CN112457711A - Environment-friendly gravure reverse glazing gloss oil and preparation method thereof - Google Patents
Environment-friendly gravure reverse glazing gloss oil and preparation method thereof Download PDFInfo
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- 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
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- 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
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Abstract
The invention discloses an environment-friendly gravure reverse glazing gloss oil and a preparation method thereof, wherein the environment-friendly gravure reverse glazing gloss oil consists of reverse aqueous base oil and reverse UV (ultraviolet) surface oil, and the reverse aqueous base oil comprises the following components in percentage by mass: 70-80% of film-forming resin, 2-5% of cosolvent, 10-15% of deionized water, 1-2% of defoaming agent, 2-8% of wetting agent and 1-5% of flatting agent, wherein the total mass percentage is 100%; the reverse UV surface oil comprises the following components in percentage by mass: 80-85% of connecting material, 4-8% of auxiliary initiator, 5-9% of photoinitiator, 0.1-0.2% of stabilizer, 1-2% of smoothing agent and 1-2% of auxiliary agent, wherein the total mass percentage is 100%. The water-based ink replaces UV ink, so that a high-quality reverse glazing effect is achieved.
Description
Technical Field
The invention belongs to the technical field of printing, and particularly relates to environment-friendly gravure reverse glazing gloss oil and a preparation method thereof.
Background
The traditional reverse glazing process is combined printing by reverse UV base oil and reverse UV surface oil, the surface energy difference after the printing of the UV base oil and the UV surface oil is superposed to form cohesive reaction, so that contact areas printed by the UV base oil and the UV surface oil generate mutual exclusion to form transparent and uniform but non-highlight wrinkles to show a leather effect, and non-contact areas show a high-gloss mirror surface effect.
The traditional gloss oil is generally aqueous light, UV coating light and UV reverse light, but all have inherent defects. The water-based light and the common UV coated gloss paper can present a mirror effect, and the UV reverse light can present a special leather effect, but the two sets of inherent UV printing characteristics increase the risk of UV yellowing and the defect of ozone release during the photopolymerization reaction of the UV gloss oil.
The traditional reverse glazing process is two-pass UV printing, and has the following defects: firstly, the requirement on printing equipment is high, a double-UV drying color group is required, and the energy consumption is far greater than that of common hot air drying; secondly, the UV gloss oil inevitably has yellowing characteristic, which affects the appearance hue of the printed product; third, the cost of UV varnish is generally 2 to 3 times higher than aqueous varnish; fourth, UV-based inks have a smell greater than aqueous inks, are more complex in volatile components, and are less environmentally friendly than aqueous inks.
Disclosure of Invention
In view of the above, the present invention provides an environment-friendly reverse gravure polishing varnish and a preparation method thereof, wherein the water-based ink replaces UV ink to achieve a higher quality reverse polishing effect.
In order to solve the technical problem, the invention discloses environment-friendly gravure reverse glazing gloss oil which comprises reverse aqueous base oil and reverse UV (ultraviolet) surface oil, wherein the reverse aqueous base oil comprises the following components in percentage by mass: 70-80% of film-forming resin, 2-5% of cosolvent, 10-15% of deionized water, 1-2% of defoaming agent, 2-8% of wetting agent and 1-5% of flatting agent, wherein the total mass percentage is 100%; the reverse UV surface oil comprises the following components in percentage by mass: 80-85% of connecting material, 4-8% of auxiliary initiator, 5-9% of photoinitiator, 0.1-0.2% of stabilizer, 1-2% of smoothing agent and 1-2% of auxiliary agent, wherein the total mass percentage is 100%.
Optionally, the film-forming resin is formed by mixing 45-75 parts by mass of styrene-acrylic copolymer and 15-25 parts by mass of acrylic copolymer emulsion.
Optionally, the cosolvent is one or two of industrial alcohol and isopropanol; the deionized water is industrial deionized water or distilled water.
