to predict the intensity of light by changing color depending on the intensity of light.

In addition, the UV-blocking patch of the present invention is aesthetically excellent because the color of a specific pattern changes in real time depending on the location.

Figure 1 is a flow chart of the manufacturing process of the sunscreen patch of the present invention.
Figure 2 shows the results of Experimental Example 2.

Hereinafter, the detailed configuration of the present invention will be described in detail with reference to the attached drawings and various embodiments. The embodiments described below are shown as examples to aid understanding of the present invention, and the attached drawings are not drawn to scale to aid understanding of the invention, and the dimensions of some components may be exaggerated. .

Since the present invention can be subject to various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The present invention relates to a sunscreen patch and a method of manufacturing the same.

Hereinafter, a UV-blocking patch and a manufacturing method of the UV-blocking patch will be separately described.

UV protection patch

The sunscreen patch of the present invention includes a base material and a coating layer formed on one surface of the base material.

The base substrate is made of fibers processed into any one of fabric, knitted fabric, and non-woven fabric, and has the effect of blocking ultraviolet rays.

The thickness of the base substrate is 0.3 to 2.0 mm, preferably 0.4 to 1.0 mm. At this time, the thicker the base material is, the better the UV blocking effect can be. However, if the thickness exceeds 2.0 mm, the aesthetics may deteriorate, the fit may be poor, and attachment to the skin may be difficult.

The base substrate may preferably include any one of synthetic fibers, natural fibers, and regenerated fibers.

Specifically, the synthetic fiber may be at least one of nylon, polyester, olefin, and acrylic, the natural fiber may be at least one of cotton, hemp, wool, silk, and wool, and the regenerated fiber may be rayon, It may be at least one of lyocell and pulp.

In order to increase the UV blocking effect, the UV blocking patch of the present invention may be coated with a UV blocking material on the surface of the fiber included in the base material, or may be impregnated with a UV blocking material.

The UV blocking material may include any one selected from the group consisting of zinc oxide, titanium oxide, and combinations thereof.

Additionally, a pigment material may be coated on the surface of the fiber, or a pigment material may be impregnated.

The ultraviolet ray blocking rate of the base material according to standard testing (KS K 0850:2019) is 80 to 99%.

A coating layer containing hydrogel is formed on either side of the base substrate, and one side on which the coating layer is formed becomes the back side of the base substrate.

The sunscreen patch can be attached to the skin by bringing the coating layer formed on the back of the base material into contact with the skin.

The thickness of the coating layer is preferably 0.02 to 0.1 mm.

The hydrogel may include, for example, any one of collagen, gelatin, fibrin, chitosan, hyaluronic acid, carrageenan, agar, pectin, guar gum, xanthan gum, gum arabic, cellulose derivative, and glycerin.

The coating layer may further include additives that can provide cosmetic or moisturizing effects.

*The UV-blocking patch of the present invention is characterized by providing a photochromic material that changes color as ultraviolet rays are irradiated to the base substrate.

The photochromic material may be provided by coating the entire surface of the base substrate, or may be provided by impregnating the base substrate.

Specifically, a photosensitive layer containing a photochromic material may be formed on the entire surface of the base substrate.

The thickness of the photosensitive layer is preferably 0.01 to 0.10 mm.

The photochromic layer preferably includes a photochromic material and a binder. At this time, the binder provides adhesion so that the photochromic material can be completely coated on the base substrate, but also allows the photochromic layer to be formed while maintaining its shape on the base substrate.

The type of the binder is not specifically determined, and any one that can be used in the field of beauty technology can be used.

The photochromic layer preferably contains 30% to 50% by weight of a photochromic material and 50% to 70% by weight of a binder. More preferably, the photochromic layer includes 30% to 40% by weight of a photochromic material and 60% to 70% by weight of a binder. At this time, if the content of the photochromic material is less than 30% by weight, the degree of color change due to ultraviolet rays may be minimal and the ultraviolet ray blocking effect may be somewhat reduced. Additionally, if the content of the photochromic material exceeds 50% by weight, the binder content may be relatively insufficient and the photosensitive layer may not be properly formed on the base substrate.

