KR101146715B1 - Retro-reflection sheet, and bead wallpaper - Google Patents

Abstract

Retroreflective sheeting is disclosed. The retroreflective sheet includes a transmissive portion including a plurality of transmissive bodies coated with a photocatalyst on at least a portion thereof, and a base layer formed on one surface of the transmissive portion. Accordingly, it is possible to provide a pollution purification function.

Description

Retro-reflection sheet, and bead wallpaper}

The present invention relates to a retroreflective sheet and a bead wallpaper, and more particularly, to a retroreflective sheet and a bead wallpaper having a contaminant purification function.

Retroreflective sheets capable of retroreflection are attached to various traffic safety facilities such as various traffic signs, marker bottles, delegators, tripods, and safety clothing, cars, bicycles, hats, shoes, etc. that require visibility at night. Here, retroreflective means returning the light incident from the front toward the light source which projected the light.

Conventionally, retroreflectors using glass beads or microprisms have been mainly used as retroreflectors. However, these retroreflectors have a problem in that the luminance is low due to the low retroreflectivity expressed as the ratio of the retroreflective light to the incident light.

For example, the conventional retroreflector using glass beads has a problem that the reflection layer is coated only on one surface of the glass beads so that the range of incident angles that can be retroreflected according to the attachment angle of the glass beads is very narrow.

In addition, when the retroreflective sheet is installed in a high place, such as when used as a material for the air mark of the airport, or a location difficult to reach humans, there was a problem that it is difficult to maintain and manage.

In addition, similar to the retroreflective sheet, bead wallpaper using beads has a problem in that the aesthetic function is poor by simply applying beads on the resin.

The present invention is to solve the above-mentioned problems, an object of the present invention to provide a retroreflective sheet and bead wallpaper having a contamination purification function using beads coated with a photocatalyst.

In order to achieve the same purpose as the image includes at least a portion in accordance with an embodiment of the present invention includes a transmission portion comprising a plurality of transmission body coated with a photocatalyst, and a base layer formed on one surface of the transmission portion.

Here, the transparent body may be at least one of a bead and a prism.

In addition, the base layer, the adhesive layer, the surface facing the transmissive portion may be coated with a photocatalyst.

The light emitting device may further include a reflector formed on at least one of an inner side and an outer side of the transmissive body, and configured to retroreflect light transmitted through the transmissive body and incident in multiple directions.

The transmission part may include a first transmission part disposed on one surface of the transmission part and a second transmission part disposed on the other surface of the transmission part, and the reflection part may transmit light incident through the first transmission part and the second transmission part. It can reflect in each direction of incidence.

In addition, it may further include a protective layer disposed on the transmission portion to improve the durability of the transmission portion.

In addition, the outdoor display device according to an embodiment of the present invention includes a structure formed in a circular or multi-faced shape, and a retroreflective sheet having one of the above-described configurations attached to an outer surface of the structure.

In addition, the bead wallpaper according to another embodiment of the present invention includes a transmission part including a plurality of beads coated with a photocatalyst on at least a portion and a predetermined pattern coated with a photoluminescent material, the base layer formed on one surface of the transmission part Include.

In addition, the base layer, the surface facing the transmission portion may be coated with a photocatalyst.

The apparatus may further include a variable coating layer formed on one surface of the transmission part and formed of a material having a characteristic variable according to at least one of humidity and temperature.

Accordingly, there is an effect that the maintenance and management of the facility is easy by purifying contaminants and preventing contamination by the function of the photocatalyst coated on the retroreflective sheet. In addition, through the photoluminescent material applied to the predetermined pattern of the bead wallpaper there is an effect that can improve the aesthetic function, cyanness by emitting only the pattern in the absence of light.

