CN111253798A

CN111253798A - 3D glass pad printing ink and preparation and application thereof

Info

Publication number: CN111253798A
Application number: CN202010263717.0A
Authority: CN
Inventors: 尚其宇; 钟仙亮; 任善福
Original assignee: Jiangxi Cicai New Material Technology Co ltd
Current assignee: Jiangxi Cicai New Material Technology Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-06-09

Abstract

The invention provides pad printing ink capable of being applied to 3D cambered surface glass, and preparation and application thereof, wherein the pad printing ink comprises the following raw materials: 50-70 parts of modified polyester resin, 15-20 parts of inorganic toner, 1-3 parts of thixotropic agent, 2-5 parts of non-silicon additive and 10-20 parts of solvent. The ink disclosed by the invention is commonly used for 3D cambered glass and common plane glass, is wide in transfer printing applicability and precise in construction effect, can greatly improve the production efficiency by matching with a quick-drying diluent and a blower, is simple and quick in interlayer overprinting, can be completely cured after being finally baked at 150 ℃ for 30 minutes, and can resist boiling of 3H-4H.

Description

3D glass pad printing ink and preparation and application thereof

Technical Field

The invention relates to the field of 3D glass decoration, in particular to decorative ink which is mainly applied to 3D glass window printing processes such as a mobile phone touch screen, a tablet personal computer screen and the like and is printed and constructed on 3D cambered surface glass in a pad printing mode.

Technical Field

With the diversification and refinement of decorative effects, the development of glass cover plates is developing towards the 3D direction, the common silk-screen printing process can not meet the requirements of the 3D era, a printing mode suitable for the radian of a 3D curved surface is urgently needed, the pad printing process can just meet the requirements of an arc surface process on the basis, and the pad printing process is applied to 3D glass in a large quantity, meanwhile, the requirement of 3D glass pad printing ink is met, the radian of the 3D glass is increased in a step-by-step manner from 50 degrees to more than 80 degrees or even higher, higher requirements are also put forward on the pad printing ink, the pad printing effect is good, the ink discharging effect is achieved at the concave arc, and the inking property at the R angular position is the problem that the pad printing ink needs to be considered and solved, and the step of the new 3D glass process market can be well followed only by solving the pad printing property which is suitable for the inward concave radian of the 3D glass.

Disclosure of Invention

The invention aims to develop pad printing ink which has good 3D pad printing constructability and simultaneously meets various basic and environmental tests of a glass cover plate, and is explored and applied to mass and high-efficiency production.

Firstly, each raw material of the basic composition of the printing ink is purposefully screened, matched and combined

1. Different from silk screen printing, the binder with better thixotropy is needed to be selected for facilitating ink taking and deinking of a glue head.

2. The thickness of the pad printing ink is influenced by the depth of a steel plate, an excessively deep steel plate is not beneficial to construction, and the toner required to be selected has high shielding property when the film thickness is relatively low to reach a good OD value.

3. The pad printing technology carries out ink transfer printing through a rubber head, the ink drying speed directly influences the ink construction, and the collocation of the fast and slow solvents must be proper.

The invention integrates the special requirements of the pad printing ink, selects 50-70 parts of modified polyester resin with excellent thixotropy, 15-20 parts of shielding and medium-grade inorganic toner with black degree through screening and optimization, matches with a certain amount (1-3 parts) of thixotropic agent and (2-5 parts) of non-silicon auxiliary agent, and 10-20 parts of quick-drying and medium-drying solvents matched according to different volatilization rates.

Secondly, the preparation of the printing ink must be strictly carried out according to the process requirements

1. And (3) sequentially putting the resin except the toner powder, the thixotropic agent and the solvent in the optimized raw materials into a container, stirring and mixing, adding the toner powder while stirring until the toner powder is wetted and stirred for 20-30 minutes, sealing and soaking for 24 hours for later use.

2. And grinding the soaked mixture on a three-roller machine, and performing fineness detection each time until the fineness reaches below 10 um.

