Ink Jet Ink Composition Silicate Nozzle Adhesion
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Solution Overview
Problem
Ink jet ink compositions containing inorganic oxide particles tend to adhere to nozzle plates, leading to flight bending, intermittent printing stability degradation, and nozzle clogging due to low water-repellent properties and particle aggregation, which complicates cleaning and clogging recovery.
Innovation Solution
A water-based ink jet ink composition incorporating inorganic oxide particles and water-soluble silicate, with a silicate content of 0.5% or less by mass, improves the water-repellent properties of the nozzle plate, enhancing intermittent printing stability and clogging recovery by preventing particle aggregation and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inorganic oxide particles are added to improve color development property and wet abrasion resistance, then color quality improves, but the ink adheres to nozzle plate and causes clogging
Solution Approach 1:
A water-soluble silicate is introduced as an intermediary substance between the inorganic oxide particles and the nozzle plate. The silicate forms a protective layer or modifies the interaction interface, preventing particle adhesion to the nozzle while maintaining the color development properties of the ink composition.
Solution Approach 2:
The patent specifies precise parameter ranges for inorganic oxide particle size (0.1-10 μm) and water-soluble silicate concentration (0.01-5% by mass). By optimizing these parameters, the ink achieves both good color development and reduced nozzle adhesion, resolving the contradiction through quantitative control of physical and chemical properties.
2Strength
If inorganic oxide particles are used to enhance wet abrasion resistance, then durability improves, but intermittent printing stability deteriorates due to particle aggregation
Solution Approach 1:
The water-soluble silicate acts as a dispersing intermediary that prevents inorganic oxide particles from aggregating during storage and ejection. This maintains uniform particle distribution, ensuring both abrasion resistance and stable intermittent printing performance.
Solution Approach 2:
The ink composition creates a composite system combining colorant particles, inorganic oxide particles, and water-soluble silicate. This composite structure synergistically provides durability through inorganic oxide while the silicate matrix prevents aggregation, maintaining compositional stability during intermittent use.
3Manufacturing precision
If inorganic oxide particles are added to suppress curling, then recording quality improves, but cleaning complexity increases due to adhesion
Solution Approach 1:
The water-soluble silicate serves as a release intermediary between inorganic oxide particles and the nozzle plate surface. This intermediary layer allows particles to be easily removed during cleaning while maintaining their curling suppression function during printing.
Solution Approach 2:
The patent converts the potential harm of particle adhesion into a benefit by using water-soluble silicate to create controlled, reversible adhesion. The particles adhere sufficiently to suppress curling but can be easily removed with water-based cleaning, transforming a cleaning difficulty into a simple maintenance procedure.
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 effectively suppresses curling, improves intermittent printing stability, and enhances clogging recovery by maintaining the nozzle's water-repellent properties and preventing particle aggregation, ensuring stable ink jet printing.
Implementation Method 1
an ink composition containing inorganic oxide particles as disclosed in JP-A-2020-176235 is not likely to be repelled by a nozzle plate and is liable to be adhered to a nozzle periphery
Implementation Method 2
enhancing intermittent printing stability and clogging recovery by preventing particle aggregation and adhesion
Data Source
AI summary
An ink jet ink composition is a water-based ink which contains a colorant; inorganic oxide particles; a watersoluble silicate; and water, and a content of the watersoluble silicate with respect to a total mass of the ink is 0.5 percent by mass or less.