阅读说明：本技术 一种具有凹印裂变效果的印刷品制备工艺 (Preparation process of printed matter with gravure fission effect ) 是由 李朝刚 陈明 刘小文 张鑫 胡爽 寸时勇 于 2019-09-19 设计创作，主要内容包括：本发明涉及印刷技术领域,具体涉及一种具有凹印裂变效果的印刷品制备工艺,包括如下步骤：步骤A：通过凹印版将UV裂变油墨印刷于承载物上；步骤B：将印刷有UV裂变油墨的承载物依次经过UV引爆处理和UV干燥固化处理,制得具有凹印裂变效果的印刷品。本发明具有凹印裂变效果的印刷品制备工艺,操作简单,易于控制,生产效率高,能使制得的印刷品凹印裂变效果明显,且固化后的油墨在承载物上的附着力较佳,不易出现起边、翘起等现象,同时具有较佳的耐候性和耐老化性,不易出现黄变或褪色等现象,质量稳定,能用于大批量生产。(The invention relates to the technical field of printing, in particular to a preparation process of a printed matter with a gravure fission effect, which comprises the following steps: step A: printing UV fission ink on a carrier through an intaglio plate; and B: and (3) sequentially carrying out UV detonation treatment and UV drying and curing treatment on the bearing object printed with the UV fission ink to prepare a printed matter with a gravure fission effect. The preparation process of the printed matter with the gravure fission effect has the advantages of simple operation, easy control and high production efficiency, can ensure that the prepared printed matter has obvious gravure fission effect, has better adhesive force of the cured printing ink on a bearing object, is not easy to generate the phenomena of edge rising, tilting and the like, has better weather resistance and aging resistance, is not easy to generate the phenomena of yellowing or fading and the like, has stable quality, and can be used for mass production.)

1. A preparation process of a printed matter with a gravure fission effect is characterized by comprising the following steps: the method comprises the following steps:

step A: printing UV fission ink on a carrier through an intaglio plate;

and B: and (3) sequentially carrying out UV detonation treatment and UV drying and curing treatment on the bearing object printed with the UV fission ink to prepare a printed matter with a gravure fission effect.

2. The process of claim 1, wherein the method comprises the following steps: in the step A, the plate depth of the gravure plate is 65-70 mu m, the number of lines is 80-90 lines, and the cross section of the mesh is conical.

3. The process of claim 1, wherein the method comprises the following steps: in the step A, the UV fission ink comprises the following raw materials in parts by weight:

4. the process of claim 3, wherein the method comprises the following steps: each part of the auxiliary agent comprises 3-8 parts of flatting agent and 2-6 parts of defoaming agent; each part of the flatting agent is a mixture of polydimethylsiloxane, diacetone alcohol and a MODAREZ MFP C type acrylate flatting agent in a weight ratio of 2-4:0.5-1.5: 2; each part of the defoaming agent is prepared from polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene polyoxyethylene glycerol ether in a weight ratio of 1: 2-4: 3, and (b) a mixture of the components.

5. The process of claim 3, wherein the method comprises the following steps: each part of the photosensitizer is a mixture of benzophenone, 2,4, 6-trimethylbenzoyldiphenylphosphine oxide and alpha-hydroxycyclohexylbenzone in a weight ratio of 3:4-7: 2; each part of the solvent is prepared from ethanol, acetone, isopropanol and water in a weight ratio of 2-4:0.5-1.5: 3: 3-5.

