Oily Inkjet Ink Solvent System for Penetration Drying
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Solution Overview
Problem
Oily inkjet inks face challenges with roller transfer staining and stability due to limitations in viscosity, which affect penetration drying characteristics and jetting-out stability, especially when printing on various paper types.
Innovation Solution
The development of an oily inkjet ink comprising a hydrocarbon solvent, a solvent with ester and ether groups, and a solvent soluble in both, which enhances penetrability and stability by adjusting solvent proportions and types, such as using diesters and higher fatty acid esters, to improve compatibility and wettability with different papers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If viscosity is adjusted to improve penetration drying characteristics, then penetration drying is improved, but jetting-out stability and storage stability become bad
Solution Approach 1:
The invention changes the chemical composition parameters of the solvent system by introducing a specific solvent component with ester and ether groups, rather than adjusting viscosity through conventional means. This allows penetration drying characteristics to be improved through chemical interaction with paper fibers while maintaining acceptable viscosity levels for jetting-out stability and storage stability.
Solution Approach 2:
The invention uses a composite solvent system combining hydrocarbon solvent, ester-ether solvent, and higher fatty acid ester. This composite approach creates synergistic effects where the ester-ether solvent component enhances penetration drying through its chemical interaction with paper, while the hydrocarbon and higher fatty acid ester components maintain viscosity characteristics necessary for stable jetting-out and storage.
2Manufacturing precision
If solvent composition is changed to enhance penetration drying, then penetration drying is improved, but solubility between solvents deteriorates
Solution Approach 1:
The higher fatty acid ester acts as an intermediary component that is soluble in both the hydrocarbon solvent and the ester-ether solvent. This intermediary facilitates the formation of a stable, homogeneous mixture by bridging the two less compatible solvent types, ensuring good solubility between components while still allowing the ester-ether solvent to enhance penetration drying characteristics.
Solution Approach 2:
The invention carefully adjusts the compositional parameters of the solvent system, specifying that the solvent contains a hydrocarbon solvent, a solvent with ester and ether groups, and a higher fatty acid ester. This parameter optimization ensures sufficient solubility between different solvent components while maintaining the penetration drying enhancement provided by the ester-ether solvent.
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 penetration drying characteristics, suppresses roller transfer staining, and ensures reliable jetting-out and storage stability across various paper types without relying on viscosity adjustments.
Implementation Method 1
improve compatibility and wettability with different papers
Implementation Method 2
improve compatibility and wettability with different papers
Implementation Method 3
penetration drying characteristics
Data Source
AI summary
An oily inkjet ink comprises a pigment, a pigment dispersant, and a solvent, wherein the solvent contains a hydrocarbon type solvent (A), a solvent (B) having at least an ester group and an ether group in one molecule, and a solvent (C) that is soluble in the hydrocarbon type solvent and the solvent having at least an ester group and an ether group in one molecule.