KR20120118447A - 3d plastic sheet for inkjet printing - Google Patents

Abstract

PURPOSE: A 3D plastic sheet is provided to have a surface have specific curvature by filling gap valleys of convex lenses with an ink-absorbing coating agent. CONSTITUTION: A primer coating layer(40) of a 3D plastic sheet bonds an ink-absorbing coating layer(50) and a convex lens layer(10). The thickness of the primer coating layer is 10 micron or less. A transparent thickness layer(20) is formed to a thickness that a focus of incident rays penetrating through the ink-absorbing coating layer and the primer coating layer is formed on an uneven pattern layer(30). An interlaced primary picture is printed on the uneven pattern layer to be shown through the outer surface of the transparent thickness layer.

Description

Three-dimensional sheet for inkjet printing {3D PLASTIC SHEET FOR INKJET PRINTING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional sheet for inkjet printing by applying integral photography (IP) technology, and more particularly, a lens array in which hemispherical convex lenses form a horizontal and vertical arrangement on an upper surface of a sheet. Is formed, and on the other side, the embossed or intaglio pattern is formed in the total reflection angle at the same pattern angle as the convex lens pattern on the upper surface, so that the concave-convex patterns are enlarged and three-dimensionally seen from the front surface of the convex lens, such a three-dimensional plastic sheet In the process of enabling inkjet printing, the problem of maintaining the print quality and ink color development of inkjet print as a transparent sheet is solved. To solve the three-dimensional plastic sheet production technology and three-dimensional expression technology Yonghan relates to ink jet printing only the three-dimensional sheet.

In the prior art and patent application No. 10-2009-0000975, a clear offset of relief texture and jewel feeling by the back uneven pattern as well as a general offset printing that is clearly printed when viewed from the top of the lens array (Lens Array) It creates a realistic three-dimensional appearance, and even if a three-dimensional surface sheet is placed on a white object or a dark object, the shape of the irregularities on the back is not diffusely reflected, and the outline or shape of the irregularities is clearly enlarged and the direction in which the sheet is placed. Irrespective of the location, you can see a clear three-dimensional screen and increase the productivity by reducing the difficult and sophisticated printing process in the conventional three-dimensional printing sheet manufacturing method, and offset the lens array and irregularities Clear by eliminating unsightly moire caused by structural interference with printing It is a main object to provide a three-dimensional surface sheet by total reflection so that three-dimensional images can be viewed.

In addition, conventional methods do not have a structure in which a consumer can directly execute printing using a personal printer or the like. The reason is that the surface of the three-dimensional sheet is made of smooth synthetic resin, so it cannot be printed like paper.

In addition, even if the coating treatment for ink adsorption to enable inkjet printing, in the ink adsorption coating treatment on the surface of the convex lens of the three-dimensional sheet, the adhesion durability is lowered and the three-dimensional feeling is lost.

In addition, when printing with a general ink absorption coating process for inkjet printing due to the characteristics of a three-dimensional surface sheet made of transparent material, the three-dimensional printing sheet is not a white sheet, so the color projected from the back and the printing color are combined to print quality. This is seen in a very dull color that is seen apart, resulting in a decrease in the color development of the print.

The present invention was devised in view of the above-described problems, and it is possible to maintain a three-dimensional effect, durability, ink color development, etc. in the process of producing ink adsorption coating and printing on a surface of a 'stereoplastic sheet' rather than a conventional general paper or sheet. It is necessary to solve the problems in the process for the process, and the problems to solve the problem are as follows.

First, the three-dimensional plastic sheet basically has a three-dimensional effect by the convex lenses 11, so that the ink adsorption coating completely fills the valleys of the convex lenses 11 so that the surface is not flat. It should be kept in the form of a convex lens with a constant radius of curvature,

Second, the adhesion durability between the ink adsorption coating agent and the convex lens layer 10 of the 'stereoplastic sheet' is enhanced, and the curvature radius formed on the surface of the ink adsorbent and the refractive indices of the materials constituting the three-dimensional sheet 1 for inkjet printing. Considering the focal length and the thickness of the 'stereoplastic sheet'

Third, the three-dimensional sheet (1) for inkjet printing inhibits the color development of the ink in a transparent state, so to compensate for this, the visual three-dimensional effect must be maintained in the three-dimensional sheet (1) for the inkjet printing.

Therefore, the purpose of the digital inkjet printing on the three-dimensional plastic sheet to be seen in three-dimensional plastic material to maintain the print quality and color development as possible as a transparent three-dimensional material, it was difficult to realize in the processing process for inkjet printing of the three-dimensional plastic sheet In order to solve the problem, to provide a three-dimensional sheet capable of vivid printing in a state where excellent three-dimensional effects or special effects are maintained.