Optionally, the defoaming agent is a mixture of metal salt, mineral oil, emulsifier and high molecular derivative; the wetting agent is anionic surfactant such as sodium diisooctyl succinate sulfonate; the leveling agent is selected from one of polydimethylsiloxane, polymethylphenylsiloxane and acrylate.
Optionally, the binder is formed by mixing 25 to 30 parts by mass of tripropylene glycol diacrylate, 25 to 30 parts by mass of trimethylolpropane triacrylate and 30 to 35 parts by mass of an acrylate copolymer.
Optionally, the coinitiator is diethanolamine; the photoinitiator is one or a mixture of more of benzophenone derivative polymer and (2,4, 6-trimethylbenzoyl) diphenyl phosphine oxide (TPO); the stabilizer is p-hydroxyanisole; the smoothing agent is polydimethylsiloxane; the auxiliary agent is microcrystalline wax to control the gloss effect.
The invention also discloses a preparation method of the environment-friendly gravure reverse glazing gloss oil, which comprises the following steps:
step 1, preparing reverse water-based base oil;
step 2, preparing reverse UV surface oil;
and 3, separately storing the prepared reverse water-based base oil and reverse UV surface oil.
Optionally, the preparation of the reverse aqueous base oil in the step 1 specifically comprises:
step 1.1, weighing the following components in percentage by mass: 70-80% of film-forming resin, 2-5% of cosolvent, 10-15% of deionized water, 1-2% of defoaming agent, 2-8% of wetting agent and 1-5% of flatting agent, wherein the total mass percentage is 100%;
step 1.2, dispersing the film-forming resin uniformly under the rotation speed condition of 1200-1800rpm/min to obtain a primary mixture A;
step 1.3, adding a cosolvent and deionized water into the primary mixture A, adding a defoaming agent after uniformly stirring, adding a wetting agent after stirring for a period of time, stirring for 20-40min at the rotating speed of 1800-plus 2200rpm, adjusting the rotating speed to 300-plus 500rpm, adding a leveling agent after slowly defoaming, filtering by a sample sieve after uniformly stirring, and standing for a period of time to obtain the reverse water-based base oil which is a milky semitransparent fluid.
Optionally, the preparation of the reverse UV finish oil in the step 2 specifically comprises:
step 2.1, mixing the binder and the auxiliary initiator according to the proportion and uniformly stirring to obtain a primary mixture B;
and 2.2, heating the photoinitiator to be fully dissolved, adding the photoinitiator into the primary mixture B, adding the stabilizer, the smoothing agent and the auxiliary agent to disperse for 25-35min to obtain the reverse UV face oil, wherein the obtained reverse UV face oil is beige semitransparent fluid.
Compared with the prior art, the invention can obtain the following technical effects:
1) the novel environment-friendly online gravure reverse gloss oil disclosed by the invention has the advantages that the proportion of film forming resin and auxiliary agent in the formula is adjusted, so that the reverse aqueous base oil has excellent printing adaptability, and in addition, the advantages of high curing speed of epoxy acrylic resin and multifunctional urethane acrylate of the reverse UV gloss oil are combined, so that the contact area of the epoxy acrylic resin and the multifunctional urethane acrylate after printing generates mutual exclusion to form transparent and uniform wrinkles, a leather effect is shown, and a non-contact area shows a high-gloss mirror surface effect, which cannot be realized by the traditional UV reverse gloss oil.
2) The invention reduces the requirements on the components of the compounds, namely converts chemical reaction into physical reaction to the maximum extent, reduces the dependence of UV gloss oil by 50 percent, reduces the discharge of harmful volatile compounds and greatly enhances the environmental protection performance. In particular, the manufacturing cost of the water-based base oil is far lower than that of the UV base oil. In conclusion, the invention is more suitable for mass production in terms of environmental protection, cost and control difficulty.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
Drawings
The accompanying drawings, which are included to provide a further understanding 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 invention and not to limit the invention. In the drawings:
FIG. 1 is a comparison graph of reverse gloss effect under different printing plate parameters by applying the reverse gloss oil and the reverse gloss method provided by the present invention; wherein a represents a plate depth of 19 μm, and b represents a plate depth of 29 μm;
FIG. 2 shows the leather effect and mirror effect of the reverse gloss oil and the reverse gloss method provided by the present invention.
