KR102373844B1 - Antibacterial graphic film attachable indoors and outdoors - Google Patents

Abstract

The present invention relates to an antibacterial graphic film which is attachable to an indoor and an outdoor, and more specifically, to an antibacterial graphic film which is attachable to an indoor and an outdoor which comprises an antibacterial coating layer formed on a porous base film such as a nonwoven fabric to be attached to an indoor floor surface, an outdoor floor surfaces, a wall surface, and the like and have excellent antibacterial performance when used for information, advertisement, exhibition, decoration, and the like.

Description

Antibacterial graphic film attachable indoors and outdoors}

The present invention relates to an antibacterial graphic film that can be attached indoors and outdoors. By including an antibacterial coating layer formed on a porous base film such as a nonwoven fabric, it is attached to indoor and outdoor floor surfaces, walls, etc. It relates to an antibacterial graphic film attachable indoors and outdoors, which can have excellent antibacterial performance when used for the purpose.

The graphic film is attached to indoor or outdoor floors and walls for various purposes such as road traffic indication information, display of prohibited areas, school zones, etc., advertising or decoration of products or services, etc., and the visibility, abrasion resistance, and adhesion of the graphic film In order to improve the properties and peel resistance, various laminate structures and combinations of components are being made.

On the other hand, the recent emergence of various viruses such as corona virus and new influenza, and the risk of infection caused by bacteria such as food poisoning bacteria and various infectious diseases threaten human safety and life, and measures to overcome them are urgently required. In addition, mold grows in a closed room or basement of a humid building, and in the case of high temperature and high humidity during the monsoon season, it can contaminate indoor wallpaper, etc. Products with added functions to improve the environment are also in demand.

Many of these antibacterial/antiviral products are designed to prevent viruses and bacteria from growing in public transportation facilities such as trains, subways, and buses and multi-use facilities such as station/airport ticket machines and elevators that come into contact with human hands. Products in the form of functional protective films are being developed, and these antibacterial films are made of materials with high sterilization and antibacterial properties, helping to prevent infectious diseases.

From this point of view, the demand for products with or adding antibacterial/antiviral functions to prevent the aforementioned corona virus, new influenza, and various infectious diseases is increasing, and the graphic film product is similarly antibacterial/antiviral. gender is required.

As a prior art related to such an antibacterial graphic film, Japanese Unexamined Patent Publication No. 1997-194776 (published on July 29, 1997) discloses a sheet-like printed matter coated with ink, cloth (fabric), a sheet composed of a resin member, and a metal member. In order to prevent mold from adhering to a sheet composed of a ceramic member or propagation of bacteria, the ink is applied to a sheet-like member such as a fabric using an inkjet ink containing either a photocatalyst or an antibacterial agent A technology including A technology for producing an antibacterial graphic film using an ink composition containing 0.01 to 5.0 wt% of particles fixed with water or an organic solvent is proposed, and in Patent Publication No. 10-2238550 (published on April 13, 2021), it is used as a graphic film. An antibacterial layer consisting of a composition including an acrylate-based UV resin, a silver nano antibacterial agent, and a silicone-based leveling agent for improving surface smoothness; a base layer positioned on a lower surface of the antibacterial layer; and an adhesive layer located on a lower surface of the base layer; and a release film located on the lower surface of the adhesive layer; is presented with respect to an antibacterial film comprising.

However, in spite of the prior art including the prior art, by exhibiting more improved antibacterial properties and at the same time having good adhesion and visibility There is a continuous demand for the development of products with optimized antibacterial performance according to the laminate structure of graphic films that can perform the function as graphic films. As a result, only the printed area in the graphic film has a limit to exhibit antibacterial properties. A specific area in the antibacterial graphic film focuses on antibacterial performance, and another specific area is a graphic film for information, advertisement, display, decoration, etc. There is nothing known about a hybrid type antibacterial graphic film that maximizes each effect by focusing on the purpose of

Japanese Patent Laid-Open No. 1997-194776 (published on July 29, 1997) Japanese Laid-Open Patent Publication No. 1995-331151 (published on December 19, 1995) Registered Patent Publication No. 10-2238550 (Announcement date 2021.0413.)

The present invention is an antibacterial graphic that can have excellent antibacterial performance when it is attached to indoor and outdoor floor surfaces, walls, etc. for various purposes such as guidance, advertisement, display, decoration, etc. It is an object of the invention to provide a film.

In addition, the present invention is a hybrid that maximizes each effect by focusing on the purpose of the graphic film such as guide, advertisement, display, decoration, etc. It is another object of the invention to provide an antibacterial graphic film of the type.

In addition, it is another object of the present invention to provide an antibacterial pad comprising the antibacterial graphic film according to the present invention on at least a part of the outer surface.