The photochromic material may have different saturation or color depending on the intensity and wavelength of light.

In other words, the photochromic material of the present invention can change color based on a wavelength of about 400 nm.

According to one embodiment, the photochromic material remains colorless in a light wavelength range of 400 nm or more, for example, indoors or in a place with weak ultraviolet rays, and may change to color when exposed to a light wavelength range of less than 400 nm. For example, in visible light, saturation may be low, and as the wavelength of light becomes shorter, saturation may increase.

According to another embodiment, the photochromic material maintains its color in a light wavelength range of 400 nm or more, for example, indoors or in a place where ultraviolet rays are weak, and may change to a different color when exposed to a light wavelength range of less than 400 nm. For example, in visible light, it appears yellow, but as the wavelength of light becomes shorter, it may change to green.

Ultraviolet rays can be broadly divided into two areas depending on their wavelength. Specifically, the ultraviolet rays can be divided into UVA and UVB depending on the wavelength.

The wavelength range of UVA is 315 nm to 400 nm, and the wavelength range of UVB is 280 nm to 315 nm.

The UVA penetrates into the dermal layer of the skin and destroys collagen and elastin, thereby reducing skin elasticity and forming wrinkles, thereby promoting skin aging. In particular, UVA is the most commonly encountered ultraviolet ray outdoors because it accounts for most of the ultraviolet rays.

The photochromic material of the present invention is characterized by the greatest degree of color change in ultraviolet rays with a wavelength of 280 nm to 400 nm. Therefore, the UV-blocking patch of the present invention can also serve as an indicator for predicting the intensity of ultraviolet rays during outdoor activities depending on the degree of discoloration of the photochromic layer.

In addition, the photochromic material is characterized by the highest blocking rate against ultraviolet rays with a wavelength of 280 nm to 400 nm. That is, the UV-blocking patch of the present invention can increase the UV-blocking rate by 0.2 to 4.0% by applying a photochromic layer. More specifically, the UV blocking patch of the present invention can improve the UV blocking rate by 2.7 to 4.0% by applying a photochromic layer.

The photochromic material is spiro-oxazine-based, naphtopyran-based, fulgide-based, diaryethene-based, azobenzene-based, and spiropyran. ) and combinations thereof. More preferably, the photochromic material may include at least one of spiro-oxazine and naphtopyran. This is because the Spiro-oxazine or naphtopyran systems are most sensitive to ultraviolet rays with a wavelength of 280 nm to 400 nm and are therefore suitable as indicators.

The photochromic layer of the present invention has a pattern and can be formed on a base substrate.

The pattern is formed for the purpose of aesthetic beauty, and the shape of the pattern is not particularly limited in the present invention.

The photochromic material may be provided by being coated on a base substrate. In this case, like the photochromic layer, it may be coated to have a specific pattern.

How to manufacture a patch for UV protection

Figure 1 is a flowchart of the process of manufacturing the sunscreen patch of the present invention. Hereinafter, each step will be described with reference to FIG. 1. However, explanations that overlap with the contents of each sunscreen patch discussed above will be excluded.

The UV-blocking patch of the present invention may have various manufacturing methods depending on the method of providing the photochromic material, and the present invention describes one of them.

The method for manufacturing a sunscreen patch of the present invention includes a preparation step, a first coating step, and a second coating step.

preparation stage

This is the step of preparing a base material containing any one of synthetic fibers, natural fibers, and regenerated fibers.

The base substrate may be processed from the fiber into any one of fabric, knitted fabric, and non-woven fabric.

The surface of the fiber included in the base substrate may be coated with any one of a UV blocking material, a pigment, and a photochromic material, or may be impregnated with the material.

1st coating step

This is the step of forming a photochromic layer by coating the entire surface of the base substrate with a photochromic material.

