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Transparent photocuring ink for 3D ink-jetting printing and preparation method thereof

An inkjet printing and light curing technology, applied in the field of printing, can solve the problems of easy yellowing, molecular chain breakage and opacity of printed products, and achieve the effect of excellent printing effect, excellent application performance and not easy to yellowing.

Active Publication Date: 2017-12-12
ZHUHAI SAILNER 3D TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing light-curable transparent ink is different from general light-curable color inks such as cyan ink, magenta ink, yellow ink, black ink, white ink, etc. The biggest disadvantage of light-curable transparent ink is that the printed products are easy to yellow and look opaque
[0006] Usually, the main reasons for the yellowing of printed products during the photocuring reaction of photocurable transparent inks may include the following: 1. The photoinitiator in the ink decomposes to produce quinone structures, which cause yellowing of printed products; 2. The photoinitiator itself is yellow. After the photocuring reaction, the photoinitiator in the ink does not completely react, and the remaining photoinitiator makes the printed product look yellow; 3. The photoinitiator is produced after being irradiated by light. Highly active free radicals may also cause the polymerized molecular chains in the ink to break, resulting in a conjugated structure, resulting in yellowing of the printed product; 4. The yellowing caused by the aging of the main resin in the ink is mainly due to The conjugated double bond produced by polymer chain scission will produce yellowing when the number of conjugation reaches a certain value, or the carbonyl group produced by oxidation after aging and chain scission, or the decomposition of nitrogen-containing group substances will produce colored amines;5 1. The surfactant used in the ink is incompatible with the whole system, making the printed product look cloudy and hazy

Method used

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  • Transparent photocuring ink for 3D ink-jetting printing and preparation method thereof
  • Transparent photocuring ink for 3D ink-jetting printing and preparation method thereof
  • Transparent photocuring ink for 3D ink-jetting printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058]

[0059] Preparation:

[0060](1) Put 30g of isobornyl acrylate IBOA, 18.68g of tricyclodecane dimethanol diacrylate EM2204, 48g of mercapto-modified aliphatic urethane acrylate oligomer Genomer 7302, 0.02g of BYK-377 and 0.5g of GENORAD16 in In the glass container, use a stirrer to stir to obtain a uniformly mixed first mixture; then add 0.8gTPO radical photoinitiator and 2g184 free radical photoinitiator to the first mixture and continue stirring until the free radical photoinitiator is completely dissolved to obtain the second mixture;

[0061] (2) Carry out primary filtration with a 0.45 μm glass fiber membrane, and then perform secondary filtration with a 0.22 μm PP membrane to obtain a filtrate;

[0062] (3) Under a vacuum degree of 0.1 MPa, filter under reduced pressure for 1 hour to remove air bubbles in the filtrate, and finally obtain a photocurable transparent ink for 3D inkjet printing.

[0063] Carry out performance test to the 3D inkjet printing photo...

Embodiment 2

[0072]

[0073] Preparation:

[0074] The preparation method of the photocurable transparent ink for 3D inkjet printing in this embodiment is basically the same as that of Embodiment 1, except that the time for decompression and degassing is adjusted to 2 hours.

[0075] According to the same test method as in Example 1, the performance test of the 3D inkjet printing photocurable transparent ink in this example is carried out, and the test results are shown in surface 1 .

Embodiment 3

[0077]

[0078] Preparation:

[0079] The preparation method of the 3D inkjet printing photocurable transparent ink in this example is basically the same as that of Example 1, except that the temperature of the 3D inkjet printing photocurable transparent ink is heated to 40-60°C for 1 hour by heating and degassing .

[0080] According to the same test method as in Example 1, the performance test of the 3D inkjet printing photocurable transparent ink in this example is carried out, and the test results are shown in surface 1 .

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Abstract

The invention provides transparent photocuring ink for 3D ink-jetting printing and a preparation method thereof. The transparent photocuring ink for 3D ink-jetting printing comprises acrylate monomers, sulfhydryl compounds, surfactants, photoinitiators and assistants. The transparent photocuring ink for 3D ink-jetting printing has the advantage of capability of inhibiting proneness to yellowing, muddiness and obscurity of printed products.

Description

technical field [0001] The invention relates to printing technology, in particular to a photocurable transparent ink for 3D inkjet printing and a preparation method thereof, belonging to the technical field of 3D inkjet printing. Background technique [0002] 3D inkjet printing technology is based on the working principle of inkjet printers. Under the excitation of digital signals, the ink in the nozzle chamber forms droplets in an instant, and is ejected from the nozzle at a certain speed and frequency. The layers are solidified into shape, and finally a 3D object is obtained. [0003] 3D inkjet printing inks can be divided into light-curable inks and temperature-curable inks according to different curing sources. Light-curable inks usually contain photoinitiators, oligomers (also called oligomers) and monomers. Photoinitiators are subject to The irradiation of light is excited to generate free radicals to promote the polymerization of oligomers and monomers to cure the in...

Claims

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Application Information

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IPC IPC(8): C09D11/30C09D11/38C09D11/101C09D11/03
CPCC09D11/03C09D11/101C09D11/30C09D11/38C08F220/282C08F220/387C08F220/1811B33Y70/00C09D11/10B33Y80/00C08F222/102C08F220/343C08F2800/20C09D11/107
Inventor 王风王丽坤杨前程李嘉
Owner ZHUHAI SAILNER 3D TECH CO LTD
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