The present invention is a porous base film (3) containing irregularities on the surface; an antibacterial coating layer (4) formed on the porous base film (3); and a print ink layer (5) formed on the antibacterial coating layer; as an antibacterial graphic film, wherein the antibacterial coating layer is 0.1 to 2% by weight of copper oxide, based on the total content of the antibacterial coating layer excluding the solvent, and 1 to zinc oxide It provides an antibacterial graphic film comprising 8% by weight, 3 to 30% by weight of zeolite, and 60 to 95% by weight of a binder.

In addition, the present invention is a porous base film (3) containing irregularities on the surface; and an antibacterial coating layer (4) formed on the porous base film (3), wherein the surface area of the uppermost layer is an antibacterial graphic film including a first area and a second area, wherein the antibacterial coating layer is antibacterial Based on the total content of the coating layer, it contains 0.1 to 2% by weight of copper oxide, 1 to 8% by weight of zinc oxide, 3 to 30% by weight of zeolite, and 60 to 95% by weight of a binder, and in the first region, An antibacterial graphic film is provided, characterized in that the printing ink layer 5 is formed on the upper portion, and the antibacterial coating layer 4 is exposed to the outside air in the second area, thereby performing antibacterial and antiviral functions more effectively than the first area do.

As an embodiment of the present invention, the antibacterial graphic film is a release paper adhesive layer (2) for adhesion with the release paper on the lower side of the porous base film (3); and a release paper 1 that is attached to the release paper adhesive layer and is detachable.

As an embodiment of the present invention, the thickness of the antibacterial coating layer in the antibacterial graphic film is in the range of 5 μm to 30 μm, and the antibacterial coating layer surrounds the surface by the uneven structure of the base film to form an uneven structure in the same direction It can be characterized as

In one embodiment of the present invention, the antibacterial coating layer is a dispersant and silver nanoparticles At least one or more components selected from among may be additionally included.

As an embodiment of the present invention, the antimicrobial coating layer is based on the total content of the antimicrobial coating layer, copper oxide 0.1 to 0.8% by weight, zinc oxide 1.5 to 6% by weight, zeolite 5 to 20% by weight, binder 75 to 93 % by weight.

In one embodiment of the present invention, the porous base film is any one selected from polypropylene, polyester, nylon, rayon, vinylon, polyethylene, polyacrylonitrile, polyurethane, glass fiber, cotton, pulp and hemp, or these It may be a nonwoven fabric comprising a mixed component of

In one embodiment of the present invention, the binder Any one selected from a thermosetting resin, a thermoplastic resin, a UV curable resin, a heat and UV co-curable resin, and a moisture curable resin, or a mixture thereof may be used.

The present invention also provides an antimicrobial article comprising the antimicrobial graphic film according to the present invention on at least a portion of the outer surface.

The antibacterial graphic film according to the present invention can exhibit greatly improved antibacterial and antiviral effects according to the combination of copper oxide, zinc oxide and zeolite in the antibacterial coating layer.

In addition, the antibacterial graphic film according to the present invention has a very high surface area showing antibacterial properties because the antibacterial coating layer having antibacterial performance is formed along the porous structure due to the unevenness of the base film according to the porous structure of the base film. By showing, it is possible to exhibit an improved effect compared to the antibacterial graphic film according to the prior art.

In addition, in the antibacterial graphic film according to another embodiment of the present invention, in addition to the effect of retaining antibacterial performance in the porous structure due to the unevenness of the base film, the antibacterial coating layer of the second region that does not include a print ink layer is directly to the outside air. By being exposed, the antibacterial and antiviral function can be performed very effectively than the first area, so it has the advantage of showing the effect of maximizing the antibacterial and antiviral performance.

1 is a diagram showing an antibacterial graphic film according to the present invention.
2 is a diagram showing a part of the cross-section of the antibacterial graphic film according to the present invention.
3 is another embodiment of the antibacterial graphic film according to the present invention, and is a diagram showing the antibacterial graphic film separated into a first area and a second area.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is those well known and commonly used in the art.

When a part "includes" a component throughout this specification, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

The antibacterial graphic film according to the present invention includes a porous base film 3 containing irregularities on the surface; an antibacterial coating layer (4) formed on the porous base film (3); and a print ink layer 5 formed on the antibacterial coating layer, wherein the antibacterial coating layer contains 0.1 to 2 wt% of copper oxide, 1 to 8 wt% of zinc oxide, and zeolite based on the total content of the antibacterial coating layer. 3 to 30% by weight, and 60 to 95% by weight of the binder, wherein the antibacterial graphic film is a surface of a wall or glass surface in a building, a touch panel such as a TFT-LCD exposed in a government office, the outer surface of a shopping cart, It can be applied to the surface of a mouse pad, etc., and can play a role of safely maintaining the surface part from various bacteria.

