CN110949032A - Color anti-counterfeiting paper with three-dimensional effect and preparation method thereof - Google Patents

Color anti-counterfeiting paper with three-dimensional effect and preparation method thereof Download PDF

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Publication number
CN110949032A
CN110949032A CN201911243556.2A CN201911243556A CN110949032A CN 110949032 A CN110949032 A CN 110949032A CN 201911243556 A CN201911243556 A CN 201911243556A CN 110949032 A CN110949032 A CN 110949032A
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Prior art keywords
white cardboard
paper
front surface
counterfeiting
ink
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CN201911243556.2A
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CN110949032B (en
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赵晋彬
吕伟
闵东
郭鹏飞
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Shenzhen Jinjia Group Co Ltd
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Shenzhen Jinjia Group Co Ltd
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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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/50—Sympathetic, colour changing or similar inks
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Printing Methods (AREA)
  • Paper (AREA)

Abstract

The invention provides color anti-counterfeiting paper with a three-dimensional effect and a preparation method thereof, wherein the method comprises the following steps: printing UV (ultraviolet) flexo printing ink on the front surface of the white cardboard in a flexo printing mode, carrying out UV irradiation on the UV flexo printing ink, and forming a UV flexo printing ink layer on the front surface of the white cardboard; printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode; imprinting the front surface of the white cardboard by adopting a flexible plate with a pattern, and carrying out UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard; and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect. The invention effectively solves the problems of unstable color and three-dimensional effect, low production efficiency and large pollution of the existing color special paper.

Description

Color anti-counterfeiting paper with three-dimensional effect and preparation method thereof
Technical Field
The invention relates to the field of color paper printing, in particular to color anti-counterfeiting paper with a three-dimensional effect and a preparation method thereof.
Background
The traditional manufacturing process of special color paper is that a paper mill adds dye into paper pulp in the paper making process, as shown in figure 1, the traditional whole paper making process needs to add dye for multiple times to adjust the color, which causes that the color stability is difficult to monitor in the whole production process, so that the product consistency is poor, and the dyeing process uses dye paste, so that a large amount of waste water is produced in the production process, the environmental pollution is serious, and the VOCs content of the prepared paper is high.
Part of the traditional color special paper has a three-dimensional embossing effect, and the production process is a process for finishing the three-dimensional embossing effect through independent embossing equipment after the paper is produced. The existing embossing process is limited to thick line textures, the texture effect is unstable in the production process, and fine patterns and a strong three-dimensional effect cannot be achieved. Meanwhile, the embossed paper has uneven surface, which brings many production difficulties for subsequent printing and post-processing.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide the color anti-counterfeiting paper with the three-dimensional effect and the preparation method thereof, and aims to solve the problems of unstable color and three-dimensional effect, low production efficiency and large pollution of the existing color special paper.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of color anti-counterfeiting paper with a three-dimensional effect comprises the following steps:
printing UV (ultraviolet) flexo printing ink on the front surface of the white cardboard in a flexo printing mode, carrying out UV irradiation on the UV flexo printing ink, and forming a UV flexo printing ink layer on the front surface of the white cardboard;
printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode;
imprinting the front surface of the white cardboard by adopting a flexible plate with a pattern, and carrying out UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard;
and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises the following steps of 20-35% of epoxy acrylic resin, 5-10% of 1, 6-hexanediol diacrylate, 5-10% of tripropylene glycol diacrylate, 10-15% of trimethylolpropane triacrylate, 3-5% of 2, 4, 6- (trimethylbenzoyl) diphenyl phosphine oxide, 3-5% of benzophenone derivative and 20-40% of pigment by weight, wherein the pigment comprises a fluorescent material BaGd2(MoO4)4。
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises the following steps of printing UV (ultraviolet) flexo printing ink on the front surface of a white cardboard in a flexo printing mode:
two ink pumps are adopted to supply ink simultaneously to carry out two groups of coatings of flexography, wherein the number of coating anilox roller lines is 80-120L/cm, and the ink carrying capacity of the anilox roller is 8.0-13.0cm3/m2。
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises the step of irradiating the color anti-counterfeiting paper with UV (ultraviolet) at a power of 15-20 Kw.
