KR101183654B1 - Security film for display device and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a security film for a display device, the first film layer; And a transmissive layer that is printed with transparent ink in an area other than a shielding partition formation space that is repeatedly arranged in parallel or lattice form at a distance from each other on at least one surface of the first film layer, and transmits an image to the shielding partition formation space. And a blind layer having a shielding partition filled with a light absorbing colored ink.

Description

Security film for display device and manufacturing method thereof {Security film for display device and manufacturing method}

The present invention relates to a security film for a display device, and more particularly, to a security film for a display device for forming a shielding partition by a printing method and a manufacturing method thereof.

The security film for the display device may be an image easily displayed to a user, but the film may not be able to see the image displayed on the screen from an angle of people located around the screen.

14 is a view illustrating the principle of a general security film, the security film is formed by forming a plurality of shielding partitions on the base film, the line width of the shielding partition ω, the height h, the interval l, the viewing angle θ The formula to be obtained is shown in Equation 1, and the image is blocked by the shielding partition in a state where the viewing angle is smaller than θ.

That is, when the viewing angle of the user is lower than the predetermined angle, the image is blocked by the shielding partition to realize the characteristics of the security film. For example, when the width of the barrier rib is 10 μm, the distance between the barrier ribs is 50 μm, and the height is 180 μm, the shielding barrier may have a viewing angle of 16 ° in theory. However, the viewing angle may be wider if the shield barrier does not shield 100% light.

As a method of implementing such a shielding barrier on a security film, a conventional mold pressing method using a mold is mainly used, and a method of forming an uneven grid on such a film has a huge cost to the mold and its associated manufacturing equipment, resulting in an increase in product prices. There was a problem.

In addition, by forming a concavo-convex lattice with a certain heat and pressure using a mold on a thin film having a weak physical property, the quality is reduced due to the sharpness and cracks caused by film damage such as cracking and warping, and the transmission image is blocked. There was a problem that was very difficult to secure the side security features that are invisible from the side.

In addition, as a method of forming a shielding partition, a method of applying an opaque adhesive pigment to a transparent film and forming a cut after alternating adhesion and lamination processes has been proposed, thereby reducing productivity of the security film and product price. There was a problem that causes the rise, particularly in the cutting process it was very difficult to ensure the uniformity and sharpness of the product.

Accordingly, an object of the present invention is to provide a security film for a display device and a method of manufacturing the same, which fills a shielding partition between the permeable membranes after printing the permeable membranes with transparent pigments.

Security film for a display device according to an aspect of the present invention,

A first film layer;

A transmissive layer which is printed with transparent ink in an area other than the shielding partition wall forming space which is repeatedly arranged in parallel or lattice form at a distance from each other on at least one surface of the first film layer, and transmits an image to the shielding partition wall forming space; It characterized in that it comprises a blind layer having a shield partition formed by filling the absorbent colored ink.

In this case, the blind layer may be formed on both surfaces of the first film layer, and the shielding partition may be formed on the same straight line with the blind layer interposed therebetween.

The display device may further include a second film layer attached to the blind layer to reinforce the first film layer.

A blind layer may be formed on the second film layer to be bonded to the blind layer on the first film layer.

The apparatus may further include a third film layer attached to an opposite surface of the first film layer on which the blind layer is formed to reinforce the first film layer.

In addition, it may further comprise a polarizing film which is directly laminated laminated on the image emitting surface of the security film or spaced apart through the coupling means.

In addition, the first film layer, the second film layer, the third film layer, and the polarizing film is polypropylene oxide, polyisocyanate, hydroxyethyl, polyvinyl chloride (PVC), polyethylene terephthalate (PET), Monoacrylate, polyacrylate, polymethylmethacrylate, polyurethane, polycarbonate (PC), polyethylene, methacrylate, polypropylene, cellulose acetate butylate (CAB), ethylene vinyl acetate (EVA), polyvinyl alcohol (PVA), acrylate, hydroxyethyl, propyleneoxide, acryl and copolymers thereof, and glass, and one or two or more components selected from the group consisting of glass.

In addition, the first film layer, the second film layer, the third film layer, or the polarizing film preferably has a thickness of 10-2000um depending on the width and height of the shielding partition.

In addition, the at least one layer constituting the security film it is preferable to further include an image expression layer for implementing an image that is visible below a certain viewing angle of the user.

In addition, the blind layer formed by printing or transferring colored ink on one or both surfaces of the second film layer may be bonded to the blind layer on the first film layer so that the shielding partitions overlap.

In addition, a protective film (Liner) for preventing damage to the surface of each film constituting the security film may be further included.