Hereinafter, the antibacterial graphic film according to the present invention will be described in more detail with reference to FIGS. 1 to 3 .

First, FIG. 1 is a diagram showing an antibacterial graphic film according to the present invention. The porous base film 3 in FIG. 1 is a polymer material manufactured in the form of a film, and its surface is 10 to 200 μm thick, preferably 15 to 100 μm thick, more preferably 20 to 70 μm thick, including concavities and convexities, and if it corresponds to a polymer material containing an empty space in the concave portion thereof, it can be used without being limited in type, , Preferably polypropylene, polyester, nylon, rayon, vinylon, polyethylene, polyacrylonitrile, polyurethane, glass fiber, cotton, pulp, and any one selected from hemp or a nonwoven fabric comprising a mixture thereof will be used can

The non-woven fabric is a fabric made by adhering or tangling fibers by mechanical manipulation, thermal bonding, or chemical agents, and spinning the fibers. It refers to a sheet-shaped product made into a cloth shape by applying heat and pressure by arranging in parallel or negative directions without weaving or braiding, and it can be preferably applied to the antibacterial graphic film of the present invention because it contains irregularities on the surface.

That is, the base film 3 of the present invention is the lowest layer that serves as the base material of the antibacterial graphic film, and as it has porosity, it is possible to implement the texture of the embossed pattern while being light, and thus the antibacterial component of the antibacterial coating layer according to the high surface area. Antibacterial performance can be improved by applying it to a large surface.

The thickness of the base film 3 may range from 40 μm to 300 μm, preferably from 50 μm to 250 μm, more preferably from 60 μm to 200 μm, where the thickness of the base film 3 is If is less than 40 μm, the size of the concave-convex structure is small and the surface area is reduced, and it is not possible to represent a thickness sufficient to support the antibacterial coating layer 4 on the base film 3, and the thickness is 300 μm. If it exceeds, the porous portion of the concave-convex structure may be too large, and there is a problem that the antibacterial coating layer 4 may be difficult to be coated on the entire surface.

On the other hand, the antibacterial coating layer (4) in the present invention, on the basis of the porous base film (3) containing irregularities on the surface is coated thereon to implement the antibacterial performance, to implement the antibacterial effect of the antibacterial coating layer Components for the composition correspond to copper oxide, zinc oxide, and zeolite, and binding each of these inorganic components to the base film corresponds to a binder.

Here, the respective antibacterial components of copper oxide, zinc oxide and zeolite can produce a synergistic effect through physical and chemical action with each other, and therefore, the present invention does not depend on only one specific antibacterial component, but rather a combination according to the composition It can be said that there is a characteristic in the content of each and the combined component. In particular, the present invention has the advantage of being able to provide an antibacterial graphic film using eco-friendly and harmless antibacterial ingredients by excluding components that are excellent in sterilization and antibacterial effects, but which are highly likely to act as harmful factors when in contact with the human body.

Here, copper oxide, zinc oxide, and zeolite, which are the antibacterial components, are each mixed in the form of a powder, and in this case, each powder may be used having an average particle diameter of 10 to 350 nm, preferably 20 to 150 nm, usually A zeolite having an average particle diameter of 3 to 200 times the average particle diameter of copper oxide and zinc oxide can be used, and the antibacterial coating layer 4 is based on the total content of the antibacterial coating layer as 100, copper oxide 0.1 to 2% by weight, oxide 1 to 8% by weight of zinc, 3 to 30% by weight of zeolite, and 60 to 95% by weight of a binder.

Here, as the copper oxide as an antibacterial component according to the present invention, any one selected from copper oxide I (Cu2O), copper II oxide (CuO), and copper oxide III (Cu2O3) or a mixture thereof may be used, and preferably, the Copper oxide is more preferably Cu ⁺ copper oxide I (Cu 2 O) than Cu ²⁺ . When the copper oxide is Cu ⁺ , copper ion elution is easier than Cu ²⁺ , improving the frequency of contact with microorganisms or viruses. This makes it easier to inhibit or decompose the metabolic function of microorganisms and viruses.

In general, copper has an antibacterial action and is hardly toxic to the human body. Copper oxide according to the present invention destroys the cell membrane of bacteria when in contact with bacteria and at the same time decomposes DNA/RNA of viruses to have antibacterial and antiviral properties As a representative metal oxide containing acid, the copper (I) oxide is also called cuprous oxide, and the red rust of copper corresponds to this, the color changes according to the size of the particles, and is oxidized by being gradually oxidized by air or light It turns into copper (II). In addition, copper (II) oxide is called cupric oxide, and has a black color and is produced when copper is heated strongly in air. It is also used as a pigment, paint, oxidizer, catalyst, etc., and copper III oxide (Cu2O3) has a red color. It is an inorganic compound that is being studied in superconductors, etc.

