Inkjet Recording Method Using Controlled Aggregating Agent Attachment
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Solution Overview
Problem
Ink jet recording methods face challenges in achieving high image quality with color images that have high density and quality without bleeding, as excessive reaction solution coating leads to odor and durability issues, while insufficient coating results in poor aggregability.
Innovation Solution
A recording method involving a reaction solution with an aggregating agent applied at a specific attachment amount (100 nmol/inch2 to 1500 nmol/inch2) and a color ink composition including a coloring material and resin, discharged as liquid droplets at high density (600 dpi or more), to form recording regions on absorptive or low-absorptive media, optimizing aggregability and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the coating amount of reaction solution is increased to improve aggregability, then the aggregability is improved, but odor is generated and durability deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the attachment amount of the aggregating agent within a specific range (100-1500 nmol/inch²) and the timing of ink composition attachment (within 30 seconds). This optimized parameter combination achieves favorable aggregability while suppressing odor generation and maintaining durability, resolving the trade-off between aggregability improvement and harmful side effects.
2Stability of the object's composition
If the coating amount of reaction solution is increased to improve aggregability, then the aggregability is improved, but the durability of recorded matter deteriorates
Solution Approach 1:
The patent resolves this contradiction by optimizing parameters including the attachment amount of aggregating agent (100-1500 nmol/inch²), the type of aggregating agent (multivalent metal salts or organic acids), and the timing of ink composition attachment (within 30 seconds). These parameter optimizations achieve favorable aggregability while maintaining durability of the recorded matter.
3Quantity of substance
If ink jet coating is used to control coating amount of reaction solution, then coating amount can be controlled, but the trade-off between aggregability improvement and odor/durability issues is not completely solved
Solution Approach 1:
The patent goes beyond simply controlling coating amount by optimizing multiple parameters simultaneously: the attachment amount of aggregating agent (100-1500 nmol/inch²), the chemical nature of the aggregating agent (multivalent metal salts or organic acids), and the timing of ink composition attachment (within 30 seconds). This multi-parameter optimization achieves favorable aggregability while suppressing odor and maintaining durability, completely solving the trade-off issue.
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 effectively improves aggregability and durability while minimizing odor, achieving favorable printing results with precise control over the reaction solution and ink composition attachment.
Implementation Method 1
a reaction solution which includes an aggregating agent which is able to aggregate components of a color ink composition
Data Source
AI summary
Disclosed is a recording method including attaching a reaction solution which forms a recording region S1 by attaching a reaction solution which includes an aggregating agent which is able to aggregate components of a color ink composition to a target recording medium with an attachment amount of 100 nmol/inch2 to 1500 nmol/inch2 of the aggregating agent, and attaching a color ink composition which forms a recording region S2 by attaching the color ink composition which includes a coloring material and a resin to the recording region S1 within 30 seconds of attaching the reaction solution.