1 is a view for explaining the configuration of a retroreflective sheet using beads for the understanding of the present invention.
2A to 2C are views illustrating various configurations of a retroreflective sheet using beads according to an embodiment of the present invention.
3A and 3B are views illustrating various configurations of a retroreflective sheet using beads according to another embodiment of the present invention.
4A and 4B are diagrams for describing a retroreflective form using a prism for better understanding of the present invention.
5A to 5C are views illustrating various configurations of a retroreflective sheet using a prism according to another embodiment of the present invention.
6A and 6B are views illustrating a configuration of a retroreflective sheet using a prism according to another embodiment of the present invention.
7 is a cross-sectional view showing the configuration of the bead wallpaper according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 is a view for explaining the configuration of a retroreflective sheet using beads for the understanding of the present invention. In order to facilitate understanding of the present invention, the configuration and manufacturing method of the retroreflective sheet will be briefly described with reference to FIG. 1.

As shown in FIG. 1, in the retroreflective sheet used in the present invention, a reflector 20 is formed on an upper surface of the base layer 30, and a bead layer 10 is formed on an upper surface of the reflector 20. It is a structure. Here, the reflector 20 may be formed of a metal having a high reflectance such as, for example, aluminum, and the bead layer 10 may be formed of transparent beads serving as lenses such as glass beads and ceramic beads.

In addition, the protective film 40 may be stacked on the top surface of the bead layer 10. Here, the protective film 40 serves to protect the bead layer 10 in the distribution process of the retroreflective sheet, it may be separated when the retroreflective sheet is attached.

The base layer 30 may be formed in a shape including an adhesive. For example, the retroreflective sheet may be attached to a skin complex such as a garment or a hat. In this case, first, the retroreflective sheet is cut into a predetermined shape, and the adhesive sheet of the sheet is placed in contact with the surface of the adherend. Can be. Here, the adhesive can be for example a hot melt adhesive. Alternatively, the base layer may be implemented in a form including a primer or the like.

In some cases, an adhesive layer may be provided separately from the base layer 30.

Hereinafter, an exemplary method of manufacturing the retroreflective sheet of the type shown in FIG. 1 will be briefly described.

First, a release agent is applied onto a PE-based device, for example, a protective film 40 made of PET, and then the bead layer 10 is formed using glass beads thereon. Specifically, transparent beads such as glass beads and ceramic beads are mixed with a solution in which an organic solvent and a urethane resin are mixed, and the mixed solution is applied to the upper surface of the protective film 40 and dried to form the bead layer 10. Can be. In this case, since the urethane resin is considerably diluted by an organic solvent, the urethane resin flows down the surface of the transparent beads, filling the voids between the transparent beads and the protective film 40 as well as filling the voids between the transparent beads. Transparent beads are effectively attached to the upper surface of the protective film. Here, the protective film 40 may be made of a PE-based material, that is, a material such as polyester (PET), in some cases, may be made of a synthetic resin material such as PVC, PP.

Subsequently, aluminum or ceramic powder is attached to the upper surface of the bead layer 10 by vapor deposition or the like to form the reflecting portion 20. When the reflecting portion 20 is formed in this way, the retroreflective effect by the bead layer 10 is achieved. Will rise. Meanwhile, in the present exemplary embodiment, the reflector 20 is described as being formed outside the beads constituting the bead layer 10. However, this is only an example, and the reflector 20 is formed inside each bead. It may be formed.

Then, the base layer 30 is formed on the reflecting portion 20. The base layer 30 may be formed of, for example, a urethane resin, and a solvent is mixed with the urethane resin to be coated on the reflector 20.

In some cases, the base layer 30 may be formed of an adhesive layer, or a hot melt adhesive layer (not shown) may be separately formed on an upper surface of the base layer 30. Here, as the hot melt adhesive used as the material of the adhesive, ethylene-acetic acid, polyethylene EVA, etc. may be used as the base polymer.

On the other hand, the above-described method is only an embodiment, it can be manufactured in the order of the base layer 30, the reflector 20, the bead layer 10 of course.

2A to 2C are views illustrating various configurations of a retroreflective sheet using beads according to an embodiment of the present invention.