3. And (3) adjusting the viscosity of the ink with the fineness OK by using a solvent to reach the viscosity standard of 15000-25000CPS, adding an auxiliary agent, stirring for 10-20 minutes, and packaging the finished ink for later use.

Finally, the following matters must be paid attention to in the application and construction process of the pad printing ink

1. The printing ink selects modified polyester resin, and needs to be matched with an isocyanate curing agent to be used as two components in practical application, wherein the printing ink comprises the following components in parts by weight: curing agent is prepared by mixing 100: 10 in proportion by weight.

2. The transfer printing can be carried out on a single layer or on multiple layers, the single layer is directly baked for 30 minutes at 150 ℃ and completely cured, the transfer printing on the multiple layers uses quick-drying thinner layers and can be directly overprinted without baking, the dry thinner layers need to be surfed for 3-5 minutes at 150 ℃ during use and then overprinted, and the final transfer printing is completely cured at 150 ℃ for 30 minutes.

3. The quick-drying diluent and the intermediate-drying diluent can be selected according to the actual conditions of customers, if the non-blowing equipment suggests to select the quick-drying diluent, if the blowing equipment suggests to use the intermediate-drying diluent, the quick-drying diluent and the intermediate-drying diluent can be properly adjusted according to the requirements of customers.

Detailed Description

The present invention will be described in detail with reference to the following examples

The ink components such as toner content, thixotropic agent ratio adjustment embodiment are as follows:

the optimal proportion of each component is preferably selected through various comparison tests, the shielding force is maximized when 15% of toner is used, the thixotropic enhancement effect is optimal when 3% of thixotropic agent is used, and the leveling and defoaming effect is optimal when 2% of additive is used.

Carrying out application test by using a quick-drying solvent and a slow-drying solvent to match and prepare the quick-drying and slow-drying of the diluent:

from the above table, when the solvent is too fast to dry, the offset of the gum is not thorough, and the solvent is too slow to dry, which is not good for the ink-fetching effect of the gum, when the solvent is between the fast-slow ratio of 50: 50 and 80: 20, the effect is optimal, and the difference of different customer sites is considered, and the speed ratio of 50: 50 blending the medium dry diluent in a speed ratio of 80: 20 blending quick-drying diluent.

Claims

1. The 3D glass pad printing ink is characterized in that: the feed comprises the following raw materials in parts by weight: 50-70 parts of modified polyester resin, 15-20 parts of inorganic toner, 1-3 parts of thixotropic agent, 2-5 parts of non-silicon additive and 10-20 parts of solvent.

2. A 3D glass pad printing ink according to claim 1 wherein: the defoaming agent and the leveling agent are non-silicon water-based defoaming agents and non-silicon water-based leveling agents.

3. The method of preparing a 3D glass pad printing ink according to claim 1, wherein: and sequentially adding the resin, the thixotropic agent and the solvent except the color powder into a clean container for stirring and mixing, simultaneously adding the color powder while stirring at the speed of 500-.

4. The method of preparing a 3D glass pad printing ink according to claim 1, wherein: and grinding the soaked mixture on a three-roller machine, and performing fineness detection each time until the fineness reaches below 10 um.

5. The method of preparing a 3D glass pad printing ink according to claim 1, wherein: and (3) adjusting the viscosity of the ink with the fineness OK by using a solvent to reach the viscosity standard of 15000-25000CPS, adding an auxiliary agent, stirring for 10-20 minutes, and packaging the finished ink for later use.

6. Use of a 3D glass pad printing ink according to claim 1, wherein: the printing ink substrate is 3D glass.

7. Use of a 3D glass pad printing ink according to claim 1, wherein: the ink construction mode is pad printing.

8. The use of a 3D glass pad printing ink according to claim 7, wherein: printing the ink on a glass window by using a pad printing machine, baking for 30min at 150 ℃ to form a film, and boiling resistance is achieved for 3-4H after the film is formed.