In addition, the transparent ink may be made of a UV curing ink.

The colored ink may be UV ink, hot melt ink, or acrylic ink.

In addition, the security film, anti-reflection coating (anti-reflection coating), anti-static and anti-dust coating (anti-static coating), anti-radiation coating (anti-radiation coating), UV protection coating (Line Polarizer Coating), scratch-resistant coating It is preferable to further include one or more layers selected from the group consisting of a layer, a neutral density filter coating, and a line polarizer.

At this time, one or more layers constituting the security film is anti-reflection, anti-static, anti-static, anti-radiation, UV protection (Line Polarizer), scratch prevention It may be configured to include one or more components of the component having a sharpening enhancement, or a linear polarizer function.

Method of manufacturing a security film for a display device according to another aspect of the present invention,

A transmissive film forming step of printing a transmissive film with a transparent ink in a region other than a shielding partition wall forming space which is repeatedly arranged in parallel or lattice form at a distance from each other on at least one surface of the provided first film layer;

A permeation membrane drying and curing step of drying and curing the printed permeation membrane;

Filling the shielding partition wall filling the light absorbing colored ink in the shielding partition wall forming space; And

And a shielding barrier rib drying and curing step of drying and curing the shielding barrier rib.

At this time, the printing of the permeable membrane is in the fine precision printing process, UV printing process, roll to roll printing process, printed electronic process, fine precision printing process, flat screen process, roll screen process, PCB screen process, offset process, gravure process It can be done in one process. In addition, the permeable membrane forming step and the permeable membrane drying and curing step is preferably repeated one or more times.

The method may further include attaching a second film layer to the blind layer to reinforce the first film layer.

The method may further include attaching a third film layer reinforcing the first film layer to the opposite side of the blind layer forming.

The method may further include attaching a polarizing film disposed on the image emitting surface of the security film by directly laminating or spaced apart through a coupling means.

The method may further include forming an image expression layer on the at least one layer constituting the security film to implement an image visible at a predetermined viewing angle of the user.

In addition, the security film is anti-reflection coating (anti-reflection coating), anti-static and anti-dust coating (anti-static coating), anti-radiation coating (anti-radiation coating), UV protective coating (Line Polarizer Coating), scratch-resistant coating layer And further attaching one or more layers selected from the group consisting of a neutral density filter coating, and a line polarizer.

In addition, anti-reflection, electrostatic and anti-static, anti-radiation, UV protection, line polarizer, scratch prevention, on one or more layers of the security film, It may further comprise the step of including one or two or more components of the component having a sharpening enhancement, or line polarizer function.

According to the present invention, a security film for a display device and a method for manufacturing the same may be manufactured by simplifying a manufacturing process by easily forming a permeable membrane and printing a pattern and thickness, and by filling a barrier rib in a groove between the permeable membrane and the permeable membrane. It is possible to solve the collapse that may occur when the barrier rib is printed above a certain height.

In addition, it can be applied to various substrates (eg, glass or plastic), and can be applied to various printing processes such as screen printing, gravure, gravure offset, inkjet, and the like.

1 to 8 are cross-sectional views of the security film according to each embodiment of the present invention.
Figure 9 is a plan view illustrating the various patterns of the shielding partition applied to the security film of the present invention.
10 to 13 is an explanatory diagram illustrating a manufacturing process of a security film according to an embodiment of the present invention.
14 is an explanatory diagram illustrating a general principle of a security film.

The security film for a display device according to the first embodiment of the present invention includes a first film layer 10, and a blind layer 15 including a transmission film 15-2 and a shielding partition 15-1. . 1 is a cross-sectional view of the first embodiment. In the following description of the embodiments, the same components are denoted by the same reference numerals for convenience of explanation.

The first film layer 10 is prepared by adopting a material having a material, a standard, and a component necessary for manufacturing the security film of the present invention. At this time, the thickness of the film is different depending on the purpose and use of the security film, but usually in the range of 10 ~ 2,000㎛, may be various thickness as needed.

The transparent membrane 15-2 is composed of a transparent ink capable of transmitting light so that a user can see an image at a predetermined viewing angle or more, and the transparent ink forming the transparent membrane 15-2 is a transparent membrane of the present invention. Ensure sufficient permeability.

The transparent film 15-2 uses a transparent ink that can transmit the image image, and may be formed of UV ink or solvent ink, but UV ink is preferably used for fast curing.

