CN114055974A - Photopolymer film and application thereof, photopolymer printing stock and preparation method - Google Patents
Photopolymer film and application thereof, photopolymer printing stock and preparation method Download PDFInfo
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- CN114055974A CN114055974A CN202111364647.9A CN202111364647A CN114055974A CN 114055974 A CN114055974 A CN 114055974A CN 202111364647 A CN202111364647 A CN 202111364647A CN 114055974 A CN114055974 A CN 114055974A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/06—Veined printings; Fluorescent printings; Stereoscopic images; Imitated patterns, e.g. tissues, textiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
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Abstract
The invention discloses a photopolymer film and application thereof, a photopolymer printing stock and a preparation method thereof, wherein the photopolymer printing stock comprises a base film, a protective film and a photopolymer information layer; the photopolymer information layer is laid on the base film, and the protective film covers the photopolymer information layer; the thickness of the photopolymer information layer is 3 to 25 μm. The thickness of the photopolymer information layer is 3-25 mu m, the reflection brightness is high, light rays are not easily absorbed by the photopolymer information layer, the diffraction efficiency of the photopolymer information layer is high, the brightness is high, the 3D pattern is bright and clear, and the 3D effect is very obvious. The three-dimensional holographic display method can be widely applied to various printing stocks, and very obvious 3D holographic display effect is realized.
Description
Technical Field
The invention relates to the technical field of a photopolymer film, in particular to a photopolymer film, application thereof, a photopolymer printing stock and a preparation method thereof.
Background
With the wide application and the increased effect of the photoetching machine, the patterns of the laser film layer are more and more colorful. The hot stamping film is a perfect combination of a laser product and printing stocks such as paper, film and glass which are very popular and mature at the present stage. The section of the hot stamping film is clear, and the surface of the printed material after transfer printing has almost no concave-convex feeling, which is related to the performance and thickness of the laser film layer.
The laser film layer is of a surface relief structure, the thickness of the laser film layer is about 1-2 microns, the laser film layer can be produced by die pressing through carving a nickel plate, and the material is fragile. The laser film layer is of a surface relief structure, and the lines of convex-concave grooves on the surface are about 1000 lines/mm; the grooves are nearly vertically upward and cannot be too deep and too thin for embossing production requirements. This determines that the laser film layer can express comply with with pattern in white light and has much color, but the 3D stereoscopic effect is not obvious.
Disclosure of Invention
The invention aims to provide various photopolymer films and applications thereof, a photopolymer printing stock and a preparation method thereof, and the photopolymer printing stock has an obvious 3D (three-dimensional) effect and can be widely applied to various printing stocks to realize a 3D holographic display effect.
The invention discloses a photopolymer film, which comprises a base film, a protective film and a photopolymer information layer; the photopolymer information layer is laid on the base film, and the protective film covers the photopolymer information layer; the thickness of the photopolymer information layer is 3 to 25 μm.
Optionally, the thickness of the photopolymer information layer is 6 to 9 μm.
Optionally, the resolution of the photopolymer information layer is 6000 lines/mm or more.
The invention also discloses a preparation method of the photopolymer printing stock, which comprises the following steps:
step 1: pre-die cutting the photopolymer film, cutting the photopolymer information layer, without cutting the protective film;
step 2: curing the information area of the die-cut photopolymer information layer to the substrate, and stripping the protective film and the non-information area of the photopolymer information layer.
Optionally, step 1 further comprises:
the photopolymer film is pre-die cut, the base film is cut, and the base film is peeled.
Optionally, step 2 further comprises:
printing or spraying UV glue on the printing position of a printing stock;
the information areas of the photopolymer information layer are bonded to the substrate locations of the printing material and UV cured.
Optionally, step 1 is preceded by:
stripping the base film;
and coating an isolation protective layer on the photopolymer information layer, and coating hot melt adhesive on the isolation protective layer.
Optionally, step 2 further comprises:
and adhering the photopolymer information layer on the printing stock, heating the printing position of the printing stock, and solidifying the information area of the photopolymer information layer on the printing position of the printing stock.
