Ink Composition for Inkjet Recording with Triazine Dyes
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Solution Overview
Problem
Existing ink compositions for inkjet recording methods face challenges in achieving high reliability, initial filling properties, intermittent printing stability, and light resistance, particularly in maintaining print quality and nozzle functionality over time.
Innovation Solution
An ink composition is developed that includes specific dyes (Y-1 and Y-2) with a defined content ratio, along with alkylene oxide adducts and acetylene glycols, which improve wettability and solubility, and polyoxyalkylene alkyl ethers to enhance printing stability and light resistance, while maintaining low dynamic contact angles for improved filling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional ink compositions are used to achieve light resistance, then light resistance is improved, but initial filling properties and intermittent printing stability deteriorate
Solution Approach 1:
The patent changes the chemical parameters by introducing a specific dye (Y-1) with a novel molecular structure containing a triazine group and heterocyclic group, and optimizes the content ratio between dye (Y-1) and dye (Y-2) to 9.5:0.5 to 7:3, achieving simultaneous improvement in light resistance and printing stability
Solution Approach 2:
The patent creates a composite dye system by combining two different dyes (Y-1 and Y-2) with complementary properties, where dye (Y-1) provides light resistance and the combination improves initial filling properties and intermittent printing stability, achieving synergistic effects
2Reliability
If ink composition is optimized for initial filling properties, then initial filling properties are improved, but light resistance deteriorates
Solution Approach 1:
The patent optimizes the content of dye (Y-1) to 2.0 mass% to 5.0 mass% and adjusts the content ratio with dye (Y-2) to achieve the balance between initial filling properties (dynamic contact angle 24° or lower at 100 msec) and light resistance, preventing the trade-off between these properties
3Quantity of substance
If ink composition uses higher dye concentration to improve print density, then print density is improved, but nozzle clogging increases
Solution Approach 1:
The patent changes the chemical structure of dye (Y-1) to include hydrophilic groups (—OR6 or —NHR7) and optimizes the total dye content to 2.0 mass% to 5.0 mass%, achieving good print density while maintaining nozzle functionality through improved solubility and reduced aggregation
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 ink composition achieves excellent initial filling properties, intermittent printing stability, and light resistance, preventing nozzle clogging and ensuring consistent print quality over time, with improved wettability and solubility that enhances the overall performance of inkjet recording.
Implementation Method 1
the dynamic contact angle of the composition to a silicon wafer is 24° or lower at 100 msec after dropping, and is 9° or lower at 5,100 msec after dropping
Implementation Method 2
polyoxyalkylene alkyl ether to enhance printing stability and light resistance
Implementation Method 3
an ink composition excellent in initial filling properties and (intermittent) printing stability
Data Source
AI summary
There is provided an ink composition, including: a combination of specific dyes, in which the dynamic contact angle of the ink to a silicon wafer is 24° or lower at 100 msec after dropping, and is 9° or lower at 5,100 msec after dropping.