6. The process of claim 3, wherein the method comprises the following steps: the modified epoxy acrylic resin comprises the following raw materials in parts by weight:

7. the process of claim 6, wherein the method comprises the following steps: the modified epoxy acrylic resin is prepared by the following steps:

step (1): putting epoxy resin into a reaction device according to parts by weight, heating while stirring, sequentially adding 2,3,4, 5-tetrafluorobenzoic acid, p-hydroxyanisole and triphenylphosphine after heating to 45-55 ℃, then continuing heating while stirring, stopping heating when heating to 75 ℃, then heating the materials to 98 ℃, cooling to 80 ℃, keeping the temperature at 80-115 ℃, and reacting for 1.5-3 hours to obtain a mixture; the addition amount of the p-hydroxyanisole and the triphenylphosphine is 50 percent of the total amount of the p-hydroxyanisole and the triphenylphosphine;

step (2): and (2) when the acid value of the mixture prepared in the step (1) is lower than 5 or the mixture becomes light yellow, dropwise adding acrylic resin, controlling the acrylic resin to be completely dropwise added within 15-30min, then adding the rest p-hydroxyanisole and triphenylphosphine, reacting for 1-3h at the temperature of 110-115 ℃, sampling to test the acid value, and cooling to the temperature below 90 ℃ when the acid value is lower than 3, and discharging to prepare the modified epoxy acrylic resin.

8. The process of claim 3, wherein the method comprises the following steps: the UV fission ink is prepared by the following steps:

step S1: according to the weight parts, fully and uniformly mixing polyurethane acrylic resin, tert-butyl hydroquinone, trimethylolpropane triacrylate and a photosensitizer, stirring and dispersing at constant temperature to prepare a mixture;

step S2: adding the modified epoxy acrylic resin, the auxiliary agent and the solvent into the mixture prepared in the step S2 according to the parts by weight, and stirring for 30-40min to uniformly disperse the raw materials to reach the viscosity of 40-55 Pa.s; and finally filtering through 200-mesh gauze to obtain the UV fission ink, and barreling for later use.

9. The process of claim 8, wherein the method comprises the following steps: in the step S1, the stirring temperature at constant temperature is 45-55 ℃, the stirring time is 55-65min, and the stirring and the dispersion are carried out until the grain diameter of the mixture reaches 10-18 μm.

10. The process of claim 8, wherein the method comprises the following steps: in the step B, a UV detonation lamp assembly is adopted in the UV detonation treatment, the UV detonation lamp assembly comprises 1-5 UV detonation lamp tubes with power of 7-16kW, and the UV wavelength of the UV detonation treatment is 220-380 nm; in the step B, a UV drying curing lamp assembly is adopted in the UV drying curing treatment, the UV drying curing lamp assembly comprises 4-6 UV drying curing lamps with the power of 9-14kW, the UV wavelength of the UV drying curing treatment is 240-405nm, and the treatment temperature is 35-40 ℃.

Technical Field

The invention relates to the technical field of printing, in particular to a preparation process of a printed matter with a gravure fission effect.

Background

At present, printing effects of printed matters are various, a gold stamping effect, a holographic effect or a cracking wrinkle effect and the like are adopted, but for the printed matters with the cracking effect, ink printed on the printed matters is cured and the like, even the cracking effect can be formed, the edges of the ink after cracking have the phenomena of edge rising, tilting and the like, the phenomenon of internal shrinkage after curing of the ink is obvious, so that the ink layer after curing is easy to fall off from a bearing object, the adhesive force is low, the sun-proof and aging-resistant performance is low, the phenomena of yellowing or fading and the like are easy to occur, the appearance of the printed matters is influenced, the durability is reduced, and the packaging grade of the printed matters is reduced.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the printed matter preparation process with the gravure fission effect, the operation is simple, the control is easy, the production efficiency is high, the gravure fission effect of the prepared printed matter is obvious, the adhesion force of the cured printing ink on a bearing object is good, the phenomena of edge rising, tilting and the like are not easy to occur, the weather resistance and the aging resistance are good, the phenomena of yellowing or fading and the like are not easy to occur, the quality is stable, and the process can be used for mass production.

The purpose of the invention is realized by the following technical scheme: a preparation process of a printed matter with a gravure fission effect comprises the following steps:

step A: printing UV fission ink on a carrier through an intaglio plate;

and B: and (3) sequentially carrying out UV detonation treatment and UV drying and curing treatment on the bearing object printed with the UV fission ink to prepare a printed matter with a gravure fission effect.