Detailed Description
The following embodiments are described in detail with reference to the accompanying drawings, so that how to implement the technical features of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented.
The invention discloses an environment-friendly gravure reverse glazing gloss oil which is composed of reverse aqueous base oil and reverse UV surface oil, wherein the reverse aqueous base oil comprises the following components in percentage by mass: 70-80% of film-forming resin, 2-5% of cosolvent, 10-15% of deionized water, 1-2% of defoaming agent, 2-8% of wetting agent and 1-5% of flatting agent, wherein the total mass percentage is 100%.
Wherein the film-forming resin is formed by mixing 45-75 parts of styrene-acrylic copolymer and 15-25 parts of acrylate copolymer emulsion according to the mass part; the non-contact area of the base oil and the surface oil is the independent coating part of the base oil, and the film-forming resin forms a high-gloss mirror surface effect after forming a film.
The cosolvent is one or two of industrial alcohol and isopropanol; the cosolvent has the functions of adjusting the viscosity of the gloss oil, adjusting the drying speed, improving the wettability of the printing surface and the like, ensuring that the gloss oil has certain fluidity, smoothly realizing transfer in the printing process, reducing the surface tension of the ink and helping the leveling of the ink. If the amount of the gloss oil is excessive, the gloss oil is easy to dry quickly and paste during the printing process; if the amount of the additive is insufficient, the printed matter will be dried poorly and the gloss will be affected.
The deionized water is industrial deionized water or distilled water, and the deionized water is used for adjusting the viscosity and the fluidity of the gloss oil, so that the transfer can be smoothly realized in the gloss oil printing process, and the leveling of the gloss oil is facilitated; if the amount of the surfactant is excessively used, the fluidity is too high, and the generation of water marks and the like is caused. If the amount of addition is insufficient, the ink transfer fluidity is poor, and the surface flatness is impaired.
The defoaming agent is one or more of metal salt, mineral oil, emulsifier and high molecular derivative, and has the functions of eliminating and inhibiting bubbles generated when the gloss oil meets air in the circulating or stirring process and enhancing the stability of the gloss oil state. If the amount of the varnish is excessively used, a varnish shrinkage problem is generated, and spreading of varnish on paper is influenced. If the amount of addition is insufficient, the effect of suppressing the generation of photo gas bubbles for a long period of time cannot be achieved.
The wetting agent is anionic surfactant such as dioctyl sodium sulfosuccinate, and the wetting agent is used for improving the wettability of the gloss oil to paper. When the amount of the gloss oil is excessively used, bubbles are easily generated in the gloss oil; if the amount of the additive is not sufficient, a good wetting effect cannot be obtained.
The leveling agent is selected from one of polydimethylsiloxane, polymethylphenylsiloxane and acrylate, and has the function of improving the wettability of the gloss oil on paper and enabling the gloss oil to still keep a good spreading effect when the surface energy of the paper is unstable. When the amount of the gloss oil is excessively used, bubbles are easily generated in the gloss oil; if the amount of addition is insufficient, a good spreading effect cannot be obtained.
The reverse UV surface oil comprises the following components in percentage by mass: 80-85% of connecting material, 4-8% of auxiliary initiator, 5-9% of photoinitiator, 0.1-0.2% of stabilizer, 1-2% of smoothing agent and 1-2% of auxiliary agent, wherein the total mass percentage is 100%.