A feature of the present invention for achieving the above object is a convex lens that is the uppermost surface of the translucent 'stereoplastic sheet 3' to have a light transmittance of 50% or more mixed with a master batch in a transparent synthetic resin raw material. On the surface of the layer (10), an ink adsorption coating layer for ink jet printer (50) is formed; A primer coating layer 40 is formed on the bottom surface thereof so that the ink adsorption coating layer 50 and the convex lens layer 10 made of a transparent synthetic resin can be strongly adhered to each other; A convex lens layer 10 formed on the lower surface of the semi-spherical convex lenses 11 constituting the translucent three-dimensional plastic sheet 3 to form a vertically vertical pattern array or a 60 degree cross array; The curved surface formed on the lower surface of the ink adsorption coating layer 50 and the primer coating layer 40 has a radius of curvature larger than that of the convex lens 11, but the focal length t0 is due to the refraction of incident light passing therethrough. A translucent thick layer 20 configured to form a middle layer of the translucent 'stereoplastic sheet 3'; The concave-convex pattern layer 30 on the bottom surface of the translucent thick layer 20 has a pattern arrangement structure of the same angle as the convex lens layer 10, and the three-dimensional effect and the special effect can be obtained by the difference in the density of the pattern arrangement of the concave-convex (31). The irregularities pattern layer 30 formed at the bottom of the semi-transparent 'stereoplastic sheet 3' is characterized in that the cross-sectional shape of each unevenness 31 is a hemispherical shape or a polygonal shape, including a partial total reflection angle for the three-dimensional observation point. )and; The ink adsorption coating layer 50, the primer coating layer 40, the convex lens layer 10, the transparent thickness layer 20, and the uneven pattern layer 30 is composed of a sheet characterized in that It can be achieved by the three-dimensional sheet 1 for inkjet frit.

According to the present invention, the three-dimensional plastic sheet can be printed on a three-dimensional plastic sheet, which has not been possible in the past, and has a durable inkjet printing method. , Home or commercial inkjet printers, etc. There is an advantage that the consumer can directly produce a three-dimensional print, and also as a semi-transparent three-dimensional sheet to maintain the three-dimensional impression while maintaining the color development of the color as possible, and printed three-dimensional The plastic sheet has a variety of effective advantages, such as maintaining the three-dimensional and print color development as a 'three-dimensional sheet for inkjet printing' by solving the problems that were difficult to realize in the past and the structural problem of the printing color development as a transparent sheet. .

1 is an exploded perspective view illustrating an embodiment of the present invention.
2 is a cross-sectional view illustrating an embodiment of the present invention.
3 is a cross-sectional view illustrating a first process of the present invention.
Figure 4 is an enlarged partial cross-sectional view illustrating a comparison of the configuration of a conventional 'stereoplastic sheet (2)' and 'three-dimensional sheet for inkjet printing (1) according to an embodiment of the present invention.
FIG. 5 is a partially enlarged cross-sectional view illustrating a process of refraction and condensing incident light to obtain a focal length and a sheet thickness value based on the curvature radius value; FIG.
6 is a cross-sectional view illustrating an embodiment of the present invention.
7 is a cross-sectional view illustrating an embodiment of the present invention.
8 is a diagram illustrating an embodiment for solving the problems of the present invention.
9 is a view illustrating that the 'stereoplastic sheet 3' is configured in a double layer structure according to another embodiment of the present invention.
FIG. 10 is a view illustrating that a 'stereoplastic sheet 3' is composed of a multilayer (three or more layers) structure according to another embodiment of the present invention.
11 is a cross-sectional view illustrating another embodiment of the present invention.
12 is a cross-sectional view illustrating a three-dimensional sheet dedicated for UV inkjet printing as another embodiment of the 'three-dimensional sheet for ink jet printing 1'.
Fig. 13 is a partially enlarged cross sectional view illustrating another temporary example of the present invention.
14 is a partially enlarged cross-sectional view illustrating another temporary example of the present invention.
15 is a partially enlarged cross-sectional view illustrating yet another temporary example of the present invention.
16 is a partially enlarged cross-sectional view illustrating yet another temporary example of the present invention.

Hereinafter, described in detail by the accompanying drawings a preferred embodiment for achieving the above object is as follows.

1 is an exploded perspective view illustrating an embodiment of the present invention;

2 is a cross-sectional view illustrating an embodiment of the present invention.

As shown in FIGS. 1 and 2, the ink adsorption coating layer 50, the primer coating layer 40, the convex lens layer 10, the transparent thickness layer 20, and the three-dimensional uneven pattern layer 30 are sequentially formed from the top. have.

3 is a cross-sectional view illustrating a first process of the present invention.

Figure 4 is an enlarged partial cross-sectional view illustrating a comparison of the configuration of a conventional three-dimensional plastic sheet (2) and the three-dimensional sheet (1) for inkjet printing according to an embodiment of the present invention.

Conventional three-dimensional plastic sheet 2 is a three-dimensional surface decorative material when the convex lens layer 10, transparent thickness layer 20, three-dimensional uneven pattern layer 30 is composed of a single sheet can be completed Although it has been described above that it can not be used as a three-dimensional sheet (1) for inkjet printing.

Therefore, as shown in FIGS. 3 to 4, in the three-dimensional sheet 1 for inkjet printing, an ink adsorption coating layer 50 is formed at the top and a primer coating layer 40 for durability is formed at the bottom thereof. It is to illustrate that.