More specifically, the photochromic layer is formed by coating the entire surface of the base substrate with a photochromic composition containing a photochromic material.

The photochromic composition includes a photochromic material, a binder, and a solvent. At this time, the photochromic composition preferably includes 10% to 50% by weight of the photochromic material, 20% to 60% by weight of the binder, and 20% to 60% by weight of the solvent.

The solvent may be, for example, purified water.

The photochromic composition may be coated on the entire surface of the base substrate, or may be coated in a predetermined pattern. When the photochromic composition is coated with a predetermined pattern, the photochromic composition is specifically applied to the surface of a roller embossed with a pattern, and then the roller is rotated on the base substrate to coat the photochromic composition on the surface of the base substrate. You can. For example, the photochromic composition can be coated on the base substrate by any one of comma coating, gravure coating, and rotary screen coating using a roller embossed with a predetermined pattern. Alternatively, the photochromic composition may be coated by applying the photochromic composition to the surface of a plate embossed with a predetermined pattern and then stamping the plate on the surface of the base substrate.

2nd coating step

This is the step of forming a coating layer containing hydrogel on the back of the base substrate. More specifically, a coating layer can be formed after applying the gel composition to the back of the base substrate.

The gelling composition is, for example, one selected from the group consisting of collagen, gelatin, fibrin, chitosan, hyaluronic acid, carrageenan, agar, pectin, guar gum, xanthan gum, gum arabic, cellulose derivatives, glycerin, and combinations thereof dissolved in purified water. It can be manufactured.

In the present invention, a drying step may be further included if necessary after at least one of the first coating step and the second coating step.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are intended to illustrate the present invention in more detail, and the scope of the present invention is not limited by these examples.

Example 1

It is processed into a non-woven form to form a coating layer containing hydrogel on the back, and Spiro-oxazine-based photochromic material is formed on a base material with an ultraviolet ray blocking rate of 86.78% according to a standard test (KS K 0850:2019). A mixture of materials and binders was applied to form a photochromic layer (35% by weight of photochromic material, 65% by weight of binder) with a thickness of 0.02 mm.

Example 2

It is processed into a non-woven form to form a coating layer containing hydrogel on the back, and a photochromic material of the Naphtopyran series is formed on a base material with an ultraviolet ray blocking rate of 89.09% according to a standard test (KS K 0850:2019). A mixed solution containing a binder was applied to form a photochromic layer (45% by weight of photochromic material, 55% by weight of binder) with a thickness of 0.02 mm.

Comparative Example 1

It is processed into a non-woven form to form a coating layer containing hydrogel on the back, and a Fulgide-based photochromic material and binder are placed on the base substrate, which has a UV blocking rate of 91.31% according to standard testing (KS K 0850:2019). A mixed solution containing was applied to form a photochromic layer (35% by weight of photochromic material, 65% by weight of binder) with a thickness of 0.02 mm.

* Comparative example 2

It is processed into a non-woven form to form a coating layer containing a hydrogel on the back, and a photochromic material of the same type as in Example 1 above is placed on a base substrate with an ultraviolet ray blocking rate of 95.04% according to a standard test (KS K 0850:2019). A mixed solution containing a binder was applied to form a photochromic layer (10% by weight of photochromic material, 90% by weight of binder) with a thickness of 0.02 mm.

Comparative example 3

It is processed into a non-woven form and a coating layer containing a hydrogel is formed on the back, and a photochromic material of the same type as in Example 1 is formed on a base substrate with an ultraviolet ray blocking rate of 86.78% according to a standard test (KS K 0850:2019). A mixed solution containing a binder was applied to form a photochromic layer (20% by weight of photochromic material, 80% by weight of binder) with a thickness of 0.02 mm.

Experimental Example 1

After measuring the ultraviolet ray (UV-A) blocking rate of the UV-blocking patches prepared in Examples 1 to 2 and Comparative Examples 1 to 4 according to the standards of KS K 0850:2019, the results are presented in the table below. It is shown in 1.

