Transfer Body Cleaning via SP Value Solvent for Ink Jet Residue Removal
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Solution Overview
Problem
The transfer type ink jet recording method faces issues with image quality degradation due to residues on the transfer body, leading to dot defects and white spots, especially during repeated recording, as existing cleaning methods are insufficient in removing resin particles that act as adhesives.
Innovation Solution
The method involves using an aqueous cleaning liquid with a specific water-soluble organic solvent having an SP value of 17.0 to 29.0, which effectively penetrates and removes residues from the transfer body, improving cleaning performance and reducing image quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cleaning methods are used on the transfer body, then the cleaning process is simple, but the cleaning performance is insufficient and residues remain causing dot defects and white spots
Solution Approach 1:
The patent applies parameter changes by specifying a particular SP value range (17.0 to 29.0) for the water-soluble organic solvent in the cleaning liquid. This parameter optimization enables effective removal of resin particle residues while maintaining cleaning liquid stability and compatibility with the transfer body, thereby improving image quality without excessive complexity
Solution Approach 2:
The cleaning liquid is designed as a composite composition containing water, a water-soluble organic solvent with specific SP value (17.0 to 29.0), and a surfactant. This composite formulation synergistically combines different components to achieve effective residue removal while maintaining appropriate cleaning liquid properties for repeated use
2Productivity
If the transfer body is used for repeated recording, then productivity increases, but cleaning performance degrades and image quality deteriorates due to accumulated residues
Solution Approach 1:
The patent enables continuous productive operation by formulating a cleaning liquid that maintains effective cleaning performance across multiple recording cycles. The specific SP value range (17.0 to 29.0) of the water-soluble organic solvent ensures consistent residue removal capability, allowing the transfer body to be reused repeatedly without image quality degradation
Solution Approach 2:
By optimizing the SP value parameter of the cleaning liquid within the range of 17.0 to 29.0, the patent achieves effective removal of resin particle residues that accumulate during repeated recording. This parameter optimization maintains cleaning effectiveness over multiple cycles, enabling sustained productivity without image quality deterioration
3Reliability
If a cleaning liquid with high cleaning power is used, then residues are removed effectively, but the cleaning liquid may damage the transfer body or cause other issues
Solution Approach 1:
The patent optimizes the SP value parameter of the water-soluble organic solvent within the range of 17.0 to 29.0 to achieve effective residue removal while maintaining compatibility with the transfer body. This parameter control ensures sufficient cleaning power without causing damage to the transfer body surface
Solution Approach 2:
The cleaning liquid is formulated as a composite containing water, a water-soluble organic solvent with specific SP value (17.0 to 29.0), and a surfactant. This composite structure provides effective cleaning performance through synergistic action of components while maintaining gentle properties that protect the transfer body from damage
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 enables high-quality image recording with reduced dot defects and white spots by enhancing the cleaning efficiency of the transfer body, even during repeated use, by utilizing a cleaning liquid with a solvent that has excellent affinity with resin particles.
Implementation Method 1
The cleaning liquid contains a first water-soluble organic solvent having an SP value [unit: (J/cm3)1/2], which is obtained by a Fedors method, of 17.0 or more to 29.0 or less
Data Source
AI summary
The method includes in order: forming an intermediate image by applying the aqueous ink to a transfer body; transferring the intermediate image by bringing the intermediate image into contact with the recording medium; and cleaning the transfer body by applying an aqueous cleaning liquid to the transfer body, and if necessary, further includes applying an aqueous reaction liquid containing a reactant which reacts with the aqueous ink to the transfer body, wherein at least one of the aqueous ink and the reaction liquid contains a resin particle (however, when not including the applying of the reaction liquid, the aqueous ink contains the resin particle), and the cleaning liquid contains a first water-soluble organic solvent having an SP value [unit: (J/cm3)1/2] of 17.0 or more to 29.0 or less.