In addition, the three-dimensional plastic sheet 3 constituting the three-dimensional sheet 1 for inkjet printing has a convex lens layer 10, a transparent thickness layer 20, a three-dimensional uneven pattern layer 30 or three-dimensional printing. Although it is composed of (71) layers, it can be produced according to the shape of the convex lens layer 10, divided into 'three-dimensional sheet by the lenticular' and 'three-dimensional sheet by the lens array', 'three-dimensional sheet by the lenticular Is a lenticular lens pattern structure in which the convex lens layer 10 is arranged in a series of semi-cylindrical lenses, and a three-dimensional printing 73 or an uneven pattern 30 layer is formed on the rear surface of the lens sheet. When viewed from the front, it is a sheet that exhibits a three-dimensional or special effect, and 'three-dimensional sheet by lens array' is a three-dimensional surface on the back of the lens array sheet in which hemispherical convex lenses form a vertical cross array or a 60 degree cross array. Print 73 or uneven pattern 30 layer And when viewed from the front of the lens array sheet is also configured to view a three-dimensional or annotation.

In addition, the present invention is based on the premise that the primer coating layer 40 and the ink adsorption coating layer 50 should be further configured on the surface of the three-dimensional plastic sheet 3.

And the method of coating in the three-dimensional sheet (1) for inkjet printing of the present invention, when spraying the ink on the surface of the three-dimensional plastic sheet (3), so that the ink can be absorbed or fixed well For the purpose of coating the ink adsorbent consisting of a number of synthetic materials or coating treatment for durability separately, the coating treatment method is to use a spray method, a roll coater method, a doctor blade method.

In addition, as the ink adsorption coating agent 50, a synthetic material composed of silica, a binder, an ink absorption aid, or the like is used. As the primer coating agent 40, an adhesive synthetic material, which is a mixture of acrylic or polyurethane, is mainly used. The invention is not limited to the materials used and the coating method.

However, when such coatings are applied or coated on the surface of the convex lens layer 10 of the three-dimensional plastic sheet 3, the shape of the convex lens 11 disappears because the three-dimensional sheet fills the gap between the convex lenses 11. Or deforms and causes the stereoscopic or special effects represented by the original convex lens 11 to disappear, so that the three-dimensional expression is maintained even when these coatings 40 and 50 apply the surface of the convex lens layer 10. The coating layers 40 and 50 must be coated to maintain the shape of the convex lens.

That is, even when the coating is completed, rather than completely filling the valleys of the convex lenses 11, the radius of curvature in the form of each convex lens is formed so that the focal length is formed and the ' It is because the thickness of the three-dimensional sheet 1 for inkjet printing should be determined.

In addition, as a basic inkjet frying paper, in order to have reliability for quality assurance, after the user prints with the inkjet fritter, the stability of ink absorption and fixation, the peeling of the ink or the peeling of the ink adsorbent should be guaranteed. The method to solve is the primer coating (40) treatment.

However, such a peeling problem does not usually occur as a large problem in general inkjet media paper, the surface of the three-dimensional plastic sheet (3) used in the present invention is not a paper or a fabric, but a deep uneven surface and a smooth plastic according to the material Particular attention should be paid to the ball roll lenses 11 on the surface.

In addition, no matter how excellent the absorbent quality of the ink adsorbent, since the plastic surface of the convex lens layer 10 constituting the three-dimensional sheet 1 for inkjet printing has a radius of curvature on the deep uneven surface, the convex lens Even if the ink adsorbent is not sufficiently buried or buried between the vertices of the parts 11 and the deep valleys of the convex lenses 11, if the adhesive strength of the ink adsorbent to the contacting slippery surface is low, the phenomenon is easily peeled off under living environment conditions. It can come out.

Therefore, in order to increase the adhesion strength between the plastic surface formed of the smooth convex lens layer 10 and the ink adsorption coating layer 50, the primer coating layer 40 must be further configured.

Therefore, both the primer (adhesive) coating agent 40 and the ink adsorbent 50 should be applied to the surface of the convex lens layer 10 in the liquid state, so that the primer coating process and the ink adsorption coating process through the application process and the drying process, respectively, It must be completed in turn.

However, if the coating process is carried out twice, another problem occurs, and because of the two processes, the coating between the valleys of the convex lenses 11 made of the microscopic micro lenses 11 is made of a liquid in each of the coatings ( 40, 50) will be overlapped sequentially.

Therefore, as shown in FIGS. 3 to 5, the primary process in which the primer coating is performed is important that the primer coating 40 is applied as thin and evenly as a transparent material, and in this process, the radius of curvature of the convex lens 11 A radius of curvature (r2) larger than the value of r1) is formed on the surface of the primer coating layer 40. It is important to make the radius of curvature (r2) close to the radius of curvature (r1) of the convex lens (11). This is preferably made to less than 10 microns using a strong pressure in the coating and drying process according to the coating method.

This process is because it affects the value of the radius of curvature r3 made on the surface of the ink adsorption coating layer 50, which is made again in the next process, the ink adsorbent coating process.

As a result, the focal length is completed by the surface curvature radius r3 of the finally formed ink adsorption layer 50, so that the focal length becomes farther as the radius of curvature r3 increases, and the surface of the ink adsorption coating layer 50 becomes larger. If the radius of curvature is not formed, the effect will not be steric.

Therefore, the smaller the radius of curvature (r3) formed on the surface of the ink adsorption coating layer 50, the closer the focal length becomes, so that the thickness of the sheet is determined by this focal length, thereby preventing waste of raw materials and maintaining a sharp stereoscopic effect. It is.

5 is a partially enlarged cross-sectional view illustrating a process of refraction and condensing incident light to obtain a focal length and a sheet thickness value based on the curvature radius value.

