Gold stamping process on UV (ultraviolet) frosted ink
阅读说明：本技术 Uv磨砂油墨上的烫金工艺 (Gold stamping process on UV (ultraviolet) frosted ink ) 是由 周聪 陆锦兵 徐鹏 屈丽华 谢徽 周君良 于 2020-12-31 设计创作，主要内容包括：本发明属于烫金技术领域,尤其涉及一种UV磨砂油墨上的烫金工艺,包括以下步骤：提供承印物；制备UV磨砂油墨,丝印UV磨砂油墨至承印物上,UV磨砂油墨包括预聚物、单体、光引发剂、助剂及磨砂粉；预聚物包括超支化聚酯丙烯酸酯、脂肪族聚氨酯和脂肪族丙烯酸-丙烯酸酯共聚物；单体至少包括1,6-己二醇二丙烯酸酯；光引发剂至少包括硫代苯基-对氧氮环丙酮；助剂至少包括消泡剂；制备铁灰金烫金料,在UV磨砂油墨上烫上铁灰金烫金料,铁灰金烫金料包括丙烯酸、甲基丙烯酸、丙烯酸丁酯、丙烯酸羟乙酯、甲基丙烯酸甲酯、丁酮、乙酸乙酯、偶氮二异丁腈和助剂。本发明的工艺,实现在UV磨砂油墨上烫上铁灰金烫金料,并且保证产品质量良好。(The invention belongs to the technical field of gold stamping, and particularly relates to a gold stamping process on UV (ultraviolet) frosted ink, which comprises the following steps: providing a printing stock; preparing UV frosted ink, and silk-screening the UV frosted ink on a printing stock, wherein the UV frosted ink comprises prepolymer, monomer, photoinitiator, auxiliary agent and frosted powder; the prepolymer comprises hyperbranched polyester acrylate, aliphatic polyurethane and aliphatic acrylic acid-acrylate copolymer; the monomer at least comprises 1, 6-hexanediol diacrylate; the photoinitiator at least comprises thiophenyl-p-oxazepine; the auxiliary agent at least comprises a defoaming agent; preparing an iron ash gold stamping material, and stamping the iron ash gold stamping material on UV frosted ink, wherein the iron ash gold stamping material comprises acrylic acid, methacrylic acid, butyl acrylate, hydroxyethyl acrylate, methyl methacrylate, butanone, ethyl acetate, azobisisobutyronitrile and an auxiliary agent. The process realizes the ironing of the iron ash gold stamping material on the UV frosted ink, and ensures the good quality of products.)
1. A gold stamping process on UV frosted ink is characterized in that: the method comprises the following steps:
s100: providing a printing stock;
s200: preparing UV frosted ink, and screen-printing the UV frosted ink on the printing stock, wherein the UV frosted ink comprises the following components in percentage by mass:
wherein the prepolymer comprises hyperbranched polyester acrylate, aliphatic polyurethane and aliphatic acrylic acid-acrylate copolymer; the monomers comprise 1, 6-hexanediol diacrylate and tripropylene glycol diacrylate; the photoinitiator comprises thiophenyl-p-oxazacyclopropanone and isopropyl thioxanthone; the auxiliary agent comprises a defoaming agent, a leveling agent and a dispersing agent;
s300: preparing an iron dust gold stamping material, and stamping the iron dust gold stamping material on the UV frosted ink, wherein the iron dust gold stamping material comprises acrylic acid, methacrylic acid, butyl acrylate, hydroxyethyl acrylate, methyl methacrylate, butanone, ethyl acetate, azobisisobutyronitrile and an auxiliary agent; the auxiliary agent is a modified polyacrylic acid polyester polymer or a fatty acid modified polymer.
2. The gold stamping process on UV matte ink as claimed in claim 1, wherein: the leveling agent comprises any one or a mixture of more than two of digao 410, digao 420 and digao 450; the frosting powder is polypropylene.
3. The gold stamping process on UV matte ink as claimed in claim 2, wherein: the UV frosted ink comprises the following components in percentage by mass:
4. the gold stamping process on UV matte ink as claimed in claim 3, wherein: the UV frosted ink comprises the following components in percentage by mass:
5. the gold stamping process on UV matte ink as claimed in claim 2, wherein: in the step S300, the prepared gray iron gold stamping material is attached to a base film, and then the gray iron gold stamping material on the base film is stamped on the UV frosted ink by an automatic stamping machine.