At this time, the copper oxide powder included in the antimicrobial coating layer according to the present invention is based on 100 wt% of the total content of the antimicrobial coating layer excluding the solvent, 0.1 to 2 wt%, preferably 0.1 to 0.8 wt%, more preferably 0.2 to 0.7% by weight may be used.

Zinc oxide as an antibacterial component according to the present invention is excellent in antifungal properties and deodorization properties, and by inhibiting the metabolism of viruses or bacteria, it gives antibacterial and sterilizing power through a mechanism to kill and remove it. In particular, nano-sized zinc oxide has a surface effect that bulk materials do not have due to an increase in specific surface area, and when the matrix coated with the antibacterial composition comes into contact with moisture in the air, the zinc oxide of zinc oxide present on the surface of the matrix As the metal component is ionized and eluted, it acts as an antibacterial agent against harmful bacteria such as bacteria.

In this case, the zinc oxide powder included in the antimicrobial coating layer according to the present invention may be used in an amount of 1 to 8 wt%, preferably 1.5 to 6 wt%, based on 100 wt% of the total content of the antimicrobial coating layer excluding the solvent.

At this time, if the content of the zinc oxide powder contained in the antimicrobial composition is less than 1% by weight, it is impossible to provide antibacterial activity to the surface to be coated (adhered surface) of the antibacterial component. In addition, when the content of the zinc oxide powder exceeds 8% by weight, the improvement of the effect on antibacterial activity is insignificant, but the content of the inorganic component is increased, so that the binding force by the binder may be lowered and the manufacturing cost may be increased.

The zeolite in the antibacterial coating layer according to the present invention exhibits antibacterial properties by itself, but in addition to this, it can serve as a carrier for supporting the metal oxide. can be maximized.

That is, the copper oxide and zinc oxide according to the present invention are metal oxides exhibiting antibacterial properties by releasing copper ions and zinc ions, and may be supported on a porous inorganic material and controlled so that copper ions and zinc ions are stably and continuously released. At this time, the present invention uses zeolite as the porous inorganic material and uses it as a carrier for supporting copper oxide and zinc oxide to support these antibacterial components and to allow them to slowly elute, and the zeolite also contains the antimicrobial components ( It has the advantage of having stability that is not deteriorated even in the very strong oxidizing property of metal oxide).

Here, the zeolite may be included in the range of 3 to 30% by weight, preferably 5 to 20% by weight, more preferably 6 to 12% by weight based on the total content of the antimicrobial coating layer 4 excluding the solvent. there is.

When the amount of the zeolite is less than 3% by weight, the copper oxide and zinc oxide cannot be sufficiently supported, so that the antimicrobial metal ions cannot be continuously and stably released. It may have a disadvantage in that the binding force for fixing on the base film by the binder is lowered.

The binder in the antibacterial coating layer according to the present invention binds inorganic components (metal oxide and zeolite) exhibiting antibacterial properties to each other and also serves to fix on the surface of the base film, and metal oxides (copper oxide and zinc oxide) having antibacterial properties ) is mixed with the supported zeolite and combined with each of the inorganic antibacterial components, and also adhered and cured to the base film 3, so that the antibacterial coating layer 4 can be combined with high adhesion.

At this time, the content of the binder is 60 to 95% by weight, preferably 75 to 93% by weight, based on the total content of the antimicrobial coating layer 4 excluding the solvent 100 is included. When the binder is included in an amount of less than 60% by weight, the antimicrobial coating layer 4 coating film cannot be stably formed on the base film 3 or the adhesive force to the adherend is low, so the active ingredient of the antibacterial composition of the antibacterial coating layer 4 adheres. It may not be able to maintain the state attached to the cotton for a certain period of time (at least 6 months), and its content is high. When it exceeds 95% by weight, the content of the binder is excessively included to lower the antibacterial component, and thus the antibacterial property of the antimicrobial coating layer as a whole may be lowered.

The binder is not particularly limited if it is a material that can be mixed with the metal oxide and zeolite to form a film stably, for example, a thermosetting resin, a thermoplastic resin, a UV curable resin, a heat and UV co-curable resin, a moisture curable resin Alternatively, a resin obtained by mixing two or more thereof may be used, and as an example, an alkyd-based resin, an acrylic resin, a melamine-based resin, a urethane-based resin, an epoxy-based resin, a silicone-based resin, a polyester-based resin, a polyamic acid-based resin, a polyimide-based resin Resin, styrene maleic acid-based resin, styrene maleic anhydride-based resin, acrylic acid-based monomer, acrylate-based monomer, polypropylene, polyethylene, polysulfone, polystyrene, polyvinyl chloride, polyethylene terephthalate, polyester, nylon and silicone resin It is preferable to use any one of them.

Specifically, it is preferable to use an epoxy resin, a urethane resin, an acrylic resin, a fluororesin, etc. as the thermosetting resin, but is not limited thereto.