Meanwhile, the retroreflective sheet illustrated in FIGS. 2A to 2C may further include the components illustrated in FIG. 1 in addition to the illustrated components, in which case the description of each component is the same as illustrated in FIG. 1. . In addition, the overlapping parts of the components illustrated in FIG. 1 among the components illustrated in FIGS. 2A to 2C may be manufactured by a method similar to the method described with reference to FIG. 1.

As shown in FIG. 2A, the retroreflective sheet according to the exemplary embodiment includes a base layer 30, a bead layer 10, and a photocatalytic layer 11 coated on the bead layer 10.

The bead layer 10 is made of fine bead-shaped glass grains, and uses an appropriate diameter according to the characteristics of use, and glass beads are laminated by an appropriate laminating means such as a roller. For example, the bead layer 10 may be applied to an appropriate thickness using a few to several hundred mesh (bead). However, since the numerical value is only one embodiment, the thickness of the reflector is not limited to the numerical value described above.

The photocatalyst layer 11 may be formed on the upper surface of the bead layer 10. Here, the photocatalyst refers to a substance which does not change before or after the reaction but activates a chemical reaction by absorbing light, and may be, for example, titanium dioxide (TiO ₂ ).

Specifically, when the photocatalyst receives ultraviolet rays such as sunlight or fluorescent lamps, electrons (e−) with electricity and holes (h +) with + electricity are formed as in the principle of solar cells. Among them, the hole (h +) forms a particularly powerful oxidizing hydroxide (OH Radical), which has a stronger oxidizing power than chlorine for sterilization or ozone hypochlorite. In addition, the electrons generate oxygen ions adsorbed on the photocatalyst to oxygen ions, which generate intermediates and peroxides of the oxidation reaction or water reaction through hydrogen peroxide. According to the above reaction, the photocatalytic effect has an antifouling effect, an air purification effect, a water purification effect, a sterilization effect and an odor removal effect.

The base layer 30 may be formed of synthetic resin such as polyvinyl chloride (PVC), polyurethane (polyurethane), PU (polyethylene, polyethylene), or the like. In some cases, the base layer 30 may further include a softening additive such as natural rubber and artificial rubber to improve the flexibility of the retroreflective sheet.

As shown in FIG. 2B, the retroreflective sheet may be included in the base layer 30 shown in FIG. 2A or may further include a photocatalytic layer 12 formed on the base layer 30. For example, the photocatalyst layer 11 may be applied on the base layer 30, or the photocatalyst material may be mixed with a material forming the base layer 30, for example, an adhesive, to form the base layer 30.

Alternatively, the photocatalytic layer 11 formed on the bead layer 10 shown in FIG. 2A is not provided, and is included in the base layer 30 shown in FIG. 2A or formed on the base layer 30. 12) it may be implemented in a form having only.

In addition, as shown in FIG. 2C, the retroreflective sheet may further include a reflector 20 and a protective layer 50 in addition to the configuration shown in FIG. 2A.

The reflector 20 may be formed by uniformly applying silver or the like using aluminum paste by vacuum deposition. Here, the reflector 20 is applied to an appropriate thickness according to, for example, the diameter of the bead, so that the light irradiated to the bead layer 10 is applied so as to transmit and reflect as much as possible.

Meanwhile, in the present exemplary embodiment, although the reflector 20 is formed on the bottom of the bead layer 10, the photocatalyst layer 12 illustrated in FIG. 2B may be formed on the bottom of the bead layer 10.

The protective layer 50 functions to protect the bead layer 10 to improve durability, and may be formed of a transparent resin series. For example, the protective layer 50 may be a transparent resin such as polyvinyl chloride (PVC), polyvinyl chloride), PU (polyurethane, polyurethane), PE (polyethylene, polyethylene), or the like. Although the protective layer 50 is provided to cover the entire upper portion of the bead in the figure, it can be partially coated. On the other hand, the protective layer 50 may serve to enhance the brightness in addition to the function of protecting the bead layer 10.

