Ink Jet Recording Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink jet recording methods for textiles face challenges in achieving optimal bleed-through resistance and friction fastness, particularly when using organic acids as aggregating agents, which can lead to ink permeation and reduced wet friction fastness.
Innovation Solution
An ink jet recording method involving a treatment liquid adhesion step with an organic acid, followed by a colored ink and transparent ink adhesion step, where the timing and composition are carefully controlled to promote rapid neutralization and aggregation, enhancing bleed-through resistance and friction fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a treatment liquid containing an organic acid and water is applied to fabric by ink jet method, then color developing properties are improved, but bleed-through resistance deteriorates
Solution Approach 1:
The patent applies treatment liquid containing organic acid preliminarily to the fabric before applying colored ink. This preliminary action prepares the fabric surface to enhance color development while the subsequent rapid application of colored ink within 5 minutes prevents bleed-through by maintaining the acid in an effective state for aggregation.
Solution Approach 2:
The patent maintains continuous action by applying the colored ink within 5 minutes after applying the treatment liquid. This continuous process ensures the organic acid remains effective for both color development and preventing ink permeation, avoiding interruption that would allow bleed-through to occur.
2Measurement precision
If treatment liquid with organic acid is applied to fabric, then color developing properties are enhanced, but friction fastness deteriorates
Solution Approach 1:
The treatment liquid with organic acid is applied preliminarily to prepare the fabric surface for enhanced color development. The rapid follow-up application of colored ink within 5 minutes ensures that the acid aggregates the ink particles before they can be compromised by friction, thus maintaining both color development and friction fastness.
Solution Approach 2:
The patent controls the time parameter by requiring colored ink application within 5 minutes after treatment liquid application. This parameter control ensures the organic acid concentration remains sufficient for both color development and creating a friction-resistant coating through aggregation.
3Strength
If colored ink is applied immediately after treatment liquid, then aggregation is enhanced, but bleed-through resistance may worsen if time exceeds 5 minutes
Solution Approach 1:
The patent establishes a periodic action window of 5 minutes between applying treatment liquid and colored ink. This time window is optimized to maintain sufficient organic acid concentration for strong aggregation while preventing the acid from degrading to a point where bleed-through occurs.
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 bleed-through resistance and friction fastness by ensuring rapid mixing and aggregation of inks on the fabric surface, forming a robust coating film that enhances color developing properties.
Implementation Method 1
a treatment liquid adhesion step of adhering a treatment liquid composition containing an organic acid and water to any place on a fabric... an amount of an acidic group derived from the organic acid adhering to the any place is 4.5 mmol/m2 or more... a colored ink adhesion step of adhering a liquid droplet of a colored ink composition containing a pigment, an anionic first resin particle, and water
Data Source
AI summary
There is provided an ink jet recording method that includes a treatment liquid adhesion step of adhering a treatment liquid containing an organic acid and water to any place on a fabric by an ink jet method; a colored ink adhesion step of adhering a liquid droplet of a colored ink composition containing a pigment, an anionic first resin particle, and water to the any place by the ink jet method; and a transparent ink adhesion step of adhering a liquid droplet of a transparent ink composition containing an anionic second resin particle and water to the any place by the ink jet method. In the treatment liquid adhesion step, an amount of an acidic group derived from the organic acid adhering to the any place is 4.5 mmol/m2 or more, and a shortest time difference |α| between adhesion of one of the colored ink composition and the treatment liquid composition to the any place and subsequent adhesion of another of the colored ink composition and the treatment liquid composition to the any place is within 5 min.