Phosphorescent Inkjet Ink Formulation for Luminance Without Nozzle Clogging
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Solution Overview
Problem
Existing inkjet inks containing phosphorescent pigments face issues with luminance saturation and nozzle clogging, limiting the production of high-definition, high-luminance cured products.
Innovation Solution
An inkjet ink formulation comprising a polymerizable compound, phosphorescent pigment, and an acidic dispersant, cured by active rays, enhances dispersibility and reduces nozzle clogging, allowing for high luminance and thick film formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the film thickness is increased to increase luminance, then the luminance increases up to a certain level, but the luminance becomes saturated and does not increase further
Solution Approach 1:
The patent changes the chemical composition parameters of the ink formulation, specifically incorporating a polymerizable compound that forms a transparent cured product matrix. This allows light to penetrate through the film more effectively, preventing saturation and maintaining luminance proportionality with film thickness. The polymerizable compound modifies the optical properties of the cured product to enhance light transmission.
2Manufacturing precision
If phosphorescent pigment is used to create phosphorescent cured products, then high definition patterning is achieved, but nozzle clogging occurs frequently
Solution Approach 1:
The patent introduces a dispersant as an intermediary substance between the phosphorescent pigment particles and the ink vehicle. This dispersant prevents pigment aggregation and maintains stable suspension, allowing smooth inkjet nozzle operation while preserving high definition patterning capability. The dispersant acts as a mediator that eliminates the clogging problem without sacrificing print quality.
Solution Approach 2:
The patent creates a composite ink formulation combining phosphorescent pigment, dispersant, and polymerizable compound. This composite material system maintains the benefits of phosphorescent pigment for high definition patterning while the dispersant and polymerizable matrix prevent nozzle clogging, achieving both precision and reliability.
3Illumination intensity
If conventional ink formulations are used with phosphorescent pigment, then basic printing function is achieved, but luminance is insufficient and nozzle clogging occurs
Solution Approach 1:
The patent develops a composite ink system integrating phosphorescent pigment, dispersant, and polymerizable compound. This composite formulation simultaneously achieves high luminance through the phosphorescent material and reliable nozzle operation through the dispersant-stabilized suspension and polymerizable matrix, overcoming the limitations of conventional single-component formulations.
Solution Approach 2:
The patent fundamentally changes the chemical parameters of the ink formulation by incorporating polymerizable compounds and dispersants. These parameter changes transform the ink from a simple pigment suspension to a sophisticated composite system that delivers both high luminance and nozzle reliability.
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 inkjet ink achieves high luminance and durability of cured products while minimizing nozzle issues, enabling efficient production of high-definition patterns.
Implementation Method 1
A phosphorescent pigment is known which absorb light of a predetermined wavelength, accumulates the energy of the light, and emits light with a wavelength different from that of the absorbed light for a long time even after the absorption of light is stopped
Implementation Method 2
The inkjet ink contains a polymerizable compound, a phosphorescent pigment, and a dispersant having an acidic functional group, and is cured by irradiation with active rays
Data Source
AI summary
The inkjet ink contains a polymerizable compound, a phosphorescent pigment, and a dispersant having an acidic functional group, and is cured by irradiation with active rays.