The ink layer with the gravure fission effect is prepared on the bearing object through the steps, the operation is simple, the control is easy, the production efficiency is high, the UV detonation treatment is adopted, the UV fission ink can be triggered to generate the light fusion reaction, after the UV fission ink after the light fusion is subjected to the UV drying and curing treatment, the ink is cured and formed, the fissile wrinkle effect is formed, the surface appearance and the attractiveness of a printed product are improved, the gravure fission effect of the printed product is obvious, the adhesive force of the cured ink on the bearing object is good, the phenomena of edge rising, tilting and the like are not easy to occur, the cured ink has good weather resistance and aging resistance, the phenomena of yellowing or fading and the like are not easy to occur, the quality is stable, and the ink layer can be used for mass production.

Preferably, in the step A, the plate depth of the gravure plate is 65-70 μm, the number of lines is 80-90 lines, and the cross section of the cells is tapered. The invention can improve the inking quantity of the UV fission ink by strictly controlling the plate depth and the line number of the gravure plate and the structure of the mesh, has high precision, ensures that the graphic and text information gravure on the surface of a bearing object is clear, and does not have the phenomena of wire drawing, edge blurring and the like.

Preferably, in the step a, the UV fission ink includes the following raw materials in parts by weight:

according to the invention, the UV fission ink prepared by the raw materials has good viscosity, high adhesive force on a bearing object and low internal shrinkage after UV detonation and UV drying curing treatment, so that the cured ink pattern layer does not have the phenomena of edge rising, tilting and the like, has good weather resistance and aging resistance, is not easy to have the phenomena of yellowing, fading and the like, and has stable quality.

The modified epoxy acrylic resin is blended with the polyurethane acrylic resin, so that the printing ink has better viscosity and adhesive force, and the introduced modified epoxy acrylic resin can improve the curing speed of a printing ink system and simultaneously does not reduce the flexibility of the printing ink, so that the printing ink is not easy to become brittle after being cured, and further, the phenomena of cracking, edge lifting, tilting and the like are reduced and avoided. Because the cured epoxy resin has the defects of high crosslinking density, large internal stress, poor quality brittleness, fatigue resistance, heat resistance, poor impact toughness and the like, the phenomena of edge rising, tilting and the like are easy to occur after the ink system is detonated and cured, and the acrylic resin is adopted to modify the epoxy resin, so that the brittleness, the humidity resistance and the heat resistance of the epoxy resin are improved, the epoxy resin has better flexibility, and the phenomena of brittleness and the like are not easy to occur.

The adopted tertiary butyl hydroquinone can adjust the viscosity of the ink, so that the ink can be stably attached to the surface of the ink, the internal contraction force of an ink system after UV detonation and UV drying curing is reduced, and the phenomena of edge rising, tilting and the like caused by the internal contraction of the ink are reduced and avoided; the adopted trimethylolpropane triacrylate plays a role in modifying and diluting an ink system, the viscosity of the ink system is adjusted, the cross-linking property of the polyurethane acrylic resin and the modified epoxy acrylic resin is improved, the curing time is shortened, and the adhesive strength between the ink and a bearing object is improved.

The adopted photosensitizer can absorb UV light energy, promote the polymerization crosslinking of polyurethane acrylic resin and modified epoxy acrylic resin in an ink system, improve the quality stability of the ink, enlarge the photosensitive range of the ink, promote the processes of UV detonation treatment and UV drying and curing treatment, and shorten the curing time; the adopted solvent can improve the dispersibility among materials, improve the leveling property and the ductility of an ink system, is easy to print and form on the surface of a bearing object and has stable adhesion.

Preferably, each part of the auxiliary agent comprises 3-8 parts of a flatting agent and 2-6 parts of a defoaming agent; each part of the flatting agent is a mixture of polydimethylsiloxane, diacetone alcohol and a MODAREZ MFP C type acrylate flatting agent in a weight ratio of 2-4:0.5-1.5: 2; each part of the defoaming agent is prepared from polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene polyoxyethylene glycerol ether in a weight ratio of 1: 2-4: 3, and (b) a mixture of the components.