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises, by weight, 40-60% of acrylic resin, 10-25% of reactive diluent, 10-15% of pearl powder, 5-10% of photoinitiator and 1-3% of auxiliary agent, wherein the pearl powder contains an optical color-changing pigment RGB 20.
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect is characterized in that the Shore hardness of the flexible plate with the patterns is 90-95D.
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises the step of preparing the anti-counterfeiting pattern, wherein the anti-counterfeiting pattern comprises at least one of characters, a product LOGO and graphics.
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises the steps of enabling the thickness of the white cardboard to be uniform, and enabling the quantitative amount of the white cardboard to be 170-200g/m2。
The preparation method of the color anti-counterfeiting paper with the three-dimensional effect comprises the steps of preparing a piece of double-sided offset paper, wherein the double-sided offset paper is semitransparent, and the quantitative content of the double-sided offset paper is 50g/m2。
The invention relates to color anti-counterfeiting paper with a three-dimensional effect, which is prepared by adopting the preparation method.
Has the advantages that: according to the invention, UV flexo printing ink is printed on the front surface of the white cardboard by using a flexo printing mode through a glossing seat printing of an offset press, the printing ink layer is thick, the color stability is good, and the discharge of VOCs is avoided; after color printing, connecting lines for UV pearl coating, and also adopting a flexographic printing mode to realize, after pearl coating, impressing by using a specially-made flexographic plate with pattern information, drying after impressing to obtain a three-dimensional effect, printing an anti-counterfeiting pattern on the back, and selecting semitransparent writing paper for gluing and attaching to obtain the color anti-counterfeiting paper with the three-dimensional effect. The invention effectively solves the problems of unstable color and three-dimensional effect, low production efficiency and large pollution of the existing color special paper.
Drawings
Fig. 1 is a flow chart of a conventional preparation process of a colored specialty paper.
Fig. 2 is a flow chart of a method for preparing color anti-counterfeiting paper with a three-dimensional effect according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of the color anti-counterfeiting paper with a three-dimensional effect prepared by the invention.
Fig. 4 is a schematic view of a color anti-counterfeit paper with a three-dimensional effect according to embodiment 1 of the present invention.
Fig. 5 is a schematic view of a color anti-counterfeit paper with a three-dimensional effect according to embodiment 2 of the present invention.
Fig. 6 is a schematic view of a color anti-counterfeit paper with a three-dimensional effect according to embodiment 3 of the present invention.
Fig. 7 is a schematic view of a color anti-counterfeit paper with a three-dimensional effect according to embodiment 4 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the traditional color papermaking process, the dye is required to be added for multiple times to adjust the color, so that the color stability in the whole production process is difficult to monitor, the product consistency is poor, in addition, the dye color paste is used in the dyeing process, so that a large amount of waste water is generated in the production process, the environmental pollution is serious, and the VOCs content of the prepared paper is higher; the traditional stereoscopic effect paper is mainly produced by using color special paper through independent embossing equipment, however, the existing embossing process is limited to thick line textures, the texture effect is unstable, and fine patterns and a strong stereoscopic effect cannot be realized.
Based on the problems in the prior art, the invention provides a preparation method of color anti-counterfeiting paper with a three-dimensional effect, wherein as shown in fig. 2, the preparation method comprises the following steps:
s10, printing UV (ultraviolet) flexo printing ink on the front surface of the white cardboard in a flexo printing mode, carrying out UV irradiation on the UV flexo printing ink, and forming a UV flexo printing ink layer on the front surface of the white cardboard;
s20, printing UV pearlescent ink on the surface of the UV flexo ink layer in a flexo printing mode;
s30, stamping the front surface of the white cardboard by adopting a flexible plate with a pattern, and carrying out UV irradiation on the front surface of the white cardboard after stamping to form a three-dimensional pattern effect on the front surface of the white cardboard;
s40, printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
In the embodiment, UV flexo printing ink is printed on the front surface of the white cardboard by a flexo printing mode through a glossing seat of an offset press, the printing ink layer is thick, the color stability is good, and the discharge of VOCs is avoided; after color printing, connecting lines for UV pearl coating, and also adopting a flexographic printing mode to realize, after pearl coating, impressing by using a specially-made flexographic plate with pattern information, drying after impressing to obtain a three-dimensional effect, printing an anti-counterfeiting pattern on the back, and selecting semitransparent writing paper for gluing and attaching to obtain the color anti-counterfeiting paper with the three-dimensional effect. The embodiment effectively solves the problems of unstable color and stereoscopic effect, low production efficiency and high pollution of the existing color special paper.