6. The gold stamping process on UV matte ink of claim 5, wherein: the amount of the auxiliary agent in the iron ash gold stamping material is 0.2-1% of that of the PET on the base film.
7. The gold stamping process on UV matte ink as claimed in claim 1, wherein: the UV frosted ink comprises 20% of frosted powder and 100% of UV frosted ink.
8. The gold stamping process on the UV matte ink according to any one of claims 1 to 6, wherein: in the step S100, the coating pressure when the printing stock is printed is 80-90 kg, the temperature is 100-120 ℃, and the production speed is 15-60 m/min.
9. The gold stamping process on the UV matte ink according to any one of claims 1 to 6, wherein: in the step S200, the screen mesh number adopted in the screen printing of the UV frosted ink is 300 meshes, the power of a mercury lamp is 12000W, the light emission is 1000 ± 100mm, the power density pressure is 80-90 kg, and the production speed is 400-500 headstock/h.
10. The gold stamping process on the UV matte ink according to any one of claims 1 to 6, wherein: in the step S300, a pressure shaft adopted when the iron ash gold stamping material is stamped is 2.3 +/-0.5 mm, the temperature is 130 +/-5 ℃, and the production speed is 3000-4500 locomotive/h.
Technical Field
The invention belongs to the technical field of gold stamping, and particularly relates to a gold stamping process on UV (ultraviolet) frosted ink.
Background
Along with the development of Chinese economy, the requirements of people on products in life are higher and higher, and the product packaging is more personalized and beautified. At present, domestic printed matters are subjected to post-processes of gold stamping, screen printing UV, convex striking, concave striking and the like to improve the grade, the attractiveness and the like of the printed matters.
The process effect is comparatively single behind the common printed matter on the market today, combines together to multiple technology, and the degree of difficulty is higher, and the direct gilt position of adopting UV of technology is stolen mostly to traditional UV seal back, and gilt needs to scald the blank paper material department behind the position is stolen to the UV.
This kind of traditional UV steals position technique not only destroys the integrality and the aesthetic property of original packaging design, and gilt cover position is inaccurate greatly increased the product defective rate moreover, and the cost is wasted, is difficult to directly reach the requirement of packing environmental protection. Meanwhile, when the traditional screen printing UV is combined with the gold stamping process, the problems of inaccurate overprinting, falling off of gold stamping materials and the like can be caused.
Disclosure of Invention
The invention aims to provide a gold stamping process on UV (ultraviolet) frosted ink, and aims to solve the problem of poor products in the prior art of gold stamping after UV printing.
In order to achieve the above object, an embodiment of the present invention provides a gold stamping process on a UV matte ink, including the following steps:
s100: providing a printing stock;
s200: preparing UV frosted ink, and screen-printing the UV frosted ink on the printing stock, wherein the UV frosted ink comprises the following components in percentage by mass:
wherein the prepolymer comprises hyperbranched polyester acrylate, aliphatic polyurethane and aliphatic acrylic acid-acrylate copolymer; the monomers comprise 1, 6-hexanediol diacrylate and tripropylene glycol diacrylate; the photoinitiator comprises thiophenyl-p-oxazacyclopropanone and isopropyl thioxanthone; the auxiliary agent comprises a defoaming agent, a leveling agent and a dispersing agent;
s300: preparing an iron dust gold stamping material, and stamping the iron dust gold stamping material on the UV frosted ink, wherein the iron dust gold stamping material comprises acrylic acid, methacrylic acid, butyl acrylate, hydroxyethyl acrylate, methyl methacrylate, butanone, ethyl acetate, azobisisobutyronitrile and an auxiliary agent; the auxiliary agent is a modified polyacrylic acid polyester polymer or a fatty acid modified polymer.
Preferably, the leveling agent comprises any one of or a mixture of more than two of digao 410, digao 420 and digao 450; the frosting powder is polypropylene.
