KR102523275B1 - Transparent UV protection film and manufacturing method thereof - Google Patents

Abstract

A transparent UV blocking film according to various embodiments of the present invention includes a substrate; a release layer disposed on the substrate; a UV blocking layer disposed on the release layer; an adhesive layer disposed on the UV blocking layer; and a protective layer disposed on the adhesive layer, wherein the release layer is formed from a release composition, and the release composition includes silicon and a platinum catalyst.

Description

Transparent UV protection film and manufacturing method thereof {Transparent UV protection film and manufacturing method thereof}

Various embodiments of the present invention relate to a transparent UV blocking film and a manufacturing method thereof.

As the modern standard of living improves, outdoor sports such as golf and tennis are popularized, and travel is activated, so outdoor activities of modern people are continuously increasing. When active outdoors, ultraviolet rays included in direct sunlight from the sun have a harmful effect on the skin, so there is a need to block them. Therefore, it is intended to protect the skin from ultraviolet rays by wearing clothing or a hat or sleeve for blocking ultraviolet rays, or by using a sunscreen for blocking ultraviolet rays on exposed skin.

However, when sweat is secreted from the skin, the sunscreen for blocking UV rays applied by the sweat is erased, reducing the effect of blocking UV rays and causing discomfort in outdoor activities.

An object of the present invention is to solve the above-mentioned problems, and the duration of the UV blocking effect is long when attached to the skin, and it is transparent, so there is no sense of difference even when attached to the face, etc., so the usability is excellent, and the stability and UV blocking function are excellent. It is intended to provide a barrier film and a manufacturing method thereof.

A transparent UV blocking film according to various embodiments of the present invention includes a substrate; a release layer disposed on the substrate; a UV blocking layer disposed on the release layer; an adhesive layer disposed on the UV blocking layer; and a protective layer disposed on the adhesive layer, wherein the release layer is formed from a release composition, and the release composition includes silicone and a platinum catalyst.

A method for manufacturing a transparent sunscreen film according to various embodiments of the present invention includes preparing a sunscreen composition, a release composition, and an adhesive composition; printing the release composition on a substrate; firstly printing the sunscreen composition; Secondary printing of the sunscreen composition; printing the adhesive composition; and forming a protective layer.

The transparent sunscreen film of the present invention may be attached to the skin of a human body exposed to sunlight, such as a face or an arm. Therefore, it is less likely to be erased by sweat compared to sunscreen applied. In particular, the transparent sunscreen film of the present invention is transparent and there is no sense of difference even when attached to the face, so it can be used without burden during various outdoor activities. In addition, the transparent UV-blocking film of the present invention is excellent in stability and UV-blocking function.

The transparent sunscreen film of the present invention can easily transfer the sunscreen layer to the skin in a direct attachment method without using water through a release layer.

1 is an application example of the transparent UV blocking film of the present invention.
2 is a cross-sectional view of the transparent UV blocking film of the present invention.
3 is a process flow diagram of a method for manufacturing a transparent UV-blocking film of the present invention.

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings. Examples and terms used therein are not intended to limit the technology described in this document to specific embodiments, and should be understood to include various modifications, equivalents, and/or substitutes of the embodiments.

Referring to FIG. 1 , the transparent sunscreen film of the present invention may be attached to the skin of a human body exposed to sunlight, such as a face or an arm. Therefore, it is less likely to be erased by sweat compared to sunscreen applied. In particular, the transparent sunscreen film of the present invention is transparent and there is no sense of difference even when attached to the face, so it can be used without burden during various outdoor activities. In addition, the transparent UV-blocking film of the present invention is excellent in stability and UV-blocking function.

Specifically, referring to FIG. 2, the transparent UV blocking film 100 of the present invention includes a base material 101, a release layer 103, a first UV blocking layer 105, a second UV blocking layer 107, an adhesive A layer 109 and a protective layer 111 may be included.

The substrate 101 may include polyethylene terephthalate (PET).

The release layer 103 is disposed on the substrate 101 . Through the release layer 103, the first sunscreen layer 105 and the second sunscreen layer 107 formed thereon can be well applied, and the sunscreen film 100 can be well transferred to the skin. . In the case of a conventional sunscreen film, the sunscreen layer is transferred to the skin after being wetted with water, but in the present invention, the sunscreen layer can be transferred to the skin by direct attachment without using water through the release layer 103. .