As mentioned above, the general 'three-dimensional plastic sheet 2' which is not for inkjet printing described in FIG. 4 is formed of the convex lens layer 10, the transparent layer 20, the three-dimensional uneven pattern layer 30, or the three-dimensional pattern printing 71. The focal length is the uppermost part of the convex lens layer 10, that is, the lowermost part or the three-dimensional pattern of the transparent layer 20 and the three-dimensional uneven pattern layer 30 which form the intermediate layer of the three-dimensional sheet from the radius of curvature of the convex lens 11. The distance to the point where the incident light 100 to the printing 71 is focused is formed as the focal length t1.

However, in this state, if the coating layers 40 and 50 are applied to the surface of the convex lens layer 10 and viewed from the front of the lens sheet again, the stereoscopic effect can be found to disappear.

This is because the coating layers 40 and 50 are formed on the surface of the convex lens layer 10 with a new refractive index and a radius of curvature, so that a new condensing focal length is created instead of the focal length t1 of the original general 'stereoplastic sheet 2'. This is because the original focal length thickness t1 makes it impossible to maintain the stereo effect.

Therefore, in order to produce the 'three-dimensional sheet 1 for inkjet printing 1' of the present invention as shown in Figures 4 to 5, the thickness of the 'stereoplastic sheet 3' which is a step before forming the coating layers 40 and 50 ( t0) is taken into account and the curvature radius and the refractive index formed on the surface of the coating agent 40 or 50 are adjusted to t3, so that the thickness of the transparent layer 20 is adjusted to t3. It is necessary to produce a three-dimensional sheet (1) for inkjet printing so that the thickness of 't0'.

Accordingly, as shown in FIG. 5, the incident light 103 reaches the ink adsorption coating layer 50 in the air to be refracted 91, and then reaches the primer coating layer 40 to be the secondary refraction 92 and then to the convex lens. The third refraction 93 is made while reaching the medium of the (11) layer, thereby converging the light passing through the refraction paths 91, 92, and 93, that is, the focal length t0.

As a result, the three-dimensional sheet 1 for inkjet printing is formed with refractive indices of different materials constituting the ink adsorbent 50, the primer coating agent 40, and the three-dimensional plastic sheet 3, and each has a different curvature. By the correlation having the radiuses r1, r2, and r3, the focal length t0, that is, the thickness of the sheet in consideration of the refraction path of light is determined.

Therefore, the formula for calculating the thickness t1, that is, the focal length knife, of the conventional general 'stereoplastic sheet 2' by the convex lens described on the left side in the comparative drawing of FIG. 4 is as follows. The difference between the focal length t0 and the thickness due to the 'stereoplastic sheet 3' of the present invention is shown.

Equation 1

F = n1 x r1 / n1-1

(F = focal length, n1 = refractive index of convex lens, r1 = radius of curvature of convex lens)

However, the focal length according to the above formula does not apply in the present invention. As described above, the radius of curvature and refractive index of the coating layers 40 and 50 of the present invention 'three-dimensional sheet 1 for inkjet printing' are not applied.

Therefore, as shown in FIG. 6, the condensing distance varies depending on the coated state. If the surfaces of the coating layers 40 and 50 are flat, the shape of the convex lens generally disappears. Condensing, that is, the focus cannot be achieved, the role as a convex lens is lost.

However, if the refractive index of the primer coating layer 40 in contact with the convex lens 11 is lower than that of the convex lens layer 10, the refractive index of the primer coating layer 40 forms a refractive angle in the convex lens layer 10. The focusing angle 104 and the focal length are formed.

In this case, the focal length can be calculated using the following formula, and the error range is formed according to the condensation error of curvature radius, light transmittance of the material, and other diffuse reflection factors. It can be.

Equation 2

F2 = (n1 x r1 / n1-n2)-t2 / 2

(F2 = focal length of three-dimensional sheet with flat coating layer, n1 = refractive index of convex lens, r1 = radius of curvature of convex lens, n2 = refractive index of primer coating layer, back uneven pattern height = t2)

In addition, as shown in FIG. 7, if the state in which the coating layers 40 and 50 are formed is the same as the pitch arrangement of the convex lens layer 10 and the ink adsorption coating layer 50 having a constant radius of curvature is formed, in this case, ink adsorption Since the radius of curvature of the layer 50 and the index of refraction of the convex lens layer 10 become factors for forming a focal length, the equation for obtaining this is as follows.

In addition, a slight error range is formed depending on the curvature radius, the thickness of the primer coating layer 40 and the ink adsorption coating layer 50, the light transmittance of the material, and other diffuse reflection factors. will be.

Equation 3

F3 = (n1 x r3 / n1-1)-t2 / 2

(F3 = focal length of the three-dimensional sheet with the radius of curvature of the coating layer, r3 = radius of curvature of the unevenness of each ink absorption coating layer, n1 = refractive index of the lens medium, t2 = height of the back uneven pattern)

Therefore, in the present invention, even under the refraction conditions of the light varying depending on the shape of the primer coating layer 40 or (and) the ink adsorption coating layer 50 in contact with the upper surface required by the above formula (2), (3) The thickness of the three-dimensional plastic sheet (3) can be produced in advance.