Example 1 Example 2 Comparative Example 1 Comparative example 2 Comparative example 3 Previous block rate* 86.78% 89.09% 91.31% 95.04% 86.78% Subsequent blocking rate* 89.56% 92.31% 92.89% 95.87% 87.98% *Previous blocking rate = UV blocking rate of the base material before applying the photochromic layer.
*Afterwards blocking rate = UV blocking rate after applying photochromic layer

Experimental Example 2

For the UV-blocking patch of Example 1, the color change of the photochromic layer was observed under the conditions of visible light, ultraviolet ray (365 nm), and ultraviolet ray (254 nm) according to the standard of KS K 0850:2019, and is shown in Figure 2.

Referring to FIG. 2, it can be seen that the photochromic layer of Example 1, which has the characteristics of the present invention, has the clearest color change at a wavelength of 365 nm.

Claims (13)

A base material containing any one of synthetic fibers, natural fibers, and regenerated fibers, and having a thickness of 0.3 to 2 mm; and
A coating layer formed on the back of the base substrate, including hydrogel, and having a thickness of 0.02 to 0.1 mm; Including,
The base substrate is provided with a photochromic material that changes color when irradiated with ultraviolet rays,
The photochromic material includes one selected from the group consisting of spiro-oxazine series, naphtopyran series, and combinations thereof,
A photochromic layer containing a photochromic material is formed on the front surface of the base substrate,
The thickness of the photochromic layer is 0.02 mm,
The photochromic layer is a hydrogel patch for sunscreen, characterized in that it contains 45% by weight of a photochromic material and 55% by weight of a binder.
According to paragraph 1,
The base material is a sunscreen patch in which the fiber is processed into any one of fabric, knitted fabric, and non-woven fabric.
According to paragraph 1,
A patch for blocking ultraviolet rays, wherein the base material has a UV blocking rate of 80 to 99%.
According to paragraph 1,
A patch for blocking UV rays, wherein the UV blocking rate of the base material is 80 to 99%.
According to paragraph 1,
The photochromic material remains colorless in the light wavelength range of 400 nm or more,
A UV-blocking patch that changes color in the light wavelength range of less than 400 nm.
According to paragraph 1,
The photochromic material maintains one color in the light wavelength range of 400 nm or more, and changes to a different color in the light wavelength range of less than 400 nm.
According to paragraph 1,
The photochromic material is a UV-blocking patch that has the greatest degree of color change in ultraviolet rays with a wavelength of 280 to 400 nm.
According to paragraph 1,
A patch for sunscreen that increases the sunblock rate of the area provided with the photochromic material by 0.2% to 4.0%.
According to paragraph 1,
The photochromic material is a sunscreen patch in which fibers included in the base substrate are impregnated and coated.
According to paragraph 1,
The photosensitive layer is a UV-blocking patch that has a pattern and is formed on a base material.
A preparation step of preparing a base substrate containing any one of synthetic fibers, natural fibers, and regenerated fibers and having a thickness of 0.3 to 2 mm;
A first coating step of coating a photochromic material on the entire surface of the base substrate to form a photochromic layer with a thickness of 0.02 mm; and
A secondary coating step of forming a coating layer including hydrogel on the back of the base substrate and having a thickness of 0.02 to 0.1 mm; Including,
The photochromic material changes color when irradiated with ultraviolet rays,
The photochromic material includes one selected from the group consisting of spiro-oxazine series, naphtopyran series, and combinations thereof,
A method of manufacturing a patch for UV protection, characterized in that the photosensitive layer includes 45% by weight of a photochromic material and 55% by weight of a binder.
According to clause 11,
In the first coating step, a photochromic composition containing a photochromic material, a binder, and a solvent is coated on the entire surface of the base substrate to form a photochromic layer.
According to clause 12,
A method of manufacturing a patch for sunscreen, wherein the photochromic composition is coated on a base substrate by any one of comma coating, gravure coating, and rotary screen coating.