Preferably, the UV frosted ink comprises the following components in percentage by mass:
more preferably, the UV frosted ink comprises the following components in percentage by mass:
preferably, in the step S300, the prepared gray iron gilding material is attached to a base film, and then the gray iron gilding material on the base film is gilded on the UV frosted ink by an automatic gilding press.
Preferably, the dosage of the auxiliary agent in the iron ash gold stamping material is 0.2-1% of that of the PET on the base film.
Preferably, the UV frosted ink has a frosting powder content of 20% by mass, and the sum of the mass percentages of the components of the UV frosting ink is 100%.
Preferably, in the step S100, the coating pressure when the printing material is printed is 80-90 kg, the temperature is 100-120 ℃, and the production speed is 15-60 m/min.
Preferably, in the step S200, the screen mesh number adopted in the screen printing of the UV frosted ink is 300 meshes, the power of a mercury lamp is 12000W, the luminescence is 1000 ± 100mm, the power density pressure is 80-90 kg, and the production speed is 400-500 headstock/h.
Preferably, in the step S300, a pressure axis used for ironing the iron ash gold material is 2.3 ± 0.5mm, the temperature is 130 ± 5 ℃, and the production speed is 3000-4500 locomotive/h.
One or more technical schemes in the gold stamping process on the UV frosted ink provided by the embodiment of the invention at least have one of the following technical effects: the gold stamping process on the UV frosted ink can realize gold stamping directly on the UV frosted ink for screen printing at one time, achieves the effect of combining two procedures, does not need to steal the position, does not need to set the position, and can produce personalized printed matters with gold stamping directly stamped on the surface of the UV frosted ink for screen printing on the premise of completely abandoning the UV steal position and gold stamping set position. The gold stamping process on the UV frosted ink can realize the gold stamping effect at one time and directly stamp the surface of the UV frosted ink, endows printed matters with three-dimensional touch feeling, increases gold stamping metallic feeling and increases product competitiveness.
Drawings
FIG. 1 is a graph comparing viscosity and adhesion for a first set of experiments in the experimental methods of the examples of the invention.
FIG. 2 is a graph comparing viscosity and adhesion for a second set of experiments in the experimental methods of the examples of the invention.
FIG. 3 is a graph comparing viscosity and abrasion resistance for a third set of experiments in the experimental methods of the examples of the invention.
FIG. 4 is a graph comparing viscosity and abrasion resistance for a fourth set of experiments in accordance with the experimental methods of the examples of the invention.
Detailed Description
The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.
The first embodiment.
In this embodiment, a gold stamping process on a UV matte ink is provided, including the following steps:
s100: providing a printing stock;
s200: preparing UV frosted ink, and screen-printing the UV frosted ink on the printing stock, wherein the UV frosted ink comprises the following components in percentage by mass:
wherein the prepolymer comprises hyperbranched polyester acrylate, aliphatic polyurethane and aliphatic acrylic acid-acrylate copolymer; the monomers comprise 1, 6-hexanediol diacrylate and tripropylene glycol diacrylate; the photoinitiator comprises thiophenyl-p-oxazacyclopropanone and isopropyl thioxanthone; the auxiliary agent comprises a defoaming agent, a leveling agent and a dispersing agent;
s300: preparing an iron dust gold stamping material, and stamping the iron dust gold stamping material on the UV frosted ink, wherein the iron dust gold stamping material comprises acrylic acid, methacrylic acid, butyl acrylate, hydroxyethyl acrylate, methyl methacrylate, butanone, ethyl acetate, azobisisobutyronitrile and an auxiliary agent; the auxiliary agent is a modified polyacrylic acid polyester polymer or a fatty acid modified polymer.
The gold stamping process on the UV frosted ink can realize gold stamping directly on the UV frosted ink of silk screen printing at one time, achieves the effect of combining two processes, does not need to steal the position, does not need the cover position, and can produce personalized printed matters directly stamped on the surface of the UV frosted ink of silk screen printing on the premise of completely abandoning the UV steal position and the gold stamping cover position. The gold stamping process on the UV frosted ink can realize the gold stamping effect at one time and directly stamp the surface of the UV frosted ink, endows printed matters with three-dimensional touch feeling, increases gold stamping metallic feeling and increases product competitiveness.