The antimicrobial coating layer in the antimicrobial graphic film according to the present invention is preferably 0.1 to 0.8 wt% of copper oxide, 1.5 to 6 wt% of zinc oxide, 5 to 20 wt% of zeolite based on the total content of the antimicrobial coating layer excluding the solvent % by weight, and may contain 75 to 93% by weight of a binder.

In addition, the thickness of the antibacterial coating layer 4 in the antibacterial graphic film is in the range of 5 μm to 30 μm, preferably in the range of 7 μm to 15 μm, while the antibacterial coating layer surrounds the surface of the concave-convex structure of the base film. Concave-convex structures in the same direction can be formed.

If this is described in more detail with reference to FIG. 2, FIG. 2 is a diagram showing a part of the cross-section of the antibacterial graphic film according to the present invention.

2, the thickness of the base film 3 may range from 40 μm to 300 μm, preferably from 50 μm to 250 μm, more preferably from 60 μm to 200 μm, and its 10 to 200 μm thick, preferably 15 to 100 μm thick, more preferably 20 to 70 μm thick unevenness on the surface may be included, and FIG. 2 shows a structure in which a concave portion is formed on the base film 3 .

In addition, in FIG. 2, the antibacterial coating layer 4 covers the surface of the base film of the concave-convex structure to form an embossed structure by forming the concave-convex structure in the same direction while enclosing the surface as a whole, and accordingly, the antibacterial coating layer ( 4) By having this large surface area, antibacterial property can be improved more.

At this time, the thickness of the antimicrobial coating layer 4 in the present invention is in the range of 5 μm to 30 μm, preferably in the range of 7 μm to 15 μm.

When the thickness of the antibacterial coating layer 4 is less than 5 μm, it may be difficult to form an antibacterial coating layer on the surface in the direction perpendicular to the surface of the uneven structure in the base film 3, so that it cannot exhibit sufficient antibacterial properties as a whole, and the antibacterial The print ink layer 6 laminated on the coating layer cannot be sufficiently supported, and when it exceeds 30 μm, it is difficult to maintain the concave-convex structure formed on the base film 3 due to the thick thickness of the antibacterial coating layer 4 . , it may be undesirable to improve antibacterial properties, and economic efficiency may be reduced due to the use of excessive antibacterial materials.

In addition, when the thickness of the antibacterial coating layer 4 is thickened, a unique color may be exhibited, so that the color of the image printed on the print ink layer 5 laminated on the antibacterial coating layer may be distorted.

In addition, the antibacterial coating layer (4) according to the present invention is a dispersant and silver nanoparticles At least one component selected from among may be additionally included, and the content thereof may range from 0 to 100% by weight, preferably from 0 to 50% by weight, based on the total amount of each component of the antimicrobial coating layer.

Here, the dispersing agent is to uniformly disperse the binder contained in the antibacterial coating layer, copper oxide and zinc oxide powder, and water, an organic solvent, or a mixture of water and organic solvent may be used, and the dispersant according to the present invention is a binder and 10 to 900 parts by weight based on 100 parts by weight of the mixture of the remaining antimicrobial components. At this time, if the content of the dispersant is less than 10 parts by weight based on 100 parts by weight of the mixture of the binder and the antimicrobial component, it is difficult to uniformly disperse the binder and the inorganic antimicrobial component when the antimicrobial composition is applied to the coating object or film or when the film is manufactured. can be In particular, if the content of the dispersant is less than 30 parts by weight based on 100 parts by weight of the mixture of the binder and the inorganic antibacterial component, the viscosity of the antimicrobial composition may increase and thus it may be difficult to use as a spray.

Specifically, as the dispersant, water, alcohol, ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), ethers (methyl cellusolve, ethyl cellusolve, butyl cellusolve, etc.), esters (ethyl acetate, butyl acetate, etc.), dimethylformamide, n-methylpyrrolidine, propylene glycol monomethyl ether acetate, dibasic ester, dimethyl carbonate, toluene, etc. may be used, and two or more thereof may be mixed and used. . If necessary, methyl ethyl ketone (MEK) may be partially added as the dispersing agent.

In addition, the silver nanoparticles can have a strong sterilization effect while displaying silver ions (Ag+) in an aqueous solution, and can be synthesized through silver nitrate, synthesized using ultraviolet (UV), biosynthesis using bacteria or fungi, etc. Among them, synthesis through silver nitrate may be generally used.

The average diameter of the particles in the silver nanoparticles may be 1 nm to 1000 nm powder, preferably 10 nm to 200 nm, but is not limited thereto.

In addition, the antimicrobial coating layer 4 in the present invention may additionally include an antifoaming agent. The antifoaming agent is added when an antibacterial component is sprayed with a spray composition, and when the antibacterial composition is applied to an object (parent) by a spray method, it provides a function of removing bubbles generated on the surface of the applied object. .