The connecting material is prepared by mixing 25-30 parts of tripropylene glycol diacrylate, 25-30 parts of trimethylolpropane triacrylate and 30-35 parts of acrylate copolymer in parts by mass. The composition proportion of the connecting material determines the viscosity, hardness, flexibility, glossiness and dryness of the reverse UV face oil, and the main performance of the reverse UV face oil film forming is determined by the connecting material. After the base oil and the surface oil are printed, the contact area of the base oil and the surface oil generates cohesive reaction due to the film-forming resin and the components in the surface oil, so that mutual exclusion is generated to form transparent and uniform wrinkled small particles, and a cortical effect is presented.
The auxiliary initiator is diethanol amine, the auxiliary initiator is used for drying the reverse UV face oil to form a film under the irradiation of a UV lamp in cooperation with a photoinitiator, if the reverse UV face oil is excessively used, the film forming performance of the reverse UV face oil is poor, and if the addition amount is insufficient, the drying is poor, and the printed product is sticky.
The photoinitiator is one or a mixture of more of benzophenone derivative polymer and (2,4, 6-trimethylbenzoyl) diphenyl phosphine oxide (TPO). The photoinitiator has the function of drying the reverse UV face oil into a film under the irradiation of a UV lamp by matching with an auxiliary initiator, and if the photoinitiator is excessively used, the reverse face oil cannot be used due to precipitation of the photoinitiator. If the addition amount of the photoinitiator is insufficient, the reverse UV face oil is poor in drying, and the printed product is sticky.
The stabilizer is p-hydroxyanisole. The stabilizer acts to prevent direct polymerization of the ink. If used in excess, the inverse UV finish dries imperviously. If the amount of the surfactant is not sufficient, the reverse surface oil is gelled and agglomerated, and thus the surfactant cannot be used.
The smoothing agent is polydimethylsiloxane. The smoothing agent has the functions of improving the leveling performance of the reverse face oil and reducing the surface friction coefficient of a printing product. If the amount of the lubricating oil is excessive, the lubricating oil is reversely leveled, bubbles appear on the reverse surface oil after the lubricating oil is installed on a machine, and the friction coefficient is low. If the addition amount is not enough, the reverse surface oil has poor leveling property and the friction coefficient is higher.
The auxiliary agent is microcrystalline wax to control the gloss effect. The auxiliary agent controls the gloss effect of the reverse UV face oil, and can reduce the surface friction coefficient of the printing product. If the auxiliary agent is used excessively, the printed product has strong luster, transparent appearance and low friction coefficient. If the addition amount of the auxiliary is insufficient, the shrinkage effect of the reverse face oil is poor, and the friction coefficient is higher.
The invention also discloses a preparation method of the environment-friendly gravure reverse glazing gloss oil, which comprises the following steps:
step 1, dispersing the film-forming resin uniformly at the rotation speed of 1200-1800rpm/min to obtain a primary mixture A;
step 2, adding a cosolvent and deionized water into the primary mixture A, adding a defoaming agent after uniformly stirring, adding a wetting agent after stirring for a period of time, stirring for 20-40min under the condition of the rotating speed of 1800 plus materials and 2200rpm/min, adjusting the rotating speed to 300 plus materials and 500rpm/min, adding a flatting agent after slowly defoaming, filtering by using a sample separating sieve after uniformly stirring, and standing for a period of time to obtain the reverse water-based base oil, wherein the obtained reverse water-based base oil is a milky semitransparent fluid;
step 3, mixing the binder and the initiator aid in proportion and uniformly stirring to obtain a primary mixture B;
and 4, heating and fully dissolving the photoinitiator, adding the photoinitiator into the primary mixture B, adding the stabilizer, the smoothing agent and the auxiliary agent, and dispersing for 25-35min to obtain the reverse UV face oil, wherein the obtained reverse UV face oil is beige semitransparent fluid.
The reverse water-based base oil provided by the invention can be used for printing on a rotary gravure press with common hot air drying, and has good leveling property, adhesive force and film-forming property; the reverse UV face oil provided by the invention has good adhesive force, wear resistance and flexibility, and can play a good protection role on printed matters. When the reverse water-based base oil and the reverse UV surface oil are overprinted, a special leather effect can be formed in a contact area, and a very good packaging finishing effect is achieved. And the reverse water-based base oil and the reverse UV surface oil are in a non-contact area, so that a specular effect with high optical efficiency can be formed. The two different textures and visual effects form obvious level contrast, and generate exquisite and unique decorative functions.
