A uv haptics ink and method of making the same

Abstract

The application belongs to the technical field of ink, and discloses a UV touch ink and a preparation method thereof.The UV touch ink comprises a UV modified acrylate, an acetylacetate ethyl ester-containing acrylic resin, an active monomer, an organic wax, a photoinitiator and a solvent; the active monomer is selected from at least one of dipropylene glycol diacrylate, diethylene glycol phthalate diacrylate, neopentyl glycol diacrylate and hexanediol diacrylate. The UV modified acrylate, the acetylacetate ethyl ester-containing acrylic resin, the active monomer and the organic wax are used as main components, and the selection of the active monomer enables the prepared UV touch ink to have excellent skin feeling and velvet feeling effects, and excellent adhesion, light resistance, weather resistance, alcohol resistance and solvent resistance. Meanwhile, the UV touch ink can simplify the curing process, and only needs to be dried by UV after printing, has high curing efficiency, and does not need to be dried by hot air and UV.

Description

Technical Field

[0001] This invention belongs to the field of ink technology, specifically relating to a UV tactile ink and its preparation method. Background Technology

[0002] Tactile inks, also known as flocked inks, have a pleasant plush feel and are widely favored by consumers. Currently, the cigarette packaging industry is placing greater emphasis on tactile quality in its packaging, leading to their increasingly widespread application. However, due to limitations in processing and materials, water-based tactile inks are currently the primary type. Nevertheless, water-based tactile inks also have many drawbacks, such as incomplete drying, frequent clumping and sticking, poor adhesion, poor smoothness, poor abrasion resistance, and poor solvent resistance, which severely restrict their widespread use.

[0003] In existing technologies, most water-based UV tactile inks are prepared primarily from water-based self-matte polyurethane, water-based polyurethane acrylate, and acrylic UV monomers. The curing process of these inks after printing is complex, requiring initial hot air drying to remove surface moisture, followed by UV light curing to form a two-component ink layer that has undergone drying and UV curing. However, most current curing equipment only has infrared heating or UV curing capabilities; requiring dual curing necessitates equipment modification, which is costly. Even with modification and dual curing, the resulting ink layer still suffers from issues such as poor surface adhesion, poor lightfastness, and poor weather resistance.

[0004] Therefore, there is an urgent need to provide a tactile ink that simplifies the curing process and has good adhesion, abrasion resistance and weather resistance. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a UV tactile ink and its preparation method. The UV tactile ink provided by the present invention simplifies the curing process and has good adhesion, sun resistance, and weather resistance.

[0006] This invention provides a UV-sensitive ink.

[0007] Specifically, a UV tactile ink includes: a UV-modified acrylate, an acrylic resin containing ethyl acetoacetate, an active monomer, an organic wax, a photoinitiator, and a solvent;

[0008] The active monomer is selected from at least one of tripropylene glycol diacrylate, diethylene phthalate diacrylate, neopentyl glycol diacrylate, and hexanediol diacrylate.

[0009] Preferably, the active monomer is selected from at least two of the following: tripropylene glycol diacrylate, diethylene phthalate diacrylate, neopentyl glycol diacrylate, and hexanediol diacrylate.

[0010] Preferably, the solvent comprises at least one of ethyl acetate, n-propyl acetate, and isopropanol.

[0011] Preferably, the photoinitiator is selected from at least one of 2,4,6-trimethylbenzoylphosphonate, 1-hydroxy-cyclohexyl-phenyl ketone, methyl o-benzoylbenzoate, and benzophenone.

[0012] Preferably, the organic wax comprises polypropylene wax.

[0013] Preferably, the UV tactile ink, by weight, comprises: 20-40 parts UV-modified acrylate, 40-60 parts acrylic resin containing ethyl acetoacetate, 10-25 parts reactive monomer, 3-8 parts photoinitiator, 0.05-0.5 parts organic wax, and 3-10 parts solvent.

[0014] More preferably, the UV tactile ink, by weight, comprises: 25-35 parts UV-modified acrylate, 45-55 parts acrylic resin containing ethyl acetoacetate, 10-20 parts reactive monomer, 3-6 parts photoinitiator, 0.1-0.2 parts organic wax, and 3-5 parts solvent.