In particular, the antifoaming agent serves to increase the commercial properties of the antibacterial composition by preventing the application surface from being deformed to be curved due to the generation of bubbles.

On the other hand, the antibacterial graphic film according to the present invention is a release paper adhesive layer (2) for adhesion with a release paper on the lower side of the porous base film (3); and a release paper 1 that is attached to the release paper adhesive layer and is detachable.

That is, the base film 3 may further include an adhesive layer 2 on the lower side of the base film 3 so as to be attached to a wall, a floor, or an external surface of an article inside and outside a building, and the adhesive layer (2) is coated with a detachable release paper (1) to prevent shrinkage or contamination before adhesion.

Here, the release paper adhesive layer 2 and the release paper 1 are not particularly limited in the case of a material applicable to the base film 3 and can be used without being limited to a specific material, but the release paper adhesive layer 2 is an element Polyester, melamine, phenol, unsaturated polyester, epoxy, resorcinol, vinyl acetate, polyvinyl alcohol, vinyl chloride, saturated polyester, polyvinyl acetal, acrylic, polyamide, polyethylene It may be any one or more selected from the group consisting of, butadiene rubber, nitrile rubber, butyl rubber, silicone rubber, chloroprene rubber, vinyl, phenol-chloroprene, epoxidized nitrile rubber, starch, glue, latex, resin and shellac. And, the release paper 1 may contain a silicone-based release agent containing an organosiloxane-based polymer in order to improve the release property with the pressure-sensitive adhesive layer.

In this case, the detachable release paper 1 having the adhesive layer 2 may be coated on the base film 3 by a conventional method such as roll coating, bar coating, or gravure coating.

In addition, the antibacterial graphic film of the present invention may form a print ink layer 5 on the antibacterial coating layer 4 .

The print ink layer 5 is the uppermost layer of the antibacterial graphic film, and various graphics are printed by a commonly known method using dyes or pigments depending on the purpose, such as a cover, advertisement, decorative painting, etc., according to color or black and white printing. It corresponds to a coating layer that implements the function of advertisement or display.

Specifically, ink is basically composed of colorants (dyes, pigments), vehicles (binders, waxes, solvents, etc.), and auxiliary agents (fluidity regulators, dryness regulators, etc.) It may vary considerably, and it may be appropriately adjusted according to the user's preference or work environment.

For example, an image may be printed by an inkjet method using a digital printer using inks such as water-based dye ink, water-based pigment ink, strong solvent pigment ink, weak solvent pigment ink, mild ink, eco ink, and oil ink.

As the ink, white ink may be used together with the four-color ink of cyan-magenta-yellow-black (CMYK). That is, since white ink is used in combination with cyan, magenta, yellow, and black inks, white can be expressed, and additional colors that cannot be realized with cyan, magenta, yellow, and black inks alone can be expressed.

In addition, since the image is printed with a digital printer, the image desired by the consumer can be printed delicately and clearly.

In addition, inkjet digital printing does not have environmental problems due to organic solvents used in gravure printing, silk screen printing, etc.

Accordingly, the graphic film having the antibacterial function of the present invention may include an image printed by an inkjet method using white ink together with four color inks of cyan-magenta-yellow black (CMYK).

In addition, the print ink layer 5 may further include additives such as photocurable materials such as acrylic and epoxy, inorganic particles such as silica particles or alumina particles that can exhibit matting properties, UV stabilizers, dispersants, and abrasion resistance components. .

In addition, the print ink layer 5 is a coating solution obtained by dissolving or dispersing the resin and, if necessary, additives such as inorganic particles, UV stabilizers, dispersants, defoamers, wetting agents, and leveling agents in water, an organic solvent, or a mixed solvent thereof. It may be formed on the antibacterial coating layer 4 using a coating method such as a gravure coater, a slot die coater, or a bar coater, and after coating, it may be dried in an oven to finally form the print ink layer 5 .

In addition, the present invention divides the region including the print ink layer 5 and the region not including it, so that a specific region in the antibacterial graphic film focuses on antibacterial performance, and another specific region is used for guidance and advertisement. It is possible to provide a hybrid type antibacterial graphic film that maximizes each effect by focusing on the purpose of the graphic film, such as , exhibition, and decoration.

More specifically, the present invention provides a porous base film (3) containing irregularities on the surface; and an antibacterial coating layer (4) formed on the porous base film (3), wherein the surface area of the uppermost layer is an antibacterial graphic film including a first area and a second area, wherein the antibacterial coating layer is antibacterial Based on the total content of the coating layer, it contains 0.1 to 2% by weight of copper oxide, 1 to 8% by weight of zinc oxide, 3 to 30% by weight of zeolite, and 60 to 95% by weight of a binder, and in the first region, An antibacterial graphic film is provided, characterized in that the printing ink layer 5 is formed on the upper portion, and the antibacterial coating layer 4 is exposed to the outside air in the second area, thereby performing antibacterial and antiviral functions more effectively than the first area can do.

