Textile Inkjet Ink Composition for Stable Single-Pass Printing
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Solution Overview
Problem
Inkjet textile printing methods face challenges with unstable emission speed and direction when using high-concentration dyes, leading to landing deviations and poor image sharpness, especially during single pass methods.
Innovation Solution
An ink formulation containing isomer dyes A and B, where dye B is more hydrophobic than dye A, stabilizes emission properties by forming a micelle structure that maintains hydrogen bond transmission, preventing association states and ensuring consistent droplet emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a high concentration of dye is used in the ink, then the printing density is improved, but the emission speed and emission direction become unstable
Solution Approach 1:
The patent changes the chemical composition parameters of the ink by introducing a specific buffer system (phosphate buffer at pH 6.0-7.0) and controlling the ratio of hydrophilic to hydrophobic dyes. This parameter adjustment stabilizes the emission properties while maintaining high dye concentration for good printing density.
Solution Approach 2:
The patent uses a buffer substance as an intermediary component that mediates between the high concentration dye and the water-based solvent. The buffer stabilizes the pH and prevents dye aggregation, thereby maintaining emission stability even at high dye concentrations.
2Illumination intensity
If a high concentration of dye is used in the ink, then the printing density is improved, but landing deviation occurs
Solution Approach 1:
The patent adjusts the ink composition parameters, specifically maintaining pH between 6.0-7.0 using phosphate buffer and controlling dye concentration within 5-20 wt%. This parameter optimization ensures precise droplet placement while achieving sufficient printing density.
Solution Approach 2:
The buffer substance acts as an intermediary that prevents harmful interactions between high concentration dyes and water, ensuring stable droplet formation and accurate landing positions throughout the printing process.
3Productivity
If textile printing is performed by a single pass method, then the production efficiency is improved, but the straight line clarity and image sharpness deteriorate
Solution Approach 1:
The patent optimizes ink flow parameters by adjusting viscosity and surface tension through buffer addition and dye selection. This enables stable single-pass printing with sharp image quality, eliminating the need for multi-pass methods while maintaining high production efficiency.
Solution Approach 2:
The patent enables continuous single-pass printing by stabilizing the ink emission properties throughout the entire printing process. The buffered ink formulation maintains consistent droplet characteristics, allowing high-quality images to be produced in a single continuous pass without degradation of sharpness.
4Illumination intensity
If a high concentration of dye is used in the ink, then the printing density is improved, but the emission direction becomes unstable
Solution Approach 1:
The patent modifies the ink's physical-chemical parameters by introducing phosphate buffer and selecting dyes with appropriate hydrophilic-lipophilic balance. This stabilizes the emission direction while maintaining high dye concentration for good printing density.
Solution Approach 2:
The buffer substance serves as an intermediary that prevents dye-dye and dye-solvent interactions that would cause emission direction instability. It maintains a stable chemical environment that ensures consistent droplet trajectory even at high dye concentrations.
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 stabilizes emission speed and direction, prevents landing deviations, and enhances image sharpness, particularly during single pass textile printing by maintaining a balanced micelle structure and hydrogen bond transmission mechanism.
Implementation Method 1
stabilizes emission properties by forming a micelle structure that maintains hydrogen bond transmission
Implementation Method 2
maintains hydrogen bond transmission
Implementation Method 3
dye B is more hydrophobic than the dye A
Data Source
AI summary
An object of the present invention is to provide an ink for inkjet textile printing and an inkjet textile printing method, stabilizing an emission speed and an emission direction from an inkjet recording device even when the ink contains a dye at a high concentration, capable of preventing landing deviation, and capable of drawing a straight line clearly and improving image sharpness particularly when textile printing is performed by a single pass method. The object is achieved by an ink for inkjet textile printing containing at least water, an alkylene glycol, a dye A, and a dye B, in which the dye A and the dye B are in an isomer relationship, the dye B is more hydrophobic than the dye A, and a content molar ratio between the dye A and the dye B (dye A/dye B) is from 40/60 to 80/20, and an inkjet textile printing method for performing textile printing by emitting the ink for inkjet textile printing from an inkjet head.