The release layer 103 may include silicon. Specifically, the release layer 103 may include silicon and a platinum catalyst. The weight ratio of silicone and platinum catalyst may vary depending on the curing rate, but may be mixed in a weight ratio of 100:0.7 to 100:1. If it is out of this numerical range, hardening may not be performed well.

Meanwhile, the release composition for forming the release layer 103 may include liquid silicone, a platinum catalyst, and a solvent. First, a cured silicone product may be prepared by mixing liquid silicone and a platinum catalyst. At this time, the silicone cured material and the solvent may be mixed in a weight ratio of 1:4 to 1:5. Through this mixing ratio, it is possible to secure an appropriate release strength. For example, when the weight ratio of the cured silicone material and the solvent is less than 1:4, the release strength is too strong and it may be difficult to apply the UV blocking layer formed thereon. When the weight ratio of the cured silicone material and the solvent is greater than 1:5, the release strength is too weak and it may be difficult to transfer to the skin.

The first UV blocking layer 105 and the second UV blocking layer 107 may be disposed on the release layer 103 . Although the UV blocking layer is illustrated as being composed of two layers in FIG. 2, the embodiment is not limited thereto, and may be composed of two or more various layers.

Each of the first UV blocking layer 105 and the second UV blocking layer 107 may have a thickness of 10 to 20 μm. When the thickness of each UV blocking layer is less than 10 μm, the UV blocking effect may decrease. When the thickness of each UV blocking layer exceeds 20 μm, transparency may decrease.

The UV blocking composition for forming the first UV blocking layer 105 and the second UV blocking layer 107 may include polyurethane, zinc oxide, a UVA blocking material, and a UVB blocking material.

The polyurethane may be polyurethane diluted in a solvent. Specifically, the polyurethane may be polyurethane diluted in DMAC (Dimethylacetamide) and MEK (Methylethyldetone). Through this, the oil-based sunscreen material can dissolve well. Polyurethane may be included in 80 parts by weight to 90 parts by weight based on 100 parts by weight of the sunscreen composition. When polyurethane is included in an amount of less than 80 parts by weight, the sunscreen material may not dissolve well. When the polyurethane is included in an amount exceeding 90 parts by weight, the content of the UV blocking material is relatively reduced, and thus the UV blocking effect may be deteriorated.

Zinc oxide can improve UVA protection. Zinc oxide may be included in an amount of 1.5 parts by weight to 2.0 parts by weight based on 100 parts by weight of the sunscreen composition. When zinc oxide is included in an amount of less than 1.5 parts by weight, UVA blocking rate may decrease. When zinc oxide is included in an amount exceeding 2.0 parts by weight, transparency of the film may be impaired.

UVA blocking substances include Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Butyl Methoxydibenzoylmethane, And 4-methylbenzylidene camphor (4-Methylbenzylidenecamphor) 　 may include at least one selected from the group consisting of. Preferably, the UVA blocking material may include Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine and Diethylamino Hydroxybenzoyl Hexyl Benzoate.

The UVA blocking material may be included in an amount of 0.5 to 3 parts by weight based on 100 parts by weight of the sunscreen composition. Specifically, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine may be included in an amount of 0.5 parts by weight to 1 part by weight based on 100 parts by weight of the sunscreen composition. Diethylamino Hydroxybenzoyl Hexyl Benzoate may be included in an amount of 1 to 2 parts by weight based on 100 parts by weight of the sunscreen composition.

UVB blocking substances include ethylhexyl methoxycinnamate, isoamyl- p - methoxycinnamate, octyl methoxycinnamate, and octyl salicylate. And it may include at least one selected from the group consisting of p -aminobenzoic acid ( p -aminobenzoic acid). Preferably, the UVB blocking material may include ethylhexyl methoxycinnamate and isoamyl- p - methoxycinnamate.

The UVB blocking material may be included in an amount of 5.5 to 12 parts by weight based on 100 parts by weight of the sunscreen composition. Specifically, ethylhexyl methoxycinnamate may be included in an amount of 5 parts by weight to 9 parts by weight based on 100 parts by weight of the sunscreen composition. Isoamyl- p -methoxycinnamate may be included in an amount of 0.5 parts by weight to 3 parts by weight based on 100 parts by weight of the sunscreen composition.