The invention also discloses an application of the photopolymer film on a printing stock.
The invention also discloses a photopolymer printing stock, which comprises a printing stock and a photopolymer information layer; the photopolymer information layer is solidified on a printing stock, and the thickness of the photopolymer is 3-25 mu m.
The thickness of the photopolymer information layer is 3-25 mu m, the reflection brightness is high, light rays are not easily absorbed by the photopolymer information layer, the diffraction efficiency of the photopolymer information layer is high, the brightness is high, the 3D pattern is bright and clear, and the 3D effect is very obvious. The three-dimensional holographic display method can be widely applied to various printing stocks to achieve a very obvious 3D holographic display effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic illustration of a photopolymer film according to an embodiment of the present invention;
FIG. 2 is a flow chart of an embodiment of the present invention for curing a photopolymer information layer on a substrate by UV adhesive curing transfer;
fig. 3 is a flow chart of the curing of a photopolymer information layer on a substrate by hot melt adhesive curing transfer according to an embodiment of the present invention.
Wherein, 1, a basal membrane; 2. a protective film; 3. a photopolymer information layer.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present invention may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
The invention is described in detail below with reference to the figures and alternative embodiments.
As shown in fig. 1, as an embodiment of the present invention, disclosed is a photopolymer film comprising a base film 1, a protective film 2, and a photopolymer information layer 3; the photopolymer information layer is laid on the base film, and the protective film covers the photopolymer information layer; the thickness of the photopolymer information layer is 3 to 25 μm.
The 3D stereoscopic effect of the laser film layer is not obvious, and the reflection holographic display is another display mode with the very obvious 3D stereoscopic effect under white light. In order to ensure the 3D stereoscopic effect, the holographic film of the reflection holographic display must be a volume holographic grating structure, and the photopolymer film is one of the volume holographic grating structure films. The thickness of the photopolymer information layer is 3-25 mu m, the reflection brightness is high, light rays are not easily absorbed by the photopolymer information layer, the diffraction efficiency of the photopolymer information layer is high, the brightness is high, the 3D pattern is bright and clear, and the 3D effect is very obvious. The three-dimensional holographic display method can be widely applied to various printing stocks, and very obvious 3D holographic display effect is realized.
The thickness of the layer of photopolymer information layer determines the brightness of the photopolymer information layer. For ease of understanding, a photopolymer information layer having a certain thickness may be understood as a stack of multiple reflective films (which, for ease of understanding, is not actually formed by a stack of multiple reflective films), each of which may reflect a certain amount of light. The thicker the layer thickness of the photopolymer information layer is, which corresponds to the more reflective layers, the more sufficient the reflection and the higher the brightness of the photopolymer information layer. However, the thickness of the layer of the photopolymer information layer is not as thick as possible, and if it is too thick, the photopolymer information layer itself absorbs light, which in turn reduces the brightness of the photopolymer information layer. The thickness of the photopolymer information layer is 3-25 mu m.
Specifically, the thickness of the photopolymer information layer is within the range of 3-25 μm, and when the thickness is less than 3 μm, the brightness of the photopolymer information layer is only less than 50%; when the thickness is 3 μm, the brightness can reach 50% -60%; when the thickness exceeds 6 μm, the brightness can reach more than 90%; when the thickness exceeds 10 μm, the luminance can reach 100%.
Optionally, the thickness of the photopolymer information layer is 6 to 9 μm. In the scheme, the thickness of the photopolymer is 6-9 mu m, the brightness is high, the thickness is thin, and no obvious concave-convex feeling exists after the photopolymer is solidified on a printing stock. In particular, the thickness of the photopolymer information layer may be 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm. The thickness of the protective film can be 50 microns or more, so that the base film and the photopolymer information layer are cut in the subsequent pre-die cutting process, and the protective film is not easy to cut.
Alternatively, the resolution of the photopolymer information layer is 6000 lines/mm or more, which can make the detail of the relief pattern of the photopolymer information layer clear. The thickness of the photopolymer information layer is 3-25 μm, the resolution is above 6000 lines/mm, and the 3D stereoscopic effect that the holographic pattern is lifelike and has clear details can be ensured. Interference fringes formed in the photopolymer information layer are approximately parallel to the surface of the coating, and the interference fringes in turn form a refractive index modulation grating.