By adopting the flatting agent, the surface tension of an ink system can be reduced, the ductility of the ink is improved, the ink is printed uniformly, and the forming is stable; the defoaming agent can reduce or inhibit bubbles generated in the ink preparation process, has good thermal stability, can avoid the influence on the quality of the ink due to the bubbles generated by UV detonation and temperature rise in the UV photocuring process, and avoids the bad phenomena of shrinkage cavity, orange peel and the like of an ink pattern layer caused by the generation of the bubbles.

Preferably, each part of the photosensitizer is a mixture of benzophenone, 2,4, 6-trimethylbenzoyldiphenylphosphine oxide and alpha-hydroxycyclohexylbenzone in a weight ratio of 3:4 to 7: 2.

By adopting the photosensitizer, the UV light energy can be absorbed, the polymerization and crosslinking of the polyurethane acrylic resin and the modified epoxy acrylic resin in an ink system are promoted, the quality stability of the ink is improved, the photosensitive range of the ink is expanded, the processes of UV detonation treatment and UV drying and curing treatment are promoted, and the curing time is shortened; wherein, the benzophenone adopted has low cost and good fusion promoting effect; 2,4, 6-trimethylbenzene formyl diphenyl phosphine oxide adopted has good fusion promoting effect, high activity and wider light absorption range, generates two free radicals of benzoyl and phosphoryl after illumination, can initiate polymerization, accelerates the photocuring speed, has low volatility, weakens or avoids the internal shrinkage of an ink system, has photobleaching function, ensures that the ink is not easy to yellow after being cured and formed, and improves the weather resistance and the aging resistance of the ink; the adopted alpha-hydroxycyclohexyl benzophenone does not yellow, can improve the yellowing resistance of the ink, and has good thermal stability and high initiation efficiency.

Preferably, each part of the solvent is prepared by mixing ethanol, acetone, isopropanol and water in a weight ratio of 2-4:0.5-1.5: 3: 3-5.

The solvent adopted by the invention can improve the dispersibility among materials, improve the leveling property and the ductility of an ink system, is easy to print and form on the surface of a bearing object and has stable adhesion.

Preferably, the modified epoxy acrylic resin comprises the following raw materials in parts by weight:

according to the invention, acrylic acid and 2,3,4, 5-tetrafluorobenzoic acid are adopted to provide carboxylic acid groups of a system, the carboxylic acid groups are crosslinked with epoxy groups of epoxy resin under the catalytic action of triphenylphosphine serving as a catalyst, and meanwhile, p-hydroxyanisole is combined to prevent materials in the system from agglomerating to play a role in inhibiting polymerization, so that stable modified epoxy acrylic resin is prepared, the prepared modified epoxy acrylic resin is used for improving the curing speed of an ink system, the flexibility of the ink is not reduced, the brittleness of the cured ink is not easy to occur, and the phenomena of cracking, edge lifting and the like of the ink are reduced and avoided.

Preferably, the modified epoxy acrylic resin is prepared by the following steps:

step (1): putting epoxy resin into a reaction device according to parts by weight, heating while stirring, sequentially adding 2,3,4, 5-tetrafluorobenzoic acid, p-hydroxyanisole and triphenylphosphine after heating to 45-55 ℃, then continuing heating while stirring, stopping heating when heating to 75 ℃, then heating the materials to 98 ℃, cooling to 80 ℃, keeping the temperature at 80-115 ℃, and reacting for 1.5-3 hours to obtain a mixture; the addition amount of the p-hydroxyanisole and the triphenylphosphine is 50 percent of the total amount of the p-hydroxyanisole and the triphenylphosphine;

step (2): and (2) when the acid value of the mixture prepared in the step (1) is lower than 5 or the mixture becomes light yellow, dropwise adding acrylic resin, controlling the acrylic resin to be completely dropwise added within 15-30min, then adding the rest p-hydroxyanisole and triphenylphosphine, reacting for 1-3h at the temperature of 110-115 ℃, sampling to test the acid value, and cooling to the temperature below 90 ℃ when the acid value is lower than 3, and discharging to prepare the modified epoxy acrylic resin.

