100% ultraviolet-proof and blue-light-proof ultraviolet-proof film for buildings and automobiles

Abstract

The invention relates to a 100% ultraviolet-proof and blue-light-proof ultraviolet-proof film for buildings and automobiles. The ultraviolet-proof film for buildings and automobiles according to the present invention comprises: a transparent substrate layer; and an ultraviolet-proof layer which is formed on the transparent substrate layer using a sputtering method, contains one or more oxides selected from the group consisting of zinc, titanium, zirconium, cesium, and silicon, and has a light transmittance of 0% or less at a wavelength of 280-400 nm. The ultraviolet-proof film for buildings and automobiles can prevent ultraviolet rays and blue light by 100%.

Description

Technical Field

[0001] The invention relates to an anti-ultraviolet film for buildings and automobiles which can 100% prevent ultraviolet rays and blue light. Background Art

[0002] Sunlight is generally divided into ultraviolet rays (100-380nm), visible light (380-780nm), and infrared rays (780-60000nm). Infrared rays are further divided into near infrared rays and far infrared rays. Of these, ultraviolet rays account for about 6%, visible light for about 46%, and infrared rays account for about 48%. When the skin is exposed to ultraviolet rays for a long time, ultraviolet rays can cause skin aging and cancer. Infrared rays can increase indoor temperatures and cause increased cooling costs in summer.

[0003] The so-called UV protection film refers to a film made of advanced materials such as metals or ceramics that have the property of regulating the amount of energy generated by sunlight that enters the closed internal space through the glass.

[0004] This UV protection film must be used on window glass existing in automobiles, residential or commercial building exterior walls to block solar heat and create a more comfortable driving, living and office environment.

[0005] In particular, cars are directly exposed to solar heat as they move while driving, and are greatly affected by solar heat even when they are parked on the road for a long time without moving, so it is necessary to apply an anti-ultraviolet film.

[0006] Often, the UV protection film, which is commonly referred to as a car sunscreen film (film), plays the role of protecting people and things inside the car from the damage of the sun's rays.

[0007] In particular, it blocks glare by blocking ultraviolet rays (UV Protection), prevents eye diseases such as cataracts, glaucoma, and macular degeneration caused by ultraviolet exposure, and prevents skin damage such as skin aging and skin cancer. It prevents the production of stress hormones (cortisol) in the skin caused by ultraviolet exposure, prevents the decline of memory and cognitive function, protects automobile internal materials from discoloration and deformation, and prevents secondary injuries by preventing glass breakage and scattering.

[0008] In the visible light region, blue light in the wavelength region of 380 to 495 nm is called blue light, which has strong energy in the visible light. In particular, the purple-blue wavelength region of 380 to 420 nm is not absorbed by the cornea and lens and reaches the retina, which may damage the retina and cause eye fatigue and sleep disturbance. In addition, it is known that this blue light inhibits the secretion of melatonin and affects the human body rhythm.

[0009] The average temperature rises due to global warming, and climate change such as the destruction of the ozone layer due to environmental pollution has led to the gradual increase in the adverse effects of ultraviolet rays, infrared rays, and solar radiation.

[0010] Recently, the demand for products that create a comfortable environment in living spaces and office spaces and are used for physical health is increasing, and the demand for technical development of such functional products is also on the rise.

[0011] Prior art literature

[0012] Patent Literature

[0013] Patent Document 1: Korean Patent Publication No. 10-2023-0063409 Summary of the invention

[0014] The present inventors have provided an anti-ultraviolet film for buildings and automobiles that can block not only ultraviolet wavelengths but also 100% of blue light in the wavelength range of 380 to 420 nm in the blue region in order to solve the above-mentioned problems of the prior art.

[0015] In order to solve the above-mentioned problems, the present invention provides the following anti-ultraviolet film for construction and automobile use, comprising: a transparent substrate layer; and an anti-ultraviolet layer, which is formed on the above-mentioned transparent substrate layer using a sputtering method and includes one or more oxides selected from the group consisting of zinc, titanium, zirconium, cesium and silicon, and has a light transmittance of less than 5% at a wavelength of 100 to 420 nm.

[0016] Furthermore, the present invention can provide an ultraviolet light-blocking film for buildings and automobiles, wherein the ultraviolet light-blocking layer is formed of two or more thin films in which a titanium oxide layer and a zinc oxide layer are repeated, and the thin film has a thickness of 30 to 100 nm.

[0017] Furthermore, the present invention can provide the following anti-ultraviolet film for construction and automobiles, further comprising: a super-coating layer located on the anti-ultraviolet layer; a functional layer located on the super-coating layer; and a protective film located on the functional layer.

