Inkjet Ink Composition for Low-Absorbable Media Printing
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Solution Overview
Problem
Aqueous ink compositions struggle to provide excellent image quality on base materials with poor wettability, leading to issues like nozzle clogging and deterioration in printing quality.
Innovation Solution
An ink composition for inkjet using a specific alkanediol with a carbon number of 6 to 10, a mass ratio of alkanediol to ink composition of 10% or more, and a heating medium temperature of 50°C or higher to improve image quality and reduce nozzle clogging on low-absorbable media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If aqueous ink composition is used on base materials with poor wettability, then nozzle clogging occurs and printing quality deteriorates, but image quality cannot be improved
Solution Approach 1:
The patent changes the chemical composition parameters of the ink by incorporating specific surfactants (anionic, cationic, or nonionic) and controlling their concentrations within defined ranges. This modifies the ink's surface tension and wettability characteristics, enabling it to adhere properly to low-absorbable base materials without causing nozzle clogging or printing quality deterioration
Solution Approach 2:
The patent creates a composite ink formulation by combining aqueous ink composition with multiple types of surfactants (anionic, cationic, and/or nonionic) in specific proportions. This composite approach synergistically improves wettability on poor substrates while maintaining nozzle reliability and overall printing quality
2Manufacturing precision
If heating temperature is increased to improve image quality on low-absorbable media, then printing quality improves, but energy consumption increases
Solution Approach 1:
The patent replaces part of the thermal energy requirement with chemical action by incorporating surfactants that actively reduce surface tension and enhance wetting. This chemical mechanism substitutes for purely thermal processes, allowing effective printing on low-absorbable media at lower heating temperatures, thus reducing energy consumption while maintaining solid image quality
3Manufacturing precision
If ink composition is modified to improve wettability on poor substrates, then printing quality improves, but nozzle clogging increases
Solution Approach 1:
The patent carefully controls the concentration parameters of surfactants within specific ranges (as defined in the patent claims) to achieve optimal wettability improvement without excessive viscosity increase or chemical reactions that could cause nozzle clogging. This precise parameter control balances wettability enhancement with nozzle reliability
Solution Approach 2:
The patent applies different types of surfactants (anionic, cationic, nonionic) with specific local functions to address different aspects of the problem: some surfactants primarily improve wettability while others are selected to maintain flow characteristics and prevent nozzle clogging, creating a functionally differentiated composite system
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 solution enhances printing quality on low-absorbable media by reducing nozzle clogging and maintaining image integrity, achieving excellent solid image quality.
Implementation Method 1
a water-soluble organic solvent, which is an alkanediol having a carbon number of 6 or more and 10 or less
Implementation Method 2
the typing is performed by ejecting the ink composition for inkjet on the ink-unabsorbable or ink-low-absorbable medium that is heated
Data Source
AI summary
An ink composition for inkjet and a method for inkjet recording are provided. The ink composition for inkjet includes: a pigment, a water, an alkanediol having a carbon number of 6 or more and 10 or less; and a resin emulsion. A minimum value of a mass ratio of the alkanediol to the ink composition for inkjet is 10%. And, the method includes: performing a typing by attaching an ink composition for inkjet to an ink-unabsorbable or ink-low-absorbable medium. The ink composition for inkjet is prepared by dispersing solutes including a pigment and a resin emulsion in a water including an alkanediol having a carbon number of 6 or more and 10 or less; and the typing is performed by ejecting the ink composition for inkjet on the ink-unabsorbable or ink-low-absorbable medium heated at 50° C. or more and 60° C. or less.