Further, in the step S300, the prepared gray gold stamping material is attached to a base film, and then the gray gold stamping material on the base film is stamped on the UV frosted ink by an automatic stamping machine. Namely, the iron dust gold stamping material is attached to the base film to serve as a back glue layer, the back glue layer is stamped on the UV frosted ink through the automatic stamping machine, and due to the fact that in the back glue layer, through improvement of the auxiliary agent, the viscosity of the back glue layer can be greatly improved by adopting the modified polyacrylic acid polyester polymer or the fatty acid modified polymer as the auxiliary agent, and the back glue layer can be stably combined with the surface of the UV frosted ink to form a whole.
Further, the amount of the auxiliary agent in the iron ash gold stamping material is 0.2-1% of that of the PET on the base film. For example, the adjuvant is used in an amount of 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1% of the PET on the base film. The additive with the proportion obviously prolongs the storage time of the adhesive tape after being added into the adhesive tape layer, and can reach the time length of more than 6 months.
Further, the UV frosted ink comprises 20% of frosted powder by mass, and the sum of the mass percentages of the components of the UV frosted ink is 100%. Specifically, when the usage amount of the frosting powder is 20%, the gravure frosting ink of the UV frosting ink has low viscosity, good frosting effect and optimal overall performance.
Further, in the step S100, the coating pressure when printing on the printing material is 80 to 90kg, for example, the coating pressure may be 80kg or 90 kg; the temperature is 100-120 ℃, for example, the temperature can be 100 ℃, 110 ℃ or 120 ℃; the production speed is 15-60 m/min, for example, the production speed can be 15m/min, 20m/min, 25m/min, 30m/min, 35m/min, 40m/min, 45m/min, 50m/min, 55m/min or 60 m/min.
Further, in the step S200, the screen mesh number used in the screen printing of the UV frosted ink is 300 meshes, the mercury lamp power is 12000W, and the light emission is 1000 ± 100mm, for example, the light emission may be 900mm, 1000mm, or 1100 mm; the power density pressure is 80-90 kg, and the power density pressure can be 80kg or 90 kg; the production speed is 400-500 locomotive/h, for example, the production speed can be 400 locomotive/h or 500 locomotive/h.
Further, in the step S300, a pressure axis used for ironing the iron ash gold material is 2.3 ± 0.5mm, for example, the pressure axis may be 1.8mm, 2mm, 2.3mm, 2.6mm or 2.8 mm; the temperature is 130 + -5 deg.C, and the temperature can be 125 deg.C, 130 deg.C, 135 deg.C; the production speed is 3000-4500 locomotive/h, for example, the production speed can be 3000 locomotive/h, 3500 locomotive/h, 4000 locomotive/h or 4500 locomotive/h.
Example two.
The difference between the present embodiment and the first embodiment is that the leveling agent comprises any one or a mixture of two or more of dike height 410, dike height 420 and dike height 450; the frosting powder is polypropylene.
The rest of this embodiment is the same as the first embodiment, and the unexplained features in this embodiment are explained by the first embodiment, which is not described herein again.
Example three.
The difference between the embodiment and the second embodiment is that the UV frosted ink comprises the following components in percentage by mass:
the rest of this embodiment is the same as the embodiment, and the unexplained features in this embodiment are explained by the embodiment one, which is not described herein again.
Example four.
The difference between the embodiment and the third embodiment is that the UV frosted ink comprises the following components in percentage by mass:
the rest of this embodiment is the same as the embodiment, and the unexplained features in this embodiment are explained by the first embodiment, which is not described again here.
The following tests were performed on color boxes processed by the process of the present invention.
First, adhesion test
Second, 2k Eraser test
Third, abrasion resistance test
The following experiments were conducted on relevant formulation parameters in the process of the present invention.
First, research and development of UV matte ink
Purpose of the experiment:
because this experiment is based on that iron dust gold stamping material directly scalds on dull polish UV printing ink, so carry out the experiment on current dull polish UV printing ink, verify through the experiment that control UV dull polish printing ink viscosity is suitable, strengthen surface tension, improve printing ink adhesive force.