In particular, the photopolymer film can be formed into a roll and the 3D holographic pattern on the photopolymer information layer can be equally spaced. The edge of the 3D holographic pattern can be set with a reflection holographic positioning mark, so that the position of the 3D holographic pattern can be conveniently positioned in the subsequent process. The base film and the protective film can be both high-transparency PET films and can also be other films. The photopolymer information layer can be peeled from the base film and the protective film.
The cost of the photopolymer material is high, and only the printing position of the printing stock needs to be solidified with the photopolymer information layer during transfer and solidification. If the surface of the whole printing stock is compounded with a layer of photopolymerization material, a lot of unnecessary cost is increased, so that the 3D holographic pattern (namely an information area) can be accurately positioned at a designated printing position by setting a reflection holographic positioning mark at the edge of the 3D holographic pattern, and the material of the photopolymerization material is saved. The cost is saved.
In the production of photopolymer films, a photopolymer material is formulated with a solvent to form a liquid having a certain solids content. Selecting a proper high-transmittance PET film, uniformly coating the wet film of the photopolymerization material on the high-transmittance PET film (protective film) on a coating machine with a hot drying tunnel, and removing the solvent in the wet film of the photopolymerization material through the hot drying tunnel. When the photo-polymerization material reaches the other end of the drying tunnel and comes out, another high-transparency PET film (base film) is used for compounding, and the photo-polymerization material is made into a sandwich biscuit type to form a photo-polymerization information layer. At this point, the solvent in the photopolymer information layer is substantially dried, but remains tacky. The protective film and the base film may be made of the same material or different materials. After the photopolymerisable material is exposed, uv cured and heated, the protective film and the base film can be stripped from the photopolymerisable material. In the above, the photopolymer information layer is coated on the protective film, and then the base film is compounded, the time for contacting the protective film and the photopolymer information layer is longer, and the protective film and the photopolymer information layer are subjected to the heat drying and dehumidifying process together, so that the adhesion between the protective film and the photopolymer information layer is firmer than that between the protective film and the photopolymer information layer, and the base film can be smoothly stripped in the subsequent base film stripping process without bringing the photopolymer information layer up.
After exposure, the photopolymerizable material carries a low intensity hologram, called a latent image. And (3) curing by using a UV lamp, heating for 2-4 minutes at the temperature of 95 +/-5 ℃, wherein the latent image can be brightened, and the diffraction efficiency can reach more than 90%. In the process of enhancing the latent image to make the latent image bright, the final brightness is low when the heating temperature is too low, and the protective film and the base film are easy to deform when the heating temperature is too high; if the heating time is not enough, the final brightness is low, and if the heating time is too long, the production efficiency is low.
As another embodiment of the present invention, a method of making a photopolymer substrate for curing a photopolymer information layer as described above onto a substrate is disclosed. The preparation method comprises the following steps:
step 1: pre-die cutting the photopolymer film, cutting the photopolymer information layer, without cutting the protective film;
step 2: curing the information area of the die-cut photopolymer information layer to the substrate, and stripping the protective film and the non-information area of the photopolymer information layer.
The method of this example includes pre-die cutting the photopolymer film, cutting the photopolymer information layer without cutting the protective film, then curing the information area of the photopolymer information layer to the substrate, and stripping the protective film and the non-information area of the photopolymer information layer. The pre-die-cut photopolymer information layer is firstly subjected to curing, the information area is easily separated from the protective film and the non-information area, and the edge of the information area of the printing stock is cured to be neat.
In step 2, only the information areas of the photopolymer information layer are cured to the substrate and the non-information areas are not cured on the substrate. After the information area is solidified, the protective film is stripped, and simultaneously, the uncured non-information area is taken away by the protective film.
The information area of the photopolymer information layer is the area where the 3D holographic pattern is located, and the non-information area of the photopolymer information layer is the area on the photopolymer information layer other than the information area, such as the corner area.
