Inkjet Curing Sequence for Yellow Ink Wrinkle Prevention
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Solution Overview
Problem
The existing ink jet recording method in JP-A-2008-6695 faces challenges with the yellow ink absorbing more active energy than other colors, leading to delayed curing of inner portions and resulting in curing wrinkles on the coating film, which reduces the gloss of the coating film.
Innovation Solution
The method involves ejecting cyan, magenta, and black inks onto the recording medium and applying temporary curing radiation, followed by ejecting yellow ink and applying full curing radiation without temporary curing, optimizing the curing process to ensure uniform gloss and reduce wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If temporary curing radiation is applied to yellow ink, then curing speed is improved, but curing wrinkles occur on the coating film surface
Solution Approach 1:
The patent applies different curing radiation strategies to different ink colors based on their specific properties. Yellow ink receives full curing radiation without temporary curing, while other colors receive temporary curing. This localized differentiation resolves the contradiction by tailoring the curing process to the specific characteristics of each ink, preventing wrinkles in yellow ink while maintaining efficient curing for other colors.
Solution Approach 2:
The patent changes the curing radiation parameters (type and timing) based on the ink color. For yellow ink, the parameter change is using full curing radiation instead of temporary curing radiation. This parameter adjustment optimizes the curing process for yellow ink's high pigment active energy absorption, preventing the surface wrinkles caused by premature curing while ensuring complete curing.
2Manufacturing precision
If full curing radiation is applied immediately to yellow ink, then curing uniformity is improved, but curing time is extended
Solution Approach 1:
The patent performs preliminary curing for cyan, magenta, and black inks before yellow ink is applied. This preliminary action allows the recording medium to be prepared and positioned correctly, and enables the yellow ink to be cured immediately with full curing radiation without extending the overall process time, as the yellow ink is the final step anyway.
3Manufacturing precision
If yellow ink is ejected last, then curing wrinkles are reduced, but processing complexity increases
Solution Approach 1:
The patent segments the ink ejection process into distinct phases: first ejecting and temporarily curing cyan, magenta, and black inks, then ejecting yellow ink and applying full curing radiation. This segmentation simplifies the control logic by dividing the process into clear sequential steps rather than requiring complex real-time adjustments, while still achieving the goal of preventing yellow ink wrinkles.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures proper wet spreading and curing of the inks, reducing curing wrinkles and achieving high-quality images with uniform gloss by aligning the ejection order with pigment absorption and using appropriate radiation intensities and types.
Implementation Method 1
The yellow ink absorbs more active energy with the pigment than the inks of the other colors
Implementation Method 2
radiation curable inks... applying temporary curing radiation to the recording medium... applying full curing radiation to the recording medium
Data Source
AI summary
An ink jet recording method is a method in which a cyan ink, a magenta ink, a black ink, and a yellow ink radiation that are curable inks are ejected from ink jet heads to attach the radiation curable inks to a recording medium. The method includes, in this order, a first step of attaching the cyan ink, the magenta ink, and the black ink onto the recording medium and applying temporary curing radiation to the recording medium and a second step of attaching the yellow ink onto the recording medium and applying full curing radiation to the recording medium without applying the temporary curing radiation.