The transparent ink for forming the permeable membrane 15-2 may include a resin and may optionally include a solvent, a polymerization initiator, a viscosity improver, an antioxidant, a wetting aid, a dispersant, a polymerization inhibitor, a sensitizer, and the like. Pigments which are usually colorants included in the ink are not included to ensure transparency, but may be included to some extent depending on the intended use.

Preferred examples of the resin include polypropylene oxide, polyethylene, polypropylene, ethylene vinyl acetate (EVA), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), polyethylene terephthalate (PET), cellulose acetate butyrate (CAB), Monoacrylate polyacrylate, polymethyl methacrylate, polyurethane, polycarbonate, propylene oxide, polyisocyanate, hydroxyethyl acrylate, hydroxyethyl methacrylate, or copolymers thereof.

The permeable membrane 15-2 is formed in an area excluding a pattern shape in which the shielding partition wall is to be formed, and the shielding partition wall 15-1 is repeatedly arranged in parallel or in a predetermined lattice form with a gap therebetween. Since the width is 5-100 μm, the height is 10-250 μm, and the spacing between the shielding partitions 15-1 is preferably 20-185 μm, the permeable membrane is formed in consideration of this.

The shielding partition wall 15-1 is composed of a light absorbing colored ink which is repeatedly arranged in a parallel or predetermined lattice form at a predetermined interval, and the width, height and spacing of the shielding partition wall 15-1 are It depends on the mutual optical interlocking action.

In the present invention, the shielding partition wall 15-1 preferably has a high absorbance to ensure sufficient blocking property. The shielding partition wall 15-1 uses colored ink capable of blocking an image, and may be formed of UV ink or solvent ink, but for fast curing, it is preferable to use UV ink. In case of using UV ink, it fills transparent and colored UV ink and irradiates UV lamp and cures instantly.

On the other hand, the colored ink forming the barrier rib 15-1 may include a pigment and a resin, and may optionally include a solvent, a polymerization initiator, a viscosity improver, an antioxidant, a wetting aid, a dispersant, a polymerization inhibitor, a sensitizer, and the like. .

In this case, an organic or inorganic pigment or dye may be used as the pigment, an organic pigment may be used when forming a high concentration shielding, and an inorganic pigment may be used when forming a low concentration shielding. In particular, when a pigment having a high concentration and high absorbance is mixed with a low concentration and low absorbance pigment that can prevent diffuse reflection, a clear image can be provided by blocking the distorted image output of the security film. At this time, colored ink is particle size It is preferable that it is about 2 nm-18 micrometers.

Further preferred examples of the resin include polypropylene oxide, polyethylene, polypropylene, ethylene vinyl acetate (EVA), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), polyethylene terephthalate (PET), cellulose acetate butyrate (CAB) Monoacrylate polyacrylate, polymethyl methacrylate, polyurethane, polycarbonate, propylene oxide, polyisocyanate, hydroxyethyl acrylate, hydroxyethyl methacrylate, or copolymers thereof.

Meanwhile, the shielding partition wall 15-1 is formed on the surface of the first film layer 10 by filling the colored ink with a squeeze or a blade in a region where the permeable membrane 15-2 is not formed.

The shielding partition wall 15-1 may be formed on one surface or both surfaces of the first film layer 10, and when the shielding partition wall 15-1 is formed on both surfaces of the first film layer 10, FIG. As shown, the shielding barrier ribs 15-1 formed on both surfaces of the first film layer 10 may be formed at the same position to overlap each other to extend the thickness.

As shown in FIG. 3, the second embodiment according to the present invention further includes a second film layer 20 in the first embodiment. The second film layer 20 is attached to the blind layer 15 to reinforce the first film layer. As the material of the second film layer, materials listed in the first film layer may be used. In order to attach the second film layer 20, an adhesive layer may be further added between the blind layer 15 and the second film layer 20.

Meanwhile, the blind layer 15 may be formed on one surface or both surfaces of the second film layer 20, and as shown in FIG. 4, the shield partition wall 15-1 of the blind layer 15 may be formed on the first film layer 10. By overlapping the shielding partition wall 15-1, it may be bonded to the blind layer 15 on the first film layer 10.

As shown in FIG. 5, the third embodiment of the present invention may further include a third film layer 30 attached to the opposite surface of the blind layer 15 to reinforce the first film layer 10. An adhesive layer may be further added to attach the third film layer 30.

The fourth embodiment according to the present invention may further include a polarizing film 40 disposed on the image exit surface of the security film spaced apart through the coupling means or directly laminated and laminated as shown in FIG. 6 or 7. The polarizing film 40 further diffuses and transmits the image transmitted through the blind layer 15, and more reliably blocks a shielding image that is not transmitted through the shielding partition 15-1 or an image with less shielding. The polarizing function, if necessary, may add another polarization function to the security film, depending on the purpose and purpose of use, the reflection and refraction of light, the linearity of the light, the law of reflection, You can apply functions such as total reflection and dispersion, polarization of light, surface reflection prevention, and conversion of non-polarization to linear polarization.

