Printing recording method
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Solution Overview
Problem
Existing ink jet printing methods face issues with ink bleeding and poor rubbing fastness due to excessive moisture, leading to permeation and inadequate color development, particularly in wet-on-wet processes where drying steps are omitted.
Innovation Solution
A printing method involving simultaneous and post-adhesion steps of chromatic and achromatic ink compositions with specific resin particles and cationic compounds, using an ink jet method with multiple perpendicular scans, to enhance ink aggregation and layer toughness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a coating liquid containing resin is applied after ink adhesion to improve rubbing fastness, then rubbing fastness is improved, but moisture amount on cloth is excessively increased causing ink permeation to rear side
Solution Approach 1:
The patent applies preliminary action by performing the coating liquid application in a controlled wet-on-wet manner immediately after ink adhesion, before the ink fully dries. This timing allows the resin to interact with the ink on the cloth surface and form a unified layer, improving rubbing fastness while preventing excessive moisture accumulation that would cause bleed-through.
Solution Approach 2:
The patent changes the parameter of moisture control by managing the drying process between ink adhesion and coating application. By controlling the timing and conditions of the wet-on-wet process, the system achieves optimal moisture levels that enable resin-ink interaction without causing ink permeation to the rear side of the cloth.
2Productivity
If wet-on-wet printing method is used to improve efficiency by omitting drying step, then productivity is improved, but bleeding and poor rubbing fastness occur
Solution Approach 1:
The patent merges the ink adhesion and coating application processes into a single wet-on-wet operational flow, eliminating the intermediate drying step. This consolidation improves productivity while maintaining reliability through the synergistic interaction between ink and coating liquid on the cloth surface.
Solution Approach 2:
The patent changes the physical state parameters of the ink and coating liquid by maintaining them in a wet state during the combined process. This parameter change enables the wet-on-wet method to achieve both high productivity and reliable bleeding suppression with good rubbing fastness.
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 method achieves improved rubbing fastness and color development by facilitating ink thickening and forming a robust outermost layer, effectively suppressing bleed-through and enhancing color properties.
Implementation Method 1
a chromatic ink adhesion step of adhering a liquid droplet of a chromatic ink composition which contains a pigment and an anionic first resin particle to a cloth; a treatment liquid adhesion step of adhering a liquid droplet of a treatment liquid which contains a cationic compound to the cloth
Implementation Method 2
facilitating ink thickening and forming a robust outermost layer, effectively suppressing bleed-through
Data Source
AI summary
A printing recording method includes: a chromatic ink adhesion step of adhering a liquid droplet of a chromatic ink composition which contains a pigment and an anionic first resin particle to a cloth; a treatment liquid adhesion step of adhering a liquid droplet of a treatment liquid which contains a cationic compound to the cloth; and an achromatic ink adhesion step of adhering a liquid droplet of an achromatic ink composition which contains an anionic second resin particle to the cloth.