Here, the porous base film (3); And the components and content of the antibacterial coating layer 4 and their functions are the same as described above, and some areas of the antibacterial coating layer 4 formed on the base film 3 are made of only the antibacterial coating layer, so that more improved antibacterial properties can be exhibited, In another area, the printing ink layer 5 is formed on the antibacterial coating layer, so that the graphic function may be effective.

If this is explained in detail with reference to FIG. 3, in the upper figure of FIG. 3, the first area functions as an advertisement or display by the printing ink layer, and in the second area, the antibacterial function can be simply maximized without an advertisement or display function. there is. This can be used, for example, when the second area has a higher probability of contamination or bacterial propagation than the first area or when quarantine is required, or the second area has an original antibacterial function, but the function of the second area in the first area It is possible to provide an antibacterial graphic film designed to have a display function that can inform.

In addition, the lower figure of FIG. 3 is an antibacterial graphic film in which the second area is partially present in the first area, which is responsible for displaying or advertising functions in the first area, and concentrates some area inside the It is possible to further improve the antibacterial performance of the antibacterial graphic film.

In addition, it is possible to form a print ink layer on only a portion of the antibacterial graphic film to display pictures, drawings, or text, and to strengthen the antibacterial function by placing most of the remaining areas as the second area.

The present invention also provides an antimicrobial article comprising the antimicrobial graphic film on at least a portion of an outer surface.

That is, by using the antibacterial article obtained by attaching the antibacterial graphic film obtained according to the present invention to the surface of a transparent film, a color film, a sheet made of a polymer resin, an external surface for electronic devices, a mouse pad, a stationery, etc. It can be changed to a product with significantly improved antibacterial performance than before the antibacterial graphic film was attached.

Hereinafter, the present invention will be described in more detail by way of Examples, but the present invention is not limited by the Examples.

<Example>

Antibacterial graphic film manufacturing

<Example 1>

An antibacterial coating layer is applied on a thermoplastic polyester nonwoven fabric (thickness 100 um) containing porous irregularities on the surface. formed. At this time, as shown in Table 1 below, the antibacterial coating layer is water 70 as a solvent ml, 80 g of a water-based acrylic emulsion binder, 0.6 g of copper oxide, 3.5 g of zinc oxide, and 8 g of zeolite were mixed, stirred at 30 rpm for 2 hours, and defoamed. The resulting paste was applied on the porous nonwoven fabric. Then, the antibacterial coating layer was prepared with a final average thickness of 11 μm by hot air drying at 50 to 80°C.

Thereafter, an ink-based binder was applied on the antibacterial coating layer, and a print ink layer was formed by printing using an inkjet or the like.

The antibacterial properties of the antibacterial graphic film prepared by the above manufacturing method were evaluated below.

<Example 2>

An antibacterial film according to Example 1 was prepared, but an antibacterial graphic film was prepared using the content of the components of the antibacterial coating layer according to Table 1 below.

<Example 3>

An antibacterial film according to Example 1 was prepared, but after the formation of the antibacterial coating layer, half of the area compared to the area on which the antibacterial coating layer was formed was left as it is, and only the other half was coated with an ink-based binder and printed using inkjet printing. An ink layer was formed.

<Comparative Example 1>

A graphic film was prepared in the same manner as in Example 1, but the thickness of the antibacterial coating layer was coated to 60 um.

<Comparative Example 2>

A graphic film was prepared in the same manner as in Example 1, and the total amount of antibacterial components of the antibacterial coating layer was maintained the same, but zeolite and zinc oxide were not included.

antibacterial coating layer copper oxide
(weight%) zinc oxide
(weight%) zeolite
(weight%) bookbinder
(weight%) Example 1 0.6 3.5 8 80 Example 2 0.3 5 10 80 Example 3 0.6 3.5 8 80 Comparative Example 1 0.6 3.5 8 80 Comparative Example 2 0.6 - - 80

Antibacterial evaluation of antibacterial graphic film

Antimicrobial properties were evaluated for each of the prepared antibacterial graphic films (Examples 1 to 3, Comparative Examples 1 to 2), and are shown in Tables 2 and 3 below.