In the present invention, by including the components constituting the sunscreen composition in a specific amount, it is possible to secure the sunscreen function while improving the application performance on the release layer 103.

The adhesive layer 109 may be disposed on the second UV blocking layer 107 . The adhesive layer 109 is a layer that is directly attached to the skin, and may include an acrylate monomer that is non-irritating to the skin and has excellent adhesiveness. The adhesive composition for forming the adhesive layer 109 may include an acrylate monomer, a nonionic surfactant, and water. Dilute to adjust the adhesive strength. At this time, the adhesive force may be adjusted by adjusting the mixing amount of the acrylate monomer.

The protective layer 111 is disposed on the adhesive layer 109 . The protective layer 111 may protect the transparent UV blocking film 100 from physical damage and prevent contamination from the outside. The protective layer 111 may be removed when the transparent sunscreen film 100 is attached to the skin. The protective layer 111 is formed by separating the substrate 101, the release layer 103, the first UV blocking layer 105, the second UV blocking layer 107, and the adhesive layer 109 from the protective layer 111. It can be made to adhere well to the skin. For example, the protective layer 111 may be siliconized paper.

Hereinafter, a manufacturing method of a UV blocking film according to various embodiments of the present invention will be described with reference to FIG. 3 .

3 is a process flow diagram of a method for manufacturing a transparent UV-blocking film of the present invention.

Referring to FIG. 3 , a method for manufacturing a sunscreen film according to various embodiments of the present invention includes preparing a sunscreen composition, a release composition, and an adhesive composition (S100); Printing a release composition on a substrate (S200); firstly printing the sunscreen composition (S300); Secondarily printing the sunscreen composition (S400); Printing an adhesive composition (S500); and forming a protective layer (S600).

First, in the step of preparing a sunscreen composition, a mold release composition, and an adhesive composition (S100), a sunscreen composition containing polyurethane, zinc oxide, a UVA blocking material, and a UVB blocking material described above is prepared. can In addition, a release composition containing the liquid silicone described above, a platinum catalyst and a solvent may be prepared. In addition, an adhesive composition containing the previously described acrylate monomer, a nonionic surfactant, and water may be prepared.

In the step of printing the release composition on the substrate (S200), a polyethylene terephthalate (PET) film may be prepared and the release composition may be printed on the PET film. At this time, printing may be performed in a screen printing method. The release composition may be a composition including the liquid silicone described above, a platinum catalyst, and a solvent. After applying the release composition on PET at 0.2 to 0.3 g/m 2 , it may be dried at a temperature of 150 to 170° C. at a rate of 20 to 50 m/min. The length of the heating chamber for complete drying can pass 25 to 35m at the above speed. A release layer may be formed on a substrate by printing such a release composition.

In the first printing of the sunscreen composition (S300), the previously prepared sunscreen composition may be printed on the release layer. At this time, printing may be performed in a screen printing method. After applying the sunscreen composition at a coating thickness of 20 to 30 μm, it may be dried at 100 to 120° C. for 30 to 60 sec. Through this, both DMAC (Dimethylacetamide) and MEK (Methylethyldetone), which are solvents in which polyurethane is diluted, may be volatilized. In addition, a first UV blocking layer having a thickness of 10 to 20 μm may be formed.

In the secondary printing of the sunscreen composition (S400), the previously prepared sunscreen composition may be printed on the first sunscreen layer. At this time, printing may be performed in a screen printing method. After applying the sunscreen composition at a coating thickness of 20 to 30 μm, it may be dried at 100 to 120° C. for 30 to 60 sec. Through this, both DMAC (Dimethylacetamide) and MEK (Methylethyldetone), which are solvents in which polyurethane is diluted, may be volatilized. In addition, a second UV blocking layer having a thickness of 10 to 20 μm may be formed.

In the present invention, by applying and drying the sunscreen composition twice, it is possible to overcome the limit of a single application amount and maintain transparency.

Next, in the step of printing the adhesive composition (S500), the previously prepared adhesive composition may be printed on the second sunscreen layer. At this time, printing may be performed in a screen printing method. Through this, an adhesive layer may be formed.

Next, in the step of forming a protective layer (S600), a protective layer may be attached on the adhesive layer.