According to the invention, 2,3,4, 5-tetrafluorobenzoic acid is added into epoxy resin, the acid value of a system is regulated and controlled, the 2,3,4, 5-tetrafluorobenzoic acid is pre-reacted with the epoxy resin, p-hydroxyanisole and triphenylphosphine are added in batches to catalyze and promote the reaction process, prevent the agglomeration of materials, strictly control the reaction temperature of the system, improve the polymerization activity of the epoxy resin, and subsequently acrylic resin is added into the system in a dropwise manner, so that the binding property of the acrylic resin and the epoxy resin can be improved, the prepared stable and uniformly dispersed modified epoxy acrylic resin is obtained, the curing speed of an ink system is improved by using the prepared modified epoxy acrylic resin, the flexibility of the ink is not reduced, the brittleness of the ink after curing is not easy to occur, and the phenomena of cracking, edge lifting and the like of the ink are reduced and avoided.

Preferably, the UV fission ink is prepared by:

step S1: according to the weight parts, fully and uniformly mixing polyurethane acrylic resin, tert-butyl hydroquinone, trimethylolpropane triacrylate and a photosensitizer, stirring and dispersing at constant temperature to prepare a mixture;

step S2: adding the modified epoxy acrylic resin, the auxiliary agent and the solvent into the mixture prepared in the step S2 according to the parts by weight, and stirring for 30-40min to uniformly disperse the raw materials to reach the viscosity of 40-55 Pa.s; and finally filtering through 200-mesh gauze to obtain the UV fission ink, and barreling for later use.

Preferably, in the step S1, the stirring temperature at constant temperature is 45-55 ℃, the stirring time is 55-65min, and the stirring and the dispersion are carried out until the particle size of the mixture reaches 10-18 μm.

According to the invention, the UV fission ink prepared by adopting the steps has good viscosity, high adhesive force on a bearing object and low inner shrinkage after UV detonation and UV drying curing treatment, so that the cured ink pattern layer does not have the phenomena of edge rising, tilting and the like, has good weather resistance and aging resistance, is not easy to have the phenomena of yellowing, fading and the like, and has stable quality.

Preferably, in the step B, the UV detonation treatment adopts a UV detonation lamp assembly, the UV detonation lamp assembly comprises 1-5 UV detonation lamp tubes with power of 7-16kW, and the UV wavelength of the UV detonation treatment is 220-380 nm.

Preferably, in the step B, the UV drying and curing treatment adopts a UV drying and curing lamp assembly, the UV drying and curing lamp assembly comprises 4-6 UV drying and curing lamps with the power of 9-14kW, the UV wavelength of the UV drying and curing treatment is 240-405nm, and the treatment temperature is 35-40 ℃.

According to the invention, by strictly controlling the UV wavelength of the UV detonation treatment and the UV wavelength and temperature of the UV drying curing treatment, the phenomena of edge rising, tilting and the like of the cured printing ink pattern layer can be avoided, and the printing ink pattern layer has better weather resistance and aging resistance, is not easy to have the phenomena of yellowing, fading and the like, and has stable quality.

The invention has the beneficial effects that: the preparation process of the printed matter with the gravure fission effect has the advantages of simple operation, easy control and high production efficiency, can trigger the UV fission ink to generate the photofusion reaction by adopting the UV detonation treatment, can cure and form the ink after the UV fission ink after the photofusion is subjected to the UV drying and curing treatment, and forms the fission wrinkle effect, thereby improving the surface appearance and the aesthetic property of the printed matter.

Detailed Description

The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.