At this time, the microorganisms to be tested for antibacterial activity are E. coli and Staphylococcus aureus (S. aureus). was left for 24 hours in a space containing the E. coli and Staphylococcus aureus, and then the antibacterial properties were measured.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Inoculation E. coli concentration (CFU/cm2) 1.4*10^4 B ₀ (CFU/cm2) ^* 1.4*10^4 B ₂₄ (CFU/cm2) ^** 1.2*10^6 A ₂₄ (CFU/cm2) ^*** < 1 <1 < 1 1.2*10^2 2.8*10^3

- Standard film and evaluation conditions: Stomacher 400 poly bag, R.H. Evaluation after 24 hours under 90% conditions

* B ₀ : E. coli concentration immediately after inoculation (after 0 hours) of microbial medium (standard sample) without antibacterial graphic film

** B ₂₄ : E. coli concentration after 24 hours of incubation of microbial medium (standard sample) without antibacterial graphic film

*** A ₂₄ (antibacterial processed sample): E. coli concentration after 24 hours of incubation of microbial medium (antibacterial processed sample) containing antibacterial graphic film

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Inoculation Staphylococcus aureus concentration (CFU/cm2) 1.4*10^4 B ₀ (CFU/cm2) ^* 1.4*10^4 B ₂₄ (CFU/cm2) ^** 2.6*10^4 A ₂₄ (CFU/cm2) ^*** <1 <1 <1 8.3*10^1 2.1*10^2

- Standard film and evaluation conditions: Stomacher 400 poly bag, R.H. Evaluation after 24 hours under 90% conditions

* B ₀ : Staphylococcus aureus concentration immediately after inoculation (after 0 hours) of microbial medium (standard sample) without antibacterial graphic film

** B ₂₄ : Staphylococcus aureus concentration after 24 hours of incubation of microbial medium (standard sample) without antibacterial graphic film

*** A ₂₄ (antibacterial processed sample): Staphylococcus aureus concentration after 24 hours of incubation of a microbial medium (antibacterial processed sample) containing an antibacterial graphic film

According to Table 2 and Table 3, the antibacterial graphic film prepared by Examples 1 to 3 according to the present invention showed superior antibacterial effect compared to the results according to Comparative Examples 1 and 2, and as a result, the present invention The antibacterial graphic film manufactured according to this method can show more than 99% of antibacterial properties, so it is judged to have high application potential.

1: Lee Hyungji
2: Glue
3: Porous base film
4: antibacterial coating layer
5: Print ink layer

Claims (9)

a porous base film 3 having irregularities on its surface;
an antibacterial coating layer (4) formed on the porous base film (3); and
As an antibacterial graphic film comprising; a print ink layer (5) formed on the antibacterial coating layer,
The antibacterial coating layer is based on the total content of the antibacterial coating layer, copper oxide 0.1 - 0.8% by weight, zinc oxide 1.5 - 6% by weight, zeolite 5 - 20% by weight, antibacterial characterized in that it comprises a binder 75 - 93% by weight graphic film.
a porous base film 3 having irregularities on its surface; and
and an antibacterial coating layer (4) formed on the porous base film (3);
An antibacterial graphic film comprising a first area and a second area in which the surface area of the uppermost layer is separated from each other,
The antimicrobial coating layer contains 0.1 - 0.8 wt% of copper oxide, 1.5 - 6 wt% of zinc oxide, 5 - 20 wt% of zeolite, and 75 - 93 wt% of a binder, based on the total content of the antimicrobial coating layer,
In the first region, a print ink layer 5 is formed on the antibacterial coating layer,
In the second area, the antibacterial graphic film, characterized in that the antibacterial coating layer (4) is exposed to the outside air to perform antibacterial and antiviral functions more effectively than in the first area.
3. The method of claim 1 or 2,
The antibacterial graphic film is a release paper adhesive layer (2) for adhesion with the release paper on the lower side of the porous base film (3); and a release paper (1) that is attached to the release paper adhesive layer and is detachable.
3. The method of claim 1 or 2,
The thickness of the antibacterial coating layer in the antibacterial graphic film is in the range of 5 μm to 30 μm, and the antibacterial graphic film, characterized in that the antibacterial coating layer surrounds the surface of the base film by the uneven structure to form the uneven structure in the same direction .
3. The method of claim 1 or 2,
The antibacterial coating layer is a dispersant and silver nanoparticles Antibacterial graphic film, characterized in that it additionally comprises at least one component selected from among.
delete 3. The method of claim 1 or 2,
The porous base film is a nonwoven fabric comprising any one selected from polypropylene, polyester, nylon, rayon, vinylon, polyethylene, polyacrylonitrile, polyurethane, glass fiber, cotton, pulp and hemp or a mixture thereof. Characterized in that, antibacterial graphic film.
3. The method of claim 1 or 2,
The binder is an antibacterial graphic film, characterized in that any one selected from a thermosetting resin, a thermoplastic resin, a UV curable resin, a heat and UV co-curable resin, and a moisture curable resin or a mixture thereof is used.
An antibacterial article comprising the antimicrobial graphic film of claim 1 or 2 on at least a portion of the outer surface.

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