Ink Jet Recording Liquid Removal via Particle Size Control
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Solution Overview
Problem
Ink jet recording methods struggle to efficiently remove liquid components from images, particularly when the image contains a large amount of liquid, as existing porous bodies may not provide sufficient capillarity pressure for effective absorption, leading to issues like curing or cockling of recording media.
Innovation Solution
An ink jet recording method and apparatus that uses a porous body with a specific combination of particles differing in average particle diameter to absorb the liquid component from the image, where the ink contains first and second particles satisfying certain ratios, and a reaction liquid is applied to increase the ink's viscosity, facilitating efficient liquid removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a porous body is brought into contact with the image to remove the liquid component, then the liquid component can be absorbed, but the capillarity pressure of the porous body may be insufficient when the image contains a large amount of liquid
Solution Approach 1:
The invention changes the physical parameters of the ink by controlling particle size distribution (D1/D2≤0.5) and particle composition ratios (0.2≤M1/M2≤5.0), which modifies the liquid component removal characteristics. This parameter optimization ensures effective absorption even when the image contains large amounts of liquid, resolving the contradiction between liquid removal efficiency and absorption effectiveness.
Solution Approach 2:
The invention uses a composite ink formulation combining multiple particle types with specific size distributions and composition ratios. This composite approach creates an ink system that works synergistically with the porous body to achieve effective liquid component removal, addressing the insufficiency of conventional single-component inks.
2Quantity of substance
If the recording medium absorbs excessive liquid component, then the image can be formed, but curing or cockling occurs
Solution Approach 1:
The invention performs preliminary liquid component removal by optimizing the ink formulation before the recording process. By controlling particle size distribution and composition ratios in advance, the ink is prepared to reduce excessive liquid absorption during recording, preventing curing or cockling before they occur.
Solution Approach 2:
The invention modifies ink parameters (particle size distribution D1/D2≤0.5, composition ratio 0.2≤M1/M2≤5.0) to control liquid component behavior. This parameter optimization ensures that the recording medium absorbs the appropriate amount of liquid without causing harmful effects like curing or cockling.
3Quantity of substance
If thermal energy is used to dry the liquid component, then the liquid can be removed, but additional energy consumption is required
Solution Approach 1:
The invention replaces thermal energy-based drying mechanisms with a physical formulation approach. By optimizing particle size distribution and composition ratios, the ink is designed to facilitate liquid component removal through capillary action and physical absorption mechanisms, eliminating the need for additional thermal energy input.
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 reduces the liquid content in the image, preventing excessive absorption by the recording medium and minimizing issues like curing or cockling, by concentrating the ink and reducing voids within the image, thus enhancing the absorption efficiency of the porous body.
Implementation Method 1
a porous body of a liquid absorbing member is brought into contact with the image to allow the porous body to absorb at least a part of the aqueous liquid component from the image
Data Source
AI summary
An ink jet recording method includes an absorption/removal treatment of an aqueous liquid component by using a porous body from an image formed by using an ink and a reaction liquid that increases the viscosity of the ink. The ink contains at least two or more types of particles having different particle diameters, and the particles having different particle diameters satisfy the expressions (1) and (2):D1/D2≤0.5 (1)0.2≤M1/M2 (2).