[0018] Furthermore, the present invention can provide the following anti-ultraviolet film for buildings and automobiles, wherein the above-mentioned functional layer includes an anti-blue light layer, and the anti-blue light layer includes one or more selected from the group consisting of perylene, porphyrin, coumarin and acrydine.

[0019] Furthermore, the present invention can provide the following UV protection film for buildings and automobiles, further comprising an infrared protection layer, wherein the infrared protection layer is located on the transparent base material layer.

[0020] Furthermore, the present invention can provide an ultraviolet protection film for buildings and automobiles, wherein the film has a thickness of 3 mil or more.

[0021] Furthermore, the present invention can provide an ultraviolet light-blocking film for buildings and automobiles, wherein the light transmittance at a wavelength of 100 to 400 nm is 0%.

[0022] According to the present invention, the anti-ultraviolet film for buildings and automobiles is formed by multiple layers of oxide thin film layers formed by sputtering, thereby having the effect of not only blocking the ultraviolet wavelength region, but also 100% blocking the 380-400nm wavelength region in the blue light region.

[0023] Furthermore, by applying the anti-ultraviolet film according to the present invention to window glass of the outer wall of a residential or commercial building, or to glass of an automobile, a more comfortable driving, living and working environment can be created by blocking ultraviolet rays.

[0024] Also, the anti-ultraviolet film according to the present invention blocks blue light to block glare generated from a glass window and provides clear visibility, thereby having the effect of reducing fatigue of the user's eyes.

[0025] Furthermore, by blocking the 300-400nm wavelength region, which is a visual range visible to insects, it is possible to block the insects from seeing the light inside buildings or cars, thereby having the effect of preventing or reducing the entry of pests.

[0026] Furthermore, the UV protection film according to the present invention has a multi-layer structure, has excellent impact resistance, and has an effect of preventing scattering. DETAILED DESCRIPTION

[0027] The following embodiments are provided to fully convey the concept of the present invention to those skilled in the art. The present invention is not limited to the embodiments provided herein, but can be embodied in other ways.

[0028] The technical terms used in this specification are only used to refer to specific embodiments and do not limit the present invention. In addition, the singular form used therein can also include the plural form as long as the sentence does not express an obviously contrary meaning. In addition, the meaning of "including" or "comprising" used in this specification is to concretize specific characteristics, regions, constants, steps, operations, elements or components, and does not exclude the addition of other specific characteristics, regions, constants, steps, operations, elements or components.

[0029] In the present invention, the terms "first", "second", etc. are used to describe various structural elements, and the above terms are used only for the purpose of distinguishing one structural element from other structural elements.

[0030] Furthermore, the terms used in this specification are only used to illustrate exemplary embodiments and do not limit the present invention. Singular expressions include plural expressions as long as they are not clearly different in context. In this specification, the terms "including", "having" or "having" are used to specify the existence of implemented features, numbers, steps, structural elements or their combinations, and it should be understood that the existence or possibility of adding one or more other features or numbers, steps, structural elements or their combinations is not excluded in advance.

[0031] The present invention can be modified in many ways and can have many forms. Specific embodiments are exemplified and described in detail below. However, this does not limit the present invention to a specific disclosure form, but should be understood to include all changes, equivalent solutions and even alternative solutions included in the thought and technical scope of the present invention.

[0032] Hereinafter, the anti-ultraviolet film for buildings and automobiles which can block 100% of ultraviolet rays and blue light according to the present invention will be described in detail one by one.

[0033] The invention relates to an anti-ultraviolet film for buildings and automobiles, and more specifically to an anti-ultraviolet film for buildings and automobiles which can 100% prevent ultraviolet rays and blue light.

[0034] The above-mentioned UV protection film for buildings and automobiles includes a transparent substrate layer and a UV protection layer formed on the above-mentioned transparent substrate layer.

[0035] The transparent substrate layer is a member that supports the UV protection film and may have a visible light transmittance of 70% or more. The material used for the transparent substrate layer is not particularly limited as long as the above transmittance is satisfied.

[0036] Specifically, the transparent substrate layer is formed of a transparent polymer resin, and is particularly preferably formed of a transparent ultraviolet curable resin to prevent the user's field of vision from being blocked.

[0037] For example, the transparent substrate layer may be made of any one or more transparent polymer resins selected from the group consisting of polyester, acrylic, cellulose, polyolefin, polyvinyl chloride, polycarbonate, phenol, and polyurethane.