In addition, although not shown in the drawings, the retroreflective sheet according to another embodiment of the present invention may be implemented in a form having a bead layer coated with a photocatalyst on both sides of the base layer 30.

Meanwhile, in the embodiment illustrated in FIGS. 2A to 2C, the photocatalyst layer 11 is formed on the top surface of the bead layer 10. However, this is only an example, and the photocatalytic layer 11 is the bead layer 10. It is also possible to be implemented in the form of being laminated on the base layer 30 is coated on the front of each bead constituting the).

3A and 3B are views illustrating various configurations of a retroreflective sheet using beads according to another embodiment of the present invention.

According to FIG. 3A, in the retroreflective sheet, the first glass bead layer 10 is formed on one surface of the base layer 30, and the second glass bead layer 10 ′ is formed on the other surface of the base layer 30. Can be. Accordingly, as shown, not only the retroreflective light A 'is incident on the A direction but also the retroreflective light B' is also incident on the B direction. In other words, when the retroreflective sheet is adhered to the skin complex, the incident light can be efficiently retroreflected regardless of which direction is adhered to both sides.

In addition, each bead constituting the first glass bead layer 10 and the second glass bead layer 10 'may be coated with photocatalyst layers 11 and 11'.

Alternatively, the first retroreflective sheet and the second retroreflective sheet of the type shown in FIG. 2A may be fabricated in such a manner that the respective base layers 30 face each other. Even in this case, the retroreflective sheet not only retroreflects the light incident in the A direction (A '), but also retroreflects the light incident in the B direction (B').

As shown in FIG. 3B, the retroreflective sheet may include reflection parts 20 and 20 ′ in addition to the base layer 30, the bead layers 10 and 10 ′ and the photocatalyst layers 11 and 11 ′ shown in FIG. 3A. It may further include.

Specifically, the photocatalyst layers 11 and 11 'are coated on the upper surfaces of the bead layers 10 and 10', and the reflector 20 is disposed on the lower surface of the bead layers 10 and 10 'or the upper surface of the base layer 30. , 20 ') may be formed.

The reflectors 20 and 20 'are formed by attaching aluminum or ceramic powder to one surface of the photocatalyst layers 11 and 11' by vapor deposition or the like. When the reflectors 20 and 20 'are formed, the bead layer ( 10, 10 ') increases the retroreflective effect.

In addition, although not shown in the drawings, a protective layer (not shown) may be formed on the catalyst layers 11 and 11 'coating the upper surfaces of the bead layers 10 and 10'.

The protective layer (not shown) functions to protect the bead layers 10 and 10 'to improve durability, and may be formed of a transparent resin series. For example, the protective layer (not shown) may be a transparent resin such as PVC (polyvinyl chloride), polyvinyl chloride), PU (Polyurethane, polyurethane), PE (Polyethylene, polyethylene) and the like.

In addition, the protective layer (not shown) may be provided to cover the entire upper portion of the bead layer (10, 10 '), of course, may be partially coated. Meanwhile, the protective layers 50 and 50 'may also serve to enhance the luminance in addition to the function of protecting the bead layers 10 and 10'. .

In some embodiments, a reflective resin layer (not shown) may be formed on the reflective parts 20 and 20 '. The reflective resin layer may be transparent or have various colors, and may have a form in which graphics are formed in a single color. If the reflective resin layer is transparent, it has only the most basic retroreflective function. If it has a color, it performs the retroreflective function to express a specific color. Etc. can be expressed.

In addition, a large amount of reflecting medium such as pearl may be dispersed in a fine form between the beads constituting the bead layers 10 and 10 '.

In addition, each component illustrated in FIGS. 2A to 2C, 3A, and 3B may be partially deleted, and the arrangement order thereof may be changed according to various embodiments. For example, the base layers 30 and 30 'may be omitted or implemented in a form including an adhesive.

4A and 4B are diagrams for describing a retroreflective form using a prism for better understanding of the present invention.