In some embodiments, a uniform thickness and a basis weight of 170-200g/m is selected2The white cardboard of (2) is printed and coated with color.
In some embodiments, the step of printing the UV flexo ink on the front surface of the white cardboard by using a flexo printing method comprises: two ink pumps are adopted to supply ink simultaneously to carry out two groups of coatings of flexography, wherein the number of coating anilox roller lines is 80-120L/cm, and the ink carrying capacity of the anilox roller is 8.0-13.0cm3/m2. In the embodiment, two groups of coatings are subjected to flexography, and two ink pumps of one ink cylinder supply ink at the same time, so that the consistency of coating colors can be ensured; the coating plate material of the embodiment adopts a rubber plate material, wherein the number of the anilox roller lines is 80-120L/cm, and the ink carrying capacity of the anilox roller is 8.0-13.0cm3/m2。
In some embodiments, in order to increase the coating amount of the ink, the UV flexo ink is coated on the front surface of the white cardboard by using a reverse coating method, wherein the reverse coating method means that the moving direction of the white cardboard is opposite to the moving direction of the coating plate. In some specific embodiments, the UV flexo ink is applied in an amount of 5 to 7g/m during printing by reverse coating2。
In some embodiments, the UV flexo ink comprises, in weight percent, 20-35% epoxy acrylic resin, 5-10% 1, 6-hexanediol diacrylate, 5-10% tripropylene glycol diacrylate, 10-15% trimethylolpropane triacrylate, 3-5% 2, 4, 6- (trimethylbenzyl) acrylateAcyl) diphenylphosphine oxide, 3-5% of benzophenone derivative, and 20-40% of a pigment comprising the fluorescent material BaGd2(MoO4)4. The fluorescent material BaGd2(MoO4)4Can be seen under an ultraviolet lamp, and has an anti-counterfeiting effect. The UV flexo printing ink has the advantages of uniform pigment dispersion, good color stability, high drying speed, good flexibility, excellent chemical resistance, good yellowing resistance, good fluidity and good printability.
In some embodiments, after printing the coating color, the UV lamp is used for irradiation drying, and a UV flexible printing ink layer is formed on the front surface of the white cardboard, wherein the power of the UV irradiation is 15-20 Kw.
In some embodiments, after the UV flexographic ink layer is dried, a UV pearlescent ink is printed on the surface of the UV flexographic ink layer by using a flexo printing method. In this embodiment, the UV pearlescent ink includes, by weight, 40 to 60% of acrylic resin, 10 to 25% of reactive diluent, 10 to 15% of pearlescent powder, 5 to 10% of photoinitiator, and 1 to 3% of auxiliary agent, where the pearlescent powder includes an optical color-changing pigment RGB 20. The pearl powder contains optical color changing pigment RGB20 (purple to gold), and can realize optical color changing anti-counterfeiting. The pearlescent powder of the UV flexo printing pearlescent ink is uniformly dispersed and has strong pearlescent effect, and the UV flexo printing pearlescent ink does not cause ink migration after being subjected to special flexo printing before being cured, so that the pearlescent effect on the surface of a printed product is uniform and consistent, and the printability is good.
In some embodiments, the front side of the white cardboard is imprinted with a specially patterned flexographic plate after printing with a UV pearlescent ink, the patterned flexographic plate having a shore hardness of from 90 to 95D.
In some embodiments, after the printing, the UV pearlescent ink is irradiated by a UV lamp to be dried, and the pattern effect on the printing plate can appear at the printed position after the drying, so that the three-dimensional pattern effect is formed.
In some embodiments, after printing a security pattern on the back surface of the white cardboard and attaching a double-sided offset paper to the back surface of the white cardboard for mounting, a color security paper with a three-dimensional effect is obtained as shown in fig. 3. In this embodiment, the anti-counterfeit pattern includes at least one of a text, a product LOGO, and a graphic, but is not limited thereto; the double-sided gummed paper is semitransparent, and after mounting, the anti-counterfeiting pattern clamped between the double-sided gummed paper can be seen through the mounting paper.
