Ink Jet Composition Set
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Solution Overview
Problem
Existing ink jet recording methods using treatment liquid compositions with organic acids or polyvalent metal salts for aggregating ink result in decreased wet friction fastness due to water solubility of aggregates, and optimal neutralization reaction conditions are not sufficiently addressed.
Innovation Solution
An ink jet composition set is formulated with specific molarities of acidic and basic groups in treatment and coloring ink compositions, satisfying the condition Ca1−(Cb1+1.5Cb2)≥0.10(mol/kg), promoting dispersion of resin particles and reducing ink elution during wet friction, while balancing the role of base compounds to enhance wet friction fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If organic acid or polyvalent metal salt is used for aggregating ink in treatment liquid, then ink aggregation is improved, but wet friction fastness deteriorates due to water solubility of aggregates
Solution Approach 1:
The patent changes the chemical parameters by specifying precise molarity relationships between acidic groups (Ca1) and basic groups (Cb1, Cb2) in the treatment liquid and coloring ink composition. By controlling the neutralization reaction extent through the formula Ca1−(Cb1+1.5Cb2)≥0.10, the patent optimizes aggregate formation to achieve both ink aggregation and wet friction fastness simultaneously.
Solution Approach 2:
The patent creates a composite system combining treatment liquid composition (with acid compound and base compound A) and coloring ink composition (with base compound B). This composite approach allows the synergistic interaction between multiple components to achieve improved ink aggregation while maintaining wet friction fastness through balanced neutralization.
2Reliability
If base compound amount is increased to balance neutralization reaction, then wet friction fastness is improved, but ink dispersion may be compromised
Solution Approach 1:
The patent precisely controls the molarity parameters of basic groups (Cb1, Cb2) relative to acidic groups (Ca1) to maintain optimal dispersion conditions while achieving sufficient neutralization for wet friction fastness. The formula Ca1−(Cb1+1.5Cb2)≥0.10 defines the exact parameter range where both dispersion stability and fastness are optimized.
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 composition set achieves improved wet friction fastness in printed matters by ensuring adequate dispersion and reduced ink elution, particularly when the molarities of acidic and basic groups adhere to the specified range, enhancing the durability of printed textiles.
Implementation Method 1
an organic acid undergoes a neutralization reaction with an anion component in the ink, thereby reducing the hydrophilicity of the anion component
Implementation Method 2
the acid compound in the treatment liquid composition causes dispersion destruction of resin particles in the coloring ink composition
Data Source
AI summary
Provided is an ink jet composition set containing a coloring ink composition and a treatment liquid composition. The coloring ink composition contains a pigment, resin particles, a base compound A, and water. The treatment liquid composition contains an acid compound and water and may contain a base compound B. A molarity Ca1 (mol/kg) of an acidic group by the acid compound, a molarity Cb1 (mol/kg) of a basic group by the base compound A, and a molarity Cb2 (mol/kg) of a basic group by the base compound B satisfy a relation Ca1−(Cb1+1.5Cb2)≥0.10 (mol/kg).