Experimental materials:
prepolymer: hyperbranched polyester acrylate, aliphatic polyurethane acrylate, epoxy acrylate;
monomer (b): ethoxyethoxyethyl acrylate, 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate, neopentyl glycol diacrylate, dipropylene glycol diacrylate, trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate;
photoinitiator (2): 1-hydroxycyclohexylacetophenone, phenylbis (2,4, 6-trimethylbenzoyl) phosphine oxide yellow crystals, thiophenyl-p-oxazacyclopropanone, isopropylthioxanthone, acrylic acid, 2-ethylhexyl ester;
auxiliary agent: flatting agent, dispersant, defoamer, adhesion promoter and wear-resistant auxiliary agent (SiO2, talcum powder and the like);
sanding powder: special fluorinated polyethylene wax and polypropylene.
Experimental equipment:
a mechanical stirrer, a Fusion ultraviolet curing machine, an infrared spectrometer, a RK K303 MULTICOATER type coating machine, an IGT F1 type printability tester and a KRUSS K100 full-automatic surface tension tester.
The preparation method comprises the following steps:
the UV frosted ink does not contain pigment, so that the processes of grinding, dispersing and the like of the pigment are not needed, proper prepolymer, monomer, photoinitiator and auxiliary agent are selected according to the preliminary formula design, the photoinitiator is firstly dissolved in the monomer according to a certain proportion (water bath constant temperature heating and pre-stirring for a period of time), the prepolymer, the auxiliary agent, frosted powder and the like are added according to the proportion, the mixture is placed on a mechanical high-speed stirrer, stirred for 30 minutes, fully and uniformly stirred, and kept stand for a period of time, and the prepared UV frosted ink is obtained after the system is stabilized.
The experimental method comprises the following steps:
experiments are grouped according to the formula, and because the influence factor of controlling the adhesive force of the UV ink is mainly the wear-resistant additive and the main factor of controlling the viscosity of the ink is the crosslinking additive, four groups of experiments are set by adopting a single variable method. Respectively as follows: the first group of experiments take the types of the wear-resistant additives as variables, and the wear-resistant agent with the best performance is selected through experimental verification. The second group of experiments take the dosage of the wear-resistant additive as a variable, and the best dosage of the components is verified through experiments. In the third group of experiments, the wear-resistant agent with the best performance is selected through experimental verification by taking the type of the crosslinking assistant as a variable. The fourth group of experiments take the dosage of the crosslinking assistant as a variable, and the best dosage of the components is verified through experiments.
And (3) testing results:
the first set of experiments:
as shown in connection with fig. 1.
The second set of experiments:
as shown in connection with fig. 2.
The third set of experiments:
as shown in connection with fig. 3.
Fourth set of experiments:
as shown in connection with fig. 4.
And (4) experimental conclusion:
1. the adhesive force of the ink can be remarkably improved by adding the cross-linking type siloxane polyether acrylate auxiliary agent, and the adhesive force of the UV gravure frosted ink is optimal when the consumption of the auxiliary agent is 1%;
2. the wear-resistant auxiliary agent is a nanotechnology type fluorine-silicon compound, so that the wear resistance of the UV gravure frosted ink can be effectively improved, and the optimal using amount of the wear-resistant auxiliary agent is 1%;
3. the type and the quantity of dull polish powder play decisive effect to the dull polish effect of UV gravure dull polish printing ink, polymer type polypropylene dull polish powder stable performance, and the printing ink sample dull polish of easy dispersion preparation is effectual, roughness is big, smoothness degree is little, and UV gravure dull polish printing ink viscosity is low when the dull polish powder quantity is 20%, and dull polish is effectual, and the wholeness can the best.
Finally, the obtained component configuration table is as follows:
the UV frosted ink comprises the following components in percentage by mass:
the hyperbranched polyester acrylate accounts for 6.33 percent, and the production place is US cyanote;
the aliphatic polyurethane is 12.46 percent, and the production place is American cyanite;
9.21% of aliphatic acrylic acid-acrylate copolymer, and the origin is Guangdong in China;
the 1, 6-hexanediol diacrylate is 19.32 percent, and the production place is Tianjin Tianjiao chemical industry;
tripropylene glycol diacrylate is 22.68 percent, and the production area is Tianjin Tianjiao chemical industry;
3.4% of thiophenyl-p-oxazepine, and the appearance was white powder;
1.6 percent of isopropyl thioxanthone and light yellow powder in appearance;
1% of defoaming agent and 1% of digao auxiliary agent in the production place;
2% of digao 410 and a digao auxiliary agent in a production place;
the digao 420 is 1 percent, and the producing area is digao auxiliary agent;
the digao 450 is 0.5 percent, and the producing area is digao auxiliary agent;
0.5% of dispersant and BYK in origin;
20% of polypropylene and 20% of origin in the chemical industry of Xuancheng, Guangdong province.