In some embodiments, the invention further provides a colored anti-counterfeiting paper with a three-dimensional effect, wherein the colored anti-counterfeiting paper is prepared by the preparation method.
The following explains the color anti-counterfeit paper with three-dimensional effect and the preparation method thereof further by specific embodiments:
example 1
1. Printing UV flexo printing ink on the front surface of the white cardboard by adopting a flexo printing mode, and carrying out UV irradiation on the UV flexo printing ink to form a UV flexo printing ink layer on the front surface of the white cardboard, wherein the UV flexo printing ink comprises 30 percent of epoxy acrylic resin, 8 percent of 1, 6-hexanediol diacrylate, 8 percent of tripropylene glycol diacrylate, 14 percent of trimethylolpropane triacrylate, 5 percent of 2, 4, 6- (trimethylbenzoyl) diphenylphosphine oxide, 5 percent of benzophenone derivative and 30 percent of pigment in percentage by weight;
2. printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode, wherein the UV comprises 50% of acrylic resin, 22% of reactive diluent, 15% of pearlescent powder, 10% of photoinitiator and 3% of auxiliary agent in percentage by weight.
3. Imprinting the front surface of the white cardboard by using a flexible plate with the pattern shown in fig. 4, and performing UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard, as shown in fig. 4;
4. and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
Example 2
1. Printing UV flexo printing ink on the front surface of the white cardboard by adopting a flexo printing mode, and carrying out UV irradiation on the UV flexo printing ink to form a UV flexo printing ink layer on the front surface of the white cardboard, wherein the UV flexo printing ink comprises 35 percent of epoxy acrylic resin, 5 percent of 1, 6-hexanediol diacrylate, 5 percent of tripropylene glycol diacrylate, 10 percent of trimethylolpropane triacrylate, 5 percent of 2, 4, 6- (trimethylbenzoyl) diphenylphosphine oxide, 3 percent of benzophenone derivative and 37 percent of pigment in percentage by weight;
2. printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode, wherein the UV comprises 55% of acrylic resin, 25% of reactive diluent, 10% of pearlescent powder, 8% of photoinitiator and 2% of auxiliary agent in percentage by weight.
3. Imprinting the front surface of the white cardboard by using a flexible plate with the pattern shown in fig. 5, and performing UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard, as shown in fig. 5;
4. and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
Example 3
1. Printing UV flexo printing ink on the front surface of the white cardboard by adopting a flexo printing mode, and carrying out UV irradiation on the UV flexo printing ink to form a UV flexo printing ink layer on the front surface of the white cardboard, wherein the UV flexo printing ink comprises 25 percent of epoxy acrylic resin, 10 percent of 1, 6-hexanediol diacrylate, 10 percent of tripropylene glycol diacrylate, 10 percent of trimethylolpropane triacrylate, 5 percent of 2, 4, 6- (trimethylbenzoyl) diphenylphosphine oxide, 5 percent of benzophenone derivative and 35 percent of pigment in percentage by weight;
2. printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode, wherein the UV comprises 55% of acrylic resin, 22% of reactive diluent, 13% of pearlescent powder, 7% of photoinitiator and 3% of auxiliary agent in percentage by weight.
3. Imprinting the front surface of the white cardboard by using a flexible plate with the pattern shown in fig. 6, and performing UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard, as shown in fig. 6;
4. and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
Example 4
1. Printing UV flexo printing ink on the front surface of the white cardboard by adopting a flexo printing mode, and carrying out UV irradiation on the UV flexo printing ink to form a UV flexo printing ink layer on the front surface of the white cardboard, wherein the UV flexo printing ink comprises 32 percent of epoxy acrylic resin, 8 percent of 1, 6-hexanediol diacrylate, 8 percent of tripropylene glycol diacrylate, 12 percent of trimethylolpropane triacrylate, 5 percent of 2, 4, 6- (trimethylbenzoyl) diphenylphosphine oxide, 5 percent of benzophenone derivative and 30 percent of pigment in percentage by weight;
2. printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode, wherein the UV comprises 58% of acrylic resin, 20% of reactive diluent, 10% of pearlescent powder, 9% of photoinitiator and 3% of auxiliary agent in percentage by weight.
