Water-Based Ink Fixability on Impermeable Substrates
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Solution Overview
Problem
Current water-based inks lack satisfactory fixability, high-speed printability, discharging reliability, scratch resistance, and storage stability when used on impermeable base materials, and existing solvent-based inks pose environmental hazards.
Innovation Solution
A water-based ink formulation containing organic solvents with specific Hansen solubility parameters and diol compounds, which improve fixability and discharging reliability, and include resin particles for enhanced scratch resistance and storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based inks are used on impermeable base materials, then environmental safety is improved, but fixability deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully selecting organic solvents with specific Hansen solubility parameters (δH: 4.1-9.5 MPa^1/2, boiling point ≥170°C) and controlling their content (5-60 mass%). This optimization of chemical parameters enables water-based ink to achieve satisfactory fixability on impermeable base materials while maintaining environmental safety
Solution Approach 2:
The patent uses composite materials by combining water, specifically selected organic solvents, color materials, and resin particles into a multi-component ink formulation. This composite approach leverages the advantages of each component to achieve both environmental friendliness and excellent fixability on impermeable substrates
2Object-affected harmful factors
If water-based inks are used, then environmental safety is improved, but high-speed printability deteriorates
Solution Approach 1:
The patent optimizes viscosity parameters by selecting organic solvents with specific boiling points (≥170°C) and controlling solvent content (5-60 mass%). This parameter optimization ensures appropriate ink flow characteristics for high-speed inkjet printing while maintaining water-based environmental safety
3Object-affected harmful factors
If water-based inks are used, then environmental safety is improved, but discharging reliability deteriorates
Solution Approach 1:
The patent controls the viscosity and surface tension parameters of the ink by selecting organic solvents with specific Hansen solubility parameters and boiling points, and by optimizing their content (5-60 mass%). This parameter control ensures stable ink discharge reliability in water-based formulations
4Object-affected harmful factors
If water-based inks are used, then environmental safety is improved, but scratch resistance deteriorates
Solution Approach 1:
The patent enhances scratch resistance by incorporating resin particles into the water-based ink formulation. The combination of water, organic solvents, color materials, and resin particles creates a composite ink system that provides both environmental safety and improved mechanical durability
Solution Approach 2:
The patent optimizes the molecular weight and content parameters of resin particles to enhance the mechanical properties of the dried ink film, thereby improving scratch resistance while maintaining the water-based environmentally friendly formulation
5Object-affected harmful factors
If water-based inks are used, then environmental safety is improved, but storage stability deteriorates
Solution Approach 1:
The patent improves storage stability by carefully selecting organic solvents with specific Hansen solubility parameters (δH: 4.1-9.5 MPa^1/2) and boiling points (≥170°C), and by controlling their content (5-60 mass%). This parameter optimization prevents phase separation and precipitation during storage while maintaining environmental safety
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 excellent fixability, high-speed printability, discharging reliability, and scratch resistance while maintaining storage stability, comparable to solvent-based inks, and is environmentally friendly.
Implementation Method 1
The plurality of organic solvents contain at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa1/2 or higher but 9.5 MPa1/2 or lower and a boiling point of 170° C. or higher
Implementation Method 2
at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa1/2 or higher but 9.5 MPa1/2 or lower
Implementation Method 3
at least one diol compound containing 3 or 4 carbon atoms
Data Source
AI summary
Provided is an ink containing water, a plurality of organic solvents, a color material, and resin particles, wherein the plurality of organic solvents contain at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa1/2 or higher but 9.5 MPa1/2 or lower and a boiling point of 170° C. or higher and at least one diol compound containing 3 or 4 carbon atoms.