Waterborne, NIR drying ink for ink jet printing

A technology of inkjet printing and ink, which is applied in the field of ink, can solve problems such as cyanine, etc. that are not mentioned

Active Publication Date: 2016-04-20
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, no mention of cyanine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Cyanine with a trade name of "S0837" from FEW Chemicals in Germany was dissolved at a concentration of about 0.25% in an aqueous ink containing a conventional main colorant.

[0022] The cyanines form J-aggregates during dissolution which have a narrow-band absorption maximum at a wavelength of about 900 nm to about 1100 nm, preferably about 950 nm to about 1050 nm, particularly preferably about 1050 nm. The aggregates have an average particle size of from a few nanometers to about 2 μm, preferably about 1 μm.

[0023] The ink is printed with a commercially available printing head suitable for aqueous ink, for example, a printing head with the trade name "Samba" from Fujifilm, USA.

[0024] After the water-based ink has been transferred to the printed material, such as paper, cardboard or film, the printed material is irradiated across its width with a laser.

[0025] The geometry of the laser beam on the printed material corresponds to a line extending at least across...

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PUM

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Abstract

An inventive ink for ink jet printing which comprises water, preferably a pigment, as a solvent and at least one colorant, wherein the colorant absorbing visible light and thus stains the ink, is characterized in that the ink contains at least one further coloring agent, which in the water is dissolved in the solution and forming J-aggregates, wherein the J-aggregates absorb NIR radiation for radiation drying of the ink.

Description

technical field [0001] The present invention relates to inks and uses thereof. Background technique [0002] When printing with inkjet printing (Inkjet printing), it is known to use water-based inks, ie inks with water as the basic solvent. Since a large amount of water is transferred to the printed material with such inks, it is necessary to dry the printed image. Examples of known dryers include hot air dryers and radiation dryers. The latter work mainly with ultraviolet light or with infrared, especially NIR (near infrared) radiation heating. Generally, the ink should be dried during infrared drying, but the printed material is largely affected by heating. At the same time, it should generally be dried quickly after inking to prevent moisture from penetrating into the printing material strongly. [0003] For coloring the inks, known cyanines, especially phthalocyanines, are used, for example. DE60304675T2 discloses a water-based ink using phthalocyanine dyes. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/328C09D11/38
CPCC09D11/32C09D11/328C09B23/0066C09B67/0033
Inventor U·恩斯特M·施勒霍尔茨S·恩斯特K·赖纳
Owner HEIDELBERGER DRUCKMASCHINEN AG
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