Oil-Based Ink Composition for Vivid Line Formation
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Solution Overview
Problem
Conventional oil-based ink compositions are inferior in coating film glossiness, drawn line-fixing property, and drying property, especially on ink-non-absorbing surfaces like plastic and resin film, and lack vivid and clear line formation due to insufficient titanium oxide content and compatibility issues between solvents and resins.
Innovation Solution
An oil-based ink composition comprising a colorant, titanium oxide, a solvent combination of propylene glycol monomethyl ether and ethanol, polyvinylbutyral resin, and ketone resin, with optional modified silicone additives, which enhances glossiness, fixing, and drying properties, and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional oil-based ink compositions are used, then the ink can write on various surfaces, but the coating film glossiness and drawn line-fixing property are inferior
Solution Approach 1:
The patent changes the chemical parameters of the ink composition by introducing a specific solvent system (propylene glycol monomethyl ether and ethanol in defined ratios) and resin combination (polyvinylbutyral and ketone resin) to improve both fixing property and glossiness simultaneously
Solution Approach 2:
The patent uses a composite resin system combining polyvinylbutyral resin with ketone resin to achieve both good fixing property on ink-non-absorbing surfaces and high coating film glossiness that cannot be obtained with single resin systems
2Reliability
If titanium oxide is not contained or insufficient, then the ink composition is simpler, but vivid and clear drawn lines cannot be obtained
Solution Approach 1:
The patent optimizes the titanium oxide content parameter to achieve vivid and clear line formation while maintaining acceptable composition complexity through defined concentration ranges
3Device complexity
If single solvent systems are used, then the ink composition is simpler, but compatibility issues arise between solvents and resins
Solution Approach 1:
The patent merges propylene glycol monomethyl ether and ethanol into a dual solvent system where each solvent contributes specific properties: propylene glycol monomethyl ether provides resin solubility while ethanol enhances overall compatibility and adjusts viscosity, eliminating compatibility issues
Solution Approach 2:
The patent defines specific ratio parameters for the solvent mixture (propylene glycol monomethyl ether to ethanol ratio) to optimize compatibility between solvents and resins while maintaining acceptable composition complexity
4Ease of manufacture
If conventional solvent systems are used, then the ink can be formulated easily, but the drying property on ink-non-absorbing faces is inferior
Solution Approach 1:
The patent changes the solvent evaporation parameters by using a mixed solvent system with different evaporation rates: propylene glycol monomethyl ether provides controlled evaporation for good drying property while ethanol contributes to overall evaporation efficiency, achieving both ease of formulation and superior drying performance
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 composition achieves vivid and clear line formation on various surfaces, including ink-non-absorbing faces, with improved glossiness, fixing, drying, and aging stability, while maintaining fluidity and solubility.
Implementation Method 1
a solvent comprising propylene glycol monomethyl ether and ethanol, a polyvinylbutyral resin and a ketone resin
Implementation Method 2
titanium oxide... which are not compatible with each other... titanium oxide having a masking property
Implementation Method 3
a drawn line-drying property
Data Source
AI summary
Provided is an oil-based ink composition comprising at least a colorant, titanium oxide, a solvent including propylene glycol monomethyl ether and ethanol, a polyvinylbutyral resin and a ketone resin.