Industrial thermal inkjet inks
A technology of inkjet ink, thermal inkjet, applied in the direction of ink, reproduction/marking method, printing, etc.
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Examples
Embodiment 1
[0108] Example 1. Ink Composition Testing.
[0109] Inks of the inventive compositions shown in Examples 2 to 6 were made using standard inkjet manufacturing practices. Before loading the ink into the TIJ cartridge to the printer, degas the ink by subjecting the ink to a suitable vacuum to reduce the dissolved oxygen (DO) content to TM A1100 Oxygen (O 2 ) EC sensor to measure DO levels. Filling ink into HP 45si TIJ print cartridges with VideojetTM 8510 thermal inkjet printer printing onto coated paper for low temperature continuous printing and decap testing. In most tests, a resolution of 300x300 dpi was used to generate print samples (unless otherwise noted). The first value (eg, '300x..') represents the vertical resolution (ie, native resolution), which is the actual physical dimensional separation between nozzles on the nozzle plate used to generate the printed image. The second value (eg, '..x300') represents the resolution in the direction of travel of the substrate...
Embodiment 2
[0117] Example 2. Properties of Inkjet Ink Compositions.
[0118] Table 3 below provides the components of the selected ink compositions and the test results indicated good reliability, functionality and stability. Units in the table are percent by weight unless otherwise stated. Decap testing was performed at room temperature at 300x300 dpi, with a "pass" rating indicating that all characters in the first printed code after the decap time period were visible and fully legible after the one hour decap time. "Failure" means that not all characters in the first print code are fully readable, although the print quality is fully recoverable.
[0119] Continuous printing tests were performed in an environmental chamber with a controlled temperature ranging from 5 °C to 40 °C. Alphanumeric codes in different font sizes from 5pt to 8pt at a resolution of 300x300 dpi are printed onto coated paper at a constant print speed of one code per second. The duration of each test is eight...
Embodiment 3
[0127] Example 3. Properties of Inkjet Ink Compositions.
[0128] Table 4 below provides the components and test results of selected ink compositions. Units in Table 4 are percent by weight unless otherwise specified. These ink formulations were prepared using preferred solvent balances, constant proportions of low and medium hydroxyl value terpene phenolic resins, but by using chemically distinct highly ethanol soluble binder resins. All tests reported here used the same test methods as described in the previous examples unless otherwise stated.
[0129] Drying time tests were performed in which 2D codes were printed onto non-porous substrates such as BOPP and polyester at room temperature at a resolution of 300x300 dpi. Drying time was then determined by performing finger rubbing across the printed code at increasing intervals until no smearing was visible in any portion of the test code, where a "pass" rating indicated a dry time of 5 seconds or less.
[0130] For the ...
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Abstract
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