As shown in FIG. 4A, the microprism applied to the present invention may have a shape in which each cube corner is composed of three right angled isosceles triangles to retroreflect incident light. Alternatively, as shown in FIG. 4B, each cube corner may be configured as three square faces. However, the shapes shown in FIGS. 4A and 4B are just exemplary embodiments, and various prismatic shapes (for example, cones) capable of retroreflection may be applied to the present invention.

In the present invention, for convenience of description, the configuration will be described based on the configuration using the microprism shown in FIG. 4A, but the example described below may be applicable to the form shown in FIG. 4B.

5A to 5C are views illustrating various configurations of a retroreflective sheet using a prism according to another embodiment of the present invention.

As shown in FIG. 5A, a retroreflective sheet according to another embodiment of the present invention includes a base layer 80, a prism layer 60, and a photocatalytic layer 61.

Prism layer 60 is a cross-sectional structure of a fine triangular prism shape is formed continuously up, down, left and right, using a prism of the appropriate size according to the characteristics of the use, and processed super precisely using a laser beam or the like, acrylic, rubber It may be attached to the base layer 80 using an adhesive or the like.

The photocatalyst layer 61 may be coated on the top surface of the prism layer 60. Alternatively, in some cases, the photocatalyst layer 61 may be formed to coat the entire surface of each prism constituting the prism layer 60.

The base layer 80 may be formed of a synthetic resin such as polyvinyl chloride (PVC), polyurethane (polyurethane), PU (polyethylene, polyethylene), or the like. In some cases, the base layer 80 may further include a softening additive such as natural rubber and artificial rubber to improve the flexibility of the retroreflective sheet.

As shown in FIG. 5B, the retroreflective sheet may be included in the base layer 80 illustrated in FIG. 5A, or may further include a photocatalytic layer 62 formed on the base layer 80. For example, the photocatalytic layer 62 may be formed on the base layer 80, or the photocatalytic material may be mixed with a material forming the base layer 80, for example, an adhesive, to form the base layer 80.

Alternatively, the photocatalyst layer 61 formed on the prism layer 60 shown in FIG. 5A is not provided, and is included in the base layer 80 shown in FIG. 2A or formed on the base layer 80 ( 62) it may be implemented in a form having only.

In addition, as shown in FIG. 5C, the retroreflective sheet may further include a reflector 70 and a protective layer 90 in addition to the configuration illustrated in FIG. 5A. Meanwhile, although FIG. 5C illustrates that the reflector 70 and the protective layer 90 are both included, this is only an example, and in some cases, only one of them may be included.

The reflector 70 may be formed by uniformly applying silver using an aluminum paste by vacuum deposition. Here, the reflector 70 is applied to an appropriate thickness, for example, according to the diameter of the bead, but is applied so that the light irradiated to the prism layer 60 to reflect as much as possible.

Meanwhile, in the present exemplary embodiment, the reflector 70 is formed on the bottom of the prism layer 60, but according to another exemplary embodiment, the reflective part 70 may be formed on the bottom of the photocatalytic layer 62 illustrated in FIG. 5B.

The protective layer 90 functions to protect the prism layer 60 to improve durability, and may be formed of a transparent resin series. For example, the protective layer 90 may be a transparent resin such as polyvinyl chloride (PVC), polyurethane (polyurethane), PU (polyethylene, polyethylene), or the like. Although the protective layer 90 is provided to cover the entire upper portion of the prism layer 60 in the drawing, it may be partially coated. On the other hand, the protective layer 90 may serve to enhance the brightness in addition to the function of protecting the prism layer 60.

In addition, although not shown in the drawings, the retroreflective sheet according to another embodiment of the present invention may be implemented in a form having a bead layer coated with a photocatalyst on both sides of the base layer 80.

Meanwhile, although the photocatalyst layer 61 is formed on the upper surface of the prism layer 60 in the embodiment illustrated in FIGS. 5A to 5C, this is only an example, and the photocatalytic layer 61 is the prism layer 60. It is also possible to be implemented in the form of being laminated on the base layer 80 is coated on the front of each bead constituting the).

