CN118112699A

CN118112699A - Imaging film

Info

Publication number: CN118112699A
Application number: CN202211504934.XA
Authority: CN
Inventors: 周菲; 洪莘
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2024-05-31

Abstract

The invention discloses an imaging film which comprises a focusing layer and a picture-text layer. The focusing layer comprises a plurality of microstructures, the image-text layer comprises a plurality of micro patterns, and the micro patterns are matched with the micro structures to form an image with an amplifying effect. The image-text layer comprises a colored curing adhesive carrier and a micro pattern which is formed by embossing the colored curing adhesive and is protruded or recessed in the carrier. The micro-pattern is formed by imprinting the colored curing glue, and the pattern-text layer is patterned by pulling the color difference through different thicknesses, so that high-resolution images are formed without nano printing.

Description

Imaging film

Technical Field

The invention relates to the technical field of optical films, in particular to an imaging film.

Background

Graphics of conventional imaging films are typically formed using inks through printing or nano-printing processes. The patterns formed by digital printing can have various colors, but due to the lower resolution, only patterns with more than 10um can be printed, and some patterns with fine features cannot be made. If the imaging film to be manufactured can obtain a pattern with fine details, the groove structure needs to be stamped by nano-imprinting, and then nano-ink is filled into the groove by printing (nano-printing for short) to obtain a micro-pattern with nano-scale size, so that the high-resolution imaging effect can be realized. The filling amount of the ink in the nano printing process is limited by the depth and the width of the groove, so that nano printing is easy to be incomplete, for example, the ink in the center of the groove is extremely small, the formed image is hollow and exposed, and the imaging quality of the image is improved.

Disclosure of Invention

Based on this, it is necessary to provide an imaging film to solve at least one technical problem described above.

The technical scheme of the invention is as follows:

An imaging film, comprising:

a focusing layer comprising a plurality of microstructures;

The image-text layer comprises a plurality of micro patterns, and the micro patterns are matched with the micro structures to form an image with an amplifying effect;

the image-text layer comprises a colored curing adhesive carrier and a bulge or a micro pattern which is formed by imprinting the colored curing adhesive and is recessed in the carrier.

In one embodiment, the thickness of the carrier is D, and the thickness of the micro pattern is D, and the absolute value of D-D is more than or equal to 2 mu m.

In one embodiment, the thickness of the carrier is D, and the thickness of the micropattern is D, then |d-d| > 3 μm.

In one embodiment, the micropattern is a recessed structure wherein D > 4 μm and D < 1 μm.

In one embodiment, the colored cured glue is a UV colored glue.

In one embodiment, the UV color paste contains color ink particles with particle diameters less than 100 nm.

In one embodiment, the colored ink particles are present in an amount of 8% to 13%.

In one embodiment, a plurality of the microstructures are arranged periodically, and a plurality of the micropatterns are arranged periodically; or a plurality of the microstructures are randomly distributed, and a plurality of the micropatterns are randomly distributed.

In one embodiment, the microstructures are arranged periodically, and the variable period arrangement or the arrangement direction of the micro patterns is changed.

In one embodiment, the imaging film further includes a substrate layer, the focusing layer is disposed on one side of the substrate layer, and the image-text layer is disposed on the other side of the substrate layer.

The invention has the beneficial effects that: the micro-pattern is formed by imprinting the colored curing glue, and the pattern-text layer is patterned by pulling the color difference through different thicknesses, so that high-resolution images are formed without nano printing.

Drawings

FIG. 1 is a schematic plan view of an imaging film of the present invention;

FIG. 2 is a schematic structural view of an imaging film of the present invention;

FIG. 3 is a schematic view of another embodiment of an imaging film of the present invention;

FIG. 4 is a schematic plan view of another embodiment of an imaging film of the present invention;

fig. 5 is a schematic structural view of another embodiment of the imaging film of the present invention.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In one embodiment, the thickness of the carrier is D and the thickness of the micropattern is D, then |D-d| is greater than or equal to 2 μm. The micro pattern is formed on the carrier, and the thickness D of the carrier refers to the thickness except the area where the micro pattern is located, and the thickness D of the micro pattern refers to the thickness of the protrusion or the depression. When the micro pattern is in a convex structure, the thickness of the micro pattern is larger than that of the carrier in other areas, namely D-D is more than or equal to 2 mu m; when the micro pattern is in a concave structure, the thickness of the micro pattern is smaller than that of the carrier in other areas, namely D-D is more than or equal to 2 mu m, and the difference of the thickness of the two is used for pulling the difference of colors to obtain the visualization of the micro pattern, so that the patterning is realized. Therefore, the high-resolution image-text layer can be manufactured by only nanoimprint of the colored curing adhesive, the process is simple, the resolution is high, the micro-pattern structure is stable, and the high-resolution and high-quality image is formed.