[0038] For example, the transparent polymer resin is preferably an acrylic, polyester, or polycarbonate resin having a good balance between heat resistance and flexibility, and more preferably a biaxially stretched polyester or polycarbonate resin.

[0039] For example, although the thickness of the substrate layer is not particularly limited, it may be 5 um or more, 10 um or more, 20 um or more, or 30 um or more, and the upper limit thereof may be 150 um or 200 um.

[0040] Based on this, the light transmittance of the above-mentioned ultraviolet protection film at a wavelength of 100 to 400 nm is 0%.

[0041] That is, the above-mentioned UV protection film has the effect of not only 100% blocking the wavelength of 100 to 380nm, which is the ultraviolet region, but also 100% blocking the blue light region with strong energy in the visible light region, especially blocking the purple-blue wavelength region in the wavelength region of 380 to 400nm.

[0042] Therefore, the anti-ultraviolet film according to the present invention blocks blue light to block the glare generated from the glass window and provides clear visibility, thereby reducing the fatigue of the user's eyes. By blocking the 300-400nm wavelength region in the visible field of view of insects, insects can be blocked from seeing the light inside buildings or cars, thereby preventing or reducing the entry of pests.

[0043] The UV protection layer is formed on the transparent base layer by sputtering and includes one or more oxides selected from the group consisting of zinc (Zn), titanium (Ti), zirconium (Zr), cesium (Cs) and silicon (Si).

[0044] The above-mentioned sputtering method refers to a method in which a sputtering gas is injected into a chamber formed by a vacuum atmosphere to generate plasma, and then the particles in the above-mentioned plasma collide with the target material to be formed into a film, and the material separated from the target material by the collision is coated on the substrate. Usually, argon (Ar) as an inert gas is used as the sputtering gas. The sputtering system uses the target as the cathode and the substrate as the anode.

[0045] When power is applied, the injected sputtering gas collides with the electrons released from the cathode and ionizes (Ar+). The ions are attracted to the target material, which is the cathode, and collide with the target material. Through this collision, the energy held by the ions is transferred to the target material, and the atoms and molecules of the target material are released into the chamber. The target material released in this way forms a thin film on the substrate.

[0046] The sputtering thin film manufacturing technology can precisely adjust the thickness of the coating layer to tens of nanometers, and the coating process can be easily handled by using a simple mask.

[0047] The above-mentioned UV protection layer includes a metal oxide, and specifically, can also be a structure of two or more thin film layers. The above-mentioned metal oxide can be, for example, a structure having a nanowire, nanosheet, nanotube, nanorod or nanoflower shape.

[0048] The metal oxide is formed on the transparent substrate layer by sputtering and includes one or more oxides selected from the group consisting of zinc (Zn), titanium (Ti), zirconium (Zr), cesium (Cs) and silicon (Si). The metal oxide may include one or more oxides selected from the group consisting of titanium oxide (TiO 2 ), zinc oxide (ZnO), zirconium oxide (ZrO), cesium oxide (CsO), silicon oxide (SiO 2 ) in the group consisting of one or more.

[0049] For example, the above-mentioned UV protection layer can be composed of a titanium oxide layer (TiO 2 ) and a zinc oxide layer (ZnO) are repeated and are formed by two or more thin films.

[0050] For example, the above-mentioned ultraviolet protection layer can be a two-layer structure in which a zinc oxide layer is formed on the above-mentioned transparent substrate layer and a titanium oxide layer is formed on the above-mentioned zinc oxide layer. Different from this, it can be a two-layer structure in which a titanium oxide layer is formed on the above-mentioned transparent substrate layer and a zinc oxide layer is formed on the above-mentioned titanium oxide layer.

[0051] For example, the above-mentioned ultraviolet protection layer can be a three-layer structure in which a zinc oxide layer is formed on the above-mentioned transparent substrate layer, a titanium oxide layer is formed on the above-mentioned zinc oxide layer, and the above-mentioned zinc oxide layer is formed on the above-mentioned titanium oxide layer. Different from this, it can be a three-layer structure in which a titanium oxide layer is formed on the above-mentioned transparent substrate layer, a zinc oxide layer is formed on the above-mentioned titanium oxide layer, and the above-mentioned titanium oxide layer is formed on the above-mentioned zinc oxide layer.

[0052] For example, the UV protection layer may have a multilayer thin film structure of four or five layers by repeatedly laminating the zinc oxide layer and the titanium oxide layer.