6A and 6B are views illustrating a configuration of a retroreflective sheet using a prism according to another embodiment of the present invention.

According to FIG. 6A, in the retroreflective sheet, the first prism layer 60 may be formed on one surface of the base layer 80, and the second prism layer 60 ′ may be formed on the other surface of the base layer 80. have. Accordingly, as shown, not only the retroreflective light A 'is incident on the A direction but also the retroreflective light B' is also incident on the B direction. In other words, when the retroreflective sheet is adhered to the skin complex, the incident light can be efficiently retroreflected regardless of which direction is adhered to both sides.

In addition, each prism constituting the first prism layer 60 and the second prism layer 60 'may be coated with photocatalyst layers 61 and 61'.

Alternatively, the first retroreflective sheet and the second retroreflective sheet of the type shown in FIG. 5A may be fabricated in such a manner that the respective base layers 80 face each other. Even in this case, the retroreflective sheet not only retroreflects the light incident in the A direction (A '), but also retroreflects the light incident in the B direction (B').

As shown in FIG. 6B, the retroreflective sheet may include reflecting parts 70 and 70 ′ in addition to the base layer 80, the prism layers 60 and 60 ′ and the photocatalytic layers 61 and 61 ′ shown in FIG. 6A. It may further include.

Specifically, the photocatalyst layers 61 and 61 'are coated on the upper surfaces of the prism layers 60 and 60', and the reflecting portions are formed on the lower surface of the prism layers 60 and 60 'or the upper surface of the base layer 80. 70, 70 ') can be formed.

The reflective parts 70 and 70 'are formed by attaching aluminum or ceramic powder to one surface of the photocatalyst layers 61 and 61' by vapor deposition or the like. When the reflective parts 70 and 70 'are formed, the prism layer ( 60, 60 '), the retroreflective effect is increased.

In addition, although not shown in the drawings, a protective layer (not shown) may be formed on the catalyst layers 61 and 61 'coating the upper surfaces of the prism layers 60 and 60'.

The protective layer (not shown) serves to improve durability by protecting the prism layers 60 and 60 ', and may be formed of a transparent resin series. For example, the protective layer (not shown) may be a transparent resin such as PVC (poly (vinyl chloride), polyvinyl chloride), PU (Polyurethane, polyurethane), PE (Polyethylene, polyethylene) and the like.

Meanwhile, although a protective layer (not shown) may be provided to cover the entire upper portion of the prism layers 60 and 60 ', it may be partially coated. On the other hand, the protective layer (not shown) may serve to enhance the brightness in addition to the function of protecting the prism layers 60 and 60 '.

In some embodiments, a reflective resin layer (not shown) may be formed on the reflective parts 70 and 70 '. The reflective resin layer may be transparent or have various colors, and may have a form in which graphics are formed in a single color. If the reflective resin layer is transparent, it has only the most basic retroreflective function. If it has a color, it performs the retroreflective function to express a specific color. Etc. can be expressed.

In addition, a diffraction grating layer capable of diffracting incident light may be further formed between the protective layer (not shown) and the prism layers 60 and 60 '.

In addition, a large amount of a reflective medium such as pearl may be dispersed between the prisms constituting the prism layers 60 and 60 '.

In addition, a transparent TUI sheet or the like may be further formed on the adhesive layer.

In addition, on the other surface on which the prism layers 60 and 60 'are formed, a diffuse reflection surface composed of fine grooves having different angles of formation can be formed. Accordingly, the night reflection is excellent as well as various characters and figures are generated by the diffuse reflection surface. It can be configured to be highlighted.

In addition, each component illustrated in FIGS. 5A to 5C, 6A, and 6B may be partially deleted, and the arrangement order thereof may be changed according to various embodiments. For example, the base layers 80 and 80 ′ may be omitted or implemented in a form including an adhesive.

Meanwhile, the prisms shown in FIGS. 4A and 4B may be attached to a base layer (not shown) to form a prism layer, and in some cases, the prisms may be used by only the prism itself.