In one embodiment, the thickness of the carrier is D and the thickness of the micropattern is D, then |D-d| > 3 μm. The formed image is clearer, and the contrast ratio of the image is improved.

In one embodiment, the micropattern is a recessed structure, preferably wherein D > 4 μm and D < 1 μm, forming a high resolution and high contrast image.

In one embodiment, the micropattern is a raised structure, preferably wherein D < 1 μm and D > 4 μm, forming a high resolution and high contrast image.

In one embodiment, the colored cured glue is a UV colored glue. The micro-pattern is obtained by utilizing UV color glue to carry out nano-imprinting and ultraviolet curing, the process is simple, the micro-pattern structure is stable, and the high-resolution and high-quality image is obtained. Preferably, the UV color paste contains color ink particles with particle diameters smaller than 100nm, so that the imaging film cannot generate macroscopic particle points, and therefore the color is more uniform and the visual effect is better. Further, the content of the colored ink particles is 8% -13%, such as 8%, 10%, 13%, etc., so that the color and imaging quality are ensured.

In one embodiment, the plurality of microstructures are arranged periodically and the plurality of micropatterns are arranged periodically to form one or more images. The image formed is suspended or submerged according to the periodic arrangement of the microstructure and micropattern. The microstructure and the micropattern are directly formed through nano imprinting, so that the structure quality is ensured, and the high-resolution and high-quality image is obtained. By setting the thicknesses of the micro pattern and the carrier, the contrast of the micro pattern is controlled, so that a clearer image can be obtained. The imaging quality is improved, and the anti-counterfeiting effect and the decorative effect are better.

In one embodiment, the plurality of microstructures are randomly distributed, the plurality of micropatterns are randomly distributed, and only one image is formed, and the only image formed is floating or sinking according to the random arrangement of the microstructures and micropatterns. The microstructure and the micropattern are directly formed through nano imprinting, so that the structure quality is ensured, and the high-resolution and high-quality image is obtained. By setting the thicknesses of the micro pattern and the carrier, the contrast of the micro pattern is controlled, so that a clearer image can be obtained. The imaging quality is improved, and the anti-counterfeiting effect and the decorative effect are better.

In one embodiment, the plurality of microstructures are arranged periodically, and the plurality of micropatterns are arranged periodically or with variation along the arrangement direction. The arrangement period of the micro patterns has variation, and an image with variation is obtained. For example, the period is set for gradual change, so that the obtained image has higher quality gradual change effect. In another embodiment, the plurality of micro patterns have variation along the arrangement direction, such as thickness variation of the micro patterns, so as to form a color variation image; such as a change in the size of the micropattern, forming an image of the change in size, etc. And the micro-pattern obtained by micro-nano imprinting has stable shape, and ensures the formation of a fine structure.

In one embodiment, the imaging film further comprises a substrate layer, the focusing layer is disposed on one side of the substrate layer, and the image-text layer is disposed on the other side of the substrate layer. The imaging film is formed by providing a substrate layer such as PET, coating UV color-free glue on one side of the PET, embossing and solidifying to form a focusing layer, and coating UV color glue on the other side of the PET, embossing and solidifying to form a picture-text layer. In another embodiment, a reflective layer is coated on the focusing layer, the reflective layer is positioned on a side of the focusing layer away from the substrate layer and covers the microstructures to obtain a reflective imaging film.

The imaging film of the present invention is described below by way of example with reference to the drawings.

Referring to fig. 1 and 2, the present invention discloses an imaging film 100, which includes a focusing layer 1 and a graphics layer 2. The focusing layer 1 comprises a plurality of microstructures 11, the image-text layer 2 comprises a plurality of micro patterns 21, and the micro patterns 11 are matched with the micro patterns 21 to form an image with a magnifying effect. The image-text layer 2 comprises a colored curing adhesive carrier 22 and a micro pattern 21 which is formed by imprinting the colored curing adhesive and is recessed in the carrier 22. The thickness of carrier 22 is D and the thickness of micropattern 21 is D. In this embodiment, D > 4 μm, e.g., d=4.5 μm,6 μm, etc.; d < 1 μm, e.g., d=0.8 μm,0.6 μm, etc. D-D > 3 μm. The thickness difference between the carrier 22 and the micro pattern 21 will pull the color difference to obtain the visualization of the micro pattern 21, thereby realizing the patterning of the graphic layer 2. The high-resolution image-text layer 2 can be manufactured by only nanoimprint of the colored curing adhesive, and the method has the advantages of simple process, high resolution, stable micro-pattern structure, high-resolution and high-quality image formation and high contrast.