[0053] Specifically, the above-mentioned ultraviolet protection layer may include nanowires formed of zinc oxide (ZnO), nanowires formed of titanium oxide (TiO 2 ) or a combination thereof. When the above zinc oxide (ZnO) nanowires and titanium oxide (TiO 2 ) nanosheets, a structure in which the zinc oxide nanowire layer and the titanium oxide nanosheet layer are repeatedly stacked can be formed.

[0054] The zinc oxide nanowires and / or titanium oxide nanosheets are made of zinc oxide and titanium oxide respectively having excellent light shielding effect in the UV region into a structure shape, thereby further increasing the light shielding effect in the UV region in the powder or powder shape.

[0055] For example, the thin film may have a thickness of 30 to 100 nm.

[0056] The above-mentioned anti-ultraviolet film for construction and automobile may further include a super coating layer located on the above-mentioned anti-ultraviolet layer, a functional layer located on the above-mentioned super coating layer, and a protective film located on the above-mentioned functional layer.

[0057] The supercoat can maintain the transmittance to visible light and prevent the light blocking layer, i.e., the infrared protection layer and the ultraviolet protection layer from being damaged. The material of the supercoat is not greatly restricted and the commonly used materials in the field can be used without restriction. For example, the supercoat can include a cured product of a composition comprising a monofunctional or multifunctional photocurable organic compound and inorganic or organic particles.

[0058] The super coating layer may have a thickness of 100 nm or less. When the thickness exceeds the above-mentioned thickness, the transmittance of the window film will be reduced, and the infrared reflection function of the window film will be reduced due to the infrared absorption of the super coating layer.

[0059] The functional layer may be included on the super coating layer. For example, the functional layer may include an anti-blue light layer. The anti-blue light layer includes one or more selected from the group consisting of perylene, porphyrin, coumarin and acrydine.

[0060] The above-mentioned anti-ultraviolet film not only blocks the wavelength of 100 to 380 nm, which is the ultraviolet region, but also blocks 100% of the blue light region, especially the wavelength region of 380 to 400 nm, but can also include a selective functional layer to stably block the blue light region. By placing the above organic functional layers separately, it has the effect of perfectly blocking even the wavelengths that cannot be blocked by the inorganic thin film layer.

[0061] The window film may further include a protective film located on the upper portion of the functional layer. The protective film may protect the window film from external forces or external environment generated during the handling, movement or construction of the anti-ultraviolet film. The protective film may be peeled off from one side of the anti-ultraviolet film without damaging the super coating layer during construction.

[0062] The material of the above-mentioned protective film can use a polymer film known in the relevant technical field. For example, a polyester film of polyethylene terephthalate or polybutylene terephthalate, a polytetrafluoroethylene film, a polyethylene film, a polypropylene film, a polybutylene film, a polybutadiene film, a poly (vinyl chloride) film or a polyimide film or the like can be used. These films can be used as a single layer, or can also be used as a multilayer stacked on each other. Although not particularly limited, the thickness of the above-mentioned protective film can be in the range of 10um to 100um.

[0063] The above-mentioned UV protection film for buildings and automobiles may further include an infrared protection layer on the above-mentioned transparent substrate layer.

[0064] The above-mentioned ultraviolet protection layer and the above-mentioned infrared protection layer can be stacked on the above-mentioned transparent substrate layer in sequence, and can have the following stacked form: as a first example, the above-mentioned ultraviolet protection layer is formed on the above-mentioned transparent substrate layer, and the above-mentioned infrared protection layer is formed on the above-mentioned ultraviolet protection layer, or as a second example, the above-mentioned infrared protection layer is formed on the above-mentioned transparent substrate layer, and the above-mentioned ultraviolet protection layer is formed on the above-mentioned infrared protection layer.

[0065] The architectural and automotive UV protection film according to an embodiment of the present invention may have a thickness of 3 mil or more.

[0066] Hereinafter, the present invention will be described in more detail based on embodiments and experimental examples.

[0067] However, the following examples and experimental examples are merely for illustrating the present invention, and the contents of the present invention are not limited to the following examples and experimental examples.

[0068] Example 1

[0069] A transparent glass substrate (corning 1747) as a transparent substrate was introduced into a dry deposition machine for fixation at about 110- 7 If the pressure condition of the above deposition machine is met, argon (10 sccm) is injected into the deposition machine to maintain a vacuum of 110- 3 The RF / DC sputtering method was used to deposit titanium oxide (TiO) on the transparent glass substrate in an average thickness of 25 nm and 20 nm, respectively. 2 ) and zinc oxide (ZnO). At this time, titanium oxide (TiO 2 ) is deposited at a deposition rate of 5 nm / min, and zinc oxide (ZnO) is deposited at a deposition rate of 4 nm / min, thereby forming an ultraviolet protection layer.

