Ink Set Gloss Clarity and Abrasion Resistance via Siloxane Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink jet recording methods using pigment inks face challenges in achieving both high abrasion resistance and gloss clarity, particularly when multiple inks with different pigment contents are used in combination, leading to uneven surface interactions and reduced image quality.
Innovation Solution
An aqueous ink set comprising a first ink with a higher pigment content, a water-soluble urethane resin, and a polyether-modified siloxane compound, and a second ink with a lower pigment content, also containing a water-soluble urethane resin and a polyether-modified siloxane compound, where the polyether-modified siloxane compound has a weight-average molecular weight of 10,000 to 50,000, allowing for improved surface energy interactions and diffusion to enhance gloss clarity and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an ink containing vinyl polymer particles, polyurethane polymer particles, and a water-insoluble organic compound is used, then glossiness and fixability are improved, but abrasion resistance remains insufficient
Solution Approach 1:
The invention uses a composite ink formulation containing both polyurethane polymer particles (for glossiness and fixability) and polyether-modified organosiloxane (for abrasion resistance). This composite approach combines the advantages of different materials to simultaneously achieve good gloss clarity and abrasion resistance, which individual materials cannot accomplish alone.
Solution Approach 2:
The invention changes the chemical composition parameters of the ink by introducing polyether-modified organosiloxane with specific molecular weight ranges (1,000-50,000) and controlling its content (0.01-5% by mass). This parameter optimization enables the ink to form a pigment layer with both good gloss clarity and improved abrasion resistance.
2Reliability
If a polyether-modified organosiloxane is added to improve abrasion resistance, then abrasion resistance is improved to some extent, but gloss clarity markedly deteriorates
Solution Approach 1:
The invention optimizes the molecular weight parameter of polyether-modified organosiloxane to be within 1,000-50,000 and controls its content at 0.01-5% by mass. This precise parameter control allows the organosiloxane to improve abrasion resistance without causing marked deterioration of gloss clarity, resolving the trade-off between these two properties.
Solution Approach 2:
The invention applies polyether-modified organosiloxane specifically to enhance the abrasion resistance of the pigment layer while maintaining the gloss clarity properties provided by the polyurethane polymer particles. The different components perform specialized functions in different aspects of image quality.
3Adaptability or versatility
If multiple inks with different pigment contents are used in combination, then color variety and image richness are improved, but surface unevenness increases and image quality deteriorates
Solution Approach 1:
The invention uses the same base resin composition (polyurethane polymer particles and polyether-modified organosiloxane) across multiple inks with different pigment contents. This homogeneous resin system ensures uniform surface properties and consistent drying behavior across all inks, preventing surface unevenness even when multiple inks are used in combination for various colors.
Solution Approach 2:
The polyurethane polymer particles and polyether-modified organosiloxane serve as universal components across all ink formulations in the set, providing consistent gloss clarity and abrasion resistance properties regardless of the specific pigment content. This universal base formulation maintains surface uniformity while allowing pigment variation for color diversity.
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 set effectively records images with excellent gloss clarity and abrasion resistance even when multiple inks are used together, preventing surface unevenness and maintaining image quality by optimizing the interaction and diffusion of components.
Implementation Method 1
A content S1 (% by mass) of a polyether-modified siloxane compound in the first ink is smaller than a content S2 (% by mass) of a polyether-modified siloxane compound in the second ink
Data Source
AI summary
The present invention relates to an ink set enabling the recording of images that have excellent gloss clarity and abrasion resistance even when a plurality of inks are used in combination, and an ink jet recording method using the ink set.