Ink Set Coloring Materials for Bleed Resistance
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Solution Overview
Problem
Existing ink sets for inkjet recording methods lack excellent bleed resistance, initial filling properties, and continuous printing stability, in addition to ozone, light, and moisture resistance.
Innovation Solution
An ink set comprising yellow, magenta, and cyan inks, each containing specific coloring materials represented by Formulae (Y-1), (Y-2), (M-1), (M-2), (C-1), and (C-2), with the yellow ink including an alkylene oxide adduct of acetylene glycol and polyoxy alkylene alkyl ether, and the magenta and cyan inks containing specific heterocyclic groups, to enhance tinting strength, light resistance, and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coloring materials are used in ink sets, then the ink set can be manufactured with simple composition, but the bleed resistance and continuous printing stability are insufficient
Solution Approach 1:
The patent changes the chemical parameters of the coloring materials by specifying precise molecular structures (Formulae Y-1, Y-2, M-1, M-2, C-1, C-2) with defined substituents and functional groups. This parameter change transforms conventional coloring materials into specifically engineered dyes that provide superior bleed resistance and continuous printing stability while maintaining manageable composition complexity through systematic molecular design.
Solution Approach 2:
The patent employs composite coloring material systems where multiple dye compounds (represented by different formulae) are combined in specific ink formulations. For example, yellow ink combines coloring materials from Formulae Y-1 and Y-2, while magenta and cyan inks use combinations from Formulae M-1/M-2 and C-1/C-2 respectively. This composite approach enhances overall ink performance in terms of bleed resistance and printing stability.
2Reliability
If standard coloring materials are used, then the manufacturing process remains simple, but ozone resistance, light resistance, and moisture resistance are insufficient
Solution Approach 1:
The patent modifies the chemical parameters of coloring materials by incorporating specific functional groups (carboxyl, sulfonic acid, hydroxyl, amino groups) and molecular structures (Formulae Y-1, Y-2, M-1, M-2, C-1, C-2) that inherently provide enhanced ozone, light, and moisture resistance. These parameter changes are achieved through controlled synthesis processes that maintain manufacturing feasibility while significantly improving durability and resistance properties.
3Reliability
If basic ink formulations are used, then the initial filling properties are adequate, but the continuous printing properties and fastness are insufficient
Solution Approach 1:
The patent optimizes ink formulation parameters by precisely controlling the molecular structures of coloring materials (Formulae Y-1, Y-2, M-1, M-2, C-1, C-2) and their concentrations in each ink type. This parameter optimization ensures excellent continuous printing properties and fastness while managing formulation complexity through systematic approaches to dye selection and concentration control.
Data Source
AI summary
There is provided an ink set including at least: a yellow ink; a magenta ink; and a cyan ink, in which the yellow ink includes one or more kinds selected from a group consisting of coloring materials represented by the following Formulae (Y-1) and (Y-2), the magenta ink includes one or more kinds selected from a group consisting of coloring materials represented by the following Formulae (M-1) and (M-2), and the cyan ink includes one or more kinds selected from a group consisting of coloring materials represented by the following Formulae (C-1) and (C-2).