Glittery Ink Resin Particle Segmentation for Gloss and Attachability
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Solution Overview
Problem
Existing glittery inks face challenges in achieving a balance between high gloss and excellent attachability, as they often compromise on either conductivity or flatness due to the trade-off between resin particle proportion and glitter pigment ratio.
Innovation Solution
A glittery ink formulation containing glittery pigment particles, resin particles with specific size distributions, and an organic solvent, where the particle diameter relationships a≤c≤b and a<b are maintained, allowing for a balanced ink layer with enhanced gloss and attachability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If resin particle proportion is increased to improve attachability, then attachability is improved, but gloss deteriorates
Solution Approach 1:
The resin particle population is segmented into multiple size groups (first, second, third size groups with different average particle diameters). This segmentation allows different size ranges to fulfill different functions: smaller particles fill gaps and improve flatness/attachability, while larger particles maintain surface structure for gloss, resolving the contradiction between attachability and gloss
Solution Approach 2:
Different size groups of resin particles are distributed throughout the ink layer with specific resin-to-pigment ratio ranges for each group. This creates local quality variations where smaller particles concentrate in certain regions to enhance attachability while larger particles are positioned to maintain gloss, allowing both properties to coexist in different local zones of the ink layer
2Illumination intensity
If glitter pigment ratio is increased to improve gloss, then gloss is improved, but attachability deteriorates
Solution Approach 1:
The resin particles are segmented into multiple size groups that work synergistically with the glitter pigment. The segmentation allows the system to achieve high gloss through optimized pigment arrangement while maintainable attachability through the combined effect of different sized resin particles that provide both structural support and gap-filling capabilities
Solution Approach 2:
The ink formulation uses a composite system combining glitter pigment particles with resin particles of three different size groups. This composite material approach allows the synergistic interaction between pigment and multi-sized resin particles to achieve both high gloss and excellent attachability simultaneously, overcoming the trade-off present in single-component systems
3Shape
If resin particle size is decreased to improve flatness, then flatness is improved, but conductivity deteriorates
Solution Approach 1:
The resin particle population is segmented into three size groups rather than using a single size. This segmentation ensures that smaller particles (first size group) provide flatness by filling gaps, while larger particles (third size group) maintain conductivity pathways. The intermediate size group (second size group) bridges the gap between small and large particles, ensuring both flatness and conductivity are maintained through the combined effect of all three groups
Solution Approach 2:
The invention changes the particle size parameter from a single value to a distributed range across three groups. By controlling the average particle diameters and resin-to-pigment ratios of each group within specific ranges, the system optimizes both flatness (through smaller particles) and conductivity (through larger particles), resolving the contradiction between these two properties
Data Source
AI summary
A glittery ink contains glittery pigment particles, resin particles, and an organic solvent, wherein the following relationships are satisfied: a≤c≤b and a<b, where a represents the particle diameter of the resin particles corresponding to the minimum of two or more peaks in a particle size distribution as measured by a dynamic light scattering particle size distribution measuring device, b represents the particle diameter of the resin particles corresponding to the maximum of the two or more peaks in the particle size distribution, and c represents the particle diameter of the glittery pigment corresponding to a maximum number of particles in a particle size distribution as measured by the dynamic light scattering particle size distribution measuring device.