Ink Set with Polyester-Modified Polydialkylsiloxane for Abrasion Resistance
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Solution Overview
Problem
Existing ink jet recording methods face challenges in achieving satisfactory abrasion resistance and uniformity when using combinations of inks on recording media with low absorbability, such as synthetic paper and films, due to irregularities and unsatisfactory performance of images formed with undercoats and glitter inks.
Innovation Solution
An ink set comprising a first ink with a white or glitter pigment and a second ink with carbon black or organic pigment, both containing polyester-modified polydialkylsiloxane, along with heterocyclic compounds and amide compounds, is used to enhance the ink's properties for improved abrasion resistance and surface dryness on low absorbability media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inks are used for recording on low absorbability media, then the recording can be performed, but the images have irregularity and unsatisfactory abrasion resistance
Solution Approach 1:
The patent changes the chemical parameters of the ink by incorporating polyester-modified polydialkylsiloxane with specific molecular weight (1,000-10,000) and functional groups (hydroxyl, carboxyl, or amine). This modifies the ink's interaction with low absorbability media, improving both abrasion resistance and image uniformity without requiring changes to the recording apparatus or media
Solution Approach 2:
The patent creates a composite ink formulation by combining polyester-modified polydialkylsiloxane with specific solvents (heterocyclic compounds, amide compounds, carboxylic acid esters) and pigments. This composite composition achieves synergistic effects that simultaneously improve abrasion resistance and prevent image irregularity on low absorbability media
2Adaptability or versatility
If inks are used alone without combination, then the ink composition can be simple, but it cannot serve multiple functions such as forming undercoats or imparting glitter
Solution Approach 1:
The patent designs a universal ink formulation containing polyester-modified polydialkylsiloxane that can function both as a standalone recording ink and as part of multi-ink combinations (including undercoats and glitter inks). The specific chemical composition enables the ink to adapt to different recording scenarios without requiring separate specialized formulations
Solution Approach 2:
The patent uses polyester-modified polydialkylsiloxane as a common base component across different ink types (color inks, white inks, glitter inks), creating homogeneous chemical characteristics that ensure consistent performance whether the ink is used alone or in combination with other inks
3Adaptability or versatility
If images are formed with multiple inks on low absorbability media, then various image effects can be achieved, but the abrasion resistance and surface dryness deteriorate
Solution Approach 1:
The patent modifies the chemical parameters of multiple inks by incorporating polyester-modified polydialkylsiloxane, which changes the surface properties and drying characteristics. This enables multiple inks to be used together for varied image effects while maintaining sufficient surface dryness and abrasion resistance through the modified polymer's specific molecular weight and functional groups
Data Source
AI summary
An ink set for ink jet recording is provided, the ink set containing a first ink which contains a first pigment and a second ink which contains a second pigment, wherein each of the first and second inks contains polyester-modified polydialkylsiloxane.