8 to 16 illustrate another object means for achieving the present invention, which illustrates a method for increasing the color development of an inkjet print.

Conventional inkjet print paper is made of white. The reason is that all photographs or picture prints printed on inkjet print paper have color, which is a natural reason that the brightness and saturation values of colors are determined based on a white background.

 However, the present invention focuses on the three-dimensional sheet 1 for inkjet printing to be seen in three dimensions, which is manufactured using the three-dimensional plastic sheet 3 of transparent material, and thus is printed on the surface of the transparent inkjet printing sheet. The color of the printed product is only a structure in which the surrounding conditions, in particular, the rear object (transmitted light or reflected light) are projected and overlapped.

 Therefore, the result of losing the original color of the printed matter and inhibiting the color expression can be solved by the following method as a means to solve this problem.

8 is a diagram illustrating an embodiment for solving the above problem.

In the case of the three-dimensional plastic sheet 3 forming the surface of the micro lens 11, the three-dimensional effect is maintained as a transparent lens sheet. Therefore, the surface of the three-dimensional sheet 1 for inkjet printing is adjacent to the back light or the rear surface. The color of the object is projected to prevent the phenomenon to be reflected as much as possible and the ink-jet printing color to be printed on the front surface of the 'three-dimensional sheet for inkjet printing (1) of the present invention should appear naturally.

In addition, the incident light 103 on the front surface of the three-dimensional sheet 1 for inkjet printing allows the three-dimensional printing 71 or the three-dimensional uneven pattern layer 30 formed on the back of the three-dimensional sheet to be viewed so that the three-dimensional phenomenon does not disappear. It is important to be.

Therefore, the present invention for solving this problem is to use the master batch (MASTER BATCH) mixed with less than about 10% of the transparent plastic main material (resin) in the extrusion process to produce a 'three-dimensional plastic sheet (3)', the color of the sheet made This can be solved by manufacturing a translucent three-dimensional plastic sheet 60 capable of simultaneously displaying a three-dimensional effect while maintaining the translucent white or translucent specific color.

The problem to be noted here is that the viewer viewing from the front of the three-dimensional sheet for inkjet printing (1) through the convex lens layer 10 and the transparent layer 20 forming the three-dimensional plastic sheet (3), the rear three-dimensional uneven pattern The convex lens layer 10 and the transparent layer 20 of the 'stereoplastic sheet 3' are three-dimensionally felt because the light (incident light) reflected or totally reflected up to the layer 30 or the three-dimensional pattern printing 71 is sensed in three dimensions. It is a problem for the three-dimensional effect is reduced by the diffuse reflection or lack of light transmission of the incident light 103 passing through.

In other words, the 'three-dimensional plastic sheet 3' appears white because the particles of the MASTER BATCH contained in the transparent 'three-dimensional plastic sheet 3' are visually seen. This reflecting material contains a lot of reflecting material, the light 103 passing through the convex lens 11 of the three-dimensional plastic sheet (3) through the transparent layer 20, the back three-dimensional uneven pattern layer 30 or three-dimensional Even before reaching the pattern printing 71, all the light is reflected by the white material particles so that the incident light does not reach the three-dimensional uneven pattern layer 30 or the three-dimensional pattern printing 71, and the light expressed by reflection or total reflection is visually observed. It becomes impossible to see.

Therefore, the present invention is not intended that the 'three-dimensional plastic sheet 3' is only visible in white, so that the three-dimensional uneven pattern layer 30 or the three-dimensional pattern printing 71 formed on the back of the sheet is three-dimensionally visible to see Transmittance of 50% or more, the translucent three-dimensional plastic sheet 60 that does not inhibit the condensation according to the refractive index is to use a white or specific color masterbatch that can come out to be adjusted according to the application.

Therefore, as shown in FIG. 8, the ball roll lens layer 10 constituting the three-dimensional plastic sheet 3 is made of a semi-spherical convex lens consisting of a 90 degree cross array or a 60 degree cross array at a constant pitch interval, or half Cylindrical lenses are formed in a vertical or horizontal arrangement.

As described in FIG. 4, the focal length is not formed by the focal length t1 of the general 'stereoplastic sheet 2', and the thickness of the 'stereoplastic sheet 3' having the thickness of the transparent layer 20 't3'. It is formed of 't0'.

In addition, 'three-dimensional plastic sheet (3)' is produced by extrusion or injection method by mixing the master batch in less than about 10% of the transparent plastic raw material, the mixing ratio of the resin is the light of the 'three-dimensional sheet for inkjet printing (1)' It is mix | blended so that a transmittance | permeability may come out more than 50%.

Accordingly, the primer coating 40 is applied by thin coating and dried so that the radius of curvature 'r2' is formed on the surface of the convex lens layer 10 of the thus-formed 'stereoplastic sheet 3'. By coating and drying the curvature radius of each of the uneven adsorption coating layer 50 to be 'r3', the 'three-dimensional sheet for inkjet printing 1' of the present invention can be produced.

9 to 10 are semi-transparent layers of the three-dimensional plastic sheet 3 constituting the convex lens layer 10, the transparent layer 20, and the three-dimensional uneven pattern layer 30. It is a figure which illustrates that it consists of the white plastic 60. As shown in FIG.

The method of manufacturing the 'stereoplastic sheet 3' of the present invention is made by a hot press method, an extrusion method, an injection method, etc., but the extrusion method is efficient as a method for mass production.