Hereinafter, the present invention will be described in more detail by examples. However, the following examples are only for explaining the present invention in more detail, and the scope of the present invention is not limited by the following examples.

Example - Preparation of sunscreen composition

The sunscreen composition was formulated and prepared according to Table 1 below.

INCI (International Nomenclature of Cosmetic Ingredients) Name CAS No. Function content A Ethylhexyl Methoxycinnamate UV-B Filter 7.50% B Isoamyl p-Methoxycinnamate 71617-10-2 UV-B Filter 1.25% C Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine 187393-00-6 UV-A Filter 0.75% D Diethylamino Hydroxybenzoyl Hexyl Benzoate 302776-68-7 UV-A Filter 1.25% E Zinc Oxide 1.50% F PU (diluted in DMAC. MEK) 87.75%

First, a first dispersion is prepared by adding E to A and stirring at 150 rpm for 5 to 10 minutes. After stirring, check whether E is well dispersed in A. Then, BCD was added in turn and stirred at 65° C. for 60 minutes at 400 rpm. After stirring, check whether the pale yellow powders C and D are well dispersed. Next, the first dispersion is added to F and dispersed at 150 rpm for 5 to 10 minutes .

Store the prepared sunscreen composition in a container not exposed to sunlight at room temperature.

The features, structures, effects, etc. described in the foregoing embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are merely examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention belongs can exemplify the above to the extent that does not deviate from the essential characteristics of the present embodiment. It will be seen that various variations and applications that have not been made are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences related to these variations and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (16)

write;
a release layer disposed on the substrate;
a UV blocking layer disposed on the release layer;
an adhesive layer disposed on the UV blocking layer; and
Including a protective layer disposed on the adhesive layer,
The release layer is formed from a release composition,
The release composition includes a silicone cured product including silicone and a platinum catalyst, and a solvent,
The silicone and platinum catalysts are mixed in a weight ratio of 100:0.7 to 100:1,
The silicone cured product and the solvent are mixed in a weight ratio of 1:4 to 1:5,
The UV blocking layer is formed from a UV blocking composition,
The sunscreen composition,
Based on 100 parts by weight of the sunscreen composition, 7.5 parts by weight of ethylhexyl methoxycinnamate, 1.25 parts by weight of isoamyl- p - methoxycinnamate, bis-ethylhexyloxyphenol methyl 0.75 parts by weight of Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, 1.25 parts by weight of Diethylamino Hydroxybenzoyl Hexyl Benzoate, 1.5 parts by weight of zinc oxide and polyurethane diluted in a solvent Characterized in that it comprises 87.75 parts by weight, a transparent sunscreen film. delete delete According to claim 1,
The UV blocking layer is a transparent UV blocking film, characterized in that it comprises at least two or more layers. delete delete delete delete According to claim 1,
The adhesive layer is characterized in that it comprises an acrylate monomer (Acrylate Monomer), a transparent UV blocking film. preparing a sunscreen composition, a release composition, and an adhesive composition;
printing the release composition on a substrate;
firstly printing the sunscreen composition;
Secondary printing of the sunscreen composition;
printing the adhesive composition; and
Including the step of forming a protective layer,
The release composition includes a silicone cured product containing silicone and a platinum catalyst, and a solvent,
The silicone and platinum catalysts are mixed in a weight ratio of 100:0.7 to 100:1,
The silicone cured product and the solvent are mixed in a weight ratio of 1:4 to 1:5,
The sunscreen composition,
Based on 100 parts by weight of the sunscreen composition, 7.5 parts by weight of ethylhexyl methoxycinnamate, 1.25 parts by weight of isoamyl- p - methoxycinnamate, bis-ethylhexyloxyphenol methyl 0.75 parts by weight of Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, 1.25 parts by weight of Diethylamino Hydroxybenzoyl Hexyl Benzoate, 1.5 parts by weight of zinc oxide and polyurethane diluted in a solvent Method for producing a transparent sunscreen film containing 87.75 parts by weight. According to claim 10,
The printing step is a method for producing a transparent ultraviolet blocking film, characterized in that printing by screen printing method. delete delete delete delete According to claim 10,
The adhesive composition is characterized in that it comprises an acrylate monomer, a non-ionic surfactant and water, a method for producing a transparent UV-blocking film.

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