[0015] Preferably, the UV tactile ink further includes a leveling agent and a defoamer.

[0016] Preferably, the UV tactile ink further includes 0.1-0.5 parts by weight of a leveling agent and 0.1-0.5 parts by weight of a defoamer.

[0017] Preferably, the leveling agent comprises a polyether-modified polysiloxane polymer.

[0018] Preferably, the defoamer comprises polyether-modified polydimethylsiloxane.

[0019] The present invention also provides a method for preparing UV tactile ink.

[0020] Specifically, a method for preparing a UV tactile ink includes the following steps:

[0021] The components are mixed and dispersed to obtain UV tactile ink.

[0022] Preferably, a method for preparing a UV tactile ink includes the following steps:

[0023] UV-modified acrylate and active monomers are mixed and dispersed to obtain a UV semi-finished product; acrylic resin containing ethyl acetoacetate is mixed and dispersed with a photoinitiator, and then the UV semi-finished product is added, mixed, and then organic wax is added and dispersed; finally, the viscosity is adjusted with a solvent, and after filtration, a UV tactile ink is obtained.

[0024] More specifically, a method for preparing a UV tactile ink includes the following steps:

[0025] (1) Mix UV-modified acrylate and active monomer, and disperse at a speed of 400-600 r / min for 20-40 min to obtain UV semi-finished product;

[0026] (2) Mix the acrylic resin containing ethyl acetoacetate with the photoinitiator and disperse it at a speed of 100-200 r / min for 10-20 min; then add the UV semi-finished product prepared in step (1), mix and add organic wax, disperse it at a speed of 400-600 r / min for 20-40 min to obtain the pre-prepared solution.

[0027] (3) The viscosity of the pre-prepared liquid prepared in step (2) is adjusted by solvent and then filtered to obtain UV tactile ink.

[0028] Preferably, when the UV tactile ink also contains a leveling agent, the leveling agent is added after the UV semi-finished product is added, and then dispersed at a speed of 800-1000 r / min for 40-60 min.

[0029] The UV tactile ink provided by this invention comprises UV-modified acrylate, acrylic resin containing ethyl acetoacetate, active monomers, and organic wax as main components. The photoinitiator initiates the curing and crosslinking reaction of the UV-modified acrylate, acrylic resin containing ethyl acetoacetate, and active monomers. The active monomers can regulate the fluidity of the system and promote the curing effect. The organic waxes can improve the ink's abrasion resistance, solvent resistance, and weather resistance.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] This invention uses UV-modified acrylate, acrylic resin containing ethyl acetoacetate, active monomers, and organic waxes as main components. By selecting the active monomers, the prepared UV tactile ink exhibits excellent skin-feel and velvety effects, as well as superior adhesion, sun resistance, weather resistance, and alcohol and solvent resistance. Furthermore, the UV tactile ink provided by this invention simplifies the curing process; after printing, only UV drying is required, resulting in high curing efficiency without the need for dual hot air and UV drying. Detailed Implementation

[0032] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.

[0033] The UV-modified acrylates used in Examples 1-4 and Comparative Examples 1-2 were UV-51600, purchased from Greenlink (Jining) Chemical Technology Co., Ltd.; the acrylic resin containing ethyl acetoacetate in Examples 1-4 and Comparative Example 2 was ethyl acetoacetate methacrylate, purchased from Shenzhen Pulikai New Materials Co., Ltd.; unless otherwise specified, the other raw materials, reagents or apparatus could be obtained from conventional commercial sources or by existing known methods.

[0034] Example 1

[0035] A UV-sensitive ink, comprising the following components by weight:

[0036]

[0037]

[0038] The active monomers are 5 parts tripropylene glycol diacrylate, 5 parts diethylene phthalate diacrylate, and 5 parts neopentyl glycol diacrylate; the solvents are 3 parts ethyl acetate and 2 parts isopropanol; the photoinitiator is ethyl 2,4,6-trimethylbenzoylphosphonate and 1-hydroxy-cyclohexyl-phenyl ketone (in a 1:1 ratio); the leveling agent is a polyether-modified polysiloxane polymer; the defoamer is a polyether-modified polydimethylsiloxane; and the organic wax is polypropylene wax.