Meanwhile, a retroreflective body may be formed by cutting a plurality of retroreflective sheets including beads or prisms of the types shown in FIGS. 2A to 2C, 3A and 3B, 5A to 5C, and 6A and 6B.

In addition, a display panel for various uses by applying a retroreflector formed by cutting a plurality of retroreflective sheets including beads or prisms of the shapes shown in FIGS. 2A to 2C, 3A and 3B, 5A to 5C, 6A, and 6B. Can be produced.

In addition, an outdoor display device may be manufactured by applying a retroreflective sheet including a bead or prism having a shape shown in FIGS. 2A to 2C, 3A and 3B, and 5A to 5C, 6A and 6B on an outer surface of the structure. . In this case, the structure can be circular or multi-faced.

Further, the retroreflective sheet including beads or prisms of the type shown in FIGS. 2A-2C, 3A and 3B, 5A-5C, 6A and 6B can be made into a polyhedral shape by itself.

In addition, a retroreflective sheet including beads or prisms of the type shown in FIGS. 2A-2C, 3A and 3B, 5A-5C, 6A and 6B can also be used for lines or shapes in roads.

Meanwhile, in the above-described embodiment, only various embodiments of the retroreflective sheet have been described, but various embodiments of the present invention can be used for making a wallpaper.

7 is a cross-sectional view showing the configuration of the bead wallpaper according to an embodiment of the present invention.

According to FIG. 7, the bead wallpaper comprises a base paper layer 5, a synthetic resin foam layer 4, a printing layer 3, an adhesive layer 2, a bead layer 1 and a photocatalyst coating layer 1 ′ from below.

The synthetic resin foam layer 4 may be formed by coating the synthetic resin composition on the base paper layer (or base layer) 5 and then heating and gelling the foam. When the gel is released after release, it turns into a solid composition to form a synthetic resin foam layer (4).

The printing layer 3 may have a structure in which a predetermined pattern is formed on the synthetic foam layer 5 by conventional gravure printing, flexo printing, offset printing, or screen printing. have. Here, the photoluminescent material may be applied to the predetermined pattern. As a result, only a predetermined pattern is emitted in a place where light is absent, thereby improving aesthetic function and cyanity.

The adhesive layer 2 is coated with a thin film of an aqueous or oily adhesive by a coating wiping method using a pressing roll on a pattern of the printing layer 3, for example, an uneven emboss pattern, to form an adhesive layer 2. Form.

Description of the structure, function, and placement of the photocatalyst coating layer 1 'having the bead layer 1 and the bead layer 1 formed thereon is described for the bead layers 10 and 10' of the retroreflective sheet described above. Duplicated with, so detailed description is omitted. For example, in some cases, the adhesive layer 2 may be formed to include a photocatalytic material.

Although not shown in the drawings, a variable coating layer (not shown) may be further formed on the photocatalyst coating layer 1 '.

The variable coating layer (not shown) may be implemented as a functional layer that recognizes at least one of humidity and temperature, and includes a porous moisture absorbent coated or deposited with a cobalt compound such as an organic dye or cobalt chloride. Hereinafter, a case in which the variable coating layer (not shown) is implemented as a humidity recognition layer capable of recognizing humidity will be described as an example.

The humidity recognition layer (not shown) is formed in two ways, namely, by forming a porous moisture absorbent coated or deposited with a cobalt compound or an organic dye on the photocatalyst coating layer 1 ', or by coating a cobalt compound or an organic dye. Alternatively, the deposited porous moisture absorbent may be liquefied to form a coating on the photocatalyst coating layer 1 '.

On the other hand, a binder may be used to form a humidity recognition layer (not shown), and as a resin usable as a binder, any one or two or more of acrylic resin, PVC resin, urethane resin, and phenol resin may be used. The organic solvent may be added according to viscosity control and other operations.

