Ink Jet Treatment Liquid Composition for Stable Ejection and Image Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ink jet recording methods using treatment liquids to suppress bleeding irregularity generate foreign materials during storage or in ink jet recording apparatuses, leading to storage stability issues and ejection failures.
Innovation Solution
A water-based treatment liquid comprising a polyvalent metal salt, acrylic-based or maleic acid-based resin, and an organic acid or amine, with specific pH and resin content, is used to stabilize the liquid and prevent foreign material generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a treatment liquid containing an aggregating agent is used to rapidly fix ink and suppress bleeding irregularity, then image quality is improved, but foreign materials are generated during storage or in the ink jet recording apparatus
Solution Approach 1:
The patent applies parameter changes by carefully controlling the pH of the treatment liquid within the range of 5.5 to 7.5 and limiting the resin content to 1% by mass or less. These parameter adjustments optimize the aggregating agent's effectiveness for image quality while preventing foreign material generation during storage and ejection
Solution Approach 2:
The treatment liquid uses a composite formulation combining a polyvalent metal salt (aggregating agent) with specifically controlled resin components (acrylic-based or maleic acid-based). This composite approach maintains the ink-fixing effectiveness while the controlled resin content prevents foreign material generation
2Manufacturing precision
If the treatment liquid is formulated to achieve excellent image quality, then bleeding irregularity is suppressed, but storage stability deteriorates due to foreign material generation
Solution Approach 1:
The patent resolves this contradiction by changing the pH parameter to the range of 5.5 to 7.5 and controlling resin content to 1% by mass or less. These parameter changes maintain the treatment liquid's ability to suppress bleeding irregularity while ensuring storage stability by preventing foreign material generation
3Manufacturing precision
If the treatment liquid contains sufficient aggregating agent for effective ink fixing, then image quality improves, but ejection failure occurs in the ink jet head
Solution Approach 1:
The patent applies parameter changes by controlling the pH to 5.5-7.5 and resin content to 1% by mass or less, which maintains the aggregating agent's effectiveness for ink fixing while preventing the liquid from becoming too viscous or forming foreign materials that would cause ejection failure
Solution Approach 2:
The treatment liquid uses a composite formulation with controlled resin content (1% by mass or less) combined with polyvalent metal salt. This composite approach ensures sufficient ink fixing effectiveness while maintaining ejection reliability by preventing excessive viscosity and foreign material formation
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 solution effectively suppresses foreign material generation, enhances storage stability, and maintains ink jet ejection reliability while improving image quality and abrasion resistance.
Implementation Method 1
a reaction liquid (treatment liquid) containing an aggregating agent which aggregates at least one ink component
Implementation Method 2
the treatment liquid comprises: a polyvalent metal salt; a resin selected from an acrylic-based resin and a maleic acid-based resin; and a compound selected from an organic acid and an organic amine
Data Source
AI summary
A water-based treatment liquid is used for recording together with an ink jet ink which is a water-based ink composition, and the treatment liquid contains: a polyvalent metal salt; a resin selected from an acrylic-based resin and a maleic acid-based resin; and a compound selected from an organic acid and an organic amine. In the treatment liquid described above, a content of the resin with respect to a total mass of the treatment liquid is 1 percent by mass or less, and the treatment liquid has a pH of 5.5 to 7.5.