Second, grinding iron gray gold stamping material
Experimental materials:
a basal membrane (a non-corona treated PET film with the thickness of 15 mu m is selected), a parting agent (wax and silicon resin are used as main bodies), alumite, an adhesive layer (hot melt adhesive), a back glue layer (acrylic acid and methacrylic acid are analytical pure reagents of a chemical reagent factory of Syngnathic Kellon, butyl acrylate, hydroxyethyl acrylate and methyl methacrylate are all polymerization-grade industrial products, butanone and ethyl acetate are analytical pure reagents of Guangdong Guanghua science and technology Limited company, azodiisobutyronitrile is re-refined as an industrial-grade product, and auxiliary agents such as a leveling agent, an adhesion promoter and the like are all industrial products.)
Purpose of the experiment:
because the surface tension of the paper is different from the surface tension of the UV frosted ink, the adhesion force of the gold stamping material is mainly improved in the experiment, and the back adhesive layer which has great influence on the adhesion force of the gold stamping material is selected in the experiment to improve the experiment, so that the gold stamping material can be directly scalded on the surface of the frosted UV ink.
An experimental instrument:
a constant speed stirrer, a constant temperature water bath, a Turkey viscometer, a small-sized gold stamping machine F-300-1, 101-1AS drying box and an industrial alumite gum coating machine.
The preparation process comprises the following steps:
1. a prepolymerization stage: firstly, adding a proper solvent and a part of monomers into a three-neck flask, then adding an initiator accounting for 0.3-1.5% of the mass of the monomers, introducing nitrogen, and heating while stirring. And (3) heating the water bath kettle to 70-75 ℃, and finishing the prepolymerization of the base material after the reaction lasts for 30 minutes.
2. Dropwise adding reaction stage: mixing the rest of the monomer and part of the solvent together to be used as dropping material; and mixing part of the solvent with an initiator accounting for 0.3-1.5% of the mass of the dropwise added monomer, and taking the mixture as an initiator solution after complete dissolution. And controlling the water bath temperature to be 73-75 ℃, simultaneously dripping the dripping material and the initiator solution into the prepolymerization material in the first step, controlling the dripping time to be 1-2 hours, observing reflux, controlling the reaction temperature, and preventing violent heat release.
3. And (3) a heat preservation stage: and after the second step of dripping is finished, controlling the temperature of the water bath at 75-78 ℃, directly adding an initiator, carrying out reaction and heat preservation for 3 hours, observing the change of the viscosity of the polymer, and preventing climbing or sudden polymerization.
4. A dilution stage: adding the rest solvent into a reaction flask while stirring, adjusting the solid content of the resin to be about 40%, controlling the water bath temperature to be 70 ℃, and mixing the rest monomer and part of the solvent together as dropping materials when the polymerization resin is stirred uniformly; and mixing part of the solvent with an initiator accounting for 0.3-1.5% of the mass of the dropwise added monomer, and taking the mixture as an initiator solution after complete dissolution. And controlling the water bath temperature to be 73-75 ℃, simultaneously dripping the dripping material and the initiator solution into the prepolymerization material in the first step, controlling the dripping time to be 1-2 hours, observing reflux, controlling the reaction temperature, and preventing violent heat release.
And (4) experimental conclusion:
the two dispersants respectively account for 0.2-1% of the resin, the storage time of the resin is obviously prolonged to be more than 6 months after the resin is added into the back adhesive, the Efka 100 is a modified polyacrylic polyester polymer, the Efka 150 is a fatty acid modified polymer, and the adverse effect of the Efka 100 on the adhesive force of the back adhesive is smaller than that of the Efka 150, so that the Efka is preferably selected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.