The fifth embodiment according to the present invention further includes an image expression layer as shown in FIG. 8. Each of the first film layer 10, the second film layer 20, the third film layer 30, the polarizing film 40, and the blind layer 15 of each of the above-described embodiments may include an image of a security film. An image expression layer 50 for displaying a character, a logo, a character, etc. may be formed at an angle where the output image screen of the lower, left, right, and position is not visible, and when viewed from the front of the user, the image expression layer 50 may be formed. It may be clearly visible on the upper, lower, left, and right sides of the user.

The image expression layer 50 is a surface of any one of the first film layer 10, the second film layer 20, the third film layer 30, and the polarizing film 40 as a desired color pigment. It can be formed by printing or transferring onto.

For example, in forming the image expression layer 50, after the transfer layer is formed on the surface of the fabric (for example, paper fabric), the first film layer 10 or the second, third film layer 20 , 30) and the transfer layer generated on the fabric to one side of the polarizing film layer 40, and then formed on the fabric by applying a proper temperature and pressure to the back of the fabric using a heat transfer machine to the image expression layer 50 Can be formed.

As another example, the blind layer 15 may be filled with an ink of a different color from the shielding film by filling a portion of a logo or letter to be expressed on a portion of the shielding partition when printing or transferring the shielding partition. Even in this case, the front face does not look like a shielding barrier of the security device, and the image expression layer is expressed as an image of a printed color in left, right, up and down sides.

According to the sixth embodiment of the present invention, the anti-reflection coating, the anti-static coating, the anti-radiation coating, the anti-radiation coating, and the UV blocking coating One or more layers selected from the group consisting of (Line Polarizer Coating), anti-scratch coating layer, neutral density filter coating layer, and line polarizer layer may be further included. These additional layers may be attached to any one surface of the first film layer 10, the second film layer 20, the third film layer 30, and the polarizing film layer 40.

According to the seventh embodiment of the present invention, anti-reflection, static electricity and dust prevention are prevented in at least one of the above-described first film layer, second film layer, third film layer, polarizing film layer, and blind layer. (anti-static), anti-radiation, line polarizer, anti-scratch, sharpening, or may be configured to include one or more of the components having a line polarizer function. .

Meanwhile, the materials of the first film layer 10, the second film layer 20, the third film layer 30, or the polarizing film 40 used in the present invention are materials, standards, and components required for manufacturing a security film. Polypropylene oxide, polyisocyanate, hydroxyethyl, polyvinyl chloride (PVC), polyethylene teretrile with proper resistance to temperature, deformation, pressure, humidity, discoloration, etc. Phthalate (PET), monoacrylate, polyacrylate, polymethylmethacrylate, polyurethane, polycarbonate (PC), polyethylene, methacrylate, polypropylene, cellulose acetate butylate (CAB), ethylene vinyl acetate (EVA ), Polyvinyl alcohol (PVA), acrylate, hydroxyethyl, propylene oxide, acrylic and copolymers thereof, and one or more selected from the group consisting of It is preferable that it consists of components. In particular, fabrics with enhanced elasticity, including polyurethane, are used to protect liquid crystals and screens from external impacts and scratches on key structures that are fragile and exposed to damage, such as computer monitors, cell phones, LCD screens, and building glass. Can protect. Meanwhile, the thickness of each film may be variously configured in the range of 10 to 2000 μm in conjunction with the width and thickness of the shielding partition formed.

In addition, each film, such as the first film layer, the second film layer, the third film layer, or the polarizing film constituting the security film according to the present invention may further include a protective film (Liner) for preventing damage to the film surface. The protective film is made of polypropylene, polyethylene terephthalate, oriented polypro-pylene (OPP) or polyvinyl chloride (PVC), and the surface-release treated by using a polyethylene coating with a thickness of 2 ~ 30㎛ on the surface It is preferable.

On the other hand, the material and components of the general material at the time of coating the main coating material such as ink printing for forming the shielding barrier of the security device, image ink printing for the image layer, adhesive coating for film lamination, adhesive for preparing the bonding means In the case of using, there is no need for the initial coating, but in the case of using the special purpose and purpose or the material and ingredient of the material, according to the chemical composition and characteristics of each material, the pigment, adhesive, and adhesive used are separated from the coated film. Before the main coating material coating process to prevent the separation and fall, and to ensure that each coating material is deposited as fine particles on the surface of the film, irrespective of the film and coating material raw material and type and chemical composition characteristics and materials As a step, a pristine coating (primer coating) process may be performed.

