Inkjet Recording Sequence for Reactive Ink Fixation
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Solution Overview
Problem
Inkjet recording methods using aqueous ink compositions on low or non-absorbing recording media face challenges in achieving optimal image quality and scratch resistance due to differences in reactivity between multiple inks and a reaction liquid, leading to deteriorated image quality and scratch resistance.
Innovation Solution
A recording method where a second ink composition with lower reactivity is adhered to the recording medium before a first ink composition, allowing for sufficient reaction with a reaction liquid to improve image quality and scratch resistance, involving specific arrangements of inkjet heads and heating controls to optimize ink adhesion and film formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple inks with different reactivity are used with a reaction liquid, then image recording is achieved, but the components of the ink cannot sufficiently react with the reaction liquid due to a difference in reactivity, leading to deteriorated image quality and scratch resistance
Solution Approach 1:
The patent applies preliminary action by pre-adhering the reaction liquid to the recording medium before ejecting the ink compositions. This allows the reaction liquid to be present and ready to react with all ink components simultaneously, ensuring that both high-reactivity and low-reactivity inks have equal opportunity to react充分地 with the reaction liquid, thereby resolving the reactivity difference issue and improving image quality and scratch resistance
2Object-affected harmful factors
If aqueous ink composition is used on low or non-absorbing recording medium, then environmental safety is improved, but image quality and scratch resistance are deteriorated due to insufficient ink fixation
Solution Approach 1:
The patent uses a reaction liquid as an intermediary substance that is pre-adhered to the recording medium. This reaction liquid acts as a mediator between the aqueous ink composition and the recording medium, facilitating the reaction and aggregation of ink components to form a fixed image layer. This intermediary mechanism enables aqueous inks to achieve sufficient fixation on non-absorbing media without compromising environmental safety
Solution Approach 2:
The patent changes the chemical parameters of the recording surface by pre-coating it with a reaction liquid that has specific reactive properties. This parameter change transforms the recording medium from a non-reactive surface to an active surface that can chemically interact with the ink components, enabling sufficient fixation and improving image quality and scratch resistance while maintaining the use of environmentally safe aqueous inks
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
The method achieves a recorded material with enhanced image quality and scratch resistance by ensuring sufficient reaction between inks and the reaction liquid, while maintaining ejection stability and preventing nozzle clogging.
Implementation Method 1
a reaction liquid which reacts with and aggregates components of an ink composition
Data Source
AI summary
A recording method according to the invention includes adhering a reaction liquid which reacts with and aggregates components of an ink composition to a recording medium; adhering a first ink composition to the recording medium; and adhering a second ink composition having reactivity with the reaction liquid lower than that of the first ink composition to the recording medium. Adhesion of the second ink composition to the recording medium is performed prior to adhesion of the first ink composition to the recording medium.