Example 1
The environment-friendly gravure reverse glazing gloss oil consists of reverse aqueous base oil and reverse UV (ultraviolet) surface oil, wherein the reverse aqueous base oil comprises the following components in percentage by mass: 76% of film-forming resin, 5% of cosolvent, 10% of deionized water, 2% of defoaming agent, 2% of wetting agent and 5% of flatting agent, wherein the total mass percentage is 100%.
Wherein the film-forming resin is formed by mixing 60 parts of styrene-acrylic copolymer and 20 parts of acrylate copolymer emulsion according to the mass parts; the non-contact area of the base oil and the surface oil is the independent coating part of the base oil, and the film-forming resin forms a high-gloss mirror surface effect after forming a film.
The cosolvent is industrial alcohol.
The deionized water is industrial deionized water.
The defoaming agent is a mixture of metal salt, mineral oil, emulsifier and high molecular derivative.
The wetting agent is sodium diisooctyl succinate sulfonate.
The leveling agent is selected from polydimethylsiloxane.
The reverse UV surface oil comprises the following components in percentage by mass: 83.8 percent of connecting material, 8 percent of auxiliary initiator, 5 percent of photoinitiator, 0.2 percent of stabilizer, 2 percent of smoothing agent and 1 percent of auxiliary agent, wherein the total mass percent is 100 percent.
The connecting material is prepared by mixing 28 parts by mass of tripropylene glycol diacrylate, 28 parts by mass of trimethylolpropane triacrylate and 32 parts by mass of an acrylate copolymer. After the base oil and the surface oil are printed, the contact area of the base oil and the surface oil generates cohesive reaction due to the film-forming resin and the components in the surface oil, so that mutual exclusion is generated to form transparent and uniform wrinkled small particles, and a cortical effect is presented.
The coinitiator is diethanolamine.
The photoinitiator is one or a mixture of more of benzophenone derivative polymer and (2,4, 6-trimethylbenzoyl) diphenyl phosphine oxide (TPO).
The stabilizer is p-hydroxyanisole.
The smoothing agent is polydimethylsiloxane.
The auxiliary agent is microcrystalline wax to control the gloss effect.
The preparation method of the environment-friendly gravure reverse glazing gloss oil comprises the following steps:
step 1, dispersing film-forming resin uniformly at a rotating speed of 1500rpm/min to obtain a primary mixture A;
step 2, adding a cosolvent and deionized water into the primary mixture A, adding a defoaming agent after uniformly stirring, adding a wetting agent after stirring for a period of time, stirring for 30min at the rotating speed of 2000rpm/min, adjusting the rotating speed to 400rpm/min, adding a leveling agent after slowly defoaming, filtering by using a sample sieve after uniformly stirring, and standing for a period of time to obtain the reverse water-based base oil, wherein the obtained reverse water-based base oil is a milky semitransparent fluid;
step 3, mixing the binder and the initiator aid in proportion and uniformly stirring to obtain a primary mixture B;
and 4, heating and fully dissolving the photoinitiator, adding the photoinitiator into the primary mixture B, adding the stabilizer, the smoothing agent and the auxiliary agent, and dispersing for 30min to obtain the reverse UV face oil, wherein the obtained reverse UV face oil is beige semitransparent fluid.
Example 2
The environment-friendly gravure reverse glazing gloss oil consists of reverse aqueous base oil and reverse UV (ultraviolet) surface oil, wherein the reverse aqueous base oil comprises the following components in percentage by mass: 70% of film-forming resin, 2% of cosolvent, 15% of deionized water, 1% of defoaming agent, 8% of wetting agent and 4% of flatting agent, wherein the total mass percentage is 100%.