It is possible to increase the tension of the surface to be coated by Ahnka coating with a primary coating material mainly composed of a liquid urethane resin or silica, or to improve the surface tension of the coating by performing surface modification on the surface of the fabric by plasma treatment. .

Such a primary coating material is generally used for a film formed of a material which does not (settle) the main coating material on the film to be coated by the material, component, and surface condition when the main coating material is coated on the film to be coated. Film fabrics, such as PVC, are manufactured using resins, stabilizers, plasticizers, non-offset plasticizers, etc., during processing and manufacturing. Phenomenon, that is, white flower like pollen or oily liquid, pushes away the components of the main coating material coated on the surface, or the surface of the fabric of the material may be settled. Long-term function of coated main coating material prevents falling of coated material on material with low surface tension Function to keep the

The primary coating material is 10 to 60% by weight of the main component of the urethane and silica component resins depending on the film material and the surface tension conditions of the coating target surface, the solvent used, non-methyl formamide (BMF), After interlocking 90% to 40% by weight of methyl ethyl ketone (MEK) or toluene, perform a dissolution process, set the temperature of the reactor in the range of 10-30 degrees Celsius, and connect the pump, motor and cooler to the reactor. After performing the stirring process at a pressure according to the requirements, and then aged for 3 to 5 hours to produce the primary coating material as a low viscosity liquid phase.

On the other hand, in the preparation of the adhesive and the adhesive for use in the present invention, the adhesive layer used for laminating the first, second, and third films and the polarizing film is a hot melt copolymer, which is an ethylene vinyl acetate copolymer as the main material of the hot melt copolymer. Copolymer (EVA), polyamide, polyester, polyurethane, rubber and resins rosin, ester feeling, terpene resin, paraffin resin, wax wax, paraffin, microcrystalline wax, plasticizer DBP, diphenyl chloride, chloride Paraffin and fillers are calcium carbonate, varistor, talc, kaolin, and as antioxidants, paraalkylphenols are used as raw materials, resins, waxes and solvents, depending on the adhesive and adhesive strengths required for the use of products and the viscosity conditions required for manufacturing. After interlocking mixing with a weight in the range of 5 to 95%, perform the dissolution process, set the temperature of the reactor in the range 15 to 105 degrees Celsius, and connect the pump, motor and cooler to the reactor After that, the stirring is carried out at a pressure according to the requirements, and then prepared by performing a aging process in a range of 12 to 15 hours.

The adhesive (or adhesive) is Hot Melt Adhesive or Acrylic Adhesive having Conformability (curable, anti-curling) / Curling conditions for the film to be coated. It is preferable to adopt an emulsion type.

The adhesive 100 used when attaching the security film to the installation target screen is an acryl-based copolymer, which is the main component of acryl-based ethylhexyl acrylate monoma, butylacylate monoma, ethyl acrylate monoma, ethylacetate, methyl metacylate, According to the adhesive and adhesive strength required for the use of the product and the viscosity conditions required for manufacturing the product, the raw material and the solvent are interlinked and mixed at 10 to 90% by weight, respectively, followed by the dissolution process, and the temperature of the reactor is 25 ~ Celsius. After setting the range to 125, the pump, the motor and the cooler are connected to the reactor, the stirring process is performed at a pressure according to the requirements, and then the acrylic adhesive material is generated after the aging process in the range of 8 to 12 hours. By coating on the security device, it can be easily detached and attached to the screen to be attached when using the security device.

9 illustrates various patterns of the shielding partition formed in the present invention. According to this, the blind layer of the security film according to the present invention is that the shielding partition wall blocking the incident image is repeatedly arranged in a grid form of parallel or a predetermined angle at a predetermined interval, parallel to the left and right in the form as shown in Figure 9a In the case of forming the shielding partition, the screen is not visible in the vertical direction of the screen, and when the shielding partition is formed in parallel in the vertical direction as shown in FIG. 9B, the screen may not be visible in the left and right directions. In addition, in order to prevent access at a particular angle, such as 45 degrees, 60 degrees, 75 degrees, parallel shielding partitions may be configured to have a predetermined angle suitable for the purpose.

In addition, the shielding partition may be configured to be arranged in a lattice shape at a predetermined angle. As shown in Figure 9d, it may be configured in the form of a grid consisting of 90 degrees up, down, left and right, or may have a grid shape described at a predetermined angle as shown in FIG.

