Pseudoplastic Ink Composition for Stable Thick Surface Coatings
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Solution Overview
Problem
Solvent-type inks used for road surfaces and building coatings pose health and environmental hazards due to volatile organic compounds (VOCs), necessitating a safer alternative with improved discharge stability and concealability.
Innovation Solution
An ink formulation comprising a solvent, resin, and thickening particles with specific viscosity ranges at varying shear rates to ensure pseudoplastic flow, enhancing discharge stability and concealability on surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-type inks are used to replace solvent-type inks, then health hazards and environmental pollution are reduced, but drying time increases and climate resistance decreases
Solution Approach 1:
The patent changes the physical and chemical parameters of the water-type ink by controlling viscosity within specific ranges (3.00×10³-2.50×10⁴ mPa·s at 1 s⁻¹ shear rate, 130 mPa·s or less at 5,000 s⁻¹ shear rate) and adjusting composition ratios to improve drying performance while maintaining low VOC content
Solution Approach 2:
The patent creates a composite ink formulation combining water-type base with carefully selected additives and resins to achieve both environmental sustainability and improved drying characteristics, merging benefits of water-type inks with performance enhancements
2Manufacturing precision
If high viscosity is maintained to prevent infiltration and form thick coating films, then concealability improves, but discharge stability during inkjet printing deteriorates
Solution Approach 1:
The patent employs pseudoplastic flow characteristics where viscosity dynamically changes based on shear rate: high viscosity at low shear rates prevents infiltration and ensures concealability, while low viscosity at high shear rates during inkjet discharge maintains stable flow and prevents clogging
Solution Approach 2:
The patent optimizes viscosity parameters across different shear rates to achieve dual functionality: sufficient thickness for concealability while maintaining flow properties for reliable inkjet discharge
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 and forms thick, non-infiltrating coating films on road and building surfaces, improving concealability while minimizing VOC emissions.
Implementation Method 1
The ink contains a solvent, a resin, and thickening particles, and has a viscosity of 3.00×10³ mPa·s or more and 2.50×10⁴ mPa·s or less at 25° C. at a shear rate of 1 s⁻¹, and a viscosity of 130 mPa·s or less at 25° C. at a shear rate of 5,000 s⁻¹
Data Source
AI summary
Provided is an ink including a solvent, a resin, and thickening particles. The ink has a viscosity of 3.00×103 mPa·s or more and 2.50×104 mPa·s or less at 25° C. at a shear rate of 1 s−1, and a viscosity of 130 mPa·s or less at 25° C. at a shear rate of 5,000 s−1.