Typically, the sheet extrusion method is divided into a single layer extrusion method, a two-layer extrusion method, a multi-layer (more than 3 layer) extrusion method, etc. will vary depending on the purpose.

Therefore, in manufacturing the 'stereoplastic sheet 3' of the present invention, the white translucent effect of the sheet may be increased, and in order to further enhance the three-dimensional or glossiness of the three-dimensional sheet, a multilayer method may be selected to increase the effect.

9 to 10 need to compare the paths of light compared to FIG. 8.

That is, when the 'stereoplastic sheet 3' is manufactured in a single layer method as in the method of FIG. 8, the ink is sequentially adsorbed when the viewer views the front of the three-dimensional sheet 1 for inkjet printing. The incident light 103 passing through the coating layer 50, the primer coating layer 40, the convex lens layer 10, and the transparent layer 20 is reflected or totally reflected again by the three-dimensional uneven pattern layer 30, and then the transparent layer 20. Since the particles of the masterbatch generate diffuse reflections that hinder the steric effect while the convex lens layer 10, the primer coating layer 40, and the ink adsorption coating layer 50 are visible to the naked eye, the master of the light transmission path It is possible to select a method of reducing the path spacing of the plastic layer 60 diffusely reflected by the arrangement.

That is, as shown in the figure of FIG. 9, as in the case of the two-layer structure of the three-dimensional plastic sheet (3), one layer of the plastic layer is composed of a plastic material 60 mixed with the white material, the remaining 1 By making the layer of layers only composed of the transparent plastic 61 raw material, the result of reducing the diffuse reflection section of the light observation path is much better.

Similarly, in the case of manufacturing a 'stereoplastic sheet 3' having a multilayer (three or more) structure as shown in FIG. 10, one layer of the multilayer structure has a plastic layer 60 mixed with white reflective material. The rest is composed of a layer of transparent plastic 61, so that the relatively multilayer structure has a thinner section (thickness) that causes diffuse reflection can be used in a more effective way.

FIG. 11 is a view illustrating another method of making the 'three-dimensional sheet 1 for inkjet printing' appear white translucent as another embodiment of the present invention.

As shown in FIG. 11, the white or semi-transparent white or specific color ink adsorption coating layer 51 is formed by mixing a white reflective material so as to appear translucent.

It can be seen that the primer coating layer 40, the 'three-dimensional plastic sheet (3)' is sequentially stacked on the bottom, such a configuration also when the viewer observes through the 'Three-dimensional sheet for inkjet printing (1)' Since the three-dimensional uneven pattern layer 30 or three-dimensional pattern printing 71 should be seen through at a transmittance of 50% or more (up to 90%), in this case, it is necessary to make the three-dimensional plastic sheet 3 transparent. desirable.

Therefore, the translucent white or the specific color of the ink absorption coating layer 51 is to be seen to be transmitted together, so that the translucent ink adsorption coating layer 51 in the overall thickness of the inkjet printing three-dimensional sheet (1) is relatively The thinner the less reflection factor, the more favorable the manufacturing process is while maintaining a clear three-dimensional effect.

The white material is used by mixing alumina or white pigment, etc., which are white in the ink adsorbent, but the mixed material is not limited in the present invention.

12 is a view illustrating a three-dimensional sheet dedicated for UV inkjet printing as another embodiment of the 'three-dimensional sheet 1 for inkjet printing'.

In general, UV inkjet prints tend to adsorb ink on any material surface better than aqueous inkjet prints or solvent inkjet prints. Therefore, ink is absorbed on surfaces such as wood, metal, glass, and plastic as well as paper and cloth. Printing is possible without the need for coating.

However, when the user uses a flexible plastic sheet, the surface printing adhesive strength is not perfect, so there is a problem that the durability is somewhat lowered to secure the reliability of the product.

Therefore, as shown in FIG. 12, only the primer coating layer 40 is formed on the surface of the 'stereoplastic sheet 3' to increase the ink adhesion of the UV inkjet print.

In addition, unlike the conventional water-based or solvent printing method, the UV inkjet print is capable of white UV ink print (81), so that the color UV ink print (72) is colored even when the 'three-dimensional plastic sheet (3)' is not made of translucent white. Printing is possible without being greatly affected by the color development, but due to the nature of the white ink is easily solidified in the liquid, the expiration date to be kept in the printer is too short to use as a user's preferred general printing.

Therefore, the three-dimensional sheet 1 for UV inkjet printing used in the present invention may be made of the 'stereoplastic sheet 3' transparently, but the 'stereoplastic sheet 3' as in the above-described manner may be described with reference to FIGS. It is desirable to make it look white and translucent as in the process.

In addition, the curvature radius and the refractive index of the primer coating layer 40 on the surface of the three-dimensional plastic sheet (3) to be lowered to reduce the focal length of the three-dimensional sheet (1) for UV inkjet printing or the thickness of the 'three-dimensional plastic sheet (3)' It is to be calculated by using the formula in advance.