If the shielding partitions are formed to be arranged in parallel, as shown in FIGS. 9A, 9B, and 9C, the image of the monitor M may not be easily seen within a predetermined angle except the front surface. In addition, as shown in FIGS. 9D and 9E, when the barrier ribs have a grid shape, the image may not be easily viewed from an angle other than the front surface.

As such, when the image of the monitor is viewed from the front due to the blind layer formed on the first film layer or the first and second film layers, a clear screen can be seen without blurring or distortion of the image. When viewing the image of the monitor at an oblique angle from the left and the right, the screen of the monitor is not visible because the image is blocked by the shielding partition.

Hereinafter will be described an embodiment of a method of manufacturing a security film for a display device of the present invention. The manufacturing method of the security film according to the first embodiment includes a permeable membrane forming step, permeable membrane drying and curing step, shielding partition wall filling step, shielding partition wall drying and curing step.

The permeable membrane forming step is a step of printing the permeable membrane with a transparent ink on the first film layer (FIG. 10). At this time, the printing process includes, but is not limited to, fine precision printing process, UV printing process, roll-to-roll printing process, printed electronic process, fine precision printing process, flat screen process, roll screen process, PCB screen process, offset process, and gravure process. One process can be chosen. For example, in the case of a flat screen printing process, a fine printing process may be applied and a transparent ink may be printed using a squeeze or a blade to form a permeable membrane pattern except for a region where a shielding partition is to be formed.

The permeable membrane drying and curing step is a step of drying and curing the formed permeable membrane, and the drying and curing may be applied with heat, UV, or the like (FIG. 11).

When the permeable membrane is formed by the printing method as in the present invention, the permeable membrane forming step, the permeable membrane drying and the curing step may be repeated one or more times to form the height of the permeable membrane to a desired height.

Filling the shielding partition wall is a step of filling the colored ink in the area between the permeable membrane is applied to the colored ink on the permeable membrane and then pushed with a blade or squeeze to fill the colored ink in the space between the permeable membrane (Fig. 12).

The barrier rib drying and curing step is a step of drying and curing the filled barrier rib (FIG. 13).

The method of manufacturing a security film of a second embodiment according to the present invention further includes attaching the second film layer to the blind layer.

The manufacturing method of the security film of the third embodiment according to the present invention further includes the step of adhering to the opposite side of the third film layer blind layer forming reinforcing the first film layer.

The method of manufacturing a security film according to a fourth embodiment of the present invention further includes attaching a polarizing film disposed on the image emitting surface of the security film by directly laminating or spaced apart through a coupling means.

The manufacturing method of the security film of the fifth embodiment according to the present invention, the first film layer, the second film layer, the third film layer, the polarizing film, the blind layer any one of the layers of the upper, lower, left, right, And forming an image expression layer 50 that causes characters, logos, characters, and the like to appear at an angle at which the output image screen of the position is not visible. The image expression layer is formed by printing or transferring an image on any one surface of the first film layer, the second film layer, the third film layer, and the polarizing film as an image pigment.

The manufacturing method of the security film of the sixth embodiment according to the present invention further includes the step of forming an additional layer. Additional layers include anti-reflection coating, anti-static coating, anti-radiation coating, anti-radiation coating, line polarizer coating, anti-scratch coating, Neutral filter filter layers and line polarizers may be listed without limitation, and these additional layers may be one of the first film layer, the second film layer, the third film layer, and the polarizing film layer. It can be attached to either side.

For example, a process of printing pigments and pastes for an additional layer meeting the use conditions required on one side of the first, second and third film layers and the polarizing film layer may be performed.

In addition, the process of forming the additional layer may use a chemical or thin film deposition method.

In the manufacturing method of the security film according to the seventh embodiment of the present invention, the components forming the additional layer may be formed on at least one of the above-described first film layer, second film layer, third film layer, polarizing film layer, and blind layer. It further comprises the step of being included.

For example, in implementing the additional functions for improving functions such as blocking various harmful waves, enhancing the clarity, etc. in the security film according to the present invention, the color for forming the barrier ribs printed on the first film layer or the first and second film layers. A pigment and a paste, a suspension, a sol type, and the like for the present additive function may be mixed with the pigment and the colored adhesive pigment to be simultaneously with the blind layer forming printing.

Alternatively, the production of the first, second, third film raw film may be completed by including a pigment and a paste for the above additional function.