The thickness of the laser film layer is about 1-2 mu m, the thickness is small, and the laser film layer can be produced by die pressing through carving a nickel plate. However, the photopolymer information layer should have a thickness of 3 to 25 μm to ensure its obvious 3D stereoscopic effect. The photopolymer information layer can not be produced by the mould pressing mode of a laser film, and the thicker photopolymer information layer can not be transferred and solidified to the surface of a printing stock by the mode of a hot stamping film, and the section is clear.
Therefore, in relation to the curing of the information areas of the photopolymer information layer to the substrate, the present invention adds a pre-die cutting process to the photopolymer film itself, taking into account the thicker thickness of the photopolymer information layer, and cures the information areas of the photopolymer information layer to the substrate in a manner similar to UV curing or localized ironing.
Specifically, as shown in fig. 2, when UV curing is adopted, step 1 further includes: the photopolymer film is pre-die cut, the base film is cut, and the base film is peeled. In this scheme, when the cross cutting in advance, also cut off the base film simultaneously. After the base film is cut, the base film at the corresponding position can be peeled off to expose the photopolymer information layer, so that the photopolymer information layer can be bonded on a printing stock in the following process. The thickness of the protective film may be 50 microns or more to ensure that the base film and photopolymer information layer are cut during pre-die cutting, while the protective film is not easily cut.
Correspondingly, when the UV curing is adopted, the step 2 further comprises:
printing or spraying UV glue on the printing position of a printing stock;
the information areas of the photopolymer information layer are bonded to the substrate locations of the printing material and UV cured.
According to the scheme, the UV glue is printed or sprayed on the printing position, the information area of the photopolymer information layer is adhered to the printing position of the printing stock, and the information area of the photopolymer information layer is solidified on the printing position of the printing stock through UV solidification, so that the transfer solidification of the photopolymer information layer with thicker thickness is finally realized. After the information area is solidified, the protective film and the uncured non-information area are stripped. During the processing, the UV glue has no or little influence on the photopolymer information layer and cannot damage the photopolymer information layer.
The surface of the base film which is pre-die-cut can be compounded with a tearing film for tearing, such as a film with back adhesive, paper or electrostatic film/non-setting adhesive, and the tearing film is directly torn, so that the base film is taken up to ensure that the cut base film can be completely peeled from the holographic photopolymer information layer.
Specifically, as shown in fig. 3, when the positioning ironing curing is adopted, step 1 further includes:
stripping the base film;
and coating an isolation protective layer on the photopolymer information layer, and coating hot melt adhesive on the isolation protective layer.
In the scheme, the base film is stripped firstly, and after the isolation protective layer is coated, the hot melt adhesive is coated, so that the subsequent heating and curing information area is facilitated. In this step, the photopolymer information layer is coated entirely with a protective barrier layer and a hot melt adhesive. The isolation protective layer can play the roles of heat insulation, acid and alkali resistance, light aging resistance and the like, and can isolate the photopolymer information layer from the hot melt adhesive to prevent the hot melt adhesive from influencing the photopolymer information layer.
Correspondingly, when the positioning ironing and curing are adopted, the step 2 further comprises the following steps: and adhering the photopolymer information layer on the printing stock, heating the printing position of the printing stock, and solidifying the information area of the photopolymer information layer on the printing position of the printing stock. In the scheme, the printing position of the printing stock is heated, the hot melt adhesive is melted when heated, the information area of the photopolymer information layer is solidified on the printing position of the printing stock through the hot melt adhesive, and finally the transfer solidification of the photopolymer information layer with thicker thickness is realized.
In order to position the photopolymer information layer precisely at the printing position of the printing material, a positioning electric eye can be arranged within each printing length of the printing material. In subsequent processing, the relative positions of the printing stock positioning electric eye and the reflection holographic positioning mark on the photopolymer information layer are determined, and accurate positioning is realized.
