Aqueous Ink Resin Solvent Interaction for Abrasion Resistance
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Solution Overview
Problem
Existing pigment inks used in ink jet recording methods suffer from low abrasion resistance, especially on recording media with poor ink absorptivity, and often experience ejection stability issues during large-size or continuous image recording.
Innovation Solution
An aqueous ink composition for ink jet recording that includes a pigment, a resin particle (either a polyester resin or a urethane resin), and specific organic solvents such as linear carbonate, cyclic carbonate, or dioxolane compounds, which interact with the resin particles to enhance abrasion resistance and maintain ejection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pigment ink is used to improve image fastness, then image fastness is improved, but abrasion resistance deteriorates
Solution Approach 1:
The invention uses a composite ink formulation containing pigment particles, polyester resin, and specific organic solvents (cyclic carbonate or dioxolane). The polyester resin forms a film that binds pigment particles together, creating a composite structure that maintains image fastness while significantly improving abrasion resistance. This composite approach allows the ink to achieve both durability and resistance to wear without requiring additional coating steps.
2Strength
If coating liquid is applied to improve abrasion resistance, then abrasion resistance is improved, but device complexity increases
Solution Approach 1:
The invention merges the functions of image formation and abrasion resistance enhancement into a single ink formulation. The polyester resin and organic solvent components are integrated directly into the ink, allowing the ink to provide both coloring and protective functions simultaneously. This eliminates the need for separate coating equipment and processes, simplifying the overall system while achieving the desired abrasion resistance.
3Strength
If urethane resin is used to improve abrasion resistance, then abrasion resistance is improved, but ejection stability deteriorates
Solution Approach 1:
The invention changes the resin parameter from urethane resin to polyester resin, which has different chemical and physical properties. Polyester resin provides better compatibility with the aqueous ink formulation and maintains stable ejection characteristics. The specific selection of cyclic carbonate or dioxolane as organic solvents further optimizes the resin-pigment-solvent interaction, ensuring both ejection stability and abrasion resistance are achieved simultaneously.
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 ejection stability and significantly improves the abrasion resistance of images recorded on various recording media, including those with low ink absorptivity, without the need for additional coating liquids or treatments.
Implementation Method 1
the organic solvent is at least one selected from the group consisting of a compound represented by a general formula (1), a compound represented by a general formula (2) and a compound represented by a general formula (3)
Data Source
AI summary
Provided is an aqueous ink that has excellent ejection stability and that can be used to record an image with excellent abrasion resistance and an ink cartridge and an ink jet recording method that use the aqueous ink. The aqueous ink is an aqueous ink for ink jet containing a pigment, an organic solvent and a resin particle formed of a polyester resin or a urethane resin. The organic solvent includes a carbonate compound and the like. The ink cartridge includes an ink container configured to contain the aqueous ink and the ink jet recording method records an image on a recording medium by ejecting the aqueous ink from an ink jet recording head.