Meanwhile, in laminating the first film layer, the second film layer or the third film layer 30, the polarizing film, and the protective film in the manufacturing method of the above-described embodiments, a blind layer including a shielding partition on the first film layer After the formation, the first film layer having a blind layer formed on the plate surface can be used alone as it is, according to the purpose and purpose of use of the security device, the occluded shielding partition walls of the first and second films, and then using a heat press bonding The first and second film layers may be heat press-bonded and laminated at an appropriate temperature and pressure suitable for the components and materials of the pigments coated on the first and second film layers. In addition, among the various methods such as flat lamination method, roller lamination method, and manual lamination using a press for small quantity production, using a heat-pressing press with a heating and pressurizing function together with the third film layer or the polarizing film on the other surface of the first film layer. One hot press bonding process can be selected and performed.

As another method, the adhesive may be applied to one surface of the first film layer or one surface of the second film layer, and then the second film layer 20 may be laminated alone using a pressure-bonding paper, or, if necessary, the first film. The third film layer or the polarizing film may be provided on the adhesive layer provided on the other surface of the layer 10.

That is, the second, third film layer or the polarizing film may be provided on both sides of the first film layer in pairs.

On the other hand, the release member for protecting the pressure-sensitive adhesive layer coated on the first, second, third film layer or the polarizing film image incident surface with the coupling member of the security device, and the protective film for laminating the surface of the image exit surface A protective film can be provided.

The lamination process may be performed by selecting one of a variety of processes, such as a plate lamination method, a roller lamination method and a manual lamination using a press for a small amount of production using a pressure bonding machine having a pressure bonding lamination function.

In addition, when forming the image shielding partition wall of the first, first, or second film layer, utilizing the adhesive component of the image shielding partition pigment formed by mixing and coating a color pigment and a transparent UV adhesive resin on the plate surface of the first, second film layer. Thus, the first film layer coated surface and the second film layer coated surface of the color pigment adhesive resin image shielding partition formed on the first and second film layers may be completed by pressing and laminating.

In addition, if necessary, the third film layer or the polarizing film may be laminated on the adhesive layer provided on the other surface of the first film layer by hot press bonding.

On the other hand, in order to perform the hot pressing lamination process, the first, second, and third film layer and the polarizing film and the components, material properties, such as pigments, adhesives, pressure-sensitive adhesives, resins, and the appropriate temperature corresponding to each specification characteristics After setting the time and the temperature, the temperature is in the range of 35 to 280, the pressure is 22 to 110MPa, after the compression process for 1 second to 5 minutes in parallel to prevent the generation of bubbles by the vacuum process, the components, material properties However, artificial or natural cooling processes can be carried out in accordance with the specifications.

In addition, the adhesive resin of the colored ink is partially transferred to the counterpart film during the hot pressing bonding process to serve as a bonding member, and the components of the colored ink may be partially transferred to the counterpart film.

In addition, the temperature, pressure, running time and corresponding relationship between the first, second, and third film layers, the polarizing film and the pigments used, the adhesives, and the adhesives set according to the respective components, the material properties, and the respective standard properties. Due to the change in physical properties, the screen distortion phenomenon of the security device is eliminated, and a clearer screen can be provided.

In the drying and hardening process after lamination with barrier ribs, image layers, adhesives and adhesive coatings, no special drying process is generally required, but a precise drying process is required to maintain the perfect quality of the security device depending on the materials used. In addition, this drying process may be performed by Digital-PID-Auto Tuning temperature control method to ensure the high temperature distribution to prevent deformation or damage of the film and maintain high quality.

In the drying process, an appropriate temperature and time corresponding to the materials and components of the barrier ribs and the image layer forming pigment, the adhesive for the lamination, the adhesive for the security group, and the first, second, and third film layers or the polarizing film are applied. In order to prevent the spreading, spreading and blowing of the printed pigments, UV is irradiated with a dryer having a quick drying and curing function, and various drying such as a duct cone bare drying method, a hot air and a hot wire drying method, and a thermal drying method. The process can be performed in parallel to a curing or drying process.

The drying step may be performed for 1 second to 5 minutes at room temperature or 35 ~ 300 ℃ temperature according to the component ratio and conditions such as ambient temperature and humidity.

In addition, after dissolving and coating each raw material component and a corresponding solvent, the solvent may be evaporated to dryness in a drying process to allow the respective raw material components to settle.

On the other hand, it is also possible to use a film of a difficult material, or UV curing agent may be used to form a coating film thickness, and to stabilize the pigment and improve the optical security of the pigment.

At this time, the amount of the UV curing agent is slightly different depending on the film fabric and the required physical properties, but can be generally added in the range of 1 to 8% by weight of the pigment used.