[0039] The preparation method of the above-mentioned UV tactile ink includes the following steps:

[0040] At room temperature, UV-modified acrylate is added to a mixer and stirred at 500 rpm for approximately 30 minutes until homogeneous. Then, reactive monomers are added, and stirring continues for 120 minutes to obtain a UV semi-finished product. In another mixer, acrylic resin containing ethyl acetoacetate and an initiator are added and stirred at 150 rpm for 15 minutes until uniformly dispersed. The obtained UV semi-finished product is then added, and stirring continues for 15 minutes. A leveling agent is then added, and stirring continues at 900 rpm for 60 minutes. Defoamer and organic wax are then added, and the stirring speed is adjusted to 500 rpm for another 30 minutes to obtain a pre-finished product. The pre-finished product is prepared with solvent and finally filtered through a 300-mesh filter bag to obtain a UV tactile ink.

[0041] Example 2

[0042] A UV-sensitive ink, comprising the following components by weight:

[0043]

[0044]

[0045] The active monomer is 17 parts of tripropylene glycol diacrylate; the solvent is 2 parts of ethyl acetate and 3 parts of n-propyl ester; the photoinitiator is 2 parts of ethyl 2,4,6-trimethylbenzoylphosphonate, 2 parts of methyl o-benzoylbenzoate and 1 part of benzophenone; the leveling agent is a polyether-modified polysiloxane polymer; the defoamer is a polyether-modified polydimethylsiloxane; and the organic wax is polypropylene wax.

[0046] The preparation method of the above-mentioned UV tactile ink includes the following steps:

[0047] At room temperature, UV-modified acrylate is added to a mixer and stirred at 500 rpm for approximately 30 minutes until homogeneous. Then, reactive monomers are added, and stirring continues for 120 minutes to obtain a UV semi-finished product. In another mixer, acrylic resin containing ethyl acetoacetate and an initiator are added and stirred at 150 rpm for 15 minutes until uniformly dispersed. The obtained UV semi-finished product is then added, and stirring continues for 15 minutes. A leveling agent is then added, and stirring continues at 900 rpm for 60 minutes. Defoamer and organic wax are then added, and the stirring speed is adjusted to 500 rpm for another 30 minutes to obtain a pre-finished product. The pre-finished product is prepared with solvent and finally filtered through a 300-mesh filter bag to obtain a UV tactile ink.

[0048] Example 3

[0049] A UV-sensitive ink, comprising the following components by weight:

[0050]

[0051]

[0052] The active monomers are 8 parts tripropylene glycol diacrylate, 7 parts neopentyl glycol diacrylate, and 5 parts hexanediol diacrylate; the solvents are 2 parts ethyl acetate, 2 parts n-propyl acetate, and 2 parts isopropanol; the photoinitiator is 2 parts ethyl 2,4,6-trimethylbenzoylphosphonate, 2 parts methyl o-benzoylbenzoate, and 2 parts benzophenone; the leveling agent is a polyether-modified polysiloxane polymer; the defoamer is a polyether-modified polydimethylsiloxane; and the organic wax is polypropylene wax.

[0053] The preparation method of the above-mentioned UV tactile ink includes the following steps:

[0054] At room temperature, UV-modified acrylate is added to a mixer and stirred at 500 rpm for approximately 30 minutes until homogeneous. Then, reactive monomers are added, and stirring continues for 120 minutes to obtain a UV semi-finished product. In another mixer, acrylic resin containing ethyl acetoacetate and an initiator are added and stirred at 150 rpm for 15 minutes until uniformly dispersed. The obtained UV semi-finished product is then added, and stirring continues for 15 minutes. A leveling agent is then added, and stirring continues at 900 rpm for 60 minutes. Defoamer and organic wax are then added, and the stirring speed is adjusted to 500 rpm for another 30 minutes to obtain a pre-finished product. The pre-finished product is prepared with solvent and finally filtered through a 300-mesh filter bag to obtain a UV tactile ink.