The porous moisture absorbent is a substance having a humidity control function and a water absorption decomposition function of harmful substances, and silica gel, alumino-silicate beads, zeolite, and the like may be used.

Cobalt compounds or organic dyes are substances that change color with humidity and are neutral red, phenol red, bromothymol blue, phenolphthalein, cresol red, thymol blue, bromocresol green, bromocresol purple, bromocresol Various organic dye indicators, such as blue and methyl red, can be used. Accordingly, due to the color change due to humidity, it is possible to get out of the existing monotonous pattern by giving the interfacial effect.

Meanwhile, in the present embodiment, the printing layer 3 has been described as having a predetermined pattern, but this is only an embodiment, and the predetermined pattern may be formed in the adhesive layer 2 or in another layer. have. In addition, according to various embodiments, some layers illustrated in FIG. 8 may be omitted.

As described above, the bead wallpaper coated with the photocatalyst may alleviate the sick house syndrome or bring about an air pollution purification effect. In addition, the bead wallpaper containing the phosphorescent material is applied to the wallpaper of large buildings, apartments, houses and public facilities, and has an emergency induction function in case of power failure, and can provide a guide function when turning off the power everyday or turning off at midnight. It becomes possible.

Meanwhile, the retroreflective sheet manufactured as described above, a retroreflective body using the same, and an outdoor display device can secure high visibility and a safe location at a place having a traffic volume, a work construction site, and a place requiring sharpness. . In addition, it can be used in advertising sheets, billboards, signs and various structures that require retroreflective on both sides. In addition, the retroreflective sheet according to the present invention can be used as a material such as clothing, fishing goods, bags, hats, shoes, consumer goods, safety jackets, road markings, traffic signs, firefighting articles and the like.

Accordingly, there is an effect that the maintenance and management is easy by pollutant purification and pollution prevention by the function of the photocatalyst coated on the retroreflective sheet. In particular, when installed at a high place for the air mark of the airport can be given a photocatalytic function to clean itself, there is an effect that it is easy to maintain and repair.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the above-described specific embodiment, the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

10: bead, bead layer 20, 70: reflector
30, 80: base layer 90: protective film
50, 90: protective layer 60: prism, prism layer
11, 12, 61, 62: photocatalyst layer

Claims (10)

A transmission part including a plurality of transmission parts coated with a photocatalyst at least in part; And
And a base layer formed on one surface of the transmission part.
The base layer, the retroreflective sheet comprising an adhesive layer, the surface facing the transmissive portion is coated with a photocatalyst. The method of claim 1,
The transparent body,
A retroreflective sheet, characterized in that it is at least one of a bead and a prism. delete The method of claim 1,
And a reflector formed on at least one of an inner side and an outer side of the transmissive body, and reflecting the retroreflected light passing through the transmissive body in multiple directions. A transmission part including a plurality of transmission parts coated with a photocatalyst at least in part;
A base layer formed on one surface of the transmission part; And
A reflection part formed on at least one of an inner side and an outer side of the transmissive body and retroreflecting light incident through the transmissive body in a multi-direction;
The transmission part includes a first transmission part disposed on one surface of the transmission part and a second transmission part disposed on the other surface of the transmission part,
And the reflecting unit reflects the light incident through the first transmission unit and the second transmission unit in each incident direction. The method of claim 1,
And a protective layer disposed on the transmission part to improve durability of the transmission part. Structures formed in a circular or polyhedron shape; And,
7. The outdoor display device of claim 1, wherein the retroreflective sheet of claim 1 is attached to an outer surface of the structure. A transmission part including a plurality of beads coated at least in part with a photocatalyst; And
And a base layer formed on one surface of the transmissive part, the predetermined pattern having a photoluminescent material applied thereon. The method of claim 8,
The base layer,
Bead wallpaper, characterized in that the surface facing the transmissive portion is coated with a photocatalyst. 10. The method of claim 9,
And a variable coating layer formed on one surface of the transmission part and formed of a material having a characteristic variable according to at least one of humidity and temperature.

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