The method for preparing the photopolymer printing material of the embodiment can transfer and cure the thicker photopolymer information layer on the surface of the printing material by adding the pre-die cutting process and in a manner similar to UV curing and positioning ironing, and the edge section is clear. The photopolymer information layer can be perfectly integrated with a printing stock, has irreversibility and is difficult to peel off from the printing stock.
As another embodiment of the present invention, there is disclosed the use of a photopolymer film as described above on a substrate. The photopolymer information layer of the photopolymer film is transferred and cured on the printing stock, the 3D pattern is very bright and clear, and the 3D effect is very obvious.
As another embodiment of the present invention, a photopolymer substrate is disclosed comprising a substrate and a photopolymer information layer; the photopolymer information layer is solidified on a printing stock, and the thickness of the photopolymer is 3-25 mu m.
The thickness of the photopolymer information layer is 3-25 mu m, the reflection brightness is high, light is not easy to be absorbed by the photopolymer information layer, the diffraction efficiency of the photopolymer information layer is very high, the brightness is high, the 3D stereoscopic pattern of the photopolymer printing stock is very bright and clear, and the 3D stereoscopic effect is very obvious.
The photopolymer substrates of the present invention include paper products, films, glass products and the like
It should be noted that, the limitations of the steps involved in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all should be considered to belong to the protection scope of the present disclosure.
The foregoing is a more detailed description of the invention in connection with specific alternative embodiments, and the practice of the invention should not be construed as limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A photopolymer film comprising a base film, a protective film and a photopolymer information layer; the photopolymer information layer is laid on the base film, and the protective film covers the photopolymer information layer; the thickness of the photopolymer information layer is 3-25 mu m.
2. The photopolymer film of claim 1, wherein the thickness of the photopolymer information layer is 6 to 9 μm.
3. The photopolymer film of claim 2, wherein the resolution of the photopolymer information layer is 6000 lines/mm or more.
4. A method of preparing a photopolymer substrate comprising:
step 1: pre-die cutting the photopolymer film, cutting the photopolymer information layer, without cutting the protective film;
step 2: curing the information area of the die-cut photopolymer information layer to the substrate, and stripping the protective film and the non-information area of the photopolymer information layer.
5. The method of claim 4, wherein step 1 further comprises:
the photopolymer film is pre-die cut, the base film is cut, and the base film is peeled.
6. The method of claim 5, wherein step 2 further comprises:
printing or spraying UV glue on the printing position of a printing stock;
the information areas of the photopolymer information layer are bonded to the substrate locations of the printing material and UV cured.
7. The method of claim 4, wherein step 1 is preceded by the further step of:
stripping the base film;
and coating an isolation protective layer on the photopolymer information layer, and coating hot melt adhesive on the isolation protective layer.
8. The method of claim 7, wherein step 2 further comprises:
and adhering the photopolymer information layer on the printing stock, heating the printing position of the printing stock, and solidifying the information area of the photopolymer information layer on the printing position of the printing stock.
9. Use of a photopolymer film according to any of claims 1 to 3 on a substrate.
10. A photopolymer substrate comprising a substrate and a photopolymer information layer; the photopolymer information layer is solidified on the printing stock, and the thickness of the photopolymer is 3-25 mu m.
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| CN202111364647.9A CN114055974A (en) | 2021-11-17 | 2021-11-17 | Photopolymer film and application thereof, photopolymer printing stock and preparation method |
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| CN202111364647.9A CN114055974A (en) | 2021-11-17 | 2021-11-17 | Photopolymer film and application thereof, photopolymer printing stock and preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114721081A (en) * | 2022-04-21 | 2022-07-08 | 杭州光粒科技有限公司 | Low-adhesion holographic film, preparation method thereof and application of low-adhesion holographic film in preparation of AR (augmented reality) display element |
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| CN113119628A (en) * | 2021-04-19 | 2021-07-16 | 上海宏盾防伪材料有限公司 | Method and structure for manufacturing security card |
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| CN106094435A (en) * | 2016-06-03 | 2016-11-09 | 深圳市深大极光科技有限公司 | A kind of photopolymer thin film sensitive material that can be used for holographic recording and preparation method thereof |
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