Equation 4

F4 = (n1 x r2 / n1-1)-t2 / 2

(F4 = focal length of the three-dimensional sheet with the radius of curvature of the coating layer, r2 = radius of curvature of the unevenness of each primer coating layer, n1 = refractive index of the lens medium, t2 = height of the back uneven pattern)

13 to 16 are partial enlarged cross-sectional views illustrating another exemplary embodiment of the present invention, as shown in FIGS. 8 to 12, to make the 'stereoplastic sheet 3' white translucent or semitransparent to the ink adsorption coating layer 50. Rather than making it visible, the white ink 80 layer and the color ink 70 layer are formed on the surface of the solid concave-convex pattern layer 30 formed at the lower end of the three-dimensional plastic sheet 3, thereby allowing inkjet printing by white background. 8 to 12 in the three-dimensional sheet for inkjet printing (1) produced in this manner as a view showing that the three-dimensional appearance by the color difference of the ink or the difference in the filled shade of the ink while maintaining the color development degree of Unlike the method of construction of the adhesive has an advantage that can be further configured to the adhesive or adhesive.

13 is stacked in the order of the ink adsorption coating layer 50, the primer coating layer 40, the three-dimensional plastic sheet (3), the white ink 80 layer, the color ink 71 layer from the top side as shown in the figure It is a structure that there is.

As described above, it is most preferable that the inkjet media is white in order to express the printing color of the inkjet print most when the inkjet print is performed.

However, 'three-dimensional plastic sheet (3)' has the advantage that the three-dimensional uneven pattern layer 30, which appears three-dimensionally as a transparent material, is gloriously expressed by light due to total reflection, but is limited in the color expression color development of inkjet print as a transparent material. There are drawbacks to this.

Therefore, in the method of FIG. 13, the white unevenness 31 constituting the three-dimensional unevenness pattern layer 30 and the white ink 80 are filled in the surface of each unevenness 31 by printing or gravure filling between the valleys. Ink concentration color difference caused by the difference in ink thickness or fine shade difference generated on the surface of each unevenness 31 is generated, which is the ink adsorption coating layer 50, the primer coating layer 40 and the convex lens layer 10 Because of the convex lens effect of), it is enlarged to have a bright white color and to express a three-dimensional effect.

However, this method can improve the color expression of the inkjet print perfectly, but it should give up the brilliant expression of light by total reflection. Therefore, this is an alternative that the user can select and utilize according to the purpose of use.

In addition, the color ink 71 may be additionally printed or painted on the surface of the white ink 80 layer, which is white due to the difference in the thickness of the ink filled on the surface of each unevenness 31. Relatively thin printed irregularities (31) by using the color difference that is reflected at the vertex portion to improve the three-dimensional and design expression.

FIG. 14 is made by changing the process sequence of the ink layers 71 and 80 printed or filled in the concave-convex pattern layer 30 by the applied method of FIG. 13.

Color ink 71 is first printed on the surface of the three-dimensional uneven pattern layer 30 constituting the three-dimensional plastic sheet (3), but the color ink (71) around the vertices of each unevenness (31) by the printing press pressure Is thinned and then the white ink 80 is produced by printing or filling the entire surface of the concave-convex pattern layer 30 relatively thick.

This causes the lightly colored color ink 71 to appear more clearly three-dimensionally between the white ink 80, so that if the color brightness or saturation of the ink becomes too dark, it will also affect the color development color development of the inkjet print that will be printed later by the user. It is desirable to have as bright a color as possible.

15 is a three-dimensional plastic sheet (3) used in the three-dimensional sheet (1) for inkjet printing of the present invention is composed of a convex lens layer 10, a transparent thickness layer 20 and a printing layer 70 It is characterized by being formed.

This configuration is such that the three-dimensional pattern printing 73 and the white ink 80 are composed of the printing layer 70 instead of the three-dimensional uneven pattern layer 30 so that the 'three-dimensional sheet for inkjet printing 1' can be seen in three dimensions. Instead of the gloss that the three-dimensional concave-convex pattern layer 30 expresses, the three-dimensional concave-convex pattern layer 30 is expressed by printing a pattern of a more precise and various design to make it appear three-dimensional.

However, in this case, since the height t2 of the three-dimensional uneven pattern layer 30 is not formed, it is an error range, but the focal length t0 is based on the focal length t0 based on the following formula. It is preferable to make the adjustment slightly more.

Equation 5

F5 = n1 x r3 / n1-1

(F5 = focal length of the three-dimensional sheet having the radius of curvature of the coating layer, r3 = radius of curvature of the unevenness of each ink absorption coating layer, n1 = refractive index of the lens medium)

16 is applied to the surface of the three-dimensional uneven pattern layer 30 by the metal deposition or reflective ink 120 in the 'stereoplastic sheet 3' of the present invention as shown in Figure 13 to 15 The figure illustrates a method of enabling a texture that is difficult to express.

Since the individual concave-convex (31) constituting the three-dimensional sheet for inkjet printing (1) is enlarged to appear three-dimensional, when applied to the surface of the three-dimensional concave-convex pattern layer 30 by metal deposition or reflective ink 120 As the unevenness (31) looks like a sculpture made of metal, the unevenness (31) is clearly highlighted, and when the user prints with inkjet free, it is realistic as a metal image of the desired color along with the print color. It is to enable decorative rendering.

This is not a print on a thin plastic surface, but a way of expressing it with a thick, heavy metal feel.