[0055] Example 4

[0056] A UV-sensitive ink, comprising the following components by weight:

[0057]

[0058]

[0059] The active monomers are 3 parts tripropylene glycol diacrylate, 3 parts neopentyl glycol diacrylate, and 4 parts hexanediol diacrylate; the solvents are 2 parts ethyl acetate, 2 parts n-propyl acetate, and 1 part isopropanol; the photoinitiator is 2 parts ethyl 2,4,6-trimethylbenzoylphosphonate, 2 parts methyl o-benzoylbenzoate, and 1 part benzophenone; the leveling agent is a polyether-modified polysiloxane polymer; the defoamer is a polyether-modified polydimethylsiloxane; and the organic wax is polypropylene wax.

[0060] The preparation method of the above-mentioned UV tactile ink includes the following steps:

[0061] At room temperature, UV-modified acrylate is added to a mixer and stirred at 500 rpm for approximately 30 minutes until homogeneous. Then, reactive monomers are added, and stirring continues for 120 minutes to obtain a UV semi-finished product. In another mixer, acrylic resin containing ethyl acetoacetate and an initiator are added and stirred at 150 rpm for 15 minutes until uniformly dispersed. The obtained UV semi-finished product is then added, and stirring continues for 15 minutes. A leveling agent is then added, and stirring continues at 900 rpm for 60 minutes. Defoamer and organic wax are then added, and the stirring speed is adjusted to 500 rpm for another 30 minutes to obtain a pre-finished product. The pre-finished product is prepared with solvent and finally filtered through a 300-mesh filter bag to obtain a UV tactile ink.

[0062] Comparative Example 1

[0063] The difference from Example 3 is that the acrylic resin containing ethyl acetoacetate was replaced with an equal amount of ordinary acrylic resin (model KDD731, purchased from Guangdong Keding Functional Materials Co., Ltd.), and the remaining components and preparation method are the same as in Example 3.

[0064] Comparative Example 2

[0065] The difference from Example 3 is that the active monomer is replaced with 10 parts of dipropylene glycol diacrylate and 10 parts of triethylene glycol diacrylate, while the remaining components and preparation method are the same as in Example 3.

[0066] Comparative Example 3

[0067] This comparative example is a water-based UV tactile oil, specifically the water-based UV tactile oil provided in Example 6 of Patent 202011488788.7.

[0068] Comparative Example 4

[0069] This comparative example provides an aqueous touch oil, comprising the following components by weight:

[0070]

[0071] The preparation method is as follows:

[0072] At room temperature, waterborne acrylic resin, waterborne polyurethane, and diluent are added to a mixer and stirred at a speed of 500 rpm for about 50 minutes to ensure uniform resin dispersion. Then, a hand-feeling agent, leveling agent, defoamer, and paraffin emulsion are added, and stirring continues for 20 minutes to obtain the finished waterborne hand-feeling oil.

[0073] Product effectiveness test

[0074] The performance of the UV tactile oil prepared in the examples was tested. The UV tactile oil prepared in the examples was printed on 300-mesh screen printing mesh, cured by UV lamp irradiation (curing energy was set by the energy ratio of the UV lamp controller), and its performance was tested. The specific test items and test methods are as follows:

[0075] (1) Solid content is determined by solid volatiles and the weight ratio before and after curing.

[0076] (2) Viscosity: Using the GB general test method for the coating industry, at 30℃, the outflow time of the rheostat was tested using a No. 3 Zein cup.

[0077] (3) Tactile effect: The surface is evaluated in terms of its tactile performance, specifically the skin feel and the velvet feel.

[0078] (4) Adhesion: After applying 3M 810 tape for the printing industry, pull it off after 10 seconds and calculate the area remaining on the printed surface. Deviation: Adhesion area less than 80%; Excellent: Adhesion area not less than 98%, and the tape leaves virtually no ink residue when pulled off.