The scope of the present invention should not be construed and used as being limited only to the matters, techniques, processes, machines, materials, etc. of the present invention, and the protection scope of the present invention, as well as the matters described in the claims, Applications, improvements and modifications from the teachings of the present invention will be apparent to those skilled in the art and will also fall within the protection scope of the present invention.

1: Security film 10: First film layer
20: second film layer 30: third film layer
40: polarizing film 50: image expression layer
15, 25: blind layer 15-1, 25-1: shielding partition
15-2, 25-2: permeable membrane

Claims (24)

delete delete delete delete delete A first film layer;
A transmissive layer which is printed with transparent ink in an area other than the shielding partition wall forming space which is repeatedly arranged in parallel or lattice form at a distance from each other on at least one surface of the first film layer, and transmits an image to the shielding partition wall forming space; It is formed as a blind layer having a shielding partition formed by filling the absorbent colored ink,
A second film layer attached to the blind layer to reinforce the first film layer;
In the security film comprising a third film layer attached to the lower surface of the first film layer to reinforce the first film layer,
The polarizing film which is directly laminated on the image emitting surface of the security film and laminated or spaced through the coupling means to diffuse and transmit the transmitted image more evenly and more effectively block the shielded image or the image with less shielding. Security film for a display device, characterized in that further formed. The method of claim 6,
The first film layer, the second film layer, the third film layer, and the polarizing film are polypropylene oxide, polyisocyanate, hydroxyethyl, monoacrylate, polyacrylate, polymethyl methacrylate, polyurethane , Methacrylate, polypropylene, cellulose acetate butyrate (CAB), ethylene vinyl acetate (EVA), polyvinyl alcohol (PVA), acrylate, hydroxyethyl, propylene oxide Security film for display device, characterized in that made. The method of claim 7, wherein
The first film layer, the second film layer, the third film layer or the polarizing film is formed to have a thickness of 10-2000㎛ according to the width and height of the shielding partition wall so that the shielding partition between the transmission membrane does not collapse during printing. Security film for display device characterized in that. The method of claim 6,
Any one of the first film layer, the second film layer, the third film layer, the polarizing film, and the blind layer is hardly visible when viewed from the front of the screen, and characters, logos, and letters are formed on the upper, lower, left, and right sides of the screen. Security film for a display device, characterized in that the image expression layer printed or transferred so that the back is clearly visible. delete delete delete delete The method of claim 6,
The security film is formed from an anti-radiation coating, anti-radiation coating, line polarizer coating, anti-scratch coating layer, neutral density filter coating, and line polarizer. Security film for display further comprising one or more layers selected. The method of claim 6,
One or two or more layers constituting the security film may include one or two or more components having an anti-radiation, line polarizer, anti-scratch, sharpening, or line polarizer function. Security film for display device, characterized in that configured to include. delete delete delete delete delete A transmissive film forming step of printing a transmissive film with a transparent ink in an area except a shielding partition wall space that is repeatedly arranged in parallel or lattice form on a blind layer with a spaced interval on at least one surface of a first film layer provided;
A permeation membrane drying and curing step of drying and curing the printed permeation membrane;
Filling the shielding partition with a light absorbing colored ink in the shielding partition forming space; And a step of drying and curing the shielding partition to dry and cure the shielding partition.
Attaching a second film layer reinforcing the first film layer to the blind layer;
In the manufacturing method of the security film for a display device comprising the step of attaching a third film layer reinforcing the first film layer on the opposite side of the blind layer formation,
Method of manufacturing a security film for a display device further comprising the step of attaching the polarizing film which is directly laminated on the image emitting surface of the security film is laminated or spaced apart through the coupling means. The method of claim 21,
One of the first film layer, the second film layer, the third film layer, the polarizing film, and the blind layer constituting the security film is hardly visible when viewed from the front of the screen, but is on the upper, lower, left, and right sides of the screen. A method of manufacturing a security film for a display device further comprising the step of forming an image expression layer printed or transferred so that characters, logos, characters, etc. are clearly visible. The method of claim 21,
The security film is selected from the group consisting of an anti-radiation coating (anti-radiation coating), a sun protection coating (Line Polarizer Coating), a scratch prevention coating layer, a neutral density filter coating (neutral density filter coating), and a line polarizer (Line polarizer) Method of manufacturing a security film for a display device comprising the step of further attaching one or more layers. The method of claim 21,
One or two or more of the components having an anti-radiation, line polarizer, scratch prevention, sharpening, or line polarizer function on one or more layers of the security film Method of manufacturing a security film for a display device further comprising the step of including.

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