[0070] Example 2

[0071] Titanium oxide (TiO) was deposited on a transparent glass substrate by RF / DC sputtering to have an average thickness of 25 nm, 20 nm, and 25 nm, respectively. 2 ), zinc oxide (ZnO) and titanium oxide (TiO 2 ), except for this, an ultraviolet protection film was manufactured in the same manner as in the above-mentioned Example 1.

[0072] Example 3

[0073] Zinc oxide (ZnO) and titanium oxide (TiO) were deposited on a transparent glass substrate by RF / DC sputtering to have an average thickness of 20 nm and 25 nm, respectively. 2 ), except for this, an ultraviolet protection film was manufactured in the same manner as in the above-mentioned Example 1.

[0074] Example 4

[0075] Zinc oxide (ZnO), titanium oxide (TiO) and quartz crystals were deposited on a transparent glass substrate by RF / DC sputtering to have average thicknesses of 20 nm, 25 nm and 20 nm, respectively. 2 ) and zinc oxide (ZnO), an ultraviolet protection film was manufactured in the same manner as in Example 1.

[0076] Comparative Example 1

[0077] An ultraviolet shielding film was produced in the same manner as in Example 1, except that two layers of zinc oxide (ZnO) were deposited on the transparent glass substrate by RF / DC sputtering so as to have average thicknesses of 20 nm and 20 nm, respectively.

[0078] Comparative Example 2

[0079] Two layers of titanium oxide (TiO) were deposited on a transparent glass substrate by RF / DC sputtering to have average thicknesses of 25 nm and 25 nm, respectively. 2 ), except for this, an ultraviolet protection film was manufactured in the same manner as in the above-mentioned Example 1.

[0080] The optical properties of the film according to the above example were tested according to KS L 2016:2014, 6.3, and the results are shown in the following Table 1. The test environment was maintained at a temperature of 21-25° C. and a humidity of 60-65% RH.

[0081] Table 1

[0082]

[0083] Here, ultraviolet light means a wavelength region of 100 to 380 nm, and blue light means a wavelength region of 380 to 400 nm.

[0084] The ultraviolet light transmittance and blue light transmittance of the ultraviolet light protection film according to the example were both 0%, while the ultraviolet light transmittance of the comparative example was 1.5% or more and the blue light transmittance was 4.6% or more.

[0085] That is, the ultraviolet light blocking film of the present invention has an effect of blocking 100% of the transmittance in the wavelength region of 100 to 400 nm, which is a part of the ultraviolet region and the blue light region.

[0086] The above description of the present application is for illustration, and a person skilled in the art of the present application can understand that it can be easily transformed into other specific forms without changing the technical ideas or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all aspects, rather than restrictive. For example, each structural element described in a single type can also be implemented in a dispersed manner. Similarly, the structural elements described as dispersed can also be implemented in a combined manner.

[0087] The scope of the present application is indicated by the appended claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present application.

Claims

1. An anti-ultraviolet film for buildings and automobiles, characterized in that: include: a transparent substrate layer; as well as The UV protection layer is formed on the transparent substrate layer by sputtering and includes one or more oxides selected from the group consisting of zinc, titanium, zirconium, cesium and silicon. The light transmittance at a wavelength of 100 to 420 nm is less than 5%.

2. The anti-ultraviolet film for buildings and automobiles according to claim 1, characterized in that: The anti-ultraviolet layer is formed by repeating a titanium oxide layer and a zinc oxide layer and is composed of two or more thin films. The film has a thickness of 30 to 100 nm.

3. The anti-ultraviolet film for buildings and automobiles according to claim 1, characterized in that: Also includes: A super coating layer, located on the anti-ultraviolet layer; A functional layer, located on the super coating layer; The protective film is located on the functional layer.

4. The anti-ultraviolet film for buildings and automobiles according to claim 3, characterized in that: The functional layer includes a blue light protection layer, and the blue light protection layer includes at least one selected from the group consisting of perylene, porphyrin, coumarin, and acrydine.

5. The anti-ultraviolet film for buildings and automobiles according to claim 1, characterized in that: Also includes: The infrared ray blocking layer is located on the transparent substrate layer.

6. The anti-ultraviolet film for buildings and automobiles according to claim 1, characterized in that: The thickness of the film is 3 mil or more.

7. The anti-ultraviolet film for buildings and automobiles according to claim 1, characterized in that: The transmittance at wavelength 100-400nm is 0%.

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