3. Imprinting the front surface of the white cardboard by using a flexible plate with the pattern shown in fig. 7, and performing UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard, as shown in fig. 7;
4. and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
In conclusion, the UV flexo printing ink is printed on the front surface of the white cardboard by the flexo printing mode through the printing of the upper gloss seat of the offset press, the printing ink layer is thick, the color stability is good, and the discharge of VOCs is avoided; after color printing, connecting lines for UV pearl coating, and also adopting a flexographic printing mode to realize, after pearl coating, impressing by using a specially-made flexographic plate with pattern information, drying after impressing to obtain a three-dimensional effect, printing an anti-counterfeiting pattern on the back, and selecting semitransparent writing paper for gluing and attaching to obtain the color anti-counterfeiting paper with the three-dimensional effect. The invention effectively solves the problems of unstable color and three-dimensional effect, low production efficiency and large pollution of the existing color special paper.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. A preparation method of color anti-counterfeiting paper with a three-dimensional effect is characterized by comprising the following steps:
printing UV (ultraviolet) flexo printing ink on the front surface of the white cardboard in a flexo printing mode, carrying out UV irradiation on the UV flexo printing ink, and forming a UV flexo printing ink layer on the front surface of the white cardboard;
printing UV pearlescent ink on the surface of the UV flexo printing ink layer in a flexo printing mode;
imprinting the front surface of the white cardboard by adopting a flexible plate with a pattern, and carrying out UV irradiation on the front surface of the white cardboard after imprinting to form a three-dimensional pattern effect on the front surface of the white cardboard;
and printing an anti-counterfeiting pattern on the back surface of the white cardboard, and pasting double-sided offset paper on the back surface of the white cardboard for mounting to obtain the color anti-counterfeiting paper with the three-dimensional effect.
2. The method for preparing color security paper with three-dimensional effect according to claim 1, wherein the UV flexo ink comprises 20-35% of epoxy acrylic resin, 5-10% of 1, 6-hexanediol diacrylate, 5-10% of tripropylene glycol diacrylate, 10-15% of trimethylolpropane triacrylate, 2, 4, 6- (trimethylbenzoyl) diphenylphosphine oxide, 3-5% of benzophenone derivative, and 20-40% of pigment containing fluorescent material BaGd2(MoO4)4。
3. The method for preparing color anti-counterfeiting paper with a three-dimensional effect according to claim 1, wherein the step of printing UV flexo printing ink on the front surface of the white cardboard by a flexo printing method comprises the following steps:
two ink pumps are adopted to supply ink simultaneously to carry out two groups of coatings of flexography, wherein the number of coating anilox roller lines is 80-120L/cm, and the ink carrying capacity of the anilox roller is 8.0-13.0cm3/m2。
4. The method for preparing color anti-counterfeiting paper with the stereoscopic effect according to claim 1, wherein the power of the UV irradiation is 15-20 Kw.
5. The method for preparing color anti-counterfeiting paper with a three-dimensional effect according to claim 1, wherein the UV pearlescent ink comprises 40-60% of acrylic resin, 10-25% of reactive diluent, 10-15% of pearlescent powder, 5-10% of photoinitiator and 1-3% of auxiliary agent by weight, and the pearlescent powder comprises optical color changing pigment RGB 20.
6. The method for preparing color anti-counterfeiting paper with the stereoscopic effect according to claim 1, wherein the shore hardness of the flexible plate with the patterns is 90-95D.
7. The method for preparing color anti-counterfeiting paper with the stereoscopic effect according to claim 1, wherein the anti-counterfeiting pattern comprises at least one of characters, product LOGO and graphics.
8. The method as claimed in claim 1, wherein the thickness of the white cardboard is uniform, and the quantitative ratio of the white cardboard is 170-200g/m2。
9. The method for preparing color anti-counterfeiting paper with three-dimensional effect according to claim 1, wherein the double-sided offset paper is semi-transparent and has a basis weight of 50g/m2。
10. A color anti-counterfeiting paper with a three-dimensional effect, which is characterized by being prepared by the preparation method of any one of claims 1 to 9.
CN201911243556.2A 2019-12-06 2019-12-06 Color anti-counterfeiting paper with three-dimensional effect and preparation method thereof Active CN110949032B (en)

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* Cited by examiner, † Cited by third party
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