Ink Composition With Surface Energy Control for Curved-Surface Adhesion
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Solution Overview
Problem
Existing inkjet inks face challenges with low dispersion and storage stability, poor water resistance, and abrasion resistance, particularly when applied to irregular and curved surfaces, necessitating high artisanal labor and costs for wrinkle-free attachment.
Innovation Solution
An ink formulation containing water, a coloring material, resin, and organic solvent, with a controlled surface free energy polar component of 3.5 to 20 mJ/m², enhancing dispersion and storage stability, and a hydrophobic ink layer that adheres well to substrates, providing high water resistance and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional inkjet inks are applied to irregular and curved surfaces, then the printing process becomes complex requiring artisan techniques, but the attachment quality deteriorates with wrinkles and defects
Solution Approach 1:
The patent changes the surface free energy parameters of the ink by controlling the polar component to 3.5-20 mJ/m², which fundamentally alters how the ink interacts with irregular surfaces. This parameter optimization enables the ink to achieve wrinkle-free attachment on curved and irregular surfaces without requiring complex artisan techniques, directly resolving the contradiction between attachment quality and process complexity
Solution Approach 2:
The ink is formulated as a composite system containing water, coloring material, resin, and organic solvent with specifically controlled surface free energy characteristics. This composite formulation enables the ink to simultaneously achieve stable discharge, excellent adhesion, and wrinkle-free attachment on irregular surfaces, eliminating the need for artisan techniques while maintaining high attachment quality
2Stability of the object's composition
If ink formulation is optimized for dispersion stability, then storage stability improves, but water resistance and abrasion resistance deteriorate
Solution Approach 1:
The patent optimizes the surface free energy polar component parameter to a specific range (3.5-20 mJ/m²) and controls the resin content (0.1-10% by mass) to achieve a balanced formulation. This parameter optimization enables the ink to simultaneously achieve excellent dispersion stability for storage and high water resistance with abrasion resistance, resolving the contradiction between compositional stability and reliability
Solution Approach 2:
The ink uses a composite formulation combining water, coloring material, resin, and organic solvent with specifically controlled proportions and surface free energy characteristics. This composite structure enables the ink to achieve both stable dispersion during storage and high water/abrasion resistance after drying, eliminating the trade-off between these properties
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 achieves stable discharge, excellent adhesion, and durable printed images with high water and abrasion resistance, suitable for irregular surfaces without wrinkles, reducing labor and costs.
Implementation Method 1
the dried layer of the ink has a surface free energy γs having a polar component γsp of from 3.5 to 20 J/m2 at 25 degrees C.
Implementation Method 2
providing high water resistance and abrasion resistance
Data Source
AI summary
An ink contains water, a coloring material, a resin, and an organic solvent, wherein the dried layer of the ink has a surface free energy γs having a polar component γsp of from 3.5 to 20 J/m2 at 25 degrees C.