Wherein the film-forming resin is formed by mixing 45 parts of styrene-acrylic copolymer and 25 parts of acrylate copolymer emulsion according to the mass parts; the non-contact area of the base oil and the surface oil is the independent coating part of the base oil, and the film-forming resin forms a high-gloss mirror surface effect after forming a film.
The cosolvent is isopropanol.
The deionized water is distilled water.
The defoaming agent is a mixture of metal salt, mineral oil, emulsifier and high molecular derivative.
The wetting agent is sodium diisooctyl succinate sulfonate.
The leveling agent is selected from acrylic ester.
The reverse UV surface oil comprises the following components in percentage by mass: 85% of connecting material, 4% of auxiliary initiator, 7.9% of photoinitiator, 0.1% of stabilizer, 1% of smoothing agent and 2% of auxiliary agent, wherein the total mass percentage is 100%.
The connecting material is prepared by mixing 25 parts by mass of tripropylene glycol diacrylate, 30 parts by mass of trimethylolpropane triacrylate and 30 parts by mass of an acrylate copolymer. After the base oil and the surface oil are printed, the contact area of the base oil and the surface oil generates cohesive reaction due to the film-forming resin and the components in the surface oil, so that mutual exclusion is generated to form transparent and uniform wrinkled small particles, and a cortical effect is presented.
The coinitiator is diethanolamine.
The photoinitiator (2,4, 6-trimethylbenzoyl) diphenylphosphine oxide (TPO).
The stabilizer is p-hydroxyanisole.
The smoothing agent is polydimethylsiloxane.
The auxiliary agent is microcrystalline wax to control the gloss effect.
The preparation method of the environment-friendly gravure reverse glazing gloss oil comprises the following steps:
step 1, dispersing film-forming resin uniformly at a rotation speed of 1200rpm/min to obtain a primary mixture A;
step 2, adding a cosolvent and deionized water into the primary mixture A, adding a defoaming agent after uniformly stirring, adding a wetting agent after stirring for a period of time, stirring for 20min at the rotating speed of 2200rpm/min, adjusting the rotating speed to 500rpm/min, adding a leveling agent after slowly defoaming, filtering by using a sample sieve after uniformly stirring, and standing for a period of time to obtain the reverse water-based base oil, wherein the obtained reverse water-based base oil is a milky semitransparent fluid;
step 3, mixing the binder and the initiator aid in proportion and uniformly stirring to obtain a primary mixture B;
and 4, heating and fully dissolving the photoinitiator, adding the photoinitiator into the primary mixture B, adding the stabilizer, the smoothing agent and the auxiliary agent, and dispersing for 25min to obtain the reverse UV face oil, wherein the obtained reverse UV face oil is beige semitransparent fluid.
Example 3
The environment-friendly gravure reverse glazing gloss oil consists of reverse aqueous base oil and reverse UV (ultraviolet) surface oil, wherein the reverse aqueous base oil comprises the following components in percentage by mass: 80% of film-forming resin, 2% of cosolvent, 12% of deionized water, 2% of defoaming agent, 3% of wetting agent and 1% of flatting agent, wherein the total mass percentage is 100%.
Wherein the film-forming resin is formed by mixing 75 parts of styrene-acrylic copolymer and 15 parts of acrylate copolymer emulsion according to the mass parts; the non-contact area of the base oil and the surface oil is the independent coating part of the base oil, and the film-forming resin forms a high-gloss mirror surface effect after forming a film.
The cosolvent is isopropanol.
The deionized water is industrial deionized water.
The defoaming agent is a mixture of metal salt, mineral oil, emulsifier and high molecular derivative.
The wetting agent is sodium diisooctyl succinate sulfonate.
The leveling agent is selected from polymethylphenylsiloxane.
The reverse UV surface oil comprises the following components in percentage by mass: 80% of connecting material, 6.8% of auxiliary initiator, 9% of photoinitiator, 0.2% of stabilizer, 2% of smoothing agent and 2% of auxiliary agent, wherein the total mass percentage is 100%.