[0079] (4) Sunlight resistance rating: The color difference before and after exposure to sunlight is less than 15% when the xenon lamp sunlight resistance tester is used to determine the rating. Among them, poor sunlight resistance: discoloration occurs after 12 hours; good sunlight resistance: slight discoloration occurs after 24 hours; very sunlight resistance: slight discoloration occurs after 48 hours.

[0080] (5) Abrasion resistance: The abrasion resistance of the surface is tested using an abrasion tester. The test is based on the absence of obvious color difference when rubbed at 4 pounds. The test is then conducted on the number of rubs that can be performed. Among them, poor: less than or equal to 50 rubs; poor: more than 50 rubs but less than or equal to 200 rubs; good: more than 200 rubs but less than 500 rubs; excellent: more than 500 rubs.

[0081] (6) Solvent resistance: Add ethanol and n-propyl ester to the surface of the printed material and wipe it. If it does not peel off or change color, it is judged by the wiping time being greater than or equal to 10s. Then it has excellent solvent resistance.

[0082] (7) Weather resistance: Place a stack of 500 printed sheets between two wooden boards, tie them tightly with straps, and place them in a constant temperature drying oven at 50-60℃ for 24 hours. After taking them out and letting them air dry to room temperature, open the straps and check whether the printed sheets are stuck or clumped together.

[0083] The test results are shown in Tables 1 and 2.

[0084] Table 1

[0085]

[0086]

[0087] Table 2

[0088]

[0089]

[0090] As shown in Tables 1 and 2, the UV tactile ink provided in this embodiment of the invention exhibits excellent skin-feel and velvety texture after printing, and demonstrates superior adhesion, sun resistance, weather resistance, and resistance to alcohol and solvents. Furthermore, it requires only UV drying after printing, eliminating the need for dual hot air and UV drying. The UV tactile ink provided by this invention utilizes UV curing, resulting in high curing efficiency, thorough curing, and excellent drying properties, thus eliminating the adhesion risk associated with water-based tactile inks and water-based UV tactile inks. Compared to traditional water-based tactile oils, the UV tactile ink provided by this invention converts hot air drying to UV drying (curing), representing a change in the material properties system. This change contributes to improvements in anti-blocking, solvent resistance, sun resistance, and weather resistance.

[0091] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A UV-sensitive ink, characterized in that, By weight, it includes: 25-35 parts UV-modified acrylate, 45-55 parts acrylic resin containing ethyl acetoacetate, 10-20 parts reactive monomer, 3-6 parts photoinitiator, 0.1-0.2 parts organic wax and 3-5 parts solvent; The active monomer is composed of tripropylene glycol diacrylate, diethylene phthalate diacrylate, and neopentyl glycol diacrylate, or is composed of tripropylene glycol diacrylate, neopentyl glycol diacrylate, and hexanediol diacrylate. The solvent contains at least one of ethyl acetate, n-propyl ester, and isopropanol.

2. The UV tactile ink according to claim 1, characterized in that, The photoinitiator is selected from at least one of 2,4,6-trimethylbenzoylphosphonate, 1-hydroxy-cyclohexyl-phenyl ketone, methyl o-benzoylbenzoate, and benzophenone.

3. The UV tactile ink according to claim 1, characterized in that, The organic wax comprises polypropylene wax.

4. The UV tactile ink according to claim 1, characterized in that, The UV-sensitive ink also includes leveling agents and defoamers.

5. The UV tactile ink according to claim 4, characterized in that, The leveling agent comprises a polyether-modified polysiloxane polymer; the defoamer comprises a polyether-modified polydimethylsiloxane.

6. The method for preparing the UV tactile ink according to any one of claims 1-5, characterized in that, Includes the following steps: The components are mixed and dispersed to obtain UV tactile ink.

7. The method for preparing UV tactile ink according to claim 6, characterized in that, Includes the following steps: UV-modified acrylate and active monomers are mixed and dispersed to obtain a UV semi-finished product; acrylic resin containing ethyl acetoacetate is mixed and dispersed with a photoinitiator, and then the UV semi-finished product is added, mixed, and then organic wax is added and dispersed; finally, the viscosity is adjusted with a solvent, and after filtration, a UV tactile ink is obtained.

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