In addition, the 'three-dimensional sheet for inkjet printing (1)' of FIGS. 13 to 16 manufactured as described above is different from the structural features and three-dimensional embodiment representations made in FIGS. 8 to 12 as described above. There is an advantage that can be configured further.

The reason is that the three-dimensional sheet 1 for inkjet printing made in the method of FIGS. 8 to 12 is a three-dimensional appearance by perspective observation by total reflection of the three-dimensional uneven pattern layer 30, and thus the uneven pattern layer 30 When the pressure-sensitive adhesive is filled between the bones of), the uneven patterns 31 observed by the observer in three dimensions are diffusely reflected or directly transmitted from the incident light 103 to disappear.

That is, since the adhesive is covered between the surface or the valley totally reflected in each uneven pattern 31, the total reflection is not made because the refraction of the light is not made, that is, the glorious three-dimensional feeling disappears.

On the other hand, the method of FIGS. 13 to 16 represents a three-dimensional effect by the white ink 80, the color ink 71, or the deposition ink 130, and the reflective ink, and the white ink 80 or the deposition ink and the reflective ink 130 are already present. Since the surface covers the back surface of the three-dimensional uneven pattern layer 30 or the three-dimensional plastic sheet 3, even if an adhesive is applied to the back surface of the three-dimensional sheet for inkjet printing (1), the three-dimensional effect is naturally affected. Without giving, the user has the advantage of being able to attach to any object after completing the inkjet print, depending on the application.

1. Three-dimensional printing sheet for inkjet printing
2. The conventional general low three-dimensional printing sheet
3. Three-dimensional plastic sheet with adjustable focal length
10. Convex lens layer
11. Single convex lens
20. Transparent thickness layer
30. Uneven pattern layer
31. Individual irregularities
40. Primer coating layer
50. Ink adsorption coating layer
51. Ink adsorption coating layer mixed with white or specific color
60. Translucent plastic with mixed masterbatch
61. Transparent plastic layer
70. Printing Layer
71. Color Ink
72. UV color ink
73. Color Pattern Printing
80. White Ink
81. White UV Ink
91. Primary refraction point for incident light
92. Secondary point of refraction for incident light
92. Third Refractive Point for Incident Light
100. Condensing direction according to incident light of a conventional general three-dimensional sheet
101. Primary refraction direction for incident light
102. Secondary refraction direction for incident light
103. Condensing direction according to incident light of three-dimensional printing sheet for inkjet printing
104. Condensing Forming Angle
120. Metal Deposition or Reflective Ink
130. Adhesive or adhesive
d. Height of convex layer
r1. Radius of curvature of the convex lens
r2. Single curvature radius of primer coating layer
r3. Individual curvature radius of ink adsorption coating layer
t0. Focal length of stereo print sheet for inkjet printing
t1. Focal Length of Conventional Extrusion Sheets
t2. Height of uneven pattern layer
t3. Clear layer height of three-dimensional plastic sheet with adjustable focal length

Claims (7)

Ink absorption coating layer 50; Primer coating layer 40; Convex lens layer 10; Transparent thickness layer 20; As the semi-transparent three-dimensional sheet is formed of a sheet by forming the uneven pattern layer 30 in sequence,
The ink adsorption coating layer 50 is an inkjet dedicated ink adsorption coating layer, and the primer coating layer 40 is a layer for adhering the ink adsorption coating layer 50 and the convex lens layer 10 and has a thickness of 10 microns (10/1000 mm). Hereinafter, the transparent thickness layer 20 is formed to have a thickness in which the focus of incident light passing through the ink absorption coating layer 50, the primer coating layer 40, and the convex lens 11 is formed on the uneven pattern layer 30. , The uneven pattern layer 30 is a three-dimensional sheet for inkjet printing, characterized in that the interlaced original 73 is printed on the outer surface of the transparent thickness layer in three dimensions. In claim 1,
The primer coating layer 40 and the ink adsorption coating layer 50 are sequentially coated on the surface of the convex lens layer 10 has a curvature radius larger than the curvature radius of the convex lens 11, characterized in that for three-dimensional inkjet printing Sheet In claim 1,
The primer coating layer 40 is coated on the surface of the convex lens layer 10 has a radius of curvature larger than the radius of curvature of the convex lens 11, the ink adsorption coating layer 50 has a flat surface is convex Three-dimensional sheet for inkjet printing, characterized in that formed with a lower refractive index than the refractive index of the lens layer 10 3. The method according to claim 2 or 3,
Three-dimensional sheet for inkjet printing, characterized in that the light transmittance of any one of the transparent thickness layer 20, the ink adsorption coating layer 50, the primer coating layer 40 is 50% to 90% translucent. 5. The method of claim 4,
When the transparent thickness layer 20 is translucent, the transparent thickness layer is formed into multiple layers, and only one layer of these layers is translucent, and the remaining layers are transparent to minimize the area where diffuse reflection occurs in the light path. Three-dimensional sheet for inkjet printing, characterized in that 5. The method of claim 4,
The concave-convex pattern layer 30 is a three-dimensional sheet for inkjet printing, characterized in that the white ink 80 is additionally applied to the surface (including printing, filling, coating, etc.). 5. The method of claim 4,
The lens of the convex lens layer 10 is a three-dimensional sheet for inkjet printing, characterized in that the semi-cylindrical lenticular lens or hemispherical convex lens.

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