In the embodiment, the colored curing adhesive is a UV color adhesive, the UV color adhesive contains color ink particles with isolation diameters smaller than 100nm, the content of the color ink particles is 10%, and the color is uniform and has no particle feel. In other embodiments, the colored cured glue is a heat cured glue.

With continued reference to fig. 1 and 2, the plurality of microstructures 11 of the imaging film 100 are arranged in a periodic array, the plurality of micro patterns 21 are arranged in a periodic array, the period of the microstructures 11 is different from the period of the micro patterns 21, and the microstructures 11 and the micro patterns 21 are arranged in a one-to-one correspondence manner, so as to form a plurality of enlarged images in the array arrangement. In other implementations, there is a change in the period of the microstructure 11, such as a periodic fade setting, to form an enlarged image with a fade effect; or the microstructure 11 may be varied over a period, such as a height gradient arrangement, to form an enlarged image with a gradual change in color.

Referring to FIG. 3, another imaging film 101 is disclosed in the present application, and compared with the imaging film 100, the micro pattern 21 of the imaging film 101 in the present embodiment has a convex structure, the thickness D of the carrier 22 is smaller than the thickness D of the micro pattern 21, and D-D is larger than or equal to 2 μm. For example, d=1 μm, d=3 μm; d=1.5 μm, d=5 μm. The thickness difference between the carrier 22 of the image-text layer 2 and the micro pattern 21 can realize the imaging of the image-text layer 2, and the micro pattern 21 is darker than the carrier 22, so as to obtain a darker image. The structures of the present application that are the same as the named structures are given the same reference numerals for convenience of comparison and understanding, as follows.

Referring to fig. 4, another imaging film 102 is disclosed, and compared with the imaging film 100, the imaging film 102 in this embodiment further includes a substrate layer 3. The substrate layer 3 comprises a first side 31 and a second side 32 arranged opposite each other. The focusing layer 1 is disposed on the first side 31, and the image-text layer 2 is disposed on the second side 32. Preferably, the substrate layer 3 is a PET layer that is stable in performance and easy to mold the microstructures 11 and micropatterns 21. In one imaging mode, a UV leuco gel is coated on the first side 31, and the UV leuco gel is stamped and cured to form the microstructure 11; a UV color paste is coated on the second side 32, and the UV color paste is embossed and cured to form the micropattern 21. In other embodiments, the substrate layer 3 may be a single layer or a composite layer such as a PC layer, PI layer, PMMA layer, glass layer, or the like.

Referring to fig. 5, another imaging film 103 is disclosed in the present invention, and compared with the imaging film 100, the microstructures 11 of the imaging film 103 in the present embodiment are randomly distributed, i.e. there is no symmetry axis in the distribution. Accordingly, the micro patterns 21 (not shown in fig. 3) are also randomly distributed, and the micro structures 11 and the micro patterns 21 are disposed in a one-to-one correspondence, so that the imaging film 103 can form only one floating image. In other embodiments, the micro-patterns 21 may be randomly distributed while having a change in the size of the gradation setting, etc., so that an image having an effect of gradation, etc. may be formed.

The foregoing embodiments of the invention are explained in detail with reference to the accompanying drawings so that the above objects, features and advantages of the invention can be more clearly understood. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described above and similar modifications may be made by those skilled in the art without departing from the spirit of the invention, and it is therefore not to be limited to the specific embodiments disclosed above. In addition, the technical features of the above-described embodiments may be combined arbitrarily, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description of the present specification.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An imaging film, comprising:

a focusing layer comprising a plurality of microstructures;

2. The imaging film of claim 1, wherein the thickness of the carrier is D and the thickness of the micropattern is D, |d-d|gtoreq 2 μm.

3. The imaging film of claim 1, wherein the carrier has a thickness D and the micropattern has a thickness D, |d-d| > 3 μm.

4. The imaged film of claim 3, wherein the micropattern is a recessed structure wherein D > 4 μm and D < 1 μm.

5. The imaged film of claim 1, wherein the colored cured glue is a UV colored glue.

6. The imaged film of claim 5, wherein the UV color paste comprises color ink particles having a particle diameter of less than 100 nm.

7. The imaged film of claim 6, wherein the colored ink particles comprise 8% to 13%.

8. The imaged film of claim 1, wherein a plurality of the microstructures are arranged periodically and a plurality of the micropatterns are arranged periodically; or a plurality of the microstructures are randomly distributed, and a plurality of the micropatterns are randomly distributed.

9. The imaged film of claim 1, wherein a plurality of the microstructures are arranged periodically and wherein there is a variation in the periodic arrangement or along the direction of arrangement of the plurality of the micropatterns.

10. The imaging film of claim 1, further comprising a substrate layer, wherein the focusing layer is disposed on one side of the substrate layer and the graphics layer is disposed on the other side of the substrate layer.