The connecting material is prepared by mixing 30 parts by mass of tripropylene glycol diacrylate, 25 parts by mass of trimethylolpropane triacrylate and 35 parts by mass of an acrylate copolymer. After the base oil and the surface oil are printed, the contact area of the base oil and the surface oil generates cohesive reaction due to the film-forming resin and the components in the surface oil, so that mutual exclusion is generated to form transparent and uniform wrinkled small particles, and a cortical effect is presented.
The coinitiator is diethanolamine.
The photoinitiator is a polymer of a benzophenone derivative.
The stabilizer is p-hydroxyanisole.
The smoothing agent is polydimethylsiloxane.
The auxiliary agent is microcrystalline wax to control the gloss effect.
The preparation method of the environment-friendly gravure reverse glazing gloss oil comprises the following steps:
step 1, dispersing film-forming resin uniformly at the rotation speed of 1800rpm/min to obtain a primary mixture A;
step 2, adding a cosolvent and deionized water into the primary mixture A, adding a defoaming agent after uniformly stirring, adding a wetting agent after stirring for a period of time, stirring for 40min at the rotation speed of 1800rpm/min, adjusting the rotation speed to 300rpm/min, adding a leveling agent after slowly defoaming, filtering by using a sample sieve after uniformly stirring, and standing for a period of time to obtain the reverse water-based base oil, wherein the obtained reverse water-based base oil is a milky semitransparent fluid;
step 3, mixing the binder and the initiator aid in proportion and uniformly stirring to obtain a primary mixture B;
and 4, heating and fully dissolving the photoinitiator, adding the photoinitiator into the primary mixture B, adding the stabilizer, the smoothing agent and the auxiliary agent, and dispersing for 35min to obtain the reverse UV face oil, wherein the obtained reverse UV face oil is beige semitransparent fluid.
The environment-friendly gravure reverse glazing gloss oil prepared in the embodiment 1-3 is adopted for printing: the reverse glazing mode provided by the invention comprises the following steps: one-pass UV gloss oil and one-pass water-based gloss oil are overprinted, and the water-based base oil is dried without a UV lamp, so that 3 UV lamps are required for drying, and various coated papers or various cardboards (white cardboards, gold and silver cardboards or PET transfer cardboards and the like) with smooth surfaces and dyne values of more than 36 are selected. When the plate making document is made, the leather effect part is an overprinting area of the base oil and the surface oil, and the mirror effect part is an independent base oil coating area. The thickness of the cortex effect can be controlled by adjusting the parameters of the printing plate; as shown in fig. 1. The reverse water-based base oil and the reverse UV surface oil are coated on the paper or the printing semi-finished product, so that an ideal reverse light effect can be obtained, the leather effect and the mirror surface effect of the reverse light oil and the reverse glazing mode provided by the invention are shown in figure 2, and the specific process parameters are shown in the following table 1.
Table 1 technical effects of the eco-friendly gravure reverse glazing gloss oil prepared in examples 1 to 3
As can be seen from table 1, the reverse aqueous base oil and the reverse UV top oil of the present invention can obtain a very desirable cortical effect after overprinting, and the cortical effects of the thickness, uniformity and gloss after overprinting can be directly affected by the content of the film-forming resin in the reverse aqueous base oil formulation and the content of the binder in the reverse UV top oil formulation under the premise of a certain printing plate parameter.
The traditional reverse upward formula: the UV light oil is overprinted twice, and the UV lamp required for drying is 3+3 ═ 6, so that the dependence of the UV light oil is reduced by 50% compared with the traditional reverse upward mode.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The environment-friendly gravure reverse glazing gloss oil is characterized by comprising reverse aqueous base oil and reverse UV surface oil, wherein the reverse aqueous base oil comprises the following components in percentage by mass: 70-80% of film-forming resin, 2-5% of cosolvent, 10-15% of deionized water, 1-2% of defoaming agent, 2-8% of wetting agent and 1-5% of flatting agent, wherein the total mass percentage is 100%; the reverse UV surface oil comprises the following components in percentage by mass: 80-85% of connecting material, 4-8% of auxiliary initiator, 5-9% of photoinitiator, 0.1-0.2% of stabilizer, 1-2% of smoothing agent and 1-2% of auxiliary agent, wherein the total mass percentage is 100%.
2. The eco-friendly gravure reverse glazing oil as claimed in claim 1, wherein the film forming resin is composed of 45 to 75 parts by mass of styrene-acrylic copolymer and 15 to 25 parts by mass of acrylic copolymer emulsion by mixing.
3. The environment-friendly gravure reverse glazing oil as claimed in claim 1, wherein the cosolvent is one or two of industrial alcohol and isopropanol; the deionized water is industrial deionized water or distilled water.
4. The eco-friendly gravure reverse glazing oil as set forth in claim 1, wherein the defoaming agent is a mixture of a metal salt, a mineral oil, an emulsifier and a polymer derivative; the wetting agent is anionic surfactant such as sodium diisooctyl succinate sulfonate; the leveling agent is selected from one of polydimethylsiloxane, polymethylphenylsiloxane and acrylate.
5. The eco-friendly gravure reverse glazing oil as claimed in claim 1, wherein the binder is prepared by mixing 25 to 30 parts by mass of tripropylene glycol diacrylate, 25 to 30 parts by mass of trimethylolpropane triacrylate, and 30 to 35 parts by mass of an acrylate copolymer.
6. The eco-friendly gravure reverse glazing oil as claimed in claim 1, wherein the co-initiator is diethanolamine; the photoinitiator is one or a mixture of more of benzophenone derivative polymer and (2,4, 6-trimethylbenzoyl) diphenyl phosphine oxide (TPO); the stabilizer is p-hydroxyanisole; the smoothing agent is polydimethylsiloxane; the auxiliary agent is microcrystalline wax to control the gloss effect.
7. The preparation method of the environment-friendly gravure reverse glazing gloss oil is characterized by comprising the following steps of:
step 1, preparing reverse water-based base oil;
step 2, preparing reverse UV surface oil;
and 3, separately storing the prepared reverse water-based base oil and reverse UV surface oil.
8. The environment-friendly gravure reverse glazing oil according to claim 1, wherein the reverse aqueous base oil prepared in the step 1 is specifically:
step 1.1, weighing the following components in percentage by mass: 70-80% of film-forming resin, 2-5% of cosolvent, 10-15% of deionized water, 1-2% of defoaming agent, 2-8% of wetting agent and 1-5% of flatting agent, wherein the total mass percentage is 100%;
step 1.2, dispersing the film-forming resin uniformly under the rotation speed condition of 1200-1800rpm/min to obtain a primary mixture A;
step 1.3, adding a cosolvent and deionized water into the primary mixture A, adding a defoaming agent after uniformly stirring, adding a wetting agent after stirring for a period of time, stirring for 20-40min at the rotating speed of 1800-plus 2200rpm, adjusting the rotating speed to 300-plus 500rpm, adding a leveling agent after slowly defoaming, filtering by a sample sieve after uniformly stirring, and standing for a period of time to obtain the reverse water-based base oil which is a milky semitransparent fluid.
9. The eco-friendly gravure reverse glazing oil as claimed in claim 1, wherein the reverse UV finish oil prepared in the step 2 is specifically:
step 2.1, mixing the binder and the auxiliary initiator according to the proportion and uniformly stirring to obtain a primary mixture B;
and 2.2, heating the photoinitiator to be fully dissolved, adding the photoinitiator into the primary mixture B, adding the stabilizer, the smoothing agent and the auxiliary agent to disperse for 25-35min to obtain the reverse UV face oil, wherein the obtained reverse UV face oil is beige semitransparent fluid.
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Application publication date: 20210309 |